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Add support for 'admin' includes from web XSLT files

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This adds support for including xslt files that are in the admin
directory in an xslt file which is in the webroot, without having to
specify the full path.

For example:

    <xsl:include href="includes/head.xsl"/>

will look inside the admin directory (foo/bar/admin/includes/header.xsl)
and include it, if it's found. If not it will as usual look for it in
the directory where the xslt file is located. This enables us to have
common files like the header, footer, json stuff, etc. in the admin
directory, so we don't need to have an extra copy in the web folder.

Note:
The configuration value for the admin directory is requested
every time an xslt is requested (if not in the cache).
Additonally it should be noted that the includes are not cached.
This commit is contained in:
Marvin Scholz 2015-02-25 15:49:01 +01:00
parent 225c6f240a
commit 5b416b311c
1 changed files with 57 additions and 0 deletions
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57
src/xslt.c
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@ -21,10 +21,12 @@
#include <libxml/xmlIO.h>
#include <libxml/xinclude.h>
#include <libxml/catalog.h>
#include <libxml/uri.h>
#include <libxslt/xslt.h>
#include <libxslt/xsltInternals.h>
#include <libxslt/transform.h>
#include <libxslt/xsltutils.h>
#include <libxslt/documents.h>
#include <sys/types.h>
#include <sys/stat.h>
@ -48,6 +50,7 @@
#include "global.h"
#include "refbuf.h"
#include "client.h"
#include "config.h"
#include "stats.h"
#include "fserve.h"
#include "util.h"
@ -95,6 +98,11 @@ int xsltSaveResultToString(xmlChar **doc_txt_ptr, int * doc_txt_len, xmlDocPtr r
static stylesheet_cache_t cache[CACHESIZE];
static mutex_t xsltlock;
/* Reference to the original xslt loader func */
static xsltDocLoaderFunc xslt_loader;
/* Admin path cache */
static xmlChar *admin_path = NULL;
void xslt_initialize(void)
{
memset(cache, 0, sizeof(stylesheet_cache_t) * CACHESIZE);
@ -103,6 +111,7 @@ void xslt_initialize(void)
LIBXML_TEST_VERSION
xmlSubstituteEntitiesDefault(1);
xmlLoadExtDtdDefaultValue = 1;
xslt_loader = xsltDocDefaultLoader;
}
void xslt_shutdown(void) {
@ -118,6 +127,8 @@ void xslt_shutdown(void) {
thread_mutex_destroy (&xsltlock);
xmlCleanupParser();
xsltCleanupGlobals();
if (admin_path)
xmlFree(admin_path);
}
static int evict_cache_entry(void) {
@ -184,6 +195,51 @@ static xsltStylesheetPtr xslt_get_stylesheet(const char *fn) {
return cache[i].stylesheet;
}
/* Custom xslt loader */
static xmlDocPtr custom_loader(const xmlChar *URI,
xmlDictPtr dict,
int options,
void *ctxt,
xsltLoadType type)
{
xmlDocPtr ret;
xmlChar *rel_path, *fn, *final_URI;
xsltStylesheet *c;
ice_config_t *config;
final_URI = xmlStrdup(URI);
switch (type) {
/* In case an include is loaded */
case XSLT_LOAD_STYLESHEET:
c = (xsltStylesheet *) ctxt;
/* Check if we actually have context/path */
if (ctxt == NULL || c->doc->URL == NULL)
break;
rel_path = xmlBuildRelativeURI(URI, c->doc->URL);
if (rel_path != NULL && admin_path != NULL) {
struct stat file;
fn = xmlBuildURI(rel_path, admin_path);
if (fn != NULL && stat((char *)fn, &file) == 0) {
final_URI = fn;
}
}
break;
/* In case a top stylesheet is loaded */
case XSLT_LOAD_START:
config = config_get_config();
admin_path = xmlCharStrdup(config->adminroot_dir);
config_release_config();
admin_path = xmlStrcat(admin_path, (xmlChar *)"/");
break;
default:
break;
}
/* Get the actual xmlDoc */
ret = xslt_loader(final_URI, dict, options, ctxt, type);
xmlFree(final_URI);
return ret;
}
void xslt_transform(xmlDocPtr doc, const char *xslfilename, client_t *client)
{
xmlDocPtr res;
@ -195,6 +251,7 @@ void xslt_transform(xmlDocPtr doc, const char *xslfilename, client_t *client)
xmlSetGenericErrorFunc("", log_parse_failure);
xsltSetGenericErrorFunc("", log_parse_failure);
xsltSetLoaderFunc(custom_loader);
thread_mutex_lock(&xsltlock);
cur = xslt_get_stylesheet(xslfilename);