int xml_parse(char *buf,int size, int index)

{



    int i,len,id;

    xmlDocPtr doc;

    xmlNodePtr curNode;



    doc = xmlParseMemory(buf,size);

    if (doc == NULL)

    {

        fprintf(stderr,"Document not parsed successfully.\n");

        return -1;

    }

    curNode = xmlDocGetRootElement(doc);        // get root element

    if (NULL == curNode)

    {

        fprintf(stderr,"empty document.\n");

        xmlFreeDoc(doc);

        return -1;

    }

    if (xmlStrcmp(curNode->name, BAD_CAST "root"))

    {

        fprintf(stderr,"document of the wrong type, root node != root");

        xmlFreeDoc(doc);

        return -1;

    }



    curNode = curNode->xmlChildrenNode;         // get first child

    while(curNode != NULL)

    {

        if(!xmlStrcmp(curNode->name, BAD_CAST "heart_beat"))

        {

            //heart beat handle

            curNode = curNode->children;

            while(curNode != NULL)

            {

                if(0 == xmlStrcmp(curNode->name,(const xmlChar *) "time"))

                {

                    char *content = (char *)xmlNodeListGetString(doc,curNode->xmlChildrenNode,1);

                    if(content)

                    {

                        printf("recv notify...\n");

                        xmlFree(content);

                    }

                     break;