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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*
*/
// This is a re-implementation of recv.c using non-blocking/asynchronous calls.
#include "proton/message.h"
#include "proton/messenger.h"
#include "pncompat/misc_funcs.inc"
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#if EMSCRIPTEN
#include <emscripten.h>
#endif
pn_message_t * message;
pn_messenger_t * messenger;
#define check(messenger) \
{ \
if(pn_messenger_errno(messenger)) \
{ \
die(__FILE__, __LINE__, pn_error_text(pn_messenger_error(messenger))); \
} \
} \
void die(const char *file, int line, const char *message)
{
fprintf(stderr, "%s:%i: %s\n", file, line, message);
exit(1);
}
void usage(void)
{
printf("Usage: recv [options] <addr>\n");
printf("-c \tPath to the certificate file.\n");
printf("-k \tPath to the private key file.\n");
printf("-p \tPassword for the private key.\n");
printf("<addr>\tAn address.\n");
exit(0);
}
void process(void) {
while(pn_messenger_incoming(messenger))
{
pn_messenger_get(messenger, message);
check(messenger);
{
pn_tracker_t tracker = pn_messenger_incoming_tracker(messenger);
char buffer[1024];
size_t buffsize = sizeof(buffer);
const char* subject = pn_message_get_subject(message);
pn_data_t* body = pn_message_body(message);
pn_data_format(body, buffer, &buffsize);
printf("Address: %s\n", pn_message_get_address(message));
printf("Subject: %s\n", subject ? subject : "(no subject)");
printf("Content: %s\n", buffer);
pn_messenger_accept(messenger, tracker, 0);
}
}
}
#if EMSCRIPTEN // For emscripten C/C++ to JavaScript compiler.
void pump(int fd, void* userData) {
while (pn_messenger_work(messenger, 0) >= 0) {
process();
}
}
void onclose(int fd, void* userData) {
process();
}
void onerror(int fd, int errno, const char* msg, void* userData) {
printf("error callback fd = %d, errno = %d, msg = %s\n", fd, errno, msg);
}
#endif
int main(int argc, char** argv)
{
char* certificate = NULL;
char* privatekey = NULL;
char* password = NULL;
char* address = (char *) "amqp://~0.0.0.0";
int c;
message = pn_message();
messenger = pn_messenger(NULL);
pn_messenger_set_blocking(messenger, false); // Needs to be set non-blocking to behave asynchronously.
opterr = 0;
while((c = getopt(argc, argv, "hc:k:p:")) != -1)
{
switch(c)
{
case 'h':
usage();
break;
case 'c': certificate = optarg; break;
case 'k': privatekey = optarg; break;
case 'p': password = optarg; break;
case '?':
if (optopt == 'c' ||
optopt == 'k' ||
optopt == 'p')
{
fprintf(stderr, "Option -%c requires an argument.\n", optopt);
}
else if(isprint(optopt))
{
fprintf(stderr, "Unknown option `-%c'.\n", optopt);
}
else
{
fprintf(stderr, "Unknown option character `\\x%x'.\n", optopt);
}
return 1;
default:
abort();
}
}
if (optind < argc)
{
address = argv[optind];
}
/* load the various command line options if they're set */
if(certificate)
{
pn_messenger_set_certificate(messenger, certificate);
}
if(privatekey)
{
pn_messenger_set_private_key(messenger, privatekey);
}
if(password)
{
pn_messenger_set_password(messenger, password);
}
pn_messenger_start(messenger);
check(messenger);
pn_messenger_subscribe(messenger, address);
check(messenger);
pn_messenger_recv(messenger, -1); // Set to receive as many messages as messenger can buffer.
#if EMSCRIPTEN // For emscripten C/C++ to JavaScript compiler.
emscripten_set_socket_error_callback(NULL, onerror);
emscripten_set_socket_open_callback(NULL, pump);
emscripten_set_socket_connection_callback(NULL, pump);
emscripten_set_socket_message_callback(NULL, pump);
emscripten_set_socket_close_callback(NULL, onclose);
#else // For native compiler.
while (1) {
pn_messenger_work(messenger, -1); // Block indefinitely until there has been socket activity.
process();
}
#endif
return 0;
}
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