GNUsocial/gnu-social
4
0
Fork 1
Code Issues Releases Wiki Activity

[DOCS][Developer] httpclient: Add an example of lazyness care

Browse Source
This commit is contained in:
Diogo Peralta Cordeiro 2021-08-17 20:19:12 +01:00 committed by Hugo Sales
parent 31ca5cb35e
commit afd00fbdc5
Signed by: someonewithpc
GPG Key ID: 7D0C7EAFC9D835A0
1 changed files with 18 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
docs/developer/src/httpclient.md
View File

@ -8,4 +8,22 @@ The `$options` are elaborated in [Symfony Doc](https://symfony.com/doc/current/h
Please note that the HTTP Client is [lazy](https://en.wikipedia.org/wiki/Lazy_evaluation), Please note that the HTTP Client is [lazy](https://en.wikipedia.org/wiki/Lazy_evaluation),
which makes it very important to bear in mind [Network Errors](https://symfony.com/doc/current/http_client.html#dealing-with-network-errors), which makes it very important to bear in mind [Network Errors](https://symfony.com/doc/current/http_client.html#dealing-with-network-errors),
An example where this behaviour has to be considered:
```php
if (Common::isValidHttpUrl($url)) {
$head = HTTPClient::head($url);
// This must come before getInfo given that Symfony HTTPClient is lazy (thus forcing curl exec)
try {
$headers = $head->getHeaders();
} catch (ClientException $e) {
throw new InvalidArgumentException(previous: $e);
}
$url = $head->getInfo('url'); // The last effective url (after getHeaders, so it follows redirects)
$url_hash = hash(self::URLHASH_ALGO, $url);
} else {
throw new InvalidArgumentException();
}
```
What you can take from Responses is specified [here](https://symfony.com/doc/current/http_client.html#processing-responses). What you can take from Responses is specified [here](https://symfony.com/doc/current/http_client.html#processing-responses).