mirror of
https://github.com/yhirose/cpp-httplib
synced 2024-11-21 14:29:10 -07:00
618 lines
13 KiB
C++
618 lines
13 KiB
C++
//
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// httplib.h
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//
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// Copyright (c) 2012 Yuji Hirose. All rights reserved.
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// The Boost Software License 1.0
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//
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#ifndef HTTPSVRKIT_H
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#define HTTPSVRKIT_H
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#ifdef _WIN32
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#define _CRT_SECURE_NO_WARNINGS
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#define _CRT_NONSTDC_NO_DEPRECATE
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#ifndef SO_SYNCHRONOUS_NONALERT
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#define SO_SYNCHRONOUS_NONALERT 0x20;
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#endif
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#ifndef SO_OPENTYPE
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#define SO_OPENTYPE 0x7008
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#endif
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#include <fcntl.h>
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#include <io.h>
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#include <winsock2.h>
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typedef SOCKET socket_t;
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#else
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#include <pthread.h>
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#include <unistd.h>
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#include <netdb.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <sys/socket.h>
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typedef int socket_t;
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#endif
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#include <functional>
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#include <map>
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#include <regex>
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#include <string>
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#include <assert.h>
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namespace httplib
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{
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typedef std::map<std::string, std::string> Map;
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typedef std::multimap<std::string, std::string> MultiMap;
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typedef std::smatch Match;
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struct Request {
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std::string method;
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std::string url;
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MultiMap headers;
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std::string body;
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Map query;
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Match match;
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bool has_header(const char* key) const;
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std::string get_header_value(const char* key) const;
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};
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struct Response {
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int status;
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MultiMap headers;
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std::string body;
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bool has_header(const char* key) const;
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std::string get_header_value(const char* key) const;
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void set_header(const char* key, const char* val);
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void set_redirect(const char* url);
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void set_content(const std::string& s, const char* content_type);
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};
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struct Connection {
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Request request;
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Response response;
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};
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class Server {
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public:
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typedef std::function<void (Connection& c)> Handler;
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Server(const char* host, int port);
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~Server();
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void get(const char* pattern, Handler handler);
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void post(const char* pattern, Handler handler);
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void set_error_handler(Handler handler);
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void set_logger(Handler logger);
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bool run();
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void stop();
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private:
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typedef std::vector<std::pair<std::regex, Handler>> Handlers;
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void process_request(FILE* fp_read, FILE* fp_write);
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bool read_request_line(FILE* fp, Request& req);
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void write_response(FILE* fp, const Response& res);
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void dispatch_request(Connection& c, Handlers& handlers);
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const std::string host_;
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const int port_;
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socket_t sock_;
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Handlers get_handlers_;
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Handlers post_handlers_;
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Handler error_handler_;
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Handler logger_;
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};
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class Client {
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public:
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Client(const char* host, int port);
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~Client();
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bool get(const char* url, Response& res);
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private:
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bool read_response_line(FILE* fp, Response& res);
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const std::string host_;
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const int port_;
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};
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// Implementation
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template <class Fn>
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void split(const char* b, const char* e, char d, Fn fn)
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{
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int i = 0;
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int beg = 0;
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while (e ? (b + i != e) : (b[i] != '\0')) {
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if (b[i] == d) {
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fn(&b[beg], &b[i]);
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beg = i + 1;
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}
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i++;
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}
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if (i) {
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fn(&b[beg], &b[i]);
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}
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}
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inline void get_flie_pointers(int fd, FILE*& fp_read, FILE*& fp_write)
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{
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#ifdef _WIN32
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int osfhandle = _open_osfhandle(fd, _O_RDONLY);
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fp_read = fdopen(osfhandle, "rb");
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fp_write = fdopen(osfhandle, "wb");
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#else
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fp_read = fdopen(fd, "rb");
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fp_write = fdopen(fd, "wb");
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#endif
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}
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template <typename Fn>
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socket_t create_socket(const char* host, int port, Fn fn)
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{
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#ifdef _WIN32
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int opt = SO_SYNCHRONOUS_NONALERT;
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setsockopt(INVALID_SOCKET, SOL_SOCKET, SO_OPENTYPE, (char*)&opt, sizeof(opt));
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#endif
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// Create a server socket
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socket_t sock = socket(AF_INET, SOCK_STREAM, 0);
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if (sock == -1) {
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return -1;
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}
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// Make 'reuse address' option available
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int yes = 1;
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setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (char*)&yes, sizeof(yes));
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// Get a host entry info
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struct hostent* hp;
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if (!(hp = gethostbyname(host))) {
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return -1;
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}
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// Bind the socket to the given address
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struct sockaddr_in addr;
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memset(&addr, 0, sizeof(addr));
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memcpy(&addr.sin_addr, hp->h_addr, hp->h_length);
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addr.sin_family = AF_INET;
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addr.sin_port = htons(port);
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return fn(sock, addr);
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}
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inline socket_t create_server_socket(const char* host, int port)
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{
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return create_socket(host, port, [](socket_t sock, struct sockaddr_in& addr) -> socket_t {
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if (::bind(sock, (struct sockaddr*)&addr, sizeof(addr))) {
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return -1;
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}
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// Listen through 5 channels
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if (listen(sock, 5)) {
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return -1;
