I’ve banned query strings | Hacker News Reader

I’ve banned query strings

chrismorgan.info

576 pointssusam297 comments

You know I was actually really curious about this so I went back to the HTML and URL W3C standards and surprisingly they don't actually have any definitions of format other than being percent encoded. One might conflate query strings with "form-urlencoded"[0] query strings, which is one potential interoperability format, but in general a queries string is just any percent encoded string following a "?" in a url[1], and just another property in the "URL" HTML object that can be used in the generation of a response. While additionally there is a URLSearchParams object that is the result of parsing the query string with the form-urlencoded parser, this is simply an interoperability layer for JavaScript.

I'm going to be honest, I was pretty geared up to have a contrarian opinion until I looked at the standards but they're actually pretty clear, a 404 could be a proper response to unexpected query string; query string is as much part of the URL API as the path is and I think pretty much everyone can acknowledge that just tacking random stuff onto the path would be ill advised and undefined behavior.

[0]: https://url.spec.whatwg.org/#application/x-www-form-urlencod...

[1]: https://url.spec.whatwg.org/#url-class

Back in the day it was reasonably common for CMSs and forums to only have an index.php, and routing entirely by query string (in form-urlencoded form, people were not savages). So you would have index.php?p=home and index.php?p=shop. Or index.php?action=showthread&forum=42&thread=17976. It should be immediately obvious that in that scheme 404 is indeed the correct answer to unknown query parameters

In fact lots of sites still work like that, they just hide it behind a couple rewrite rules in apache/nginx for SEO reasons

At the risk of naming an Eldritch horror, IIRC it was Cold Fusion that first adopted something like an MVC-in-querystring routing system in the late 90s or early 00s, and that eventually spread when FCGI caught on and users of other languages got used to long-running middleware processes. It seemed hella elegant at the time.

Tangent: Much like PHP, "modern" CF isn't actually that bad to work with these days. In particular the superset-of-html syntax has been superseded for pure logic by "CFScript" which is just an ECMAScript dialect.

There's even a package manager, test harness, etc. And of course it's JVM hosted so it's fairly easy to use Java stuff (stdlib of otherwise) if what you need doesn't exist in CF.

It's funny to read this like it's archaic knowledge, this is my base mental map of how nicer looking URLs work :)

Only when you're using something more or less file system mapped, like Apache

When the "server" is part of the application, you have a richer routing layer, that you can do with what you want

If you're routing like it's 1999, sure, 404.

On the other hand, if it's a CRUD app and you're filtering a list of entities by various field values? Returning that no items matched your selection (or an empty list, if an API) makes more sense than a 404, which would more appropriate for an attempt to pull up a nonexistent entity URI.

There is no reason you can return that "no items matched your selection" with a 404 HTTP response code instead of a 200.

You can return whatever HTTP response code you want, but if you care about knowing whether your site is working being about to look at the logs and see "That user requested a page that doesn't exist" being different to "That user requested a page that exists but had no results" is quite useful. In coding terms it's the difference between a null and an empty array.

You can do that with filtering, which should be a feature of every single logging tools.

Anyway, I agree that when you filter via queries, an empty list is more valid response than 404. That HTTP status should be returned IMHO when the requested (for example by id) item is not found (and of course with wrong paths, etc).

In this case I don't think the status should depend on the number of results. Here are you results, [] is a valid response body when there are no result. Returning 404 if there are no result (GET /books?title=a for instance) is misleading, the caller may think that /books is a non existent route and may conclude that books are reachable via another URI. To me, the querystring has no influence on the response status.

/books/1 could return 200 or 404 depending on the existence of the book#1, here it make sense because if /books/1 does not exist the API must tell it explicitly. However 404 belongs to the 4XX family which means "client error", is it an error to ask for a non existing book ? If you enter in a bookshop and ask for a book they don't have you did not "make a mistake". It's not like if you asked for a chainsaw. But in an API, especially with hypermedia, you are not supposed to request a resource that does not exist (unless the API provides a link to an existing resource that is was deleted before the caller try to reach it).

If you enter a bookshop and you ask for a book that does not exist then it's definitely your mistake.

If you ask for a book they don't have it's a different matter.

In any case, when you ask for a book in a library you are using their "search" endpoint. The equivalent to opening a books/1 url would be asking for a specific instance of a book by serial number or so. Then it's clear that you made a mistake uf you do that for an unexistent serial number...

A response code of 204 seems more appropriate but the problem is you're not allowed to send further information, which would make that descriptive response... not descriptive enough.

Code 204 is just code 200 with the "yes the body really is zero bytes this is not an error it's supposed to be like this" bit set.

I think of it like this:

/users/ returns a 404 in an API means that this resource does not exist. As in, this is not a part of the API.

/users/123 returns a 404 means this user record does not exist.

Yes this means that a 404 is context dependent but in a way that makes it easier for a human to think of and reason about.

Yes, and this is obvious if /users/ exists and returns a 400 if the ID is required. That way you can tell the difference between /users/ being there and expecting and ID, and it not being there.

Of course it is technically possible, but doing so would violate the spec.

> The 404 (Not Found) status code indicates that the origin server did not find a current representation for the target resource or is not willing to disclose that one exists.

In the above case, the server _is_ returning a representation.

https://datatracker.ietf.org/doc/html/rfc9110#name-404-not-f...

Another reason not to return a 404 in that case is that chances there will be monitor tooling in place that will treat a 404 as an "error" that will show up in your alerting, but would not be ideal; it will just be noise.

The point was that returning a 404 for unexpected query strings doesn’t just happen to okay per the specs, but that there is significant historical precedent for doing so based on application design that was common in the past.

    204 No Content

for nothing found is both not an error (because 2xx code) but also indicates there was nothing found to match the request.

If it's an API, a 200 with an empty JSON object or array in the body is legitimate as well, but a 204 is explicit.

My rule of thumb is that if you want to keep your code clean, always returning an empty collection is preferable to returning an empty response on that branch. You don't need a guard clause to null/undef-check before consuming the result. The rule applies whether we're consuming the response from a repository or an http request.

This too is not spec compliant. 204 means the request was successful but no body is being returned in the response.

Which is the equivalent of nothing found matching the request in a collection.

The alternate is basically 200 OK

followed by a JSON body of:

[]

Yea, empty response at a valid path. Isn’t 204 the code for it?

Lots of REST libraries that I’ve used treat any 400 response as an error so generating a 404 when for an empty list would just create more headaches.

Libraries that automatically throw errors for status codes in the 400 and 500 ranges are pretty obnoxious (looking at you, axios). It adds unnecessary overhead, complexity, and bad ergonomics by hijacking control flow from the app.

Responses with status codes in the 400 range are client errors, so the client shouldn't retry the same request. So a 404 is appropriate despite how annoying a library might be at handling it. Depending on which language/ecosystem you are using, there are likely more sane alternatives.

Completely agree on the axios part - one implication of that is you can't statically type the error response shapes (since exceptions can't be typed). Where as with fetch you can have a discriminated union based on the status code (eg: https://github.com/mnahkies/openapi-code-generator/blob/main...)

Although I do feel like I've seen too many instances of a 404 being used for an empty collection where it would make more sense to return `[]` and treat it as an expected (successful) state.

Generally true although 429 is often used for rate limiting so a back off and retry is appropriate. 409, 412, 428 may also be retriable depending on the specific semantics of the given situation. 421 apparently shows up commonly in HTTP/2 connection reuse and is retriable. 423 and 425 too potentially.

It would have been nice if there was an actually grouping of retriable and not retriable but in reality it’s a complete mess.

But at a minimum beware of 429. That’s not a permanent outage and is a frequent one you might get that needs a careful retry.

204 might be acceptable if you aren’t returning an entity body to describe what is missing, but do wish to indicate the request was successful.

I think the author is comfortable creating headaches for people tacking query strings onto URLs

> It should be immediately obvious that in that scheme 404 is indeed the correct answer to unknown query parameters

That's not obvious at all. If I receive json data that contains a property I'm not aware of, i don't reject the entire document for that reason. In the case of query strings, extra query parameters might be used by other parts of the stack besides yours, so rejecting the entire document because someone somewhere else is trying to pass information to itself is the wrong approach.

> other parts of the stack

As a web developer, you’re the like the guy standing with a clipboard outside a fancy club checking if people requesting entry are allowed or not. Basically, level 1 security.

If someone is not on the list, your job is to default to declining them access, not granting them access assuming level 2 security will handle them at a deeper layer.

It’s possible that the teams you work with expect fuzzy behaviour from the website but that’s a choice, not a practice.

The first layer of any web security should never be checking someone against a list, unless this can be done in less than a few milliseconds. It should only be sanity checking for basic compliance. In the analogy, this first layer should be denying entry to obviously drunk people, zebras, and a stampede of protesters.

>It’s possible that the teams you work with expect fuzzy behaviour from the website but that’s a choice, not a practice.

This is how the vast majority of websites work. The practical reason is obvious: when we model the behaviour our code depends on, we want to create the simplest possible model that allows our code to work as expected. Placing requirements on it that our code doesn't actually depend on is useless, unneeded, complexity.

> As a web developer, you’re the like the guy standing with a clipboard outside a fancy club checking if people requesting entry are allowed or not. Basically, level 1 security.

there is no security benefit to filtering out unneeded url parameters.

> there is no security benefit to filtering out unneeded url parameters.

there is - security in depth.

If a url parameter would've been a vulnerability because something lower down the stack misinterprets it (and the param wasn't necessary for your app in the first place), then you've just left a window open for the exploit.

If the set of url params are known ahead of time (which i claim should be true), then you could make adding unknown params an error.

>If a url parameter would've been a vulnerability because something lower down the stack misinterprets it

By assumption, you are using this url parameter. So you have a bug where you've forgotten to allow this parameter, which will quickly be discovered in your logs and fixed. Then the vulnerability, which you are thus far unaware of, will quickly be exposed. Those url parameters you are not using cannot hurt you.

