mirror of
https://github.com/debauchee/barrier.git
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800 lines
18 KiB
C++
800 lines
18 KiB
C++
/*
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* synergy -- mouse and keyboard sharing utility
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* Copyright (C) 2002 Chris Schoeneman
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*
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* This package 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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* found in the file COPYING that should have accompanied this file.
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*
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* This package 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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#include "CHTTPServer.h"
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#include "CConfig.h"
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#include "CHTTPProtocol.h"
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#include "CServer.h"
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#include "XHTTP.h"
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#include "IDataSocket.h"
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#include "XThread.h"
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#include "CLog.h"
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#include "stdset.h"
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#include "stdsstream.h"
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//
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// CHTTPServer
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//
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// maximum size of an HTTP request. this should be large enough to
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// handle any reasonable request but small enough to prevent a
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// malicious client from causing us to use too much memory.
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const UInt32 CHTTPServer::s_maxRequestSize = 32768;
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CHTTPServer::CHTTPServer(
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CServer* server) :
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m_server(server)
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{
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// do nothing
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}
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CHTTPServer::~CHTTPServer()
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{
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// do nothing
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}
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void
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CHTTPServer::processRequest(IDataSocket* socket)
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{
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assert(socket != NULL);
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CHTTPRequest* request = NULL;
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try {
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// parse request
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request = CHTTPProtocol::readRequest(
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socket->getInputStream(), s_maxRequestSize);
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if (request == NULL) {
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throw XHTTP(400);
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}
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// if absolute uri then strip off scheme and host
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if (request->m_uri[0] != '/') {
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CString::size_type n = request->m_uri.find('/');
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if (n == CString::npos) {
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throw XHTTP(404);
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}
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request->m_uri = request->m_uri.substr(n);
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}
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// prepare reply
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CHTTPReply reply;
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reply.m_majorVersion = request->m_majorVersion;
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reply.m_minorVersion = request->m_minorVersion;
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reply.m_status = 200;
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reply.m_reason = "OK";
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reply.m_method = request->m_method;
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// process
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doProcessRequest(*request, reply);
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// send reply
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CHTTPProtocol::reply(socket->getOutputStream(), reply);
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LOG((CLOG_INFO "HTTP reply %d for %s %s", reply.m_status, request->m_method.c_str(), request->m_uri.c_str()));
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// clean up
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delete request;
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}
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catch (XHTTP& e) {
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LOG((CLOG_WARN "returning HTTP error %d %s for %s", e.getStatus(), e.getReason().c_str(), (request != NULL) ? request->m_uri.c_str() : "<unknown>"));
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// clean up
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delete request;
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// return error
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CHTTPReply reply;
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reply.m_majorVersion = 1;
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reply.m_minorVersion = 0;
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reply.m_status = e.getStatus();
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reply.m_reason = e.getReason();
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reply.m_method = "GET";
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// FIXME -- use a nicer error page
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reply.m_headers.push_back(std::make_pair(CString("Content-Type"),
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CString("text/plain")));
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reply.m_body = e.getReason();
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e.addHeaders(reply);
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CHTTPProtocol::reply(socket->getOutputStream(), reply);
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}
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catch (...) {
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// ignore other exceptions
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RETHROW_XTHREAD
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}
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}
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void
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CHTTPServer::doProcessRequest(CHTTPRequest& request, CHTTPReply& reply)
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{
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// switch based on uri
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if (request.m_uri == "/editmap") {
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if (request.m_method == "GET" || request.m_method == "HEAD") {
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doProcessGetEditMap(request, reply);
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reply.m_headers.push_back(std::make_pair(
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CString("Content-Type"),
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CString("text/html")));
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}
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else if (request.m_method == "POST") {
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doProcessPostEditMap(request, reply);
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reply.m_headers.push_back(std::make_pair(
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CString("Content-Type"),
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CString("text/html")));
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}
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else {
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throw XHTTPAllow("GET, HEAD, POST");
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}
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}
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else {
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// unknown page
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throw XHTTP(404);
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}
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}
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void
