parse-node-from-xml.c

MANTIS是由科罗拉多大学开发的传感器网络嵌入式操作系统。 这是mantis的0.9.5版本的源码。

#include <string.h>

#include <glib.h>

#include "bionet.h"
#include "libbionet-internal.h"
#include "bionet-util.h"


bionet_node_t *libbionet_parse_node_from_xml(xmlNode *node_node) {
    char *hab_type, *hab_id, *node_id;
    bionet_node_t *node;


    if (node_node->type != XML_ELEMENT_NODE) {
        g_log(BIONET_LOG_DOMAIN, G_LOG_LEVEL_WARNING, "invalid XML element type passed to libbionet_parse_node_from_xml()");
        return NULL;
    }

    if (strcmp(node_node->name, "node") != 0) {
        g_log(BIONET_LOG_DOMAIN, G_LOG_LEVEL_WARNING, "non-<node> XML element passed to libbionet_parse_node_from_xml()");
        return NULL;
    }


    node = (bionet_node_t *)calloc(1, sizeof(bionet_node_t));
    if (node == NULL) {
        g_log(BIONET_LOG_DOMAIN, G_LOG_LEVEL_ERROR, "out of memory!");
        return NULL;
    }


    //
    // handle node-id
    //

    node_id = xmlGetProp(node_node, "node-id");
    if (node_id == NULL) {
        g_log(BIONET_LOG_DOMAIN, G_LOG_LEVEL_WARNING, "error parsing <node> message, prop 'node-id' not found!");
        free(node);
        return NULL;
    }

    node->id = strdup(node_id);
    xmlFree(node_id);

    if (node->id == NULL) {
        g_log(BIONET_LOG_DOMAIN, G_LOG_LEVEL_ERROR, "out of memory!");
        free(node);
        return NULL;
    }


    //
    // handle hab-type
    //

    hab_type = xmlGetProp(node_node, "hab-type");
    if (hab_type == NULL) {
        g_log(BIONET_LOG_DOMAIN, G_LOG_LEVEL_WARNING, "error parsing <node> message, prop 'hab-type' not found!");
        free(node->id);
        free(node);
        return NULL;
    }

    node->hab_type = strdup(hab_type);
    xmlFree(hab_type);

    if (node->hab_type == NULL) {
        g_log(BIONET_LOG_DOMAIN, G_LOG_LEVEL_ERROR, "out of memory!");
        free(node->id);
        free(node);
        return NULL;
    }


    //
    // handle hab-id
    //

    hab_id = xmlGetProp(node_node, "hab-id");
    if (hab_id == NULL) {
        g_log(BIONET_LOG_DOMAIN, G_LOG_LEVEL_WARNING, "error parsing <node> message, prop 'hab-id' not found!");
        free(node->id);
        free(node->hab_type);
        free(node);
        return NULL;
    }

    node->hab_id = strdup(hab_id);
    xmlFree(hab_id);

    if (node->hab_id == NULL) {
        g_log(BIONET_LOG_DOMAIN, G_LOG_LEVEL_ERROR, "out of memory!");
        free(node->id);
        free(node->hab_type);
        free(node);
        return NULL;
    }


    // look at all those resources!
    {
        xmlNode *resource_node;

        for (resource_node = node_node->children; resource_node != NULL; resource_node = resource_node->next) {
            char *id, *flavor, *type, *value, *time;
            int r;

            if (resource_node->type != XML_ELEMENT_NODE) {
                continue;
            }

            id = xmlGetProp(resource_node, "id");
            flavor = xmlGetProp(resource_node, "flavor");
            type = xmlGetProp(resource_node, "type");
            value = xmlGetProp(resource_node, "value");
            time = xmlGetProp(resource_node, "time");

            if (!bionet_is_valid_name_component(id)) {
                g_log(BIONET_LOG_DOMAIN, G_LOG_LEVEL_WARNING, "NAG published node %s.%s.%s with invalid Resource-ID '%s'", node->hab_type, node->hab_id, node->id, id);
                xmlFree(id);
                xmlFree(flavor);
                xmlFree(type);
                xmlFree(value);
                xmlFree(time);
                bionet_node_free(node);
                return NULL;
            }

            r = bionet_node_add_resource_with_valuestr_timestr(node, type, flavor, id, value, time);

            xmlFree(id);
            xmlFree(flavor);
            xmlFree(type);
            xmlFree(value);
            xmlFree(time);

            if (r < 0) {
                g_log(
                    BIONET_LOG_DOMAIN,
                    G_LOG_LEVEL_WARNING,
                    "Cannot parse resource for published node %s.%s.%s: type='%s', flavor='%s', id='%s', value='%s', time='%s'",
                    node->hab_type,
                    node->hab_id,
                    node->id,
                    type,
                    flavor,
                    id,
                    value,
                    time
                );
                bionet_node_free(node);
                return NULL;
            }
        }
    }

    return node;
}