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/* A simple asynchronous XML-RPC client written in C, as an example of
Xmlrpc-c asynchronous RPC facilities. This is the same as the
simpler synchronous client xmlprc_sample_add_client.c, except that
it adds 3 different pairs of numbers with the summation RPCs going on
simultaneously.
Use this with xmlrpc_sample_add_server. Note that that server
intentionally takes extra time to add 1 to anything, so you can see
our 5+1 RPC finish after our 5+0 and 5+2 RPCs.
*/
#include <stdlib.h>
#include <stdio.h>
#include <xmlrpc-c/base.h>
#include <xmlrpc-c/client.h>
#include "config.h" /* information about this build environment */
#define NAME "Xmlrpc-c Asynchronous Test Client"
#define VERSION "1.0"
static void
die_if_fault_occurred (xmlrpc_env * const envP) {
if (envP->fault_occurred) {
fprintf(stderr, "Something failed. %s (XML-RPC fault code %d)\n",
envP->fault_string, envP->fault_code);
exit(1);
}
}
static void
handle_sample_add_response(const char * const server_url,
const char * const method_name,
xmlrpc_value * const param_array,
void * const user_data ATTR_UNUSED,
xmlrpc_env * const faultP,
xmlrpc_value * const resultP) {
xmlrpc_env env;
xmlrpc_int addend, adder;
/* Initialize our error environment variable */
xmlrpc_env_init(&env);
/* Our first four arguments provide helpful context. Let's grab the
addends from our parameter array.
*/
xmlrpc_decompose_value(&env, param_array, "(ii)", &addend, &adder);
die_if_fault_occurred(&env);
printf("RPC with method '%s' at URL '%s' to add %d and %d "
"has completed\n", method_name, server_url, addend, adder);
if (faultP->fault_occurred)
printf("The RPC failed. %s", faultP->fault_string);
else {
xmlrpc_int sum;
xmlrpc_read_int(&env, resultP, &sum);
die_if_fault_occurred(&env);
printf("The sum is %d\n", sum);
}
}
int
main(int const argc,
const char ** const argv ATTR_UNUSED) {
char * const serverUrl = "http://localhost:8080/RPC2";
char * const methodName = "sample.add";
xmlrpc_env env;
xmlrpc_client * clientP;
xmlrpc_int adder;
if (argc-1 > 0) {
fprintf(stderr, "This program has no arguments\n");
exit(1);
}
/* Initialize our error environment variable */
xmlrpc_env_init(&env);
/* Required before any use of Xmlrpc-c client library: */
xmlrpc_client_setup_global_const(&env);
die_if_fault_occurred(&env);
xmlrpc_client_create(&env, XMLRPC_CLIENT_NO_FLAGS, NAME, VERSION, NULL, 0,
&clientP);
die_if_fault_occurred(&env);
for (adder = 0; adder < 3; ++adder) {
printf("Making XMLRPC call to server url '%s' method '%s' "
"to request the sum "
"of 5 and %d...\n", serverUrl, methodName, adder);
/* request the remote procedure call */
xmlrpc_client_start_rpcf(&env, clientP, serverUrl, methodName,
handle_sample_add_response, NULL,
"(ii)", (xmlrpc_int32) 5, adder);
die_if_fault_occurred(&env);
}
printf("RPCs all requested. Waiting for & handling responses...\n");
/* Wait for all RPCs to be done. With some transports, this is also
what causes them to go.
*/
xmlrpc_client_event_loop_finish(clientP);
printf("All RPCs finished.\n");
xmlrpc_client_destroy(clientP);
return 0;
}
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