Jack Hansdampf / Mbed OS WebSwitch_ENC28J60_GSOE

Important changes to repositories hosted on mbed.com

Mbed hosted mercurial repositories are deprecated and are due to be permanently deleted in July 2026.

To keep a copy of this software download the repository Zip archive or clone locally using Mercurial.

It is also possible to export all your personal repositories from the account settings page.

Dependencies:   UIPEthernet_GSOE

main.cpp@15:9beb9b99695d, 2020-06-05 (annotated)

Committer:
hudakz
Date:
Fri Jun 05 15:15:01 2020 +0000
Revision:
15:9beb9b99695d
Parent:
14:810ac368dd6e
Child:
18:02264a85fdda
Tiny HTTP server to remotely turn a DigitalOut on/off.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
hudakz 10:b47c7921346f 1 #include "mbed.h"
hudakz 0:68a0003c4cb8 2 #include <string>
hudakz 10:b47c7921346f 3 #include "UipEthernet.h"
hudakz 10:b47c7921346f 4 #include "TcpServer.h"
hudakz 10:b47c7921346f 5 #include "TcpClient.h"
hudakz 0:68a0003c4cb8 6
hudakz 11:6c0b20227ca2 7 //#define DEBUG
hudakz 14:810ac368dd6e 8 // Static IP address must be unique and compatible with your network.
hudakz 10:b47c7921346f 9 #define IP "192.168.1.35"
hudakz 10:b47c7921346f 10 #define GATEWAY "192.168.1.1"
hudakz 10:b47c7921346f 11 #define NETMASK "255.255.255.0"
hudakz 10:b47c7921346f 12 #define PORT 80
hudakz 11:6c0b20227ca2 13 const uint8_t MAC[6] = { 0x00, 0x01, 0x02, 0x03, 0x04, 0x06 };
hudakz 11:6c0b20227ca2 14 UipEthernet net(MAC, D11, D12, D13, D10); // mosi, miso, sck, cs
hudakz 12:7c46dcf6f7e2 15 TcpServer server; // Ethernet server
hudakz 11:6c0b20227ca2 16 TcpClient* client;
hudakz 15:9beb9b99695d 17 char httpBuf[1500];
hudakz 15:9beb9b99695d 18 char httpHeader[256];
hudakz 10:b47c7921346f 19 const int OFF = 0;
hudakz 10:b47c7921346f 20 const int ON = 1;
hudakz 11:6c0b20227ca2 21 DigitalOut output(D3); // A digital output to be switched on/off
hudakz 15:9beb9b99695d 22 float roomTemp = 21.8f; // A temperature sensor output
hudakz 15:9beb9b99695d 23 const char PASSWORD[] = "secret"; // Change as you like
hudakz 0:68a0003c4cb8 24
hudakz 10:b47c7921346f 25 /**
hudakz 10:b47c7921346f 26 * @brief Analyses the received URL
hudakz 10:b47c7921346f 27 * @note The string passed to this function will look like this:
hudakz 10:b47c7921346f 28 * GET /HTTP/1.....
hudakz 10:b47c7921346f 29 * GET /password HTTP/1.....
hudakz 10:b47c7921346f 30 * GET /password/ HTTP/1.....
hudakz 10:b47c7921346f 31 * GET /password/?sw=1 HTTP/1.....
hudakz 10:b47c7921346f 32 * GET /password/?sw=0 HTTP/1.....