> there is no security benefit to filtering out unneeded url parameters.

What about passing extra data to fill the server memory with either extra known junk or a script / executable to use with a zero day in an internal component or something.

To misuse the nightclub analogy: it’s like checking for bags not being larger than A4 and disallow knives and other weapons.

No 400 is correct for bad request. As unknown query parameters is clear client error.

All 4xx errors are client errors.

400 is the general “bad request” client area, indicating something is wrong with the request but not being specific about what.

404 is simply a more specific client error: it means the client asked for a resource that couldn’t be found.

That's because Apache is basically what today's JS crowd would call a "file-based router", and then the app implements the actual routing in that index.php file. Just like early SPA stored the route in a hash. It's funny how history repeats itself.

I've gone back and forth on file-based vs programmatic routing. But each has pros and cons, so in the end I implemented both in Mastro: https://mastrojs.github.io/docs/routing/

I believe Wikipedia, and all other mediawiki sites, still do that

watch?v=oHg5SJYRHA0

item?id=48076173

Ooo.. burn.

Oh no, looks like my old forum software urls.

> in form-urlencoded form, people were not savages

Oh yeah? I remember a lot of semicolons from Perl and other CGI stuff where we would now use ampersands, back in the day, both in the path and in the query. (Sometimes the ? itself would be written ;.)

Correct. In fact, the semicolon is part of the URI scheme standard, and the ampersand is just some ad-hoc thing that got adopted naturally without any standardization effort.

Yeah, URLs really don’t have much in the way of semantics. Path is clearly intended for hierarchical data and query for non-hierarchical data, and there are strong customs, some commonly supported or even enforced by libraries, but no actual rules. Ultimately, it’s just a string that the server can decide what to do with.

The really funny thing about this is that, when I was worrying about possible side effects if I responded 404, I somehow completely forgot how much of the web’s history the path has been useless for. Paths have won. No one really starts new things with URLs like /item?id=… any more. Yay!

Wikipedia web server treats anything after /wiki/ literally as the name of the article.

So en.wikipedia.org/wiki/// is the article about C++ style comments

Oh, magnificent. Lovely high-profile example to add about empty path segments being meaningful.

it looks like it goes to a disambiguation page for what "//" could refer to now (C++ style comments being the top entry), but that's delightful!

i wonder if it ought to be `/wiki/%2F%2F` instead...

Standards are just commonly accepted behaviour that somebody chose to write down somewhere. There are a great number of commonly accepted behaviours that nobody's ever bothered to encode into a formal standard, but where failure to follow the accepted practice will result in widespread breakage. There are also a great many "standards" that you would be a fool to follow to the letter. In the OP case, the only thing that will break is people trying to visit their site, who will presumably simply press the back button on their browser and go about their day. They can decide for themselves if that is an acceptable casualty. But it isn't definitionally acceptable because no standard says it isn't (nor would is suddenly become unacceptable because a standard said it was...)

Interestingly, quite a few places that should treat query strings transparently make a lot of assumptions about their structure. We ran into that when picking a new CDN, some providers didn't handle repeat parameters (?a=1&a=2) correctly.

For anyone curious like I was, form-urlencoded and the URLSearchParam API says that params should not be deduplicated or reordered. "Get" will get the first value with the given name, and GetAll will get a list of all values

https://url.spec.whatwg.org/#dom-urlsearchparams-get

What’s do you mean by correctly?

Incorrectly would be processing the query string and deduping keys. Correctly would be passing it through as-is, or at least only lightly processing it, like normalizing escaping or such.

Indeed I would expect pass through with no changes.

Though there are “smart” CDNs that will resize images etc. all beats are off for those.

> I was pretty geared up to have a contrarian opinion until I looked at the standards but they're actually pretty clear, a 404 could be a proper response to unexpected query string; query string is as much part of the URL API as the path is and I think pretty much everyone can acknowledge that just tacking random stuff onto the path would be ill advised and undefined behavior.

This feels like a technically correct is the best kind of correct situation. Like technically, yeah web servers may respond 404 if they dont understand a query parameter, but in practise that is not how urls are conceptualized normally.

Wouldn't a generic 400 be better. It's not that the page wasn't found, but you've sent something that was not an accepted request. Fix your request and try again is how I've read it, and that's how I use it in the APIs I provide. I prefer it over 406 since it's not my end that can't process it. If your query string is tacking extra stuff trying to break things or just because your request wasn't crafted per the docs, then it's on you.

406 would be wrong for me. As it is to be used when client sends Accept: header and server cannot fulfil that. HTTP return codes get quite specific when you read the actual description and not just name.

The No-Vary-Search (proposal?)

https://developer.mozilla.org/en-US/docs/Web/HTTP/Reference/...

effectively lets you specify what parts of a query are relevant. So for example

url?a=b&c=d matches url?c=d&a=b in terms of caching

Something I discovered looking back at some old sites: "pages" defined by URL params don't always make it into the Wayback Machine.

Wait until you realize that the difference between path and query string is entirely arbitrary and decided by the server. Query strings should never have existed. They are an implementation detail of CGI webservers that leaked all over everything and now smells really bad.

I dunno, it seems like the fact that we arrived at a fairly standard structure for URL paths that works pretty well is not a bad outcome.

Seems a lot better than the other potential world we could lived in, where paths were a black box and every web server/framework invented their own structure for them.

My next website is going to have the path portion of the URL be a base64 encoded ASN.1 blob.

So long as it starts with a slash, go ahead! See how long it takes for someone to figure it out.

It’s your website. Have fun with it! Do dumb things! :-)

Make sure you use URL-safe base64 or the portions that looks like a path can get mangled

MII//epi

Is converted to MII/epi

That would be broken software.

https://en.wikipedia.org/wiki///

In my current project I use URIs to refer to absolutely any entity in a git(-ish) repo. Files, branches, revisions, diffs, anything. URI turns out to be a really good addressing scheme for everything. Surprise. But the most used and abused element is always the path. Query takes a lot of that mess away. Might have been unmanageable otherwise.

https://github.com/gritzko/beagle

In fact, GitHub URIs are a good example of overusing paths: https://github.com/gritzko/beagle/blob/a7e17290a39250092055f...

  - user gritzko,
  - project beagle, 
  - view blob, 
  - commit a7e17290a39250092055fcda5ae7015868dabdb4, 
  - file path VERBS.md

... all concatenated indiscriminately.

That’s not an indiscriminate hierarchy.

Grouping data by user is common and normal in computing: /home laid precedent decades ago.

Project directories are an extremely common grouping within a user’s work sets. Yeah, some of us just dump random files in $HOME, but this is still a sensible tier two path component.

The choice to make ‘view metadata-wrapped content in browser HTML output’ the default rather than ‘view raw file contents’ the default is legitimate for their usage. One could argue that using custom http headers would be preferable to a path element (to the exclusion of JavaScript being able to access them, iirc?) or that the path element blob should be moved into the domain component or should prefix rather than suffix the operands; all valid choices, but none implicitly better or worse here.

Object hash is obviously mandatory for git permalinks, and is perhaps the only mandatory component here. (But notably, that’s not the same as a commit hash.) However, such paths could arguably be interpreted as maximally user-hostile.

File path, interestingly enough, is completely disposable if one refers to a specific result object hash within a commit, but if the prior object hash was required to be a commit, then this is a valid unique identifier for the filesystem-tree contents of that commit. You could use the object hash instead of the full path within the commit hash, but that’s a pretty user-hostile way to go about this.

So, then, which part of the ordering and path selections do you consider indiscriminate, and why?

actually, instead of the object hash, you could also use the commit-hash. then the filename would be mandatory, but the url would be more readable and usable: give me the file VERBS.md as it is at commit <hash>

But the path misses param names (or types?). E.g who said the hex-encoded part is a commit hash? Maybe it's a tree hash, or just weird ref.

Query strings are more verbose as force to give each param a name.

Back in the day there was an attempt to introduce "matrix URIs" as a more structured alternative to query strings: https://www.w3.org/DesignIssues/MatrixURIs.html

Of course there's nothing to stop you using URIs like this (I think Angular does, or did at one point?) but I don't think the rules for relative matrix URIs were ever figured out and standardised, so browsers don't do anything useful with them.

what would be a better way of doing that? i am not disagreeing, but i just can't think of any way to improve on this. put everything into the query part? i prefer to use the query only for optional arguments. in this example the blob argument is the only thing that doesn't fit in my opinion.

Every object in git (commit, tree, revision of a single file) has a hash that is guaranteed unique within a repository (otherwise many more things than a web UI would break) and likely also globally. I can understand wanting to isolate repositories to prevent hash collisions from causing problems, but within a repo everything has a universally unique ID.

edit: for instance, that specific VERBS.md is represented by the blob 3b9a46854589abb305ea33360f6f6d8634649108.

Not entirely arbitrary - forms that use the GET method instead of POST will append form values as query params.

For sites without Javascript, it's great for things like search boxes, tables with sorting/filtering, etc. instead of POST, since it preserves your query in the URL.

https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/...

It has always amazed me how much trouble the SPA folks are willing to go to in order to slowly rebuild just normal boring URLs with querystrings because users demand deep linking and back buttons and the like.

Or you could accept that you're probably going to need a round trip to the server and use a normal URL and it's fine.

For all but the absolute biggest websites in the world, anyhow. At Facebook or Google scale yeah it's needed.

Nothing you said here is correct. Paths, query strings, and fragments are all well defined entities. https://datatracker.ietf.org/doc/html/rfc3986#section-3.3

It’s a string between ? and # isn’t well defined. Or it is and it says very little.

Query strings existed before CGI did, and the way they're defined to be filled in from web forms is quite useful; I wouldn't want to need Javascript to fit that into path format. There's nothing wrong about having things decided by the server; I don't get that part of your argument at all.

