Bongjun Hur
Simple Webserver example for wiznet W5500 (SPI Ethernet chip) mbed OS 5 - HTTP 1.1 and multi-threaded
Dependencies: W5500Interface easy-connect mbed-http
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http-webserver-example
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mbed-os-example-http-server
This application demonstrates how to run an HTTP server on an mbed OS 5 device & WIZnet W5500 Ethernet components.
Request parsing is done through [nodejs/http-parser](https://github.com/nodejs/http-parser).
To build
- Open ``mbed_app.json`` and change the `network-interface` option to your connectivity method ([more info](https://github.com/ARMmbed/easy-connect)).
- 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
- NUCLEO_F411RE with W5500 Ethernet shield.
- For W5500, you need the following libraries.
Import libraryeasy-connect
Modified version of easy-connect for W5500 Ethernet components
Last commit 13 Aug 2018 by
Bongjun Hur
But every networking stack that supports the [mbed OS 5 NetworkInterface API](https://docs.mbed.com/docs/mbed-os-api-reference/en/latest/APIs/communication/network_sockets/) should work.
Test Result
Diff: source/main.cpp
- Revision:
- 0:41f820ea137a
- Child:
- 2:c8eff436549f
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/source/main.cpp Mon Jul 31 15:41:22 2017 +0200
@@ -0,0 +1,63 @@
+#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);
+}