TwitterExample.cpp

00001 /*
00002   Update: 21-06-2010
00003   The basic authentication service for twitter is going down at the end of the week.
00004   To continue using that program, the code has been updated to use http://supertweet.net which acts as an API proxy.
00005   Simply visit the website to setup your twitter account for this API.
00006   See: http://www.supertweet.net/about/documentation
00007 */
00008 
00009 #include "mbed.h"
00010 #include "EthernetNetIf.h"
00011 #include "HTTPClient.h"
00012 #include "TextLCD.h"
00013 
00014 TextLCD lcd(p24, p25, p26, p27, p28, p29); // rs, e, d0-d3
00015 //TextLCD     lcd( p24, p26, p27, p28, p29, p30 ); // rs, e, d0-d3
00016 
00017 EthernetNetIf eth; 
00018 
00019 int main() {
00020 
00021   printf("Init\n");                           lcd.locate( 0, 0 );   lcd.printf("Init           ");
00022   printf("\r\nSetting up...\r\n");            lcd.locate( 0, 0 );   lcd.printf("Setting up     ");
00023   
00024   EthernetErr ethErr = eth.setup();
00025   if(ethErr)
00026   {
00027     printf("Error %d in setup.\n", ethErr);   lcd.locate( 0, 0 );   lcd.printf("error %d", ethErr);
00028     return -1;
00029   }
00030   printf("\r\nSetup OK\r\n");                 lcd.locate( 0, 0 );   lcd.printf("Setup OK       ");
00031 
00032   HTTPClient twitter;
00033   
00034   HTTPMap msg;
00035   
00036   //msg["status"] = "twitter test AAAA"; //A good example of Key/Value pair use with Web APIs
00037   LocalFileSystem local("local");
00038   char   s[256];
00039   FILE   *fp;
00040   
00041   printf("\r\nreading a message file.\r\n");
00042   
00043   if(NULL == (fp = fopen("/local/tweet.txt","r")) ) {
00044     printf("\r\nError: The message file cannot be accessed\r\n");  lcd.locate( 0, 0 );   lcd.printf("File access error");
00045     return -1;
00046   }
00047   
00048   fgets(s,256,fp);
00049   fclose(fp);
00050   
00051   msg["status"] = s;      lcd.locate( 0, 0 );   lcd.printf("File read done ");
00052   twitter.basicAuth("USER_ID", "PASSWORD"); //We use basic authentication, replace with you account's parameters
00053   
00054   //No need to retieve data sent back by the server
00055   HTTPResult r = twitter.post("http://api.supertweet.net/1/statuses/update.xml", msg, NULL); 
00056   if( r == HTTP_OK )
00057   {
00058     printf("Tweet sent with success!\n");      lcd.locate( 0, 0 );   lcd.printf("Done           ");
00059   }
00060   else
00061   {
00062     printf("Problem during tweeting, return code %d\n", r);lcd.locate( 0, 0 );   lcd.printf("Got error      ");
00063   }
00064   
00065   return 0;
00066 
00067 }