Webserver controller with url trimming for value controls
Dependencies: LCD_DISCO_F746NG BSP_DISCO_F746NG
main.cpp@3:c927a415dd38, 2017-05-06 (annotated)
- Committer:
- hudakz
- Date:
- Sat May 06 07:43:20 2017 +0000
- Revision:
- 3:c927a415dd38
- Parent:
- 2:33e8bb5615a6
- Child:
- 4:d7c37f516f5f
Updated.
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
hudakz | 0:e455fdb56bc8 | 1 | #include "mbed.h" |
hudakz | 0:e455fdb56bc8 | 2 | #include "EthernetInterface.h" |
hudakz | 0:e455fdb56bc8 | 3 | #include "TCPServer.h" |
hudakz | 0:e455fdb56bc8 | 4 | #include "TCPSocket.h" |
hudakz | 0:e455fdb56bc8 | 5 | #include <stdio.h> |
hudakz | 0:e455fdb56bc8 | 6 | #include <string> |
hudakz | 0:e455fdb56bc8 | 7 | |
hudakz | 0:e455fdb56bc8 | 8 | using namespace std; |
hudakz | 0:e455fdb56bc8 | 9 | |
hudakz | 0:e455fdb56bc8 | 10 | #define PORT 80 |
hudakz | 0:e455fdb56bc8 | 11 | |
hudakz | 0:e455fdb56bc8 | 12 | EthernetInterface ethernet; |
hudakz | 0:e455fdb56bc8 | 13 | TCPServer server; |
hudakz | 0:e455fdb56bc8 | 14 | TCPSocket clientSocket; |
hudakz | 0:e455fdb56bc8 | 15 | SocketAddress clientAddress; |
hudakz | 0:e455fdb56bc8 | 16 | char receiveBuf[1024] = { }; |
hudakz | 0:e455fdb56bc8 | 17 | |
hudakz | 0:e455fdb56bc8 | 18 | const int OFF = 0; |
hudakz | 0:e455fdb56bc8 | 19 | const int ON = 1; |
hudakz | 0:e455fdb56bc8 | 20 | |
hudakz | 0:e455fdb56bc8 | 21 | DigitalOut sw(LED1); |
hudakz | 2:33e8bb5615a6 | 22 | float roomTemp = 21.8; // A temperature sensor output |
hudakz | 0:e455fdb56bc8 | 23 | |
hudakz | 0:e455fdb56bc8 | 24 | const string PASSWORD = "secret"; // change as you like |
hudakz | 0:e455fdb56bc8 | 25 | const string HTTP_OK = "HTTP/1.0 200 OK"; |
hudakz | 0:e455fdb56bc8 | 26 | const string MOVED_PERM = "HTTP/1.0 301 Moved Permanently\r\nLocation: "; |
hudakz | 0:e455fdb56bc8 | 27 | const string UNAUTHORIZED = "HTTP/1.0 401 Unauthorized"; |
hudakz | 0:e455fdb56bc8 | 28 | string httpHeader; // HTTP header |
hudakz | 0:e455fdb56bc8 | 29 | string httpContent; // HTTP content |
hudakz | 2:33e8bb5615a6 | 30 | |
hudakz | 2:33e8bb5615a6 | 31 | /** |
hudakz | 2:33e8bb5615a6 | 32 | * @brief Defines a custom MAC address |
hudakz | 2:33e8bb5615a6 | 33 | * @note Uncomment the code below to define a unique MAC address. |
hudakz | 2:33e8bb5615a6 | 34 | * Modify the mac array items as needed. |
hudakz | 2:33e8bb5615a6 | 35 | * @param |
hudakz | 2:33e8bb5615a6 | 36 | * @retval |
hudakz | 2:33e8bb5615a6 | 37 | */ |
hudakz | 2:33e8bb5615a6 | 38 | //extern "C" void mbed_mac_address(char* mac) { |
hudakz | 2:33e8bb5615a6 | 39 | // mac[0] = 0x00; |
hudakz | 2:33e8bb5615a6 | 40 | // mac[1] = 0x01; |
