Arduino code for posting messages to im.kayac.com

gistfile1.cpp

/**
    Copyright: (c) SAEKI Yoshiyasu
    License   : MIT-style license
                <http://www.opensource.org/licenses/mit-license.php>
    last updated: 2010/12/03
**/

#include <SPI.h>
#include <Ethernet.h>
#include <string.h>

byte mac[] = {0x00, 0x01, 0x02, 0x03, 0x04, 0x05};
byte ip[] = {192, 168, 254, 100};
byte imkayaccom_server[] = {202, 218, 201, 26};
char imkayaccom_username[] = "YOUR_USERNAME";
char imkayaccom_password[] = "YOUR_PASSWORD";
char message_body[256];
char message[200];
char message_length[4];

Client client(imkayaccom_server, 80);

void setup() {
  Ethernet.begin(mac, ip);
  Serial.begin(9600);
  delay(1000);

  if (client.connect()) {
    client.print("POST /api/post/");
    client.print(imkayaccom_username);
    client.println(" HTTP/1.0");
    client.println("Host: im.kayac.com");
    client.println("Content-Type: application/x-www-form-urlencoded");
    strcat(message_body, "message=");
    urlencode(message, "Hello. I'm your Arduino.");
    strcat(message_body, message);
    strcat(message_body, "&password=");
    strcat(message_body, imkayaccom_password);
    sprintf(message_length, "%d", strlen(message_body));
    client.print("Content-Length: ");
    client.println(message_length);
    client.println();
    client.println(message_body);
  }
}

void loop()
{
  if (client.available()) {
    char c = client.read();
    Serial.print(c);
  }

  if (!client.connected()) {
    Serial.println();
    Serial.println("disconnecting.");
    client.stop();

    for(;;)
      ;
  }
}

void urlencode(char* dest, char* src) {
  int i;
  for(i = 0; i < strlen(src); i++) {
    char c = src[i];
    if ((c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z') ||
        (c >= '0' && c <= '9') ||
        c == '-' || c == '_' || c == '.' || c == '~') {
      char t[2];
      t[0] = c; t[1] = '\0';
      strcat(dest, t);
    } else {
      char t[4];
      snprintf(t, sizeof(t), "%%%02x", c & 0xff);
      strcat(dest, t);
    }
  }
}