mirror of
https://github.com/reactos/CMake.git
synced 2024-11-28 14:01:21 +00:00
573 lines
15 KiB
C++
573 lines
15 KiB
C++
/* Distributed under the OSI-approved BSD 3-Clause License. See accompanying
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file Copyright.txt or https://cmake.org/licensing for details. */
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#include "cmServer.h"
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#include "cmAlgorithms.h"
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#include "cmConnection.h"
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#include "cmFileMonitor.h"
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#include "cmServerDictionary.h"
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#include "cmServerProtocol.h"
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#include "cmSystemTools.h"
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#include "cm_jsoncpp_reader.h"
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#include "cm_jsoncpp_writer.h"
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#include "cmake.h"
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#include "cmsys/FStream.hxx"
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#include <algorithm>
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#include <cassert>
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#include <cstdint>
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#include <iostream>
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#include <memory>
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#include <utility>
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void on_signal(uv_signal_t* signal, int signum)
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{
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auto conn = reinterpret_cast<cmServerBase*>(signal->data);
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conn->OnSignal(signum);
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}
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static void on_walk_to_shutdown(uv_handle_t* handle, void* arg)
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{
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(void)arg;
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if (!uv_is_closing(handle)) {
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uv_close(handle, &cmEventBasedConnection::on_close);
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}
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}
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class cmServer::DebugInfo
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{
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public:
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DebugInfo()
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: StartTime(uv_hrtime())
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{
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}
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bool PrintStatistics = false;
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std::string OutputFile;
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uint64_t StartTime;
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};
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cmServer::cmServer(cmConnection* conn, bool supportExperimental)
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: cmServerBase(conn)
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, SupportExperimental(supportExperimental)
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{
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// Register supported protocols:
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this->RegisterProtocol(new cmServerProtocol1);
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}
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cmServer::~cmServer()
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{
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for (cmServerProtocol* p : this->SupportedProtocols) {
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delete p;
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}
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}
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void cmServer::ProcessRequest(cmConnection* connection,
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const std::string& input)
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{
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Json::Reader reader;
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Json::Value value;
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if (!reader.parse(input, value)) {
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this->WriteParseError(connection, "Failed to parse JSON input.");
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return;
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}
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std::unique_ptr<DebugInfo> debug;
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Json::Value debugValue = value["debug"];
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if (!debugValue.isNull()) {
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debug = cm::make_unique<DebugInfo>();
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debug->OutputFile = debugValue["dumpToFile"].asString();
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debug->PrintStatistics = debugValue["showStats"].asBool();
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}
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const cmServerRequest request(this, connection, value[kTYPE_KEY].asString(),
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value[kCOOKIE_KEY].asString(), value);
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if (request.Type == "") {
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cmServerResponse response(request);
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response.SetError("No type given in request.");
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this->WriteResponse(connection, response, nullptr);
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return;
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}
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cmSystemTools::SetMessageCallback(reportMessage,
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const_cast<cmServerRequest*>(&request));
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if (this->Protocol) {
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this->Protocol->CMakeInstance()->SetProgressCallback(
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reportProgress, const_cast<cmServerRequest*>(&request));
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this->WriteResponse(connection, this->Protocol->Process(request),
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debug.get());
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} else {
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this->WriteResponse(connection, this->SetProtocolVersion(request),
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debug.get());
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}
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}
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void cmServer::RegisterProtocol(cmServerProtocol* protocol)
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{
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if (protocol->IsExperimental() && !this->SupportExperimental) {
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delete protocol;
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return;
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}
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auto version = protocol->ProtocolVersion();
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assert(version.first >= 0);
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assert(version.second >= 0);
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auto it = std::find_if(this->SupportedProtocols.begin(),
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this->SupportedProtocols.end(),
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[version](cmServerProtocol* p) {
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return p->ProtocolVersion() == version;
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});
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if (it == this->SupportedProtocols.end()) {
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this->SupportedProtocols.push_back(protocol);
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}
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}
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void cmServer::PrintHello(cmConnection* connection) const
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{
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Json::Value hello = Json::objectValue;
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hello[kTYPE_KEY] = "hello";
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Json::Value& protocolVersions = hello[kSUPPORTED_PROTOCOL_VERSIONS] =
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Json::arrayValue;
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for (auto const& proto : this->SupportedProtocols) {
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auto version = proto->ProtocolVersion();
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Json::Value tmp = Json::objectValue;