Maybe dumb question: how does the server “decide” anything other than what file to serve? Today we have many choices but back in the day CGI was the first standard way to do it.

So yes query parameters existed before CGI but to use them you had to hack your server to do something with them (iirc NCSA web servers had some magic hacks for queries). CGI drove standardization.

    func specialHandler(w http.ResponseWriter, r *http.Request) {
 if time.Now().Weekday() == time.Tuesday {
  http.NotFound(w, r)
  return
 }

     fmt.Fprintln(w, "server made a decision")
    }

Your server can make decisions however you program it to, you know? It's just software.

Forgive the phone-posting.

and what server software is running this code in 1995?

CL-HTTP or AOLserver

TCP has been around a long time. Listen, read, send, you're good to go. It's just software so you can make it do anything.

But you're asking about the relationship between popular primarily file serving servers like Apache and their relationship to high level code to create custom responses? Yeah, CGI was the first big standard there that I remember, though it was a bit before my time. But that's only one possible architecture.

These days, most web apps have the web server built in, and so the custom code you're writing works with the full request directly. There may be a lightweight web server in front (or multiple), like nginx, to manage connections, but they will largely just proxy the whole thing through.

I was responding to:

> Query strings existed before CGI did… There's nothing wrong about having things decided by the server

Sure, but there is also no standard for how to format/parse the query string. And also no server plugin frameworks. So you are inventing your own standard and extending some HTTP server for which you have source. Until CGI forces a standard, bad as it might be; it’s a common ground.

It's arbitrary to a degree like the difference between using an attribute or child element in XML, but it's not entirely arbitrary. If you want to include data in the URL that's not part of the hierarchy of the path, query strings are good for that.

How do you figure?

Paths are hierarchical; query strings are name/value.

(Note I speak of common usage.)

You can create a different convention, but that one is pretty dang useful.

Whatwg is for html, try the IEEE http rfcs

The IEEE rfcs does define a spot for the query string, but doesn't really say what to do with it.

https://datatracker.ietf.org/doc/html/rfc3986#section-3.4

Try 1866 and 1867

Html is relevant historically as that syntax comes from forms. It was historically a sort of API between the browser client and the server, so yeah.

But it's pretty well defined since 1995

So my understanding is, he is annoyed that other website adds a query string such as "?ref=origin.com" to links pointing to authors website.

How does this benefit the other website? How does this hurt the authors website?

I am completely confused about the behavior of both side here.

I get that when I run an ad-campaing I want google to add a utm-query string, so I can track which campaign users arrived from - but then the origin and the destination are working together. Here the origin just adds stuff for no reason. Why?

It's marketing for the origin site. The line of thought is that the author sees significant traffic from xyz.com in the ref query string, and considers advertising or partnering with the origin site.

Honestly, it is quite useful for niche/startup sites. I have been on both ends of conversations that began from seeing these in web analytics (as someone that saw incoming traffic from a site and reached out, and as someone that received contact from a site I linked to) - and both times it ended in a mutually beneficial partnership.

I can understand the privacy argument to some degree, but it provides no more information than the standard Referer header (and if you use analytics like Simple Analytics/Plausible, it is a lot more visible).

> sees significant traffic from xyz.com in the ref query string, and considers advertising

Why? Already getting traffic for free.

You never ran a website for profit, have you? Knowing who is sending you traffic lets you decide whether your marketing is working, where you should write your blog posts to get more views, etc. This has been the way the web works for decades.

I’m broadly anti-tracking: it’s generally against the interests of the individual.

Query string additions are commonly used to track things. You can see that lots of people don’t want that by the existence of Firefox features like “copy clean link” and Extended Tracking Protection which proactively strips some like UTM parameters.

Some sites happily participate in what I will glibly call the tracking economy. They may benefit because the recipient will see in their logs that lots of people are coming from their site, and do something that helps their site because of that.

My rejecting query strings is a simple form of protest against that system.

I understand being for privacy, but on the flip side, information about you can result in a better experience. E.g. in the case of tracking where a person comes from, that can help those two websites improve by coordinating with each other in some way. Or your ads might actually show you something you didn't know you existed that you end up buying. That's probably better than seeing ads you likely have zero interest in. I'll admit it's creepy when an ad is incredibly tuned to your recent internet activity, though.

Textbook marketing speak: “Don't you want more relevant ads?”.

It assumes that “ads” = useful information, but that's rare at best. Most ads focus on stealing your attention and creating a fear of missing out. NordVPN isn't educating you. They just manufacture a need and then hope that you won't invest time in researching a better option.

Why would I give them more leverage to do that?

Is it that rare? Sure, there's no advertising profile for "hates VPN ads" but eg an adult male doesn't want ads for women's period pain medication and similarly an adult woman doesn't want ads for male testosterone or other male-coded enhancements ads. Then you get into niche interests like fishing or sewing or 3d printing.

You're conflating correctly targeted ads and useful information.

If you sell gambling ads to an addicted gambler, the gambler doesn't get useful information.

Niche interests might get a pass. But then again: if I’m getting an ad for a 3D printing product on a 3D printing review site, its very likely that the advertised product wasn’t actually the best and is just artificially pushed on me.

I genuinely would rather see ads for products I might like yet do not know exist instead of purely random ads. I don't understand why a person wouldn't.

I started writing a follow-up half an hour before you posted, since the parent comment has been unusually highly voted. I dropped it again, but now you’ve given me something to respond to.

I say I’m broadly anti-tracking. I think it’s clear by this point to anyone with a skerrick of wisdom that the logical extreme of tracking is bad. But for a long way it seems innocuous. So how far do you go before declaring it unacceptable?

I hold myself to higher standards than I will hold others. For myself, I find it is most reliable not to start. I will occasionally show others this attitude or try mildly to recommend it, but largely that’s up to them.

I hate ads (in which I include billboards, newspaper ads, display ads, search ads, Facebook ads, sponsored posts, and a whole lot more; but not first-party stuff, and if it includes content not directly related to what you’re selling, it will probably be exempt too). I block ads as far as I can. Therefore I will never foist ads on others: t’were hypocrisy to do otherwise.

I like clean URLs and also hate precise tracking. Therefore if I send a newsletter-style email, it will include plain URLs that don’t track. So I can’t measure “campaign success”? C’est la vie. I’ll survive. I don’t want to scale anyway. I want people to respond by email, and respond to them. People are what matter in this life, even if I find computers far easier to deal with.

I dislike tracking where it is not functionally necessary. I confess that I haven’t yet taken this to the logical extreme of not recording server logs at all. I won’t ask clients what they are and where they’re from, but if they tell me, I will still record it for now, I guess. I might go more extreme on this in the future. But when some third party tries to force others to tell things unwittingly… that I don’t like.

What would you consider the "extreme of tracking?" Anyway, I feel like we're dealing with Sorites paradox here, which is something my brother always freaks out over whenever there is a continuum of choices in something like a political argument. E.g. "Tax the rich" → "What is rich?!?" When someone says, "Tax the rich," they generally mean people with dozens of millions in net worth growing fast all the way up to the people who have hundreds of billions. I don't understand why that conversation repeatedly comes up with him. He's also into the slippery slope where, if you like the idea of a wealth tax, he cries bloody murder since income tax started out only on the richest salaries in the nation. So he reasons that... everyone will eventually have a wealth tax instead of it just being the people with billions of dollars who have paid like 1% tax per year due to their net worth being tied up in unsold stocks.

So if I'm going to pick your brain, what would a realistic extreme of tracking look like? You have to log in with your state-issued identity to enter the internet, and systems track absolutely everything you do? Sure, that sounds bad. I can admit that. But I don't feel like having a "?=example.com" is anywhere near that, if you get what I mean.

Do you find it moral to block ads? By that point, you are using free services without paying as intended. Or do you mean you buy YT premium and Twitch Turbo and Spotify premium and all those monthly bills that both block ads while sustaining the services you apparently enjoy using?

> C’est la vie. I’ll survive.

Will you? You made a widget and you're trying to sell it. You've taken out a second mortgage on your house, and used up all your savings. You're down to your last $10,000. If you don't start making sales soon, you're sunk. Where do you spend that $10,000? Facebook? Instagram? Google? TikTok? If you don't know where your leads are coming from, how do you know where to spend your marketing budget?

I can’t imagine myself ending up in your scenario: I’m not interested in unbridled growth, if I sell things I want to be able to at least broadly know my customers, so I’ll know where they are in that situation. Besides which I’m never going to be doing that kind of advertising, cost-per-click and such—I consider it a blight on society wholly devoid of virtue, so I’ll not be a hypocrite and use it for my own gain.

It’s an unconventional pathway, but I have complete faith that it will work out. Not always in the ways I expect or prefer, but it will work out.

(Even humanly speaking, your protagonist sounds incompetent—just throwing money at marketing is very ineffective, you want to target and approach different platforms differently, and if you don’t know which of Facebook, Instagram, Google or TikTok will be the best venue to spend your last coins, I think you deserve to fail.)

More generally, these three snippets from the Bible accurately convey my attitude:

> The LORD will provide. — Genesis 22:14

> I have been young, and now am old, yet I have not seen the righteous forsaken, nor his children begging for bread. — Psalm 37:25

> We walk by faith, not by sight. — 2 Corinthians 5:7

This genuinely is how I try to live my life. I’ve seen it work in my parents before me and in a few others’ lives, in anecdotes of grand- and great-grandparents and beyond. (It’s even why I, an Australian by birth, now live in India.)

If you have a popular website and you add that parameter the target easily sees who sends them traffic, that could be the base of sponsorships / affiliate arrangements for example.

But you see that anyway from access.log or whatever your server supports and dashboard/analytics shows it anyway? What's the benefit of adding origin to query string?

Not always.

