Merge branch '0.9.x' into 1.0.x

1 files changed, 265 insertions, 0 deletions

diff --git a/plugins/TwitterBridge/jsonstreamreader.php b/plugins/TwitterBridge/jsonstreamreader.php
new file mode 100644
index 000000000..f6572c9ee
--- /dev/null
+++ b/plugins/TwitterBridge/jsonstreamreader.php
@@ -0,0 +1,265 @@
+<?php
+/**
+ * StatusNet, the distributed open-source microblogging tool
+ *
+ * PHP version 5
+ *
+ * LICENCE: This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * @category  Plugin
+ * @package   StatusNet
+ * @author    Brion Vibber <brion@status.net>
+ * @copyright 2010 StatusNet, Inc.
+ * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
+ * @link      http://status.net/
+ */
+
+class OAuthData
+{
+    public $consumer_key, $consumer_secret, $token, $token_secret;
+}
+
+/**
+ *
+ */
+abstract class JsonStreamReader
+{
+    const CRLF = "\r\n";
+
+    public $id;
+    protected $socket = null;
+    protected $state = 'init'; // 'init', 'connecting', 'waiting', 'headers', 'active'
+
+    public function __construct()
+    {
+        $this->id = get_class($this) . '.' . substr(md5(mt_rand()), 0, 8);
+    }
+
+    /**
+     * Starts asynchronous connect operation...
+     *
+     * @fixme Can we do the open-socket fully async to? (need write select infrastructure)
+     *
+     * @param string $url
+     */
+    public function connect($url)
+    {
+        common_log(LOG_DEBUG, "$this->id opening connection to $url");
+
+        $scheme = parse_url($url, PHP_URL_SCHEME);
+        if ($scheme == 'http') {
+            $rawScheme = 'tcp';
+        } else if ($scheme == 'https') {
+            $rawScheme = 'ssl';
+        } else {
+            throw new ServerException('Invalid URL scheme for HTTP stream reader');
+        }
+
+        $host = parse_url($url, PHP_URL_HOST);
+        $port = parse_url($url, PHP_URL_PORT);
+        if (!$port) {
+            if ($scheme == 'https') {
+                $port = 443;
+            } else {
+                $port = 80;
+            }
+        }
+
+        $path = parse_url($url, PHP_URL_PATH);
+        $query = parse_url($url, PHP_URL_QUERY);
+        if ($query) {
+            $path .= '?' . $query;
+        }
+
+        $errno = $errstr = null;
+        $timeout = 5;
+        //$flags = STREAM_CLIENT_CONNECT | STREAM_CLIENT_ASYNC_CONNECT;
+        $flags = STREAM_CLIENT_CONNECT;
+        // @fixme add SSL params
+        $this->socket = stream_socket_client("$rawScheme://$host:$port", $errno, $errstr, $timeout, $flags);
+
+        $this->send($this->httpOpen($host, $path));
+
+        stream_set_blocking($this->socket, false);
+        $this->state = 'waiting';
+    }
+
+    /**
+     * Send some fun data off to the server.
+     *
+     * @param string $buffer
+     */
+    function send($buffer)
+    {
+        fwrite($this->socket, $buffer);
+    }
+
+    /**
+     * Read next packet of data from the socket.
+     *
+     * @return string
+     */
+    function read()
+    {
+        $buffer = fread($this->socket, 65536);
+        return $buffer;
+    }
+
+    /**
+     * Build HTTP request headers.
+     *
+     * @param string $host
+     * @param string $path
+     * @return string
+     */
+    protected function httpOpen($host, $path)
+    {
+        $lines = array(
+            "GET $path HTTP/1.1",
+            "Host: $host",
+            "User-Agent: StatusNet/" . STATUSNET_VERSION . " (TwitterBridgePlugin)",
+            "Connection: close",
+            "",
+            ""
+        );
+        return implode(self::CRLF, $lines);
+    }
+
+    /**
+     * Close the current connection, if open.
+     */
+    public function close()
+    {
+        if ($this->isConnected()) {
+            common_log(LOG_DEBUG, "$this->id closing connection.");
+            fclose($this->socket);
+            $this->socket = null;
+        }
+    }
+
+    /**
+     * Are we currently connected?
+     *
+     * @return boolean
+     */
+    public function isConnected()
+    {
+        return $this->socket !== null;
+    }
+
+    /**
+     * Send any sockets we're listening on to the IO manager
+     * to wait for input.
+     *
+     * @return array of resources
+     */
+    public function getSockets()
+    {
+        if ($this->isConnected()) {
+            return array($this->socket);
+        }
+        return array();
+    }
+
+    /**
+     * Take a chunk of input over the horn and go go go! :D
+     *
+     * @param string $buffer
+     */
+    public function handleInput($socket)
+    {
+        if ($this->socket !== $socket) {
+            throw new Exception('Got input from unexpected socket!');
+        }
+
+        try {
+            $buffer = $this->read();
+            $lines = explode(self::CRLF, $buffer);
+            foreach ($lines as $line) {
+                $this->handleLine($line);
+            }
+        } catch (Exception $e) {
+            common_log(LOG_ERR, "$this->id aborting connection due to error: " . $e->getMessage());
+            fclose($this->socket);
+            throw $e;
+        }
+    }
+
+    protected function handleLine($line)
+    {
+        switch ($this->state)
+        {
+            case 'waiting':
+                $this->handleLineWaiting($line);
+                break;
+            case 'headers':
+                $this->handleLineHeaders($line);
+                break;
+            case 'active':
+                $this->handleLineActive($line);
+                break;
+            default:
+                throw new Exception('Invalid state in handleLine: ' . $this->state);
+        }
+    }
+
+    /**
+     *
+     * @param <type> $line
+     */
+    protected function handleLineWaiting($line)
+    {
+        $bits = explode(' ', $line, 3);
+        if (count($bits) != 3) {
+            throw new Exception("Invalid HTTP response line: $line");
+        }
+
+        list($http, $status, $text) = $bits;
+        if (substr($http, 0, 5) != 'HTTP/') {
+            throw new Exception("Invalid HTTP response line chunk '$http': $line");
+        }
+        if ($status != '200') {
+            throw new Exception("Bad HTTP response code $status: $line");
+        }
+        common_log(LOG_DEBUG, "$this->id $line");
+        $this->state = 'headers';
+    }
+
+    protected function handleLineHeaders($line)
+    {
+        if ($line == '') {
+            $this->state = 'active';
+            common_log(LOG_DEBUG, "$this->id connection is active!");
+        } else {
+            common_log(LOG_DEBUG, "$this->id read HTTP header: $line");
+            $this->responseHeaders[] = $line;
+        }
+    }
+
+    protected function handleLineActive($line)
+    {
+        if ($line == "") {
+            // Server sends empty lines as keepalive.
+            return;
+        }
+        $data = json_decode($line);
+        if ($data) {
+            $this->handleJson($data);
+        } else {
+            common_log(LOG_ERR, "$this->id received bogus JSON data: " . var_export($line, true));
+        }
+    }
+
+    abstract protected function handleJson(stdClass $data);
+}