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synced 2026-09-03 19:25:18 +02:00
http: Move web server to core and use flags.
This way we can independently control the debugger and disc sharing, since debugger could have security impact.
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// Copyright (c) 2014- PPSSPP Project.
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, version 2.0 or later versions.
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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 2.0 for more details.
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// A copy of the GPL 2.0 should have been included with the program.
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// If not, see http://www.gnu.org/licenses/
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// Official git repository and contact information can be found at
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// https://github.com/hrydgard/ppsspp and http://www.ppsspp.org/.
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#include <algorithm>
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#include <mutex>
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#include <thread>
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#include <unordered_map>
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#include "base/stringutil.h"
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#include "base/timeutil.h"
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#include "file/fd_util.h"
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#include "net/http_client.h"
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#include "net/http_server.h"
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#include "net/sinks.h"
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#include "thread/threadutil.h"
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#include "Common/FileUtil.h"
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#include "Common/Log.h"
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#include "Core/Config.h"
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#include "Core/WebServer.h"
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enum class ServerStatus {
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STOPPED,
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STARTING,
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RUNNING,
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STOPPING,
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RESTARTING,
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};
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static const char *REPORT_HOSTNAME = "report.ppsspp.org";
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static const int REPORT_PORT = 80;
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static std::thread serverThread;
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static ServerStatus serverStatus;
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static std::mutex serverStatusLock;
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static int serverFlags;
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static void UpdateStatus(ServerStatus s) {
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std::lock_guard<std::mutex> guard(serverStatusLock);
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serverStatus = s;
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}
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static bool UpdateStatus(ServerStatus s, ServerStatus old) {
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std::lock_guard<std::mutex> guard(serverStatusLock);
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if (serverStatus == old) {
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serverStatus = s;
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return true;
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}
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return false;
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}
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static ServerStatus RetrieveStatus() {
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std::lock_guard<std::mutex> guard(serverStatusLock);
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return serverStatus;
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}
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// This reports the local IP address to report.ppsspp.org, which can then
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// relay that address to a mobile device searching for the server.
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static void RegisterServer(int port) {
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http::Client http;
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Buffer theVoid;
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char resource4[1024] = {};
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if (http.Resolve(REPORT_HOSTNAME, REPORT_PORT, net::DNSType::IPV4)) {
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if (http.Connect()) {
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std::string ip = fd_util::GetLocalIP(http.sock());
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snprintf(resource4, sizeof(resource4) - 1, "/match/update?local=%s&port=%d", ip.c_str(), port);
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http.GET(resource4, &theVoid);
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theVoid.Skip(theVoid.size());
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http.Disconnect();
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}
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}
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if (http.Resolve(REPORT_HOSTNAME, REPORT_PORT, net::DNSType::IPV6)) {
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// We register both IPv4 and IPv6 in case the other client is using a different one.
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if (resource4[0] != 0 && http.Connect()) {
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http.GET(resource4, &theVoid);
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theVoid.Skip(theVoid.size());
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http.Disconnect();
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}
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// Currently, we're not using keepalive, so gotta reconnect...
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if (http.Connect()) {
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char resource6[1024] = {};
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std::string ip = fd_util::GetLocalIP(http.sock());
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snprintf(resource6, sizeof(resource6) - 1, "/match/update?local=%s&port=%d", ip.c_str(), port);
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http.GET(resource6, &theVoid);
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theVoid.Skip(theVoid.size());
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http.Disconnect();
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}
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}
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}
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static void RegisterDiscHandlers(http::Server *http, std::unordered_map<std::string, std::string> *paths) {
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for (std::string filename : g_Config.recentIsos) {
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#ifdef _WIN32
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static const std::string sep = "\\/";
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#else
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static const std::string sep = "/";
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#endif
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size_t basepos = filename.find_last_of(sep);
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std::string basename = "/" + (basepos == filename.npos ? filename : filename.substr(basepos + 1));
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// Let's not serve directories, since they won't work. Only single files.
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// Maybe can do PBPs and other files later. Would be neat to stream virtual disc filesystems.
