Req #53950 [Opn]: Add a way to configure where libxml searches for Catalog Files
Edit report at http://bugs.php.net/bug.php?id=53950&edit=1 ID: 53950 Updated by: rricha...@php.net Reported by:gordon at onlinehome dot de Summary:Add a way to configure where libxml searches for Catalog Files Status: Open Type: Feature/Change Request Package:*XML functions Operating System: any PHP Version:Irrelevant -Assigned To: +Assigned To:rrichards Block user comment: N Private report: N New Comment: Assign to self as I asked him to open this Previous Comments: [2011-02-08 19:18:43] cataphr...@php.net > This, by itself, makes it inviable to write a PHP function that allows > replacing the default catalog unless some (probably expensive, since a > catalog file must be read) on request startup/shutdown is used. The unless part doesn't actually make sense in the multi-threading versions of PHP. [2011-02-08 19:14:49] cataphr...@php.net I know very little of libxml2, but as far as I infer from http://xmlsoft.org/catalog.html and from the code in catalog.c, there is no way to specify a global catalog in a thread-local manner. This, by itself, makes it inviable to write a PHP function that allows replacing the default catalog unless some (probably expensive, since a catalog file must be read) on request startup/shutdown is used. libxml2 supports per-document catalogs, but from what I see, your document must contain an oasis-xml-catalog processing instruction, like this: http://example.com/catalog.xml";?> http://www.example.com/schema/doc.dtd";> There is another alternative, which is using an external entity loader (see http://xmlsoft.org/html/libxml-parser.html#xmlSetExternalEntityLoader ), but this is less convenient, though probably we could also expose some functions to deal with catalogs for use in the user-supplied callback. I could implement this, but I'm hopping someone else with more libxml2 knowledge could tell if my analysis is correct. [2011-02-07 17:16:37] gordon at onlinehome dot de Description: Libxml can use catalog files to provide a local cache mechanism allowing to load the entities associated to public identifiers or remote resources. There is currently no way to configure the catalog file path from PHP. Configuring the path in libxml itself seems possible: > The user can change the default catalog behaviour by redirecting queries to its own set of catalogs. This can be done by setting the XML_CATALOG_FILES environment variable to a list of catalogs, an empty one should deactivate loading the default /etc/xml/catalog default catalog. It would be nice if PHP's libxml extension would provide a way to set the path somehow. This could be helpful when validating documents with remote System Identifiers, like any HTML DTD. Or simply to bundle files with an application. Related Resources: - http://xmlsoft.org/catalog.html - http://www.w3.org/blog/systeam/2008/02/08/w3c_s_excessive_dtd_traffic - http://bugs.php.net/48080 - http://bugs.php.net/32426 -- Edit this bug report at http://bugs.php.net/bug.php?id=53950&edit=1
Req #53950 [Opn]: Add a way to configure where libxml searches for Catalog Files
Edit report at http://bugs.php.net/bug.php?id=53950&edit=1 ID: 53950 Updated by: cataphr...@php.net Reported by:gordon at onlinehome dot de Summary:Add a way to configure where libxml searches for Catalog Files Status: Open Type: Feature/Change Request Package:*XML functions Operating System: any PHP Version:Irrelevant Block user comment: N Private report: N New Comment: > This, by itself, makes it inviable to write a PHP function that allows > replacing the default catalog unless some (probably expensive, since a > catalog file must be read) on request startup/shutdown is used. The unless part doesn't actually make sense in the multi-threading versions of PHP. Previous Comments: [2011-02-08 19:14:49] cataphr...@php.net I know very little of libxml2, but as far as I infer from http://xmlsoft.org/catalog.html and from the code in catalog.c, there is no way to specify a global catalog in a thread-local manner. This, by itself, makes it inviable to write a PHP function that allows replacing the default catalog unless some (probably expensive, since a catalog file must be read) on request startup/shutdown is used. libxml2 supports per-document catalogs, but from what I see, your document must contain an oasis-xml-catalog processing instruction, like this: http://example.com/catalog.xml";?