Ferdinand Stueckler / Mbed 2 deprecated Nucleo_ESP8266_Webswitch

WEB server handles an ESP8266 module to control a LED

Dependencies:   mbed

Fork of WebSwitch_ENC28J60 by Zoltan Hudak

main.cpp@0:68a0003c4cb8, 2014-09-15 (annotated)

Committer:
hudakz
Date:
Mon Sep 15 11:17:50 2014 +0000
Revision:
0:68a0003c4cb8
Child:
1:3d9c83af7246
rev. 00

Who changed what in which revision?

UserRevisionLine numberNew contents of line
hudakz 0:68a0003c4cb8 1 /* In this example LED1 is switched on/off using a web browser connected to this HTTP server.
hudakz 0:68a0003c4cb8 2 * The example is based on the Tuxgraphics Web Switch <tuxgraphics.org>.
hudakz 0:68a0003c4cb8 3 * This HTTP server is built around the UIPEthernet library for the ENC28J60 chip <https://github.com/ntruchsess/arduino_uip>
hudakz 0:68a0003c4cb8 4 * ported to mbed.
hudakz 0:68a0003c4cb8 5 */
hudakz 0:68a0003c4cb8 6
hudakz 0:68a0003c4cb8 7 #include <mbed.h>
hudakz 0:68a0003c4cb8 8 #include <UIPEthernet.h>
hudakz 0:68a0003c4cb8 9 #include <UIPServer.h>
hudakz 0:68a0003c4cb8 10 #include <UIPClient.h>
hudakz 0:68a0003c4cb8 11 #include <string>
hudakz 0:68a0003c4cb8 12
hudakz 0:68a0003c4cb8 13 using namespace std;
hudakz 0:68a0003c4cb8 14
hudakz 0:68a0003c4cb8 15 // UIPEthernet is the name of a global instance of UIPEthernetClass.
hudakz 0:68a0003c4cb8 16 // Do not change the name! It is used within the UIPEthernet library.
hudakz 0:68a0003c4cb8 17 // Adapt the SPI pin names to your mbed platform/board if not present yet.
hudakz 0:68a0003c4cb8 18 #if defined(TARGET_LPC1768)
hudakz 0:68a0003c4cb8 19 UIPEthernetClass UIPEthernet(p11, p12, p13, p8); // mosi, miso, sck, cs
hudakz 0:68a0003c4cb8 20 #elif defined(TARGET_LPC1114)
hudakz 0:68a0003c4cb8 21 UIPEthernetClass UIPEthernet(dp2, dp1, dp6, dp25); // mosi, miso, sck, cs
hudakz 0:68a0003c4cb8 22 #elif defined(TARGET_LPC11U68)
hudakz 0:68a0003c4cb8 23 UIPEthernetClass UIPEthernet(P0_9, P0_8, P1_29, P0_2); // mosi, miso, sck, cs
hudakz 0:68a0003c4cb8 24 #elif defined (TARGET_NUCLEO_F103RB)
hudakz 0:68a0003c4cb8 25 UIPEthernetClass UIPEthernet(PB_5, PB_4, PB_3, PB_6); // mosi, miso, sck, cs
hudakz 0:68a0003c4cb8 26 #endif
hudakz 0:68a0003c4cb8 27
hudakz 0:68a0003c4cb8 28
hudakz 0:68a0003c4cb8 29 // MAC number must be unique within the connected network. Modify as appropriate.
hudakz 0:68a0003c4cb8 30 const uint8_t MY_MAC[6] = {0x00,0x01,0x02,0x03,0x04,0x05};
hudakz 0:68a0003c4cb8 31 // IP address must be also unique and compatible with your network. Change as appropriate.
hudakz 0:68a0003c4cb8 32 const IPAddress MY_IP(192,168,1,181);