Some web pages don't send referrers by making all links rel="noreferrer". Mastodon used to do this by default, though now they've changed their stance.

Links opened from non-browser apps don't have any referrer information either. E.g. if somebody shares your link on iMessage, WhatsApp, or Telegram.

Email clients may also strip out referrers, but I'm not entirely sure about this one.

If people read your work via RSS readers, you'll almost certainly not get any referrers. Unless it's a web-based reader like Feedly.

My website gets a lot of traffic marked as "Direct / None" by Plausible. I suspect this is traffic from RSS readers or Mastodon, but I can't be sure. A few times I've considered adding a "?ref=RSS" to all URLs served to RSS readers and "?ref=Mastodon" to everything I post on Mastodon. But like the author of this post, I feel uncomfortable tracking my readers like this.

I see where (both of you) are coming from, and I'm very privacy conscious (=paranoid) myself, but in this case, as a user, I wouldn't actually mind. It seems to me you would be tracking flows instead of users, which is fine in my book. Now, including Google fonts on every page, using their tag manager, analytics, captcha... That gives me the creeps. Waaay too much information about each and every user. But generic origin query params? Yeah, ok. :shrug:

Adblockers like umatrix have options like "Spoof Referer header". I have this setting enabled, so adding tracking query strings to URLs would go against my user preference.

I agree with you here, this is an odd reaction to a non-problem.

A real-life scenario would be to refuse your snail mail because someone added an extra line in your address.

The only plausible reason would be to avoid polluting the data (like faking the ref= for marketing purpose) but that would assume you are already tracking the ref value for other services, so in a way, you either need it or not, but you can't have both.

If you don't actively track query strings, having them or not has no impact.

> It is a small, decentralised, self-hosted web console that lets visitors to your website explore interesting websites and pages recommended by a community of independent personal website owners.

Back in the Stone Age, we called these “Webrings,” but they weren’t as fancy.

One of the issues that I faced, while developing an open-source application framework, was that hosting that used FastCGI, would not honor Auth headers, so I was forced to pass the tokens in the query. It sucked, because that makes copy/paste of the Web address a real problem. It would often contain tokens. I guess maybe this has been fixed?

In the backends that I control, and aren’t required to make available to any and all, I use headers.

> an open-source application framework, was that hosting that used FastCGI, would not honor Auth headers

So you were writing your application as a fcgi-app, and (e.g.) Apache was bungling Auth headers? Can you expand on this? Curious about the technical detail of (I guess) PARAM records not actually giving you what you expect?

I don’t remember, exactly. Long time ago (I stepped away from that project many years ago).

I just remember the auth headers never showing up in the $_SERVER global (it was a PHP app). This was what I was told was the issue. They made it sound like it was well-known.

This is because of a deeply annoying default in Apache, where for "security reasons" the underlying script doesn't get to see auth details that might already be handled by Apache. At some point they added the CGIPassAuth directive[1] but all kinds of other workarounds are floating around on the internet.

[1]: https://httpd.apache.org/docs/2.4/en/mod/core.html#cgipassau...

>So I’ve decided to try a blanket ban for this site: no unauthorised query strings.

His site returns (I think incorrectly) a 414 if a request includes a query string. If this protest is meant to advocate for the user, who presumably wasn't able to manage that string in the first place, why would you penalize them for it being there?

Why not just use it as a cue to tell users how they can make this decision themselves (e.g. through browser tools)?

"You could argue that I’m abusing 414 URI Too Long. I respond that it’s funnier this way. Other options I considered were:

    400 Bad Request, the generic client error code, which is correct but boring;

    402 Payment Required, and honestly if you want to pay me to make a particular URL with query string work, I’m open to it;

    404 Not Found, but it’s too likely to have side effects, and it doesn’t convey the idea that the request was malformed, which is what I’m going for; and

    303 See Other with no Location header, which is extremely uncommon these days but legitimate. Or at least it was in RFC 2616 (“The different URI SHOULD be given by the Location field in the response”), but it was reworded in 7231 and 9110 in a way that assumes the presence of a Location header (“… as indicated by a URI in the Location header field”), while 301, 302, 307 and 308 say “the server SHOULD generate a Location header field”. Well, I reckon See Other with no Location header is fair enough. But URI Too Long was funnier."

https://chrismorgan.info/no-query-strings?foo

I don't think it's an abuse, RFC9110 defines 414 as a response for "refusing to service the request because the target URI is longer than the server is willing to interpret". Since adding a query string involves only adding characters, this seems fine; there's no stipulation as far as I can tell that all pages a server hosts must adhere to the same length. I'd be curious if any well-known clients interpret it that way though, and make caching decisions based on it. As far as I know, they shouldn't.

Obviously it's against the spirit of the thing, but I don't think it's wrong per-se.

If the goal is to be misleading, but technically correct, it hits the bullseye

When the goal is "the funniest way", I think that's a hit :)

I reckon it is still an abuse. I am willing to interpret longer target URIs… so long as they don’t contain a question mark. /no-query-strings is longer than /?.

The standard doesn't say that you must accept all URIs up to a certain length. You're allowed to decide, based on context, what is "too long".

That is to say, you're allowed to have a double standard. And I love this sort of stuff, thanks for sharing.

You could also redirect to the url with the query string dropped.

But then it’s barely a protest.

Also from the 414 page:

>Complain to whoever gave you the bad link, and ask them to stop modifying URLs, because it’s bad manners.

It's ironic that an error response so blatantly violating the robustness principle is throwing shade about bad manners.

Opinions vary on how good an idea the robustness principle is. That is why, for example, the XML standard requires a conforming validator to throw an error on invalid XML.

In our modern world, the robustness principle has become an invitation to security bugs, and vendor lock-in. Edge cases snuck through one system on robustness, then trigger unfortunate behavior when they hit a different system. Two systems tried to do something reasonable on an ambiguous case, but did it differently, leading to software that works on one, failing to work on the other.

I generally agree, but I don't think XML is the best example. Getting HTML out of XML is considered to have been the right move isn't it? I was pro-XHTML2 at the time but in retrospect, have we suffered much for not sending webpage validation errors to end users?

Once people have gotten used to not having to conform, forcing them to conform is an uphill battle. Doubly so when, as happened with Microsoft and IE, the vendors would like to encourage vendor lock-in. The only time to reasonably do it is at the start.

That said, we are paying a huge complexity cost due to our efforts to allow nonconforming pages. This complexity is widely abused by malicious actors. See, for instance, https://cheatsheetseries.owasp.org/cheatsheets/XSS_Filter_Ev... for ways in which attackers try to bypass security filters. A lot of it is only possible because of this unnecessary complexity.

But, this is robust? I mean it's pretty clearly stating that you are visiting an unsupported URL. It provides direction on what to do about it to the user. It does not crash the browser or the server. In pretty much every dimension this is highly robust.

The robustness principle is itself bad manners, in plenty of contexts. If I deliver packages by throwing them at the customer, I really want a customer to tell me "hey, don't throw packages at me!" before I attempt to lob something fragile and breakable, or something heavy at someone fragile and breakable. Otherwise, how am I supposed to learn that I'm doing anything wrong?

This is the point this has delved into internet crankery.

No, it's a fairly uncontroversial take. See https://en.wikipedia.org/wiki/Robustness_principle#Criticism and the "See also" section.

The robustness principle is a terrible idea. Because people follow it, we have broken stuff all over the place.

The robustness principle was a mistake. The attitude it promulgated is a big reason why interoperability is so difficult.

It's been years but I seem to remember there was a version of PLSQL server pages that would return 500 if you tried to pass in an unknown query string.

> You could argue that I’m abusing 414 URI Too Long. I respond that it’s funnier this way. Other options I considered were:

Another option to consider is "418 I'm a teapot": teapots usually also don't support query strings

Just straight "400" ("Bad Request") or "403" ("Forbidden") would also probably be defensible. Odd that there aren't any error response codes specific to URI parameters.

Several options which seem like they might be appropriate aren't on close examination:

- "406" ("Not Acceptable") which is based on content-negotiation headers.

- "409" ("Conflict") which is largely for WebDAV requests.

- Others such as 411, 422, and 431 are also for specific conditions which aren't relevant here.

- 300 or 500 errors are inappropriate as this isn't a relocation or server-side failure, it's a client-side request problem.

Teapot or too long seem best bets.

I think either 400 or 404 would be fine. 400 because the request isn't in the expected format, 404 because a resource with that query string doesn't exist.

I shy from 404 because the resource itself may be valid, it's the query parameters which aren't acceptable. Returning 404 could result in some remote processes, particularly Web crawlers, incorrectly marking the base resource as unavailable, which may not be desirable.

Just fire off a 200 OK with text body of "499 Bad query string"

Im not making this up btw. A old NOC I woeked at emitted every error as 200 OK with the body message with the real error. They were a real shitshow.

> 409" ("Conflict") which is largely for WebDAV requests.

I’ve always used them in API servers when a client was POSTing to create a duplicate of a unique item.

I'm willing to pay them $1 for a contact guaranteeing that they won't service such requests. That would make 451 the most appropriate.

Of course they do. For example you can lower a string from the top to query the fill level. Or you can wrap a string around the pot to query the circumference.

But I’m not a teapot. I despise tea.

You would be a very sad teapot then. :(

The tone of this and Chris's post gives me the impression that it's harmful to include these query parameters, but I don't understand how. Could someone elucidate me? I understand it can mangle some URLs and that's good enough reason not do it, but even then it seems like a minor incovenience.

Three angles:

The technical purist: you’re modifying a URL in a way that, while in line with accepted custom, is technically incorrect. URLs should (the least effective type of should) basically be treated as opaque.

Social: it’s tracking stuff, sibling comment trees are good, I won’t reiterate.

Clutter: it’s getting in the way of the bit you should care about, and contributing to normal people no longer caring about URLs because they’re too hard, too complex.

