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/*
* Copyright (c) 2011 Thilo Cestonaro
* Licensed under the simplified BSD license.
* See Documentation/Licenses/BSD-simplified.txt for more information.
*/
/*
* Copyright (c) 2011 Kevin Smith
* Licensed under the GNU General Public License v3.
* See Documentation/Licenses/GPLv3.txt for more information.
*/
#include <Swiften/Network/BOSHConnection.h>
#include <boost/bind.hpp>
#include <boost/thread.hpp>
#include <boost/lexical_cast.hpp>
#include <string>
#include <Swiften/Network/ConnectionFactory.h>
#include <Swiften/Base/Log.h>
#include <Swiften/Base/String.h>
#include <Swiften/Base/Concat.h>
#include <Swiften/Base/ByteArray.h>
#include <Swiften/Network/HostAddressPort.h>
#include <Swiften/Network/TLSConnection.h>
#include <Swiften/Parser/BOSHBodyExtractor.h>
namespace Swift {
BOSHConnection::BOSHConnection(const URL& boshURL, ConnectionFactory* connectionFactory, XMLParserFactory* parserFactory, TLSContextFactory* tlsFactory)
: boshURL_(boshURL),
connectionFactory_(connectionFactory),
parserFactory_(parserFactory),
sid_(),
waitingForStartResponse_(false),
pending_(false),
tlsFactory_(tlsFactory),
connectionReady_(false)
{
}
BOSHConnection::~BOSHConnection() {
if (connection_) {
connection_->onConnectFinished.disconnect(boost::bind(&BOSHConnection::handleConnectionConnectFinished, shared_from_this(), _1));
connection_->onDataRead.disconnect(boost::bind(&BOSHConnection::handleDataRead, shared_from_this(), _1));
connection_->onDisconnected.disconnect(boost::bind(&BOSHConnection::handleDisconnected, shared_from_this(), _1));
}
disconnect();
}
void BOSHConnection::connect() {
Connection::ref rawConnection = connectionFactory_->createConnection();
connection_ = (boshURL_.getScheme() == "https") ? boost::make_shared<TLSConnection>(rawConnection, tlsFactory_) : rawConnection;
connection_->onConnectFinished.connect(boost::bind(&BOSHConnection::handleConnectionConnectFinished, shared_from_this(), _1));
connection_->onDataRead.connect(boost::bind(&BOSHConnection::handleDataRead, shared_from_this(), _1));
connection_->onDisconnected.connect(boost::bind(&BOSHConnection::handleDisconnected, shared_from_this(), _1));
connection_->connect(HostAddressPort(HostAddress(boshURL_.getHost()), boshURL_.getPort()));
}
void BOSHConnection::disconnect() {
if(connection_) {
connection_->disconnect();
sid_ = "";
}
}
void BOSHConnection::restartStream() {
write(createSafeByteArray(""), true, false);
}
void BOSHConnection::terminateStream() {
write(createSafeByteArray(""), false, true);
}
void BOSHConnection::write(const SafeByteArray& data) {
write(data, false, false);
}
std::pair<SafeByteArray, size_t> BOSHConnection::createHTTPRequest(const SafeByteArray& data, bool streamRestart, bool terminate, long rid, const std::string& sid, const URL& boshURL) {
size_t size;
std::stringstream content;
SafeByteArray contentTail = createSafeByteArray("</body>");
std::stringstream header;
content << "<body rid='" << rid << "' sid='" << sid << "'";
if (streamRestart) {
content << " xmpp:restart='true' xmlns:xmpp='urn:xmpp:xbosh'";
}
if (terminate) {
content << " type='terminate'";
}
content << " xmlns='http://jabber.org/protocol/httpbind'>";
SafeByteArray safeContent = createSafeByteArray(content.str());
safeContent.insert(safeContent.end(), data.begin(), data.end());
safeContent.insert(safeContent.end(), contentTail.begin(), contentTail.end());
size = safeContent.size();
header << "POST /" << boshURL.getPath() << " HTTP/1.1\r\n"
<< "Host: " << boshURL.getHost() << ":" << boshURL.getPort() << "\r\n"
/*<< "Accept-Encoding: deflate\r\n"*/
<< "Content-Type: text/xml; charset=utf-8\r\n"
<< "Content-Length: " << size << "\r\n\r\n";
SafeByteArray safeHeader = createSafeByteArray(header.str());
safeHeader.insert(safeHeader.end(), safeContent.begin(), safeContent.end());
return std::pair<SafeByteArray, size_t>(safeHeader, size);
}
void BOSHConnection::write(const SafeByteArray& data, bool streamRestart, bool terminate) {
assert(connectionReady_);
assert(!sid_.empty());
SafeByteArray safeHeader = createHTTPRequest(data, streamRestart, terminate, rid_, sid_, boshURL_).first;
onBOSHDataWritten(safeHeader);
connection_->write(safeHeader);
pending_ = true;
SWIFT_LOG(debug) << "write data: " << safeByteArrayToString(safeHeader) << std::endl;
}
void BOSHConnection::handleConnectionConnectFinished(bool error) {
connection_->onConnectFinished.disconnect(boost::bind(&BOSHConnection::handleConnectionConnectFinished, shared_from_this(), _1));
connectionReady_ = !error;
