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NAME

       ne_request_create, ne_request_dispatch, ne_request_destroy - low-level
       HTTP request handling

SYNOPSIS

       #include <ne_request.h>

       ne_request *ne_request_create(ne_session *session, const char *method,
                                     const char *path);

       int ne_request_dispatch(ne_request *req);

       void ne_request_destroy(ne_request *req);

DESCRIPTION

       An HTTP request, represented by the ne_request type, specifies that
       some operation is to be performed on some resource. The
       ne_request_create function creates a request object, specifying the
       operation in the method parameter. The location of the resource is
       determined by the server in use for the session given by the sess
       parameter, combined with the path parameter.

       The path string used must conform to the abs_path definition given in
       RFC2396, with an optional "?query" part, and must be URI-escaped by the
       caller (for instance, using ne_path_escape). If the string comes from
       an untrusted source, failure to perform URI-escaping results in a
       security vulnerability.

       To dispatch a request, and process the response, the
       ne_request_dispatch function can be used. An alternative is to use the
       (more complex, but more flexible) combination of the ne_begin_request,
       ne_end_request, and ne_read_response_block functions; see
       ne_begin_request.

       To add extra headers in the request, the functions
       ne_add_request_header and ne_print_request_header can be used. To
       include a message body with the request, one of the functions
       ne_set_request_body_buffer, ne_set_request_body_fd, or
       ne_set_request_body_provider can be used.

       The return value of ne_request_dispatch indicates merely whether the
       request was sent and the response read successfully. To discover the
       result of the operation, ne_get_status, along with any processing of
       the response headers and message body.

       A request can only be dispatched once: calling ne_request_dispatch more
       than once on a single ne_request object produces undefined behaviour.
       Once all processing associated with the request object is complete, use
       the ne_request_destroy function to destroy the resources associated
       with it. Any subsequent use of the request object produces undefined
       behaviour.

RETURN VALUE

       The ne_request_create function returns a pointer to a request object
       (and never NULL).

       The ne_request_dispatch function returns zero if the request was
       dispatched successfully, and a non-zero error code otherwise.

ERRORS

       NE_ERROR
           Request failed (see session error string)

       NE_LOOKUP
           The DNS lookup for the server (or proxy server) failed.

       NE_AUTH
           Authentication failed on the server.

       NE_PROXYAUTH
           Authentication failed on the proxy server.

       NE_CONNECT
           A connection to the server could not be established.

       NE_TIMEOUT
           A timeout occurred while waiting for the server to respond.

EXAMPLE

       An example of applying a MKCOL operation to the resource at the
       location http://www.example.com/foo/bar/:

           ne_session *sess = ne_session_create("http", "www.example.com", 80);
           ne_request *req = ne_request_create(sess, "MKCOL", "/foo/bar/");
           if (ne_request_dispatch(req)) {
              printf("Request failed: %s\n", ne_get_error(sess));
           }
           ne_request_destroy(req);

SEE ALSO

       ne_get_error, ne_set_error, ne_get_status, ne_add_request_header,
       ne_set_request_body_buffer.

AUTHOR

       Joe Orton <neon@webdav.org>
           Author.

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