我有一个XML，如下所示。它是一系列结构。数组内部的结构具有固定数量的元素，但数组可能有一个或多个结构，事先我们不知道有多少。 The documentation描述了解析固定数量的XML元素。我应该如何使用xmlrpc库中的xmlrpc_parse_value（）函数来解析这样的XML：
<methodResponse>
<params>
<param>
<value>
<array>
<data>
<value>
<struct>
<member>
<name>description</name>
<value>
<string>pid 32569, uptime 0:00:23</string>
</value>
</member>
<member>
<name>pid</name>
<value>
<int>32569</int>
</value>
</member>
<member>
<name>stderr_logfile</name>
<value>
<string>/var/log/supervisord/lp-se.err.log</string>
</value>
</member>
<member>
<name>stop</name>
<value>
<int>1519310402</int>
</value>
</member>
<member>
<name>logfile</name>
<value>
<string>/var/log/supervisord/lp-se.out.log</string>
</value>
</member>
<member>
<name>exitstatus</name>
<value>
<int>0</int>
</value>
</member>
<member>
<name>spawnerr</name>
<value>
<string />
</value>
</member>
<member>
<name>now</name>
<value>
<int>1519310425</int>
</value>
</member>
<member>
<name>group</name>
<value>
<string>lp-se</string>
</value>
</member>
<member>
<name>name</name>
<value>
<string>lp-se_0</string>
</value>
</member>
<member>
<name>statename</name>
<value>
<string>RUNNING</string>
</value>
</member>
<member>
<name>start</name>
<value>
<int>1519310402</int>
</value>
</member>
<member>
<name>state</name>
<value>
<int>20</int>
</value>
</member>
<member>
<name>stdout_logfile</name>
<value>
<string>/var/log/supervisord/lp-se.out.log</string>
</value>
</member>
</struct>
</value>
<value>
<struct>
<member>
<name>description</name>
<value>
<string>pid 31107, uptime 0:02:21</string>
</value>
</member>
<member>
<name>pid</name>
<value>
<int>31107</int>
</value>
</member>
<member>
<name>stderr_logfile</name>
<value>
<string>/var/log/supervisord/lp-se.err.log</string>
</value>
</member>
<member>
<name>stop</name>
<value>
<int>1519310284</int>
</value>
</member>
<member>
<name>logfile</name>
<value>
<string>/var/log/supervisord/lp-se.out.log</string>
</value>
</member>
<member>
<name>exitstatus</name>
<value>
<int>0</int>
</value>
</member>
<member>
<name>spawnerr</name>
<value>
<string />
</value>
</member>
<member>
<name>now</name>
<value>
<int>1519310425</int>
</value>
</member>
<member>
<name>group</name>
<value>
<string>lp-se</string>
</value>
</member>
<member>
<name>name</name>
<value>
<string>lp-se_1</string>
</value>
</member>
<member>
<name>statename</name>
<value>
<string>RUNNING</string>
</value>
</member>
<member>
<name>start</name>
<value>
<int>1519310284</int>
</value>
</member>
<member>
<name>state</name>
<value>
<int>20</int>
</value>
</member>
<member>
<name>stdout_logfile</name>
<value>
<string>/var/log/supervisord/lp-se.out.log</string>
</value>
</member>
</struct>
</value>
<value>
<struct>
<member>
<name>description</name>
<value>
<string>pid 30801, uptime 0:02:39</string>
</value>
</member>
<member>
<name>pid</name>
<value>
<int>30801</int>
</value>
</member>
<member>
<name>stderr_logfile</name>
<value>
<string>/var/log/supervisord/lp-se.err.log</string>
</value>
</member>
<member>
<name>stop</name>
<value>
<int>1519310265</int>
</value>
</member>
<member>
<name>logfile</name>
<value>
<string>/var/log/supervisord/lp-se.out.log</string>
</value>
</member>
<member>
<name>exitstatus</name>
<value>
<int>0</int>
</value>
</member>
<member>
<name>spawnerr</name>
<value>
<string />
</value>
</member>
<member>
<name>now</name>
<value>
<int>1519310425</int>
</value>
</member>
