Note : The following source will only work with non-chunked encoding servers...The servers which have enabled the encoding set to chunked will not properly work with this source... And I assume basic knowledge of SOCKETS UNIX API and C language as prerequisites... Source Code: #include<stdio.h> #include<netdb.h> #include<sys/types.h> #include<sys/socket.h> #include<arpa/inet.h> #include<string.h> #define RESPONSE_RECV_LIMIT 3000 #define SOURCE_START_IDENTIFIER "<!DOCTYPE" #define SOURCE_START_IDENTIFIER2 "<html>" //this is the name of the identifier that the #define FILENAME "/" // ENTER THE FILENAME HERE #define PORT "80" // default for web-browsers int main(int argc , char *argv[]) { if(argc != 2) { printf("Usage %s : hostname\n",argv[0]); return(0); } char response[RESPONSE_RECV_LIMIT+1]; // + 1 is for null char *source; int sockfd,newfd,err; char ip[INET6_ADDRSTRLEN]; struct addrinfo *p,hints,*res; int len,len_s; int yes=1; struct sockaddr_storage their_addr; socklen_t addr_size; void *addr; char *ver; char request[100]; sprintf(request,"GET %s HTTP/1.1\r\nHost: %s\r\n\r\n",FILENAME,argv[1]); // print the request we are making printf("%s\n\n",request); memset(&hints,0,sizeof hints); hints.ai_socktype=SOCK_STREAM; hints.ai_family=AF_UNSPEC; if ((err = getaddrinfo(argv[1],PORT, &hints, &res)) != 0) { fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(err)); return 1; } for(p=res;p!=NULL;p=p->ai_next) { if( ( sockfd = socket(p->ai_family,p->ai_socktype,p->ai_protocol) ) == -1) { printf("Socket error !!!\n"); return(0); } if (connect(sockfd, p->ai_addr, p->ai_addrlen) == -1) { close(sockfd); perror("client: connect"); continue; } } if(send(sockfd,request,strlen(request),0) < strlen(request)) { perror("Send Error!!\n"); } freeaddrinfo(res); if( recv(sockfd,response,RESPONSE_RECV_LIMIT,0) == 0 ) { perror("Recv : "); return(1); } close(sockfd); // we dont need it any more // printf("%s",response); // for debugging purposes source = strstr(response,SOURCE_START_IDENTIFIER); if(source == NULL) { source = strstr(response,SOURCE_START_IDENTIFIER2); } printf("%s\n",source); return(0); } Compiling :- Code: gcc getSource.c -o getSource Sample I am providing sample with apache on my server … You can see the settings here:- Code: aneesh@aneesh-laptop:~/articles/C/getSrc$ telnet 127.0.0.1 80 Trying 127.0.0.1... Connected to 127.0.0.1. Escape character is '^]'. GET / HTTP/1.1 HTTP/1.1 400 Bad Request Date: Mon, 31 Jan 2011 16:04:45 GMT Server: Apache/2.2.14 (Ubuntu) Vary: Accept-Encoding Content-Length: 301 Connection: close Content-Type: text/html; charset=iso-8859-1 Output :- Code: aneesh@aneesh-laptop:~/articles/C/getSrc$ ./getSource 127.0.0.1 GET / HTTP/1.1 Host: 127.0.0.1 <html><body><h1>It works!</h1> <p>This is the default web page for this server.</p> <p>The web server software is running but no content has been added, yet.</p> </body></html> Hey guyz stay tuned as i am trying hard to add Chunked data functionality to it and maybe i'll write another article on it ...
