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/* An XML-RPC server program written in C, as an example of using
compound XML-RPC values.
For a simple server program that just deals with integer values,
see xmlrpc_sample_add_server.c. This example focuses just on the
compound XML-RPC values and not the server functions.
This server provides the example.divide XML-RPC method that the example
client program compound_value_client.c invokes. See that program for
details on what the method does.
The program takes one argument: the HTTP port number on which the server
is to accept connections, in decimal.
Example:
$ ./compound_value_server 8080&
$ ./compound_value_client
*/
#define WIN32_LEAN_AND_MEAN /* required by xmlrpc-c/server_abyss.h */
#include <stdlib.h>
#include <stdio.h>
#include <xmlrpc-c/base.h>
#include <xmlrpc-c/server.h>
#include <xmlrpc-c/server_abyss.h>
#include "config.h" /* information about this build environment */
static void
computeQuotient(xmlrpc_env * const envP,
xmlrpc_value * const ratioP,
xmlrpc_double * const quotientP) {
xmlrpc_value * dividendP;
xmlrpc_struct_find_value(envP, ratioP, "DIVIDEND", ÷ndP);
if (!envP->fault_occurred) {
if (!dividendP)
xmlrpc_env_set_fault(
envP, 0, "Structure is missing 'DIVIDEND' member");
else {
xmlrpc_value * divisorP;
xmlrpc_struct_find_value(envP, ratioP, "DIVISOR", &divisorP);
if (!envP->fault_occurred) {
if (!divisorP)
xmlrpc_env_set_fault(
envP, 0, "Structure is missing 'DIVISOR' member");
else {
xmlrpc_double dividend;
xmlrpc_read_double(envP, dividendP, ÷nd);
if (!envP->fault_occurred) {
xmlrpc_double divisor;
xmlrpc_read_double(envP, divisorP, &divisor);
if (!envP->fault_occurred)
*quotientP = dividend / divisor;
}
xmlrpc_DECREF(divisorP);
}
}
xmlrpc_DECREF(dividendP);
}
}
}
static void
computeQuotients(xmlrpc_env * const envP,
xmlrpc_value * const ratioArrayP,
xmlrpc_value ** const quotientArrayPP) {
xmlrpc_value * quotientArrayP;
quotientArrayP = xmlrpc_array_new(envP);
if (!envP->fault_occurred) {
unsigned int const ratioCt = xmlrpc_array_size(envP, ratioArrayP);
unsigned int i;
for (i = 0; i < ratioCt && !envP->fault_occurred; ++i) {
xmlrpc_value * ratioP;
xmlrpc_array_read_item(envP, ratioArrayP, i, &ratioP);
if (!envP->fault_occurred) {
xmlrpc_double quotient;
computeQuotient(envP, ratioP, "ient);
if (!envP->fault_occurred) {
xmlrpc_value * quotientP;
quotientP = xmlrpc_double_new(envP, quotient);
if (!envP->fault_occurred) {
xmlrpc_array_append_item(envP, quotientArrayP,
quotientP);
xmlrpc_DECREF(quotientP);
}
}
xmlrpc_DECREF(ratioP);
}
}
if (envP->fault_occurred)
xmlrpc_DECREF(quotientArrayP);
else
*quotientArrayPP = quotientArrayP;
}
}
static xmlrpc_value *
example_divide(xmlrpc_env * const envP,
xmlrpc_value * const paramArrayP,
void * const serverInfo,
void * const channelInfo) {
xmlrpc_value * retvalP;
xmlrpc_int32 argVersion;
xmlrpc_value * ratioArrayP;
xmlrpc_decompose_value(envP, paramArrayP, "(iA)",
&argVersion, &ratioArrayP);
if (envP->fault_occurred)
return NULL;
if (argVersion != 1) {
xmlrpc_env_set_fault(envP, 0, "Parameter list version must be 1");
return NULL;
}
computeQuotients(envP, ratioArrayP, &retvalP);
xmlrpc_DECREF(ratioArrayP);
if (envP->fault_occurred)
return NULL;
return retvalP;
}
int
main(int const argc,
const char ** const argv) {
struct xmlrpc_method_info3 const methodInfo = {
/* .methodName = */ "example.divide",
/* .methodFunction = */ &example_divide,
};
xmlrpc_server_abyss_parms serverparm;
xmlrpc_registry * registryP;
xmlrpc_env env;
if (argc-1 != 1) {
fprintf(stderr, "You must specify 1 argument: The TCP port "
"number on which the server will accept connections "
"for RPCs (8080 is a common choice). "
"You specified %d arguments.\n", argc-1);
exit(1);
}
xmlrpc_env_init(&env);
registryP = xmlrpc_registry_new(&env);
xmlrpc_registry_add_method3(&env, registryP, &methodInfo);
/* In the modern form of the Abyss API, we supply parameters in memory
like a normal API. We select the modern form by setting
config_file_name to NULL:
*/
serverparm.config_file_name = NULL;
serverparm.registryP = registryP;
serverparm.port_number = atoi(argv[1]);
serverparm.log_file_name = "/tmp/xmlrpc_log";
printf("Running XML-RPC server...\n");
xmlrpc_server_abyss(&env, &serverparm, XMLRPC_APSIZE(log_file_name));
/* xmlrpc_server_abyss() never returns */
return 0;
}
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