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}
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return sock;
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});
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}
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inline int close_server_socket(socket_t sock)
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{
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#ifdef _WIN32
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shutdown(sock, SD_BOTH);
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return closesocket(sock);
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#else
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shutdown(sock, SHUT_RDWR);
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return close(sock);
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#endif
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}
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inline socket_t create_client_socket(const char* host, int port)
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{
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return create_socket(host, port,
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[](socket_t sock, struct sockaddr_in& addr) -> socket_t {
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if (connect(sock, (struct sockaddr*)&addr, sizeof(struct sockaddr_in))) {
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return -1;
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}
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return sock;
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});
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}
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inline int close_client_socket(socket_t sock)
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{
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#ifdef _WIN32
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return closesocket(sock);
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#else
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return close(sock);
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#endif
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}
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inline const char* status_message(int status)
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{
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const char* s = NULL;
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switch (status) {
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case 400:
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s = "Bad Request";
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break;
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case 404:
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s = "Not Found";
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break;
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default:
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status = 500;
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s = "Internal Server Error";
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break;
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}
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return s;
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}
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inline const char* get_header_value_text(const MultiMap& map, const char* key, const char* def)
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{
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auto it = map.find(key);
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if (it != map.end()) {
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return it->second.c_str();
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}
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return def;
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}
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inline int get_header_value_int(const MultiMap& map, const char* key, int def)
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{
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auto it = map.find(key);
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if (it != map.end()) {
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return std::atoi(it->second.c_str());
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}
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return def;
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}
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inline bool read_headers(FILE* fp, MultiMap& headers)
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{
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static std::regex re("(.+?): (.+?)\r\n");
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const size_t BUFSIZ_HEADER = 2048;
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char buf[BUFSIZ_HEADER];
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for (;;) {
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if (!fgets(buf, BUFSIZ_HEADER, fp)) {
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return false;
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}
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if (!strcmp(buf, "\r\n")) {
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break;
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}
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std::cmatch m;
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if (std::regex_match(buf, m, re)) {
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auto key = std::string(m[1]);
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auto val = std::string(m[2]);
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headers.insert(std::make_pair(key, val));
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}
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}
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return true;
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}
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template <typename T>
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bool read_content(T& x, FILE* fp)
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{
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auto len = get_header_value_int(x.headers, "Content-Length", 0);
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if (len) {
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x.body.assign(len, 0);
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if (!fgets(&x.body[0], x.body.size() + 1, fp)) {
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return false;
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}
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}
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return true;
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}
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// HTTP server implementation
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inline bool Request::has_header(const char* key) const
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{
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return headers.find(key) != headers.end();
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}
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inline std::string Request::get_header_value(const char* key) const
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{
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return get_header_value_text(headers, key, "");
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}
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inline bool Response::has_header(const char* key) const
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{
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return headers.find(key) != headers.end();
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}
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inline std::string Response::get_header_value(const char* key) const
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{
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return get_header_value_text(headers, key, "");
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}
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inline void Response::set_header(const char* key, const char* val)
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{
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headers.insert(std::make_pair(key, val));
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}
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inline void Response::set_redirect(const char* url)
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{
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set_header("Location", url);
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status = 302;
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}
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inline void Response::set_content(const std::string& s, const char* content_type)
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{
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body = s;
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set_header("Content-Type", content_type);
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}
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inline Server::Server(const char* host, int port)
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: host_(host)
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, port_(port)
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, sock_(-1)
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{
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#ifdef _WIN32
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WSADATA wsaData;
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WSAStartup(0x0002, &wsaData);
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#endif
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}
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inline Server::~Server()
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{
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#ifdef _WIN32
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WSACleanup();
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#endif
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}
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inline void Server::get(const char* pattern, Handler handler)
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{
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get_handlers_.push_back(std::make_pair(pattern, handler));
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}
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inline void Server::post(const char* pattern, Handler handler)
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{
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post_handlers_.push_back(std::make_pair(pattern, handler));
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}
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inline void Server::set_error_handler(Handler handler)
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{
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error_handler_ = handler;
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}
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inline void Server::set_logger(Handler logger)
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{
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logger_ = logger;
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}
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inline bool Server::run()
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{
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sock_ = create_server_socket(host_.c_str(), port_);
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if (sock_ == -1) {
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return false;
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}
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for (;;) {
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socket_t fd = accept(sock_, NULL, NULL);
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if (fd == -1) {
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// The server socket was closed by user.
