sandbox
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.jsonand change thenetwork-interfaceoption 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.
Revision 1:fe3df398bdf5, committed 2017-07-31
- Comitter:
- Jan Jongboom
- Date:
- Mon Jul 31 17:12:21 2017 +0200
- Parent:
- 0:41f820ea137a
- Commit message:
- Compatibility with LwIP. Fix memory leaks.
Changed in this revision
diff -r 41f820ea137a -r fe3df398bdf5 .gitignore --- a/.gitignore Mon Jul 31 15:41:22 2017 +0200 +++ b/.gitignore Mon Jul 31 17:12:21 2017 +0200 @@ -1,4 +1,9 @@ .mbed BUILD/ mbed_settings.* +.hgignore +.hg/ +mbed_config.h +Makefile +mbed-memory-status.lib
diff -r 41f820ea137a -r fe3df398bdf5 .hgignore --- a/.hgignore Mon Jul 31 15:41:22 2017 +0200 +++ b/.hgignore Mon Jul 31 17:12:21 2017 +0200 @@ -6,3 +6,8 @@ easy-connect/ mbed-http/ .git/ +Makefile +mbed-memory-status/ +mbed-memory-status.lib +mbed_config. +
diff -r 41f820ea137a -r fe3df398bdf5 mbed_app.json
--- a/mbed_app.json Mon Jul 31 15:41:22 2017 +0200
+++ b/mbed_app.json Mon Jul 31 17:12:21 2017 +0200
@@ -2,7 +2,7 @@
"config": {
"network-interface": {
"help": "options are ETHERNET, WIFI_ESP8266, WIFI_ODIN, WIFI_RTW, MESH_LOWPAN_ND, MESH_THREAD",
- "value": "WIFI_ESP8266"
+ "value": "ETHERNET"
},
"mesh_radio_type": {
"help": "options are ATMEL, MCR20, SPIRIT1, EFR32",
diff -r 41f820ea137a -r fe3df398bdf5 source/http_response_builder.h
--- a/source/http_response_builder.h Mon Jul 31 15:41:22 2017 +0200
+++ b/source/http_response_builder.h Mon Jul 31 17:12:21 2017 +0200
@@ -169,7 +169,11 @@
size_t res_size;
char* response = build(body, body_size, &res_size);
- return socket->send(response, res_size);
+ nsapi_error_t r = socket->send(response, res_size);
+
+ free(response);
+
+ return r;
}
private:
diff -r 41f820ea137a -r fe3df398bdf5 source/http_server.h
--- a/source/http_server.h Mon Jul 31 15:41:22 2017 +0200
+++ b/source/http_server.h Mon Jul 31 17:12:21 2017 +0200
@@ -23,7 +23,9 @@
#include "http_response.h"
#include "http_response_builder.h"
+#ifndef HTTP_SERVER_MAX_CONCURRENT
#define HTTP_SERVER_MAX_CONCURRENT 5
+#endif
typedef HttpResponse ParsedHttpRequest;
@@ -37,8 +39,8 @@
*
* @param[in] network The network interface
*/
- HttpServer(NetworkInterface* network) : server(network) {
-
+ HttpServer(NetworkInterface* network) {
+ _network = network;
}
~HttpServer() {
@@ -50,26 +52,25 @@
}
/**
- * Start listening
- *
- * @param[in] port The port to listen on
- */
- nsapi_error_t bind(uint16_t port) {
- server.listen(HTTP_SERVER_MAX_CONCURRENT); // max. concurrent connections...
- return server.bind(port);
- }
-
- /**
* Start running the server (it will run on it's own thread)
*/
nsapi_error_t start(uint16_t port, Callback<void(ParsedHttpRequest* request, TCPSocket* socket)> a_handler) {
- server.listen(HTTP_SERVER_MAX_CONCURRENT); // max. concurrent connections...
+ server = new TCPServer();
- nsapi_error_t ret = server.bind(port);
+ nsapi_error_t ret;
+
+ ret = server->open(_network);
if (ret != NSAPI_ERROR_OK) {
return ret;
}
+ ret = server->bind(port);
+ if (ret != NSAPI_ERROR_OK) {
+ return ret;
+ }
+
+ server->listen(HTTP_SERVER_MAX_CONCURRENT); // max. concurrent connections...
+
handler = a_handler;
main_thread.start(callback(this, &HttpServer::main));
@@ -108,8 +109,10 @@
}
}
// error?
- if (recv_ret < 0) {
- printf("Error reading from socket %d\n", recv_ret);
+ if (recv_ret <= 0) {
+ if (recv_ret < 0) {
+ printf("Error reading from socket %d\n", recv_ret);
+ }
// error = recv_ret;
delete response;
@@ -118,7 +121,7 @@
// q; should we always break out of the thread or only if NO_SOCKET ?
// should we delete socket here? the socket seems already gone...
- if (recv_ret < -3000) {
+ if (recv_ret < -3000 || recv_ret == 0) {
return;
}
else {
@@ -133,7 +136,9 @@
free(recv_buffer);
// Let user application handle the request, if user needs a handle to response they need to memcpy themselves
- handler(response, socket);
+ if (recv_ret > 0) {
+ handler(response, socket);
+ }
// Free the response and parser
delete response;
@@ -146,7 +151,7 @@
TCPSocket* clt_sock = new TCPSocket(); // Q: when should these be cleared? When not connected anymore?
SocketAddress clt_addr;
- nsapi_error_t accept_res = server.accept(clt_sock, &clt_addr);
+ nsapi_error_t accept_res = server->accept(clt_sock, &clt_addr);
if (accept_res == NSAPI_ERROR_OK) {
sockets.push_back(clt_sock); // so we can clear our disconnected sockets
@@ -154,12 +159,20 @@
Thread* t = new Thread(osPriorityNormal, 2048);
t->start(callback(this, &HttpServer::receive_data));
- socket_threads.push_back(t);
+ socket_thread_metadata_t* m = new socket_thread_metadata_t();
+ m->socket = clt_sock;
+ m->thread = t;
+ socket_threads.push_back(m);
+ }
+ else {
+ delete clt_sock;
}
for (size_t ix = 0; ix < socket_threads.size(); ix++) {
- if (socket_threads[ix]->get_state() == Thread::Deleted) {
- delete socket_threads[ix];
+ if (socket_threads[ix]->thread->get_state() == Thread::Deleted) {
+ socket_threads[ix]->thread->terminate();
+ delete socket_threads[ix]->thread;
+ delete socket_threads[ix]->socket; // does this work on esp8266?
socket_threads.erase(socket_threads.begin() + ix); // what if there are two?
}
}
@@ -167,11 +180,17 @@
}
}
- TCPServer server;
+ typedef struct {
+ TCPSocket* socket;
+ Thread* thread;
+ } socket_thread_metadata_t;
+
+ TCPServer* server;
+ NetworkInterface* _network;
Thread main_thread;
vector<TCPSocket*> sockets;
- vector<Thread*> socket_threads;
- Callback<void(ParsedHttpRequest* request, TCPSocket* socket)> handler = 0;
+ vector<socket_thread_metadata_t*> socket_threads;
+ Callback<void(ParsedHttpRequest* request, TCPSocket* socket)> handler;
};
#endif // _HTTP_SERVER