Morgan Du / Mbed OS http-webserver-example

Webserver example for Nuvoton NuMaker boards and mbed OS 5.15 - HTTP 1.1 and multi-threaded.

Dependencies:   mbed-http

For Mbed OS 6, please use the NuMaker-simple-httpd example.

This application demonstrates how to run an HTTP server on an mbed OS 5 device. It is derived from http-webserver-example Request parsing is done through nodejs/http-parser.

Fixed for Mbed OS 5.15 or later

Tested on

NuMaker IoT-M487 with Ethernet NuMaker PFM-M487 with Ethernet

source/http_server.h@0:41f820ea137a, 2017-07-31 (annotated)

Committer:
Jan Jongboom
Date:
Mon Jul 31 15:41:22 2017 +0200
Revision:
0:41f820ea137a
Child:
1:fe3df398bdf5
Initial release

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Jan Jongboom 0:41f820ea137a 1 /*
Jan Jongboom 0:41f820ea137a 2 * PackageLicenseDeclared: Apache-2.0
Jan Jongboom 0:41f820ea137a 3 * Copyright (c) 2017 ARM Limited
Jan Jongboom 0:41f820ea137a 4 *
Jan Jongboom 0:41f820ea137a 5 * Licensed under the Apache License, Version 2.0 (the "License");
Jan Jongboom 0:41f820ea137a 6 * you may not use this file except in compliance with the License.
Jan Jongboom 0:41f820ea137a 7 * You may obtain a copy of the License at
Jan Jongboom 0:41f820ea137a 8 *
Jan Jongboom 0:41f820ea137a 9 * http://www.apache.org/licenses/LICENSE-2.0
Jan Jongboom 0:41f820ea137a 10 *
Jan Jongboom 0:41f820ea137a 11 * Unless required by applicable law or agreed to in writing, software
Jan Jongboom 0:41f820ea137a 12 * distributed under the License is distributed on an "AS IS" BASIS,
Jan Jongboom 0:41f820ea137a 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
Jan Jongboom 0:41f820ea137a 14 * See the License for the specific language governing permissions and
Jan Jongboom 0:41f820ea137a 15 * limitations under the License.
Jan Jongboom 0:41f820ea137a 16 */
Jan Jongboom 0:41f820ea137a 17
Jan Jongboom 0:41f820ea137a 18 #ifndef _HTTP_SERVER_
Jan Jongboom 0:41f820ea137a 19 #define _HTTP_SERVER_
Jan Jongboom 0:41f820ea137a 20
Jan Jongboom 0:41f820ea137a 21 #include "mbed.h"
Jan Jongboom 0:41f820ea137a 22 #include "http_request_parser.h"
Jan Jongboom 0:41f820ea137a 23 #include "http_response.h"
Jan Jongboom 0:41f820ea137a 24 #include "http_response_builder.h"
Jan Jongboom 0:41f820ea137a 25
Jan Jongboom 0:41f820ea137a 26 #define HTTP_SERVER_MAX_CONCURRENT 5
Jan Jongboom 0:41f820ea137a 27
Jan Jongboom 0:41f820ea137a 28 typedef HttpResponse ParsedHttpRequest;
Jan Jongboom 0:41f820ea137a 29
Jan Jongboom 0:41f820ea137a 30 /**
Jan Jongboom 0:41f820ea137a 31 * \brief HttpServer implements the logic for setting up an HTTP server.
Jan Jongboom 0:41f820ea137a 32 */
Jan Jongboom 0:41f820ea137a 33 class HttpServer {
Jan Jongboom 0:41f820ea137a 34 public:
Jan Jongboom 0:41f820ea137a 35 /**
Jan Jongboom 0:41f820ea137a 36 * HttpRequest Constructor
Jan Jongboom 0:41f820ea137a 37 *
Jan Jongboom 0:41f820ea137a 38 * @param[in] network The network interface
Jan Jongboom 0:41f820ea137a 39 */
Jan Jongboom 0:41f820ea137a 40 HttpServer(NetworkInterface* network) : server(network) {
Jan Jongboom 0:41f820ea137a 41
Jan Jongboom 0:41f820ea137a 42 }
Jan Jongboom 0:41f820ea137a 43
Jan Jongboom 0:41f820ea137a 44 ~HttpServer() {
Jan Jongboom 0:41f820ea137a 45 for (size_t ix = 0; ix < HTTP_SERVER_MAX_CONCURRENT; ix++) {
Jan Jongboom 0:41f820ea137a 46 if (socket_threads[ix]) {
Jan Jongboom 0:41f820ea137a 47 delete socket_threads[ix];
Jan Jongboom 0:41f820ea137a 48 }
Jan Jongboom 0:41f820ea137a 49 }
Jan Jongboom 0:41f820ea137a 50 }
Jan Jongboom 0:41f820ea137a 51