hudakz 10:b47c7921346f 33 * @param url URL string
hudakz 10:b47c7921346f 34 * @retval -3 just refresh page
hudakz 10:b47c7921346f 35 * -2 no command given but password valid
hudakz 10:b47c7921346f 36 * -1 invalid password
hudakz 10:b47c7921346f 37 * 0 switch off
hudakz 10:b47c7921346f 38 * 1 switch on
hudakz 10:b47c7921346f 39 */
hudakz 15:9beb9b99695d 40 int8_t analyseURL(char* url)
hudakz 10:b47c7921346f 41 {
hudakz 15:9beb9b99695d 42 if (strlen(url) < (5 + strlen(PASSWORD) + 1))
hudakz 10:b47c7921346f 43 return(-1);
hudakz 0:68a0003c4cb8 44
hudakz 15:9beb9b99695d 45 //if (url.substr(5, PASSWORD.size()) != PASSWORD)
hudakz 15:9beb9b99695d 46 if (strncmp(url + 5, PASSWORD, strlen(PASSWORD)) != 0)
hudakz 0:68a0003c4cb8 47 return(-1);
hudakz 0:68a0003c4cb8 48
hudakz 15:9beb9b99695d 49 uint8_t pos = 5 + strlen(PASSWORD);
hudakz 0:68a0003c4cb8 50
hudakz 15:9beb9b99695d 51 //if (url.substr(pos, 1) != "/")
hudakz 15:9beb9b99695d 52
hudakz 15:9beb9b99695d 53 if (*(url + pos) != '/')
hudakz 0:68a0003c4cb8 54 return(-1);
hudakz 0:68a0003c4cb8 55
hudakz 15:9beb9b99695d 56 //if (url.substr(pos++, 1) == " ")
hudakz 15:9beb9b99695d 57 if (*(url + pos++) == ' ')
hudakz 10:b47c7921346f 58 return(-2);
hudakz 0:68a0003c4cb8 59
hudakz 15:9beb9b99695d 60 //string cmd(url.substr(pos, 5));
hudakz 15:9beb9b99695d 61 *(url + pos + 5) = '\0'; // terminate the cmd string
hudakz 15:9beb9b99695d 62 char* cmd = ((url + pos));
hudakz 15:9beb9b99695d 63 if (strcmp(cmd, "?sw=0") == 0)
hudakz 0:68a0003c4cb8 64 return(0);
hudakz 15:9beb9b99695d 65 if (strcmp(cmd, "?sw=1") == 0)
hudakz 0:68a0003c4cb8 66 return(1);
hudakz 0:68a0003c4cb8 67 return(-3);
hudakz 0:68a0003c4cb8 68 }
hudakz 0:68a0003c4cb8 69
hudakz 5:0ab8292e37da 70 /**
hudakz 5:0ab8292e37da 71 * @brief
hudakz 5:0ab8292e37da 72 * @note
hudakz 5:0ab8292e37da 73 * @param
hudakz 5:0ab8292e37da 74 * @retval
hudakz 5:0ab8292e37da 75 */
hudakz 15:9beb9b99695d 76 char* movedPermanently(uint8_t flag)
hudakz 10:b47c7921346f 77 {
hudakz 15:9beb9b99695d 78 memset(httpBuf, 0, sizeof(httpBuf));
hudakz 15:9beb9b99695d 79 if (flag == 1) {
hudakz 15:9beb9b99695d 80 strcpy(httpBuf, "/");
hudakz 15:9beb9b99695d 81 strcat(httpBuf, PASSWORD);
hudakz 15:9beb9b99695d 82 strcat(httpBuf, "/");
hudakz 15:9beb9b99695d 83 }
hudakz 0:68a0003c4cb8 84
hudakz 15:9beb9b99695d 85 strcat(httpBuf, "<h1>301 Moved Permanently</h1>\r\n");
hudakz 15:9beb9b99695d 86 return(httpBuf);
hudakz 0:68a0003c4cb8 87 }
hudakz 0:68a0003c4cb8 88
hudakz 5:0ab8292e37da 89 /**
hudakz 5:0ab8292e37da 90 * @brief
hudakz 5:0ab8292e37da 91 * @note
hudakz 5:0ab8292e37da 92 * @param
hudakz 5:0ab8292e37da 93 * @retval
hudakz 5:0ab8292e37da 94 */
hudakz 15:9beb9b99695d 95 char* showWebPage(int status)
hudakz 10:b47c7921346f 96 {
hudakz 15:9beb9b99695d 97 char roomTempStr[10] = { };
