source: rtos_arduino/trunk/arduino_lib/libraries/Ethernet2/src/Twitter.cpp@ 136

/*
  Twitter.cpp - Arduino library to Post messages to Twitter using OAuth.
  Copyright (c) NeoCat 2010-2011. All right reserved.
  
  This library is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 
 */

// ver1.2 - Use <string.h>
// ver1.3 - Support IDE 1.0

#include <string.h>
#include "Twitter.h"

#define LIB_DOMAIN "arduino-tweet.appspot.com"

#if defined(ARDUINO) && ARDUINO < 100
static uint8_t server[] = {0,0,0,0}; // IP address of LIB_DOMAIN
Twitter::Twitter(const char *token) : client(server, 80), token(token)
{
}
#else
Twitter::Twitter(const char *token) : token(token)
{
}
#endif

bool Twitter::post(const char *msg)
{
#if defined(ARDUINO) && ARDUINO < 100
        DNSError err = EthernetDNS.resolveHostName(LIB_DOMAIN, server);
        if (err != DNSSuccess) {
                return false;
        }
#endif
        parseStatus = 0;
        statusCode = 0;
#if defined(ARDUINO) && ARDUINO < 100
        if (client.connect()) {
#else
        if (client.connect(LIB_DOMAIN, 80)) {
#endif
                client.println("POST http://" LIB_DOMAIN "/update HTTP/1.0");
                client.print("Content-Length: ");
                client.println(strlen(msg)+strlen(token)+14);
                client.println();
                client.print("token=");
                client.print(token);
                client.print("&status=");
                client.println(msg);
        } else {
                return false;
        }
        return true;
}

bool Twitter::checkStatus(Print *debug)
{
        if (!client.connected()) {
                if (debug)
                        while(client.available())
                                debug->print((char)client.read());
                client.flush();
                client.stop();
                return false;
        }
        if (!client.available())
                return true;
        char c = client.read();
        if (debug)
                debug->print(c);
        switch(parseStatus) {
        case 0:
                if (c == ' ') parseStatus++; break;  // skip "HTTP/1.1 "
        case 1:
                if (c >= '0' && c <= '9') {
                        statusCode *= 10;
                        statusCode += c - '0';
                } else {
                        parseStatus++;
                }
        }
        return true;
}

int Twitter::wait(Print *debug)
{
        while (checkStatus(debug));
        return statusCode;
}