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First pass compression support for the HTTP API. See #8674 props jacobsantos.

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git-svn-id: http://svn.automattic.com/wordpress/trunk@10410 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This commit is contained in:
westi 2009-01-22 21:16:11 +00:00
parent f03329322c
commit fe07a83717
1 changed files with 152 additions and 2 deletions
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154
wp-includes/http.php
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@ -12,6 +12,134 @@
* @author Jacob Santos <wordpress@santosj.name>
*/
/**
* Implementation for deflate and gzip transfer encodings.
*
* Includes RFC 1950, RFC 1951, and RFC 1952.
*
* @since unknown
* @package WordPress
* @subpackage HTTP
*/
class WP_Http_Encoding {
/**
* Compress raw string using the deflate format.
*
* Supports the RFC 1951 standard.
*
* @since unknown
*
* @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|bool False on failure.
*/
function compress( $raw, $level = 9, $supports = null ) {
return gzdeflate( $raw, $level );
}
/**
* 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.
*
* @since unknown
*
* @param string $compressed String to decompress.
* @param int $length The optional length of the compressed data.
* @return string|bool False on failure.
*/
function decompress( $compressed, $length = null ) {
$decompressed = gzinflate( $compressed );
if( false !== $decompressed )
return $decompressed;
$decompressed = gzuncompress( $compressed );
if( false !== $decompressed )
return $decompressed;
$decompressed = gzdecode( $compressed );
if( false !== $decompressed )
return $decompressed;
return $compressed;
}
/**
* What encoding types to accept and their priority values.
*
* @since unknown
*
* @return string Types of encoding to accept.
*/
function accept_encoding() {
$type = array();
if( function_exists( 'gzinflate' ) )
$type[] = 'deflate;q=1.0';
if( function_exists( 'gzuncompress' ) )
$type[] = 'compress;q=0.5';
if( function_exists( 'gzdecode' ) )
$type[] = 'gzip;q=0.5';
return implode(', ', $type);
}
/**
* What enconding the content used when it was compressed to send in the headers.
*
* @since unknown
*
* @return string Content-Encoding string to send in the header.
*/
function content_encoding() {
return 'deflate';
}
/**
* Whether the content be decoded based on the headers.
*
* @since unknown
*
* @param array|string $headers All of the available headers.
* @return bool
*/
function should_decode($headers) {
if( is_array( $headers ) ) {
if( array_key_exists('content-encoding', $headers) && ! empty( $headers['content-encoding'] ) )
return true;
} else if( is_string( $headers ) ) {
return ( stripos($headers, 'content-encoding:') !== false );
}
return false;
}
/**
* 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.
*
* @since unknown
*
* @return bool
*/
function is_available() {
return ( function_exists('gzuncompress') || function_exists('gzdeflate') ||
function_exists('gzinflate') );
}
}
/**
* WordPress HTTP Class for managing HTTP Transports and making HTTP requests.
*
@ -232,7 +360,10 @@ class WP_Http {
'httpversion' => apply_filters( 'http_request_version', '1.0'),
'user-agent' => apply_filters( 'http_headers_useragent', 'WordPress/' . $wp_version ),
'blocking' => true,
'headers' => array(), 'body' => null
'headers' => array(),
'body' => null,
'compress' => false,
'decompress' => true
);
$r = wp_parse_args( $args, $defaults );
@ -256,6 +387,9 @@ class WP_Http {
unset($r['headers']['user-agent']);
}
if( WP_Http_Encoding::is_available() )
$r['headers']['Accept-Encoding'] = WP_Http_Encoding::accept_encoding();
if ( is_null($r['body']) ) {
// Some servers fail when sending content without the content-length
// header being set.
@ -595,6 +729,9 @@ class WP_Http_Fsockopen {
if ( ! empty( $process['body'] ) && isset( $arrHeaders['headers']['transfer-encoding'] ) && 'chunked' == $arrHeaders['headers']['transfer-encoding'] )
$process['body'] = WP_Http::chunkTransferDecode($process['body']);
if ( true === $r['decompress'] && true === WP_Http_Encoding::should_decode($arrHeaders) )
$process['body'] = WP_Http_Encoding::decompress( $process['body'] );
return array('headers' => $arrHeaders['headers'], 'body' => $process['body'], 'response' => $arrHeaders['response']);
}
@ -705,6 +842,9 @@ class WP_Http_Fopen {
if ( ! empty( $strResponse ) && isset( $processedHeaders['headers']['transfer-encoding'] ) && 'chunked' == $processedHeaders['headers']['transfer-encoding'] )
$strResponse = WP_Http::chunkTransferDecode($strResponse);
if ( true === $r['decompress'] && true === WP_Http_Encoding::should_decode($processedHeaders) )
$strResponse = WP_Http_Encoding::decompress( $strResponse );
return array('headers' => $processedHeaders['headers'], 'body' => $strResponse, 'response' => $processedHeaders['response']);
}
@ -817,6 +957,8 @@ class WP_Http_Streams {
$strResponse = stream_get_contents($handle);
$meta = stream_get_meta_data($handle);
fclose($handle);
$processedHeaders = array();
if( isset( $meta['wrapper_data']['headers'] ) )
$processedHeaders = WP_Http::processHeaders($meta['wrapper_data']['headers']);
@ -826,7 +968,8 @@ class WP_Http_Streams {
if ( ! empty( $strResponse ) && isset( $processedHeaders['headers']['transfer-encoding'] ) && 'chunked' == $processedHeaders['headers']['transfer-encoding'] )
$strResponse = WP_Http::chunkTransferDecode($strResponse);
fclose($handle);
if ( true === $r['decompress'] && true === WP_Http_Encoding::should_decode($processedHeaders) )
$strResponse = WP_Http_Encoding::decompress( $strResponse );
return array('headers' => $processedHeaders['headers'], 'body' => $strResponse, 'response' => $processedHeaders['response']);
}
@ -940,6 +1083,9 @@ class WP_Http_ExtHTTP {
$theBody = http_chunked_decode($theBody);
}
if ( true === $r['decompress'] && true === WP_Http_Encoding::should_decode($theHeaders) )
$theBody = http_inflate( $theBody );
$theResponse = array();
$theResponse['code'] = $info['response_code'];
$theResponse['message'] = get_status_header_desc($info['response_code']);
@ -1074,12 +1220,16 @@ class WP_Http_Curl {
$theHeaders = array( 'headers' => array() );
$theBody = '';
}
$response = array();
$response['code'] = curl_getinfo( $handle, CURLINFO_HTTP_CODE );
$response['message'] = get_status_header_desc($response['code']);
curl_close( $handle );
if ( true === $r['decompress'] && true === WP_Http_Encoding::should_decode($theHeaders) )
$theBody = WP_Http_Encoding::decompress( $theBody );
return array('headers' => $theHeaders['headers'], 'body' => $theBody, 'response' => $response);
}