CMake/Source/cmServer.cxx

380 lines
10 KiB
C++

/* Distributed under the OSI-approved BSD 3-Clause License. See accompanying
file Copyright.txt or https://cmake.org/licensing for details. */
#include "cmServer.h"
#include "cmServerConnection.h"
#include "cmServerDictionary.h"
#include "cmServerProtocol.h"
#include "cmSystemTools.h"
#include "cmVersionMacros.h"
#include "cmake.h"
#if defined(CMAKE_BUILD_WITH_CMAKE)
#include "cm_jsoncpp_reader.h"
#include "cm_jsoncpp_value.h"
#endif
#include <fstream>
#include <iostream>
#include <memory>
class cmServer::DebugInfo
{
public:
DebugInfo()
: StartTime(uv_hrtime())
{
}
bool PrintStatistics = false;
std::string OutputFile;
uint64_t StartTime;
};
cmServer::cmServer(cmServerConnection* conn, bool supportExperimental)
: Connection(conn)
, SupportExperimental(supportExperimental)
{
this->Connection->SetServer(this);
// Register supported protocols:
this->RegisterProtocol(new cmServerProtocol1_0);
}
cmServer::~cmServer()
{
if (!this->Protocol) { // Server was never fully started!
return;
}
for (cmServerProtocol* p : this->SupportedProtocols) {
delete p;
}
delete this->Connection;
}
void cmServer::PopOne()
{
if (this->Queue.empty()) {
return;
}
Json::Reader reader;
Json::Value value;
const std::string input = this->Queue.front();
this->Queue.erase(this->Queue.begin());
if (!reader.parse(input, value)) {
this->WriteParseError("Failed to parse JSON input.");
return;
}
std::unique_ptr<DebugInfo> debug;
Json::Value debugValue = value["debug"];
if (!debugValue.isNull()) {
debug = std::make_unique<DebugInfo>();
debug->OutputFile = debugValue["dumpToFile"].asString();
debug->PrintStatistics = debugValue["showStats"].asBool();
}
const cmServerRequest request(this, value[kTYPE_KEY].asString(),
value[kCOOKIE_KEY].asString(), value);
if (request.Type == "") {
cmServerResponse response(request);
response.SetError("No type given in request.");
this->WriteResponse(response, nullptr);
return;
}
cmSystemTools::SetMessageCallback(reportMessage,
const_cast<cmServerRequest*>(&request));
if (this->Protocol) {
this->Protocol->CMakeInstance()->SetProgressCallback(
reportProgress, const_cast<cmServerRequest*>(&request));
this->WriteResponse(this->Protocol->Process(request), debug.get());
} else {
this->WriteResponse(this->SetProtocolVersion(request), debug.get());
}
}
void cmServer::RegisterProtocol(cmServerProtocol* protocol)
{
if (protocol->IsExperimental() && !this->SupportExperimental) {
return;
}
auto version = protocol->ProtocolVersion();
assert(version.first >= 0);
assert(version.second >= 0);
auto it = std::find_if(this->SupportedProtocols.begin(),
this->SupportedProtocols.end(),
[version](cmServerProtocol* p) {
return p->ProtocolVersion() == version;
});
if (it == this->SupportedProtocols.end()) {
this->SupportedProtocols.push_back(protocol);
}
}
void cmServer::PrintHello() const
{
Json::Value hello = Json::objectValue;
hello[kTYPE_KEY] = "hello";
Json::Value& protocolVersions = hello[kSUPPORTED_PROTOCOL_VERSIONS] =
Json::arrayValue;
for (auto const& proto : this->SupportedProtocols) {
auto version = proto->ProtocolVersion();
Json::Value tmp = Json::objectValue;
tmp[kMAJOR_KEY] = version.first;
tmp[kMINOR_KEY] = version.second;
if (proto->IsExperimental()) {
tmp[kIS_EXPERIMENTAL_KEY] = true;
}
protocolVersions.append(tmp);
}
this->WriteJsonObject(hello, nullptr);
}
void cmServer::QueueRequest(const std::string& request)
{
this->Queue.push_back(request);
this->PopOne();
}
void cmServer::reportProgress(const char* msg, float progress, void* data)
{
const cmServerRequest* request = static_cast<const cmServerRequest*>(data);
assert(request);
if (progress < 0.0 || progress > 1.0) {
request->ReportMessage(msg, "");
} else {
request->ReportProgress(0, static_cast<int>(progress * 1000), 1000, msg);
}
}
void cmServer::reportMessage(const char* msg, const char* title,
bool& /* cancel */, void* data)
{
const cmServerRequest* request = static_cast<const cmServerRequest*>(data);
assert(request);
assert(msg);
std::string titleString;
if (title) {
titleString = title;
}
request->ReportMessage(std::string(msg), titleString);
}
cmServerResponse cmServer::SetProtocolVersion(const cmServerRequest& request)
{
if (request.Type != kHANDSHAKE_TYPE) {
return request.ReportError("Waiting for type \"" + kHANDSHAKE_TYPE +
"\".");
}
Json::Value requestedProtocolVersion = request.Data[kPROTOCOL_VERSION_KEY];
if (requestedProtocolVersion.isNull()) {
return request.ReportError("\"" + kPROTOCOL_VERSION_KEY +
"\" is required for \"" + kHANDSHAKE_TYPE +
"\".");
}
if (!requestedProtocolVersion.isObject()) {
return request.ReportError("\"" + kPROTOCOL_VERSION_KEY +
"\" must be a JSON object.");
}
