client.c

This is a basic client API example, demonstrating how to handle streaming and non-streaming calls.

To run with the default URI: ./build/examples/client/example-client To specify the URI: ./build/examples/client/example-client unix://test2.sock Note that the unix domain socket example requires that client and server be run from the same directory specifying the same socket.

/*
 * Copyright 2017 Two Pore Guys, Inc.
 * All rights reserved
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted providing that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 */

#include <stdio.h>
#include <stdlib.h>
#include <inttypes.h>
#include <unistd.h>
#include <glib.h>
#include <errno.h>
#include <string.h>
#include <rpc/object.h>
#include <rpc/client.h>

int
main(int argc, const char *argv[])
{
    rpc_client_t client;
    rpc_connection_t conn;
    rpc_object_t result;
    rpc_call_t call;
    const char *buf;
    int64_t len;
    int64_t num;
    int cnt = 0;

    if (argc > 1)
        client = rpc_client_create(argv[1], 0);
    else
        client = rpc_client_create("tcp://127.0.0.1:5000", 0);
    if (client == NULL) {
        result = rpc_get_last_error();
        fprintf(stderr, "cannot connect: %s\n",
            rpc_error_get_message(result));
        return (1);
    }

    conn = rpc_client_get_connection(client);
    result = rpc_connection_call_simple(conn, "hello", "[s]", "world");
    printf("result = %s\n", rpc_string_get_string_ptr(result));
    rpc_release(result);

    result = rpc_connection_call_simple(conn, "hello", "[s]", "world");
    printf("result = %s\n", rpc_string_get_string_ptr(result));
    rpc_release(result);

    if (rpc_connection_has_credentials(conn)) {
        fprintf(stderr, "Remote pid is %d\n",
            (int)rpc_connection_get_remote_pid(conn));
    }

        call = rpc_connection_call(conn, NULL, NULL, "stream", rpc_array_create(), NULL);
        if (call == NULL) {
                fprintf(stderr, "Stream call failed\n");
                rpc_client_close(client);
                return (1);
        }

        rpc_call_set_prefetch(call, 10);

        for (;;) {
                rpc_call_wait(call);

                switch (rpc_call_status(call)) {
        case RPC_CALL_STREAM_START:
            rpc_call_continue(call, false);
            break;

        case RPC_CALL_MORE_AVAILABLE:
            result = rpc_call_result(call);
            rpc_object_unpack(result, "[s, i, i]",
                &buf, &len, &num);

            cnt++;
            fprintf(stderr,
                "frag = %s, len = %" PRId64 ", num = %" PRId64 ","
                "cnt = %d\n", buf, len, num, cnt);

            g_assert(len == (int)strlen(buf));
            rpc_call_continue(call, false);
            break;

        case RPC_CALL_DONE:
        case RPC_CALL_ENDED:
            fprintf(stderr, "ENDED at %d\n", cnt);
            goto done;

        case RPC_CALL_ERROR:
            fprintf(stderr, "ERRORED out\n");
            goto done;

        case RPC_CALL_ABORTED:
            fprintf(stderr, "ABORTED at %d\n", cnt);
            goto done;

        default:
            break;
                }
        }

done:
        fprintf(stderr, "CLOSING client conn %p, cnt = %d\n", conn, cnt);

    rpc_client_close(client);
    return (0);
}