Socket programming in C using http post

http://www.devpia.com/MAEUL/Contents/Detail.aspx?BoardID=50&MAEULNo=20&no=538935&ref=538935

sock = socket(PF_INET, SOCK_STREAM, 0); if(sock == INVALID_SOCKET) ErrorHandling("socket() error"); memset(&servAddr, 0, sizeof(servAddr)); servAddr.sin_family = AF_INET; servAddr.sin_addr.s_addr = inet_addr(" 아이피 "); servAddr.sin_port = htons(atoi("80")); if (connect(sock, (SOCKADDR *) &servAddr, sizeof(servAddr)) == SOCKET_ERROR ) ErrorHandling("connect() error"); strcpy(message, "GET 요청파일 HTTP/1.1\n\n"); send(sock, message, strlen(message), 0); 위의 코드로 이런저런 싸이트에 접속해서 html화일을 전송받고 있는데요. GET 방식까지는 쉽게 성공했습니다. 그런데 POST방식은 어떻게 해야할지.... post 방식으로 요청을 해야하는 html화일을 받기위한 요청을 하는 코드가 궁금합니다. 원래 싸이트 에서는 아래와 같은 자바스크립트로 전송 요청을 하는데요. <meta http-equiv="Content-Type" content="text/html; charset=euc-kr"> <META HTTP-EQUIV="Pragma" CONTENT="no-cache"> <META HTTP-EQUIV="Cache-control" CONTENT="no-cache"> <META HTTP-EQUIV="Expires" CONTENT="0"> document.docform.deptname.value = a[0]; document.docform.deptcode.value = a[1]; document.docform.classname.value = a[2]; document.docform.yundo.value = cur_yyyy+1; document.docform.hakki.value = 22; document.docform.action = "list.asp"; document.docform.submit(); 제가 위의 소스를 어떻게 수정하면 같은 역활을 하게 만들수 있을까요?

http://www.borlandforum.com/impboard/impboard.dll?action=read&db=bcb_qna&no=60454

@@ 유닉스 C 에서 작성한 프로그램 http_post5.c #include <stdio.h> #include <stdlib.h> #include <string.h> #include <unistd.h> #include <arpa inet.h=""> #include <sys types.h=""> #include <sys socket.h=""> void error_handling(char *message); int main( int argc, char **argv) { int sock; int str_len, i; struct sockaddr_in serv_addr; char msg1[] ="par=9"; // char msg2[] =" I am so happy!!!"; char message[1024]; char buff[1024*2]; //버퍼 초기화 2048 memset(buff, 0x00, sizeof(buff)); // 소켓생성 sock= socket(PF_INET, SOCK_STREAM, 0); printf("소켓생성...\n"); if( sock == -1) error_handling("socket() error "); memset(&serv_addr , 0 , sizeof(serv_addr)); serv_addr.sin_family = AF_INET; serv_addr.sin_addr.s_addr = inet_addr("210.109.111.214"); serv_addr.sin_port= htons(80); // 서버 연결요청 printf("서버연결요청...\n"); if( connect(sock,(struct sockaddr*) &serv_addr, sizeof(serv_addr)) == -1) error_handling("connect error"); sprintf(buff, "POST /test/print.jsp HTTP/1.0\r\n" "User-agent: Mozilla\r\n" "Referer: http://210.109.111.214:80 /test\f\c_http4.asp\r\n" "Content-type: application/x-www-form-urlencoded\r\n" "Content-length: %d\r\n" "\r\n%s\r\n", strlen(msg1), msg1); write(sock, buff, strlen(buff)); for( i = 0 ; i < 100 ; i++) { str_len = read(sock , message , sizeof(message) -1); message[str_len]= 0; printf("서버로부터 : %s \n", message ); } close(sock); return 0; } void error_handling(char *message) { fputs(message, stderr); fputc('\n' , stderr); exit(1); }</sys></sys></arpa></unistd.h></string.h></stdlib.h></stdio.h>

http://stackoverflow.com/questions/16143895/socket-programming-in-c-using-http-post

#ifdef WIN32 #include <winsock2.h> #include <ws2tcpip.h> #include <windows.h> #else #include <sys/types.h> #include <sys/socket.h> #include <netinet/in.h> #include <arpa/inet.h> #include <unistd.h> #include <sys/wait.h> #include <netdb.h> #include <assert.h> #endif #include <stdio.h> #include <stdlib.h> #include <errno.h> #include <string.h> #include <signal.h> #include <ctype.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)); memset(&servaddr, 0, 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); }

http://souptonuts.sourceforge.net/code/http_post.c.html

/* 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); }