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cleanup cleanup too added xmlNoNetExternalEntityLoader() from xsltproc

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* Makefile.am: cleanup
* threads.c: cleanup too
* xmlIO.c include/libxml/xmlIO.h: added xmlNoNetExternalEntityLoader()
  from xsltproc
* include/libxml/tree.h include/libxml/parser.h: trying to break a
  dependancy loop.
Daniel
This commit is contained in:
Daniel Veillard
2001-10-31 17:52:43 +00:00
parent 91c0040ace
commit 8bdb91dd5c
7 changed files with 166 additions and 8 deletions
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131
xmlIO.c
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@ -2596,3 +2596,134 @@ xmlLoadExternalEntity(const char *URL, const char *ID,
return(xmlCurrentExternalEntityLoader(URL, ID, ctxt));
}
/************************************************************************
* *
* Disabling Network access *
* *
************************************************************************/
#ifdef LIBXML_CATALOG_ENABLED
static int
xmlNoNetExists(const char *URL)
{
#ifdef HAVE_STAT
int ret;
struct stat info;
const char *path;
if (URL == NULL)
return (0);
if (!xmlStrncmp(BAD_CAST URL, BAD_CAST "file://localhost", 16))
path = &URL[16];
else if (!xmlStrncmp(BAD_CAST URL, BAD_CAST "file:///", 8)) {
#ifdef _WIN32
path = &URL[8];
#else
path = &URL[7];
#endif
} else
path = URL;
ret = stat(path, &info);
if (ret == 0)
return (1);
#endif
return (0);
}
#endif
/**
* xmlNoNetExternalEntityLoader:
* @URL: the URL for the entity to load
* @ID: the System ID for the entity to load
* @ctxt: the context in which the entity is called or NULL
*
* A specific entity loader disabling network accesses, though still
* allowing local catalog accesses for resolution.
*
* Returns a new allocated xmlParserInputPtr, or NULL.
*/
xmlParserInputPtr
xmlNoNetExternalEntityLoader(const char *URL, const char *ID,
xmlParserCtxtPtr ctxt) {
xmlParserInputPtr input = NULL;
xmlChar *resource = NULL;
#ifdef LIBXML_CATALOG_ENABLED
xmlCatalogAllow pref;
/*
* If the resource doesn't exists as a file,
* try to load it from the resource pointed in the catalogs
*/
pref = xmlCatalogGetDefaults();
if ((pref != XML_CATA_ALLOW_NONE) && (!xmlNoNetExists(URL))) {
/*
* Do a local lookup
*/
if ((ctxt->catalogs != NULL) &&
((pref == XML_CATA_ALLOW_ALL) ||
(pref == XML_CATA_ALLOW_DOCUMENT))) {
resource = xmlCatalogLocalResolve(ctxt->catalogs,
(const xmlChar *)ID,
(const xmlChar *)URL);
}
/*
* Try a global lookup
*/
if ((resource == NULL) &&
((pref == XML_CATA_ALLOW_ALL) ||
(pref == XML_CATA_ALLOW_GLOBAL))) {
resource = xmlCatalogResolve((const xmlChar *)ID,
(const xmlChar *)URL);
}
if ((resource == NULL) && (URL != NULL))
resource = xmlStrdup((const xmlChar *) URL);
/*
* TODO: do an URI lookup on the reference
*/
if ((resource != NULL) && (!xmlNoNetExists((const char *)resource))) {
xmlChar *tmp = NULL;
if ((ctxt->catalogs != NULL) &&
((pref == XML_CATA_ALLOW_ALL) ||
(pref == XML_CATA_ALLOW_DOCUMENT))) {
tmp = xmlCatalogLocalResolveURI(ctxt->catalogs, resource);
}
if ((tmp == NULL) &&
((pref == XML_CATA_ALLOW_ALL) ||
(pref == XML_CATA_ALLOW_GLOBAL))) {
tmp = xmlCatalogResolveURI(resource);
}
if (tmp != NULL) {
xmlFree(resource);
resource = tmp;
}
}
}
#endif
if (resource == NULL)
resource = (xmlChar *) URL;
if (resource != NULL) {
if ((!xmlStrncasecmp((const xmlChar *) resource,
(const xmlChar *) "ftp://", 6)) ||
(!xmlStrncasecmp((const xmlChar *) resource,
(const xmlChar *) "http://", 7))) {
xmlGenericError(xmlGenericErrorContext,
"Attempt to load network entity %s \n", resource);
if (resource != (xmlChar *) URL)
xmlFree(resource);
return(NULL);
}
}
input = xmlDefaultExternalEntityLoader((const char *) resource, ID, ctxt);
if (resource != (xmlChar *) URL)
xmlFree(resource);
return(input);
}