virtual void process(Message& m, AbstractMessagingPort* port) { while (true) { if (inShutdown()) { log() << "got request after shutdown()" << endl; break; } DbResponse dbresponse; { OperationContextImpl txn; assembleResponse(&txn, m, dbresponse, port->remote()); // txn must go out of scope here so that the operation cannot show up in // currentOp results after the response reaches the client. } if (dbresponse.response) { port->reply(m, *dbresponse.response, dbresponse.responseTo); if (dbresponse.exhaustNS.size() > 0) { MsgData::View header = dbresponse.response->header(); QueryResult::View qr = header.view2ptr(); long long cursorid = qr.getCursorId(); if (cursorid) { verify(dbresponse.exhaustNS.size() && dbresponse.exhaustNS[0]); string ns = dbresponse.exhaustNS; // before reset() free's it... m.reset(); BufBuilder b(512); b.appendNum((int)0 /*size set later in appendData()*/); b.appendNum(header.getId()); b.appendNum(header.getResponseTo()); b.appendNum((int)dbGetMore); b.appendNum((int)0); b.appendStr(ns); b.appendNum((int)0); // ntoreturn b.appendNum(cursorid); m.appendData(b.buf(), b.len()); b.decouple(); DEV log() << "exhaust=true sending more" << endl; continue; // this goes back to top loop } } } break; } }
virtual void process( Message& m , AbstractMessagingPort* port , LastError * le) { boost::scoped_ptr<OperationContext> txn(new OperationContextImpl()); while ( true ) { if ( inShutdown() ) { log() << "got request after shutdown()" << endl; break; } lastError.startRequest( m , le ); DbResponse dbresponse; assembleResponse( txn.get(), m, dbresponse, port->remote() ); if ( dbresponse.response ) { port->reply(m, *dbresponse.response, dbresponse.responseTo); if( dbresponse.exhaustNS.size() > 0 ) { MsgData::View header = dbresponse.response->header(); QueryResult::View qr = header.view2ptr(); long long cursorid = qr.getCursorId(); if( cursorid ) { verify( dbresponse.exhaustNS.size() && dbresponse.exhaustNS[0] ); string ns = dbresponse.exhaustNS; // before reset() free's it... m.reset(); BufBuilder b(512); b.appendNum((int) 0 /*size set later in appendData()*/); b.appendNum(header.getId()); b.appendNum(header.getResponseTo()); b.appendNum((int) dbGetMore); b.appendNum((int) 0); b.appendStr(ns); b.appendNum((int) 0); // ntoreturn b.appendNum(cursorid); m.appendData(b.buf(), b.len()); b.decouple(); DEV log() << "exhaust=true sending more" << endl; continue; // this goes back to top loop } } } break; } }
bool MessagingPort::recv(Message& m) { try { #ifdef MONGO_CONFIG_SSL again: #endif // mmm( log() << "* recv() sock:" << this->sock << endl; ) MSGHEADER::Value header; int headerLen = sizeof(MSGHEADER::Value); psock->recv((char*)&header, headerLen); int len = header.constView().getMessageLength(); if (len == 542393671) { // an http GET string msg = "It looks like you are trying to access MongoDB over HTTP on the native driver " "port.\n"; LOG(psock->getLogLevel()) << msg; std::stringstream ss; ss << "HTTP/1.0 200 OK\r\nConnection: close\r\nContent-Type: " "text/plain\r\nContent-Length: " << msg.size() << "\r\n\r\n" << msg; string s = ss.str(); send(s.c_str(), s.size(), "http"); return false; } // If responseTo is not 0 or -1 for first packet assume SSL else if (psock->isAwaitingHandshake()) { #ifndef MONGO_CONFIG_SSL if (header.constView().getResponseTo() != 0 && header.constView().getResponseTo() != -1) { uasserted(17133, "SSL handshake requested, SSL feature not available in this build"); } #else if (header.constView().getResponseTo() != 0 && header.constView().getResponseTo() != -1) { uassert(17132, "SSL handshake received but server is started without SSL support", sslGlobalParams.sslMode.load() != SSLParams::SSLMode_disabled); setX509SubjectName( psock->doSSLHandshake(reinterpret_cast<const char*>(&header), sizeof(header))); psock->setHandshakeReceived(); goto again; } uassert(17189, "The server is configured to only allow SSL connections", sslGlobalParams.sslMode.load() != SSLParams::SSLMode_requireSSL); #endif // MONGO_CONFIG_SSL } if (static_cast<size_t>(len) < sizeof(MSGHEADER::Value) || static_cast<size_t>(len) > MaxMessageSizeBytes) { LOG(0) << "recv(): message len " << len << " is invalid. " << "Min " << sizeof(MSGHEADER::Value) << " Max: " << MaxMessageSizeBytes; return false; } psock->setHandshakeReceived(); int z = (len + 1023) & 0xfffffc00; verify(z >= len); MsgData::View md = reinterpret_cast<char*>(mongolMalloc(z)); ScopeGuard guard = MakeGuard(free, md.view2ptr()); verify(md.view2ptr()); memcpy(md.view2ptr(), &header, headerLen); int left = len - headerLen; psock->recv(md.data(), left); guard.Dismiss(); m.setData(md.view2ptr(), true); return true; } catch (const SocketException& e) { logger::LogSeverity severity = psock->getLogLevel(); if (!e.shouldPrint()) severity = severity.lessSevere(); LOG(severity) << "SocketException: remote: " << remote() << " error: " << e; m.reset(); return false; } }
void operator()() const { DBClientConnection dest; string errmsg; Timer connectTimer; while (!dest.connect(HostAndPort(mongoBridgeGlobalParams.destUri), errmsg)) { // If we can't connect for the configured timeout, give up // if (connectTimer.seconds() >= mongoBridgeGlobalParams.connectTimeoutSec) { cout << "Unable to establish connection from " << mp_.psock->remoteString() << " to " << mongoBridgeGlobalParams.destUri << " after " << connectTimer.seconds() << " seconds. Giving up." << endl; mp_.shutdown(); return; } sleepmillis(500); } Message m; while( 1 ) { try { m.reset(); if ( !mp_.recv( m ) ) { cout << "end connection " << mp_.psock->remoteString() << endl; mp_.shutdown(); break; } sleepmillis(mongoBridgeGlobalParams.delay); int oldId = m.header().getId(); if ( m.operation() == dbQuery || m.operation() == dbMsg || m.operation() == dbGetMore ) { bool exhaust = false; if ( m.operation() == dbQuery ) { DbMessage d( m ); QueryMessage q( d ); exhaust = q.queryOptions & QueryOption_Exhaust; } Message response; dest.port().call( m, response ); // nothing to reply with? if ( response.empty() ) cleanup(0); mp_.reply( m, response, oldId ); while ( exhaust ) { MsgData::View header = response.header(); QueryResult::View qr = header.view2ptr(); if ( qr.getCursorId() ) { response.reset(); dest.port().recv( response ); mp_.reply( m, response ); // m argument is ignored anyway } else { exhaust = false; } } } else { dest.port().say( m, oldId ); } } catch ( ... ) { log() << "caught exception in Forwarder, continuing" << endl; } } }