Created
August 16, 2020 10:29
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| #include <arpa/inet.h> | |
| #include <errno.h> | |
| #include <stdio.h> | |
| #include <stdlib.h> | |
| #include <strings.h> | |
| #include <sys/socket.h> | |
| #include <unistd.h> | |
| #define PORT 80 | |
| #define MAXLINE 4096 | |
| int main(int argc, char const *argv[]) { | |
| int sockfd; | |
| int sendbytes, recvbytes; | |
| struct sockaddr_in servaddr; | |
| char sendline[MAXLINE]; | |
| char recvline[MAXLINE]; | |
| if (argc != 2) { | |
| printf("usage: %s <url>", argv[0]); | |
| exit(1); | |
| } | |
| if ((sockfd = socket(AF_INET, SOCK_STREAM, 0)) < 0) { | |
| printf("error: unable to create the socket"); | |
| exit(1); | |
| } | |
| bzero(&servaddr, sizeof(servaddr)); | |
| servaddr.sin_family = AF_INET; | |
| servaddr.sin_port = htons(PORT); | |
| if (inet_pton(AF_INET, argv[1], &servaddr.sin_addr) <= 0) { | |
| printf("error: unable to translate ip %s", argv[1]); | |
| exit(1); | |
| } | |
| if (connect(sockfd, (struct sockaddr *)&servaddr, sizeof(servaddr)) < 0) { | |
| printf("error: connection failed"); | |
| exit(1); | |
| } | |
| sprintf(sendline, "GET / HTTP/1.1\r\n\r\n"); | |
| sendbytes = strlen(sendline); | |
| if (write(sockfd, sendline, sendbytes) != sendbytes) { | |
| printf("error: write error"); | |
| exit(1); | |
| } | |
| memset(recvline, 0, MAXLINE); | |
| while ((recvbytes = read(sockfd, recvline, MAXLINE - 1)) > 0) { | |
| printf("%s", recvline); | |
| } | |
| if (recvbytes < 0) { | |
| printf("error: read error"); | |
| exit(1); | |
| } | |
| return 0; | |
| } |
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