#TIL the query component of a URI is actually completely opaque.
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@trwnh doesn't that kind of depend on the type of form? Classically for a something like a search GET would be a more appropriate method than POST or PUT …
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@oblomov maybe? i can see arguments for search being a POST.
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@oblomov the semantic argument might be that GET is appropriate for when you want to refer to a query itself, for example using /search?bananas to search for "bananas". but the problems with GET are numerous:
- query components are often logged, while request bodies are not
- query components are limited in how complex they can get -- it's not easy to represent arrays, maps, hierarchical data, and so on
- search may be an expensive request, so better to not allow any old browser to do it -
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@trwnh Unless I'm mistaken it's part of the CGI spec not URI spec.
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@dalias yeah i figured this out downthread -- it's HTML 2.0 forms and application/x-www-url-formencoded when the form method=get
CGI also popularized it as well, although CGI takes the opaque QUERY_STRING so the convention mostly arises from html form encoding
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@trwnh hm I'm not convinced. The main issue is that neither POST nor PUT are conceptually appropriate. Among the methods defined by HTTP, GET is the one that's conceptually closest. OTOH, those *are* problems with using a query string. Maybe they could be reduced by other means, such as additional headers or body payload (GET *can* have a payload)
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@oblomov well POST is "do something" not necessarily "create something". https://www.rfc-editor.org/rfc/rfc9110.html#section-9.3.3
> process the representation enclosed in the request according to the resource's own specific semantics
imo "take this request, parse some params out of it, then perform the action" is a valid way of thinking about search.
as for GET,
> requests transfer of a current selected representation for the target resource
is often but not always appropriate. depends on if you see results as a resource.
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and that's what it really comes down to imo -- the use of a query component fundamentally alters the identity, you are asking for a different resource when you append the query component. /search and /search?query are different resources.
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@trwnh oh good point, so if it's done by GET it *must* include the query parameters in the URL. And yeah, now I can see better why POST would be a better choice.
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@oblomov there is one advantage to GET and that is the ability to share search results by copypasting a link to someone else or using it as an href
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Alexander The 1streplied to infinite love ⴳ last edited by
@trwnh @oblomov I'd add one additional benefit: they're infinitely easier to debug and test.
At least it's pretty common practice as I recall in Java EE to make an HttpServlet, generate doGet/doPost, and have doPost just call doGet, or vice versa.
Then GET URL calls let you diagnose what's being passed to which query parameter.
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infinite love ⴳreplied to Alexander The 1st last edited by
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Jean-Baptiste "JBQ" Quérureplied to infinite love ⴳ last edited by
@trwnh No matter what assumption you make, you'll find some code out there that breaks that assumption. Everything web-related is a nightmare.
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@trwnh My favourite part of that rabbit hole is that + is (erroneously?) not reserved in RFCs 1738 or 1630 (and 1630's second BNF production for "safe" includes +): https://datatracker.ietf.org/doc/html/rfc1738#page-20 https://datatracker.ietf.org/doc/html/rfc1630#page-26
This, along with the "and then" in HTML 2.0, results in enough ambiguity that space-plus could be encoded as "++" or "%2B%2B" depending on how you interpret the spec.
From RFC 1630, it looks like "search" strings were originally intended to represent space-separated (user-specified?) search terms, and I still occasionally see query strings that are bare search strings.
Another fun thing is that RFC 1808 adds generic ;-params separate from the query string (and RFC 2396 moves them to be part of path components), but they are rarely used in HTTP and were too late for HTML forms. (I'm not sure any RFC defines semantics for "directory" params, but they exist.)
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@trwnh @AT1ST @oblomov and how is it any more “right” to obscure the thing that was searched for in your logs, to the user, and when sharing links?
I definitely see the case for a search API endpoint (not exposed to the user) being a POST (and elastic search does this), but our user facing search page is definitely a GET. Modified filters and the query text end up as query parameters.
Just because full text search is suddenly involved why is GET no longer appropriate?
