void HttpConnectionHandler::onRequestArrive(HttpRequestHeader& header, string& body_str)
{
base::ErrorCode ec;
if (sp_stub_dispatcher_)
sp_stub_dispatcher_->invokeMethod(
boost::static_pointer_cast<HttpConnectionHandler>(this->shared_from_this()),
header, body_str, &ec);
else
ec = base::http::EC_HTTP_SERVICE_INTERNAL_ERROR;
if (ec)
{
sendErrorMessage(header, &ec);
LOG(error, "process request (" << header.getPath() << ") failed! " << ec);
close();
}
}
void ProxyResourceHandler::operator()(BtpAction* action)
{
// get request host
HttpRequestHeader* hrh = action->getRequest()->getHeader();
string host = hrh->getFieldValue("X-Forwarded-Host");
if(host.length() == 0)
{
host = hrh->getFieldValue("Host");
}
// find a rule
Rule* rule = findRule(action, host);
if(rule == NULL)
{
// delegate to rest resource handler
RestResourceHandler::operator()(action);
}
else
{
// get URL to proxy or redirect to
UrlRef url = rule->url;
// get url host
string urlHost;
HttpResponse* res = action->getResponse();
bool secure = res->getConnection()->isSecure();
// if URL has no host, reuse incoming host
if(url->getHost().length() == 0)
{
urlHost = host;
}
// if URL has no port or uses a default port number, only use URL host
else if(
(url->getPort() == 0) ||
(secure && url->getPort() == 443) ||
(!secure && url->getPort() == 80))
{
urlHost = url->getHost();
}
// use URL host and port
else
{
urlHost = url->getHostAndPort();
}
// handle 0.0.0.0 (any host) by replacing it with the request host
if(strncmp(urlHost.c_str(), "0.0.0.0", 8) == 0)
{
// 0.0.0.0 is 8 chars long
urlHost.replace(0, 8, host.substr(0, host.find(':')).c_str());
}
// rewrite the request path if it does not match URL path
string path = hrh->getPath();
if(strcmp(path.c_str(), url->getPath().c_str()) != 0)
{
// check for path wildcard
if(strcmp(rule->path, "*") == 0)
{
// since a wildcard is used, prepend the URL path to the
// resource (if the url path isn't '/')
string urlPath = url->getPath();
if(urlPath.length() > 1)
{
path.insert(0, url->getPath().c_str());
}
}
else
{
// replace the part of the resource that matched the proxy
// rule with the rewrite path from the proxy URL
path.replace(0, strlen(rule->path), url->getPath().c_str());
}
}
// do redirect if appropriate
if(rule->type == Rule::Redirect)
{
// set response code
HttpResponseHeader* header = res->getHeader();
if(rule->permanent)
{
header->setStatus(301, "Moved Permanently");
}
else
{
header->setStatus(302, "Found");
}
// build new location url
bool secure = res->getConnection()->isSecure();
header->setField("Location", StringTools::format("%s://%s%s",
secure ? "https" : "http", urlHost.c_str(), path.c_str()));
action->sendResult();
}
// do proxy
else if(rule->type == Rule::Proxy)
{
// get client-side request
HttpRequest* req = action->getRequest();
// do path rewrite
hrh->setPath(path.c_str());
// add X-Forwarded headers
hrh->appendFieldValue("X-Forwarded-For",
req->getConnection()->getRemoteAddress()->toString(true).c_str());
hrh->appendFieldValue("X-Forwarded-Host",
hrh->getFieldValue("Host").c_str());
hrh->appendFieldValue("X-Forwarded-Server",
SocketTools::getHostname().c_str());
// rewrite host if rule specifies it
if(rule->rewriteHost)
{
hrh->setField("Host", urlHost.c_str());
}
// do proxy:
MO_CAT_INFO(BM_NODE_CAT,
"ProxyResourceHandler proxying %s%s => %s%s",
host.c_str(), hrh->getPath(), urlHost.c_str(), path.c_str());
MO_CAT_DEBUG(BM_NODE_CAT,
"ProxyResourceHandler request header for %s%s => %s%s:\n%s",
host.c_str(), hrh->getPath(),
urlHost.c_str(), path.c_str(),
hrh->toString().c_str());
// get a connection
BtpClient* btpc = mNode->getMessenger()->getBtpClient();
HttpConnection* conn = btpc->createConnection(false, &(*url));
if(conn == NULL)
{
// send service unavailable
HttpResponseHeader* header = action->getResponse()->getHeader();
header->setStatus(503, "Service Unavailable");
string content =
"<!DOCTYPE HTML PUBLIC \"-//IETF//DTD HTML 2.0//EN\">\n"
"<html><head>\n"
"<title>503 Service Unavailable</title>\n"
