Hi all,
Im working on an simple HTTP Server which serves files from the SD card. The difference to most of the ready made examples ist that it should serve most of the files and types recognized by the GET request.
The server is running on a MKR1000. It creates a Acces Point. For the beginning (testing purpose) it differentiates between two get request types. One is the simple "GET / " which will trigger when you request http://192.168.1.1 and everything else which will trigger (for example) at http://192.168.1.1/index.htm
The first function is working,it just sends the GET answer and the index.htm. But somehow 192.168.1.1/index.htm doesnt work and I get the Parsing error on my browser.
Otherwise, here is my code:
#include <SPI.h>
#include <SD.h>
#include <WiFi101.h>
// size of buffer used to capture HTTP requests
#define REQ_BUF_SZ 20
// MAC address from Ethernet shield sticker under board
char ssid[] = "wifi101-network"; // created AP name
int status = WL_IDLE_STATUS;
WiFiServer server(80);
File webFile;
char HTTP_req[REQ_BUF_SZ] = {0}; // buffered HTTP request stored as null terminated string
char FileName[10];
char req_index = 0; // index into HTTP_req buffer
void setup()
{
Serial.begin(9600); // for debugging
delay(2000);
//digitalWrite(10, HIGH);
// initialize SD card
Serial.println("Initializing SD card...");
if (!SD.begin(6)) {
Serial.println("ERROR - SD card initialization failed!");
return; // init failed
}
Serial.println("SUCCESS - SD card initialized.");
// check for index.htm file
if (!SD.exists("index.htm")) {
Serial.println("ERROR - Can't find index.htm file!");
return; // can't find index file
}
Serial.println("SUCCESS - Found index.htm file.");
status = WiFi.beginAP(ssid);
if (status != WL_AP_LISTENING) {
Serial.println("Creating access point failed");
// don't continue
while (true);
}
// wait 10 seconds for connection:
delay(10000);
// start the web server on port 80
server.begin();
}
void loop()
{
WiFiClient client = server.available(); // try to get client
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++;
}
// print HTTP request character to Serial monitor
Serial.print(c);
// 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 (strstr (HTTP_req, "GET / ") != 0) {
client.println("HTTP/1.1 200 OK");
client.println("Content-Type: text/html");
client.println("Connnection: close");
client.println();
webFile = SD.open("index.htm"); // open web page file
}
else if (strstr (HTTP_req, "GET /") != 0) {
char *fname;
fname = HTTP_req + 5; // look after the "GET /" (5 chars)
// look for the " HTTP/1.1" string and
// turn the first character of the substring into a 0 to clear it out.
(strstr (HTTP_req, " HTTP"))[0] = 0;
const char *ending = get_filename_ext(fname);
webFile = SD.open(fname);
if (webFile) {
client.println("HTTP/1.1 200 OK");
if (strstr (HTTP_req, "js") != 0) {
client.println("Content-Type: application/javascript");
}
else if (strstr (HTTP_req, "htm") != 0) {
client.println("Content-Type: text/html");
}
else if (strstr (HTTP_req, "html") != 0) {
client.println("Content-Type: text/html");
}
else if (strstr (HTTP_req, "css") != 0) {
client.println("Content-Type: text/css");
}
else if (strstr (HTTP_req, "ico") != 0) {
client.println("Content-Type: image/x-icon");
}
}
else {
Serial.print("Cant open: ");
Serial.println(fname);
}
}
if (webFile) {
while (webFile.available()) {
client.write(webFile.read()); // send web page to client
}
webFile.close();
}
// reset buffer index and all buffer elements to 0
req_index = 0;
chrClear(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 chrClear(char *str, char length)
{
for (int i = 0; i < length; i++) {
str[i] = 0;
}
}
const char *get_filename_ext(const char *filename) {
const char *dot = strrchr(filename, '.');
if (!dot || dot == filename) return "";
return dot + 1;
}
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;
}
Working if I just type 192.168.1.1
GET / HTTP/1.1
Host: 192.168.1.1
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: de-de
Connection: keep-alive
Accept-Encoding: gzip, deflate
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_6) AppleWebKit/601.7.7 (KHTML, like Gecko) Version/9.1.2 Safari/601.7.7
What I get when I request 192.168.1.1/index.htm. This error appears 3 times (I think it is just because the browser requested it 3 tiimes (?)).
GET /index.htm HTTP/1.1
Host: 192.168.1.1
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: de-de
Connection: keep-alive
Accept-Encoding: gzip, deflate
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_6) AppleWebKit/601.7.7 (KHTML, like Gecko) Version/9.1.2 Safari/601.7.7
The error on my Computer says
cannot parse response" (NSURLErrorDomain:-1017)
Thanks!
EDIT: and my index.htm looks like this
<html>
<header><title>This is title</title></header>
<body>
Hello world
</body>
</html>