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CHTTPServer::doProcessGetEditMap(CHTTPRequest& /*request*/, CHTTPReply& reply)
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{
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static const char* s_editMapProlog1 =
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"<html>\r\n"
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"<head>\r\n"
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" <title>Synergy -- Edit Screens</title>\r\n"
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"</head>\r\n"
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"<body>\r\n"
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" <form method=\"POST\" action=\"editmap\" "
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"enctype=\"multipart/form-data\">\r\n"
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" <input type=hidden name=\"size\" value=\"";
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static const char* s_editMapProlog2 =
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"\">\r\n";
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static const char* s_editMapEpilog =
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" <input type=submit name=\"submit\">\r\n"
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" <input type=reset>\r\n"
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" <br>\r\n"
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" </form>\r\n"
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"</body>\r\n"
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"</html>\r\n";
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static const char* s_editMapTableProlog =
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"<table border=\"1\" cellspacing=\"0\" cellpadding=\"0\"><tr><td>"
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" <table border=\"0\" cellspacing=\"2\" cellpadding=\"6\">\r\n";
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static const char* s_editMapTableEpilog =
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" </table>"
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"</td></tr></table>\r\n";
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static const char* s_editMapRowProlog =
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"<tr align=\"center\" valign=\"top\">\r\n";
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static const char* s_editMapRowEpilog =
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"</tr>\r\n";
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static const char* s_editMapScreenDummy =
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"<td>";
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static const char* s_editMapScreenPrimary =
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"<td bgcolor=\"#2222288\"><input type=\"text\" readonly value=\"";
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static const char* s_editMapScreenLive =
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"<td bgcolor=\"#cccccc\"><input type=\"text\" value=\"";
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static const char* s_editMapScreenDead =
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"<td><input type=\"text\" value=\"";
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static const char* s_editMapScreenLiveDead1 =
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"\" size=\"16\" maxlength=\"64\" name=\"";
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static const char* s_editMapScreenLiveDead2 =
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"\">";
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static const char* s_editMapScreenEnd =
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"</td>\r\n";
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std::ostringstream s;
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// convert screen map into a temporary screen map
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CScreenArray screens;
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{
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CConfig config;
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m_server->getConfig(&config);
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screens.convertFrom(config);
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// FIXME -- note to user if config couldn't be exactly represented
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}
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// insert blank columns and rows around array (to allow the user
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// to insert new screens)
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screens.insertColumn(0);
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screens.insertColumn(screens.getWidth());
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screens.insertRow(0);
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screens.insertRow(screens.getHeight());
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// get array size
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const SInt32 w = screens.getWidth();
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const SInt32 h = screens.getHeight();
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// construct reply
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reply.m_body += s_editMapProlog1;
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s << w << "x" << h;
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reply.m_body += s.str();
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reply.m_body += s_editMapProlog2;
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// add screen map for editing
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const CString primaryName = m_server->getPrimaryScreenName();
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reply.m_body += s_editMapTableProlog;
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for (SInt32 y = 0; y < h; ++y) {
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reply.m_body += s_editMapRowProlog;
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for (SInt32 x = 0; x < w; ++x) {
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s.str("");
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if (!screens.isAllowed(x, y) && screens.get(x, y) != primaryName) {
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s << s_editMapScreenDummy;
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}
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else {
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if (!screens.isSet(x, y)) {
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s << s_editMapScreenDead;
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}
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else if (screens.get(x, y) == primaryName) {
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s << s_editMapScreenPrimary;
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}
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else {
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s << s_editMapScreenLive;
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}
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s << screens.get(x, y) <<
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s_editMapScreenLiveDead1 <<
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"n" << x << "x" << y <<
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s_editMapScreenLiveDead2;
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}
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s << s_editMapScreenEnd;
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reply.m_body += s.str();
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}
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reply.m_body += s_editMapRowEpilog;
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}
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reply.m_body += s_editMapTableEpilog;
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reply.m_body += s_editMapEpilog;
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}
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void
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CHTTPServer::doProcessPostEditMap(CHTTPRequest& request, CHTTPReply& reply)
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{
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typedef std::vector<CString> ScreenArray;
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typedef std::set<CString> ScreenSet;
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// parse the result
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CHTTPProtocol::CFormParts parts;
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if (!CHTTPProtocol::parseFormData(request, parts)) {
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LOG((CLOG_WARN "editmap: cannot parse form data"));
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throw XHTTP(400);
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}
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try {
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std::ostringstream s;
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// convert post data into a temporary screen map. also check
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// that no screen name is invalid or used more than once.