hudakz 10:b47c7921346f 98
hudakz 10:b47c7921346f 99 //roomTemp = ds1820.read();
hudakz 15:9beb9b99695d 100
hudakz 10:b47c7921346f 101 sprintf(roomTempStr, "%3.1f", roomTemp);
hudakz 15:9beb9b99695d 102 memset(httpBuf, 0, sizeof(httpBuf));
hudakz 10:b47c7921346f 103 /*$off*/
hudakz 15:9beb9b99695d 104 strcat
hudakz 15:9beb9b99695d 105 (
hudakz 15:9beb9b99695d 106 httpBuf,
hudakz 10:b47c7921346f 107 "<head>"
hudakz 15:9beb9b99695d 108 "<meta charset=\"utf-8\">"
hudakz 15:9beb9b99695d 109 "<meta name=\"viewport\" content=\" initial-scale=1.0; maximum-scale=1.0; minimum-scale=1.0; user-scalable=0;\"/>"
hudakz 15:9beb9b99695d 110 "<title>Smart Home</title>"
hudakz 15:9beb9b99695d 111 "<link href='http://fonts.googleapis.com/css?family=Droid+Sans&v1' rel='stylesheet' type='text/css'>"
hudakz 15:9beb9b99695d 112 "<style>"
hudakz 15:9beb9b99695d 113 ".switch {"
hudakz 15:9beb9b99695d 114 "position: relative;"
hudakz 15:9beb9b99695d 115 "display: inline-block;"
hudakz 15:9beb9b99695d 116 "width: 60px;"
hudakz 15:9beb9b99695d 117 "height: 34px;"
hudakz 15:9beb9b99695d 118 "}"
hudakz 15:9beb9b99695d 119 ".switch input {display:none;}"
hudakz 15:9beb9b99695d 120 ".slider {"
hudakz 15:9beb9b99695d 121 "position: absolute;"
hudakz 15:9beb9b99695d 122 "cursor: pointer;"
hudakz 15:9beb9b99695d 123 "top: 0;"
hudakz 15:9beb9b99695d 124 "left: 0;"
hudakz 15:9beb9b99695d 125 "right: 0;"
hudakz 15:9beb9b99695d 126 "bottom: 0;"
hudakz 15:9beb9b99695d 127 "border-radius: 34px;"
hudakz 15:9beb9b99695d 128 "background-color: #ccc;"
hudakz 15:9beb9b99695d 129 "-webkit-transition: .4s;"
hudakz 15:9beb9b99695d 130 "transition: .4s;"
hudakz 15:9beb9b99695d 131 "}"
hudakz 15:9beb9b99695d 132 ".slider:before {"
hudakz 15:9beb9b99695d 133 "position: absolute;"
hudakz 15:9beb9b99695d 134 "content: \"\";"
hudakz 15:9beb9b99695d 135 "height: 26px;"
hudakz 15:9beb9b99695d 136 "width: 26px;"
hudakz 15:9beb9b99695d 137 "left: 4px;"
hudakz 15:9beb9b99695d 138 "bottom: 4px;"
hudakz 15:9beb9b99695d 139 "border-radius: 50%;"
hudakz 15:9beb9b99695d 140 "background-color: white;"
hudakz 15:9beb9b99695d 141 "-webkit-transition: .4s;"
hudakz 15:9beb9b99695d 142 "transition: .4s;"
hudakz 15:9beb9b99695d 143 "}"
hudakz 15:9beb9b99695d 144 "input:checked + .slider {"
hudakz 15:9beb9b99695d 145 "background-color: #8ce196;"
hudakz 15:9beb9b99695d 146 "}"
hudakz 15:9beb9b99695d 147 "input:focus + .slider {"
hudakz 15:9beb9b99695d 148 "box-shadow: 0 0 1px #8ce196;"
hudakz 15:9beb9b99695d 149 "}"
hudakz 15:9beb9b99695d 150 "input:checked + .slider:before {"
hudakz 15:9beb9b99695d 151 "-webkit-transform: translateX(26px);"
hudakz 15:9beb9b99695d 152 "-ms-transform: translateX(26px);"
hudakz 15:9beb9b99695d 153 "transform: translateX(26px);"
hudakz 15:9beb9b99695d 154 "}"
