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| #include "async_request.hpp"
#include <iostream>
#include <sstream>
#include <filesystem>
#include <thread>
#include <queue>
#include <mutex>
#include <condition_variable>
#include <memory>
#include <atomic>
#include <chrono>
#include <future>
#include <curl/curl.h>
static lua_State* g_main_lua_state = nullptr;
static lua_State* g_routine_lua_state = nullptr;
static std::thread g_routine_thread;
static std::queue<RequestContext> g_queue;
static std::mutex g_mutex;
static std::condition_variable g_cv;
static std::atomic_bool g_quit_flag = false;
size_t func_response_chunk(void* buffer, size_t size, size_t nmemb, void* data)
{
size_t bytesize = size * nmemb;
PRequestContext context = reinterpret_cast<PRequestContext>(data);
if (!buffer || !context) {
return 0;
}
if (!g_routine_lua_state) {
return bytesize;
}
lua_getglobal(g_routine_lua_state, "async_request_response_callback");
if (lua_isfunction(g_routine_lua_state, -1))
{
lua_pushlstring(g_routine_lua_state, (const char*)(buffer), bytesize);
lua_pushstring(g_routine_lua_state, context->context.c_str());
int ret = lua_pcall(g_routine_lua_state, 2, 0, 0);
if (ret != LUA_OK) {
std::cerr << "error calling callback : "
<< lua_tostring(g_routine_lua_state, -1)
<< std::endl;
}
}
std::cout << "bytesize : " << bytesize << std::endl;
std::cout << context->url << std::endl;
std::cout << (char*)buffer << std::endl;
return bytesize;
}
void func_request(RequestContext& context)
{
CURL* curl;
CURLcode res;
curl = curl_easy_init();
if (!curl) {
return;
}
curl_easy_setopt(curl, CURLOPT_URL, context.url.c_str());
curl_easy_setopt(curl, CURLOPT_NOSIGNAL, 1);
curl_easy_setopt(curl, CURLOPT_BUFFERSIZE, 4096);
curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, func_response_chunk);
curl_easy_setopt(curl, CURLOPT_WRITEDATA, &context);
res = curl_easy_perform(curl);
if (res != CURLE_OK) {
std::cerr << "curl_easy_perform() failed : "
<< curl_easy_strerror(res)
<< std::endl;
}
curl_easy_cleanup(curl);
}
static void routine(std::promise<void*>* p)
{
RequestContext next_context;
g_routine_lua_state = lua_newthread(g_main_lua_state);
lua_setglobal(g_main_lua_state, "async_request_thread");
p->set_value(g_routine_lua_state);
for (;;)
{
{
std::unique_lock<std::mutex> lock(g_mutex);
g_cv.wait_for(lock, std::chrono::milliseconds(100), [] {
return !g_queue.empty() || g_quit_flag;
});
if (g_quit_flag) {
break;
}
if (g_queue.empty()) {
continue;
}
next_context = g_queue.front();
g_queue.pop();
}
func_request(next_context);
}
while (lua_status(g_routine_lua_state) != LUA_OK && lua_status(g_routine_lua_state) != LUA_YIELD)
{
}
lua_close(g_routine_lua_state);
}
static void push_mission(RequestContext context)
{
{
std::lock_guard<std::mutex> lock(g_mutex);
g_queue.push(context);
}
g_cv.notify_one();
}
static int __ar_register_response_callback(lua_State* L)
{
luaL_checktype(L, 1, LUA_TFUNCTION);
lua_setglobal(L, "async_request_response_callback");
lua_pushboolean(L, true);
return 1;
}
static int __ar_request(lua_State* L)
{
const char* url = luaL_checkstring(L, 1);
const char* context = luaL_checkstring(L, 2);
push_mission(RequestContext{ url, context });
lua_pushboolean(L, true);
return 1;
}
const struct luaL_Reg AsyncRequestModuleMethods[] = {
{"register_response_callback", __ar_register_response_callback},
{"request", __ar_request},
{NULL, NULL},
};
int LUA_API luaL_async_request_destroy(lua_State* L)
{
UNREFERENCED_PARAMETER(L);
g_quit_flag = true;
g_cv.notify_all();
g_routine_thread.join();
g_routine_lua_state = nullptr;
g_main_lua_state = nullptr;
curl_global_cleanup();
return 0;
}
int LUA_API luaopen_async_request(lua_State* L)
{
luaL_newlib(L, AsyncRequestModuleMethods);
char full_path[MAX_PATH] = { 0 };
char abs_full_path[MAX_PATH] = { 0 };
if (GetModuleFileNameA(GetModuleHandleA("async_request.dll"), full_path, MAX_PATH)) {
if (GetFullPathNameA(full_path, MAX_PATH, abs_full_path, nullptr)) {
std::string dll_search_path = std::filesystem::path::path(abs_full_path).parent_path().string();
SetDllDirectoryA(dll_search_path.c_str());
}
}
if (g_routine_lua_state) {
return 1;
}
curl_global_init(CURL_GLOBAL_ALL);
std::promise<void*> p;
std::future<void*> f = p.get_future();
g_main_lua_state = L;
g_routine_thread = std::thread(routine, &p);
f.wait();
return 1;
}
|
