aniani/icecast-server
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reduce memory allocation and processing when retrieving stats for xsl pages

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svn path=/icecast/trunk/icecast/; revision=15462
This commit is contained in:
Karl Heyes 2008-10-29 02:47:41 +00:00
parent 544c41ce60
commit 3addc16981
5 changed files with 44 additions and 164 deletions
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2
src/admin.c
View File

@ -991,7 +991,7 @@ static void command_stats(client_t *client, const char *mount, int response) {
DEBUG0("Stats request, sending xml stats");
stats_get_xml(&doc, 1, mount);
doc = stats_get_xml(1, mount);
admin_send_response(doc, client, response, STATS_TRANSFORMED_REQUEST);
xmlFreeDoc(doc);
return;

2
src/fserve.c
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@ -481,7 +481,7 @@ int fserve_client_create (client_t *httpclient, const char *path)
char *eol = strrchr (reference, '.');
if (eol)
*eol = '\0';
stats_get_xml (&doc, 0, reference);
doc = stats_get_xml (0, reference);
free (reference);
admin_send_response (doc, httpclient, TRANSFORMED, "xspf.xsl");
xmlFreeDoc(doc);

200
src/stats.c
View File

@ -746,41 +746,50 @@ static int _send_event_to_client(stats_event_t *event, client_t *client)
return 0;
}
void _dump_stats_to_queue (event_queue_t *queue)
static xmlNodePtr _dump_stats_to_doc (xmlNodePtr root, const char *show_mount, int hidden)
{
avl_node *node;
avl_node *node2;
stats_event_t *event;
stats_source_t *source;
avl_node *avlnode;
xmlNodePtr ret = NULL;
thread_mutex_lock(&_stats_mutex);
/* first we fill our queue with the current stats */
/* start with the global stats */
node = avl_get_first(_stats.global_tree);
while (node) {
event = _make_event_from_node((stats_node_t *)node->key, NULL);
_add_event_to_queue(event, queue);
node = avl_get_next(node);
/* general stats first */
avlnode = avl_get_first(_stats.global_tree);
while (avlnode)
{
stats_node_t *stat = avlnode->key;
if (stat->hidden <= hidden)
xmlNewTextChild (root, NULL, XMLSTR(stat->name), XMLSTR(stat->value));
avlnode = avl_get_next (avlnode);
}
/* now per mount stats */
avlnode = avl_get_first(_stats.source_tree);
while (avlnode)
{
stats_source_t *source = (stats_source_t *)avlnode->key;
if (source->hidden <= hidden &&
(show_mount == NULL || strcmp (show_mount, source->source) == 0))
{
avl_node *avlnode2 = avl_get_first (source->stats_tree);
xmlNodePtr xmlnode = xmlNewTextChild (root, NULL, XMLSTR("source"), NULL);
/* now the stats for each source */
node = avl_get_first(_stats.source_tree);
while (node) {
source = (stats_source_t *)node->key;
node2 = avl_get_first(source->stats_tree);
while (node2) {
event = _make_event_from_node((stats_node_t *)node2->key, source->source);
_add_event_to_queue(event, queue);
node2 = avl_get_next(node2);
xmlSetProp (xmlnode, XMLSTR("mount"), XMLSTR(source->source));
if (ret == NULL)
ret = xmlnode;
while (avlnode2)
{
stats_node_t *stat = avlnode2->key;
xmlNewTextChild (xmlnode, NULL, XMLSTR(stat->name), XMLSTR(stat->value));
avlnode2 = avl_get_next (avlnode2);
}
}
node = avl_get_next(node);
avlnode = avl_get_next (avlnode);
}
thread_mutex_unlock(&_stats_mutex);
return ret;
}
/* factoring out code for stats loops
** this function copies all stats to queue, and registers
** the queue for all new events atomically.
@ -895,43 +904,6 @@ typedef struct _source_xml_tag {
struct _source_xml_tag *next;
} source_xml_t;
static xmlNodePtr _find_xml_node(char *mount, source_xml_t **list, xmlNodePtr root)
{
source_xml_t *node, *node2;
int found = 0;
/* search for existing node */
node = *list;
while (node) {
if (strcmp(node->mount, mount) == 0) {
found = 1;
break;
}
node = node->next;
}
if (found) return node->node;
/* if we didn't find it, we must build it and add it to the list */
/* build node */
node = (source_xml_t *)malloc(sizeof(source_xml_t));
node->mount = strdup(mount);
