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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 1 | daniel-mar | 1 | <?php |
| 2 | |||
| 3 | /* |
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| 4 | * ViaThinkSoft |
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| 5 | * PHP Simple Internet Class (HTTPC = HTTP Class) |
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| 6 | * Version: 1.4.1 (2009-08-06) |
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| 7 | * Source: http://www.viathinksoft.de/?page=projektanzeige&seite=download&id=152 |
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| 8 | */ |
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| 9 | |||
| 10 | /* USAGE EXAMPLE */ |
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| 11 | |||
| 12 | /* function inetconn_ok() { |
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| 13 | return true; |
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| 14 | } |
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| 15 | |||
| 16 | $http = new HTTPClass; |
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| 17 | |||
| 18 | // Everything is optional in this part |
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| 19 | $http->connection_checker = 'inetconn_ok'; |
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| 20 | $http->user_agent = 'Hello World Browser'; |
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| 21 | $http->redirect_limit = 15; |
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| 22 | $http->time_out = 10; |
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| 23 | $http->error_level = HTTPC_ERRLVL_FATAL_ERRORS; |
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| 24 | $http->use_old_http_protocol_version = false; |
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| 25 | $http->use_post_method = false; |
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| 26 | $http->additional_fields['Referer'] = 'http://www.viathinksoft.de/'; |
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| 27 | |||
| 28 | $res = $http->execute_http_request('http://www.example.com/'); |
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| 29 | if ($res->error != HTTPC_NO_ERROR) { |
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| 30 | echo 'Error!'; |
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| 31 | } else { |
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| 32 | if (!is_null($res->final_redirected_url)) echo '<p>Last redirection was: '.$res->final_redirected_url.'</p>'; |
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| 33 | echo '<p><code>'.nl2br(htmlentities($res->content)).'</code></p>'; |
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| 34 | } */ |
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| 35 | |||
| 36 | define('HTTPC_NO_ERROR', 0); |
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| 37 | define('HTTPC_ERROR_INTERNET_CONNECTION', 1); |
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| 38 | define('HTTPC_ERROR_PROTOCOL', 2); |
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| 39 | define('HTTPC_ERROR_SOCKET', 3); |
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| 40 | define('HTTPC_WARNING_HTTP_STATUS_CODE', 4); |
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| 41 | define('HTTPC_ERROR_TOO_MANY_REDIRECTS', 5); |
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| 42 | define('HTTPC_WARNING_UNKNOWN_STATUS', 6); |
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| 43 | define('HTTPC_WARNING_REDIRECT_IGNORED', 7); |
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| 44 | define('HTTPC_WARNING_CONNECTION_CHECKER_INVALID', 8); |
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| 45 | |||
| 46 | class HTTPClassResult { |
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| 47 | |||
| 48 | public $content = null; |
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| 49 | public $status_code = null; |
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| 50 | public $error = HTTPC_NO_ERROR; |
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| 51 | public $error_info = null; |
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| 52 | public $final_redirected_url = null; |
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| 53 | public $redirect_counter = 0; |
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| 54 | public $header = null; |
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| 55 | |||
| 56 | } |
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| 57 | |||
| 58 | define('HTTPC_ERRLVL_NO_ERRORS', 0); |
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| 59 | define('HTTPC_ERRLVL_FATAL_ERRORS', 1); |
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| 60 | define('HTTPC_ERRLVL_WARNINGS', 2); |
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| 61 | |||
| 62 | class HTTPClass { |
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| 63 | |||
| 64 | public $user_agent; |
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| 65 | public $redirect_limit; |
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| 66 | public $time_out; |
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| 67 | public $error_level; |
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| 68 | public $connection_checker; |
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| 69 | public $use_old_http_protocol_version; |
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| 70 | public $use_post_method; |
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| 71 | public $additional_fields; |
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| 72 | |||
| 73 | // Konstruktor |
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| 74 | |||
| 75 | function HTTPClass() |
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| 76 | { |
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| 77 | $this->user_agent = 'PHP/'.phpversion(); |
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| 78 | $this->redirect_limit = 50; |
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| 79 | $this->time_out = 10; |
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| 80 | $this->error_level = HTTPC_ERRLVL_WARNINGS; |
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| 81 | $this->connection_checker = null; |
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| 82 | $this->use_old_http_protocol_version = false; |
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| 83 | $this->use_post_method = false; |
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| 84 | $this->additional_fields = array(); |
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| 85 | } |
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| 86 | |||
| 87 | // http://de.php.net/manual/de/function.fsockopen.php#73581 |
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| 88 | // http://de.php.net/manual/de/function.fsockopen.php#75175 |
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| 89 | |||
| 90 | private function decode_header ( $str ) |
