588 lines
13 KiB
C++
588 lines
13 KiB
C++
//
|
|
// httplib.h
|
|
//
|
|
// Copyright (c) 2012 Yuji Hirose. All rights reserved.
|
|
// The Boost Software License 1.0
|
|
//
|
|
|
|
#ifndef HTTPSVRKIT_H
|
|
#define HTTPSVRKIT_H
|
|
|
|
#ifdef _WIN32
|
|
#define _CRT_SECURE_NO_WARNINGS
|
|
#define _CRT_NONSTDC_NO_DEPRECATE
|
|
|
|
#ifndef SO_SYNCHRONOUS_NONALERT
|
|
#define SO_SYNCHRONOUS_NONALERT 0x20;
|
|
#endif
|
|
#ifndef SO_OPENTYPE
|
|
#define SO_OPENTYPE 0x7008
|
|
#endif
|
|
|
|
#include <fcntl.h>
|
|
#include <io.h>
|
|
#include <winsock2.h>
|
|
|
|
typedef SOCKET socket_t;
|
|
#define snprintf sprintf_s
|
|
#else
|
|
#include <pthread.h>
|
|
#include <unistd.h>
|
|
#include <netdb.h>
|
|
#include <netinet/in.h>
|
|
#include <arpa/inet.h>
|
|
#include <sys/socket.h>
|
|
|
|
typedef int socket_t;
|
|
#endif
|
|
|
|
#include <functional>
|
|
#include <map>
|
|
#include <regex>
|
|
#include <string>
|
|
#include <assert.h>
|
|
|
|
namespace httplib
|
|
{
|
|
|
|
typedef std::map<std::string, std::string> Map;
|
|
typedef std::vector<std::string> Array;
|
|
typedef std::multimap<std::string, std::string> MultiMap;
|
|
|
|
struct Request {
|
|
std::string method;
|
|
std::string url;
|
|
MultiMap headers;
|
|
std::string body;
|
|
Map query;
|
|
Array params;
|
|
};
|
|
|
|
struct Response {
|
|
int status;
|
|
MultiMap headers;
|
|
std::string body;
|
|
|
|
void set_redirect(const char* url);
|
|
void set_content(const std::string& s, const char* content_type = "text/plain");
|
|
};
|
|
|
|
struct Connection {
|
|
Request request;
|
|
Response response;
|
|
};
|
|
|
|
class Server {
|
|
public:
|
|
typedef std::function<void (Connection& c)> Handler;
|
|
|
|
Server(const char* host, int port);
|
|
~Server();
|
|
|
|
void get(const char* pattern, Handler handler);
|
|
void post(const char* pattern, Handler handler);
|
|
void error(Handler handler);
|
|
|
|
void set_logger(std::function<void (const Connection&)> logger);
|
|
|
|
bool run();
|
|
void stop();
|
|
|
|
private:
|
|
void process_request(FILE* fp_read, FILE* fp_write);
|
|
|
|
bool read_request_line(FILE* fp, Request& req);
|
|
void write_response(FILE* fp, const Response& res);
|
|
|
|
const std::string host_;
|
|
const int port_;
|
|
socket_t sock_;
|
|
|
|
std::vector<std::pair<std::regex, Handler>> get_handlers_;
|
|
std::vector<std::pair<std::string, Handler>> post_handlers_;
|
|
Handler error_handler_;
|
|
std::function<void (const Connection&)> logger_;
|
|
};
|
|
|
|
class Client {
|
|
public:
|
|
Client(const char* host, int port);
|
|
~Client();
|
|
|
|
int get(const char* url, Response& res);
|
|
|
|
private:
|
|
bool read_response_line(FILE* fp, Response& res);
|
|
|
|
const std::string host_;
|
|
const int port_;
|
|
};
|
|
|
|
// Implementation
|
|
|
|
template <class Fn>
|
|
void split(const char* b, const char* e, char d, Fn fn)
|
|
{
|
|
int i = 0;
|
|
int beg = 0;
|
|
|
|
while (e ? (b + i != e) : (b[i] != '\0')) {
|
|
if (b[i] == d) {
|
|
fn(&b[beg], &b[i]);
|
|
beg = i + 1;
|
|
}
|
|
i++;
|
|
}
|
|
|
|
if (i) {
|
|
fn(&b[beg], &b[i]);
|
|
}
|
|
}
|
|
|
|
inline void get_flie_pointers(int fd, FILE*& fp_read, FILE*& fp_write)
|
|
{
|
|
#ifdef _WIN32
|
|
int osfhandle = _open_osfhandle(fd, _O_RDONLY);
|
|
fp_read = fdopen(osfhandle, "rb");
|
|
fp_write = fdopen(osfhandle, "wb");
|
|
#else