hudakz 0:68a0003c4cb8 33 const uint16_t MY_PORT = 80; // for HTTP connection
hudakz 0:68a0003c4cb8 34 EthernetServer myServer = EthernetServer(MY_PORT);
hudakz 0:68a0003c4cb8 35 // In this example we are turning on/off LED1.
hudakz 0:68a0003c4cb8 36 // Change the pin name if you would like to switch on/off something else.
hudakz 0:68a0003c4cb8 37 // However, make sure you avoid SPI pin names used already for UIPEthernet.
hudakz 0:68a0003c4cb8 38 DigitalOut sw(LED1);
hudakz 0:68a0003c4cb8 39
hudakz 0:68a0003c4cb8 40 const string PASSWORD = "secret"; // change as you like
hudakz 0:68a0003c4cb8 41 const string HTTP_OK = "HTTP/1.0 200 OK";
hudakz 0:68a0003c4cb8 42 const string MOVED_PERM = "HTTP/1.0 301 Moved Permanently\r\nLocation: ";
hudakz 0:68a0003c4cb8 43 const string UNAUTHORIZED = "HTTP/1.0 401 Unauthorized";
hudakz 0:68a0003c4cb8 44 string httpHeader; // HTTP header
hudakz 0:68a0003c4cb8 45 string httpContent; // HTTP content
hudakz 0:68a0003c4cb8 46
hudakz 0:68a0003c4cb8 47
hudakz 0:68a0003c4cb8 48 // analyse the url given
hudakz 0:68a0003c4cb8 49 // return values: -1 invalid password
hudakz 0:68a0003c4cb8 50 // -2 no command given but password valid
hudakz 0:68a0003c4cb8 51 // -3 just refresh page
hudakz 0:68a0003c4cb8 52 // 0 switch off
hudakz 0:68a0003c4cb8 53 // 1 switch on
hudakz 0:68a0003c4cb8 54 //
hudakz 0:68a0003c4cb8 55 // The string passed to this function will look like this:
hudakz 0:68a0003c4cb8 56 // GET /password HTTP/1.....
hudakz 0:68a0003c4cb8 57 // GET /password/ HTTP/1.....
hudakz 0:68a0003c4cb8 58 // GET /password/?sw=1 HTTP/1.....
hudakz 0:68a0003c4cb8 59 // GET /password/?sw=0 HTTP/1.....
hudakz 0:68a0003c4cb8 60
hudakz 0:68a0003c4cb8 61 int8_t analyse_get_url(string& str)
hudakz 0:68a0003c4cb8 62 {
hudakz 0:68a0003c4cb8 63 if(str.substr(5, PASSWORD.size()) != PASSWORD)
hudakz 0:68a0003c4cb8 64 return(-1);
hudakz 0:68a0003c4cb8 65
hudakz 0:68a0003c4cb8 66 uint8_t pos = 5 + PASSWORD.size();
hudakz 0:68a0003c4cb8 67
hudakz 0:68a0003c4cb8 68 if(str.substr(pos, 1) == " ")
hudakz 0:68a0003c4cb8 69 return(-2);
hudakz 0:68a0003c4cb8 70
hudakz 0:68a0003c4cb8 71 if(str.substr(pos, 1) != "/")
hudakz 0:68a0003c4cb8 72 return(-1);
hudakz 0:68a0003c4cb8 73
hudakz 0:68a0003c4cb8 74 pos++;
hudakz 0:68a0003c4cb8 75
hudakz 0:68a0003c4cb8 76 string cmd(str.substr(pos, 5));
hudakz 0:68a0003c4cb8 77
hudakz 0:68a0003c4cb8 78 if(cmd == "?sw=0")
hudakz 0:68a0003c4cb8 79 return(0);
hudakz 0:68a0003c4cb8 80
hudakz 0:68a0003c4cb8 81 if(cmd == "?sw=1")
hudakz 0:68a0003c4cb8 82 return(1);
hudakz 0:68a0003c4cb8 83
