mirror of
https://github.com/kremalicious/krtmn.git
synced 2024-12-23 01:29:50 +01:00
172 lines
5.5 KiB
PHP
172 lines
5.5 KiB
PHP
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<?php
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// TODO: improve this.
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// yourls_get_http_transport: use static vars
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// yourls_get_remote_content: return array( content, status, code )
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// Determine best transport for GET request.
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// Order of preference: curl, fopen, fsockopen.
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// Return 'curl', 'fopen', 'fsockopen' or false if nothing works
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function yourls_get_http_transport( $url ) {
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$transports = array();
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$scheme = parse_url( $url, PHP_URL_SCHEME );
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$is_ssl = ( $scheme == 'https' || $scheme == 'ssl' );
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// Test transports by order of preference, best first
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// curl
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if( function_exists('curl_init') && function_exists('curl_exec') )
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$transports[]= 'curl';
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// fopen. Doesn't work with https?
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if( !$is_ssl && function_exists('fopen') && ini_get('allow_url_fopen') )
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$transports[]= 'fopen';
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// fsock
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if( function_exists( 'fsockopen' ) )
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$transports[]= 'fsockopen';
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$best = ( $transports ? array_shift( $transports ) : false );
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return yourls_apply_filter( 'get_http_transport', $best, $transports );
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}
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// Get remote content via a GET request using best transport available
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// Returns $content (might be an error message) or false if no transport available
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function yourls_get_remote_content( $url, $maxlen = 4096, $timeout = 5 ) {
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$url = yourls_sanitize_url( $url );
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$transport = yourls_get_http_transport( $url );
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if( $transport ) {
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$content = call_user_func( 'yourls_get_remote_content_'.$transport, $url, $maxlen, $timeout );
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} else {
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$content = false;
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}
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return yourls_apply_filter( 'get_remote_content', $content, $url, $maxlen, $timeout );
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}
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// Get remote content using curl. Needs sanitized $url. Returns $content or false
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function yourls_get_remote_content_curl( $url, $maxlen = 4096, $timeout = 5 ) {
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$ch = curl_init();
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curl_setopt( $ch, CURLOPT_URL, $url );
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curl_setopt( $ch, CURLOPT_CONNECTTIMEOUT, $timeout );
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curl_setopt( $ch, CURLOPT_TIMEOUT, $timeout );
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curl_setopt( $ch, CURLOPT_RETURNTRANSFER, 1 );
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curl_setopt( $ch, CURLOPT_FOLLOWLOCATION, 1 ); // follow redirects...
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curl_setopt( $ch, CURLOPT_MAXREDIRS, 3 ); // ... but not more than 3
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curl_setopt( $ch, CURLOPT_USERAGENT, yourls_http_user_agent() );
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curl_setopt( $ch, CURLOPT_RANGE, "0-{$maxlen}" ); // Get no more than $maxlen
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curl_setopt( $ch, CURLOPT_SSL_VERIFYPEER, 0 ); // dont check SSL certificates
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curl_setopt( $ch, CURLOPT_HEADER, 0 );
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$response = curl_exec( $ch );
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if( !$response || curl_error( $ch ) ) {
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//$response = 'Error: '.curl_error( $ch );
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return false;
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}
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curl_close( $ch );
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return substr( $response, 0, $maxlen ); // substr in case CURLOPT_RANGE not supported
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}
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// Get remote content using fopen. Needs sanitized $url. Returns $content or false
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function yourls_get_remote_content_fopen( $url, $maxlen = 4096, $timeout = 5 ) {
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$content = false;
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$initial_timeout = @ini_set( 'default_socket_timeout', $timeout );
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$initial_user_agent = @ini_set( 'user_agent', yourls_http_user_agent() );
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// Basic error reporting shortcut
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set_error_handler( create_function('$code, $string', 'global $ydb; $ydb->fopen_error = $string;') );
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$fp = fopen( $url, 'r');
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if( $fp !== false ) {
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$buffer = min( $maxlen, 4096 );
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while ( !feof( $fp ) && !( strlen( $content ) >= $maxlen ) ) {
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$content .= fread( $fp, $buffer );
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}
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fclose( $fp );
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}
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if( $initial_timeout !== false )
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@ini_set('default_socket_timeout', $initial_timeout);
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if( $initial_user_agent !== false )
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@ini_set('user_agent', $initial_user_agent);
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restore_error_handler();
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if( !$content ) {
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//global $ydb;
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//$content = 'Error: '.strip_tags( $ydb->fopen_error );
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return false;
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}
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return $content;
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}
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// Get remote content using fsockopen. Needs sanitized $url. Returns $content or false
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function yourls_get_remote_content_fsockopen( $url, $maxlen = 4096, $timeout = 5 ) {
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// get the host name and url path
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$parsed_url = parse_url($url);
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$host = $parsed_url['host'];
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if ( isset($parsed_url['path']) ) {
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$path = $parsed_url['path'];
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} else {
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$path = '/'; // the url is pointing to the host like http://www.mysite.com
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}
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if (isset($parsed_url['query'])) {
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$path .= '?' . $parsed_url['query'];
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}
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if (isset($parsed_url['port'])) {
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$port = $parsed_url['port'];
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} else {
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$port = '80';
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}
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$response = false;
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// connect to the remote server
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$fp = @fsockopen( $host, $port, $errno, $errstr, $timeout );
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var_dump( $errno, $errstr );
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if( $fp !== false ) {
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// send some fake headers to mimick a standard browser
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fputs($fp, "GET $path HTTP/1.0\r\n" .
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"Host: $host\r\n" .
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"User-Agent: " . yourls_http_user_agent() . "\r\n" .
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"Accept: */*\r\n" .
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"Accept-Language: en-us,en;q=0.5\r\n" .
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"Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7\r\n" .
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"Keep-Alive: 300\r\n" .
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"Connection: keep-alive\r\n" .
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"Referer: http://$host\r\n\r\n");
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// retrieve the response from the remote server
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$buffer = min( $maxlen, 4096 );
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while ( !feof( $fp ) && !( strlen( $response ) >= $maxlen ) ) { // get more or less $maxlen bytes (between $maxlen and ($maxlen + ($maxlen-1)) actually)
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$response .= fread( $fp, $buffer );
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}
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fclose( $fp );
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} else {
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//$response = trim( "Error: #$errno. $errstr" );
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return false;
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}
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// return the file content
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return $response;
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}
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// Return funky user agent string
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function yourls_http_user_agent() {
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return yourls_apply_filter( 'http_user_agent', 'YOURLS v'.YOURLS_VERSION.' +http://yourls.org/ (running on '.YOURLS_SITE.')' );
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}
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