> http://www.example.com/schema/doc.dtd";> There is another alternative, which is using an external entity loader (see http://xmlsoft.org/html/libxml-parser.html#xmlSetExternalEntityLoader ), but this is less convenient, though probably we could also expose some functions to deal with catalogs for use in the user-supplied callback. I could implement this, but I'm hopping someone else with more libxml2 knowledge could tell if my analysis is correct. [2011-02-07 17:16:37] gordon at onlinehome dot de Description: Libxml can use catalog files to provide a local cache mechanism allowing to load the entities associated to public identifiers or remote resources. There is currently no way to configure the catalog file path from PHP. Configuring the path in libxml itself seems possible: > The user can change the default catalog behaviour by redirecting queries to its own set of catalogs. This can be done by setting the XML_CATALOG_FILES environment variable to a list of catalogs, an empty one should deactivate loading the default /etc/xml/catalog default catalog. It would be nice if PHP's libxml extension would provide a way to set the path somehow. This could be helpful when validating documents with remote System Identifiers, like any HTML DTD. Or simply to bundle files with an application. Related Resources: - http://xmlsoft.org/catalog.html - http://www.w3.org/blog/systeam/2008/02/08/w3c_s_excessive_dtd_traffic - http://bugs.php.net/48080 - http://bugs.php.net/32426 -- Edit this bug report at http://bugs.php.net/bug.php?id=53950&edit=1
Req #53950 [Opn]: Add a way to configure where libxml searches for Catalog Files
Edit report at http://bugs.php.net/bug.php?id=53950&edit=1 ID: 53950 Updated by: cataphr...@php.net Reported by:gordon at onlinehome dot de Summary:Add a way to configure where libxml searches for Catalog Files Status: Open Type: Feature/Change Request Package:*XML functions Operating System: any PHP Version:Irrelevant Block user comment: N Private report: N New Comment: I know very little of libxml2, but as far as I infer from http://xmlsoft.org/catalog.html and from the code in catalog.c, there is no way to specify a global catalog in a thread-local manner. This, by itself, makes it inviable to write a PHP function that allows replacing the default catalog unless some (probably expensive, since a catalog file must be read) on request startup/shutdown is used. libxml2 supports per-document catalogs, but from what I see, your document must contain an oasis-xml-catalog processing instruction, like this: http://example.com/catalog.xml";?> http://www.example.com/schema/doc.dtd";> There is another alternative, which is using an external entity loader (see http://xmlsoft.org/html/libxml-parser.html#xmlSetExternalEntityLoader ), but this is less convenient, though probably we could also expose some functions to deal with catalogs for use in the user-supplied callback. I could implement this, but I'm hopping someone else with more libxml2 knowledge could tell if my analysis is correct. Previous Comments: [2011-02-07 17:16:37] gordon at onlinehome dot de Description: Libxml can use catalog files to provide a local cache mechanism allowing to load the entities associated to public identifiers or remote resources. There is currently no way to configure the catalog file path from PHP. Configuring the path in libxml itself seems possible: > The user can change the default catalog behaviour by redirecting queries to its own set of catalogs. This can be done by setting the XML_CATALOG_FILES environment variable to a list of catalogs, an empty one should deactivate loading the default /etc/xml/catalog default catalog. It would be nice if PHP's libxml extension would provide a way to set the path somehow. This could be helpful when validating documents with remote System Identifiers, like any HTML DTD. Or simply to bundle files with an application. Related Resources: - http://xmlsoft.org/catalog.html - http://www.w3.org/blog/systeam/2008/02/08/w3c_s_excessive_dtd_traffic - http://bugs.php.net/48080 - http://bugs.php.net/32426 -- Edit this bug report at http://bugs.php.net/bug.php?id=53950&edit=1
