Send HTTP response using C socket

Question

I`m trying to send HTTP response to browser

char *reply = 
"HTTP/1.1 200 OK\n"
"Date: Thu, 19 Feb 2009 12:27:04 GMT\n"
"Server: Apache/2.2.3\n"
"Last-Modified: Wed, 18 Jun 2003 16:05:58 GMT\n"
"ETag: \"56d-9989200-1132c580\"\n"
"Content-Type: text/html\n"
"Content-Length: 15\n"
"Accept-Ranges: bytes\n"
"Connection: close\n"
"\n"
"sdfkjsdnbfkjbsf";

int sd = socket(PF_INET, SOCK_STREAM, 0);

struct sockaddr_in addr;
bzero(&addr, sizeof(addr));
addr.sin_family = AF_INET;
addr.sin_port = htons(8081);
addr.sin_addr.s_addr = INADDR_ANY;

if(bind(sd,&addr,sizeof(addr))!=0)
{
    printf("bind error\n");
}

if (listen(sd, 16)!=0)
{
    printf("listen error\n");
}

for(;;)
{
    int size = sizeof(addr);
    int client = accept(sd, &addr, &size);

    if (client > 0)
    {
        printf("client connected\n");
        send(client, reply, sizeof(reply), 0);
    }
}

but my browser cant understand this, waits for a long time and then print smth strange. I guess my response is wrong, but I dont know how to fix. Any ideas?

should use strlen(reply), and add close(client)

MinhNV
– MinhNV

2019-07-03 02:51:33 +00:00
Commented Jul 3, 2019 at 2:51 — MinhNV
– MinhNV, Commented Jul 3, 2019 at 2:51
maybe you also need a \r "HTTP/1.1 200 OK\r\n"

Phil
– Phil

2023-02-13 22:10:14 +00:00
Commented Feb 13, 2023 at 22:10 — Phil
– Phil, Commented Feb 13, 2023 at 22:10

Erik · Accepted Answer · 2011-03-30 13:56:16Z

10

sizeof(reply) evaluates to the size of a char *, aka size of a pointer. Use strlen.

send(client, reply, strlen(reply), 0);

answered Mar 30, 2011 at 13:56

Erik

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1 Comment

spe Over a year ago

Damn! Stupid mistake. Thanks!

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