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if (sock_ == -1) {
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return true;
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}
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close_server_socket(sock_);
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return false;
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}
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FILE* fp_read;
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FILE* fp_write;
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get_flie_pointers(fd, fp_read, fp_write);
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process_request(fp_read, fp_write);
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fflush(fp_write);
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close_server_socket(fd);
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}
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// NOTREACHED
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}
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inline void Server::stop()
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{
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close_server_socket(sock_);
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sock_ = -1;
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}
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inline bool Server::read_request_line(FILE* fp, Request& req)
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{
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const size_t BUFSIZ_REQUESTLINE = 2048;
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char buf[BUFSIZ_REQUESTLINE];
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if (!fgets(buf, BUFSIZ_REQUESTLINE, fp)) {
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return false;
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}
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static std::regex re("(GET|POST) ([^?]+)(?:\\?(.+?))? HTTP/1\\.[01]\r\n");
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std::cmatch m;
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if (std::regex_match(buf, m, re)) {
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req.method = std::string(m[1]);
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req.url = std::string(m[2]);
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// Parse query text
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auto len = std::distance(m[3].first, m[3].second);
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if (len > 0) {
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const auto& pos = m[3];
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split(pos.first, pos.second, '&', [&](const char* b, const char* e) {
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std::string key;
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std::string val;
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split(b, e, '=', [&](const char* b, const char* e) {
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if (key.empty()) {
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key.assign(b, e);
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} else {
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val.assign(b, e);
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}
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});
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req.query[key] = val;
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});
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}
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return true;
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}
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return false;
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}
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inline void Server::write_response(FILE* fp, const Response& res)
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{
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fprintf(fp, "HTTP/1.0 %d %s\r\n", res.status, status_message(res.status));
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fprintf(fp, "Connection: close\r\n");
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for (auto it = res.headers.begin(); it != res.headers.end(); ++it) {
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if (it->first != "Content-Type" && it->second != "Content-Length") {
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fprintf(fp, "%s: %s\r\n", it->first.c_str(), it->second.c_str());
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}
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}
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if (!res.body.empty()) {
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auto content_type = get_header_value_text(res.headers, "Content-Type", "text/plain");
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fprintf(fp, "Content-Type: %s\r\n", content_type);
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fprintf(fp, "Content-Length: %ld\r\n", res.body.size());
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}
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fprintf(fp, "\r\n");
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if (!res.body.empty()) {
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fprintf(fp, "%s", res.body.c_str());
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}
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}
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inline void Server::dispatch_request(Connection& c, Handlers& handlers)
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{
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for (auto it = handlers.begin(); it != handlers.end(); ++it) {
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const auto& pattern = it->first;
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const auto& handler = it->second;
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if (std::regex_match(c.request.url, c.request.match, pattern)) {
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handler(c);
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if (!c.response.status) {
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c.response.status = 200;
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}
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break;
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}
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}
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}
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inline void Server::process_request(FILE* fp_read, FILE* fp_write)
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{
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Connection c;
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if (!read_request_line(fp_read, c.request) ||
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!read_headers(fp_read, c.request.headers)) {
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return;
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}
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// Routing
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c.response.status = 0;
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if (c.request.method == "GET") {
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dispatch_request(c, get_handlers_);
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} else if (c.request.method == "POST") {
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if (!read_content(c.request, fp_read)) {
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return;
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}
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dispatch_request(c, post_handlers_);
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}
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if (!c.response.status) {
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c.response.status = 404;
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}
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if (400 <= c.response.status && error_handler_) {
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error_handler_(c);
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}
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write_response(fp_write, c.response);
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if (logger_) {
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logger_(c);
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}
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}
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// HTTP client implementation
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inline Client::Client(const char* host, int port)
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: host_(host)
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, port_(port)
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{
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#ifdef _WIN32
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WSADATA wsaData;
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WSAStartup(0x0002, &wsaData);
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#endif
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}
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inline Client::~Client()
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{
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#ifdef _WIN32
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WSACleanup();
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#endif
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}
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inline bool Client::read_response_line(FILE* fp, Response& res)
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{
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const size_t BUFSIZ_RESPONSELINE = 2048;
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char buf[BUFSIZ_RESPONSELINE];
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if (!fgets(buf, BUFSIZ_RESPONSELINE, fp)) {
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return false;
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}
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static std::regex re("HTTP/1\\.[01] (\\d+?) .+\r\n");
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std::cmatch m;
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if (std::regex_match(buf, m, re)) {
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res.status = std::atoi(std::string(m[1]).c_str());
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}
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return true;
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}
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inline bool Client::get(const char* url, Response& res)
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{
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socket_t sock = create_client_socket(host_.c_str(), port_);
|
|
if (sock == -1) {
|
|
return false;
|
|
}
|
|
|
|
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) ||
|
|
!read_headers(fp_read, res.headers) ||
|
|
!read_content(res, fp_read)) {
|
|
return false;
|
|
}
|
|
|
|
close_client_socket(sock);
|
|
|
|
return true;
|
|
}
|
|
|
|
} // namespace httplib
|
|
|
|
#endif
|
|
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// vim: et ts=4 sw=4 cin cino={1s ff=unix
|