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
- Committer:
- Jan Jongboom
- Date:
- 2017-07-31
- Revision:
- 1:fe3df398bdf5
- Parent:
- 0:41f820ea137a
File content as of revision 1:fe3df398bdf5:
#include "mbed.h" #include "easy-connect.h" #include "http_server.h" #include "http_response_builder.h" Serial pc(USBTX, USBRX); DigitalOut led(LED1); // Requests come in here void request_handler(ParsedHttpRequest* request, TCPSocket* socket) { printf("Request came in: %s %s\n", http_method_str(request->get_method()), request->get_url().c_str()); if (request->get_method() == HTTP_GET && request->get_url() == "/") { HttpResponseBuilder builder(200); builder.set_header("Content-Type", "text/html; charset=utf-8"); char response[] = "<html><head><title>Hello from mbed</title></head>" "<body>" "<h1>mbed webserver</h1>" "<button id=\"toggle\">Toggle LED</button>" "<script>document.querySelector('#toggle').onclick = function() {" "var x = new XMLHttpRequest(); x.open('POST', '/toggle'); x.send();" "}</script>" "</body></html>"; builder.send(socket, response, sizeof(response) - 1); } else if (request->get_method() == HTTP_POST && request->get_url() == "/toggle") { printf("toggle LED called\n"); led = !led; HttpResponseBuilder builder(200); builder.send(socket, NULL, 0); } else { HttpResponseBuilder builder(404); builder.send(socket, NULL, 0); } } int main() { pc.baud(115200); // Connect to the network (see mbed_app.json for the connectivity method used) NetworkInterface* network = easy_connect(true); if (!network) { printf("Cannot connect to the network, see serial output\n"); return 1; } HttpServer server(network); nsapi_error_t res = server.start(8080, &request_handler); if (res == NSAPI_ERROR_OK) { printf("Server is listening at http://%s:8080\n", network->get_ip_address()); } else { printf("Server could not be started... %d\n", res); } wait(osWaitForever); }