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SInt32 w, h;
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CHTTPProtocol::CFormParts::iterator index = parts.find("size");
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if (index == parts.end() ||
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!parseXY(index->second, w, h) ||
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w <= 0 || h <= 0) {
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LOG((CLOG_WARN "editmap: cannot parse size or size is invalid"));
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throw XHTTP(400);
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}
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ScreenSet screenNames;
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CScreenArray screens;
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screens.resize(w, h);
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for (SInt32 y = 0; y < h; ++y) {
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for (SInt32 x = 0; x < w; ++x) {
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// find part
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s.str("");
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s << "n" << x << "x" << y;
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index = parts.find(s.str());
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if (index == parts.end()) {
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// FIXME -- screen is missing. error?
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continue;
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}
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// skip blank names
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const CString& name = index->second;
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if (name.empty()) {
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continue;
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}
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// check name. name must be legal and must not have
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// already been seen.
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if (screenNames.count(name)) {
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// FIXME -- better error message
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LOG((CLOG_WARN "editmap: duplicate name %s", name.c_str()));
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throw XHTTP(400);
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}
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// FIXME -- check that name is legal
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// save name. if we've already seen the name then
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// report an error.
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screens.set(x, y, name);
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screenNames.insert(name);
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}
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}
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// if new map is invalid then return error. map is invalid if:
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// there are no screens, or
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// the screens are not 4-connected.
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if (screenNames.empty()) {
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// no screens
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// FIXME -- need better no screens
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LOG((CLOG_WARN "editmap: no screens"));
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throw XHTTP(400);
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}
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if (!screens.isValid()) {
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// FIXME -- need better unconnected screens error
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LOG((CLOG_WARN "editmap: unconnected screens"));
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throw XHTTP(400);
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}
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// convert temporary screen map into a regular map
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CConfig config;
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m_server->getConfig(&config);
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screens.convertTo(config);
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// set new screen map on server
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m_server->setConfig(config);
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// now reply with current map
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doProcessGetEditMap(request, reply);
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}
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catch (XHTTP&) {
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// FIXME -- construct a more meaningful error?
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throw;
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}
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}
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bool
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CHTTPServer::parseXY(const CString& xy, SInt32& x, SInt32& y)
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{
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std::istringstream s(xy);
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char delimiter;
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s >> x;
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s.get(delimiter);
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s >> y;
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return (!!s && delimiter == 'x');
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}
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//
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// CHTTPServer::CScreenArray
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//
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CHTTPServer::CScreenArray::CScreenArray() :
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m_w(0),
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m_h(0)
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{
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// do nothing
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}