You can read some of the issues people have had with this by reading up on the http referer header: https://en.wikipedia.org/wiki/HTTP_referer

There are a lot of reasons I might not want a site to know where I came from to get to their site. It is basically sharing your browsing history with the site you are visiting.

Because of this, there have been a lot of updates to the http referer header, with restrictions on when it is sent, and an ability to opt out of the feature entirely.

Adding a url parameter with the same information bypasses any of these existing rules and ability to opt out. They should just use the standard.

If I send out an email campaign, I can't use custom http headers to know that a user arrived from the newsletter.

If you are sending out an email, you can use whatever url form you like?

This is talking about links to third party sites, not your own.

use a unique url for each email

As your reader, I might not actually want you to know.

Do you really need to? Basic statistics will tell you if the email campaign had any significant effect on site visits.

If I release a video and send an email newsletter at the same time, which one caused the traffic increase? Should I invest in making more videos of sending more emails?

If you insist on knowing, include a different url in both that goes to the same place and use your damn server logs. You don’t need google analytics and whatever.

Isn't putting in a different query string "including a different url that goes to the same place"?

Isn't this functionally the exact same?

presumably you control the urls you are sending in the email. As a result if you want to use query strings that's fine. The issue only arises when you use query strings to implement tracking on someone else's site instead.

There is no reason at all.

You could simply throw the information away.

It's a ridiculously extreme stance and lacks proper explanation how this will lead to a better web.

It may be ridiculous to some, but Chris is totally right - it’s his website and he can do what he wants with it!

Oh, I have a couple - the users did not agree on being tracked (these query params are tracking information), and the site administrator does not want incoming traffic to be tracked. I know the latter can be hard to understand, but I for example sure as hell do not want to have any info in my logs that can be used to harm my users.

On a more personal note, I hate it when I go to copy a link to send via a message, and the tracking code glued onto it is twice as long as original URL... I either have to fiddle around with it to clean it up or leave the person I sent it to to wonder wtf am I on about with a screenful of random characters...

So it's violating users' privacy, it's shit UX, and on top of that, nobody asked for it...

>(these query params are tracking information)

Query strings are useful for way more than just tracking. Saving and servicing search queries is a way more common use case. So assuming it's only useful for tracking is very misleading.

Query strings are probably the least invasive tracking. They are transparent, obvious, and anonymous. Users are free to strip out and edit query strings if they don't want them.

More to the point, I can essentially do the same thing with HTTP routing - create an infinite number of unique URLs for tracking purposes. In that regard calling out query strings specifically for essentially the same thing but more transparently seems like splitting hairs.

Yeah I do not see an alternative way to easily copy paste links with things like filter settings saved.

Filters especially make sense as query params as they are non sequential but still visually readable as to what they do.

URL slugs make sense for sequential pages that are hierarchical but make no sense for non hierarchical data/routes.

Services can force tracking into links by encoding the whole url into a shortlink that makes it impossible to just remove the tracking alone as everything is encoded into a shorter non editable string.

> Query strings are probably the least invasive tracking. They are transparent, obvious, and anonymous.

They're not necessarily anonymous. utm=Google.com is, but s=abcdefg, where abcdefg is a hash of the specific user that generated that link, identifies to the site the specific user the link was shared from.

Thank you for explaining to me that query parameters can be used for other purposes apart from tracking. The articles in question though, are railing against query parameters being abused for tracking purposes - passing referers (sic) and UTM by adding them to URLs of sites that neither process them, nor want them.

Referral query strings are not for tracking though. The person putting them on the links gets nothing out of them. There is no PII being shared. They are purely added out of courtesy.

If I am handing out maps to your address, letting people know who is publishing the map is generally a good thing.

This is like saying having a return to sender address on mail is an invasion of privacy.

What's interesting is that none of these sites have a "search" feature. Which is an important accessibility feature and a clear and legitimate use case for a query string.

> If I ever start using any query strings, I’ll allow only known parameters.

They aren't saying the concept of query strings are bad, They're saying unsolicited query strings during referal are the issue.

My website has search without a query string: https://www.jeremykun.com/

It looks like you’re just eschewing URLs altogether? URLs are an important accessibility feature, &c.

Nice blog, but that's user hostile for a lot of products with search features. People share links pretty regularly.

Nothing stops someone from sharing a link to the blog or any individual page...

Not all software is a blog.

Since the original source hadn't had a discussion on HN yet, I've put that link (https://chrismorgan.info/no-query-strings) at the top and moved the response link (https://susam.net/no-query-strings.html) to the toptext.

Both are good but it seems fair to give priority to the original.

  > It’s my website: I can do what I want with it.
  >
  > And you can do what you want with yours!

This part in particular stood out to me, and I liked it very much.

Maybe an alternative would be to inconvenience people following such links still, but somewhat less.

Instead of responding with an error, give a page that states “The link you followed to get here appears to have had some tracking gubbins added, in case you are a bot following arbitrary links, and/or using random URL additions to look like a more organic visit, please wait while we run a little PoW automaton deterrent before passing you on to the page you are looking for.” then do a little busy work (perhaps a real PoW thingy) before redirecting. Or maybe don't redirect directly, just output the unadorned URL for the user to click (and pass on to others). This won't stop the extra gubbins being added of course, but neither will the error and this inconveniences potential readers less.

This basically boils down to "reject any incoming links from facebook, pinterest, chatgpt, linkedin, twitter, reddit, youtube, etc". I guess sure? There's a once-famous guy who shows goatse to all referring links from HN. I guess if you get enough traffic that you can pick which sources you want to allow, that's a good problem to have.

How much do platforms mangle people’s links? Figured I’d check the ones you mention. (I was actually mildly surprised to be able to find examples in all of them without needing to log in once. I thought LinkedIn and ChatGPT wouldn’t.)

Facebook: no.

Pinterest: ?utm_source=Pinterest&utm_medium=organic.

ChatGPT: ?utm_source=chatgpt.com. (Aside: wow it’s confidently and atrociously wrong if you ask it about me. Ask it just vaguely enough, and it hallucinates someone clearly inspired by me, but who has done a whole lot of stuff that I haven’t. Ask it more precisely about me, and it gets all kinds of details wrong still. I feel further vindicated in hating this stuff. You made me use ChatGPT for the very first time.)

LinkedIn: no.

Twitter: no.

Reddit: no.

YouTube: no.

> if you get enough traffic that you can pick which sources you want to allow, that's a good problem to have.

Nah, I just don’t care about them. It’s my place, I’m doing things on my own terms. Should I discover it to be causing me problems, I’ll burn that bridge when I come to it.

Facebook does, I'm not sure why it didn't in your case. It adds an "fbclid" parameter that is quite long. I just tried it to confirm.

Edit: Perhaps it only mangles links for logged-in users? That raises the possibility that some of the others may also only affect logged-in users.

(Trying with other ones I'm logged in on: Reddit doesn't mangle (obviously), Twitter doesn't mangle.)

As far as I know, platforms like YouTube and Twitter prefers using their own "link shorteners" (t.co etc) to track clicks and other metrics.

"wander console" sounds like they're just web rings re-invented. In the era of forced feeds by giant corporations which consist of the things they want you to see, I've wondered if this old idea would make a comeback. Human curated content from trusted people seems like the only way forward.

FTA: It is also a bit like web rings except that the community network is not restricted to being a cycle; it is a graph and it is flexible.

Is it not a random walk? Might sound pedantic but if there is graph structure I am interested.

I'll start with the clarification that the moderators have changed the URL of the original post from <https://susam.net/no-query-strings.html> to <https://chrismorgan.info/no-query-strings>. Hopefully, this will prevent any confusion about why we are discussing random walks in a post about query strings. Now let me answer your question.

> Is it not a random walk? Might sound pedantic but if there is graph structure I am interested.

The network is a directed graph. Every Wander Console declares a few other consoles as its neighbours. The person setting up the console decides who they want to list as their neighbours. So if we call the network graph X, then the set of vertices is:

  V(X) = the set of all URLs that point to Wander Consoles

and the set of directed edges is:

  E(X) = {(u, v) in V(X) : u declares v as its neighbour}

The traversal between consoles is not strictly a random walk. If I could call it something, I would call it randomised graph exploration with frontier expansion. On each click of the 'Wander' button, the tool picks one console at random from the set of discovered consoles and visits that console. It then fetches the neighbours declared by that console and adds any newly discovered consoles to the set.

The difference from a random walk is that the next console is not chosen from the neighbours of the last visited console. It is chosen from the whole set of consoles discovered so far. In other words, each click expands the known part of the graph, but the console used for that expansion is selected randomly from all discovered consoles, not just from the last console visited.

Oh cool, I love this approach. Randomized graph traversal but ever visited node is a fast travel station. Great way to avoid running into dead ends.

While I don't take the author's hard stance, I do hate gratuitous query params that result in links that are thousands of characters long.

I use this bookmarklet to strip query params before sharing a link:

    javascript:(()=>navigator.clipboard.writeText(location.origin+location.pathname))();

This corrupts a URL like:

  https://example.com/?p=20&utm_source=spam

to:

  https://example.com/

when in fact we want the following:

  https://example.com/?p=20

A possible improvement can be:

  javascript:(()=>{const u=new URL(location.href);[...u.searchParams.keys()].forEach(k=>{if(k.startsWith('utm_')){u.searchParams.delete(k)}});navigator.clipboard.writeText(u.href)})();

We have different goals. I do this to strip unnecessary junk off of product page links I'm going to share, and your version now does nothing to (for example) Amazon PDP links. I understand it doesn't work for every kind of link and that's fine.

If I did want to support paginated/search pages, I would allowlist only `p` and `q` rather than specifically blocking one type of analytics.

Yes, that's fair. Indeed my so called improvement requires continual maintenance to add new parameters to the blocklist, which somewhat defeats what is perhaps the main purpose: convenience.

