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/* Distributed under the OSI-approved BSD 3-Clause License. See accompanying
file Copyright.txt or https://cmake.org/licensing for details. */
#include "cmServerConnection.h"
#include "cmConfigure.h"
#include "cmServer.h"
#include "cmServerDictionary.h"
#ifdef _WIN32
#include "io.h"
#else
#include <unistd.h>
#endif
#include <cassert>
cmStdIoConnection::cmStdIoConnection(
cmConnectionBufferStrategy* bufferStrategy)
: cmEventBasedConnection(bufferStrategy)
{
}
void cmStdIoConnection::SetupStream(uv_stream_t*& stream, int file_id)
{
assert(stream == nullptr);
switch (uv_guess_handle(file_id)) {
case UV_TTY: {
auto tty = new uv_tty_t();
uv_tty_init(this->Server->GetLoop(), tty, file_id, file_id == 0);
uv_tty_set_mode(tty, UV_TTY_MODE_NORMAL);
stream = reinterpret_cast<uv_stream_t*>(tty);
break;
}
case UV_FILE:
if (file_id == 0) {
return;
}
// Intentional fallthrough; stdin can _not_ be treated as a named
// pipe, however stdout can be.
CM_FALLTHROUGH;
case UV_NAMED_PIPE: {
auto pipe = new uv_pipe_t();
uv_pipe_init(this->Server->GetLoop(), pipe, 0);
uv_pipe_open(pipe, file_id);
stream = reinterpret_cast<uv_stream_t*>(pipe);
break;
}
default:
assert(false && "Unable to determine stream type");
return;
}
stream->data = static_cast<cmEventBasedConnection*>(this);
}
void cmStdIoConnection::SetServer(cmServerBase* s)
{
cmConnection::SetServer(s);
if (!s) {
return;
}
SetupStream(this->ReadStream, 0);
SetupStream(this->WriteStream, 1);
}
void shutdown_connection(uv_prepare_t* prepare)
{
cmStdIoConnection* connection =
reinterpret_cast<cmStdIoConnection*>(prepare->data);
if (!uv_is_closing(reinterpret_cast<uv_handle_t*>(prepare))) {
uv_close(reinterpret_cast<uv_handle_t*>(prepare),
&cmEventBasedConnection::on_close_delete<uv_prepare_t>);
}
connection->OnDisconnect(0);
}
bool cmStdIoConnection::OnServeStart(std::string* pString)
{
Server->OnConnected(this);
if (this->ReadStream) {
uv_read_start(this->ReadStream, on_alloc_buffer, on_read);
} else if (uv_guess_handle(0) == UV_FILE) {
char buffer[1024];
while (auto len = read(0, buffer, sizeof(buffer))) {
ReadData(std::string(buffer, buffer + len));
}
// We can't start the disconnect from here, add a prepare hook to do that
// for us
auto prepare = new uv_prepare_t();
prepare->data = this;
uv_prepare_init(Server->GetLoop(), prepare);
uv_prepare_start(prepare, shutdown_connection);
}
return cmConnection::OnServeStart(pString);
}
void cmStdIoConnection::ShutdownStream(uv_stream_t*& stream)
{
if (!stream) {
return;
}
switch (stream->type) {
case UV_TTY: {
assert(!uv_is_closing(reinterpret_cast<uv_handle_t*>(stream)));
if (!uv_is_closing(reinterpret_cast<uv_handle_t*>(stream))) {
uv_close(reinterpret_cast<uv_handle_t*>(stream),
&on_close_delete<uv_tty_t>);
}
break;
}
case UV_FILE:
case UV_NAMED_PIPE: {
assert(!uv_is_closing(reinterpret_cast<uv_handle_t*>(stream)));
if (!uv_is_closing(reinterpret_cast<uv_handle_t*>(stream))) {
uv_close(reinterpret_cast<uv_handle_t*>(stream),
&on_close_delete<uv_pipe_t>);
}
break;
}
default:
assert(false && "Unable to determine stream type");
}
stream = nullptr;
}
bool cmStdIoConnection::OnConnectionShuttingDown()
{
if (ReadStream) {
uv_read_stop(ReadStream);
}
ShutdownStream(ReadStream);
ShutdownStream(WriteStream);
cmEventBasedConnection::OnConnectionShuttingDown();
return true;
}
cmServerPipeConnection::cmServerPipeConnection(const std::string& name)
: cmPipeConnection(name, new cmServerBufferStrategy)
{
}
cmServerStdIoConnection::cmServerStdIoConnection()
: cmStdIoConnection(new cmServerBufferStrategy)
{
}
cmConnectionBufferStrategy::~cmConnectionBufferStrategy()
{
}
void cmConnectionBufferStrategy::clear()
{
}
std::string cmServerBufferStrategy::BufferOutMessage(
const std::string& rawBuffer) const
{
return std::string("\n") + kSTART_MAGIC + std::string("\n") + rawBuffer +
kEND_MAGIC + std::string("\n");
}
std::string cmServerBufferStrategy::BufferMessage(std::string& RawReadBuffer)
{
for (;;) {
auto needle = RawReadBuffer.find('\n');
if (needle == std::string::npos) {
return "";
}
std::string line = RawReadBuffer.substr(0, needle);
const auto ls = line.size();
if (ls > 1 && line.at(ls - 1) == '\r') {
line.erase(ls - 1, 1);
}
RawReadBuffer.erase(RawReadBuffer.begin(),
RawReadBuffer.begin() + static_cast<long>(needle) + 1);
if (line == kSTART_MAGIC) {
RequestBuffer.clear();
continue;
}
if (line == kEND_MAGIC) {
std::string rtn;
rtn.swap(this->RequestBuffer);
return rtn;
}
this->RequestBuffer += line;
this->RequestBuffer += "\n";
}
}
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