apc.php / gzdecode rss

[SailorMax]

decode rss content if it compressed

[madmajestro]

I'm not a maintainer, but quite familiar with the code.

It doesn't feel right to implement something like this, but since the server seems to ignore the Accept-Encoding: identity header, I don't see a better solution.

If anyone has a better idea / more elegant approach, please let me know.

Closes #600

[madmajestro]

Suggested change

	if ($rss[0] !== '<') {
	$rss = gzdecode($rss);
	}
	if (ord($rss[0]) === 0x1f && ord($rss[1]) === 0x8b) {
	$rss = gzdecode($rss);
	}

• I propose to check for the magic numbers 0x1f and 0x8b to identify the data as a gzip stream. Imho, this is more precise and it allows us to pick different decompression algorithms if necessary someday.
• A decompression failure (if gzdecode() returns false) should be handled properly. Perhaps it makes sense to do this a few lines earlier (before line 1115)?

[madmajestro]

And just a suggestion to adapt the commit title: Decode gzip-compressed rss content in apc.php
This is more in line with the style used in the other commits.