FastCGI Echo Example

// -- echo/main.hpp -- // // Copyright (c) Darren Garvey 2007-2009. // Distributed under the Boost Software License, Version 1.0. // (See accompanying file LICENSE_1_0.txt or copy at // http://www.boost.org/LICENSE_1_0.txt) // //////////////////////////////////////////////////////////////// // //[fcgi_echo // // This example simply echoes all variables back to the user. ie. // the environment and the parsed GET, POST and cookie variables. // Note that GET and cookie variables come from the environment // variables QUERY_STRING and HTTP_COOKIE respectively. // /////////////////////////////////////////////////////////// #include /////////////////////////////////////////////////////////// #include #include /////////////////////////////////////////////////////////// #include "boost/cgi/fcgi.hpp" //using namespace std; using std::cerr; using std::endl; namespace fcgi = boost::fcgi; // The styling information for the page, just to make things look clearer. static const char* gCSS_text = "body { padding: 0; margin: 3%; border-color: #efe; }" "ul.data-map .title" "{ font-weight: bold; font-size: large; }" "ul.data-map" "{ border: 1px dotted; padding: 2px 3px 2px 3px; margin-bottom: 3%; }" "ul.data-map li" "{ border-top: 1px dotted; overflow: auto; padding: 0; margin: 0; }" "ul.data-map div.name" "{ position: relative; float: left; width: 30%; font-weight: bold; }" "ul.data-map div.value" "{ position: relative; float: left; width: 65%; left: 1%;" " border-left: 1px solid; padding: 0 5px 0 5px;" " overflow: auto; white-space: pre; }" ".clear" "{ clear: both; }" ; std::size_t process_id() { #if defined(BOOST_WINDOWS) return _getpid(); #else return getpid(); #endif } template void format_map(OStream& os, Request& req, Map& m, const std::string& title); int handle_request(fcgi::request& req); int main() { try { // Make a `service` (more about this in other examples). fcgi::service s; // Make an `acceptor` for accepting requests through. fcgi::acceptor a(s); // // An acceptor can take a request handler as an argument to `accept` and it // will accept a request and pass the handler the request. The return value // of `accept` when used like this is the result of the handler. // // Note that a request handler is any function or function object with the // signature: // boost::function // See the documentation for Boost.Function and Boost.Bind for more. // // The acceptor maintains an internal queue of requests and will reuse a // dead request if one is waiting. // // After the initial setup, we can enter a loop to handle one request at a // time until there's an error of some sort. // int status(0); do { status = a.accept(&handle_request); } while (!status); return status; }catch(boost::system::system_error const& se){ // This is the type of exception thrown by the library. std::cerr<< "[fcgi] System error: " << se.what() << std::endl; return -1; }catch(std::exception const& e){ // Catch any other exceptions std::cerr<< "[fcgi] Exception: " << e.what() << std::endl; return -2; }catch(...){ std::cerr<< "[fcgi] Uncaught exception!" << std::endl; return -3; } } /// Handle one request. int handle_request(fcgi::request& req) { boost::system::error_code ec; // // Load in the request data so we can access it easily. // req.load(fcgi::parse_all); // // Construct a `response` object (makes writing/sending responses easier). // fcgi::response resp; // // Responses in CGI programs require at least a 'Content-type' header. The // library provides helpers for several common headers: // resp<< fcgi::content_type("text/html"); // You can also stream text to a response. // All of this just prints out the form resp<< "" "" "FastCGI Echo Example" "" "" "" "Request ID = " << req.id() << "
" "Process ID = " << process_id() << "
" "

"; // Show the request data in a formatted table. format_map(resp, req, req.env, "Environment Variables"); format_map(resp, req, req.get, "GET Variables"); format_map(resp, req, req.post, "POST Variables"); format_map(resp, req, req.uploads, "File Uploads"); format_map(resp, req, req.cookies, "Cookie Variables"); // Print the buffer containing the POST data and the FastCGI params. resp<< "

";
  resp<< std::string(req.post_buffer().begin(), req.post_buffer().end());
  resp<< "

"; // // Response headers can be added at any time before send/flushing it: // resp<< "Response content-length == " << resp.content_length(); // the content-length (returns std::size_t) // This function finishes up. The optional third argument // is the program status (default: 0). return fcgi::commit(req, resp); } // // This function writes the title and map contents to the ostream in an // HTML-encoded format (to make them easier on the eye). // template void format_map(OStream& os, Request& req, Map& m, const std::string& title) { os<< "

" << title << "

EMPTY
" "
" << i->first << "
" "
" << i->second << "
" "

"; } //]