Clementine-audio-player-Mac.../3rdparty/gloox/connectionbosh.cpp

642 lines
21 KiB
C++

/*
* Copyright (c) 2007-2009 by Jakob Schroeter <js@camaya.net>
* This file is part of the gloox library. http://camaya.net/gloox
*
* This software is distributed under a license. The full license
* agreement can be found in the file LICENSE in this distribution.
* This software may not be copied, modified, sold or distributed
* other than expressed in the named license agreement.
*
* This software is distributed without any warranty.
*/
#include "config.h"
#include "gloox.h"
#include "connectionbosh.h"
#include "logsink.h"
#include "prep.h"
#include "tag.h"
#include "util.h"
#include <string>
#include <cstdlib>
#include <cctype>
#include <algorithm>
namespace gloox
{
ConnectionBOSH::ConnectionBOSH( ConnectionBase* connection, const LogSink& logInstance,
const std::string& boshHost, const std::string& xmppServer,
int xmppPort )
: ConnectionBase( 0 ),
m_logInstance( logInstance ), m_parser( this ), m_boshHost( boshHost ), m_path( "/http-bind/" ),
m_rid( 0 ), m_initialStreamSent( false ), m_openRequests( 0 ),
m_maxOpenRequests( 2 ), m_wait( 30 ), m_hold( 2 ), m_streamRestart( false ),
m_lastRequestTime( std::time( 0 ) ), m_minTimePerRequest( 0 ), m_bufferContentLength( 0 ),
m_connMode( ModePipelining )
{
initInstance( connection, xmppServer, xmppPort );
}
ConnectionBOSH::ConnectionBOSH( ConnectionDataHandler* cdh, ConnectionBase* connection,
const LogSink& logInstance, const std::string& boshHost,
const std::string& xmppServer, int xmppPort )
: ConnectionBase( cdh ),
m_logInstance( logInstance ), m_parser( this ), m_boshHost( boshHost ), m_path( "/http-bind/" ),
m_rid( 0 ), m_initialStreamSent( false ), m_openRequests( 0 ),
m_maxOpenRequests( 2 ), m_wait( 30 ), m_hold( 2 ), m_streamRestart( false ),
m_lastRequestTime( std::time( 0 ) ), m_minTimePerRequest( 0 ), m_bufferContentLength( 0 ),
m_connMode( ModePipelining )
{
initInstance( connection, xmppServer, xmppPort );
}
void ConnectionBOSH::initInstance( ConnectionBase* connection, const std::string& xmppServer,
const int xmppPort )
{
// FIXME: check return value
prep::idna( xmppServer, m_server );
m_port = xmppPort;
if( m_port != -1 )
{
m_boshedHost = m_boshHost + ":" + util::int2string( m_port );
}
// drop this connection into our pool of available connections
if( connection )
{
connection->registerConnectionDataHandler( this );
m_connectionPool.push_back( connection );
}
}
ConnectionBOSH::~ConnectionBOSH()
{
util::clearList( m_activeConnections );
util::clearList( m_connectionPool );
}
ConnectionBase* ConnectionBOSH::newInstance() const
{
ConnectionBase* pBaseConn = 0;
if( !m_connectionPool.empty() )
{
pBaseConn = m_connectionPool.front()->newInstance();
}
else if( !m_activeConnections.empty() )
{
pBaseConn = m_activeConnections.front()->newInstance();
}
else
{
return 0;
}
return new ConnectionBOSH( m_handler, pBaseConn, m_logInstance,
m_boshHost, m_server, m_port );
}
ConnectionError ConnectionBOSH::connect()
{
if( m_state >= StateConnecting )
return ConnNoError;
if( !m_handler )
return ConnNotConnected;
m_state = StateConnecting;
m_logInstance.dbg( LogAreaClassConnectionBOSH,
"bosh initiating connection to server: " +
( ( m_connMode == ModePipelining ) ? std::string( "Pipelining" )
: ( ( m_connMode == ModeLegacyHTTP ) ? std::string( "LegacyHTTP" )
: std::string( "PersistentHTTP" ) ) ) );
getConnection();
return ConnNoError; // FIXME?
