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HTTP_SENDREQUEST(3) libdill Library Functions HTTP_SENDREQUEST(3) NAME http_sendrequest - sends initial HTTP request SYNOPSIS #include <libdill.h> int http_sendrequest( int s, const char* command, const char* resource, int64_t deadline); DESCRIPTION WARNING: This is experimental functionality and the API may change in the future. HTTP is an application-level protocol described in RFC 7230. This im- plementation handles only the request/response exchange. Whatever comes after that must be handled by a different protocol. This function sends an initial HTTP request with the specified command and resource. For example, if command is GET and resource is /in- dex.html the line sent will look like this: GET /index.html HTTP/1.1 s: HTTP socket handle. command: HTTP command, such as GET. resource: HTTP resource, such as /index.html. deadline: A point in time when the operation should time out, in mil- liseconds. Use the now function to get your current point in time. 0 means immediate timeout, i.e., perform the operation if possible or re- turn without blocking if not. -1 means no deadline, i.e., the call will block forever if the operation cannot be performed. This function is not available if libdill is compiled with --dis- able-sockets option. RETURN VALUE In case of success the function returns 0. In case of error it returns -1 and sets errno to one of the values below. ERRORS • EBADF: Invalid handle. • ECANCELED: Current coroutine was canceled. • ECONNRESET: Broken connection. • EINVAL: Invalid argument. • ENOTSUP: The handle does not support this operation. • ETIMEDOUT: Deadline was reached. EXAMPLE int s = tcp_connect(&addr, -1); s = http_attach(s); http_sendrequest(s, "GET", "/", -1); http_sendfield(s, "Host", "www.example.org", -1); http_done(s, -1); char reason[256]; http_recvstatus(s, reason, sizeof(reason), -1); while(1) { char name[256]; char value[256]; int rc = http_recvfield(s, name, sizeof(name), value, sizeof(value), -1); if(rc == -1 && errno == EPIPE) break; } s = http_detach(s, -1); tcp_close(s); SEE ALSO http_attach(3) http_attach_mem(3) http_detach(3) http_done(3) http_recvfield(3) http_recvrequest(3) http_recvstatus(3) http_send- field(3) http_sendstatus(3) now(3) libdill HTTP_SENDREQUEST(3)
NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | EXAMPLE | SEE ALSO
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