Jan Jongboom 0:41f820ea137a 52 /**
Jan Jongboom 0:41f820ea137a 53 * Start listening
Jan Jongboom 0:41f820ea137a 54 *
Jan Jongboom 0:41f820ea137a 55 * @param[in] port The port to listen on
Jan Jongboom 0:41f820ea137a 56 */
Jan Jongboom 0:41f820ea137a 57 nsapi_error_t bind(uint16_t port) {
Jan Jongboom 0:41f820ea137a 58 server.listen(HTTP_SERVER_MAX_CONCURRENT); // max. concurrent connections...
Jan Jongboom 0:41f820ea137a 59 return server.bind(port);
Jan Jongboom 0:41f820ea137a 60 }
Jan Jongboom 0:41f820ea137a 61
Jan Jongboom 0:41f820ea137a 62 /**
Jan Jongboom 0:41f820ea137a 63 * Start running the server (it will run on it's own thread)
Jan Jongboom 0:41f820ea137a 64 */
Jan Jongboom 0:41f820ea137a 65 nsapi_error_t start(uint16_t port, Callback<void(ParsedHttpRequest* request, TCPSocket* socket)> a_handler) {
Jan Jongboom 0:41f820ea137a 66 server.listen(HTTP_SERVER_MAX_CONCURRENT); // max. concurrent connections...
Jan Jongboom 0:41f820ea137a 67
Jan Jongboom 0:41f820ea137a 68 nsapi_error_t ret = server.bind(port);
Jan Jongboom 0:41f820ea137a 69 if (ret != NSAPI_ERROR_OK) {
Jan Jongboom 0:41f820ea137a 70 return ret;
Jan Jongboom 0:41f820ea137a 71 }
Jan Jongboom 0:41f820ea137a 72
Jan Jongboom 0:41f820ea137a 73 handler = a_handler;
Jan Jongboom 0:41f820ea137a 74
Jan Jongboom 0:41f820ea137a 75 main_thread.start(callback(this, &HttpServer::main));
Jan Jongboom 0:41f820ea137a 76
Jan Jongboom 0:41f820ea137a 77 return NSAPI_ERROR_OK;
Jan Jongboom 0:41f820ea137a 78 }
Jan Jongboom 0:41f820ea137a 79
Jan Jongboom 0:41f820ea137a 80 private:
Jan Jongboom 0:41f820ea137a 81
Jan Jongboom 0:41f820ea137a 82 void receive_data() {
Jan Jongboom 0:41f820ea137a 83 // UNSAFE: should Mutex around it or something
Jan Jongboom 0:41f820ea137a 84 TCPSocket* socket = sockets.back();
Jan Jongboom 0:41f820ea137a 85
Jan Jongboom 0:41f820ea137a 86 // needs to keep running until the socket gets closed
Jan Jongboom 0:41f820ea137a 87 while (1) {
Jan Jongboom 0:41f820ea137a 88
Jan Jongboom 0:41f820ea137a 89 ParsedHttpRequest* response = new ParsedHttpRequest();
Jan Jongboom 0:41f820ea137a 90 HttpParser* parser = new HttpParser(response, HTTP_REQUEST);
Jan Jongboom 0:41f820ea137a 91
Jan Jongboom 0:41f820ea137a 92 // Set up a receive buffer (on the heap)
Jan Jongboom 0:41f820ea137a 93 uint8_t* recv_buffer = (uint8_t*)malloc(HTTP_RECEIVE_BUFFER_SIZE);
Jan Jongboom 0:41f820ea137a 94
Jan Jongboom 0:41f820ea137a 95 // TCPSocket::recv is called until we don't have any data anymore
Jan Jongboom 0:41f820ea137a 96 nsapi_size_or_error_t recv_ret;
Jan Jongboom 0:41f820ea137a 97 while ((recv_ret = socket->recv(recv_buffer, HTTP_RECEIVE_BUFFER_SIZE)) > 0) {
Jan Jongboom 0:41f820ea137a 98 // Pass the chunk into the http_parser
Jan Jongboom 0:41f820ea137a 99 size_t nparsed = parser->execute((const char*)recv_buffer, recv_ret);
Jan Jongboom 0:41f820ea137a 100 if (nparsed != recv_ret) {
Jan Jongboom 0:41f820ea137a 101 printf("Parsing failed... parsed %d bytes, received %d bytes\n", nparsed, recv_ret);
Jan Jongboom 0:41f820ea137a 102 recv_ret = -2101;
Jan Jongboom 0:41f820ea137a 103 break;
Jan Jongboom 0:41f820ea137a 104 }
Jan Jongboom 0:41f820ea137a 105
Jan Jongboom 0:41f820ea137a 106 if (response->is_message_complete()) {
Jan Jongboom 0:41f820ea137a 107 break;
Jan Jongboom 0:41f820ea137a 108 }
Jan Jongboom 0:41f820ea137a 109 }
Jan Jongboom 0:41f820ea137a 110 // error?
Jan Jongboom 0:41f820ea137a 111 if (recv_ret < 0) {
Jan Jongboom 0:41f820ea137a 112 printf("Error reading from socket %d\n", recv_ret);
Jan Jongboom 0:41f820ea137a 113