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tmp[kMAJOR_KEY] = version.first;
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tmp[kMINOR_KEY] = version.second;
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if (proto->IsExperimental()) {
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tmp[kIS_EXPERIMENTAL_KEY] = true;
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}
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protocolVersions.append(tmp);
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}
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this->WriteJsonObject(connection, hello, nullptr);
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}
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void cmServer::reportProgress(const char* msg, float progress, void* data)
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{
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const cmServerRequest* request = static_cast<const cmServerRequest*>(data);
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assert(request);
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if (progress < 0.0f || progress > 1.0f) {
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request->ReportMessage(msg, "");
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} else {
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request->ReportProgress(0, static_cast<int>(progress * 1000), 1000, msg);
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}
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}
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void cmServer::reportMessage(const char* msg, const char* title,
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bool& /* cancel */, void* data)
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{
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const cmServerRequest* request = static_cast<const cmServerRequest*>(data);
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assert(request);
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assert(msg);
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std::string titleString;
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if (title) {
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titleString = title;
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}
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request->ReportMessage(std::string(msg), titleString);
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}
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cmServerResponse cmServer::SetProtocolVersion(const cmServerRequest& request)
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{
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if (request.Type != kHANDSHAKE_TYPE) {
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return request.ReportError("Waiting for type \"" + kHANDSHAKE_TYPE +
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"\".");
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}
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Json::Value requestedProtocolVersion = request.Data[kPROTOCOL_VERSION_KEY];
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if (requestedProtocolVersion.isNull()) {
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return request.ReportError("\"" + kPROTOCOL_VERSION_KEY +
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"\" is required for \"" + kHANDSHAKE_TYPE +
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"\".");
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}
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if (!requestedProtocolVersion.isObject()) {
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return request.ReportError("\"" + kPROTOCOL_VERSION_KEY +
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"\" must be a JSON object.");
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}
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Json::Value majorValue = requestedProtocolVersion[kMAJOR_KEY];
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if (!majorValue.isInt()) {
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return request.ReportError("\"" + kMAJOR_KEY +
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"\" must be set and an integer.");
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}
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Json::Value minorValue = requestedProtocolVersion[kMINOR_KEY];
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if (!minorValue.isNull() && !minorValue.isInt()) {
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return request.ReportError("\"" + kMINOR_KEY +
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"\" must be unset or an integer.");
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}
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const int major = majorValue.asInt();
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const int minor = minorValue.isNull() ? -1 : minorValue.asInt();
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if (major < 0) {
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return request.ReportError("\"" + kMAJOR_KEY + "\" must be >= 0.");
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}
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if (!minorValue.isNull() && minor < 0) {
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return request.ReportError("\"" + kMINOR_KEY +
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"\" must be >= 0 when set.");
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}
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this->Protocol =
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this->FindMatchingProtocol(this->SupportedProtocols, major, minor);
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if (!this->Protocol) {
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return request.ReportError("Protocol version not supported.");
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}
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std::string errorMessage;
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if (!this->Protocol->Activate(this, request, &errorMessage)) {
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this->Protocol = nullptr;
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return request.ReportError("Failed to activate protocol version: " +
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errorMessage);
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}
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return request.Reply(Json::objectValue);
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}
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bool cmServer::Serve(std::string* errorMessage)
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{
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if (this->SupportedProtocols.empty()) {
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*errorMessage =
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"No protocol versions defined. Maybe you need --experimental?";
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return false;
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}
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assert(!this->Protocol);
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return cmServerBase::Serve(errorMessage);
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}
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cmFileMonitor* cmServer::FileMonitor() const
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{
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return fileMonitor.get();
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}
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void cmServer::WriteJsonObject(const Json::Value& jsonValue,
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const DebugInfo* debug) const
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{
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uv_rwlock_rdlock(&ConnectionsMutex);
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for (auto& connection : this->Connections) {
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WriteJsonObject(connection.get(), jsonValue, debug);
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}
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uv_rwlock_rdunlock(&ConnectionsMutex);
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}
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void cmServer::WriteJsonObject(cmConnection* connection,
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const Json::Value& jsonValue,
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const DebugInfo* debug) const
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{
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Json::FastWriter writer;
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auto beforeJson = uv_hrtime();
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std::string result = writer.write(jsonValue);
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if (debug) {
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Json::Value copy = jsonValue;
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if (debug->PrintStatistics) {
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Json::Value stats = Json::objectValue;
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auto endTime = uv_hrtime();
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stats["jsonSerialization"] = double(endTime - beforeJson) / 1000000.0;
