The C based gRPC (C++, Python, Ruby, Objective-C, PHP, C#) https://grpc.io/
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/*
*
* Copyright 2014, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "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 COPYRIGHT
* OWNER OR CONTRIBUTORS 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 <grpc/grpc.h>
#include <grpc/grpc_http.h>
#include <grpc/grpc_security.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include "src/core/support/string.h"
#include "test/core/util/test_config.h"
#include <grpc/support/alloc.h>
#include <grpc/support/cmdline.h>
#include <grpc/support/host_port.h>
#include <grpc/support/log.h>
#include <grpc/support/time.h>
#include "test/core/util/port.h"
#include "test/core/end2end/data/ssl_test_data.h"
static grpc_completion_queue *cq;
static grpc_server *server;
static int got_sigint = 0;
typedef struct {
gpr_refcount pending_ops;
gpr_intmax bytes_read;
} call_state;
static void request_call(void) {
call_state *tag = gpr_malloc(sizeof(*tag));
gpr_ref_init(&tag->pending_ops, 2);
tag->bytes_read = 0;
grpc_server_request_call_old(server, tag);
}
static void assert_read_ok(call_state *s, grpc_byte_buffer *b) {
grpc_byte_buffer_reader *bb_reader = NULL;
gpr_slice read_slice;
unsigned i;
bb_reader = grpc_byte_buffer_reader_create(b);
while (grpc_byte_buffer_reader_next(bb_reader, &read_slice)) {
for (i = 0; i < GPR_SLICE_LENGTH(read_slice); i++) {
GPR_ASSERT(GPR_SLICE_START_PTR(read_slice)[i] == s->bytes_read % 256);
s->bytes_read++;
}
gpr_slice_unref(read_slice);
}
grpc_byte_buffer_reader_destroy(bb_reader);
}
static void sigint_handler(int x) { got_sigint = 1; }
int main(int argc, char **argv) {
grpc_event *ev;
call_state *s;
char *addr_buf = NULL;
gpr_cmdline *cl;
int shutdown_started = 0;
int shutdown_finished = 0;
int secure = 0;
char *addr = NULL;
char *fake_argv[1];
#define MAX_ARGS 4
grpc_arg arge[MAX_ARGS];
grpc_arg *e;
grpc_channel_args args = {0, NULL};
grpc_http_server_page home_page = {"/", "text/html",
"<head>\n"
"<title>Echo Server</title>\n"
"</head>\n"
"<body>\n"
"Welcome to the world of the future!\n"
"</body>\n"};
GPR_ASSERT(argc >= 1);
fake_argv[0] = argv[0];
grpc_test_init(1, fake_argv);
grpc_init();
srand(clock());
memset(arge, 0, sizeof(arge));
args.args = arge;
cl = gpr_cmdline_create("echo server");
gpr_cmdline_add_string(cl, "bind", "Bind host:port", &addr);
gpr_cmdline_add_flag(cl, "secure", "Run with security?", &secure);
gpr_cmdline_parse(cl, argc, argv);
gpr_cmdline_destroy(cl);
e = &arge[args.num_args++];
e->type = GRPC_ARG_POINTER;
e->key = GRPC_ARG_SERVE_OVER_HTTP;
e->value.pointer.p = &home_page;
if (addr == NULL) {
gpr_join_host_port(&addr_buf, "::", grpc_pick_unused_port_or_die());
addr = addr_buf;
}
gpr_log(GPR_INFO, "creating server on: %s", addr);
cq = grpc_completion_queue_create();
if (secure) {
grpc_ssl_pem_key_cert_pair pem_key_cert_pair = {test_server1_key,
test_server1_cert};
grpc_server_credentials *ssl_creds =
grpc_ssl_server_credentials_create(NULL, &pem_key_cert_pair, 1);
server = grpc_secure_server_create(ssl_creds, cq, &args);
GPR_ASSERT(grpc_server_add_secure_http2_port(server, addr));
grpc_server_credentials_release(ssl_creds);
} else {
server = grpc_server_create(cq, &args);
GPR_ASSERT(grpc_server_add_http2_port(server, addr));
}
grpc_server_start(server);
gpr_free(addr_buf);
addr = addr_buf = NULL;
request_call();
signal(SIGINT, sigint_handler);
while (!shutdown_finished) {
if (got_sigint && !shutdown_started) {
gpr_log(GPR_INFO, "Shutting down due to SIGINT");
grpc_server_shutdown(server);
grpc_completion_queue_shutdown(cq);
shutdown_started = 1;
}
ev = grpc_completion_queue_next(
cq, gpr_time_add(gpr_now(), gpr_time_from_micros(1000000)));
if (!ev) continue;
s = ev->tag;
switch (ev->type) {
case GRPC_SERVER_RPC_NEW:
if (ev->call != NULL) {
/* initial ops are already started in request_call */
grpc_call_server_accept_old(ev->call, cq, s);
grpc_call_server_end_initial_metadata_old(ev->call,
GRPC_WRITE_BUFFER_HINT);
GPR_ASSERT(grpc_call_start_read_old(ev->call, s) == GRPC_CALL_OK);
request_call();
} else {
GPR_ASSERT(shutdown_started);
gpr_free(s);
}
break;
case GRPC_WRITE_ACCEPTED:
GPR_ASSERT(ev->data.write_accepted == GRPC_OP_OK);
GPR_ASSERT(grpc_call_start_read_old(ev->call, s) == GRPC_CALL_OK);
break;
case GRPC_READ:
if (ev->data.read) {
assert_read_ok(ev->tag, ev->data.read);
GPR_ASSERT(grpc_call_start_write_old(ev->call, ev->data.read, s,
GRPC_WRITE_BUFFER_HINT) ==
GRPC_CALL_OK);
} else {
GPR_ASSERT(grpc_call_start_write_status_old(ev->call, GRPC_STATUS_OK,
NULL, s) == GRPC_CALL_OK);
}
break;
case GRPC_FINISH_ACCEPTED:
case GRPC_FINISHED:
if (gpr_unref(&s->pending_ops)) {
grpc_call_destroy(ev->call);
gpr_free(s);
}
break;
case GRPC_QUEUE_SHUTDOWN:
GPR_ASSERT(shutdown_started);
shutdown_finished = 1;
break;
default:
GPR_ASSERT(0);
}
grpc_event_finish(ev);
}
grpc_server_destroy(server);
grpc_completion_queue_destroy(cq);
grpc_shutdown();
return 0;
}