}
void ConnectionBOSH::disconnect()
{
if( ( m_connMode == ModePipelining && m_activeConnections.empty() )
|| ( m_connectionPool.empty() && m_activeConnections.empty() ) )
return;
if( m_state != StateDisconnected )
{
++m_rid;
std::string requestBody = "<body rid='" + util::int2string( m_rid ) + "' ";
requestBody += "sid='" + m_sid + "' ";
requestBody += "type='terminal' ";
requestBody += "xml:lang='en' ";
requestBody += "xmlns='" + XMLNS_HTTPBIND + "'";
if( m_sendBuffer.empty() ) // Make sure that any data in the send buffer gets sent
requestBody += "/>";
else
{
requestBody += ">" + m_sendBuffer + "</body>";
m_sendBuffer = EmptyString;
}
sendRequest( requestBody );
m_logInstance.dbg( LogAreaClassConnectionBOSH, "bosh disconnection request sent" );
}
else
{
m_logInstance.err( LogAreaClassConnectionBOSH,
"disconnecting from server in a non-graceful fashion" );
}
util::ForEach( m_activeConnections, &ConnectionBase::disconnect );
util::ForEach( m_connectionPool, &ConnectionBase::disconnect );
m_state = StateDisconnected;
if( m_handler )
m_handler->handleDisconnect( this, ConnUserDisconnected );
}
ConnectionError ConnectionBOSH::recv( int timeout )
{
if( m_state == StateDisconnected )
return ConnNotConnected;
if( !m_connectionPool.empty() )
m_connectionPool.front()->recv( 0 );
if( !m_activeConnections.empty() )
m_activeConnections.front()->recv( timeout );
// If there are no open requests then the spec allows us to send an empty request...
// (Some CMs do not obey this, it seems)
if( ( m_openRequests == 0 || m_sendBuffer.size() > 0 ) && m_state == StateConnected )
{
m_logInstance.dbg( LogAreaClassConnectionBOSH,
"Sending empty request (or there is data in the send buffer)" );
sendXML();
}
return ConnNoError; // FIXME?
}
bool ConnectionBOSH::send( const std::string& data )
{
if( m_state == StateDisconnected )
return false;
if( data.substr( 0, 2 ) == "<?" )
{
// if( m_initialStreamSent )
{
m_streamRestart = true;
sendXML();
return true;
}
// else
// {
// m_initialStreamSent = true;
// m_logInstance.dbg( LogAreaClassConnectionBOSH, "initial <stream:stream> dropped" );
// return true;
// }
}
else if( data == "</stream:stream>" )
return true;
m_sendBuffer += data;
sendXML();
return true;
}
/* Sends XML. Wraps data in a <body/> tag, and then passes to sendRequest(). */
bool ConnectionBOSH::sendXML()
{
if( m_state != StateConnected )
{
m_logInstance.warn( LogAreaClassConnectionBOSH,
"Data sent before connection established (will be buffered)" );
return false;
}
if( m_sendBuffer.empty() )
{
time_t now = time( 0 );
unsigned int delta = (int)(now - m_lastRequestTime);
if( delta < m_minTimePerRequest && m_openRequests > 0 )
{
m_logInstance.dbg( LogAreaClassConnectionBOSH, "Too little time between requests: " + util::int2string( delta ) + " seconds" );
return false;
}
m_logInstance.dbg( LogAreaClassConnectionBOSH, "Send buffer is empty, sending empty request" );
}
++m_rid;
std::string requestBody = "<body rid='" + util::int2string( m_rid ) + "' ";
requestBody += "sid='" + m_sid + "' ";
requestBody += "xmlns='" + XMLNS_HTTPBIND + "'";
if( m_streamRestart )
{
requestBody += " xmpp:restart='true' to='" + m_server + "' xml:lang='en' xmlns:xmpp='"
+ XMLNS_XMPP_BOSH + "' />";
m_logInstance.dbg( LogAreaClassConnectionBOSH, "Restarting stream" );
}
else
{
requestBody += ">" + m_sendBuffer + "</body>";
}
// Send a request. Force if we are not sending an empty request, or if there are no connections open
if( sendRequest( requestBody ) )
{
m_logInstance.dbg( LogAreaClassConnectionBOSH, "Successfully sent m_sendBuffer" );
m_sendBuffer = EmptyString;
m_streamRestart = false;
}
else
{
--m_rid; // I think... (may need to rethink when acks are implemented)
m_logInstance.warn( LogAreaClassConnectionBOSH,
"Unable to send. Connection not complete, or too many open requests,"
" so added to buffer.\n" );
}
return true;
}
/* Chooses the appropriate connection, or opens a new one if necessary. Wraps xml in HTTP and sends. */
bool ConnectionBOSH::sendRequest( const std::string& xml )
{
ConnectionBase* conn = getConnection();
if( !conn )
return false;
std::string request = "POST " + m_path;
if( m_connMode == ModeLegacyHTTP )
{
request += " HTTP/1.0\r\n";
request += "Connection: close\r\n";
}
else
request += " HTTP/1.1\r\n";
request += "Host: " + m_boshedHost + "\r\n";
request += "Content-Type: text/xml; charset=utf-8\r\n";
request += "Content-Length: " + util::int2string( xml.length() ) + "\r\n";
request += "User-Agent: gloox/" + GLOOX_VERSION + "\r\n\r\n";
request += xml;
if( conn->send( request ) )
{
m_lastRequestTime = time( 0 );
++m_openRequests;
return true;
}
// else // FIXME What to do in this case?