While it is clear that your solution works well for you and would probably work for me too for most types of 'bad' URLs, I am noting down an allowlist based solution for my own satisfaction and future reference:

  javascript:(()=>{const u=new URL(location.href);[...u.searchParams.keys()].forEach(k=>{if(!['p','q'].includes(k)){u.searchParams.delete(k)}});navigator.clipboard.writeText(u.href)})();

Tested with the following URL:

  https://duckduckgo.com/?ia=web&origin=funnel_home_website&t=h_&q=hello+world&chip-select=search

The bookmarklet copies this cleaned version of the URL:

  https://duckduckgo.com/?q=hello+world

This is great! I love one-liners that are readable like this. This made me wonder if there are any extensions that run a script on every page load for a web browser. I'm currently experimenting with userscript managers and plan on including your code as an additional security measure against tracking.

There’s nothing ruder in hypertext etiquette than giving someone a link to navigate to someone else’s HTTP server, where you have manipulated that URL in some way unsanctioned by the server you are sending them to.

You can’t just send arbitrary query string parameters to a server and assume they will just ignore them. Just like you can’t just remove query string parameters and assume the URL will work.

In fact, you usually can just send arbitrary query string parameters to a server - that's why the behavior is so common, and often useful.

Most sites don't mind or break, some sites get value from the behavior in ways hard to replicate in other ways – and those sites that don't like such additions can easily ignore them. And a few lines of code will work better than ineffectually appealing to manners, when the freedom of the web's form of hypertext, and protocols, gives the outlink authors full freedom to craft URLs (and thus requests) however they like.

Crafting outbound links with your own additions and handing them out to visitors to your site is similar to the practice of writing someone’s phone number on the door of a bathroom cubicle with ‘for a good time call:’ written above it.

You’re handing out someone elses’s contact details, but giving the person you hand them to a completely fabricated expectation for how the interaction will go.

My use case for this is making separate bookmarks in different folders for a single URL:

Example.com/interesting -> bookmark folder one

Example.com/interesting?dummy=t -> bookmark folder two

Use #fragment identifiers then

edit: not true https://news.ycombinator.com/item?id=48077990

"I don’t like people adding tracking stuff to URLs" and "You abuse your users by adding that to the link" and "no unauthorised query strings" and "At present I don’t use any query strings" but for some reason ?igsh, which i'm pretty sure is an instagram tracking parameter, is allowed. weird

?igsh doesn't get through for me, and I don't see any links on the page including it.

oh, it's uBlock Origin (non-lite) removing it without telling me at all. retracted

I love the hilarious output. He even coded in a special case for just a question mark without any params:

https://chrismorgan.info/no-query-strings?

Never have I seen such a sassy web server

great spot!

I noticed that his server also doesn't accept URLs ending is a single `/`: https://chrismorgan.info/no-query-strings/

But instead of the banned query strings message, it just returns a very sassy not-a-404 page. Once again, this is violating a common convention, but there's nothing in the HTTP spec that requires treating these URLs the same. Similarly the site also 404s when you add extra slashes like https://chrismorgan.info///no-query-strings

digression: I love trying "domain.com//" on various sites. Occasionally it'll trigger weird errors like a 502 or 500.

You’re misreading a couple of things. There’s no violation of common convention where you’re pointing.

Where dealing with static file servers:

For URLs that are supposed to include a trailing slash and the server will find that directory and serve its index.html: it’s customary, though not ubiquitous, to redirect from no-slash to slash. (Some, including popular commercial services, serve the index.html file instead of redirecting to add the slash. This is extremely wrong because it changes the meaning of relative URLs.)

But the other way round is not common.

My URLs don’t include a file extension, and I think that’s influencing your perception into thinking no-query-strings is logically a directory name. But it’s not, it’s logically a file name, just with the .html removed as unnecessary.

Take https://susam.net/no-query-strings.html as an example; Susam is more clearly just serving from a file system than I am, and leaves the “.html” file extension in the URL. Do you expect https://susam.net/no-query-strings.html/ to work? I hope not. It’s a 404, just as I’d expect, because there is no directory with that name.

> not-a-404 page

No, that’s a 404, just a plain old boring 404, same as any other. In fact, it’s the same 404 page I’ve been using since 2019, just with dark mode support added.

> extra slashes

Ah, now for that I had to go out of my way, because Caddy misbehaves out of the box: https://chrismorgan.info/Caddyfile#:~:text=%40has%5Fmultiple...

> digression: I love trying "domain.com//" on various sites.

Closely related is adding the trailing dot of a fully-qualified domain name: https://example.com./. I didn’t remember to try this on my new site, but it turns out Caddy won’t talk at https://chrismorgan.info./, so that’s probably good.

I've seen a lot of headaches caused by that trailing dot in the past! IIRC Caddy specifically said they wouldn't support that, leading to a medium-sized flamewar in an issue or PR.

Clearly the trailing dot is theoretically highly appropriate, but it seems like we're so far down the opposite path that we should all agree that every domain, sadly, should always be fully qualified.

I also contemplated making it serve the content of the original page, but with every . and ! turned to ? (or maybe ! changed to ‽). But I decided that was too hard at present. I might revisit it later, there’s a stage in my plans where that will be easier to implement.

You exposed a (useful) quirk in HN's URL parsing, though... :p

<https://chrismorgan.info/no-query-strings?>

Query strings do have uses (such as for searching files and some other kind of dynamic files), but you shouldn't add them to URLs that should not expect them. So, I agree that they would be right to refuse requests with UTM and other stuff added like that.

I think 404 probably makes the most sense as the response if a query string is not expected but is present anyways, although 400 might also be suitable.

Adding query strings is one of those things that I think a lot of sites could get away with more easily if they were reasonable about it.

A link that is "https:// web.site" is fine.

A link that is "https:// web.site?via=another.site" is fine.

A link that is "https:// web.site?fbm=avddjur5rdcbbdehy63edjur5rdcbbdehy63ednddjur5rdcbbdehy63ednddjur5rdehy63ednddjur5rdcbbdehy63ednddjur5rdcbbdehy63edaaaddjur5rdcbbdehy63ednddjur5rdcbbdehy63ednddjur5rdcbbdehy63ednddjur5rdcbbdehy63ednddjur5rdcbbdehy63ednddjur5rdcbbdehy63ednddjur5rdcbbdehy63ednddjur5rdcbbdehy63ednddjur5rdcbbdehy63ednddjur5rdcbbdehy63ednddjur5rdcbbdehy63ednddjur5rdcbbdehy63ednddjur5rdcbbdehy63ednddjur5rdcbbdehy63ednddjur5rdcbbdehy63ednddjur5rdcbbdehy63ednddjur5rdcbbdehy63ednddjur5rdcbbdehy63ednddjur5rdcbbdehy63ednddjur5rdcbbdehy63ednddjur5rdcbbdehy63ednddjur5rdcbbdehy63ednddjur5rdcbbdehy63ednddjur5rdcbbdehy63ednddjur5rdcbbdehy63ednzzddjur5rdcbbdehy63ednddjur5rdcbbdehy63ednddjur5rdcbbdehy63ednddjur5rdcbbdehy63ednddjur5rdcbbdehy63ednddjur5rdcbbdehy63ednddjur5rdcbbdehy63ednddjur5rdcbbdehy63ednddjur5rdcbbdehy63ednddjur5rdcbbdehy63edn"

is annoying as shit and I need to literally apologize to people after sending it if I forget to manually redact the query string. Don't abuse this.

There are addons to remove unnecessary params from the worst offending sites:

https://www.google.com/search?q=clearurls+addon

Thanks for removing the rest on that google link, the one I get after switching to "images" and back to "web" is this monstrosity:

https://www.google.com/search?newwindow=1&sca_esv=8061bd9cb1...

Edit: which luckily and sensibly Hacker News cuts short since it's 463 characters

You can post the string as text (indent by 2+ spaces) to avoid that trimming.

Since the purpose is to show the full URL with trackers and other cruft, that's sensible here:

  https://www.google.com/search?newwindow=1&sca_esv=8061bd9cb19cd450&sxsrf=ANbL-n7S60ZBdf0lh5kQ8RojJdQpnM0S5w:1778353180297&q=clearurls+addon&source=lnms&fbs=ADc_l-aN0CWEZBOHjofHoaMMDiKpeTF8ggB1qASWZfpybz5TQZmqMiWOgtbP_iLwZE3_BsqFrIkjQk30pNpcyOJjgYT1NYhSr_eVWusunSdIYLAa1WWhJm7VPvRsNUkHss5YZDSVhzEth7KnRsP0kwdL-3ylxxDz_j5WL-QtjJdzQePIWAeCwn7532w9WuSzSqnY0V2tn342eEk_wDwxk45MDY_JuA-5CA&sa=X&ved=2ahUKEwjH3uLs8ayUAxUghP0HHVXuOeIQ0pQJegQICxAB&biw=1296&bih=711&dpr=2.22

And yeah, that's pretty awful.

In conclusion, Google must be destroyed.

Yeah I removed the rest of the link as an example of how much cleaner the urls can be with that addon haha. I was being meta

Newer versions of Firefox also have a "Copy Clean Link" option in the right-click menu.

https://support.mozilla.org/en-US/kb/enhanced-tracking-prote...

This is not the first site to do so. A few years back, scarygoround.com started blocking query strings, although it seems to have stopped doing so now. Back then, Facebook had started to add ?fbclid=... to every outgoing link.

"It’s my website: I can do what I want with it. "

Right on! It's so liberating having your own wee corner of the internet.

>Right click a youtube video from the results to copy the URL. I would have liked a short URL ready to share with people in chats, but no, I get: https://www.youtube.com/watch?v=IFfLCuHSZ-U&pp=ygUNcmF0Ym95I...

