Zoltan Hudak
/
WebSwitch_mbed-os
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WebSwitch_mbed-os
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Zoltan Hudak
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main.cpp
00001 #include "mbed.h" 00002 #include "EthernetInterface.h" 00003 #include "TCPSocket.h" 00004 #include <stdio.h> 00005 #include <string> 00006 using namespace std; 00007 00008 #define IP "192.168.1.181" 00009 #define GATEWAY "192.168.1.1" 00010 #define NETMASK "255.255.255.0" 00011 00012 #define PORT 80 00013 /* */ 00014 EthernetInterface* net; 00015 TCPSocket server; 00016 TCPSocket* client; 00017 char httpBuf[1500]; 00018 char httpHeader[256]; 00019 const int OFF = 0; 00020 const int ON = 1; 00021 const char PASSWORD[] = "secret"; // Change as you like 00022 DigitalOut output(LED1); 00023 float roomTemp = 21.8; // A temperature sensor output 00024 00025 /** 00026 * @brief Analyses the received URL 00027 * @note The string passed to this function will look like this: 00028 * GET /password HTTP/1..... 00029 * GET /password/ HTTP/1..... 00030 * GET /password/?sw=1 HTTP/1..... 00031 * GET /password/?sw=0 HTTP/1..... 00032 * @param url URL string 00033 * @retval -1 invalid password 00034 * -2 no command given but password valid 00035 * -3 just refresh page 00036 * 0 switch off 00037 * 1 switch on 00038 */ 00039 int8_t analyseURL(char* url) 00040 { 00041 if (strlen(url) < (5 + strlen(PASSWORD) + 1)) 00042 return(-1); 00043 00044 //if (url.substr(5, PASSWORD.size()) != PASSWORD) 00045 if (strncmp(url + 5, PASSWORD, strlen(PASSWORD)) != 0) 00046 return(-1); 00047 00048 uint8_t pos = 5 + strlen(PASSWORD); 00049 00050 //if (url.substr(pos, 1) != "/") 00051 00052 if (*(url + pos) != '/') 00053 return(-1); 00054 00055 //if (url.substr(pos++, 1) == " ") 00056 if (*(url + pos++) == ' ') 00057 return(-2); 00058 00059 //string cmd(url.substr(pos, 5)); 00060 *(url + pos + 5) = '\0'; // terminate the cmd string 00061 char* cmd = ((url + pos)); 00062 if (strcmp(cmd, "?sw=0") == 0) 00063 return(0); 00064 if (strcmp(cmd, "?sw=1") == 0) 00065 return(1); 00066 return(-3); 00067 } 00068 00069 /** 00070 * @brief 00071 * @note 00072 * @param 00073 * @retval 00074 */ 00075 char* movedPermanently(uint8_t flag) 00076 { 00077 memset(httpBuf, 0, sizeof(httpBuf)); 00078 if (flag == 1) { 00079 strcpy(httpBuf, "/"); 00080 strcat(httpBuf, PASSWORD); 00081 strcat(httpBuf, "/"); 00082 } 00083 00084 strcat(httpBuf, "<h1>301 Moved Permanently</h1>\r\n"); 00085 return(httpBuf); 00086 } 00087 00088 /** 00089 * @brief 00090 * @note 00091 * @param 00092 * @retval 00093 */ 00094 char* showWebPage(int status) 00095 { 00096 char roomTempStr[10] = { }; 00097 00098 //roomTemp = ds1820.read(); 00099 00100 sprintf(roomTempStr, "%3.1f", roomTemp); 00101 memset(httpBuf, 0, sizeof(httpBuf)); 00102 00103 /*$off*/ 00104 strcat 00105 ( 00106 httpBuf, 00107 "<head>" 00108 "<meta charset=\"utf-8\">" 00109 "<meta name=\"viewport\" content=\" initial-scale=1.0; maximum-scale=1.0; minimum-scale=1.0; user-scalable=0;\"/>" 00110 "<title>Smart Home</title>" 00111 "<link