"</head><body>\n"
"<h1>Service Unavailable</h1>\n"
"<p>The service was not available.</p>\n"
"</body></html>";
ByteBuffer b(content.length());
b.put(content.c_str(), content.length(), false);
ByteArrayInputStream bais(&b);
action->sendResult(&bais);
}
else
{
// proxy the client's request and receive server's header (by
// writing it into the client's response header)
HttpResponse* res = action->getResponse();
if(_proxyHttp(req->getHeader(), req->getConnection(), conn) &&
conn->receiveHeader(res->getHeader()))
{
// proxy the server's response, consider result sent
_proxyHttp(res->getHeader(), conn, req->getConnection());
action->setResultSent(true);
}
// close connection
conn->close();
// clean up
delete conn;
}
if(!action->isResultSent())
{
// send exception (client's fault if code < 500)
ExceptionRef e = Exception::get();
action->sendException(e, e->getCode() < 500);
}
}
}
}
void HttpConnectionServicer::serviceConnection(Connection* c)
{
// wrap connection, set default timeouts to 30 seconds
HttpConnection hc(c, false);
hc.setReadTimeout(30000);
hc.setWriteTimeout(30000);
// monitor connection
if(!mConnectionMonitor.isNull())
{
mConnectionMonitor->beforeServicingConnection(&hc);
}
// create request
HttpRequest* request = hc.createRequest();
HttpRequestHeader* reqHeader = request->getHeader();
// create response
HttpResponse* response = request->createResponse();
HttpResponseHeader* resHeader = response->getHeader();
// handle keep-alive (HTTP/1.1 keep-alive is on by default)
bool keepAlive = true;
bool noerror = true;
while(keepAlive && noerror)
{
// set defaults
resHeader->setVersion("HTTP/1.1");
resHeader->setDate();
resHeader->setField("Server", mServerName);
// monitor request waiting
if(!mConnectionMonitor.isNull())
{
mConnectionMonitor->beforeRequest(&hc);
}
// receive request header
if((noerror = request->receiveHeader()))
{
// begin new request state
hc.getRequestState()->beginRequest();
// monitor received request
if(!mConnectionMonitor.isNull())
{
mConnectionMonitor->beforeServicingRequest(
&hc, request, response);
}
// do request modification
if(mRequestModifier != NULL)
{
mRequestModifier->modifyRequest(request);
}
// check http version
bool version10 = (strcmp(reqHeader->getVersion(), "HTTP/1.0") == 0);
bool version11 = (strcmp(reqHeader->getVersion(), "HTTP/1.1") == 0);
// only version 1.0 and 1.1 supported
if(version10 || version11)
{
// set response version according to request version
resHeader->setVersion(reqHeader->getVersion());
// use proxy'd host field if one was used
// else use host field if one was used
string host;
if(reqHeader->getField("X-Forwarded-Host", host) ||
reqHeader->getField("Host", host))
{
resHeader->setField("Host", host);
}
// get connection header
string connHeader;
if(reqHeader->getField("Connection", connHeader))
{
if(strcasecmp(connHeader.c_str(), "close") == 0)
{
keepAlive = false;
}
else if(strcasecmp(connHeader.c_str(), "keep-alive") == 0)
{
keepAlive = true;
}
}
else if(version10)
{
// if HTTP/1.0 and no keep-alive header, keep-alive is off
keepAlive = false;
}
// get request path and normalize it
const char* inPath = reqHeader->getPath();
char outPath[strlen(inPath) + 2];
HttpRequestServicer::normalizePath(inPath, outPath);
// find appropriate request servicer for path
HttpRequestServicer* hrs = NULL;
// find secure/non-secure servicer
hrs = findRequestServicer(host, outPath, hc.isSecure());
if(hrs != NULL)
{
// service request
hrs->serviceRequest(request, response);
// turn off keep-alive if response has close connection field
if(keepAlive)
{
if(resHeader->getField("Connection", connHeader) &&
strcasecmp(connHeader.c_str(), "close") == 0)
{
keepAlive = false;
}
}
// if servicer closed connection, turn off keep-alive
if(keepAlive && c->isClosed())
{
keepAlive = false;
}
}
else
{
// no servicer, so send 404 Not Found
const char* html =
"<html><body><h2>404 Not Found</h2></body></html>";
resHeader->setStatus(404, "Not Found");
resHeader->setField("Content-Type", "text/html");