hudakz 15:9beb9b99695d 155 "</style>"
hudakz 10:b47c7921346f 156 "</head>"
hudakz 10:b47c7921346f 157
hudakz 10:b47c7921346f 158 "<body>"
hudakz 15:9beb9b99695d 159 "<h2><a href=\".\" title=\"Click to refresh the page\">Smart Home</a></h2>"
hudakz 15:9beb9b99695d 160 "<pre>Temperature:\t"
hudakz 15:9beb9b99695d 161 );
hudakz 15:9beb9b99695d 162 strcat(httpBuf, roomTempStr);
hudakz 15:9beb9b99695d 163 strcat(httpBuf, "&deg;C</pre>");
hudakz 15:9beb9b99695d 164 strcat
hudakz 15:9beb9b99695d 165 (
hudakz 15:9beb9b99695d 166 httpBuf,
hudakz 15:9beb9b99695d 167 "<pre>Heating:\t"
hudakz 15:9beb9b99695d 168 );
hudakz 10:b47c7921346f 169 if(status == ON) {
hudakz 15:9beb9b99695d 170 strcat
hudakz 15:9beb9b99695d 171 (
hudakz 15:9beb9b99695d 172 httpBuf,
hudakz 15:9beb9b99695d 173 "<a href=\"./?sw=0\" class=\"switch\"> "
hudakz 15:9beb9b99695d 174 "<input type=\"checkbox\" checked>"
hudakz 15:9beb9b99695d 175 );
hudakz 5:0ab8292e37da 176 }
hudakz 5:0ab8292e37da 177 else {
hudakz 15:9beb9b99695d 178 strcat
hudakz 15:9beb9b99695d 179 (
hudakz 15:9beb9b99695d 180 httpBuf,
hudakz 15:9beb9b99695d 181 "<a href=\"./?sw=1\" class=\"switch\"> "
hudakz 15:9beb9b99695d 182 "<input type=\"checkbox\">"
hudakz 15:9beb9b99695d 183 );
hudakz 0:68a0003c4cb8 184 }
hudakz 15:9beb9b99695d 185 strcat
hudakz 15:9beb9b99695d 186 (
hudakz 15:9beb9b99695d 187 httpBuf,
hudakz 15:9beb9b99695d 188 "<div class=\"slider\"></div>"
hudakz 15:9beb9b99695d 189 "</a>"
hudakz 15:9beb9b99695d 190 "</pre>"
hudakz 15:9beb9b99695d 191 "<hr>"
hudakz 15:9beb9b99695d 192 "<pre>2017 ARMmbed</pre>"
hudakz 15:9beb9b99695d 193 "</body>"
hudakz 15:9beb9b99695d 194 );
hudakz 10:b47c7921346f 195 /*$on*/
hudakz 15:9beb9b99695d 196 return httpBuf;
hudakz 0:68a0003c4cb8 197 }
hudakz 0:68a0003c4cb8 198
hudakz 5:0ab8292e37da 199 /**
hudakz 5:0ab8292e37da 200 * @brief
hudakz 5:0ab8292e37da 201 * @note
hudakz 5:0ab8292e37da 202 * @param
hudakz 5:0ab8292e37da 203 * @retval
hudakz 5:0ab8292e37da 204 */
hudakz 15:9beb9b99695d 205 void sendHTTP(TcpClient* client, char* header, char* content)
hudakz 10:b47c7921346f 206 {
hudakz 15:9beb9b99695d 207 char content_length[10] = { };
hudakz 15:9beb9b99695d 208
hudakz 15:9beb9b99695d 209 sprintf(content_length, "%u\r\n", strlen(content));
hudakz 10:b47c7921346f 210
hudakz 15:9beb9b99695d 211 strcat(header, "\r\nContent-Type: text/html\r\n");
hudakz 15:9beb9b99695d 212 strcat(header, "Content-Length: ");
hudakz 15:9beb9b99695d 213 strcat(header, content_length);
hudakz 15:9beb9b99695d 214 strcat(header, "Pragma: no-cache\r\n");
hudakz 15:9beb9b99695d 215 strcat(header, "Connection: About to close\r\n\r\n");
hudakz 10:b47c7921346f 216
hudakz 15:9beb9b99695d 217 char c = content[0];
hudakz 15:9beb9b99695d 218 memmove(httpBuf + strlen(header), httpBuf, strlen(content)); // make room for the header