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CHTTPServer::CScreenArray::~CScreenArray()
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{
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// do nothing
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}
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void
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CHTTPServer::CScreenArray::resize(SInt32 w, SInt32 h)
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{
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m_screens.clear();
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m_screens.resize(w * h);
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m_w = w;
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m_h = h;
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}
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void
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CHTTPServer::CScreenArray::insertRow(SInt32 i)
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{
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assert(i >= 0 && i <= m_h);
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CNames newScreens;
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newScreens.resize(m_w * (m_h + 1));
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for (SInt32 y = 0; y < i; ++y) {
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for (SInt32 x = 0; x < m_w; ++x) {
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newScreens[x + y * m_w] = m_screens[x + y * m_w];
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}
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}
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for (SInt32 y = i; y < m_h; ++y) {
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for (SInt32 x = 0; x < m_w; ++x) {
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newScreens[x + (y + 1) * m_w] = m_screens[x + y * m_w];
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}
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}
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m_screens.swap(newScreens);
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++m_h;
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}
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void
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CHTTPServer::CScreenArray::insertColumn(SInt32 i)
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{
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assert(i >= 0 && i <= m_w);
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CNames newScreens;
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newScreens.resize((m_w + 1) * m_h);
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for (SInt32 y = 0; y < m_h; ++y) {
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for (SInt32 x = 0; x < i; ++x) {
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newScreens[x + y * (m_w + 1)] = m_screens[x + y * m_w];
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}
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for (SInt32 x = i; x < m_w; ++x) {
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newScreens[(x + 1) + y * (m_w + 1)] = m_screens[x + y * m_w];
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}
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}
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m_screens.swap(newScreens);
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++m_w;
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}
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void
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CHTTPServer::CScreenArray::eraseRow(SInt32 i)
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{
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assert(i >= 0 && i < m_h);
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CNames newScreens;
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newScreens.resize(m_w * (m_h - 1));
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for (SInt32 y = 0; y < i; ++y) {
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for (SInt32 x = 0; x < m_w; ++x) {
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newScreens[x + y * m_w] = m_screens[x + y * m_w];
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}
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}
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for (SInt32 y = i + 1; y < m_h; ++y) {
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for (SInt32 x = 0; x < m_w; ++x) {
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newScreens[x + (y - 1) * m_w] = m_screens[x + y * m_w];
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}
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}
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m_screens.swap(newScreens);
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--m_h;
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}
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void
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CHTTPServer::CScreenArray::eraseColumn(SInt32 i)
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{
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assert(i >= 0 && i < m_w);
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CNames newScreens;
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newScreens.resize((m_w - 1) * m_h);
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for (SInt32 y = 0; y < m_h; ++y) {
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for (SInt32 x = 0; x < m_w; ++x) {
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newScreens[x + y * (m_w - 1)] = m_screens[x + y * m_w];
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}
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for (SInt32 x = i + 1; x < m_w; ++x) {
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newScreens[(x - 1) + y * (m_w - 1)] = m_screens[x + y * m_w];
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}
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}
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m_screens.swap(newScreens);
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--m_w;
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}
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void
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CHTTPServer::CScreenArray::rotateRows(SInt32 i)
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{
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// nothing to do if no rows
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if (m_h == 0) {
