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#include "http_webhook_server.hpp"
#include <fcntl.h>
#include <unistd.h>
#include <cstring>
#include <algorithm>
HttpWebhookServer::HttpWebhookServer(uint16_t port, Handler handler)
: port(port), request_handler(handler) {
setupSocket();
setupEpoll();
}
HttpWebhookServer::~HttpWebhookServer() {
stop();
if (server_fd != -1) ::close(server_fd);
if (epoll_fd != -1) ::close(epoll_fd);
}
void HttpWebhookServer::setupSocket() {
server_fd = ::socket(AF_INET, SOCK_STREAM | SOCK_NONBLOCK, 0);
if (server_fd == -1) throw std::system_error(errno, std::generic_category());
int opt = 1;
setsockopt(server_fd, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt));
sockaddr_in addr{};
addr.sin_family = AF_INET;
addr.sin_addr.s_addr = INADDR_ANY;
addr.sin_port = htons(port);
if (::bind(server_fd, reinterpret_cast<sockaddr*>(&addr), sizeof(addr)) == -1)
throw std::system_error(errno, std::generic_category());
if (::listen(server_fd, 128) == -1)
throw std::system_error(errno, std::generic_category());
}
void HttpWebhookServer::setupEpoll() {
epoll_fd = ::epoll_create1(0);
if (epoll_fd == -1)
throw std::system_error(errno, std::generic_category());
epoll_event event{};
event.events = EPOLLIN | EPOLLET;
event.data.fd = server_fd;
if (::epoll_ctl(epoll_fd, EPOLL_CTL_ADD, server_fd, &event) == -1)
throw std::system_error(errno, std::generic_category());
}
void HttpWebhookServer::start() {
running = true;
epoll_event events[64];
while (running) {
int nfds = ::epoll_wait(epoll_fd, events, 64, -1);
if (nfds == -1 && errno != EINTR)
throw std::system_error(errno, std::generic_category());
for (int i = 0; i < nfds; ++i) {
if (events[i].data.fd == server_fd) {
while (true) {
sockaddr_in client_addr{};
socklen_t client_len = sizeof(client_addr);
int client_fd = ::accept4(server_fd, (sockaddr*)&client_addr, &client_len, SOCK_NONBLOCK);
if (client_fd == -1) break;
epoll_event event{};
event.events = EPOLLIN | EPOLLET | EPOLLRDHUP;
event.data.fd = client_fd;
::epoll_ctl(epoll_fd, EPOLL_CTL_ADD, client_fd, &event);
clients[client_fd] = ClientContext{};
}
} else {
handleClient(events[i].data.fd);
}
}
}
}
void HttpWebhookServer::stop() {
running = false;
}
void HttpWebhookServer::closeClient(int fd) {
::epoll_ctl(epoll_fd, EPOLL_CTL_DEL, fd, nullptr);
::close(fd);
clients.erase(fd);
}
void HttpWebhookServer::handleClient(int fd) {
char buffer[4096];
ssize_t count = ::recv(fd, buffer, sizeof(buffer), MSG_DONTWAIT);
if (count > 0) {
auto& ctx = clients[fd];
ctx.input_buffer.append(buffer, count);
if (ctx.input_buffer.find("\r\n\r\n") != std::string::npos) {
HttpRequest req;
parseHttpRequest(ctx, req);
HttpResponse res = request_handler(req);
buildHttpResponse(res, ctx.output_buffer);
epoll_event event{};
event.events = EPOLLOUT | EPOLLET | EPOLLRDHUP;
event.data.fd = fd;
::epoll_ctl(epoll_fd, EPOLL_CTL_MOD, fd, &event);
}
}
else if (count == 0 || (count == -1 && errno != EAGAIN)) {
closeClient(fd);
return;
}
if (!clients.count(fd)) return; // Client déjà fermé plus haut
auto& ctx = clients[fd];
if (!ctx.output_buffer.empty()) {
ssize_t sent = ::send(fd,
ctx.output_buffer.data() + ctx.bytes_written,
ctx.output_buffer.size() - ctx.bytes_written,
MSG_DONTWAIT);
if (sent > 0) ctx.bytes_written += sent;
if (ctx.bytes_written == ctx.output_buffer.size()) {
closeClient(fd);
}
}
}
void HttpWebhookServer::parseHttpRequest(ClientContext& ctx, HttpRequest& req) {
std::istringstream stream(ctx.input_buffer);
std::string line;
std::getline(stream, line);
std::istringstream req_line(line);
req_line >> req.method >> req.path;
while (std::getline(stream, line) && line != "\r") {
size_t colon = line.find(':');
if (colon != std::string::npos) {
std::string key = line.substr(0, colon);
std::string value = line.substr(colon + 1);
key.erase(std::remove_if(key.begin(), key.end(), ::isspace), key.end());
value.erase(0, value.find_first_not_of(" \t\r\n"));
value.erase(value.find_last_not_of(" \t\r\n") + 1);
req.headers[key] = value;
}
}
size_t header_end = ctx.input_buffer.find("\r\n\r\n");
if (header_end != std::string::npos) {
req.body = ctx.input_buffer.substr(header_end + 4);
if (req.headers.count("Content-Length")) {
size_t content_length = std::stoul(req.headers["Content-Length"]);
req.body = req.body.substr(0, content_length);
}
}
}
void HttpWebhookServer::buildHttpResponse(const HttpResponse& res, std::string& output) {
output = "HTTP/1.1 " + std::to_string(res.status_code) + " OK\r\n";
for (const auto& [key, value] : res.headers) {
output += key + ": " + value + "\r\n";
}
if (!res.headers.count("Content-Length")) {
output += "Content-Length: " + std::to_string(res.body.size()) + "\r\n";
}
output += "\r\n" + res.body;
}
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