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If HTTP response headers are already sent, don't fiddle with "zlib.output_compression"

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Summary:
We write some synthetic HTTP responses inside unit tests. Some responses have an indirect side effect of adjusting "zlib.output_compression", but this adjustment fails if headers have already been output. From a CLI context, headers appear to count as already-output after we write anything to stdout:

```
<?php

echo headers_sent() ? "Y" : "N";
echo "\n";
echo headers_sent() ? "Y" : "N";
echo "\n";
```

This script prints "N", then "Y".

Recently, the default severity of warnings was increased in libphutil; this has been a long-standing warning but now causes test failures.

This behavior is sort of silly but the whole thing is kind of moot anyway. Just skip it if "headers_sent()" is true.

Test Plan: Ran "arc unit --everything", got clean results.

Differential Revision: https://secure.phabricator.com/D21055
This commit is contained in:
epriestley 2020-04-03 12:12:37 -07:00
parent 62f5bdbbd2
commit 067b04aaf1
1 changed files with 13 additions and 7 deletions
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20
src/aphront/response/AphrontResponse.php
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@ -417,13 +417,19 @@ abstract class AphrontResponse extends Phobject {
} }
public function willBeginWrite() { public function willBeginWrite() {
if ($this->shouldCompressResponse()) { // If we've already sent headers, these "ini_set()" calls will warn that
// Enable automatic compression here. Webservers sometimes do this for // they have no effect. Today, this always happens because we're inside
// us, but we now detect the absence of compression and warn users about // a unit test, so just skip adjusting the setting.
// it so try to cover our bases more thoroughly.
ini_set('zlib.output_compression', 1); if (!headers_sent()) {
} else { if ($this->shouldCompressResponse()) {
ini_set('zlib.output_compression', 0); // Enable automatic compression here. Webservers sometimes do this for
// us, but we now detect the absence of compression and warn users about
// it so try to cover our bases more thoroughly.
ini_set('zlib.output_compression', 1);
} else {
ini_set('zlib.output_compression', 0);
}
} }
} }