// printf( "Error while trying to send on socket (state: %d)\n", conn->state() );
return false;
}
bool ci_equal( char ch1, char ch2 )
{
return std::toupper( (unsigned char)ch1 ) == std::toupper( (unsigned char)ch2 );
}
std::string::size_type ci_find( const std::string& str1, const std::string& str2 )
{
std::string::const_iterator pos = std::search( str1.begin(), str1.end(),
str2.begin(), str2.end(), ci_equal );
if( pos == str1.end() )
return std::string::npos;
else
return std::distance( str1.begin(), pos );
}
const std::string ConnectionBOSH::getHTTPField( const std::string& field )
{
std::string::size_type fp = ci_find( m_bufferHeader, "\r\n" + field + ": " );
if( fp == std::string::npos )
return EmptyString;
fp += field.length() + 4;
const std::string::size_type fp2 = m_bufferHeader.find( "\r\n", fp );
if( fp2 == std::string::npos )
return EmptyString;
return m_bufferHeader.substr( fp, fp2 - fp );
}
ConnectionError ConnectionBOSH::receive()
{
ConnectionError err = ConnNoError;
while( m_state != StateDisconnected && ( err = recv( 10 ) ) == ConnNoError )
;
return err == ConnNoError ? ConnNotConnected : err;
}
void ConnectionBOSH::cleanup()
{
m_state = StateDisconnected;
util::ForEach( m_activeConnections, &ConnectionBase::cleanup );
util::ForEach( m_connectionPool, &ConnectionBase::cleanup );
}
void ConnectionBOSH::getStatistics( long int& totalIn, long int& totalOut )
{
util::ForEach( m_activeConnections, &ConnectionBase::getStatistics, totalIn, totalOut );
util::ForEach( m_connectionPool, &ConnectionBase::getStatistics, totalIn, totalOut );
}
void ConnectionBOSH::handleReceivedData( const ConnectionBase* /*connection*/,
const std::string& data )
{
m_buffer += data;
std::string::size_type headerLength = 0;
while( ( headerLength = m_buffer.find( "\r\n\r\n" ) ) != std::string::npos )
{
m_bufferHeader = m_buffer.substr( 0, headerLength+2 );
const std::string& statusCode = m_bufferHeader.substr( 9, 3 );
if( statusCode != "200" )
{
m_logInstance.warn( LogAreaClassConnectionBOSH,
"Received error via legacy HTTP status code: " + statusCode
+ ". Disconnecting." );
m_state = StateDisconnected; // As per XEP, consider connection broken
disconnect();
}
m_bufferContentLength = atol( getHTTPField( "Content-Length" ).c_str() );
if( !m_bufferContentLength )
return;
if( m_connMode != ModeLegacyHTTP && ( getHTTPField( "Connection" ) == "close"
|| m_bufferHeader.substr( 0, 8 ) == "HTTP/1.0" ) )
{
m_logInstance.dbg( LogAreaClassConnectionBOSH,
"Server indicated lack of support for HTTP/1.1 - falling back to HTTP/1.0" );
m_connMode = ModeLegacyHTTP;
}
if( m_buffer.length() >= ( headerLength + 4 + m_bufferContentLength ) )
{
putConnection();
--m_openRequests;
std::string xml = m_buffer.substr( headerLength + 4, m_bufferContentLength );
m_parser.feed( xml );
m_buffer.erase( 0, headerLength + 4 + m_bufferContentLength );
m_bufferContentLength = 0;
m_bufferHeader = EmptyString;
}
else
{
m_logInstance.warn( LogAreaClassConnectionBOSH, "buffer length mismatch" );
break;
}
}
}
void ConnectionBOSH::handleConnect( const ConnectionBase* /*connection*/ )
{
if( m_state == StateConnecting )
{
m_rid = rand() % 100000 + 1728679472;
Tag requestBody( "body" );
requestBody.setXmlns( XMLNS_HTTPBIND );
requestBody.setXmlns( XMLNS_XMPP_BOSH, "xmpp" );
requestBody.addAttribute( "content", "text/xml; charset=utf-8" );