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| 91 | { |
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| 92 | $part = preg_split ( "/\r?\n/", $str, -1, PREG_SPLIT_NO_EMPTY ); |
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| 93 | $out = array (); |
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| 94 | |||
| 95 | for ( $h = 0; $h < sizeof ( $part ); $h++ ) |
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| 96 | { |
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| 97 | if ( $h != 0 ) |
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| 98 | { |
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| 99 | $pos = strpos ( $part[$h], ':' ); |
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| 100 | $k = strtolower ( str_replace ( ' ', '', substr ( $part[$h], 0, $pos ) ) ); |
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| 101 | $v = trim ( substr ( $part[$h], ( $pos + 1 ) ) ); |
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| 102 | } |
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| 103 | else |
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| 104 | { |
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| 105 | $k = 'status'; |
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| 106 | $v = explode ( ' ', $part[$h] ); |
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| 107 | $v = $v[1]; |
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| 108 | } |
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| 109 | |||
| 110 | if ($k == '') break; // Zusatz von Personal WebBase |
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| 111 | |||
| 112 | if ( $k == 'set-cookie' ) |
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| 113 | { |
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| 114 | $out['cookies'][] = $v; |
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| 115 | } |
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| 116 | else if ( $k == 'content-type' ) |
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| 117 | { |
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| 118 | if ( ( $cs = strpos ( $v, ';' ) ) !== false ) |
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| 119 | { |
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| 120 | $out[$k] = substr ( $v, 0, $cs ); |
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| 121 | } |
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| 122 | else |
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| 123 | { |
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| 124 | $out[$k] = $v; |
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| 125 | } |
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| 126 | } |
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| 127 | else |
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| 128 | { |
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| 129 | $out[$k] = $v; |
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| 130 | } |
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| 131 | } |
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| 132 | |||
| 133 | return $out; |
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| 134 | } |
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| 135 | |||
| 136 | private function decode_body ( $info, $str, $eol = "\r\n" ) |
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| 137 | { |
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| 138 | $tmp = $str; |
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| 139 | $add = strlen ( $eol ); |
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| 140 | $str = ''; |
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| 141 | if ( isset ( $info['transfer-encoding'] ) && $info['transfer-encoding'] == 'chunked' ) |
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| 142 | { |
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| 143 | do |
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| 144 | { |
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| 145 | $tmp = ltrim ( $tmp ); |
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| 146 | $pos = strpos ( $tmp, $eol ); |
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| 147 | $len = hexdec ( substr ( $tmp, 0, $pos ) ); |
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| 148 | if ( isset ( $info['content-encoding'] ) ) |
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| 149 | { |
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| 150 | $str .= gzinflate ( substr ( $tmp, ( $pos + $add + 10 ), $len ) ); |
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| 151 | } |
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| 152 | else |
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| 153 | { |
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| 154 | $str .= substr ( $tmp, ( $pos + $add ), $len ); |
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| 155 | } |
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| 156 | |||
| 157 | $tmp = substr ( $tmp, ( $len + $pos + $add ) ); |
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| 158 | $check = trim ( $tmp ); |
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| 159 | } |
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| 160 | while ( ! empty ( $check ) ); |
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| 161 | } |
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| 162 | else if ( isset ( $info['content-encoding'] ) ) |
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| 163 | { |
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| 164 | $str = gzinflate ( substr ( $tmp, 10 ) ); |
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| 165 | } |
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| 166 | else { |
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| 167 | $str = $tmp; |
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| 168 | } |
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| 169 | return $str; |
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| 170 | } |
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| 171 | |||
| 172 | private function url_protokoll_vorhanden($url) |
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| 173 | { |
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| 174 | $ary = explode('://', $url); |
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| 175 | return ((strpos($ary[0], '/') === false) && (isset($ary[1]))); |
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| 176 | } |
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| 177 | |||
| 178 | private function get_error_class($code) |
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| 179 | { |
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| 180 | return floor($code / 100); |
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| 181 | } |
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| 182 | |||
| 183 | public function execute_http_request($url, $data_to_send) |
