/* http_post_simple - do a POST to an HTTP URL and return the values
Copyright GPL 2003 by Mike Chirico <mchirico@users.sourceforge.net>
Updated: Sun Jun 13 13:53:14 EDT 2004
A few things to note with this example:
.. note the \r\n .. it needs a carrage return line feed
"POST /test.php HTTP/1.0\r\n"
"Host: souptonuts.sourceforge.net\r\n"
souptonuts.sourceforge.net ip address is 66.35.250.209
but use the dns name "souptonuts.sourceforge.net"
A note on Content-length
"Content-length: 36\r\n\r\n"
->"mode=login&user=test&password=test\r\n"<-- 36 characters
36 is the length of the string "mode=login&user=test&password=test\r\n"
If the string is changed, then length must be adjusted.
Reference:
http://souptonuts.sourceforge.net/chirico/test.php
http://souptonuts.sourceforge.net/code/test.php.html
Download:
http://prdownloads.sourceforge.net/cpearls/spider.tar.gz?download
*/
#include <arpa/inet.h>
#include <assert.h>
#include <errno.h>
#include <netinet/in.h>
#include <signal.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/wait.h>
#include <netdb.h>
#include <unistd.h>
#define SA struct sockaddr
#define MAXLINE 4096
#define MAXSUB 200
#define LISTENQ 1024
extern int h_errno;
ssize_t process_http(int sockfd, char *host, char *page, char *poststr)
{
char sendline[MAXLINE + 1], recvline[MAXLINE + 1];
ssize_t n;
snprintf(sendline, MAXSUB,
"POST %s HTTP/1.0\r\n"
"Host: %s\r\n"
"Content-type: application/x-www-form-urlencoded\r\n"
"Content-length: %d\r\n\r\n"
"%s", page, host, strlen(poststr), poststr);
write(sockfd, sendline, strlen(sendline));
while ((n = read(sockfd, recvline, MAXLINE)) > 0) {
recvline[n] = '\0';
printf("%s", recvline);
}
return n;
}
int main(void)
{
int sockfd;
struct sockaddr_in servaddr;
char **pptr;
//********** You can change. Puy any values here *******
char *hname = "souptonuts.sourceforge.net";
char *page = "/chirico/test.php";
char *poststr = "mode=login&user=test&password=test\r\n";
//*******************************************************
char str[50];
struct hostent *hptr;
if ((hptr = gethostbyname(hname)) == NULL) {
fprintf(stderr, " gethostbyname error for host: %s: %s",
hname, hstrerror(h_errno));
exit(1);
}
printf("hostname: %s\n", hptr->h_name);
if (hptr->h_addrtype == AF_INET
&& (pptr = hptr->h_addr_list) != NULL) {
printf("address: %s\n",
inet_ntop(hptr->h_addrtype, *pptr, str,
sizeof(str)));
} else {
fprintf(stderr, "Error call inet_ntop \n");
}
sockfd = socket(AF_INET, SOCK_STREAM, 0);
bzero(&servaddr, sizeof(servaddr));
servaddr.sin_family = AF_INET;
servaddr.sin_port = htons(80);
inet_pton(AF_INET, str, &servaddr.sin_addr);
connect(sockfd, (SA *) & servaddr, sizeof(servaddr));
process_http(sockfd, hname, page, poststr);
close(sockfd);
exit(0);
}
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Mike Chirico, a father of triplets (all girls) lives outside of
Philadelphia, PA, USA. He has worked with Linux since 1996, has a Masters
in Computer Science and Mathematics from Villanova University, and has
worked in computer-related jobs from Wall Street to the University of
Pennsylvania. His hero is Paul Erdos, a brilliant number theorist who was
known for his open collaboration with others.
Mike's notes page is souptonuts. For
open source consulting needs, please send an email to
mchirico@gmail.com. All consulting work must include a donation to
SourceForge.net.