>Want to share an amazon product on a chat to discuss about it. I would have liked a nice short url that I can copy, instead I get a monstrosity, it forces me to manually select only the id portion of it if I want to share it.

I was just thinking about something like this. Instagram and TikTok are major offenders, not everyone wants their personal info blasted everywhere because they copied a link. It would be great to have an iOS shortcut that automatically removes them, it's something I'm going to look into.

Just referrer policy of strict origin when cross origin gives host level referer (sic) header in most mainstream browsers unless user has configured otherwise right? That’s usually enough for web authors to know what audience they’re appealing to and privacy-maximizers can turn off that header sending.

I've created a bookmarklet that just appends a date query string (?date=05112026) to my current tab's URL. My bookmark manager Raindrop will recognize this as a completely different page, so I can easily create a duplicate entries for the same page. I don't think many people mention it, but Raindrop creates archives of every entry, so I end up with sort of my own personal Wayback Machine. The author has successful thwarted me though.

Referrer is sometimes nice to know. If your site gets a traffic spike from an email newsletter that traffic won't correctly identify the source in the http headers.

No qualms with OP, your site your rules.

This is cool and creative!

It uses 4xx, but not just 400 :)

https://chrismorgan.info/no-query-strings?why=unknown

I love this. I'd rather see bans when you get sent from one of the google search redirect links. I know they want to track the exits... Maybe mess those up!

YouTube is also quite famous with their source identifiers, especially with the short urls, the tracking part is longer then the url I’m trying to share.

I dislike the trend among computer users that query strings == tracking data. They're just one of the many ways a browser request can contain data. They are used for all sorts of things in perfectly valid websites, and it's difficult for me as a developer to just just arbitrarily accept that a certain feature HAS to be used for a certain malicious technique, despite it being common.

With more limited copy-paste functionality, tracking parameters could just as easily be put in the request body. Or a cookie/session data. Or, if you're nasty, you could get everything you want to know out of a user via fingerprinting with very little up-front data at all.

We as users have basically already been collectively pwned, the solution being to use VPNs, anti-tracking scripts/extensions, encryption, and just plain ol 'stop using services that track you'. The preceding are all leagues better for one's privacy than superstitiously chopping up a URL.

Honestly, disallowing other websites from from adding their query strings to your URLs I think is awesome, and I think it makes sense that websites should validate their URLs against their internal APIs only. But, given this was only done for query strings, and not other parts of the request, I still feel like this whole thing establishes more of a taboo than an actual security or privacy guideline.

This url worked fine:

https://chrismorgan.info/no-query-strings#:~:text=So%20I%E2%...

but this one was too long:

https://chrismorgan.info/no-query-strings?a=1

Doh! The part past the # does not go to the sever, so that wasn't a longer URL. How about:

https://chrismorgan.info/%6e%6f-%71%75%65%72%79-%73%74%72%69...

Indeed, that's not a query string! The #, and following text, is a fragment, is client-side only, and isn't the subject of the blogpost. Neither is percent encoding, which is just another way to send the exact same path from your browser to the server.

Note that it has nothing to do with the length of the URL. That's just the error message he's chosen to use, because "4xx stop pissing about with my URLs" doesn't exist in the spec.

> percent encoding, which is just another way to send the exact same path

This is not true for all characters. Some can only be expressed by percent-encoding, and decoding them will either break things completely (e.g. %20) or change the meaning of the URL (e.g. %2F, %3F in paths).

Yes, you can encode x as %78 and it should work identically, and you can decode %78 to x and it should work identically—though in both cases, I reckon there’s a strong case for blocking the request as suspicious, and I will probably start doing that soon.

But take these examples of improperly decoding:

• /foo%2Fbar/baz.html has path «"foo/bar", "baz.html"».

• /foo/bar/baz.html has segments «"foo", "bar", "baz.html"».

• /foo%3Fbar/baz?quux has path «"foo?bar", "baz"» and query "quux".

• /foo?bar/baz?quux has path «"foo"» and query "bar/baz?quux".

Indeed, it's essential in some cases. I was talking about in the context of sutterd's suggestion, where just lower-case letters have been encoded.

> strong case for blocking the request as suspicious

Yep, as there shouldn't be any "normal" reason to do such a thing.

Query strings break unpredictably, and that alone is enough to ban them by third parties, especially for something as minor as referral tracking.

Example: The Browser is a well known link aggregation paid periodical. I subscribe, and every 1 in 10 or 20 links I clicked, it'd just break outright and I'd have to tediously edit the URL to fix it (assuming the website didn't do a silent ninja URL edit and make it impossible for me to remember what URL I opened possibly days or weeks ago in a tab and potentially fix it). This was annoying enough to bother me regularly, but not enough to figure out a workaround.

Why? ...Because TB was injecting a '?referrer=The_Browser' or something, and the receiving website server got confused by an invalid query and errored out. 'Wow, how careless of The Browser! Are they really so incompetent as to not even check their URLs before mailing an issue out to paying subscribers?'

I wondered the same thing, and I eventually complained to them. It turns out, they did check all their URLs carefully before emailing them out... emphasis on 'before', which meant that they were checking the query-string-free versions, which of course worked fine. (This is a good example of a testing failure due to not testing end-to-end or integration testing: they should have been testing draft emails sent to a testing account, to check for all possible issues like MIME mangling, not just query string shenanigans.)

After that they fixed it by making sure they injected the query string before they checked the URLs. (I suggested not injecting it at all, but they said that for business reasons, it was too valuable to show receiving websites exactly how much traffic TB was driving to them on net, because referrers are typically stripped from emails and reshares and just in general - this, BTW, is why the OP suggestion of 'just set a HTTP referrer header!' is naive and limited to very narrow niches where you can be sure that you can, in fact, just set the referrer header.)

But this error was affecting them for god knows how long and how many readers and how many clicks, and they didn't know. Because why would they? The most important thing any programmer or web dev should know about users is that "they may never tell you": https://pointersgonewild.com/2019/11/02/they-might-never-tel... (excerpts & more examples: https://gwern.net/ref/chevalier-boisvert-2019 ). No matter how badly broken a feature or service or URL may be, the odds are good that no user will ever tell you that. Laziness, public goods, learned helplessness / low standards, I don't know what it is, but never assume that you are aware of severe breakage (or vice-versa, as a user, never assume the creator is aware of even the most extreme problem or error).

Even the biggest businesses.... I was watching a friend the other day try to set up a bank account in Central America, and clicking on one of the few banks' websites to download the forms on their main web page. None of the form PDF download links worked. "That's not a good sign", they said. No, but also not as surprising as you might think - the bank might have no idea that some server config tweak broke their form links. After all, at least while I was watching, my friend didn't tell them about their problem either!

I don't see how your example, The Browser (thebrowser.com), supports your argument that ad-hoc query-string additions are so prone-to-breaking that 3rd parties should ban them.

In fact, the example seems to suggest the opposite: a 17+ year successful paid subscription business – to which you appear to be a generally-satisfied customer! – receives enough "business value" from the practice, despite its failure modes, they don't want to stop. Improving their probe of the risk-of-failure was enough.

Seemingly, the practice works often enough, pleasing more destination sites than it angers, that "referral tracking" is not something "so minor".

> Improving their probe of the risk-of-failure was enough.

The point was it was dangerous in a way they didn't even realize was an issue, for a thin business rationale. Unless you are going to do thorough tests and understand the risk you are taking (which they did not, as evidenced by screwing it up systematically at scale for years), you should not be doing it.

And it's not obvious that they are correct in their tightened-up testing, because even if a link is correct at the time they test it, it could break at any time thereafter.

> to which you appear to be a generally-satisfied customer!

No matter what _X_ is, _X_ would have to be a pretty epic screwup to make a customer unsubscribe solely over that! I never claimed it was such a major epic screwup that it could do that. So that is an unreasonable criterion: "well, you didn't outright quit, so I guess it can't be that bad." Indeed, but I never said it was, and somewhat bad is still bad; I was in fact fairly annoyed by the random breakage, and at the margin, everything matters. If TB did a few other things, in sum, they could potentially convince me to let my subscription lapse. An annoyance here, a papercut here, and pretty soon a generally-satisfied customer is no longer so satisfied...

I noticed that ChatGPT started to add the utm_source parameters for all links it recommends. For example, for GitHub links. Not sure if this critical or not but it could affect users for sure if URLs with any query parameters are blocked.

IMDB recently went haywire

they added these ugly qses into every click on their site, bonkers: ?ref_=nm_ov_bio_lk

I was just wondering if I should do something like this. I use a couple query string values and I validate them and issue a 40x if the value is invalid. So, I was wondering if I should issue a 40x for an unused query string val.

It's just a string though. A project that I'll never get to is a custom webserver so that QR codes can use the smaller characterset, so it can link to a URL with parameters without forcing the larger character set.

> It’s my website: I can do what I want with it.

> And you can do what you want with yours!

That does not make a lot of sense. Yes, you can do what you want with your website, but query-string is a way for users to query for additional information or wants or needs. I use them on my own websites to have more flexibility. For instance:

    foobar.com/ducks?pdf

That will download the website content as a formatted .pdf file.

I can give many more examples here. The "query strings are horrible" I can not agree with at all. His websites don't allow for query strings? That's fine. But in no way does this mean query strings are useless. Besides, what does it mean to "ban" it? You simply don't respond to query strings you don't want to handle. We do so via general routing in web-applications these days.

> foobar.com/ducks?pdf

This isn't relevant when talking about links to his site. This is relevant when talking about links to your site.

> Besides, what does it mean to "ban" it? You simply don't respond to query strings you don't want to handle.

It means that you're going to get some sort of 400 error when you follow a link to his site with a query string attached to it. He simply will not respond to query strings that he doesn't want to handle, which is all of them.

> "query strings are horrible"

That's not at all what the article says. You're responding to a weird strawman that doesn't resemble the article's actual point.

