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| HTTP_ATTACH(3) | libdill Library Functions | HTTP_ATTACH(3) |
NAME
http_attach - creates HTTP protocol on top of underlying socketSYNOPSIS
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#include <libdill.h> int http_attach( int s);
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 implementation handles only the request/response exchange. Whatever comes after that must be handled by a different protocol.
This function instantiates HTTP protocol on top of the underlying protocol.
s: Handle of the underlying socket. It must be a bytestream protocol.
The socket can be cleanly shut down using http_detach function.
This function is not available if libdill is compiled with --disable-sockets option.
RETURN VALUE
In case of success the function returns newly created socket handle. In case of error it returns -1 and sets errno to one of the values below.ERRORS
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- EBADF: Invalid handle.
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- EMFILE: The maximum number of file descriptors in the process are already open.
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- ENFILE: The maximum number of file descriptors in the system are already open.
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- ENOMEM: Not enough memory.
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- ENOTSUP: The handle does not support this operation.
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- EPROTO: Underlying socket is not a bytestream socket.
EXAMPLE
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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
hclose(3) http_attach_mem(3) http_detach(3) http_done(3) http_recvfield(3) http_recvrequest(3) http_recvstatus(3) http_sendfield(3) http_sendrequest(3) http_sendstatus(3)| libdill |
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