Jan Jongboom 0:41f820ea137a 114 // error = recv_ret;
Jan Jongboom 0:41f820ea137a 115 delete response;
Jan Jongboom 0:41f820ea137a 116 delete parser;
Jan Jongboom 0:41f820ea137a 117 free(recv_buffer);
Jan Jongboom 0:41f820ea137a 118
Jan Jongboom 0:41f820ea137a 119 // q; should we always break out of the thread or only if NO_SOCKET ?
Jan Jongboom 0:41f820ea137a 120 // should we delete socket here? the socket seems already gone...
Jan Jongboom 0:41f820ea137a 121 if (recv_ret < -3000) {
Jan Jongboom 0:41f820ea137a 122 return;
Jan Jongboom 0:41f820ea137a 123 }
Jan Jongboom 0:41f820ea137a 124 else {
Jan Jongboom 0:41f820ea137a 125 continue;
Jan Jongboom 0:41f820ea137a 126 }
Jan Jongboom 0:41f820ea137a 127 }
Jan Jongboom 0:41f820ea137a 128
Jan Jongboom 0:41f820ea137a 129 // When done, call parser.finish()
Jan Jongboom 0:41f820ea137a 130 parser->finish();
Jan Jongboom 0:41f820ea137a 131
Jan Jongboom 0:41f820ea137a 132 // Free the receive buffer
Jan Jongboom 0:41f820ea137a 133 free(recv_buffer);
Jan Jongboom 0:41f820ea137a 134
Jan Jongboom 0:41f820ea137a 135 // Let user application handle the request, if user needs a handle to response they need to memcpy themselves
Jan Jongboom 0:41f820ea137a 136 handler(response, socket);
Jan Jongboom 0:41f820ea137a 137
Jan Jongboom 0:41f820ea137a 138 // Free the response and parser
Jan Jongboom 0:41f820ea137a 139 delete response;
Jan Jongboom 0:41f820ea137a 140 delete parser;
Jan Jongboom 0:41f820ea137a 141 }
Jan Jongboom 0:41f820ea137a 142 }
Jan Jongboom 0:41f820ea137a 143
Jan Jongboom 0:41f820ea137a 144 void main() {
Jan Jongboom 0:41f820ea137a 145 while (1) {
Jan Jongboom 0:41f820ea137a 146 TCPSocket* clt_sock = new TCPSocket(); // Q: when should these be cleared? When not connected anymore?
Jan Jongboom 0:41f820ea137a 147 SocketAddress clt_addr;
Jan Jongboom 0:41f820ea137a 148
Jan Jongboom 0:41f820ea137a 149 nsapi_error_t accept_res = server.accept(clt_sock, &clt_addr);
Jan Jongboom 0:41f820ea137a 150 if (accept_res == NSAPI_ERROR_OK) {
Jan Jongboom 0:41f820ea137a 151 sockets.push_back(clt_sock); // so we can clear our disconnected sockets
Jan Jongboom 0:41f820ea137a 152
Jan Jongboom 0:41f820ea137a 153 // and start listening for events there
Jan Jongboom 0:41f820ea137a 154 Thread* t = new Thread(osPriorityNormal, 2048);
Jan Jongboom 0:41f820ea137a 155 t->start(callback(this, &HttpServer::receive_data));
Jan Jongboom 0:41f820ea137a 156
Jan Jongboom 0:41f820ea137a 157 socket_threads.push_back(t);
Jan Jongboom 0:41f820ea137a 158 }
Jan Jongboom 0:41f820ea137a 159
Jan Jongboom 0:41f820ea137a 160 for (size_t ix = 0; ix < socket_threads.size(); ix++) {
Jan Jongboom 0:41f820ea137a 161 if (socket_threads[ix]->get_state() == Thread::Deleted) {
Jan Jongboom 0:41f820ea137a 162 delete socket_threads[ix];
Jan Jongboom 0:41f820ea137a 163 socket_threads.erase(socket_threads.begin() + ix); // what if there are two?
Jan Jongboom 0:41f820ea137a 164 }
Jan Jongboom 0:41f820ea137a 165 }
Jan Jongboom 0:41f820ea137a 166
Jan Jongboom 0:41f820ea137a 167 }
Jan Jongboom 0:41f820ea137a 168 }
Jan Jongboom 0:41f820ea137a 169
Jan Jongboom 0:41f820ea137a 170 TCPServer server;
Jan Jongboom 0:41f820ea137a 171 Thread main_thread;
Jan Jongboom 0:41f820ea137a 172 vector<TCPSocket*> sockets;
Jan Jongboom 0:41f820ea137a 173 vector<Thread*> socket_threads;
Jan Jongboom 0:41f820ea137a 174 Callback<void(ParsedHttpRequest* request, TCPSocket* socket)> handler = 0;
Jan Jongboom 0:41f820ea137a 175 };
Jan Jongboom 0:41f820ea137a 176
Jan Jongboom 0:41f820ea137a 177 #endif // _HTTP_SERVER