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if (endsWithNoCase(basename, ".cso") || endsWithNoCase(basename, ".iso")) {
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(*paths)[ReplaceAll(basename, " ", "%20")] = filename;
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}
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}
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auto handler = [paths](const http::Request &request) {
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std::string filename = (*paths)[request.resource()];
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s64 sz = File::GetFileSize(filename);
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std::string range;
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if (request.Method() == http::RequestHeader::HEAD) {
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request.WriteHttpResponseHeader(200, sz, "application/octet-stream", "Accept-Ranges: bytes\r\n");
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} else if (request.GetHeader("range", &range)) {
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s64 begin = 0, last = 0;
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if (sscanf(range.c_str(), "bytes=%lld-%lld", &begin, &last) != 2) {
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request.WriteHttpResponseHeader(400, -1, "text/plain");
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request.Out()->Push("Could not understand range request.");
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return;
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}
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if (begin < 0 || begin > last || last >= sz) {
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request.WriteHttpResponseHeader(416, -1, "text/plain");
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request.Out()->Push("Range goes outside of file.");
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return;
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}
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FILE *fp = File::OpenCFile(filename, "rb");
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if (!fp || fseek(fp, begin, SEEK_SET) != 0) {
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request.WriteHttpResponseHeader(500, -1, "text/plain");
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request.Out()->Push("File access failed.");
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if (fp) {
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fclose(fp);
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}
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return;
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}
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s64 len = last - begin + 1;
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char contentRange[1024];
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sprintf(contentRange, "Content-Range: bytes %lld-%lld/%lld\r\n", begin, last, sz);
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request.WriteHttpResponseHeader(206, len, "application/octet-stream", contentRange);
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const size_t CHUNK_SIZE = 16 * 1024;
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char *buf = new char[CHUNK_SIZE];
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for (s64 pos = 0; pos < len; pos += CHUNK_SIZE) {
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s64 chunklen = std::min(len - pos, (s64)CHUNK_SIZE);
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fread(buf, chunklen, 1, fp);
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request.Out()->Push(buf, chunklen);
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}
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fclose(fp);
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delete [] buf;
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request.Out()->Flush();
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} else {
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request.WriteHttpResponseHeader(418, -1, "text/plain");
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request.Out()->Push("This server only supports range requests.");
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}
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};
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for (auto pair : *paths) {
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http->RegisterHandler(pair.first.c_str(), handler);
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}
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}
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static void ExecuteWebServer() {
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setCurrentThreadName("HTTPServer");
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auto http = new http::Server(new threading::NewThreadExecutor());
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std::unordered_map<std::string, std::string> discPaths;
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if (serverFlags & (int)WebServerFlags::DISCS) {
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RegisterDiscHandlers(http, &discPaths);
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}
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if (!http->Listen(g_Config.iRemoteISOPort)) {
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if (!http->Listen(0)) {
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ERROR_LOG(FILESYS, "Unable to listen on any port");
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UpdateStatus(ServerStatus::STOPPED);
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return;
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}
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}
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UpdateStatus(ServerStatus::RUNNING);
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g_Config.iRemoteISOPort = http->Port();
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RegisterServer(http->Port());
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double lastRegister = real_time_now();
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while (RetrieveStatus() == ServerStatus::RUNNING) {
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http->RunSlice(1.0);
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double now = real_time_now();
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if (now > lastRegister + 540.0) {
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RegisterServer(http->Port());
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lastRegister = now;
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}
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}
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http->Stop();
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// Move to STARTING to lock flags/STOPPING.
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if (UpdateStatus(ServerStatus::STARTING, ServerStatus::RESTARTING)) {
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ExecuteWebServer();
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} else {
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UpdateStatus(ServerStatus::STOPPED);
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}
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}
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bool StartWebServer(WebServerFlags flags) {
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std::lock_guard<std::mutex> guard(serverStatusLock);
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switch (serverStatus) {
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case ServerStatus::RUNNING:
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case ServerStatus::RESTARTING:
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if ((serverFlags & (int)flags) == (int)flags) {
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// Already running those flags.
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return false;
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}
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serverStatus = ServerStatus::RESTARTING;
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serverFlags |= (int)flags;
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return true;
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case ServerStatus::STOPPED:
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serverStatus = ServerStatus::STARTING;
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serverFlags = (int)flags;
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serverThread = std::thread(&ExecuteWebServer);
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serverThread.detach();
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return true;
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default:
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return false;
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}
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}
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bool StopWebServer(WebServerFlags flags) {
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std::lock_guard<std::mutex> guard(serverStatusLock);
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if (serverStatus != ServerStatus::RUNNING && serverStatus != ServerStatus::RESTARTING) {
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return false;
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}
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serverFlags &= ~(int)flags;
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if (serverFlags == 0) {
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serverStatus = ServerStatus::STOPPING;
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} else {
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serverStatus = ServerStatus::RESTARTING;
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}
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return true;
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}
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bool WebServerStopping(WebServerFlags flags) {
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std::lock_guard<std::mutex> guard(serverStatusLock);
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if (serverStatus == ServerStatus::RESTARTING) {
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return (serverFlags & (int)flags) == 0;
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}
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return serverStatus == ServerStatus::STOPPING;
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}
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bool WebServerStopped(WebServerFlags flags) {
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std::lock_guard<std::mutex> guard(serverStatusLock);
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if (serverStatus == ServerStatus::RUNNING) {
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return (serverFlags & (int)flags) == 0;
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}
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return serverStatus == ServerStatus::STOPPED;
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}
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