resHeader->setField("Content-Length", 48);
resHeader->setField("Connection", "close");
if((noerror = response->sendHeader()))
{
ByteArrayInputStream is(html, 48);
noerror = response->sendBody(&is);
}
}
}
else
{
// send 505 HTTP Version Not Supported
const char* html =
"<html><body>"
"<h2>505 HTTP Version Not Supported</h2>"
"</body></html>";
resHeader->setStatus(505, "HTTP Version Not Supported");
resHeader->setField("Content-Type", "text/html");
resHeader->setField("Content-Length", 65);
resHeader->setField("Connection", "close");
if((noerror = response->sendHeader()))
{
ByteArrayInputStream is(html, 65);
noerror = response->sendBody(&is);
}
}
// monitor serviced request
if(!mConnectionMonitor.isNull())
{
mConnectionMonitor->afterServicingRequest(
&hc, request, response);
}
}
else
{
// begin new request state
hc.getRequestState()->beginRequest();
// monitor request error
if(!mConnectionMonitor.isNull())
{
mConnectionMonitor->beforeRequestError(
&hc, request, response);
}
// exception occurred while receiving header
ExceptionRef e = Exception::get();
// if no header then drop through and close connection
if(e->isType("monarch.http.NoHeader"))
{
keepAlive = false;
}
// for bad header or request set 400
else if(e->isType("monarch.http.BadHeader") ||
e->isType("monarch.http.BadRequest"))
{
// send 400 Bad Request
const char* html =
"<html><body><h2>400 Bad Request</h2></body></html>";
response->getHeader()->setStatus(400, "Bad Request");
response->getHeader()->setField("Content-Type", "text/html");
response->getHeader()->setField("Content-Length", 50);
response->getHeader()->setField("Connection", "close");
if(response->sendHeader())
{
ByteArrayInputStream is(html, 50);
response->sendBody(&is);
}
}
// if the exception was an interruption, then send a 503
else if(e->isType("monarch.io.InterruptedException") ||
e->isType("monarch.rt.Interrupted"))
{
// send 503 Service Unavailable
const char* html =
"<html><body><h2>503 Service Unavailable</h2></body></html>";
resHeader->setStatus(503, "Service Unavailable");
resHeader->setField("Content-Type", "text/html");
resHeader->setField("Content-Length", 58);
resHeader->setField("Connection", "close");
if((noerror = response->sendHeader()))
{
ByteArrayInputStream is(html, 58);
noerror = response->sendBody(&is);
}
}
// if the exception was not a socket error then send an internal
// server error response
else if(!e->isType("monarch.net.Socket", true))
{
// send 500 Internal Server Error
const char* html =
"<html><body><h2>500 Internal Server Error</h2></body></html>";
resHeader->setStatus(500, "Internal Server Error");
resHeader->setField("Content-Type", "text/html");
resHeader->setField("Content-Length", 60);
resHeader->setField("Connection", "close");
if((noerror = response->sendHeader()))
{
ByteArrayInputStream is(html, 60);
noerror = response->sendBody(&is);
}
}
else
{
// log socket error
if(e->getDetails()->hasMember("error"))
{
// build error string
string error;
DynamicObjectIterator i =
e->getDetails()["error"].getIterator();
while(i->hasNext())
{
error.append(i->next()->getString());
if(i->hasNext())
{
error.push_back(',');
}
}
MO_CAT_ERROR(MO_HTTP_CAT,
"Connection error: ['%s','%s','%s']",
e->getMessage(), e->getType(), error.c_str());
}
else
{
MO_CAT_ERROR(MO_HTTP_CAT,
"Connection error: ['%s','%s']",
e->getMessage(), e->getType());
}
}
// monitor request error
if(!mConnectionMonitor.isNull())
{
mConnectionMonitor->afterRequestError(
&hc, request, response, e);
}
}
// monitor request
if(!mConnectionMonitor.isNull())
{
mConnectionMonitor->afterRequest(&hc);
}
if(keepAlive && noerror)
{
// set keep-alive timeout (defaults to 5 minutes)
hc.setReadTimeout(1000 * 60 * 5);
// clear request and response header fields
reqHeader->clearFields();
resHeader->clearFields();
resHeader->clearStatus();
}
}
// clean up request and response
delete request;
delete response;
// monitor connection
if(!mConnectionMonitor.isNull())
{
mConnectionMonitor->afterServicingConnection(&hc);
}
// close connection
hc.close();
}