href='http://fonts.googleapis.com/css?family=Droid+Sans&v1' rel='stylesheet' type='text/css'>" 00112 "<style>" 00113 ".switch {" 00114 "position: relative;" 00115 "display: inline-block;" 00116 "width: 60px;" 00117 "height: 34px;" 00118 "}" 00119 ".switch input {display:none;}" 00120 ".slider {" 00121 "position: absolute;" 00122 "cursor: pointer;" 00123 "top: 0;" 00124 "left: 0;" 00125 "right: 0;" 00126 "bottom: 0;" 00127 "border-radius: 34px;" 00128 "background-color: #ccc;" 00129 "-webkit-transition: .4s;" 00130 "transition: .4s;" 00131 "}" 00132 ".slider:before {" 00133 "position: absolute;" 00134 "content: \"\";" 00135 "height: 26px;" 00136 "width: 26px;" 00137 "left: 4px;" 00138 "bottom: 4px;" 00139 "border-radius: 50%;" 00140 "background-color: white;" 00141 "-webkit-transition: .4s;" 00142 "transition: .4s;" 00143 "}" 00144 "input:checked + .slider {" 00145 "background-color: #8ce196;" 00146 "}" 00147 "input:focus + .slider {" 00148 "box-shadow: 0 0 1px #8ce196;" 00149 "}" 00150 "input:checked + .slider:before {" 00151 "-webkit-transform: translateX(26px);" 00152 "-ms-transform: translateX(26px);" 00153 "transform: translateX(26px);" 00154 "}" 00155 "</style>" 00156 "</head>" 00157 00158 "<body>" 00159 "<h2><a href=\".\" title=\"Click to refresh the page\">Smart Home</a></h2>" 00160 "<pre>Temperature:\t" 00161 ); 00162 strcat(httpBuf, roomTempStr); 00163 strcat(httpBuf, "°C</pre>"); 00164 strcat 00165 ( 00166 httpBuf, 00167 "<pre>Heating:\t" 00168 ); 00169 if(status == ON) { 00170 strcat 00171 ( 00172 httpBuf, 00173 "<a href=\"./?sw=0\" class=\"switch\"> " 00174 "<input type=\"checkbox\" checked>" 00175 ); 00176 } 00177 else { 00178 strcat 00179 ( 00180 httpBuf, 00181 "<a href=\"./?sw=1\" class=\"switch\"> " 00182 "<input type=\"checkbox\">" 00183 ); 00184 } 00185 strcat 00186 ( 00187 httpBuf, 00188 "<div class=\"slider\"></div>" 00189 "</a>" 00190 "</pre>" 00191 "<hr>" 00192 "<pre>2017 ARMmbed</pre>" 00193 "</body>" 00194 ); 00195 /*$on*/ 00196 return httpBuf; 00197 } 00198 00199 /** 00200 * @brief 00201 * @note 00202 * @param 00203 * @retval 00204 */ 00205 void sendHTTP(TCPSocket* client, char* header, char* content) 00206 { 00207 char content_length[10] = { }; 00208 sprintf(content_length, "%u\r\n", strlen(content)); 00209 strcat(header, "\r\nContent-Type: text/html\r\n"); 00210 strcat(header, "Content-Length: "); 00211 strcat(header, content_length); 00212 strcat(header, "Pragma: no-cache\r\n"); 00213 strcat(header, "Connection: About to close\r\n\r\n"); 00214 00215 char c = content[0]; 00216 memmove(httpBuf + strlen(header), httpBuf, strlen(content)); // make room for the header 00217 strcpy(httpBuf, header); // copy the header on front of the content 00218 httpBuf[strlen(header)] = c; 00219 client->send((uint8_t*)httpBuf, strlen(httpBuf)); 00220 } 00221 00222 /** 00223 * @brief 00224 * @note 00225 * @param 00226 * @retval 00227 */ 00228 int main(void) 00229 { 00230 printf("\r\n Starting \r\n"); 00231 00232 //ethLed.start(eth_led); 00233 //net = NetworkInterface::get_default_instance(); 00234 net = new EthernetInterface(); 00235 00236 //net->set_network("192.168.1.181","255.255.255.0","192.168.1.1"); // use static IP address, netmask, gateway 00237 if (!net) { 00238 printf("Error! No network inteface found.