Webserver example for mbed OS 5 - HTTP 1.1 and multi-threaded
Dependencies: mbed-http
mbed-os-example-http-server
This application demonstrates how to run an HTTP server on an mbed OS 5 device.
Request parsing is done through nodejs/http-parser.
To build
- Open
mbed_app.json
and change thenetwork-interface
option to your connectivity method (more info). - Build the project in the online compiler or using mbed CLI.
- Flash the project to your development board.
- Attach a serial monitor to your board to see the debug messages.
Tested on
- K64F with Ethernet.
- NUCLEO_F411RE with ESP8266.
- For ESP8266, you need this patch.
But every networking stack that supports the mbed OS 5 NetworkInterface API should work.
source/main.cpp@1:fe3df398bdf5, 2017-07-31 (annotated)
- Committer:
- Jan Jongboom
- Date:
- Mon Jul 31 17:12:21 2017 +0200
- Revision:
- 1:fe3df398bdf5
- Parent:
- 0:41f820ea137a
Compatibility with LwIP. Fix memory leaks.
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
Jan Jongboom |
0:41f820ea137a | 1 | #include "mbed.h" |
Jan Jongboom |
0:41f820ea137a | 2 | #include "easy-connect.h" |
Jan Jongboom |
0:41f820ea137a | 3 | #include "http_server.h" |
Jan Jongboom |
0:41f820ea137a | 4 | #include "http_response_builder.h" |
Jan Jongboom |
0:41f820ea137a | 5 | |
Jan Jongboom |
0:41f820ea137a | 6 | Serial pc(USBTX, USBRX); |
Jan Jongboom |
0:41f820ea137a | 7 | DigitalOut led(LED1); |
Jan Jongboom |
0:41f820ea137a | 8 | |
Jan Jongboom |
0:41f820ea137a | 9 | // Requests come in here |
Jan Jongboom |
0:41f820ea137a | 10 | void request_handler(ParsedHttpRequest* request, TCPSocket* socket) { |
Jan Jongboom |
0:41f820ea137a | 11 | |
Jan Jongboom |
0:41f820ea137a | 12 | printf("Request came in: %s %s\n", http_method_str(request->get_method()), request->get_url().c_str()); |
Jan Jongboom |
0:41f820ea137a | 13 | |
Jan Jongboom |
0:41f820ea137a | 14 | if (request->get_method() == HTTP_GET && request->get_url() == "/") { |
Jan Jongboom |
0:41f820ea137a | 15 | HttpResponseBuilder builder(200); |
Jan Jongboom |
0:41f820ea137a | 16 | builder.set_header("Content-Type", "text/html; charset=utf-8"); |
Jan Jongboom |
0:41f820ea137a | 17 | |
Jan Jongboom |
0:41f820ea137a | 18 | char response[] = "<html><head><title>Hello from mbed</title></head>" |
Jan Jongboom |
0:41f820ea137a | 19 | "<body>" |
Jan Jongboom |
0:41f820ea137a | 20 | "<h1>mbed webserver</h1>" |
Jan Jongboom |
0:41f820ea137a | 21 | "<button id=\"toggle\">Toggle LED</button>" |
Jan Jongboom |
0:41f820ea137a | 22 | "<script>document.querySelector('#toggle').onclick = function() {" |
Jan Jongboom |
0:41f820ea137a | 23 | "var x = new XMLHttpRequest(); x.open('POST', '/toggle'); x.send();" |
Jan Jongboom |
0:41f820ea137a | 24 | "}</script>" |
Jan Jongboom |
0:41f820ea137a | 25 | "</body></html>"; |
Jan Jongboom |
0:41f820ea137a | 26 | |
Jan Jongboom |
0:41f820ea137a | 27 | builder.send(socket, response, sizeof(response) - 1); |
Jan Jongboom |
0:41f820ea137a | 28 | } |
Jan Jongboom |
0:41f820ea137a | 29 | else if (request->get_method() == HTTP_POST && request->get_url() == "/toggle") { |
Jan Jongboom |
0:41f820ea137a | 30 | printf("toggle LED called\n"); |
Jan Jongboom |
0:41f820ea137a | 31 | led = !led; |
Jan Jongboom |
0:41f820ea137a | 32 | |
Jan Jongboom |
0:41f820ea137a | 33 | HttpResponseBuilder builder(200); |
Jan Jongboom |
0:41f820ea137a | 34 | builder.send(socket, NULL, 0); |
Jan Jongboom |
0:41f820ea137a | 35 | } |
Jan Jongboom |
0:41f820ea137a | 36 | else { |
Jan Jongboom |
0:41f820ea137a | 37 | HttpResponseBuilder builder(404); |
Jan Jongboom |
0:41f820ea137a | 38 | builder.send(socket, NULL, 0); |
Jan Jongboom |
0:41f820ea137a | 39 | } |
Jan Jongboom |
0:41f820ea137a | 40 | } |
Jan Jongboom |
0:41f820ea137a | 41 | |
Jan Jongboom |
0:41f820ea137a | 42 | int main() { |
Jan Jongboom |
0:41f820ea137a | 43 | pc.baud(115200); |
Jan Jongboom |
0:41f820ea137a | 44 | |
Jan Jongboom |
0:41f820ea137a | 45 | // Connect to the network (see mbed_app.json for the connectivity method used) |
Jan Jongboom |
0:41f820ea137a | 46 | NetworkInterface* network = easy_connect(true); |
Jan Jongboom |
0:41f820ea137a | 47 | if (!network) { |
Jan Jongboom |
0:41f820ea137a | 48 | printf("Cannot connect to the network, see serial output\n"); |
Jan Jongboom |
0:41f820ea137a | 49 | return 1; |
Jan Jongboom |
0:41f820ea137a | 50 | } |
Jan Jongboom |
0:41f820ea137a | 51 | |
Jan Jongboom |
0:41f820ea137a | 52 | HttpServer server(network); |
Jan Jongboom |
0:41f820ea137a | 53 | nsapi_error_t res = server.start(8080, &request_handler); |
Jan Jongboom |
0:41f820ea137a | 54 | |
Jan Jongboom |
0:41f820ea137a | 55 | if (res == NSAPI_ERROR_OK) { |
Jan Jongboom |
0:41f820ea137a | 56 | printf("Server is listening at http://%s:8080\n", network->get_ip_address()); |
Jan Jongboom |
0:41f820ea137a | 57 | } |
Jan Jongboom |
0:41f820ea137a | 58 | else { |
Jan Jongboom |
0:41f820ea137a | 59 | printf("Server could not be started... %d\n", res); |
Jan Jongboom |
0:41f820ea137a | 60 | } |
Jan Jongboom |
0:41f820ea137a | 61 | |
Jan Jongboom |
0:41f820ea137a | 62 | wait(osWaitForever); |
Jan Jongboom |
0:41f820ea137a | 63 | } |