requestBody.addAttribute( "hold", (long)m_hold );
requestBody.addAttribute( "rid", (long)m_rid );
requestBody.addAttribute( "ver", "1.6" );
requestBody.addAttribute( "wait", (long)m_wait );
requestBody.addAttribute( "ack", 0 );
requestBody.addAttribute( "secure", "false" );
requestBody.addAttribute( "route", "xmpp:" + m_server + ":5222" );
requestBody.addAttribute( "xml:lang", "en" );
requestBody.addAttribute( "xmpp:version", "1.0" );
requestBody.addAttribute( "to", m_server );
m_logInstance.dbg( LogAreaClassConnectionBOSH, "sending bosh connection request" );
sendRequest( requestBody.xml() );
}
}
void ConnectionBOSH::handleDisconnect( const ConnectionBase* /*connection*/,
ConnectionError reason )
{
if( m_handler && m_state == StateConnecting )
{
m_state = StateDisconnected;
m_handler->handleDisconnect( this, reason );
return;
}
switch( m_connMode ) // FIXME avoid that if we're disconnecting on purpose
{
case ModePipelining:
m_connMode = ModeLegacyHTTP; // Server seems not to support pipelining
m_logInstance.dbg( LogAreaClassConnectionBOSH,
"connection closed - falling back to HTTP/1.0 connection method" );
break;
case ModeLegacyHTTP:
case ModePersistentHTTP:
// FIXME do we need to do anything here?
// printf( "A TCP connection %p was disconnected (reason: %d).\n", connection, reason );
break;
}
}
void ConnectionBOSH::handleTag( Tag* tag )
{
if( !m_handler || tag->name() != "body" )
return;
if( m_streamRestart )
{
m_streamRestart = false;
m_logInstance.dbg( LogAreaClassConnectionBOSH, "sending spoofed <stream:stream>" );
m_handler->handleReceivedData( this, "<?xml version='1.0' ?>"
"<stream:stream xmlns:stream='http://etherx.jabber.org/streams'"
" xmlns='" + XMLNS_CLIENT + "' version='" + XMPP_STREAM_VERSION_MAJOR
+ "." + XMPP_STREAM_VERSION_MINOR + "' from='" + m_server + "' id ='"
+ m_sid + "' xml:lang='en'>" );
}
if( tag->hasAttribute( "sid" ) )
{
m_state = StateConnected;
m_sid = tag->findAttribute( "sid" );
if( tag->hasAttribute( "requests" ) )
{
const int serverRequests = atoi( tag->findAttribute( "requests" ).c_str() );
if( serverRequests < m_maxOpenRequests )
{
m_maxOpenRequests = serverRequests;
m_logInstance.dbg( LogAreaClassConnectionBOSH,
"bosh parameter 'requests' now set to " + tag->findAttribute( "requests" ) );
}
}
if( tag->hasAttribute( "hold" ) )
{
const int maxHold = atoi( tag->findAttribute( "hold" ).c_str() );
if( maxHold < m_hold )
{
m_hold = maxHold;
m_logInstance.dbg( LogAreaClassConnectionBOSH,
"bosh parameter 'hold' now set to " + tag->findAttribute( "hold" ) );
}
}
if( tag->hasAttribute( "wait" ) )
{
const int maxWait = atoi( tag->findAttribute( "wait" ).c_str() );
if( maxWait < m_wait )
{
m_wait = maxWait;
m_logInstance.dbg( LogAreaClassConnectionBOSH,
"bosh parameter 'wait' now set to " + tag->findAttribute( "wait" )
+ " seconds" );
}
}
if( tag->hasAttribute( "polling" ) )
{
const int minTime = atoi( tag->findAttribute( "polling" ).c_str() );
m_minTimePerRequest = minTime;
m_logInstance.dbg( LogAreaClassConnectionBOSH,
"bosh parameter 'polling' now set to " + tag->findAttribute( "polling" )
+ " seconds" );
}
if( m_state < StateConnected )
m_handler->handleConnect( this );
m_handler->handleReceivedData( this, "<?xml version='1.0' ?>" // FIXME move to send() so that
// it is more clearly a response
// to the initial stream opener?