|
|
fp_read = fdopen(fd, "rb");
|
|
fp_write = fdopen(fd, "wb");
|
|
#endif
|
|
}
|
|
|
|
template <typename Fn>
|
|
inline socket_t create_socket(const char* host, int port, Fn fn)
|
|
{
|
|
#ifdef _WIN32
|
|
int opt = SO_SYNCHRONOUS_NONALERT;
|
|
setsockopt(INVALID_SOCKET, SOL_SOCKET, SO_OPENTYPE, (char*)&opt, sizeof(opt));
|
|
#endif
|
|
|
|
// Create a server socket
|
|
socket_t sock = socket(AF_INET, SOCK_STREAM, 0);
|
|
if (sock == -1) {
|
|
return -1;
|
|
}
|
|
|
|
// Make 'reuse address' option available
|
|
int yes = 1;
|
|
setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (char*)&yes, sizeof(yes));
|
|
|
|
// Get a host entry info
|
|
struct hostent* hp;
|
|
if (!(hp = gethostbyname(host))) {
|
|
return -1;
|
|
}
|
|
|
|
// Bind the socket to the given address
|
|
struct sockaddr_in addr;
|
|
memset(&addr, 0, sizeof(addr));
|
|
memcpy(&addr.sin_addr, hp->h_addr, hp->h_length);
|
|
addr.sin_family = AF_INET;
|
|
addr.sin_port = htons(port);
|
|
|
|
return fn(sock, addr);
|
|
}
|
|
|
|
inline socket_t create_server_socket(const char* host, int port)
|
|
{
|
|
return create_socket(host, port, [](socket_t sock, struct sockaddr_in& addr) -> socket_t {
|
|
|
|
if (::bind(sock, (struct sockaddr*)&addr, sizeof(addr))) {
|
|
return -1;
|
|
}
|
|
|
|
// Listen through 5 channels
|
|
if (listen(sock, 5)) {
|
|
return -1;
|
|
}
|
|
|
|
return sock;
|
|
});
|
|
}
|
|
|
|
inline int close_server_socket(socket_t sock)
|
|
{
|
|
#ifdef _WIN32
|
|
shutdown(sock, SD_BOTH);
|
|
return closesocket(sock);
|
|
#else
|
|
shutdown(sock, SHUT_RDWR);
|
|
return close(sock);
|
|
#endif
|
|
}
|
|
|
|
inline socket_t create_client_socket(const char* host, int port)
|
|
{
|
|
return create_socket(host, port,
|
|
[](socket_t sock, struct sockaddr_in& addr) -> socket_t {
|
|
|
|
if (connect(sock, (struct sockaddr*)&addr, sizeof(struct sockaddr_in))) {
|
|
return -1;
|
|
}
|
|
|
|
return sock;
|
|
});
|
|
}
|
|
|
|
inline int close_client_socket(socket_t sock)
|
|
{
|
|
#ifdef _WIN32
|
|
return closesocket(sock);
|
|
#else
|
|
return close(sock);
|
|
#endif
|
|
}
|
|
|
|
inline const char* status_message(int status)
|
|
{
|
|
const char* s = NULL;
|
|
|
|
switch (status) {
|
|
case 400:
|
|
s = "Bad Request";
|
|
break;
|
|
case 404:
|
|
s = "Not Found";
|
|
break;
|
|
default:
|
|
status = 500;
|
|
s = "Internal Server Error";
|
|
break;
|
|
}
|
|
|
|
return s;
|
|
}
|
|
|
|
inline const char* get_header_value(const MultiMap& map, const char* key, const char* def)
|
|
{
|
|
auto it = map.find(key);
|
|
if (it != map.end()) {
|
|
return it->second.c_str();
|
|
}
|
|
return def;
|
|
}
|
|
|
|
inline int get_header_value_int(const MultiMap& map, const char* key, int def)
|
|
{
|
|
auto it = map.find(key);
|
|
if (it != map.end()) {
|
|
return std::atoi(it->second.c_str());
|
|
}
|
|
return def;
|
|
}
|
|
|
|
inline void read_headers(FILE* fp, MultiMap& headers)
|
|
{
|
|
static std::regex re("(.+?): (.+?)\r\n");
|
|
|
|
const size_t BUFSIZ_HEADER = 2048;
|
|
char buf[BUFSIZ_HEADER];
|
|
|
|
while (fgets(buf, BUFSIZ_HEADER, fp) && strcmp(buf, "\r\n")) {
|
|
std::cmatch m;
|
|
if (std::regex_match(buf, m, re)) {
|
|
auto key = std::string(m[1]);
|
|
auto val = std::string(m[2]);
|
|
headers.insert(std::make_pair(key, val));
|
|
}
|
|
}
|
|
}
|
|
|
|
inline std::string dump_headers(const MultiMap& headers)
