CGI Echo Example

// -- 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) // //////////////////////////////////////////////////////////////// // //[cgi_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 namespace cgi = boost::cgi; // The styling information for the page, just to make things look nicer. static const char* gCSS_text = "body { padding: 0; margin: 3%; border-color: #efe; }" ".var_map_title" "{ font-weight: bold; font-size: large; }" ".var_map" "{ border: 1px dotted; padding: 2px 3px; margin-bottom: 3%; }" ".var_pair" "{ border-top: 1px dotted; overflow: auto; padding: 0; margin: 0; }" ".var_name" "{ position: relative; float: left; width: 30%; font-weight: bold; }" ".var_value" "{ position: relative; float: left; width: 65%; left: 1%;" " border-left: 1px solid; padding: 0 5px 0 5px;" " overflow: auto; white-space: pre; }" ; // // This function writes the title and map contents to the ostream in an // HTML-encoded format (to make them easier on the eye). // // The request data is all held in std::map<>-like containers and can use the same // member functions. There are some additional functions included for common // CGI tasks, such as lexical casting. // template void format_map(OStream& os, Request& req, Map& m, const std::string& title) { os<< "

" "

" << title << "

"; if (m.empty()) os<< "

EMPTY

"; else { for (typename Map::const_iterator iter(m.begin()), end(m.end()); iter != m.end(); ++iter) { os<< "

" "

" << iter->first << "

" "

" << iter->second << (req.uploads.count(iter->first) ? " (file)" : "") << "

" "

"; } } os<< "

"; } int main() { // A basic CGI request auto-parses everything (including POST data). cgi::request req; cgi::response resp; // You can also stream text to a response. // All of this just prints out the form resp<< "" "" "CGI Echo Example" "" "" "" "Request ID = " << req.id() << "
" "

"; format_map(resp, req, req.env, "Environment Variables"); //format_map(resp, req, req.get, "GET Variables"); format_map(resp, req, req.form, "Form [" + req.method() + "] Variables"); format_map(resp, req, req.cookies, "Cookie Variables"); format_map(resp, req, req.uploads, "Uploaded Files"); // Note that this (and any other) HTTP header can go either before or after // the response contents. resp<< cgi::content_type("text/html"); // Send the response to the client that made the request. return cgi::commit(req, resp); } //]