mirror of https://github.com/Icinga/icinga2.git
270 lines
8.6 KiB
C++
270 lines
8.6 KiB
C++
/******************************************************************************
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* Icinga 2 *
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* Copyright (C) 2012-2017 Icinga Development Team (https://www.icinga.com/) *
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* *
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* This program is free software; you can redistribute it and/or *
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* modify it under the terms of the GNU General Public License *
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* as published by the Free Software Foundation; either version 2 *
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* of the License, or (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, write to the Free Software Foundation *
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. *
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******************************************************************************/
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#include "remote/httpserverconnection.hpp"
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#include "remote/httphandler.hpp"
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#include "remote/httputility.hpp"
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#include "remote/apilistener.hpp"
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#include "remote/apifunction.hpp"
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#include "remote/jsonrpc.hpp"
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#include "base/base64.hpp"
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#include "base/configtype.hpp"
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#include "base/objectlock.hpp"
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#include "base/utility.hpp"
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#include "base/logger.hpp"
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#include "base/exception.hpp"
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#include "base/convert.hpp"
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#include <boost/thread/once.hpp>
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using namespace icinga;
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static boost::once_flag l_HttpServerConnectionOnceFlag = BOOST_ONCE_INIT;
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static Timer::Ptr l_HttpServerConnectionTimeoutTimer;
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HttpServerConnection::HttpServerConnection(const String& identity, bool authenticated, const TlsStream::Ptr& stream)
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: m_Stream(stream), m_Seen(Utility::GetTime()), m_CurrentRequest(stream), m_PendingRequests(0)
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{
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boost::call_once(l_HttpServerConnectionOnceFlag, &HttpServerConnection::StaticInitialize);
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m_RequestQueue.SetName("HttpServerConnection");
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if (authenticated)
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m_ApiUser = ApiUser::GetByClientCN(identity);
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}
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void HttpServerConnection::StaticInitialize(void)
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{
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l_HttpServerConnectionTimeoutTimer = new Timer();
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l_HttpServerConnectionTimeoutTimer->OnTimerExpired.connect(boost::bind(&HttpServerConnection::TimeoutTimerHandler));
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l_HttpServerConnectionTimeoutTimer->SetInterval(15);
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l_HttpServerConnectionTimeoutTimer->Start();
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}
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void HttpServerConnection::Start(void)
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{
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/* the stream holds an owning reference to this object through the callback we're registering here */
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m_Stream->RegisterDataHandler(boost::bind(&HttpServerConnection::DataAvailableHandler, HttpServerConnection::Ptr(this)));
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if (m_Stream->IsDataAvailable())
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DataAvailableHandler();
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}
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ApiUser::Ptr HttpServerConnection::GetApiUser(void) const
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{
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return m_ApiUser;
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}
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TlsStream::Ptr HttpServerConnection::GetStream(void) const
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{
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return m_Stream;
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}
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void HttpServerConnection::Disconnect(void)
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{
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Log(LogDebug, "HttpServerConnection", "Http client disconnected");
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ApiListener::Ptr listener = ApiListener::GetInstance();
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listener->RemoveHttpClient(this);
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m_CurrentRequest.~HttpRequest();
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new (&m_CurrentRequest) HttpRequest(Stream::Ptr());
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m_Stream->Close();
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}
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bool HttpServerConnection::ProcessMessage(void)
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{
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bool res;
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try {
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res = m_CurrentRequest.Parse(m_Context, false);
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} catch (const std::invalid_argument& ex) {
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HttpResponse response(m_Stream, m_CurrentRequest);
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response.SetStatus(400, "Bad request");
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String msg = String("<h1>Bad request</h1><p><pre>") + ex.what() + "</pre></p>";
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response.WriteBody(msg.CStr(), msg.GetLength());
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response.Finish();
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m_Stream->Shutdown();
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return false;
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} catch (const std::exception& ex) {
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HttpResponse response(m_Stream, m_CurrentRequest);
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response.SetStatus(400, "Bad request");
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String msg = "<h1>Bad request</h1><p><pre>" + DiagnosticInformation(ex) + "</pre></p>";
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response.WriteBody(msg.CStr(), msg.GetLength());
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response.Finish();
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m_Stream->Shutdown();
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return false;
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}
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if (m_CurrentRequest.Complete) {
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m_RequestQueue.Enqueue(boost::bind(&HttpServerConnection::ProcessMessageAsync,
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HttpServerConnection::Ptr(this), m_CurrentRequest));
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m_Seen = Utility::GetTime();
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m_PendingRequests++;
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m_CurrentRequest.~HttpRequest();
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new (&m_CurrentRequest) HttpRequest(m_Stream);
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return true;
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}
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return res;
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}
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void HttpServerConnection::ProcessMessageAsync(HttpRequest& request)
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{
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String auth_header = request.Headers->Get("authorization");