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return;
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}
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// convert to canonical form
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if (i < 0) {
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i = m_h - ((-i) % m_h);
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}
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else {
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i %= m_h;
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}
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if (i == 0 || i == m_h) {
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return;
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}
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while (i > 0) {
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// rotate one row
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for (SInt32 x = 0; x < m_w; ++x) {
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CString tmp = m_screens[x];
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for (SInt32 y = 1; y < m_h; ++y) {
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m_screens[x + (y - 1) * m_w] = m_screens[x + y * m_w];
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}
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m_screens[x + (m_h - 1) * m_w] = tmp;
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}
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}
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}
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void
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CHTTPServer::CScreenArray::rotateColumns(SInt32 i)
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{
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// nothing to do if no columns
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if (m_h == 0) {
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return;
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}
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// convert to canonical form
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if (i < 0) {
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i = m_w - ((-i) % m_w);
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}
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else {
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i %= m_w;
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}
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if (i == 0 || i == m_w) {
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return;
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}
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while (i > 0) {
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// rotate one column
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for (SInt32 y = 0; y < m_h; ++y) {
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CString tmp = m_screens[0 + y * m_w];
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for (SInt32 x = 1; x < m_w; ++x) {
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m_screens[x - 1 + y * m_w] = m_screens[x + y * m_w];
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}
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m_screens[m_w - 1 + y * m_w] = tmp;
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}
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}
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}
|
|
|
|
void
|
|
CHTTPServer::CScreenArray::remove(SInt32 x, SInt32 y)
|
|
{
|
|
set(x, y, CString());
|
|
}
|
|
|
|
void
|
|
CHTTPServer::CScreenArray::set(SInt32 x, SInt32 y, const CString& name)
|
|
{
|
|
assert(x >= 0 && x < m_w);
|
|
assert(y >= 0 && y < m_h);
|
|
|
|
m_screens[x + y * m_w] = name;
|
|
}
|
|
|
|
bool
|
|
CHTTPServer::CScreenArray::isAllowed(SInt32 x, SInt32 y) const
|
|
{
|
|
assert(x >= 0 && x < m_w);
|
|
assert(y >= 0 && y < m_h);
|
|
|
|
if (x > 0 && !m_screens[(x - 1) + y * m_w].empty()) {
|
|
return true;
|
|
}
|
|
if (x < m_w - 1 && !m_screens[(x + 1) + y * m_w].empty()) {
|
|
return true;
|
|
}
|
|
if (y > 0 && !m_screens[x + (y - 1) * m_w].empty()) {
|
|
return true;
|
|
}
|
|
if (y < m_h - 1 && !m_screens[x + (y + 1) * m_w].empty()) {
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool
|
|
CHTTPServer::CScreenArray::isSet(SInt32 x, SInt32 y) const
|
|
{
|
|
assert(x >= 0 && x < m_w);
|
|
assert(y >= 0 && y < m_h);
|
|
|
|
return !m_screens[x + y * m_w].empty();
|
|
}
|
|
|
|
CString
|
|
CHTTPServer::CScreenArray::get(SInt32 x, SInt32 y) const
|
|
{
|
|
assert(x >= 0 && x < m_w);
|
|
assert(y >= 0 && y < m_h);
|
|
|
|
return m_screens[x + y * m_w];
|
|
}
|
|
|
|
bool
|
|
CHTTPServer::CScreenArray::find(const CString& name,
|
|
SInt32& xOut, SInt32& yOut) const
|
|
{
|
|
for (SInt32 y = 0; y < m_h; ++y) {
|
|
for (SInt32 x = 0; x < m_w; ++x) {
|
|
if (m_screens[x + y * m_w] == name) {
|
|
xOut = x;
|
|
yOut = y;
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool
|
|
CHTTPServer::CScreenArray::isValid() const
|
|
{
|
|
SInt32 count = 0, isolated = 0;
|
|
for (SInt32 y = 0; y < m_h; ++y) {
|
|
for (SInt32 x = 0; x < m_w; ++x) {
|
|
if (isSet(x, y)) {
|
|
++count;
|
|
if (!isAllowed(x, y)) {
|
|
++isolated;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return (count <= 1 || isolated == 0);
|
|
}
|
|
|
|
bool
|
|
CHTTPServer::CScreenArray::convertFrom(const CConfig& config)
|
|
{
|
|
typedef std::set<CString> ScreenSet;
|
|
|
|
// insert the first screen
|
|
CConfig::const_iterator index = config.begin();
|
|
if (index == config.end()) {
|
|
// no screens
|
|
resize(0, 0);
|
|
return true;
|
|
}
|
|
CString name = *index;
|
|
resize(1, 1);
|
|
set(0, 0, name);
|
|
|
|
// flood fill state
|
|
CNames screenStack;
|
|
ScreenSet doneSet;
|
|
|
|
// put all but the first screen on the stack
|
|
// note -- if all screens are 4-connected then we can skip this
|
|
while (++index != config.end()) {
|
|
screenStack.push_back(*index);
|
|
}
|
|
|
|
// put the first screen on the stack last so we process it first
|
|
screenStack.push_back(name);
|
|
|
|
// perform a flood fill using the stack as the seeds
|
|
while (!screenStack.empty()) {
|
|
// get next screen from stack
|
|
CString name = screenStack.back();
|
|
screenStack.pop_back();
|
|
|
|
// skip screen if we've seen it before
|
|
if (doneSet.count(name) > 0) {
|
|
continue;
|
|
}
|
|
|
|
// add this screen to doneSet so we don't process it again
|
|
doneSet.insert(name);
|
|
|
|
// find the screen. if it's not found then not all of the
|
|
// screens are 4-connected. discard disconnected screens.
