Symfony version(s) affected

6.1.7

Description

The http client currently uses http_build_query, which encodes way to many characters. More and more URLs use special characters like [ @ : ! ; , * ], as they are not http-relevant. I saw, that this characters are accepted by the Symfony Routing Component, for example: UrlGenerator::30

Real world example

I'm currently working with an API, that expects ISO8601 DateTime strings in the URL.

RFC3339 states, that

[ISO8601] dates SHOULD be used in new protocols on the Internet

So usage of ISO8601 is defintively encouraged.

But as the : characters is encoded by the HttpClient, the parameter looking like 2022-11-24T18:00:00 is getting encoded, and therefore not accepted by the backend.

How to reproduce

HttpClient::create()->request('GET', 'your-url', [
    'query' => [
        'dateTime' => '2022-11-24T18:00:00'
    ]
]);

Possible Solution

Instead of using http_build_query, use a similar implementation like Symfony\Component\Routing\Generator\UrlGenerator

Additional Context

Comparisions:

Browsers: Neither Microsoft Edge nor Firefox encode the characters above in URLs.
Postman also sends them without encoding.