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| 184 | { |
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| 185 | $result = new HTTPClassResult(); |
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| 186 | |||
| 187 | if (!is_null($this->connection_checker)) { |
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| 188 | if (!function_exists($this->connection_checker)) { |
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| 189 | if ($this->error_level >= HTTPC_ERRLVL_WARNINGS) { |
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| 190 | trigger_error("The connection checker function does not exists!", E_USER_WARNING); |
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| 191 | } |
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| 192 | $result->error = HTTPC_WARNING_CONNECTION_CHECKER_INVALID; |
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| 193 | $result->error_info = null; |
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| 194 | } else { |
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| 195 | if (!call_user_func($this->connection_checker)) { |
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| 196 | if ($this->error_level >= HTTPC_ERRLVL_FATAL_ERRORS) { |
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| 197 | trigger_error('No internet connection', E_USER_ERROR); |
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| 198 | } |
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| 199 | $result->error = HTTPC_ERROR_INTERNET_CONNECTION; |
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| 200 | return $result; |
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| 201 | } |
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| 202 | } |
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| 203 | } |
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| 204 | |||
| 205 | for ($result->redirect_counter = 0; $result->redirect_counter <= $this->redirect_limit; $result->redirect_counter++) { |
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| 206 | if (!$this->url_protokoll_vorhanden($url)) $url = 'http://'.$url; |
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| 207 | |||
| 208 | // URL splitten |
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| 209 | $ary = explode('://', $url); |
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| 210 | $cry = explode('/', $ary[1]); |
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| 211 | $bry = explode(':', $cry[0]); |
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| 212 | |||
| 213 | // Protokoll festlegen |
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| 214 | $protocol = strtolower($ary[0]); |
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| 215 | |||
| 216 | // Und nun prüfen, ob das Protokoll gültig ist |
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| 217 | if (($protocol != 'http') && ($protocol != 'https')) { |
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| 218 | if ($this->error_level >= HTTPC_ERRLVL_FATAL_ERRORS) { |
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| 219 | trigger_error("Unknown protocol '$protocol'", E_USER_ERROR); |
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| 220 | } |
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| 221 | $result->error = HTTPC_ERROR_PROTOCOL; |
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| 222 | $result->error_info = $protocol; |
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| 223 | return $result; |
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| 224 | } |
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| 225 | |||
| 226 | // Host festlegen |
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| 227 | $host = $bry[0]; |
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| 228 | |||
| 229 | // Port festlegen und ggf. SSL-Präfix setzen |
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| 230 | if (isset($bry[1])) { |
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| 231 | // Es ist ein Port angegeben |
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| 232 | $port = $bry[1]; |
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| 233 | } else { |
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| 234 | // Wenn nicht, dann den Standardports für das Protokoll anwählen |
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| 235 | |||
| 236 | if ($protocol == 'http') { |
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| 237 | $port = 80; |
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| 238 | } else if ($protocol == 'https') { |
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| 239 | $port = 443; |
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| 240 | } |
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| 241 | } |
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| 242 | |||
| 243 | // Wenn SSL verwendet wird, dann den Präfix setzen |
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| 244 | if ($protocol == 'https') { |
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| 245 | $ssl_prefix = 'ssl://'; |
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| 246 | } else { |
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| 247 | $ssl_prefix = ''; |
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| 248 | } |
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| 249 | |||
| 250 | // Request-String festlegen |
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| 251 | $req = ''; |
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| 252 | for ($i=1; isset($cry[$i]); $i++) { |
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| 253 | $req .= '/'.$cry[$i]; |
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| 254 | } |
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| 255 | if ($req == '') $req = '/'; |
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| 256 | |||
| 257 | // Anfrage starten |
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| 258 | $fp = @fsockopen($ssl_prefix.$host, $port, $errno, $errstr, $this->time_out); |
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| 259 | if (!$fp) { |
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| 260 | if ($this->error_level >= HTTPC_ERRLVL_FATAL_ERRORS) { |
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| 261 | trigger_error("Could not open socket: '$errstr' ($errno)", E_USER_ERROR); |
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| 262 | } |
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| 263 | $result->error = HTTPC_ERROR_SOCKET; |
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| 264 | $result->error_info = "$errstr ($errno)"; |
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| 265 | return $result; |
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| 266 | } |
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| 267 | |||
| 268 | if ($this->use_post_method) { |
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| 269 | // Anmerkung: Es gab Fälle, bei denen PHP in eine Endlosschleife stieg, wenn man bei POST nicht einzelne puts() verwendet |
