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Fast CGI example in C++ using official fcgi library
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| /* | |
| using official fcgi++ library | |
| Reference to fcgi protocol at https://tools.ietf.org/html/rfc3875#section-6.2.1 | |
| Build: g++ main.cpp -lfcgi++ -lfcgi -o main | |
| Spawn: spawn-fcgi -a 127.0.0.1 -p 9105 -n -- main | |
| */ | |
| #include <iostream> | |
| #include <string> | |
| #include <thread> | |
| #include <string_view> | |
| #include <fstream> | |
| #include <algorithm> | |
| #include <vector> | |
| #include <iterator> | |
| #include <fcgio.h> | |
| #include <fcgiapp.h> | |
| #include <unistd.h> | |
| using namespace std; | |
| enum class Request_method{GET, HEAD ,POST, PUT, DELETE}; | |
| Request_method to_Request_method(string_view method) { | |
| if (method == "GET") | |
| return Request_method::GET; | |
| else if(method == "POST") | |
| return Request_method::POST; | |
| else | |
| throw runtime_error{"not support method"}; | |
| } | |
| void on_load() { | |
| } | |
| void on_unload() { | |
| } | |
| void handle_request(FCGX_Request& request) | |
| { | |
| fcgi_streambuf cin_fcgi_streambuf(request.in); | |
| fcgi_streambuf cout_fcgi_streambuf(request.out); | |
| fcgi_streambuf cerr_fcgi_streambuf(request.err); | |
| ostream os{&cout_fcgi_streambuf}; | |
| ostream errs{&cerr_fcgi_streambuf}; | |
| istream is{&cin_fcgi_streambuf}; | |
| char *query_string = FCGX_GetParam("QUERY_STRING", request.envp); | |
| string script_name{FCGX_GetParam("SCRIPT_NAME", request.envp)}; | |
| Request_method method = to_Request_method({FCGX_GetParam("REQUEST_METHOD", request.envp)}); | |
| switch (method) { | |
| case Request_method::GET: | |
| if (script_name == "/") | |
| os << "Location:https://www.youtube.com/user/skylargrey\r\n\r\n"; | |
| else { | |
| sleep(10); | |
| os << "Content-type: application/json\r\n" | |
| << "\r\n" | |
| << "{\"hi\":\"hehe\",\"hi\":\"hehe\"}\n"; | |
| } | |
| break; | |
| case Request_method::POST: | |
| long int body_length = atoi(FCGX_GetParam("CONTENT_LENGTH", request.envp)); | |
| cout<< "body length:"<< body_length << '\n'; | |
| string body{}; | |
| char c; | |
| int i = 0; | |
| while(is.get(c)) { | |
| body +=c; | |
| } | |
| std::cout<<body<<endl; | |
| os << "Content-type: application/json\r\n" | |
| << "\r\n" | |
| << "{\"hi\":\"hehe\",\"hi\":\"hehe\"}\n"; | |
| break; | |
| } | |
| } | |
| int main() | |
| { | |
| FCGX_Request request; | |
| FCGX_Init(); | |
| FCGX_InitRequest(&request, 0, 0); | |
| while (FCGX_Accept_r(&request) == 0) { | |
| handle_request(request); | |
| } | |
| } |
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