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- //webServer is called each tick, all variable not declared in this snippet are declared in a separate header file.
- void webServer(){
- EthernetClient client = server.available(); //Listens on port 80
- if (client) { // got client?
- boolean currentLineIsBlank = true;
- while (client.connected()) {
- if (client.available()) { // client data available to read
- char c = client.read(); // read 1 byte (character) from client
- // buffer first part of HTTP request in HTTP_req array (string)
- // leave last element in array as 0 to null terminate string (REQ_BUF_SZ - 1)
- if (req_index < (REQ_BUF_SZ - 1)) {
- HTTP_req[req_index] = c; // save HTTP request character
- req_index++;
- }
- // last line of client request is blank and ends with \n
- // respond to client only after last line received
- if (c == '\n' && currentLineIsBlank) {
- // open requested web page file
- if (StrContains(HTTP_req, "GET / ")
- || StrContains(HTTP_req, "GET /index.htm")) {
- client.println(F("HTTP/1.1 200 OK"));
- client.println(F("Content-Type: text/html"));
- client.println(F("Connnection: close"));
- client.println();
- webFile = SD.open("index.htm"); // open web page file
- }
- else if (StrContains(HTTP_req, "GET /logo.jpg")) {
- webFile = SD.open("logo.jpg");
- if (webFile) {
- client.println(F("HTTP/1.1 200 OK"));
- client.println();
- }
- }
- if (webFile) {
- while(webFile.available()) {
- client.write(webFile.read()); // send web page to client
- }
- webFile.close();
- }
- else
- {
- client.println(F("Error, please Check;")); //Catch any error code and report if unable to find files.
- client.println(dStatus); //Error code is int 1-6, indicates what file was missing and if SD initialized
- }
- // reset buffer index and all buffer elements to 0
- req_index = 0;
- StrClear(HTTP_req, REQ_BUF_SZ);
- break;
- }
- // every line of text received from the client ends with \r\n
- if (c == '\n') {
- // last character on line of received text
- // starting new line with next character read
- currentLineIsBlank = true;
- }
- else if (c != '\r') {
- // a text character was received from client
- currentLineIsBlank = false;
- }
- } // end if (client.available())
- } // end while (client.connected())
- delay(1); // give the web browser time to receive the data
- client.stop(); // close the connection
- } // end if (client)
- }
- // sets every element of str to 0 (clears array)
- void StrClear(char *str, char length)
- {
- for (int i = 0; i < length; i++) {
- str[i] = 0;
- }
- }
- // searches for the string sfind in the string str
- // returns 1 if string found
- // returns 0 if string not found
- char StrContains(char *str, char *sfind)
- {
- char found = 0;
- char index = 0;
- char len;
- len = strlen(str);
- if (strlen(sfind) > len) {
- return 0;
- }
- while (index < len) {
- if (str[index] == sfind[found]) {
- found++;
- if (strlen(sfind) == found) {
- return 1;
- }
- }
- else {
- found = 0;
- }
- index++;
- }
- return 0;
- }
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