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| 270 | |||
| 271 | if ($this->use_old_http_protocol_version) { |
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| 272 | @fputs ($fp, "POST $req HTTP/1.0\r\n"); |
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| 273 | } else { |
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| 274 | @fputs ($fp, "POST $req HTTP/1.1\r\n"); |
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| 275 | @fputs ($fp, "Host: $host\r\n"); |
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| 276 | @fputs ($fp, "Connection: close\r\n"); |
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| 277 | } |
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| 278 | |||
| 279 | foreach ($this->additional_fields as $akey => $aval) { |
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| 280 | @fputs ($fp, "$akey: $aval\r\n"); |
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| 281 | } |
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| 282 | |||
| 283 | if ($data_to_send != '') { |
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| 284 | fputs($fp, "Content-length: ". strlen($data_to_send) ."\r\n"); |
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| 285 | } |
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| 286 | |||
| 287 | @fputs ($fp, "User-Agent: ".$this->user_agent."\r\n\r\n"); |
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| 288 | @fputs($fp, $data_to_send); |
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| 289 | } else { |
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| 290 | if ($this->use_old_http_protocol_version) { |
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| 291 | $request = "GET $req HTTP/1.0\r\n"; |
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| 292 | } else { |
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| 293 | $request = "GET $req HTTP/1.1\r\n"; |
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| 294 | $request .= "Host: $host\r\n"; |
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| 295 | $request .= "Connection: close\r\n"; |
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| 296 | } |
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| 297 | |||
| 298 | foreach ($this->additional_fields as $akey => $aval) { |
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| 299 | $request .= "$akey: $aval\r\n"; |
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| 300 | } |
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| 301 | |||
| 302 | if ($data_to_send != '') { |
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| 303 | fputs($fp, "Content-length: ". strlen($data_to_send) ."\r\n"); |
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| 304 | } |
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| 305 | |||
| 306 | $request .= "User-Agent: ".$this->user_agent."\r\n\r\n"; |
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| 307 | $request .= $data_to_send; |
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| 308 | |||
| 309 | @fputs ($fp, $request); |
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| 310 | } |
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| 311 | |||
| 312 | $tmp = ''; |
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| 313 | while (!@feof($fp)) { |
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| 314 | $tmp .= @fgets($fp,128); |
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| 315 | } |
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| 316 | @fclose($fp); |
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| 317 | |||
| 318 | // Die Kopfzeilen auswerten |
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| 319 | |||
| 320 | $result->header = $this->decode_header($tmp); |
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| 321 | |||
| 322 | if (isset($result->header['status'])) { |
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| 323 | $result->status_code = $result->header['status']; |
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| 324 | } else { |
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| 325 | // Das sollte niemals passieren ... |
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| 326 | |||
| 327 | if ($this->error_level >= HTTPC_ERRLVL_WARNINGS) { |
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| 328 | trigger_error("HTTP-Status-Code unknown!", E_USER_WARNING); |
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| 329 | } |
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| 330 | $result->error = HTTPC_WARNING_UNKNOWN_STATUS; |
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| 331 | $result->error_info = null; |
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| 332 | |||
| 333 | $result->status_code = 0; |
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| 334 | } |
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| 335 | |||
| 336 | // Fehler (Status-Klassen ab 4)? |
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| 337 | |||
| 338 | if ($this->get_error_class($result->status_code) >= 4) { |
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| 339 | if ($this->error_level >= HTTPC_ERRLVL_WARNINGS) { |
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| 340 | trigger_error("HTTP-Status-Code: '".$result->status_code."'!", E_USER_WARNING); |
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| 341 | } |
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| 342 | $result->error = HTTPC_WARNING_HTTP_STATUS_CODE; |
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| 343 | $result->error_info = $result->status_code; |
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| 344 | // Here NO return, since we also want to see the HTML-content of the error page |
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| 345 | } |
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| 346 | |||
| 347 | // Prüfen, ob eine Weiterleitung vorhanden ist. |
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| 348 | |||
| 349 | $location_vorhanden = ((isset($result->header['location'])) && ($result->header['location'] != '')); |
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| 350 | |||
| 351 | if ((($this->get_error_class($result->status_code) == 3) || ($result->status_code == 201)) && |
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| 352 | ($location_vorhanden)) { |
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| 353 | // Anmerkung: Laut RFC2616 ist das Feld "Location" scheinbar nur bei HTTP-Code 201 oder 3xx gültig. |
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| 354 | // Daher prüfe ich zusätzlich, ob der Statuscode 3xx oder 201 vorliegt. |
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| 355 | $weiterleitung = $result->header['location']; |
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| 356 | } else { |
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| 357 | $weiterleitung = null; |
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| 358 | |||