hudakz 15:9beb9b99695d 219 strcpy(httpBuf, header); // copy the header on front of the content
hudakz 15:9beb9b99695d 220 httpBuf[strlen(header)] = c;
hudakz 15:9beb9b99695d 221 client->send((uint8_t*)httpBuf, strlen(httpBuf));
hudakz 10:b47c7921346f 222 }
hudakz 10:b47c7921346f 223
hudakz 10:b47c7921346f 224 /**
hudakz 10:b47c7921346f 225 * @brief
hudakz 10:b47c7921346f 226 * @note
hudakz 10:b47c7921346f 227 * @param
hudakz 10:b47c7921346f 228 * @retval
hudakz 10:b47c7921346f 229 */
hudakz 10:b47c7921346f 230 int main(void)
hudakz 10:b47c7921346f 231 {
hudakz 10:b47c7921346f 232 printf("Starting ...\r\n");
hudakz 10:b47c7921346f 233
hudakz 12:7c46dcf6f7e2 234 //net.set_network(IP, NETMASK, GATEWAY); // include this for using static IP address
hudakz 15:9beb9b99695d 235 if (net.connect(30) != 0) {
hudakz 15:9beb9b99695d 236
hudakz 15:9beb9b99695d 237 // 'connect' timeout in seconds (defaults to 60 sec)
hudakz 14:810ac368dd6e 238 printf("Unable to connet.\r\n");
hudakz 14:810ac368dd6e 239 return -1;
hudakz 14:810ac368dd6e 240 }
hudakz 10:b47c7921346f 241
hudakz 10:b47c7921346f 242 // Show the network address
hudakz 15:9beb9b99695d 243 SocketAddress addr;
hudakz 15:9beb9b99695d 244 net.get_ip_address(&addr);
hudakz 15:9beb9b99695d 245 printf("IP address: %s\n", addr.get_ip_address() ? addr.get_ip_address() : "None");
hudakz 15:9beb9b99695d 246 net.get_netmask(&addr);
hudakz 15:9beb9b99695d 247 printf("Netmask: %s\n", addr.get_ip_address() ? addr.get_ip_address() : "None");
hudakz 15:9beb9b99695d 248 net.get_gateway(&addr);
hudakz 15:9beb9b99695d 249 printf("Gateway: %s\n", addr.get_ip_address() ? addr.get_ip_address() : "None");
hudakz 10:b47c7921346f 250
hudakz 10:b47c7921346f 251 /* Open the server on ethernet stack */
hudakz 10:b47c7921346f 252 server.open(&net);
hudakz 10:b47c7921346f 253
hudakz 10:b47c7921346f 254 /* Bind the HTTP port (TCP 80) to the server */
hudakz 10:b47c7921346f 255 server.bind(PORT);
hudakz 10:b47c7921346f 256
hudakz 14:810ac368dd6e 257 /* Can handle 4 simultaneous connections */
hudakz 14:810ac368dd6e 258 server.listen(4);
hudakz 10:b47c7921346f 259
hudakz 11:6c0b20227ca2 260 while (true) {
hudakz 10:b47c7921346f 261 client = server.accept();
hudakz 10:b47c7921346f 262 if (client) {
hudakz 15:9beb9b99695d 263 switch (client->recv((uint8_t*)httpBuf, client->available())) {
hudakz 15:9beb9b99695d 264 case 0:
hudakz 15:9beb9b99695d 265 printf("recieved buffer is empty.\n\r");
hudakz 11:6c0b20227ca2 266 break;
hudakz 0:68a0003c4cb8 267
hudakz 11:6c0b20227ca2 268 case -1:
hudakz 15:9beb9b99695d 269 printf("failed to read data from client.\n\r");
hudakz 11:6c0b20227ca2 270 break;
hudakz 0:68a0003c4cb8 271
hudakz 15:9beb9b99695d 272 default:
hudakz 15:9beb9b99695d 273 #ifdef DEBUG