hudakz | 2:33e8bb5615a6 | 41 | // mac[2] = 0x02; |
hudakz | 2:33e8bb5615a6 | 42 | // mac[3] = 0x03; |
hudakz | 2:33e8bb5615a6 | 43 | // mac[4] = 0x04; |
hudakz | 2:33e8bb5615a6 | 44 | // mac[5] = 0x05; |
hudakz | 2:33e8bb5615a6 | 45 | //}; |
hudakz | 0:e455fdb56bc8 | 46 | |
hudakz | 2:33e8bb5615a6 | 47 | /** |
hudakz | 2:33e8bb5615a6 | 48 | * @brief Analyses the received URL |
hudakz | 2:33e8bb5615a6 | 49 | * @note The string passed to this function will look like this: |
hudakz | 2:33e8bb5615a6 | 50 | * GET /password HTTP/1..... |
hudakz | 2:33e8bb5615a6 | 51 | * GET /password/ HTTP/1..... |
hudakz | 2:33e8bb5615a6 | 52 | * GET /password/?sw=1 HTTP/1..... |
hudakz | 2:33e8bb5615a6 | 53 | * GET /password/?sw=0 HTTP/1..... |
hudakz | 2:33e8bb5615a6 | 54 | * @param url URL string |
hudakz | 2:33e8bb5615a6 | 55 | * @retval -1 invalid password |
hudakz | 2:33e8bb5615a6 | 56 | * -2 no command given but password valid |
hudakz | 2:33e8bb5615a6 | 57 | * -3 just refresh page |
hudakz | 2:33e8bb5615a6 | 58 | * 0 switch off |
hudakz | 2:33e8bb5615a6 | 59 | * 1 switch on |
hudakz | 2:33e8bb5615a6 | 60 | */ |
hudakz | 2:33e8bb5615a6 | 61 | int8_t analyseURL(string& url) { |
hudakz | 2:33e8bb5615a6 | 62 | if(url.substr(5, PASSWORD.size()) != PASSWORD) |
hudakz | 0:e455fdb56bc8 | 63 | return(-1); |
hudakz | 0:e455fdb56bc8 | 64 | |
hudakz | 0:e455fdb56bc8 | 65 | uint8_t pos = 5 + PASSWORD.size(); |
hudakz | 0:e455fdb56bc8 | 66 | |
hudakz | 2:33e8bb5615a6 | 67 | if(url.substr(pos, 1) == " ") |
hudakz | 0:e455fdb56bc8 | 68 | return(-2); |
hudakz | 0:e455fdb56bc8 | 69 | |
hudakz | 2:33e8bb5615a6 | 70 | if(url.substr(pos++, 1) != "/") |
hudakz | 0:e455fdb56bc8 | 71 | return(-1); |
hudakz | 0:e455fdb56bc8 | 72 | |
hudakz | 2:33e8bb5615a6 | 73 | string cmd(url.substr(pos, 5)); |
hudakz | 0:e455fdb56bc8 | 74 | |
hudakz | 0:e455fdb56bc8 | 75 | if(cmd == "?sw=0") |
hudakz | 2:33e8bb5615a6 | 76 | return(0); |
hudakz | 0:e455fdb56bc8 | 77 | |
hudakz | 0:e455fdb56bc8 | 78 | if(cmd == "?sw=1") |
hudakz | 2:33e8bb5615a6 | 79 | return(1); |
hudakz | 0:e455fdb56bc8 | 80 | |
hudakz | 0:e455fdb56bc8 | 81 | return(-3); |
hudakz | 0:e455fdb56bc8 | 82 | } |
hudakz | 0:e455fdb56bc8 | 83 | |
hudakz | 0:e455fdb56bc8 | 84 | /** |
hudakz | 0:e455fdb56bc8 | 85 | * @brief |
hudakz | 0:e455fdb56bc8 | 86 | * @note |
hudakz | 0:e455fdb56bc8 | 87 | * @param |
hudakz | 0:e455fdb56bc8 | 88 | * @retval |
hudakz | 0:e455fdb56bc8 | 89 | */ |
hudakz | 0:e455fdb56bc8 | 90 | string& movedPermanently(uint8_t flag) { |
hudakz | 0:e455fdb56bc8 | 91 | if(flag == 1) |