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String::SizeType pos = auth_header.FindFirstOf(" ");
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String username, password;
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if (pos != String::NPos && auth_header.SubStr(0, pos) == "Basic") {
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String credentials_base64 = auth_header.SubStr(pos + 1);
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String credentials = Base64::Decode(credentials_base64);
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String::SizeType cpos = credentials.FindFirstOf(":");
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if (cpos != String::NPos) {
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username = credentials.SubStr(0, cpos);
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password = credentials.SubStr(cpos + 1);
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}
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}
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ApiUser::Ptr user;
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/* client_cn matched. */
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if (m_ApiUser)
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user = m_ApiUser;
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else {
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user = ApiUser::GetByName(username);
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/* Deny authentication if 1) given password is empty 2) configured password does not match. */
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if (password.IsEmpty())
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user.reset();
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else if (user && user->GetPassword() != password)
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user.reset();
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}
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String requestUrl = request.RequestUrl->Format();
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Log(LogInformation, "HttpServerConnection")
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<< "Request: " << request.RequestMethod << " " << requestUrl
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<< " (from " << m_Stream->GetSocket()->GetPeerAddress() << ", user: " << (user ? user->GetName() : "<unauthenticated>") << ")";
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HttpResponse response(m_Stream, request);
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String accept_header = request.Headers->Get("accept");
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if (request.RequestMethod != "GET" && accept_header != "application/json") {
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response.SetStatus(400, "Wrong Accept header");
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response.AddHeader("Content-Type", "text/html");
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String msg = "<h1>Accept header is missing or not set to 'application/json'.</h1>";
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response.WriteBody(msg.CStr(), msg.GetLength());
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} else if (!user) {
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Log(LogWarning, "HttpServerConnection")
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<< "Unauthorized request: " << request.RequestMethod << " " << requestUrl;
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response.SetStatus(401, "Unauthorized");
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response.AddHeader("WWW-Authenticate", "Basic realm=\"Icinga 2\"");
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if (request.Headers->Get("accept") == "application/json") {
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Dictionary::Ptr result = new Dictionary();
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result->Set("error", 401);
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result->Set("status", "Unauthorized. Please check your user credentials.");
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HttpUtility::SendJsonBody(response, result);
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} else {
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response.AddHeader("Content-Type", "text/html");
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String msg = "<h1>Unauthorized. Please check your user credentials.</h1>";
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response.WriteBody(msg.CStr(), msg.GetLength());
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}
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} else {
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try {
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HttpHandler::ProcessRequest(user, request, response);
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} catch (const std::exception& ex) {
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Log(LogCritical, "HttpServerConnection")
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<< "Unhandled exception while processing Http request: " << DiagnosticInformation(ex);
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response.SetStatus(503, "Unhandled exception");
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String errorInfo = DiagnosticInformation(ex);
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if (request.Headers->Get("accept") == "application/json") {
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Dictionary::Ptr result = new Dictionary();
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result->Set("error", 503);
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result->Set("status", errorInfo);
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HttpUtility::SendJsonBody(response, result);
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} else {
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response.AddHeader("Content-Type", "text/plain");
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response.WriteBody(errorInfo.CStr(), errorInfo.GetLength());
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}
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}
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}
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response.Finish();
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m_PendingRequests--;
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}
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void HttpServerConnection::DataAvailableHandler(void)
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{
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bool close = false;
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if (!m_Stream->IsEof()) {
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boost::mutex::scoped_lock lock(m_DataHandlerMutex);
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try {
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while (ProcessMessage())
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; /* empty loop body */
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} catch (const std::exception& ex) {
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Log(LogWarning, "HttpServerConnection")
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<< "Error while reading Http request: " << DiagnosticInformation(ex);
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close = true;
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}
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} else
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close = true;
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if (close)
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Disconnect();
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}
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void HttpServerConnection::CheckLiveness(void)
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{
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if (m_Seen < Utility::GetTime() - 10 && m_PendingRequests == 0) {
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Log(LogInformation, "HttpServerConnection")
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<< "No messages for Http connection have been received in the last 10 seconds.";
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Disconnect();
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}
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}
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void HttpServerConnection::TimeoutTimerHandler(void)
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{
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ApiListener::Ptr listener = ApiListener::GetInstance();
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for (const HttpServerConnection::Ptr& client : listener->GetHttpClients()) {
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client->CheckLiveness();
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}
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}
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