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/wp-includes/ -> class-wp-http-encoding.php (summary)

HTTP API: WP_Http_Encoding class

File Size: 232 lines (7 kb)
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Defines 1 class

WP_Http_Encoding:: (7 methods):
  compress()
  decompress()
  compatible_gzinflate()
  accept_encoding()
  content_encoding()
  should_decode()
  is_available()


Class: WP_Http_Encoding  - X-Ref

Core class used to implement deflate and gzip transfer encoding support for HTTP requests.

Includes RFC 1950, RFC 1951, and RFC 1952.

compress( $raw, $level = 9, $supports = null )   X-Ref
Compress raw string using the deflate format.

Supports the RFC 1951 standard.

param: string $raw String to compress.
param: int $level Optional, default is 9. Compression level, 9 is highest.
param: string $supports Optional, not used. When implemented it will choose the right compression based on what the server supports.
return: string|false False on failure.

decompress( $compressed, $length = null )   X-Ref
Decompression of deflated string.

Will attempt to decompress using the RFC 1950 standard, and if that fails
then the RFC 1951 standard deflate will be attempted. Finally, the RFC
1952 standard gzip decode will be attempted. If all fail, then the
original compressed string will be returned.

param: string $compressed String to decompress.
param: int $length The optional length of the compressed data.
return: string|bool False on failure.

compatible_gzinflate( $gzData )   X-Ref
Decompression of deflated string while staying compatible with the majority of servers.

Certain Servers will return deflated data with headers which PHP's gzinflate()
function cannot handle out of the box. The following function has been created from
various snippets on the gzinflate() PHP documentation.

Warning: Magic numbers within. Due to the potential different formats that the compressed
data may be returned in, some "magic offsets" are needed to ensure proper decompression
takes place. For a simple progmatic way to determine the magic offset in use, see:
https://core.trac.wordpress.org/ticket/18273

param: string $gzData String to decompress.
return: string|bool False on failure.

accept_encoding( $url, $args )   X-Ref
What encoding types to accept and their priority values.

param: string $url
param: array  $args
return: string Types of encoding to accept.

content_encoding()   X-Ref
What encoding the content used when it was compressed to send in the headers.

return: string Content-Encoding string to send in the header.

should_decode( $headers )   X-Ref
Whether the content be decoded based on the headers.

param: array|string $headers All of the available headers.
return: bool

is_available()   X-Ref
Whether decompression and compression are supported by the PHP version.

Each function is tested instead of checking for the zlib extension, to
ensure that the functions all exist in the PHP version and aren't
disabled.

return: bool



Generated: Thu Oct 17 08:20:02 2019 Cross-referenced by PHPXref 0.7