如何接收HTTP响应

Question

char url[]= "GET " PATH "\r\n"
"Host: " HOST "\r\n"
"User-Agent: Mozilla/5.0\r\n"
"\r\n";    
write(sfd, url, strlen(url)); // write(fd, char[]*, len);  
bzero(buffer, BUFFER_SIZE);
while(read(sfd, buffer, 1024 - 1) != 0){
    printf("%s", BUFFER_SIZE);
    bzero(buffer, 1024);
}

Result:

I'm writing a HTTP Client using Socket. The problem here is the read() func only return HTTP respond body. But i want it to fetch http respond header also. I don't know what i'm doing wrong here.

Answer 1

The problem is that you are not specifying an HTTP version in the GET request, so the server will think you are a pre-1.0 client and won't send any headers to you.

Do this instead:

char url[]= "GET " PATH " HTTP/1.0\r\n" ...

Or:

char url[]= "GET " PATH " HTTP/1.1\r\n" ...

And then the server will give you headers.