mirror of https://github.com/davisking/dlib.git
139 lines
4.6 KiB
C++
139 lines
4.6 KiB
C++
// The contents of this file are in the public domain. See LICENSE_FOR_EXAMPLE_PROGRAMS.txt
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/*
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This example illustrates the use of the HTTP extension to the server object
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from the dlib C++ Library.
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It creates a server that always responds with a simple HTML form.
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To view the page this program displays you should go to http://localhost:5000
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*/
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#include <iostream>
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#include <sstream>
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#include <string>
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#include "dlib/server.h"
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#include "dlib/ref.h" // for ref()
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using namespace dlib;
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using namespace std;
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class web_server : public server::http_1a_c
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{
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const std::string on_request (
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const incoming_things& incoming,
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outgoing_things& outgoing
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)
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{
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try
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{
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ostringstream sout;
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// We are going to send back a page that contains an HTML form with two text input fields.
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// One field called name. The HTML form uses the post method but could also use the get
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// method (just change method='post' to method='get').
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sout << " <html> <body> "
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<< "<form action='/form_handler' method='post'> "
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<< "User Name: <input name='user' type='text'><br> "
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<< "User password: <input name='pass' type='text'> <input type='submit'> "
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<< " </form>";
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// Write out some of the inputs to this request so that they show up on the
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// resulting web page.
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sout << "<br> path = " << incoming.path << endl;
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sout << "<br> request_type = " << incoming.request_type << endl;
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sout << "<br> content_type = " << incoming.content_type << endl;
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sout << "<br> foreign_ip = " << incoming.foreign_ip << endl;
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sout << "<br> foreign_port = " << incoming.foreign_port << endl;
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sout << "<br> local_ip = " << incoming.local_ip << endl;
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sout << "<br> local_port = " << incoming.local_port << endl;
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sout << "<br> body = \"" << incoming.body << "\"" << endl;
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// If this request is the result of the user submitting the form then echo back
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// the submission.
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if (incoming.path == "/form_handler")
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{
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sout << "<h2> Stuff from the query string </h2>" << endl;
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sout << "<br> user = " << incoming.queries["user"] << endl;
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sout << "<br> pass = " << incoming.queries["pass"] << endl;
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// save these form submissions as cookies.
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outgoing.cookies["user"] = incoming.queries["user"];
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outgoing.cookies["pass"] = incoming.queries["pass"];
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}
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// Echo any cookies back to the client browser
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sout << "<h2>Cookies we sent to the server</h2>";
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for ( key_value_map::const_iterator ci = incoming.cookies.begin(); ci != incoming.cookies.end(); ++ci )
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{
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sout << "<br/>" << ci->first << " = " << ci->second << endl;
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}
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sout << "<br/><br/>";
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sout << "<h2>HTTP Headers we sent to the server</h2>";
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// Echo out all the HTTP headers we received from the client web browser
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for ( key_value_map::const_iterator ci = incoming.headers.begin(); ci != incoming.headers.end(); ++ci )
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{
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sout << "<br/>" << ci->first << ": " << ci->second << endl;
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}
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sout << "</body> </html>";
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return sout.str();
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}
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catch (exception& e)
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{
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return e.what();
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}
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}
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};
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void thread(web_server& the_server)
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{
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try
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{
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// Start the server. start() blocks until the server is shutdown
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// by a call to clear()
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the_server.start();
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}
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catch (socket_error& e)
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{
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cout << "Socket error while starting server: " << e.what() << endl;
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}
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catch (exception& e)
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{
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cout << "Error while starting server: " << e.what() << endl;
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}
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}
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int main()
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{
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try
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{
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// create an instance of our web server
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web_server our_web_server;
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// make it listen on port 5000
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our_web_server.set_listening_port(5000);
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// create a thread that will start the server. The ref() here allows us to pass
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// our_web_server into the threaded function by reference.
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thread_function t(thread, dlib::ref(our_web_server));
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cout << "Press enter to end this program" << endl;
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cin.get();
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// this will cause the server to shut down
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our_web_server.clear();
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}
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catch (exception& e)
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{
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cout << e.what() << endl;
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}
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}
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