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stats["totalTime"] = double(endTime - debug->StartTime) / 1000000.0;
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stats["size"] = static_cast<int>(result.size());
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if (!debug->OutputFile.empty()) {
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stats["dumpFile"] = debug->OutputFile;
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}
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copy["zzzDebug"] = stats;
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result = writer.write(copy); // Update result to include debug info
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}
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if (!debug->OutputFile.empty()) {
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cmsys::ofstream myfile(debug->OutputFile.c_str());
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myfile << result;
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}
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}
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connection->WriteData(result);
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}
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cmServerProtocol* cmServer::FindMatchingProtocol(
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const std::vector<cmServerProtocol*>& protocols, int major, int minor)
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{
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cmServerProtocol* bestMatch = nullptr;
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for (auto protocol : protocols) {
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auto version = protocol->ProtocolVersion();
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if (major != version.first) {
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continue;
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}
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if (minor == version.second) {
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return protocol;
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}
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if (!bestMatch || bestMatch->ProtocolVersion().second < version.second) {
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bestMatch = protocol;
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}
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}
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return minor < 0 ? bestMatch : nullptr;
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}
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void cmServer::WriteProgress(const cmServerRequest& request, int min,
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int current, int max,
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const std::string& message) const
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{
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assert(min <= current && current <= max);
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assert(message.length() != 0);
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Json::Value obj = Json::objectValue;
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obj[kTYPE_KEY] = kPROGRESS_TYPE;
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obj[kREPLY_TO_KEY] = request.Type;
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obj[kCOOKIE_KEY] = request.Cookie;
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obj[kPROGRESS_MESSAGE_KEY] = message;
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obj[kPROGRESS_MINIMUM_KEY] = min;
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obj[kPROGRESS_MAXIMUM_KEY] = max;
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obj[kPROGRESS_CURRENT_KEY] = current;
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this->WriteJsonObject(request.Connection, obj, nullptr);
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}
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void cmServer::WriteMessage(const cmServerRequest& request,
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const std::string& message,
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const std::string& title) const
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{
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if (message.empty()) {
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return;
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}
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Json::Value obj = Json::objectValue;
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obj[kTYPE_KEY] = kMESSAGE_TYPE;
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obj[kREPLY_TO_KEY] = request.Type;
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obj[kCOOKIE_KEY] = request.Cookie;
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obj[kMESSAGE_KEY] = message;
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if (!title.empty()) {
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obj[kTITLE_KEY] = title;
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}
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WriteJsonObject(request.Connection, obj, nullptr);
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}
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void cmServer::WriteParseError(cmConnection* connection,
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const std::string& message) const
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{
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Json::Value obj = Json::objectValue;
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obj[kTYPE_KEY] = kERROR_TYPE;
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obj[kERROR_MESSAGE_KEY] = message;
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obj[kREPLY_TO_KEY] = "";
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obj[kCOOKIE_KEY] = "";
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this->WriteJsonObject(connection, obj, nullptr);
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}
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void cmServer::WriteSignal(const std::string& name,
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const Json::Value& data) const
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{
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assert(data.isObject());
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Json::Value obj = data;
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obj[kTYPE_KEY] = kSIGNAL_TYPE;
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obj[kREPLY_TO_KEY] = "";
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obj[kCOOKIE_KEY] = "";
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obj[kNAME_KEY] = name;
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WriteJsonObject(obj, nullptr);
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}
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void cmServer::WriteResponse(cmConnection* connection,
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const cmServerResponse& response,
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const DebugInfo* debug) const
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{
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assert(response.IsComplete());
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Json::Value obj = response.Data();
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obj[kCOOKIE_KEY] = response.Cookie;
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obj[kTYPE_KEY] = response.IsError() ? kERROR_TYPE : kREPLY_TYPE;
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obj[kREPLY_TO_KEY] = response.Type;
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if (response.IsError()) {
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obj[kERROR_MESSAGE_KEY] = response.ErrorMessage();
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}
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this->WriteJsonObject(connection, obj, debug);
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}
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void cmServer::OnConnected(cmConnection* connection)
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{
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PrintHello(connection);
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}
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void cmServer::OnServeStart()
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{
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cmServerBase::OnServeStart();
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fileMonitor = std::make_shared<cmFileMonitor>(GetLoop());
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}
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void cmServer::StartShutDown()
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{
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if (fileMonitor) {
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fileMonitor->StopMonitoring();
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fileMonitor.reset();
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}
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cmServerBase::StartShutDown();
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}
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static void __start_thread(void* arg)
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{
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auto server = reinterpret_cast<cmServerBase*>(arg);