"<stream:stream xmlns:stream='http://etherx.jabber.org/streams' "
"xmlns='" + XMLNS_CLIENT
+ "' version='" + XMPP_STREAM_VERSION_MAJOR + "." + XMPP_STREAM_VERSION_MINOR
+ "' from='" + m_server + "' id ='" + m_sid + "' xml:lang='en'>" );
}
if( tag->findAttribute( "type" ) == "terminate" )
{
m_logInstance.dbg( LogAreaClassConnectionBOSH,
"bosh connection closed by server: " + tag->findAttribute( "condition" ) );
m_state = StateDisconnected;
m_handler->handleDisconnect( this, ConnStreamClosed );
return;
}
const TagList& stanzas = tag->children();
TagList::const_iterator it = stanzas.begin();
for( ; it != stanzas.end(); ++it )
m_handler->handleReceivedData( this, (*it)->xml() );
}
ConnectionBase* ConnectionBOSH::getConnection()
{
if( m_openRequests > 0 && m_openRequests >= m_maxOpenRequests )
{
m_logInstance.warn( LogAreaClassConnectionBOSH,
"Too many requests already open. Cannot send." );
return 0;
}
ConnectionBase* conn = 0;
switch( m_connMode )
{
case ModePipelining:
if( !m_activeConnections.empty() )
{
m_logInstance.dbg( LogAreaClassConnectionBOSH, "Using default connection for Pipelining." );
return m_activeConnections.front();
}
else if( !m_connectionPool.empty() )
{
m_logInstance.warn( LogAreaClassConnectionBOSH,
"Pipelining selected, but no connection open. Opening one." );
return activateConnection();
}
else
m_logInstance.warn( LogAreaClassConnectionBOSH,
"No available connections to pipeline on." );
break;
case ModeLegacyHTTP:
case ModePersistentHTTP:
{
if( !m_connectionPool.empty() )
{
m_logInstance.dbg( LogAreaClassConnectionBOSH, "LegacyHTTP/PersistentHTTP selected, "
"using connection from pool." );
return activateConnection();
}
else if( !m_activeConnections.empty() )
{
m_logInstance.dbg( LogAreaClassConnectionBOSH, "No connections in pool, creating a new one." );
conn = m_activeConnections.front()->newInstance();
conn->registerConnectionDataHandler( this );
m_connectionPool.push_back( conn );
conn->connect();
}
else
m_logInstance.warn( LogAreaClassConnectionBOSH,
"No available connections to send on." );
break;
}
}
return 0;
}
ConnectionBase* ConnectionBOSH::activateConnection()
{
ConnectionBase* conn = m_connectionPool.front();
m_connectionPool.pop_front();
if( conn->state() == StateConnected )
{
m_activeConnections.push_back( conn );
return conn;
}
m_logInstance.dbg( LogAreaClassConnectionBOSH, "Connecting pooled connection." );
m_connectionPool.push_back( conn );
conn->connect();
return 0;
}
void ConnectionBOSH::putConnection()
{
ConnectionBase* conn = m_activeConnections.front();
switch( m_connMode )
{
case ModeLegacyHTTP:
m_logInstance.dbg( LogAreaClassConnectionBOSH, "Disconnecting LegacyHTTP connection" );
conn->disconnect();
conn->cleanup(); // This is necessary
m_activeConnections.pop_front();
m_connectionPool.push_back( conn );
break;
case ModePersistentHTTP:
m_logInstance.dbg( LogAreaClassConnectionBOSH, "Deactivating PersistentHTTP connection" );
m_activeConnections.pop_front();
m_connectionPool.push_back( conn );
break;
case ModePipelining:
m_logInstance.dbg( LogAreaClassConnectionBOSH, "Keeping Pipelining connection" );
default:
break;
}
}
}