Json::Value majorValue = requestedProtocolVersion[kMAJOR_KEY];
if (!majorValue.isInt()) {
return request.ReportError("\"" + kMAJOR_KEY +
"\" must be set and an integer.");
}
Json::Value minorValue = requestedProtocolVersion[kMINOR_KEY];
if (!minorValue.isNull() && !minorValue.isInt()) {
return request.ReportError("\"" + kMINOR_KEY +
"\" must be unset or an integer.");
}
const int major = majorValue.asInt();
const int minor = minorValue.isNull() ? -1 : minorValue.asInt();
if (major < 0) {
return request.ReportError("\"" + kMAJOR_KEY + "\" must be >= 0.");
}
if (!minorValue.isNull() && minor < 0) {
return request.ReportError("\"" + kMINOR_KEY +
"\" must be >= 0 when set.");
}
this->Protocol =
this->FindMatchingProtocol(this->SupportedProtocols, major, minor);
if (!this->Protocol) {
return request.ReportError("Protocol version not supported.");
}
std::string errorMessage;
if (!this->Protocol->Activate(this, request, &errorMessage)) {
this->Protocol = CM_NULLPTR;
return request.ReportError("Failed to activate protocol version: " +
errorMessage);
}
return request.Reply(Json::objectValue);
}
bool cmServer::Serve(std::string* errorMessage)
{
if (this->SupportedProtocols.empty()) {
*errorMessage =
"No protocol versions defined. Maybe you need --experimental?";
return false;
}
assert(!this->Protocol);
return Connection->ProcessEvents(errorMessage);
}
cmFileMonitor* cmServer::FileMonitor() const
{
return Connection->FileMonitor();
}
void cmServer::WriteJsonObject(const Json::Value& jsonValue,
const DebugInfo* debug) const
{
Json::FastWriter writer;
auto beforeJson = uv_hrtime();
std::string result = writer.write(jsonValue);
if (debug) {
Json::Value copy = jsonValue;
if (debug->PrintStatistics) {
Json::Value stats = Json::objectValue;
auto endTime = uv_hrtime();
stats["jsonSerialization"] = double(endTime - beforeJson) / 1000000.0;
stats["totalTime"] = double(endTime - debug->StartTime) / 1000000.0;
stats["size"] = static_cast<int>(result.size());
if (!debug->OutputFile.empty()) {
stats["dumpFile"] = debug->OutputFile;
}
copy["zzzDebug"] = stats;
result = writer.write(copy); // Update result to include debug info
}
if (!debug->OutputFile.empty()) {
std::ofstream myfile;
myfile.open(debug->OutputFile);
myfile << result;
myfile.close();
}
}
Connection->WriteData(std::string("\n") + kSTART_MAGIC + std::string("\n") +
result + kEND_MAGIC + std::string("\n"));
}
cmServerProtocol* cmServer::FindMatchingProtocol(
const std::vector<cmServerProtocol*>& protocols, int major, int minor)
{
cmServerProtocol* bestMatch = nullptr;
for (auto protocol : protocols) {
auto version = protocol->ProtocolVersion();
if (major != version.first) {
continue;
}
if (minor == version.second) {
return protocol;
}
if (!bestMatch || bestMatch->ProtocolVersion().second < version.second) {
bestMatch = protocol;
}
}
return minor < 0 ? bestMatch : nullptr;
}
void cmServer::WriteProgress(const cmServerRequest& request, int min,
int current, int max,
const std::string& message) const
{
assert(min <= current && current <= max);
assert(message.length() != 0);
Json::Value obj = Json::objectValue;
obj[kTYPE_KEY] = kPROGRESS_TYPE;
obj[kREPLY_TO_KEY] = request.Type;
obj[kCOOKIE_KEY] = request.Cookie;
obj[kPROGRESS_MESSAGE_KEY] = message;
obj[kPROGRESS_MINIMUM_KEY] = min;
obj[kPROGRESS_MAXIMUM_KEY] = max;
obj[kPROGRESS_CURRENT_KEY] = current;
this->WriteJsonObject(obj, nullptr);
}
void cmServer::WriteMessage(const cmServerRequest& request,
const std::string& message,
const std::string& title) const
{
if (message.empty()) {
return;
}
Json::Value obj = Json::objectValue;
obj[kTYPE_KEY] = kMESSAGE_TYPE;
obj[kREPLY_TO_KEY] = request.Type;
obj[kCOOKIE_KEY] = request.Cookie;
obj[kMESSAGE_KEY] = message;
if (!title.empty()) {
obj[kTITLE_KEY] = title;
}
WriteJsonObject(obj, nullptr);
}
void cmServer::WriteParseError(const std::string& message) const
{
Json::Value obj = Json::objectValue;
obj[kTYPE_KEY] = kERROR_TYPE;
obj[kERROR_MESSAGE_KEY] = message;
obj[kREPLY_TO_KEY] = "";
obj[kCOOKIE_KEY] = "";
this->WriteJsonObject(obj, nullptr);
}
void cmServer::WriteSignal(const std::string& name,
const Json::Value& data) const
{
assert(data.isObject());
Json::Value obj = data;
obj[kTYPE_KEY] = kSIGNAL_TYPE;
obj[kREPLY_TO_KEY] = "";
obj[kCOOKIE_KEY] = "";
obj[kNAME_KEY] = name;
WriteJsonObject(obj, nullptr);
}
void cmServer::WriteResponse(const cmServerResponse& response,
const DebugInfo* debug) const
{
assert(response.IsComplete());
Json::Value obj = response.Data();
obj[kCOOKIE_KEY] = response.Cookie;
obj[kTYPE_KEY] = response.IsError() ? kERROR_TYPE : kREPLY_TYPE;
obj[kREPLY_TO_KEY] = response.Type;
if (response.IsError()) {
obj[kERROR_MESSAGE_KEY] = response.ErrorMessage();
}
this->WriteJsonObject(obj, debug);
}