hudakz | 0:e455fdb56bc8 | 92 | httpContent = "/" + PASSWORD + "/"; |
hudakz | 0:e455fdb56bc8 | 93 | else |
hudakz | 0:e455fdb56bc8 | 94 | httpContent = ""; |
hudakz | 0:e455fdb56bc8 | 95 | |
hudakz | 0:e455fdb56bc8 | 96 | httpContent += "<h1>301 Moved Permanently</h1>\r\n"; |
hudakz | 0:e455fdb56bc8 | 97 | |
hudakz | 0:e455fdb56bc8 | 98 | return(httpContent); |
hudakz | 0:e455fdb56bc8 | 99 | } |
hudakz | 0:e455fdb56bc8 | 100 | |
hudakz | 0:e455fdb56bc8 | 101 | /** |
hudakz | 0:e455fdb56bc8 | 102 | * @brief |
hudakz | 0:e455fdb56bc8 | 103 | * @note |
hudakz | 0:e455fdb56bc8 | 104 | * @param |
hudakz | 0:e455fdb56bc8 | 105 | * @retval |
hudakz | 0:e455fdb56bc8 | 106 | */ |
hudakz | 0:e455fdb56bc8 | 107 | string& showWebPage(uint8_t status) { |
hudakz | 2:33e8bb5615a6 | 108 | char roomTempStr[5]; |
hudakz | 0:e455fdb56bc8 | 109 | |
hudakz | 2:33e8bb5615a6 | 110 | //roomTemp = ds1820.read(); |
hudakz | 2:33e8bb5615a6 | 111 | sprintf(roomTempStr, "%3.1f", roomTemp); |
hudakz | 2:33e8bb5615a6 | 112 | |
hudakz | 2:33e8bb5615a6 | 113 | httpContent = "<h2><a href=\".\" title=\"Click to refresh the page\">Smart Home</a></h2>"; |
hudakz | 2:33e8bb5615a6 | 114 | httpContent += "<pre>Temperature:\t" + string(roomTempStr) + "°C\r\n</pre>"; |
hudakz | 0:e455fdb56bc8 | 115 | |
hudakz | 0:e455fdb56bc8 | 116 | if(status == ON) { |
hudakz | 2:33e8bb5615a6 | 117 | httpContent += "<pre>\r\nHeating:\t<font color=#FF0000>On </font>"; |
hudakz | 2:33e8bb5615a6 | 118 | httpContent += " <a href=\"./?sw=0\"><button>Turn off</button></a>\r\n"; |
hudakz | 0:e455fdb56bc8 | 119 | } |
hudakz | 0:e455fdb56bc8 | 120 | else { |
hudakz | 2:33e8bb5615a6 | 121 | httpContent += "<pre>\r\nHeating:\t<font color=#999999>Off</font>"; |
hudakz | 2:33e8bb5615a6 | 122 | httpContent += " <a href=\"./?sw=1\"><button>Turn on</button></a>\r\n"; |
hudakz | 0:e455fdb56bc8 | 123 | } |
hudakz | 0:e455fdb56bc8 | 124 | |
hudakz | 0:e455fdb56bc8 | 125 | httpContent += "</pre>\r\n"; |
hudakz | 0:e455fdb56bc8 | 126 | httpContent += "<hr>\r\n"; |
hudakz | 2:33e8bb5615a6 | 127 | httpContent += "<pre>2017 ARMmbed</pre>"; |
hudakz | 0:e455fdb56bc8 | 128 | return httpContent; |
hudakz | 0:e455fdb56bc8 | 129 | } |
hudakz | 0:e455fdb56bc8 | 130 | |
hudakz | 0:e455fdb56bc8 | 131 | /** |
hudakz | 0:e455fdb56bc8 | 132 | * @brief |
hudakz | 0:e455fdb56bc8 | 133 | * @note |
hudakz | 0:e455fdb56bc8 | 134 | * @param |
hudakz | 0:e455fdb56bc8 | 135 | * @retval |
hudakz | 0:e455fdb56bc8 | 136 | */ |
hudakz | 0:e455fdb56bc8 | 137 | void sendHTTP(TCPSocket& client, string& header, string& content) { |
hudakz | 0:e455fdb56bc8 | 138 | char content_length[5] = { }; |
