c/c++语言开发共享如何使用C套接字编程下载文件

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 #include #include #include #include // www.axmag.com/download/pdfurl-guide.pdf int main(int argc , char *argv[]) { int socket_desc; char *message; char server_reply[10000]; char *filename = "file.pdf"; int total_len = 0; int file_len = 99352; int len; FILE *file = NULL; struct sockaddr_in server; //Create socket socket_desc = socket(AF_INET , SOCK_STREAM , 0); if (socket_desc == -1) { printf("Could not create socket"); } server.sin_addr.s_addr = inet_addr("198.11.181.184"); server.sin_family = AF_INET; server.sin_port = htons( 80 ); //Connect to remote server if (connect(socket_desc , (struct sockaddr *)&server , sizeof(server)) < 0) { puts("connect error"); return 1; } puts("Connectedn"); //Send request message = "GET /download/pdfurl-guide.pdf HTTP/1.1rnHost: www.axmag.comrnrn Connection: keep-alivernrn Keep-Alive: 300rn"; if( send(socket_desc , message , strlen(message) , 0) < 0) { puts("Send failed"); return 1; } puts("Data Sendn"); remove(filename); file = fopen(filename, "ab"); if(file == NULL){ printf("File could not opened"); } while(1) { int received_len = recv(socket_desc, server_reply , sizeof server_reply , 0); if( received_len < 0 ){ puts("recv failed"); break; } total_len += received_len; //puts(server_reply); fwrite(server_reply , received_len , 1, file); printf("nReceived byte size = %dnTotal lenght = %d", received_len, total_len); if( total_len >= file_len ){ break; } } puts("Reply receivedn"); fclose(file); return 0; }