// The mother- generic request method.
//
int RestClient::request(const char* method, String path, String body){
HTTP_DEBUG_PRINT("HTTP: connect\n");
if(client->connect(host, port)){
HTTP_DEBUG_PRINT("HTTP: connected\n");
HTTP_DEBUG_PRINT("REQUEST: \n");
// Make a HTTP request line:
String requestString = method;
requestString += " ";
requestString += path;
requestString += " HTTP/1.1";
requestString += "\r\n";
for(int i=0; i<num_headers; i++){
requestString += headers[i];
requestString += "\r\n";
}
requestString += "Host: ";
requestString += host;
requestString += "\r\n";
requestString += "Connection: close";
requestString += "\r\n";
//TODO: deal with binary content
if(body != ""){
requestString += "Content-Length: ";
requestString += body.length();
requestString += "\r\n";
requestString += "Content-Type: ";
requestString += contentType;
requestString += "\r\n\r\n";
requestString += body;
}
requestString += "\r\n\r\n";
client->print(requestString);
HTTP_DEBUG_PRINT(requestString);
// make sure you've sent all bytes. Ugly hack.
// TODO: check output buffer instead?
delay(50);
HTTP_DEBUG_PRINT("HTTP: call getResponse\n");
int statusCode = getResponse();
HTTP_DEBUG_PRINT("HTTP: return getResponse\n");
//cleanup
// only stop if server disconnected. Otherwise you can
// get in an infinite loop in getResponse:
if (!client->connected()) {
HTTP_DEBUG_PRINT("HTTP: stop client\n");
num_headers = 0;
//client->stop();
HTTP_DEBUG_PRINT("HTTP: client stopped\n");
}
return statusCode;
}else{
HTTP_DEBUG_PRINT("HTTP Connection failed\n");
return 0;
}
}
// The mother- generic request method.
//
int RestClient::request(const char* method, const char* path,
const char* body, String* response){
HTTP_DEBUG_PRINT("HTTP: connect\n");
if(client.connect(host, port)){
HTTP_DEBUG_PRINT("HTTP: connected\n");
HTTP_DEBUG_PRINT("REQUEST: \n");
// Make a HTTP request line:
write(method);
write(" ");
write(path);
write(" HTTP/1.1\r\n");
for(int i=0; i<num_headers; i++){
write(headers[i]);
write("\r\n");
}
write("Host: ");
write(host);
write("\r\n");
write("Connection: close\r\n");
if(body != NULL){
char contentLength[30];
sprintf(contentLength, "Content-Length: %d\r\n", strlen(body));
write(contentLength);
if(!contentTypeSet){
write("Content-Type: application/x-www-form-urlencoded\r\n");
}
}
write("\r\n");
if(body != NULL){
write(body);
write("\r\n");
write("\r\n");
}
//make sure you write all those bytes.
delay(100);
HTTP_DEBUG_PRINT("HTTP: call readResponse\n");
int statusCode = readResponse(response);
HTTP_DEBUG_PRINT("HTTP: return readResponse\n");
//cleanup
HTTP_DEBUG_PRINT("HTTP: stop client\n");
num_headers = 0;
client.stop();
delay(50);
HTTP_DEBUG_PRINT("HTTP: client stopped\n");
return statusCode;
}else{
HTTP_DEBUG_PRINT("HTTP Connection failed\n");
return 0;
}
}
void RestClient::write(const char* string){
HTTP_DEBUG_PRINT(string);
client.print(string);
}
int RestClient::readResponse(String* response) {
// an http request ends with a blank line
boolean currentLineIsBlank = true;
boolean httpBody = false;
boolean inStatus = false;
char statusCode[4];
int i = 0;
int code = 0;
if(response == NULL){
HTTP_DEBUG_PRINT("HTTP: NULL RESPONSE POINTER: \n");
}else{
HTTP_DEBUG_PRINT("HTTP: NON-NULL RESPONSE POINTER: \n");
}
HTTP_DEBUG_PRINT("HTTP: RESPONSE: \n");
while (client.connected()) {
HTTP_DEBUG_PRINT(".");
if (client.available()) {
HTTP_DEBUG_PRINT(",");
char c = client.read();
HTTP_DEBUG_PRINT(c);
if(c == ' ' && !inStatus){
inStatus = true;
}
if(inStatus && i < 3 && c != ' '){
statusCode[i] = c;
i++;
}
if(i == 3){
statusCode[i] = '\0';
code = atoi(statusCode);
}
//only write response if its not null
if(httpBody){
if(response != NULL) response->concat(c);
}
if (c == '\n' && httpBody){
HTTP_DEBUG_PRINT("HTTP: return readResponse2\n");
return code;
}
if (c == '\n' && currentLineIsBlank) {
httpBody = true;
}
if (c == '\n') {
// you're starting a new lineu
currentLineIsBlank = true;
}
else if (c != '\r') {
// you've gotten a character on the current line
currentLineIsBlank = false;
}
}
}
HTTP_DEBUG_PRINT("HTTP: return readResponse3\n");
return code;
}
int RestClient::getResponse() {
this->requestStart = millis();
// an http request ends with a blank line
boolean currentLineIsBlank = true;
boolean httpBody = false;
boolean inStatus = false;
// clear response string:
this->responseBody = "";
char statusCode[4];
int i = 0;
int code = 0;
HTTP_DEBUG_PRINT("HTTP: RESPONSE: \n");
while (client->connected()) {
// HTTP_DEBUG_PRINT(".");
if (client->available()) {
// HTTP_DEBUG_PRINT(",");
char c = client->read();
HTTP_DEBUG_PRINT(c);
if(c == ' ' && !inStatus){
inStatus = true;
}
if(inStatus && i < 3 && c != ' '){
statusCode[i] = c;
i++;
}
if(i == 3){
statusCode[i] = '\0';
code = atoi(statusCode);
}
if(httpBody){
// add this char tot the responseBody
this->responseBody += c;
}
else
{
if (c == '\n' && currentLineIsBlank) {
httpBody = true;
}
if (c == '\n') {
// you're starting a new line
currentLineIsBlank = true;
}
else if (c != '\r') {
// you've gotten a character on the current line
currentLineIsBlank = false;
}
}
} else {
// there is a condition where client connects
// and available() always <= 0. So timeout is here to catch that:
if (millis() - this->requestStart > this->timeout) return 0;
}
}
HTTP_DEBUG_PRINT("HTTP: return getResponse3\n");
return code;
}