hudakz | 0:e455fdb56bc8 | 139 | |
hudakz | 0:e455fdb56bc8 | 140 | header += "\r\nContent-Type: text/html\r\n"; |
hudakz | 0:e455fdb56bc8 | 141 | header += "Content-Length: "; |
hudakz | 0:e455fdb56bc8 | 142 | sprintf(content_length, "%d", content.length()); |
hudakz | 0:e455fdb56bc8 | 143 | header += string(content_length) + "\r\n"; |
hudakz | 0:e455fdb56bc8 | 144 | header += "Pragma: no-cache\r\n"; |
hudakz | 0:e455fdb56bc8 | 145 | header += "Connection: About to close\r\n"; |
hudakz | 0:e455fdb56bc8 | 146 | header += "\r\n"; |
hudakz | 0:e455fdb56bc8 | 147 | |
hudakz | 0:e455fdb56bc8 | 148 | string webpage = header + content; |
hudakz | 0:e455fdb56bc8 | 149 | client.send((char*)webpage.c_str(), webpage.length()); |
hudakz | 0:e455fdb56bc8 | 150 | printf("HTTP sent.\n\r"); |
hudakz | 0:e455fdb56bc8 | 151 | } |
hudakz | 0:e455fdb56bc8 | 152 | |
hudakz | 0:e455fdb56bc8 | 153 | /** |
hudakz | 0:e455fdb56bc8 | 154 | * @brief |
hudakz | 0:e455fdb56bc8 | 155 | * @note |
hudakz | 0:e455fdb56bc8 | 156 | * @param |
hudakz | 0:e455fdb56bc8 | 157 | * @retval |
hudakz | 0:e455fdb56bc8 | 158 | */ |
hudakz | 0:e455fdb56bc8 | 159 | int main(void) { |
hudakz | 3:c927a415dd38 | 160 | //ethernet.set_network("192.168.1.181","255.255.255.0","192.168.1.1"); // use static IP address (IP address, netmask, gateway) |
hudakz | 0:e455fdb56bc8 | 161 | ethernet.connect(); |
hudakz | 0:e455fdb56bc8 | 162 | printf("Usage: Type %s/%s/ into your web browser and hit ENTER\r\n", ethernet.get_ip_address(), PASSWORD); |
hudakz | 0:e455fdb56bc8 | 163 | |
hudakz | 0:e455fdb56bc8 | 164 | /* Open the server on ethernet stack */ |
hudakz | 0:e455fdb56bc8 | 165 | server.open(ðernet); |
hudakz | 0:e455fdb56bc8 | 166 | |
hudakz | 0:e455fdb56bc8 | 167 | /* Bind the HTTP port (TCP 80) to the server */ |
hudakz | 0:e455fdb56bc8 | 168 | server.bind(ethernet.get_ip_address(), 80); |
hudakz | 0:e455fdb56bc8 | 169 | |
hudakz | 0:e455fdb56bc8 | 170 | /* Can handle 5 simultaneous connections */ |
hudakz | 0:e455fdb56bc8 | 171 | server.listen(5); |
hudakz | 0:e455fdb56bc8 | 172 | |
hudakz | 0:e455fdb56bc8 | 173 | //listening for http GET request |
hudakz | 0:e455fdb56bc8 | 174 | while(true) { |
hudakz | 2:33e8bb5615a6 | 175 | printf("\r\n=========================================\r\n"); |
hudakz | 2:33e8bb5615a6 | 176 | printf("Ready to serve clients.\r\n"); |
hudakz | 0:e455fdb56bc8 | 177 | server.accept(&clientSocket, &clientAddress); |
hudakz | 0:e455fdb56bc8 | 178 | printf("Connection succeeded!\n\rIP: %s\n\r", clientAddress.get_ip_address()); |
hudakz | 0:e455fdb56bc8 | 179 | clientSocket.recv(receiveBuf, 1023); |
