1 /* A simple asynchronous XML-RPC client written in C, as an example of
2 Xmlrpc-c asynchronous RPC facilities. This is the same as the
3 simpler synchronous client xmlprc_sample_add_client.c, except that
4 it adds 3 different pairs of numbers with the summation RPCs going on
7 Use this with xmlrpc_sample_add_server. Note that that server
8 intentionally takes extra time to add 1 to anything, so you can see
9 our 5+1 RPC finish after our 5+0 and 5+2 RPCs.
15 #include <xmlrpc-c/base.h>
16 #include <xmlrpc-c/client.h>
18 #include "config.h" /* information about this build environment */
20 #define NAME "Xmlrpc-c Asynchronous Test Client"
24 die_if_fault_occurred (xmlrpc_env * const envP) {
25 if (envP->fault_occurred) {
26 fprintf(stderr, "Something failed. %s (XML-RPC fault code %d)\n",
27 envP->fault_string, envP->fault_code);
35 handle_sample_add_response(const char * const server_url,
36 const char * const method_name,
37 xmlrpc_value * const param_array,
38 void * const user_data ATTR_UNUSED,
39 xmlrpc_env * const faultP,
40 xmlrpc_value * const resultP) {
43 xmlrpc_int addend, adder;
45 /* Initialize our error environment variable */
46 xmlrpc_env_init(&env);
48 /* Our first four arguments provide helpful context. Let's grab the
49 addends from our parameter array.
51 xmlrpc_decompose_value(&env, param_array, "(ii)", &addend, &adder);
52 die_if_fault_occurred(&env);
54 printf("RPC with method '%s' at URL '%s' to add %d and %d "
55 "has completed\n", method_name, server_url, addend, adder);
57 if (faultP->fault_occurred)
58 printf("The RPC failed. %s", faultP->fault_string);
62 xmlrpc_read_int(&env, resultP, &sum);
63 die_if_fault_occurred(&env);
65 printf("The sum is %d\n", sum);
73 const char ** const argv ATTR_UNUSED) {
75 char * const serverUrl = "http://localhost:8080/RPC2";
76 char * const methodName = "sample.add";
79 xmlrpc_client * clientP;
83 fprintf(stderr, "This program has no arguments\n");
87 /* Initialize our error environment variable */
88 xmlrpc_env_init(&env);
90 /* Required before any use of Xmlrpc-c client library: */
91 xmlrpc_client_setup_global_const(&env);
92 die_if_fault_occurred(&env);
94 xmlrpc_client_create(&env, XMLRPC_CLIENT_NO_FLAGS, NAME, VERSION, NULL, 0,
96 die_if_fault_occurred(&env);
98 for (adder = 0; adder < 3; ++adder) {
99 printf("Making XMLRPC call to server url '%s' method '%s' "
100 "to request the sum "
101 "of 5 and %d...\n", serverUrl, methodName, adder);
103 /* request the remote procedure call */
104 xmlrpc_client_start_rpcf(&env, clientP, serverUrl, methodName,
105 handle_sample_add_response, NULL,
106 "(ii)", (xmlrpc_int32) 5, adder);
107 die_if_fault_occurred(&env);
110 printf("RPCs all requested. Waiting for & handling responses...\n");
112 /* Wait for all RPCs to be done. With some transports, this is also
113 what causes them to go.
115 xmlrpc_client_event_loop_finish(clientP);
117 printf("All RPCs finished.\n");
119 xmlrpc_client_destroy(clientP);