4424: add HTTPRequest class that supports cookies and redirects without fopen() or...

See also AContent issue #4875 for identical fix there

diff --git a/include/classes/HTTPRequest.class.php b/include/classes/HTTPRequest.class.php
new file mode 100644 (file)
index 0000000..68a38b0
--- /dev/null
+++ b/include/classes/HTTPRequest.class.php
@@ -0,0 +1,125 @@
+<?php
+# Simple class to fetch a HTTP URL. Supports "Location:"-redirections. Useful for servers with allow_url_fopen=false. Works with SSL-secured hosts.
+# From http://www.php.net/manual/en/function.fopen.php#58099
+# Updated by TJ <linux@tjworld.net> to support cookies
+# usage:
+# $r = new HTTPRequest('http://www.example.com', $cookie_array);
+# echo $r->DownloadToString();
+
+class HTTPRequest
+{
+    var $_fp;        // HTTP socket
+    var $_url;        // full URL
+    var $_host;        // HTTP host
+    var $_protocol;    // protocol (HTTP/HTTPS)
+    var $_uri;        // request URI
+    var $_port;        // port
+    var $_cookies = array();    // array of cookies
+
+    // scan url
+    function _scan_url()
+    {
+        $req = $this->_url;
+
+        $pos = strpos($req, '://');
+        $this->_protocol = strtolower(substr($req, 0, $pos));
+
+        $req = substr($req, $pos+3);
+        $pos = strpos($req, '/');
+        if($pos === false)
+            $pos = strlen($req);
+        $host = substr($req, 0, $pos);
+
+        if(strpos($host, ':') !== false)
+        {
+            list($this->_host, $this->_port) = explode(':', $host);
+        }
+        else
+        {
+            $this->_host = $host;
+            $this->_port = ($this->_protocol == 'https') ? 443 : 80;
+        }
+
+        $this->_uri = substr($req, $pos);
+        if($this->_uri == '')
+            $this->_uri = '/';
+    }
+
+    // constructor
+    function HTTPRequest($url, $cookies)
+    {
+        $this->_url = $url;
+        $this->_scan_url();
+        $this->_cookies = $cookies;
+               trigger_error("HTTPRequest(\"" . $url . "\"");
+               foreach($cookies as $key => $value) {
+                       trigger_error("Cookie: " . $key . "=" . $value );
+               }
+    }
+
+    // download URL to string
+    function DownloadToString()
+    {
+        $crlf = "\r\n";
+
+        // generate request
+        $req = 'GET ' . $this->_uri . ' HTTP/1.0' . $crlf
+            .  'Host: ' . $this->_host . $crlf;
+
+        // add cookies if any exist
+        if(count($this->_cookies)) {
+            $req .= "Cookie: ";
+            foreach($this->_cookies as $key => $value) {
+               $req .= $key . "=" . $value . "; ";
+            }
+            $req .= $crlf;
+        }
+        $req .=  $crlf;
+
+        // fetch
+        $this->_fp = fsockopen(($this->_protocol == 'https' ? 'ssl://' : '') . $this->_host, $this->_port);
+        fwrite($this->_fp, $req);
+        $response = '';
+        while(is_resource($this->_fp) && $this->_fp && !feof($this->_fp))
+            $response .= fread($this->_fp, 1024);
+        fclose($this->_fp);
+
+        // split header and body
+        $pos = strpos($response, $crlf . $crlf);
+        if($pos === false)
+            return($response);
+        $header = substr($response, 0, $pos);
+        $body = substr($response, $pos + 2 * strlen($crlf));
+
+        // parse headers
+        $headers = array();
+        $lines = explode($crlf, $header);
+        foreach($lines as $line) {
+            if(($pos = strpos($line, ':')) !== false) {
+                $key = strtolower(trim(substr($line, 0, $pos)));
+                $value = trim(substr($line, $pos+1));
+                $headers[$key] = $value;
+                if(strcmp($key, "set-cookie") == 0) {
+                    if(($pos = strpos($value, '=')) !== false) {
+                        $key = trim(substr($value, 0, $pos));
+                        $value = trim(substr($value, $pos+1));
+                        $this->_cookies[$key] = $value;
+                    }
+                }
+            }
+        }
+
+        // redirection?
+        if(isset($headers['location']))
+        {
+            $http = new HTTPRequest($headers['location'], $this->_cookies);
+            return($http->DownloadToString());
+        }
+        else
+        {
+            return($body);
+        }
+    }
+}
+?>
+