\n"); 00239 return 0; 00240 } 00241 00242 //net->set_network (IP, NETMASK, GATEWAY); // include this for using static IP address 00243 nsapi_size_or_error_t r = net->connect(); 00244 if (r != NSAPI_ERROR_OK) { 00245 printf("Error! net->connect() returned: %d\n", r); 00246 return r; 00247 } 00248 00249 // Show the network address 00250 SocketAddress addr; 00251 net->get_ip_address(&addr); 00252 printf("IP address: %s\n", addr.get_ip_address() ? addr.get_ip_address() : "None"); 00253 net->get_netmask(&addr); 00254 printf("Netmask: %s\n", addr.get_ip_address() ? addr.get_ip_address() : "None"); 00255 net->get_gateway(&addr); 00256 printf("Gateway: %s\n", addr.get_ip_address() ? addr.get_ip_address() : "None"); 00257 00258 /* Open the server on ethernet stack */ 00259 server.open(net); 00260 00261 /* Bind the HTTP port (TCP 80) to the server */ 00262 server.bind(PORT); 00263 00264 /* Listen for clients */ 00265 server.listen(); 00266 00267 printf("=========================================\r\n"); 00268 printf("Ready to serve clients.\r\n"); 00269 net->get_ip_address(&addr); 00270 printf("Usage: Type http:\/\/%s\/%s\/ into your web browser and hit ENTER\r\n", addr.get_ip_address(), PASSWORD); 00271 while (true) { 00272 //listening for http GET request 00273 client = server.accept(); 00274 if (client) { 00275 client->getpeername(&addr); 00276 printf("Connection succeeded!\n\rIP: %s\n\r", addr.get_ip_address()); 00277 client->recv(httpBuf, 1500); 00278 if (strncmp(httpBuf, "GET", 3) != 0) { 00279 strcpy(httpHeader, "HTTP/1.0 200 OK"); 00280 strcpy(httpBuf, "<h1>200 OK</h1>"); 00281 sendHTTP(client, httpHeader, httpBuf); 00282 } 00283 else 00284 if ((strncmp(httpBuf, "GET", 3) == 0) && (strncmp(httpBuf + 3, " / ", 3 == 0))) { 00285 strcpy(httpHeader, "HTTP/1.0 200 OK"); 00286 strcpy(httpBuf, "<p>Usage: http://host_or_ip/password</p>\r\n"); 00287 sendHTTP(client, httpHeader, httpBuf); 00288 } 00289 else { 00290 int cmd = analyseURL(httpBuf); 00291 switch (cmd) { 00292 case -3: 00293 // update webpage 00294 strcpy(httpHeader, "HTTP/1.0 200 OK"); 00295 sendHTTP(client, httpHeader, showWebPage(output)); 00296 break; 00297 00298 case -2: 00299 // redirect to the right base url 00300 strcpy(httpHeader, "HTTP/1.0 301 Moved Permanently\r\nLocation: "); 00301 sendHTTP(client, httpHeader, movedPermanently(1)); 00302 break; 00303 00304 case -1: 00305 strcpy(httpHeader, "HTTP/1.0 401 Unauthorized"); 00306 strcpy(httpBuf, "<h1>401 Unauthorized</h1>"); 00307 sendHTTP(client, httpHeader, httpBuf); 00308 break; 00309 00310 case 0: 00311 output = OFF; // output off 00312 strcpy(httpHeader, "HTTP/1.0 200 OK"); 00313 sendHTTP(client, httpHeader, showWebPage(output)); 00314 break; 00315 00316 case 1: 00317 output = ON; // output on 00318 strcpy(httpHeader, "HTTP/1.0 200 OK"); 00319 sendHTTP(client, httpHeader, showWebPage(output)); 00320 break; 00321 } 00322 } 00323 00324 client->close(); 00325 } 00326 } 00327 }
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