onConnectFinished(error);
}
void BOSHConnection::startStream(const std::string& to, unsigned long rid) {
assert(connectionReady_);
// Session Creation Request
std::stringstream content;
std::stringstream header;
content << "<body content='text/xml; charset=utf-8'"
<< " hold='1'"
<< " to='" << to << "'"
<< " rid='" << rid << "'"
<< " ver='1.6'"
<< " wait='60'" /* FIXME: we probably want this configurable*/
/*<< " ack='0'" FIXME: support acks */
<< " xml:lang='en'"
<< " xmlns:xmpp='urn:xmpp:bosh'"
<< " xmpp:version='1.0'"
<< " xmlns='http://jabber.org/protocol/httpbind' />";
std::string contentString = content.str();
header << "POST /" << boshURL_.getPath() << " HTTP/1.1\r\n"
<< "Host: " << boshURL_.getHost() << ":" << boshURL_.getPort() << "\r\n"
/*<< "Accept-Encoding: deflate\r\n"*/
<< "Content-Type: text/xml; charset=utf-8\r\n"
<< "Content-Length: " << contentString.size() << "\r\n\r\n"
<< contentString;
waitingForStartResponse_ = true;
SafeByteArray safeHeader = createSafeByteArray(header.str());
onBOSHDataWritten(safeHeader);
connection_->write(safeHeader);
SWIFT_LOG(debug) << "write stream header: " << safeByteArrayToString(safeHeader) << std::endl;
}
void BOSHConnection::handleDataRead(boost::shared_ptr<SafeByteArray> data) {
onBOSHDataRead(*data);
buffer_ = concat(buffer_, *data);
std::string response = safeByteArrayToString(buffer_);
if (response.find("\r\n\r\n") == std::string::npos) {
onBOSHDataRead(createSafeByteArray("[[Previous read incomplete, pending]]"));
return;
}
std::string httpCode = response.substr(response.find(" ") + 1, 3);
if (httpCode != "200") {
onHTTPError(httpCode);
return;
}
BOSHBodyExtractor parser(parserFactory_, createByteArray(response.substr(response.find("\r\n\r\n") + 4)));
if (parser.getBody()) {
if (parser.getBody()->attributes.getAttribute("type") == "terminate") {
BOSHError::Type errorType = parseTerminationCondition(parser.getBody()->attributes.getAttribute("condition"));
onSessionTerminated(errorType == BOSHError::NoError ? boost::shared_ptr<BOSHError>() : boost::make_shared<BOSHError>(errorType));
}
buffer_.clear();
if (waitingForStartResponse_) {
waitingForStartResponse_ = false;
sid_ = parser.getBody()->attributes.getAttribute("sid");
std::string requestsString = parser.getBody()->attributes.getAttribute("requests");
int requests = 2;
if (!requestsString.empty()) {
try {
requests = boost::lexical_cast<size_t>(requestsString);
}
catch (const boost::bad_lexical_cast&) {
}
}
onSessionStarted(sid_, requests);
}
SafeByteArray payload = createSafeByteArray(parser.getBody()->content);
/* Say we're good to go again, so don't add anything after here in the method */
pending_ = false;
onXMPPDataRead(payload);
}
}
BOSHError::Type BOSHConnection::parseTerminationCondition(const std::string& text) {
BOSHError::Type condition = BOSHError::UndefinedCondition;
if (text == "bad-request") {
condition = BOSHError::BadRequest;
}
else if (text == "host-gone") {
condition = BOSHError::HostGone;
}
else if (text == "host-unknown") {
condition = BOSHError::HostUnknown;
}
else if (text == "improper-addressing") {
condition = BOSHError::ImproperAddressing;
}
else if (text == "internal-server-error") {
condition = BOSHError::InternalServerError;
}
else if (text == "item-not-found") {
condition = BOSHError::ItemNotFound;
}
else if (text == "other-request") {
condition = BOSHError::OtherRequest;
}
else if (text == "policy-violation") {
condition = BOSHError::PolicyViolation;
}
else if (text == "remote-connection-failed") {
condition = BOSHError::RemoteConnectionFailed;
}
else if (text == "remote-stream-error") {
condition = BOSHError::RemoteStreamError;
}
else if (text == "see-other-uri") {
condition = BOSHError::SeeOtherURI;
}
else if (text == "system-shutdown") {
condition = BOSHError::SystemShutdown;
}
else if (text == "") {
condition = BOSHError::NoError;
}
return condition;
}
const std::string& BOSHConnection::getSID() {
return sid_;
}
void BOSHConnection::setRID(unsigned long long rid) {
rid_ = rid;
}
void BOSHConnection::setSID(const std::string& sid) {
sid_ = sid;
}
void BOSHConnection::handleDisconnected(const boost::optional<Connection::Error>& error) {
onDisconnected(error);
sid_ = "";
connectionReady_ = false;
}
bool BOSHConnection::isReadyToSend() {
/* Without pipelining you need to not send more without first receiving the response */
/* With pipelining you can. Assuming we can't, here */
return connectionReady_ && !pending_ && !waitingForStartResponse_ && !sid_.empty();
}
}
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Swift