| 359 | if ($location_vorhanden) { |
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| 360 | // Das sollte eigentlich nicht passieren ... |
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| 361 | |||
| 362 | if ($this->error_level >= HTTPC_ERRLVL_WARNINGS) { |
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| 363 | trigger_error("A redirect was found but ignored because the status code '".$result->status_code."' did not allow it", E_USER_WARNING); |
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| 364 | } |
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| 365 | $result->error = HTTPC_WARNING_REDIRECT_IGNORED; |
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| 366 | $result->error_info = $result->header['location']." (".$result->status_code.")"; |
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| 367 | } |
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| 368 | } |
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| 369 | |||
| 370 | if (!is_null($weiterleitung)) { |
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| 371 | if (strpos($weiterleitung, '://') !== false) { |
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| 372 | // 1. Fall: http://www.example.com/test.php |
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| 373 | |||
| 374 | $url = $weiterleitung; |
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| 375 | } else if (substr($weiterleitung, 0, 2) == './') { |
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| 376 | // 2. Fall: ./test.php |
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| 377 | |||
| 378 | if (substr($req, strlen($req)-1, 1) != '/') { |
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| 379 | // Entweder ein Verzeichnis ohne / am Ende oder eine Datei |
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| 380 | // Letztes Element muss abgeschnitten werden |
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| 381 | $x = ''; |
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| 382 | $gry = explode('/', $req); |
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| 383 | for ($j=1; isset($gry[$j+1]); $j++) { |
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| 384 | $x .= '/'.$gry[$j]; |
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| 385 | } |
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| 386 | $x .= '/'; |
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| 387 | } else { |
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| 388 | $x = $req; |
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| 389 | } |
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| 390 | $x .= substr($weiterleitung, 2, strlen($weiterleitung)-2); |
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| 391 | |||
| 392 | $url = $protocol.'://'.$host.$x; |
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| 393 | } else if (substr($weiterleitung, 0, 1) == '/') { |
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| 394 | // 3. Fall: /test.php |
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| 395 | |||
| 396 | $x = $weiterleitung; |
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| 397 | |||
| 398 | $url = $protocol.'://'.$host.$x; |
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| 399 | } else { |
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| 400 | // 4. Fall: test.php (= ./test.php) |
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| 401 | |||
| 402 | $x = $req; |
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| 403 | if (substr($req, strlen($req)-1, 1) != '/') { |
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| 404 | // Entweder ein Verzeichnis ohne / am Ende oder eine Datei |
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| 405 | // Letztes Element muss abgeschnitten werden |
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| 406 | $x = ''; |
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| 407 | $gry = explode('/', $req); |
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| 408 | for ($j=1; isset($gry[$j+1]); $j++) { |
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| 409 | $x .= '/'.$gry[$j]; |
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| 410 | } |
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| 411 | $x .= '/'; |
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| 412 | } else { |
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| 413 | $x = $req; |
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| 414 | } |
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| 415 | $x .= $weiterleitung; |
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| 416 | |||
| 417 | $url = $protocol.'://'.$host.$x; |
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| 418 | } |
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| 419 | |||
| 420 | $result->header = null; |
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| 421 | $result->final_redirected_url = $url; |
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| 422 | } else { |
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| 423 | // Keine Weiterleitungen vorhanden |
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| 424 | |||
| 425 | // Content filtern |
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| 426 | $con = explode("\r\n\r\n", $tmp); |
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| 427 | $tmp = ''; |
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| 428 | for ($i=1; isset($con[$i]); $i++) { |
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| 429 | $tmp .= $con[$i]; |
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| 430 | if (isset($con[$i+1])) $tmp .= "\r\n\r\n"; |
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| 431 | } |
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| 432 | |||
| 433 | $result->content = $this->decode_body($result->header, $tmp); |
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| 434 | return $result; |
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| 435 | } |
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| 436 | } |
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| 437 | |||
| 438 | // Es wurde zu oft umgeleitet |
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| 439 | if ($this->error_level >= HTTPC_ERRLVL_FATAL_ERRORS) { |
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| 440 | trigger_error("Redirect limit of '".$this->redirect_limit."' at URL '".$url."' redirects exceeded", E_USER_ERROR); |
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| 441 | } |
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| 442 | $result->error = HTTPC_ERROR_TOO_MANY_REDIRECTS; |
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| 443 | $result->error_info = $this->redirect_limit; |
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| 444 | return $result; |
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| 445 | } |
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| 446 | } |
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| 447 | |||
| 448 | ?> |