<member>
<name>group</name>
<value>
<string>lp-se</string>
</value>
</member>
<member>
<name>name</name>
<value>
<string>lp-se_10</string>
</value>
</member>
<member>
<name>statename</name>
<value>
<string>RUNNING</string>
</value>
</member>
<member>
<name>start</name>
<value>
<int>1519310266</int>
</value>
</member>
<member>
<name>state</name>
<value>
<int>20</int>
</value>
</member>
<member>
<name>stdout_logfile</name>
<value>
<string>/var/log/supervisord/lp-se.out.log</string>
</value>
</member>
</struct>
</value>
</data>
</array>
</value>
</param>
</params>
</methodResponse>
我希望看到的结果：计算结构总数和单独的结构数量，“州”成员的值为20。
答案 0 :(得分：0)
我自己找到了答案。我的例子如下：
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <xmlrpc.h>
#include <xmlrpc_client.h>
#define NAME "Supervisor XML-RPC client"
#define VERSION "0.1"
#define SERVER_URL "http://127.0.0.1:9001/RPC2"
void die_if_fault_occurred (xmlrpc_env *env)
{
/* Check our error-handling environment for an XML-RPC fault. */
if (env->fault_occurred) {
fprintf(stderr, "XML-RPC Fault: %s (%d)\n",
env->fault_string, env->fault_code);
exit(1);
}
}
int main (int argc, char** argv)
{
xmlrpc_env env;
xmlrpc_value *result = NULL;
unsigned int quotientCt = 0;
unsigned long long int total_process = 0ULL;
unsigned long long int correct_statename_count = 0ULL;
/* Start up our XML-RPC client library. */
xmlrpc_client_init(XMLRPC_CLIENT_NO_FLAGS, NAME, VERSION);
xmlrpc_env_init(&env);
/* Call our XML-RPC server. */
result = xmlrpc_client_call(&env, SERVER_URL,"supervisor.getAllProcessInfo","()");
die_if_fault_occurred(&env);
/* Parse our result value. */
total_process = xmlrpc_array_size(&env, result);
for (unsigned long long int i = 0; i < total_process; i++) {
xmlrpc_value * array_elementP;
char *description;
int pid;
char *stderr_logfile;
int stop;
char *logfile;
int exitstatus;
char *spawnerr;
int now;
char *group;
char *name;
char *statename;
int *start;
int state;
char *stdout_logfile;
xmlrpc_array_read_item(&env, result, i, &array_elementP);
xmlrpc_decompose_value(&env, array_elementP,
"{s:s,s:i,s:s,s:i,s:s,s:i,s:s,s:i,s:s,s:s,s:s,s:i,s:i,s:s,*}",
"description", &description,
"pid",&pid,
"stderr_logfile",&stderr_logfile,
"stop",&stop,
"logfile",&logfile,
"exitstatus",&exitstatus,
"spawnerr",&spawnerr,
"now",&now,
"group",&group,
"name",&name,
"statename",&statename,
"start",&start,
"state",&state,
"stdout_logfile",&stdout_logfile
);
char correct_statename[] = "RUNNING";
if (strncmp(statename, correct_statename,sizeof(correct_statename))==0) {
correct_statename_count++;
}
#if 1
printf("description:%s",description);
printf(" pid:%d",pid);
printf(" stderr_logfile:%s",stderr_logfile);
printf(" stop:%lld",stop);
printf(" logfile:%s",logfile);
printf(" exitstatus:%d",exitstatus);
printf(" spawnerr:%s",spawnerr);
printf(" now:%d",now);
printf(" group:%s",group);
printf(" name:%s",name);
printf(" statename:%s",statename);
printf(" start:%d",start);
printf(" state:%d",state);
printf(" stdout_logfile:%s ",stdout_logfile);
printf("\n");
#endif
die_if_fault_occurred(&env);
/* Dispose of our result value. */
xmlrpc_DECREF(array_elementP);
}
/* Dispose of our result value. */
xmlrpc_DECREF(result);
/* Shutdown our XML-RPC client library. */
xmlrpc_env_clean(&env);
xmlrpc_client_cleanup();
printf("total_process:%llu; correct_statename_count:%llu;\n",total_process,correct_statename_count);
return 0;
}