|
|
{
|
|
std::string s;
|
|
char buf[BUFSIZ];
|
|
|
|
for (auto it = headers.begin(); it != headers.end(); ++it) {
|
|
const auto& x = *it;
|
|
snprintf(buf, sizeof(buf), "%s: %s\n", x.first.c_str(), x.second.c_str());
|
|
s += buf;
|
|
}
|
|
|
|
return s;
|
|
}
|
|
|
|
// HTTP server implementation
|
|
inline void Response::set_redirect(const char* url)
|
|
{
|
|
headers.insert(std::make_pair("Location", url));
|
|
status = 302;
|
|
}
|
|
|
|
inline void Response::set_content(const std::string& s, const char* content_type)
|
|
{
|
|
body = s;
|
|
headers.insert(std::make_pair("Content-Type", content_type));
|
|
}
|
|
|
|
inline Server::Server(const char* host, int port)
|
|
: host_(host)
|
|
, port_(port)
|
|
, sock_(-1)
|
|
{
|
|
#ifdef _WIN32
|
|
WSADATA wsaData;
|
|
WSAStartup(0x0002, &wsaData);
|
|
#endif
|
|
}
|
|
|
|
inline Server::~Server()
|
|
{
|
|
#ifdef _WIN32
|
|
WSACleanup();
|
|
#endif
|
|
}
|
|
|
|
inline void Server::get(const char* pattern, Handler handler)
|
|
{
|
|
get_handlers_.push_back(std::make_pair(pattern, handler));
|
|
}
|
|
|
|
inline void Server::post(const char* pattern, Handler handler)
|
|
{
|
|
post_handlers_.push_back(std::make_pair(pattern, handler));
|
|
}
|
|
|
|
inline void Server::error(Handler handler)
|
|
{
|
|
error_handler_ = handler;
|
|
}
|
|
|
|
inline void Server::set_logger(std::function<void (const Connection&)> logger)
|
|
{
|
|
logger_ = logger;
|
|
}
|
|
|
|
inline bool Server::run()
|
|
{
|
|
sock_ = create_server_socket(host_.c_str(), port_);
|
|
if (sock_ == -1) {
|
|
return false;
|
|
}
|
|
|
|
for (;;) {
|
|
socket_t fd = accept(sock_, NULL, NULL);
|
|
if (fd == -1) {
|
|
// The server socket was closed by user.
|
|
if (sock_ == -1) {
|
|
return true;
|
|
}
|
|
|
|
close_server_socket(sock_);
|
|
return false;
|
|
}
|
|
|
|
FILE* fp_read;
|
|
FILE* fp_write;
|
|
get_flie_pointers(fd, fp_read, fp_write);
|
|
|
|
process_request(fp_read, fp_write);
|
|
|
|
fflush(fp_write);
|
|
close_server_socket(fd);
|
|
}
|
|
|
|
// NOTREACHED
|
|
}
|
|
|
|
inline void Server::stop()
|
|
{
|
|
close_server_socket(sock_);
|
|
sock_ = -1;
|
|
}
|
|
|
|
inline bool Server::read_request_line(FILE* fp, Request& req)
|
|
{
|
|
const size_t BUFSIZ_REQUESTLINE = 2048;
|
|
char buf[BUFSIZ_REQUESTLINE];
|
|
if (!fgets(buf, BUFSIZ_REQUESTLINE, fp)) {
|
|
return false;
|
|
}
|
|
|
|
static std::regex re("(GET|POST) ([^?]+)(?:\\?(.+?))? HTTP/1\\.[01]\r\n");
|
|
|
|
std::cmatch m;
|
|
if (std::regex_match(buf, m, re)) {
|
|
req.method = std::string(m[1]);
|
|
req.url = std::string(m[2]);
|
|
|
|
// Parse query text
|
|
auto len = std::distance(m[3].first, m[3].second);
|
|
if (len > 0) {
|
|
const auto& pos = m[3];
|
|
split(pos.first, pos.second, '&', [&](const char* b, const char* e) {
|
|
std::string key;
|
|
std::string val;
|
|
split(b, e, '=', [&](const char* b, const char* e) {
|
|
if (key.empty()) {
|
|
key.assign(b, e);
|
|
} else {
|
|
val.assign(b, e);
|
|
}
|
|
});
|
|
req.query[key] = val;
|
|
});
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
inline void Server::write_response(FILE* fp, const Response& res)
|
|
{
|
|
fprintf(fp, "HTTP/1.0 %d %s\r\n", res.status, status_message(res.status));
|
|
fprintf(fp, "Connection: close\r\n");
|
|
|
|
for (auto it = res.headers.begin(); it != res.headers.end(); ++it) {