hudakz | 0:e455fdb56bc8 | 180 | printf("Recieved Data: %d\n\r\n\r%.*s\n\r", strlen(receiveBuf), strlen(receiveBuf), receiveBuf); |
hudakz | 0:e455fdb56bc8 | 181 | |
hudakz | 0:e455fdb56bc8 | 182 | string received(receiveBuf); |
hudakz | 2:33e8bb5615a6 | 183 | |
hudakz | 0:e455fdb56bc8 | 184 | if(received.substr(0, 3) != "GET") { |
hudakz | 0:e455fdb56bc8 | 185 | httpHeader = HTTP_OK; |
hudakz | 0:e455fdb56bc8 | 186 | httpContent = "<h1>200 OK</h1>"; |
hudakz | 0:e455fdb56bc8 | 187 | sendHTTP(clientSocket, httpHeader, httpContent); |
hudakz | 0:e455fdb56bc8 | 188 | continue; |
hudakz | 0:e455fdb56bc8 | 189 | } |
hudakz | 0:e455fdb56bc8 | 190 | |
hudakz | 0:e455fdb56bc8 | 191 | if(received.substr(0, 6) == "GET / ") { |
hudakz | 0:e455fdb56bc8 | 192 | httpHeader = HTTP_OK; |
hudakz | 0:e455fdb56bc8 | 193 | httpContent = "<p>Usage: Type http://ip_address/password/ into your web browser and hit ENTER</p>\r\n"; |
hudakz | 0:e455fdb56bc8 | 194 | sendHTTP(clientSocket, httpHeader, httpContent); |
hudakz | 0:e455fdb56bc8 | 195 | continue; |
hudakz | 0:e455fdb56bc8 | 196 | } |
hudakz | 0:e455fdb56bc8 | 197 | |
hudakz | 0:e455fdb56bc8 | 198 | int cmd = analyseURL(received); |
hudakz | 0:e455fdb56bc8 | 199 | |
hudakz | 0:e455fdb56bc8 | 200 | if(cmd == -2) { |
hudakz | 0:e455fdb56bc8 | 201 | |
hudakz | 0:e455fdb56bc8 | 202 | // redirect to the right base url |
hudakz | 0:e455fdb56bc8 | 203 | httpHeader = MOVED_PERM; |
hudakz | 0:e455fdb56bc8 | 204 | sendHTTP(clientSocket, httpHeader, movedPermanently(1)); |
hudakz | 0:e455fdb56bc8 | 205 | continue; |
hudakz | 0:e455fdb56bc8 | 206 | } |
hudakz | 0:e455fdb56bc8 | 207 | |
hudakz | 0:e455fdb56bc8 | 208 | if(cmd == -1) { |
hudakz | 0:e455fdb56bc8 | 209 | httpHeader = UNAUTHORIZED; |
hudakz | 0:e455fdb56bc8 | 210 | httpContent = "<h1>401 Unauthorized</h1>"; |
hudakz | 0:e455fdb56bc8 | 211 | sendHTTP(clientSocket, httpHeader, httpContent); |
hudakz | 0:e455fdb56bc8 | 212 | continue; |
hudakz | 0:e455fdb56bc8 | 213 | } |
hudakz | 0:e455fdb56bc8 | 214 | |
hudakz | 0:e455fdb56bc8 | 215 | if(cmd == ON) { |
hudakz | 0:e455fdb56bc8 | 216 | sw = ON; // turn the switch on |
hudakz | 0:e455fdb56bc8 | 217 | } |
hudakz | 0:e455fdb56bc8 | 218 | |
hudakz | 0:e455fdb56bc8 | 219 | if(cmd == OFF) { |
hudakz | 0:e455fdb56bc8 | 220 | sw = OFF; // turn the switch off |
hudakz | 0:e455fdb56bc8 | 221 | } |
hudakz | 0:e455fdb56bc8 | 222 | |
hudakz | 0:e455fdb56bc8 | 223 | httpHeader = HTTP_OK; |
hudakz | 0:e455fdb56bc8 | 224 | sendHTTP(clientSocket, httpHeader, showWebPage(sw)); |
hudakz | 0:e455fdb56bc8 | 225 | } |
hudakz | 0:e455fdb56bc8 | 226 | } |