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Wednesday, January 26, 2011

Getting twitter feed while Twitter is blocked

I don't know if u know what is going on in Egypt but there is lots of problems with the government and they blocked twitter.

anyways, I think I do know how to get over it, the matter is simple, try to get any of twitter's IPs' and then connect to it using the IP

The problem with it is, the browsers will use it The IP as a Host in the HTTP header, I have tried with many plugin to use something else but I always get "the redirect code" but when I did telnet on the IP and Wrote the http my self it did work :D "how do write HTTP :D"
anyways, I looked for a simple client and I tried something and it is 100% working



#define PORT 80

#define HOST "128.121.243.228"

#define DIRSIZE 8192000

#define HTTP_HEADER "GET /statuses/user_timeline/Neo_4583.json HTTP/1.1\nHost: twitter.com\n\n"


char* strToSend = HTTP_HEADER;

char hostname[100];

char dir[DIRSIZE];

int sd;

struct sockaddr_in pin;

struct hostent *hp;

strcpy(hostname,HOST);


if ((hp = gethostbyname(hostname)) == 0) {

exit(1);

}

memset(&pin, 0, sizeof(pin));

pin.sin_family = AF_INET;

pin.sin_addr.s_addr = ((struct in_addr *)(hp->h_addr))->s_addr;

pin.sin_port = htons(PORT);

if ((sd = socket(AF_INET, SOCK_STREAM, 0)) == -1) {

perror("socket");

exit(1);

}

if (connect(sd,(struct sockaddr *) &pin, sizeof(pin)) == -1) {

perror("connect");

exit(1);

}


if (send(sd, strToSend, strlen(strToSend), 0) == -1) {

exit(1);

}

if (recv(sd, dir, DIRSIZE, MSG_WAITALL) == -1) {

exit(1);

}else {

// The data is ready to be served

printf("%s\n", dir);

}

close(sd);



"Next step, modify the HTTP header in the browser so it works correctly with twitter"
Enjoy the code
Thanks for your time

BR
Ahmed Essam

4 comments:

lxrman said...

very good job , put i don't really get it..does this code try to retrieve a different IP from twitter instead of the blocked ip? or do you try to force the browser to use the ip 128.121.243.228 insted of the domain in the request? i think the code need more explaining

ahmedre said...

nice - simpler way is this:
telnet 128.121.243.228 80

you'll get:
Trying 128.121.243.228...
Connected to 128.121.243.228.
Escape character is '^]'.

type:
GET / HTTP/1.0
(hit enter twice)

Ahmed Essam said...

lxrman: If u have twitter IP address and u managed to get connection with it then it is fine but the problem with the browser that it must added the host which will be the ip, the server will send 302 message to forward the browser to twitter.com which is blocked


ahmedre: I have a little file on desktop "text (has some message for different protocols weird but it saved me many times.) and python" but unfortunately people don't understand python so I wrote it in c :D

Mohammed Hewedy said...

It is *nix C, correct?

I never do network programming in C on Linux but I feel the lib names (all in lower case) as opposite to the ugly win APIs (all in UPPER CASE) .. :)

Good work BTW, but I think you need to refer to the hash includes + the platform..

Thanks

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