sandbox / Mbed OS http-webserver-example

Webserver example for mbed OS 5 - HTTP 1.1 and multi-threaded

Dependencies:   mbed-http

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main.cpp

00001 #include "mbed.h"
00002 #include "easy-connect.h"
00003 #include "http_server.h"
00004 #include "http_response_builder.h"
00005 
00006 Serial pc(USBTX, USBRX);
00007 DigitalOut led(LED1);
00008 
00009 // Requests come in here
00010 void request_handler(ParsedHttpRequest* request, TCPSocket* socket) {
00011 
00012     printf("Request came in: %s %s\n", http_method_str(request->get_method()), request->get_url().c_str());
00013 
00014     if (request->get_method() == HTTP_GET && request->get_url() == "/") {
00015         HttpResponseBuilder builder(200);
00016         builder.set_header("Content-Type", "text/html; charset=utf-8");
00017 
00018         char response[] = "<html><head><title>Hello from mbed</title></head>"
00019             "<body>"
00020                 "<h1>mbed webserver</h1>"
00021                 "<button id=\"toggle\">Toggle LED</button>"
00022                 "<script>document.querySelector('#toggle').onclick = function() {"
00023                     "var x = new XMLHttpRequest(); x.open('POST', '/toggle'); x.send();"
00024                 "}</script>"
00025             "</body></html>";
00026 
00027         builder.send(socket, response, sizeof(response) - 1);
00028     }
00029     else if (request->get_method() == HTTP_POST && request->get_url() == "/toggle") {
00030         printf("toggle LED called\n");
00031         led = !led;
00032 
00033         HttpResponseBuilder builder(200);
00034         builder.send(socket, NULL, 0);
00035     }
00036     else {
00037         HttpResponseBuilder builder(404);
00038         builder.send(socket, NULL, 0);
00039     }
00040 }
00041 
00042 int main() {
00043     pc.baud(115200);
00044 
00045     // Connect to the network (see mbed_app.json for the connectivity method used)
00046     NetworkInterface* network = easy_connect(true);
00047     if (!network) {
00048         printf("Cannot connect to the network, see serial output\n");
00049         return 1;
00050     }
00051 
00052     HttpServer server(network);
00053     nsapi_error_t res = server.start(8080, &request_handler);
00054 
00055     if (res == NSAPI_ERROR_OK) {
00056         printf("Server is listening at http://%s:8080\n", network->get_ip_address());
00057     }
00058     else {
00059         printf("Server could not be started... %d\n", res);
00060     }
00061 
00062     wait(osWaitForever);
00063 }
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