hudakz 0:68a0003c4cb8 84 return(-3);
hudakz 0:68a0003c4cb8 85 }
hudakz 0:68a0003c4cb8 86
hudakz 0:68a0003c4cb8 87 string& moved_perm(uint8_t flag)
hudakz 0:68a0003c4cb8 88 {
hudakz 0:68a0003c4cb8 89 if(flag == 1)
hudakz 0:68a0003c4cb8 90 httpContent = "/" + PASSWORD + "/";
hudakz 0:68a0003c4cb8 91 else
hudakz 0:68a0003c4cb8 92 httpContent = "";
hudakz 0:68a0003c4cb8 93
hudakz 0:68a0003c4cb8 94 httpContent += "<h1>301 Moved Permanently</h1>\r\n";
hudakz 0:68a0003c4cb8 95
hudakz 0:68a0003c4cb8 96 return (httpContent);
hudakz 0:68a0003c4cb8 97 }
hudakz 0:68a0003c4cb8 98
hudakz 0:68a0003c4cb8 99 string& page(uint8_t status)
hudakz 0:68a0003c4cb8 100 {
hudakz 0:68a0003c4cb8 101 httpContent = "<h2>Web Switch</h2>\r\n";
hudakz 0:68a0003c4cb8 102
hudakz 0:68a0003c4cb8 103 if(status == 1) {
hudakz 0:68a0003c4cb8 104 httpContent += "<pre>\r\n <font color=#FF0000>ON</font>";
hudakz 0:68a0003c4cb8 105 httpContent += " <a href=\"./?sw=0\">[switch off]</a>\r\n";
hudakz 0:68a0003c4cb8 106 } else {
hudakz 0:68a0003c4cb8 107 httpContent += "<pre>\r\n <font color=#00FF00>OFF</font>";
hudakz 0:68a0003c4cb8 108 httpContent += " <a href=\"./?sw=1\">[switch on]</a>\r\n";
hudakz 0:68a0003c4cb8 109 }
hudakz 0:68a0003c4cb8 110
hudakz 0:68a0003c4cb8 111 httpContent += " <a href=\".\">[refresh status]</a>\r\n";
hudakz 0:68a0003c4cb8 112 httpContent += "</pre>\r\n";
hudakz 0:68a0003c4cb8 113 httpContent += "<hr>\r\n";
hudakz 0:68a0003c4cb8 114 return httpContent;
hudakz 0:68a0003c4cb8 115 }
hudakz 0:68a0003c4cb8 116
hudakz 0:68a0003c4cb8 117 void http_send(EthernetClient& client, string& header, string& content)
hudakz 0:68a0003c4cb8 118 {
hudakz 0:68a0003c4cb8 119 char content_length[5] = {};
hudakz 0:68a0003c4cb8 120
hudakz 0:68a0003c4cb8 121 header += "\r\nContent-Type: text\r\n";
hudakz 0:68a0003c4cb8 122 header += "Content-Length: ";
hudakz 0:68a0003c4cb8 123 sprintf(content_length, "%d", content.length());
hudakz 0:68a0003c4cb8 124 header += string(content_length) + "\r\n";
hudakz 0:68a0003c4cb8 125 header += "Pragma: no-cache\r\n";
hudakz 0:68a0003c4cb8 126 header += "Connection: About to close\r\n";
hudakz 0:68a0003c4cb8 127 header += "\r\n";
hudakz 0:68a0003c4cb8 128 string webpage = header + content;
hudakz 0:68a0003c4cb8 129 client.write((uint8_t*)webpage.c_str(),webpage.length());
hudakz 0:68a0003c4cb8 130 }
hudakz 0:68a0003c4cb8 131
hudakz 0:68a0003c4cb8 132 int main()
hudakz 0:68a0003c4cb8 133 {
hudakz 0:68a0003c4cb8 134 Ethernet.begin(MY_MAC,MY_IP);
hudakz 0:68a0003c4cb8 135 myServer.begin();
hudakz 0:68a0003c4cb8 136 while(1) {