Yup do what works best for you.

I do the opposite I don't support path params. Means your router can just be a simple map/dict.

Query strings avoid all the hierarchy/taxonomy problems you run into with path params.

Instead of throwing up an error response wouldn’t he achieve more desirable results from redirecting the address to the same address but without the query string.

this does not achieve the same result. By throwing an error, the person using that url needs to remove the querystring if they want share the link.

It’s a form of protest.

Such a useless blog post and initiative. Author control his website, and if someone lands there by clicking a link, it is not user's fault.

If query strings are banned, tracking parameters will simply move to the URL, or use `?t=` & `?h=` if those are whitelisted.

Query strings are awesome. Especially for one-page applications.

I build a lot of internal applications, and one of my golden UI rules is that a user should be able to share their URL and other users should be able to see exactly what the sender did.

So if you have a dashboard or visualization where the user can add filters or configurations, I have all of their settings saved automatically in the URL. It's visible, it's obvious, it's easy, it's convenient.

>There is also a moral question here about whether it is okay to modify a given URL on behalf of the user in order to insert a referral query string into it. I think it isn't.

These dogmatic technical screeds are all so weird to me. They usually reveal more about the authors lack of experience or imagination than provide a useful truism.

Yes, query strings often enable useful features! But Chris's post, "no unauthorised query strings", is only regarding third parties adding them.

But... like... that's a weird hill to die on.

> If I wanted to know I’d look at the Referer header; and if it isn’t there, it’s probably for a good reason. You abuse your users by adding that to the link.

The reason is that the referrer headers are a usability and privacy nightmare. It's weird for the author to jump to such a conclusion.

This referral information is being done purely as a courtesy to the webhost. If we imagined a world in which ChatGPT or Wikipedia launched massive hugs of death on referral links without attributing themselves, that is a much, much worse outcome.

There's a referrer header, if the client wishes to send it. If they don't, the "courtesy to the web host" is done at the expense of the client. This particular web host takes umbrage at other sites taking advantage of their clients that way, which seems reasonable to me.

A relatively minor impact concern is that query strings create a new cache entry both in the browser and typically on server-side caches unless configured otherwise, so you might want to use URL fragment parameters if the parameters are only used by clientside JavaScript but the server response is the same.

This is really cool. My site is hosted by cloudflare, so I guess I could do the same with a cloudflare worker... maybe?

A neat and funny idea - but in the end it is hostile to the users who don’t always control what’s added to links.

Most of the sites that still use GET queries around here are the tax collection sites run by local governments, which pass those variables around after you login the way your mom... uh, it's HN, skip the mom joke.

I actually get a lot more annoyed by routing parsers that do the same thing Get requests do only by pretending to be a real URL.

This is genius, kudos Chris.

It also makes me wonder what other noxious online behaviours might be addressed through ... creative ... client-side responses similar to this.

We've already seen, for years, sites attempting to socially-condition people over the use of ad-blockers and Javascript disablers. No reason why the Other Side can't fight back as well.

> After I implemented that feature, a page from one of my favourite websites refused to load in the console... the third URL returns an HTTP 404 error page. The website uses the query string to determine which one of its several font collections to show.

Yes, let's unilaterally decide that query strings are bad because one website (ab)uses query strings to load different fonts.

It's the query strings that are the problem, not the website!

jfc.

Look, I'm against utm fragments as much as the next guy, but let's not throw away a perfectly good thing because tracking is evil.

Adding your own garbage to someone else's URLs is in fact the problem. Could they handle your garbage better? Sure. Is your garbage still a problem? Yes.

Postel's law worked OK when people operated in good faith. But today the internet is full of abusers. Rejecting requests that aren't exactly what they should be is probably the best policy now.

Postel's law is typically stated as "be conservative in what you do, be liberal in what you accept from others". It's unfortunately common for people to ignore the first half and hallucinate a third clause demanding that the recipient stay silent about the errors they receive.

That website is not abusing query strings, though, its usage of query strings is perfectly cromulent. And tfa is not saying not to use query strings, but not to append random garbage to other people's URLs.

The website uses the feature for its intended purpose. Adding random trash to the query string of another website assuming it'll ignore it is in fact a bad idea, always, even if you can usually get away with it.

The problem is adding query strings to the URLs of others. It's peak entitlement to think that's proper

> one website (ab)uses query strings

Really not abusing abusing query strings from a standards perspective, a 404 is not an improper response to an unexpected query string

> curl, for example, seems to illegitimately strip a trailing question mark (could be only for the command line, didn’t test library usage).

umm what? I don't know what they're actually sending where they think this, but if you think curl is broken you should re-think that maybe you're the one doing something wrong.

Here are some examples showing curl not stripping question marks (obviously), I am very curious what this person was actually seeing

    $ curl -s 'https://httpbingo.org/get?' | jq .url
    "https://httpbingo.org/get?"
    $ curl -s 'https://httpbingo.org/get?path' | jq .url
    "https://httpbingo.org/get?path"
    $ curl -s 'https://httpbingo.org/get?path,query=bananas' | jq .url
    "https://httpbingo.org/get?path,query=bananas"
    $ curl -s 'https://httpbingo.org/get????' | jq .url               
    "https://httpbingo.org/get????"
    $ curl -sv 'https://httpbingo.org/????' 2>&1 | grep :path
    * [HTTP/2] [1] [:path: /????]

  $ curl -s 'https://httpbingo.org/get?' | jq .url
  "https://httpbingo.org/get"

This may require further investigation.

From Debian 13.2 (Trixie) + Bash + curl 8.14.1:

  $ curl -s 'https://httpbingo.org/get?' | jq .url
  "https://httpbingo.org/get"

But on macOS + Bash/Zsh + curl 8.7.1:

  $ curl -s 'https://httpbingo.org/get?' | jq .url
  "https://httpbingo.org/get?"

I see some related changes here: https://github.com/curl/curl/commit/3eac21d

Interesting! I took a look with the agent and it looks like it was this change that went in at curl 8.8.0: https://github.com/curl/curl/commit/3eac21d86bc50ba459a9a8a0... (same one susam saw)

There's a flag that would preserve it, but no way to set it from the CLI afaict

edit: I started a discussion here: https://github.com/curl/curl/discussions/21544

Might be shell expansion? zsh uses `?` for filename expansion, others might as well: https://zsh.sourceforge.io/Doc/Release/Expansion.html#Filena...

Though I forget if any shell does stuff like that in quotes. Or printing oddities.

No, it’s definitely curl that’s doing it.

  $ echo 'https://httpbingo.org/get?'
  https://httpbingo.org/get?
  $ python
  >>> import json
  >>> import subprocess
  >>> json.loads(subprocess.run(['curl', '-s', 'https://httpbingo.org/get?'], stdout=subprocess.PIPE).stdout)['url']
  'https://httpbingo.org/get'

I’m using curl 8.20.0-3, Arch Linux, x86_64.

  $ curl --version
  curl 8.20.0 (x86_64-pc-linux-gnu) libcurl/8.20.0 OpenSSL/3.6.2 zlib/1.3.2 brotli/1.2.0 zstd/1.5.7 libidn2/2.3.8 libpsl/0.21.5 libssh2/1.11.1 nghttp2/1.69.0 ngtcp2/1.22.1 nghttp3/1.15.0 mit-krb5/1.21.3
  Release-Date: 2026-04-29
  Protocols: dict file ftp ftps gopher gophers http https imap imaps ipfs ipns mqtt mqtts pop3 pop3s rtsp scp sftp smtp smtps telnet tftp ws wss
  Features: alt-svc brotli GSS-API HSTS HTTP2 HTTP3 HTTPS-proxy IDN IPv6 Kerberos Largefile libz PSL SPNEGO SSL threadsafe TLS-SRP UnixSockets zstd

bagder merged a fix to curl in response to my report: https://github.com/curl/curl/commit/b079595f2e903b820a027a68...

Sorry for not believing you initially! I'm very surprised that was in there

But ?fbclid is not banned?

It is. Your ad blocker is removing it, so it doesn't trigger the error page.

Oh duh, makes a lot of sense!

Trying to boostrap some taboo against novel unpermissioned URL munging is silly prudishness.

Ensuring both sides of a hyperlink agree/consent was a design flaw that limited the uptake of pre-web hypertext systems. The web's laissez-faire approach demonstrated a looser coupling was far better for users, despite all the new failure modes.

Of course any site/server has the practical power free to treat inbound requests as rigorously (or harshly) as they want. But by the web's essential nature, it is equally part of the inherent range-of-freedom of outlink authors to craft their URLs (and thus the resulting requests) however they want. URLs are permissionless hyperlanguage, not the intellectual property of entities named therein.

Plenty of sites welcome such extra info, and those that don't want it can ignore it easily enough – including by just not caring enough about the undefined behavior/failures to do nothing.

Though, when a web publisher has naively deployed a system that's fragile with respect to unexpected query-string values, they should want to upgrade their thinking for robustness, via either conscious strictness or conscious permissiveness. Thereafter, their work will be ready for the real web, not a just some idealized sandbox where scolding unwanted behavior makes sense.

Running your own small website is a constant battle against grifters and bad online etiquette. When people hotlink images, I usually make a point of having some personal fun with mod_rewrite.

This is rad and made me smile

YouTube couldn't do that

?referrer=123 still works, so I guess it's selective.

Hell yeah

why would you do that instead of cutting it out with a redir ?

It's essentially telling user "Sorry, you entered my site from wrong side of the internet FUCK YOU"

Whatever floats your boat

I mean…the site that broke should know what to do with arbitrary query strings. If your site breaks when someone puts in an invalid query string, that’s on you?

This. Query strings are a standard feature and have many more purposes beyond tracking.

Yes, and if the site actually used query strings, then it would of course accept them. Why does it have any reason to accept invalid query strings?

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