hudakz 15:9beb9b99695d 274 printf("Client with IP address %s connected.\r\n\r\n", client->getpeername());
hudakz 15:9beb9b99695d 275 printf("Data received:\r\n%s\n\r", receiveBuf);
hudakz 15:9beb9b99695d 276 #endif
hudakz 15:9beb9b99695d 277 if (strncmp(httpBuf, "GET", 3) != 0) {
hudakz 15:9beb9b99695d 278 strcpy(httpHeader, "HTTP/1.0 200 OK");
hudakz 15:9beb9b99695d 279 strcpy(httpBuf, "<h1>200 OK</h1>");
hudakz 15:9beb9b99695d 280 sendHTTP(client, httpHeader, httpBuf);
hudakz 15:9beb9b99695d 281 }
hudakz 15:9beb9b99695d 282 else
hudakz 15:9beb9b99695d 283 if ((strncmp(httpBuf, "GET", 3) == 0) && (strncmp(httpBuf + 3, " / ", 3 == 0))) {
hudakz 15:9beb9b99695d 284 strcpy(httpHeader, "HTTP/1.0 200 OK");
hudakz 15:9beb9b99695d 285 strcpy(httpBuf, "<p>Usage: http://host_or_ip/password</p>\r\n");
hudakz 15:9beb9b99695d 286 sendHTTP(client, httpHeader, httpBuf);
hudakz 15:9beb9b99695d 287 }
hudakz 15:9beb9b99695d 288 else {
hudakz 15:9beb9b99695d 289 int cmd = analyseURL(httpBuf);
hudakz 15:9beb9b99695d 290 switch (cmd) {
hudakz 15:9beb9b99695d 291 case -3:
hudakz 15:9beb9b99695d 292 // update webpage
hudakz 15:9beb9b99695d 293 strcpy(httpHeader, "HTTP/1.0 200 OK");
hudakz 15:9beb9b99695d 294 sendHTTP(client, httpHeader, showWebPage(output));
hudakz 15:9beb9b99695d 295 break;
hudakz 0:68a0003c4cb8 296
hudakz 15:9beb9b99695d 297 case -2:
hudakz 15:9beb9b99695d 298 // redirect to the right base url
hudakz 15:9beb9b99695d 299 strcpy(httpHeader, "HTTP/1.0 301 Moved Permanently\r\nLocation: ");
hudakz 15:9beb9b99695d 300 sendHTTP(client, httpHeader, movedPermanently(1));
hudakz 15:9beb9b99695d 301 break;
hudakz 15:9beb9b99695d 302
hudakz 15:9beb9b99695d 303 case -1:
hudakz 15:9beb9b99695d 304 strcpy(httpHeader, "HTTP/1.0 401 Unauthorized");
hudakz 15:9beb9b99695d 305 strcpy(httpBuf, "<h1>401 Unauthorized</h1>");
hudakz 15:9beb9b99695d 306 sendHTTP(client, httpHeader, httpBuf);
hudakz 15:9beb9b99695d 307 break;
hudakz 15:9beb9b99695d 308
hudakz 15:9beb9b99695d 309 case 0:
hudakz 15:9beb9b99695d 310 output = OFF; // output off
hudakz 15:9beb9b99695d 311 strcpy(httpHeader, "HTTP/1.0 200 OK");
hudakz 15:9beb9b99695d 312 sendHTTP(client, httpHeader, showWebPage(output));
hudakz 15:9beb9b99695d 313 break;
hudakz 15:9beb9b99695d 314
hudakz 15:9beb9b99695d 315 case 1:
hudakz 15:9beb9b99695d 316 output = ON; // output on
hudakz 15:9beb9b99695d 317 strcpy(httpHeader, "HTTP/1.0 200 OK");
hudakz 15:9beb9b99695d 318 sendHTTP(client, httpHeader, showWebPage(output));
hudakz 15:9beb9b99695d 319 break;
hudakz 15:9beb9b99695d 320 }
hudakz 15:9beb9b99695d 321 }
hudakz 0:68a0003c4cb8 322 }
hudakz 11:6c0b20227ca2 323
hudakz 10:b47c7921346f 324 client->close();
hudakz 0:68a0003c4cb8 325 }
hudakz 0:68a0003c4cb8 326 }
hudakz 0:68a0003c4cb8 327 }