hudakz 0:68a0003c4cb8 137 EthernetClient client = myServer.available();
hudakz 0:68a0003c4cb8 138 if (client) {
hudakz 0:68a0003c4cb8 139 size_t size = client.available();
hudakz 0:68a0003c4cb8 140 if(size > 0) {
hudakz 0:68a0003c4cb8 141 uint8_t* buf = (uint8_t*)malloc(size);
hudakz 0:68a0003c4cb8 142 size = client.read(buf, size);
hudakz 0:68a0003c4cb8 143 string received((char*)buf);
hudakz 0:68a0003c4cb8 144 free(buf);
hudakz 0:68a0003c4cb8 145 if(received.substr(0, 3) != "GET") {
hudakz 0:68a0003c4cb8 146 // head, post or other method
hudakz 0:68a0003c4cb8 147 // for possible status codes see:
hudakz 0:68a0003c4cb8 148 // http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html
hudakz 0:68a0003c4cb8 149 httpHeader = HTTP_OK;
hudakz 0:68a0003c4cb8 150 httpContent = "<h1>200 OK</h1>";
hudakz 0:68a0003c4cb8 151 http_send(client, httpHeader, httpContent);
hudakz 0:68a0003c4cb8 152 continue;
hudakz 0:68a0003c4cb8 153 }
hudakz 0:68a0003c4cb8 154
hudakz 0:68a0003c4cb8 155 if(received.substr(0, 6) == "GET / ") {
hudakz 0:68a0003c4cb8 156 httpHeader = HTTP_OK;
hudakz 0:68a0003c4cb8 157 httpContent = "<p>Usage: http://host_or_ip/password</p>\r\n";
hudakz 0:68a0003c4cb8 158 http_send(client, httpHeader, httpContent);
hudakz 0:68a0003c4cb8 159 continue;
hudakz 0:68a0003c4cb8 160 }
hudakz 0:68a0003c4cb8 161
hudakz 0:68a0003c4cb8 162 int cmd = analyse_get_url(received);
hudakz 0:68a0003c4cb8 163
hudakz 0:68a0003c4cb8 164 if(cmd == -2) {
hudakz 0:68a0003c4cb8 165 // redirect to the right base url
hudakz 0:68a0003c4cb8 166 httpHeader = MOVED_PERM;
hudakz 0:68a0003c4cb8 167 http_send(client, httpHeader, moved_perm(1));
hudakz 0:68a0003c4cb8 168 continue;
hudakz 0:68a0003c4cb8 169 }
hudakz 0:68a0003c4cb8 170
hudakz 0:68a0003c4cb8 171 if(cmd == -1) {
hudakz 0:68a0003c4cb8 172 httpHeader = UNAUTHORIZED;
hudakz 0:68a0003c4cb8 173 httpContent = "<h1>401 Unauthorized</h1>";
hudakz 0:68a0003c4cb8 174 http_send(client, httpHeader, httpContent);
hudakz 0:68a0003c4cb8 175 continue;
hudakz 0:68a0003c4cb8 176 }
hudakz 0:68a0003c4cb8 177
hudakz 0:68a0003c4cb8 178 if(cmd == 1) {
hudakz 0:68a0003c4cb8 179 sw = 1; // switch on
hudakz 0:68a0003c4cb8 180 }
hudakz 0:68a0003c4cb8 181
hudakz 0:68a0003c4cb8 182 if(cmd == 0) {
hudakz 0:68a0003c4cb8 183 sw = 0; // switch off
hudakz 0:68a0003c4cb8 184 }
hudakz 0:68a0003c4cb8 185
hudakz 0:68a0003c4cb8 186 httpHeader = HTTP_OK;
hudakz 0:68a0003c4cb8 187 http_send(client, httpHeader, page(sw));
hudakz 0:68a0003c4cb8 188 }
hudakz 0:68a0003c4cb8 189 }
hudakz 0:68a0003c4cb8 190 }
hudakz 0:68a0003c4cb8 191 }
hudakz 0:68a0003c4cb8 192