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std::string error;
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bool success = server->Serve(&error);
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if (!success || error.empty() == false) {
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std::cerr << "Error during serve: " << error << std::endl;
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}
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}
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static void __shutdownThread(uv_async_t* arg)
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{
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auto server = reinterpret_cast<cmServerBase*>(arg->data);
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on_walk_to_shutdown(reinterpret_cast<uv_handle_t*>(arg), nullptr);
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server->StartShutDown();
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}
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bool cmServerBase::StartServeThread()
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{
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ServeThreadRunning = true;
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uv_async_init(&Loop, &this->ShutdownSignal, __shutdownThread);
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this->ShutdownSignal.data = this;
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uv_thread_create(&ServeThread, __start_thread, this);
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return true;
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}
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bool cmServerBase::Serve(std::string* errorMessage)
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{
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#ifndef NDEBUG
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uv_thread_t blank_thread_t = {};
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assert(uv_thread_equal(&blank_thread_t, &ServeThreadId));
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ServeThreadId = uv_thread_self();
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#endif
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errorMessage->clear();
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uv_signal_init(&Loop, &this->SIGINTHandler);
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uv_signal_init(&Loop, &this->SIGHUPHandler);
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this->SIGINTHandler.data = this;
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this->SIGHUPHandler.data = this;
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uv_signal_start(&this->SIGINTHandler, &on_signal, SIGINT);
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uv_signal_start(&this->SIGHUPHandler, &on_signal, SIGHUP);
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OnServeStart();
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{
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uv_rwlock_rdlock(&ConnectionsMutex);
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for (auto& connection : Connections) {
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if (!connection->OnServeStart(errorMessage)) {
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uv_rwlock_rdunlock(&ConnectionsMutex);
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return false;
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}
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}
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uv_rwlock_rdunlock(&ConnectionsMutex);
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}
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if (uv_run(&Loop, UV_RUN_DEFAULT) != 0) {
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// It is important we don't ever let the event loop exit with open handles
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// at best this is a memory leak, but it can also introduce race conditions
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// which can hang the program.
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assert(false && "Event loop stopped in unclean state.");
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*errorMessage = "Internal Error: Event loop stopped in unclean state.";
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return false;
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}
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ServeThreadRunning = false;
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return true;
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}
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void cmServerBase::OnConnected(cmConnection*)
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{
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}
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void cmServerBase::OnServeStart()
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{
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}
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void cmServerBase::StartShutDown()
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{
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if (!uv_is_closing(
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reinterpret_cast<const uv_handle_t*>(&this->SIGINTHandler))) {
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uv_signal_stop(&this->SIGINTHandler);
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}
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if (!uv_is_closing(
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reinterpret_cast<const uv_handle_t*>(&this->SIGHUPHandler))) {
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uv_signal_stop(&this->SIGHUPHandler);
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}
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{
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uv_rwlock_wrlock(&ConnectionsMutex);
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for (auto& connection : Connections) {
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connection->OnConnectionShuttingDown();
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}
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Connections.clear();
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uv_rwlock_wrunlock(&ConnectionsMutex);
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}
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uv_walk(&Loop, on_walk_to_shutdown, nullptr);
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}
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bool cmServerBase::OnSignal(int signum)
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{
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(void)signum;
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StartShutDown();
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return true;
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}
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cmServerBase::cmServerBase(cmConnection* connection)
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{
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auto err = uv_loop_init(&Loop);
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(void)err;
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assert(err == 0);
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err = uv_rwlock_init(&ConnectionsMutex);
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assert(err == 0);
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AddNewConnection(connection);
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}
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cmServerBase::~cmServerBase()
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{
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if (ServeThreadRunning) {
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uv_async_send(&this->ShutdownSignal);
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uv_thread_join(&ServeThread);
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}
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uv_loop_close(&Loop);
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uv_rwlock_destroy(&ConnectionsMutex);
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}
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void cmServerBase::AddNewConnection(cmConnection* ownedConnection)
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{
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uv_rwlock_wrlock(&ConnectionsMutex);
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Connections.emplace_back(ownedConnection);
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uv_rwlock_wrunlock(&ConnectionsMutex);
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ownedConnection->SetServer(this);
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}
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uv_loop_t* cmServerBase::GetLoop()
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|
{
|
|
return &Loop;
|
|
}
|
|
|
|
void cmServerBase::OnDisconnect(cmConnection* pConnection)
|
|
{
|
|
auto pred = [pConnection](const std::unique_ptr<cmConnection>& m) {
|
|
return m.get() == pConnection;
|
|
};
|
|
uv_rwlock_wrlock(&ConnectionsMutex);
|
|
Connections.erase(
|
|
std::remove_if(Connections.begin(), Connections.end(), pred),
|
|
Connections.end());
|
|
uv_rwlock_wrunlock(&ConnectionsMutex);
|
|
if (Connections.empty()) {
|
|
StartShutDown();
|
|
}
|
|
}
|