|
|
SInt32 x, y;
|
|
if (!find(name, x, y)) {
|
|
continue;
|
|
}
|
|
|
|
// insert the screen's neighbors
|
|
// FIXME -- handle edge wrapping
|
|
CString neighbor;
|
|
neighbor = config.getNeighbor(name, kLeft);
|
|
if (!neighbor.empty() && doneSet.count(neighbor) == 0) {
|
|
// insert left neighbor, adding a column if necessary
|
|
if (x == 0 || get(x - 1, y) != neighbor) {
|
|
++x;
|
|
insertColumn(x - 1);
|
|
set(x - 1, y, neighbor);
|
|
}
|
|
screenStack.push_back(neighbor);
|
|
}
|
|
neighbor = config.getNeighbor(name, kRight);
|
|
if (!neighbor.empty() && doneSet.count(neighbor) == 0) {
|
|
// insert right neighbor, adding a column if necessary
|
|
if (x == m_w - 1 || get(x + 1, y) != neighbor) {
|
|
insertColumn(x + 1);
|
|
set(x + 1, y, neighbor);
|
|
}
|
|
screenStack.push_back(neighbor);
|
|
}
|
|
neighbor = config.getNeighbor(name, kTop);
|
|
if (!neighbor.empty() && doneSet.count(neighbor) == 0) {
|
|
// insert top neighbor, adding a row if necessary
|
|
if (y == 0 || get(x, y - 1) != neighbor) {
|
|
++y;
|
|
insertRow(y - 1);
|
|
set(x, y - 1, neighbor);
|
|
}
|
|
screenStack.push_back(neighbor);
|
|
}
|
|
neighbor = config.getNeighbor(name, kBottom);
|
|
if (!neighbor.empty() && doneSet.count(neighbor) == 0) {
|
|
// insert bottom neighbor, adding a row if necessary
|
|
if (y == m_h - 1 || get(x, y + 1) != neighbor) {
|
|
insertRow(y + 1);
|
|
set(x, y + 1, neighbor);
|
|
}
|
|
screenStack.push_back(neighbor);
|
|
}
|
|
}
|
|
|
|
// check symmetry
|
|
// FIXME -- handle edge wrapping
|
|
for (index = config.begin(); index != config.end(); ++index) {
|
|
const CString& name = *index;
|
|
SInt32 x, y;
|
|
if (!find(name, x, y)) {
|
|
return false;
|
|
}
|
|
|
|
CString neighbor;
|
|
neighbor = config.getNeighbor(name, kLeft);
|
|
if ((x == 0 && !neighbor.empty()) ||
|
|
(x > 0 && get(x - 1, y) != neighbor)) {
|
|
return false;
|
|
}
|
|
|
|
neighbor = config.getNeighbor(name, kRight);
|
|
if ((x == m_w - 1 && !neighbor.empty()) ||
|
|
(x < m_w - 1 && get(x + 1, y) != neighbor)) {
|
|
return false;
|
|
}
|
|
|
|
neighbor = config.getNeighbor(name, kTop);
|
|
if ((y == 0 && !neighbor.empty()) ||
|
|
(y > 0 && get(x, y - 1) != neighbor)) {
|
|
return false;
|
|
}
|
|
|
|
neighbor = config.getNeighbor(name, kBottom);
|
|
if ((y == m_h - 1 && !neighbor.empty()) ||
|
|
(y < m_h - 1 && get(x, y + 1) != neighbor)) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
void
|
|
CHTTPServer::CScreenArray::convertTo(CConfig& config) const
|
|
{
|
|
config.removeAllScreens();
|
|
|
|
// add screens and find smallest box containing all screens
|
|
SInt32 x0 = m_w, x1 = 0, y0 = m_h, y1 = 0;
|
|
for (SInt32 y = 0; y < m_h; ++y) {
|
|
for (SInt32 x = 0; x < m_w; ++x) {
|
|
if (isSet(x, y)) {
|
|
config.addScreen(get(x, y));
|
|
if (x < x0) {
|
|
x0 = x;
|
|
}
|
|
if (x > x1) {
|
|
x1 = x;
|
|
}
|
|
if (y < y0) {
|
|
y0 = y;
|
|
}
|
|
if (y > y1) {
|
|
y1 = y;
|
|
}
|
|
}
|
|
|
|
}
|
|
}
|
|
|
|
// make connections between screens
|
|
// FIXME -- add support for wrapping
|
|
// FIXME -- mark topmost and leftmost screens
|
|
for (SInt32 y = 0; y < m_h; ++y) {
|
|
for (SInt32 x = 0; x < m_w; ++x) {
|
|
if (!isSet(x, y)) {
|
|
continue;
|
|
}
|
|
if (x > x0 && isSet(x - 1, y)) {
|
|
config.connect(get(x, y), kLeft, get(x - 1, y));
|
|
}
|
|
if (x < x1 && isSet(x + 1, y)) {
|
|
config.connect(get(x, y), kRight, get(x + 1, y));
|
|
}
|
|
if (y > y0 && isSet(x, y - 1)) {
|
|
config.connect(get(x, y), kTop, get(x, y - 1));
|
|
}
|
|
if (y < y1 && isSet(x, y + 1)) {
|
|
config.connect(get(x, y), kBottom, get(x, y + 1));
|
|
}
|
|
}
|
|
}
|
|
}
|