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HTTP_RECVFIELD(3) libdill Library Functions HTTP_RECVFIELD(3) NAME http_recvfield - receives HTTP field from the peer SYNOPSIS #include <libdill.h> int http_recvfield( int s, char* name, size_t namelen, char* value, size_t valuelen, 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 receives an HTTP field from the peer. s: HTTP socket handle. name: Buffer to store name of the field. namelen: Size of the name buffer. value: Buffer to store value of the field. valuelen: Size of the value buffer. 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. • EMSGSIZE: The data won't fit into the supplied buffer. • ENOTSUP: The handle does not support this operation. • EPIPE: There are no more fields to receive. • 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_recvrequest(3) http_recvstatus(3) http_sendfield(3) http_sendrequest(3) http_sendstatus(3) now(3) libdill HTTP_RECVFIELD(3)
NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | EXAMPLE | SEE ALSO
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