|
|
if (it->first != "Content-Type" && it->second != "Content-Length") {
|
|
fprintf(fp, "%s: %s\r\n", it->first.c_str(), it->second.c_str());
|
|
}
|
|
}
|
|
|
|
if (!res.body.empty()) {
|
|
auto content_type = get_header_value(res.headers, "Content-Type", "text/plain");
|
|
fprintf(fp, "Content-Type: %s\r\n", content_type);
|
|
fprintf(fp, "Content-Length: %ld\r\n", res.body.size());
|
|
}
|
|
|
|
fprintf(fp, "\r\n");
|
|
|
|
if (!res.body.empty()) {
|
|
fprintf(fp, "%s", res.body.c_str());
|
|
}
|
|
}
|
|
|
|
inline void Server::process_request(FILE* fp_read, FILE* fp_write)
|
|
{
|
|
Connection c;
|
|
|
|
if (!read_request_line(fp_read, c.request)) {
|
|
return;
|
|
}
|
|
|
|
read_headers(fp_read, c.request.headers);
|
|
|
|
// Routing
|
|
c.response.status = 0;
|
|
|
|
if (c.request.method == "GET") {
|
|
for (auto it = get_handlers_.begin(); it != get_handlers_.end(); ++it) {
|
|
const auto& pattern = it->first;
|
|
const auto& handler = it->second;
|
|
|
|
std::smatch m;
|
|
if (std::regex_match(c.request.url, m, pattern)) {
|
|
for (size_t i = 1; i < m.size(); i++) {
|
|
c.request.params.push_back(m[i]);
|
|
}
|
|
handler(c);
|
|
if (!c.response.status) {
|
|
c.response.status = 200;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
} else if (c.request.method == "POST") {
|
|
// TODO: parse body
|
|
} else {
|
|
c.response.status = 400;
|
|
}
|
|
|
|
if (!c.response.status) {
|
|
c.response.status = 404;
|
|
}
|
|
|
|
if (400 <= c.response.status) {
|
|
if (error_handler_) {
|
|
error_handler_(c);
|
|
}
|
|
}
|
|
|
|
if (logger_) {
|
|
logger_(c);
|
|
}
|
|
|
|
write_response(fp_write, c.response);
|
|
}
|
|
|
|
// HTTP client implementation
|
|
inline Client::Client(const char* host, int port)
|
|
: host_(host)
|
|
, port_(port)
|
|
{
|
|
#ifdef _WIN32
|
|
WSADATA wsaData;
|
|
WSAStartup(0x0002, &wsaData);
|
|
#endif
|
|
}
|
|
|
|
inline Client::~Client()
|
|
{
|
|
#ifdef _WIN32
|
|
WSACleanup();
|
|
#endif
|
|
}
|
|
|
|
inline bool Client::read_response_line(FILE* fp, Response& res)
|
|
{
|
|
const size_t BUFSIZ_RESPONSELINE = 2048;
|
|
char buf[BUFSIZ_RESPONSELINE];
|
|
if (!fgets(buf, BUFSIZ_RESPONSELINE, fp)) {
|
|
return false;
|
|
}
|
|
|
|
static std::regex re("HTTP/1\\.[01] (\\d+?) .+\r\n");
|
|
|
|
std::cmatch m;
|
|
if (std::regex_match(buf, m, re)) {
|
|
res.status = std::atoi(std::string(m[1]).c_str());
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
inline int Client::get(const char* url, Response& res)
|
|
{
|
|
socket_t sock = create_client_socket(host_.c_str(), port_);
|
|
if (sock == -1) {
|
|
return -1;
|
|
}
|
|
|
|
FILE* fp_read;
|
|
FILE* fp_write;
|
|
get_flie_pointers(sock, fp_read, fp_write);
|
|
|
|
// Send request
|
|
fprintf(fp_write, "GET %s HTTP/1.0\r\n\r\n", url);
|
|
fflush(fp_write);
|
|
|
|
if (!read_response_line(fp_read, res)) {
|
|
return -1;
|
|
}
|
|
|
|
read_headers(fp_read, res.headers);
|
|
|
|
// Read content body
|
|
auto len = get_header_value_int(res.headers, "Content-Length", 0);
|
|
if (len) {
|
|
res.body.assign(len, 0);
|
|
if (!fgets(&res.body[0], res.body.size() + 1, fp_read)) {
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
close_client_socket(sock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
} // namespace httplib
|
|
|
|
#endif
|
|
|
|
// vim: et ts=4 sw=4 cin cino={1s ff=unix
|