node->node = xmlNewChild (root, NULL, XMLSTR("source"), NULL);
xmlSetProp (node->node, XMLSTR("mount"), XMLSTR(mount));
node->next = NULL;
/* add node */
if (*list == NULL) {
*list = node;
} else {
node2 = *list;
while (node2->next) node2 = node2->next;
node2->next = node;
}
return node->node;
}
void stats_transform_xslt(client_t *client, const char *uri)
{
@ -939,7 +911,7 @@ void stats_transform_xslt(client_t *client, const char *uri)
char *xslpath = util_get_path_from_normalised_uri (uri);
const char *mount = httpp_get_query_param (client->parser, "mount");
stats_get_xml(&doc, 0, mount);
doc = stats_get_xml (0, mount);
xslt_transform(doc, xslpath, client);
@ -947,113 +919,21 @@ void stats_transform_xslt(client_t *client, const char *uri)
free (xslpath);
}
void stats_get_xml(xmlDocPtr *doc, int show_hidden, const char *show_mount)
xmlDocPtr stats_get_xml(int show_hidden, const char *show_mount)
{
stats_event_t *event;
event_queue_t queue;
xmlNodePtr node, srcnode;
source_xml_t *src_nodes = NULL;
source_xml_t *next;
event_queue_init (&queue);
_dump_stats_to_queue (&queue);
*doc = xmlNewDoc (XMLSTR("1.0"));
node = xmlNewDocNode(*doc, NULL, XMLSTR("icestats"), NULL);
xmlDocSetRootElement(*doc, node);
event = _get_event_from_queue(&queue);
while (event)
{
if (event->hidden <= show_hidden)
{
do
{
xmlChar *name, *value;
name = xmlEncodeEntitiesReentrant (*doc, XMLSTR(event->name));
value = xmlEncodeEntitiesReentrant (*doc, XMLSTR(event->value));
srcnode = node;
if (event->source)
{
if (show_mount && strcmp (event->source, show_mount) != 0)
break;
srcnode = _find_xml_node(event->source, &src_nodes, node);
}
else
srcnode = node;
xmlNewChild(srcnode, NULL, XMLSTR(name), XMLSTR(value));
xmlFree (value);
xmlFree (name);
} while (0);
}
_free_event(event);
event = _get_event_from_queue(&queue);
}
while (src_nodes) {
next = src_nodes->next;
free(src_nodes->mount);
free(src_nodes);
src_nodes = next;
}
}
void stats_sendxml(client_t *client)
{
int bytes;
stats_event_t *event;
event_queue_t queue;
xmlDocPtr doc;
xmlNodePtr node, srcnode;
int len;
xmlChar *buff = NULL;
source_xml_t *snd;
source_xml_t *src_nodes = NULL;
event_queue_init (&queue);
_dump_stats_to_queue (&queue);
xmlNodePtr node;
doc = xmlNewDoc (XMLSTR("1.0"));
node = xmlNewDocNode (doc, NULL, XMLSTR("icestats"), NULL);
xmlDocSetRootElement(doc, node);
node = _dump_stats_to_doc (node, show_mount, show_hidden);
event = _get_event_from_queue(&queue);
while (event) {
if (event->source == NULL) {
xmlNewChild (node, NULL, XMLSTR(event->name), XMLSTR(event->value));
} else {
srcnode = _find_xml_node(event->source, &src_nodes, node);
xmlNewChild (srcnode, NULL, XMLSTR(event->name), XMLSTR(event->value));
}
_free_event(event);
event = _get_event_from_queue(&queue);
}
xmlDocDumpMemory(doc, &buff, &len);
xmlFreeDoc(doc);
client->respcode = 200;
bytes = sock_write(client->con->sock, "HTTP/1.0 200 OK\r\n"
"Content-Length: %d\r\n"
"Content-Type: text/xml\r\n"
"\r\n", len);
if (bytes > 0) client->con->sent_bytes += bytes;
else goto send_error;
bytes = client_send_bytes (client, buff, (unsigned)len);
send_error:
while (src_nodes) {
snd = src_nodes->next;
free(src_nodes->mount);
free(src_nodes);
src_nodes = snd;
}
if (buff) xmlFree(buff);
return doc;
}
static int _compare_stats(void *arg, void *a, void *b)
{
stats_node_t *nodea = (stats_node_t *)a;

2
src/stats.h
View File

@ -95,7 +95,7 @@ void stats_callback (client_t *client, void *notused);
void stats_transform_xslt(client_t *client, const char *uri);
void stats_sendxml(client_t *client);
void stats_get_xml(xmlDocPtr *doc, int show_hidden, const char *show_mount);
xmlDocPtr stats_get_xml(int show_hidden, const char *show_mount);
char *stats_get_value(const char *source, const char *name);
#endif /* __STATS_H__ */

2
win32/Icecast2winDlg.cpp
View File

@ -545,7 +545,7 @@ void StartStats(void *dummy)
xmlDocPtr doc;
stats_get_xml(&doc, 0, NULL);
doc = stats_get_xml(0, NULL);
xmlNodePtr cur;
cur = xmlDocGetRootElement(doc);