Bug 5998

Summary: WebKit should recognize anything with MIME type *+xml as xml.
Product: WebKit Reporter: Eric Seidel (no email) <eric>
Component: DOMAssignee: Eric Seidel (no email) <eric>
Status: RESOLVED FIXED    
Severity: Normal CC: cdumez
Priority: P4 Keywords: InRadar
Version: 420+   
Hardware: Mac   
OS: OS X 10.4   
Bug Depends on:    
Bug Blocks: 8645    
Attachments:
Description Flags
Fix, including comprehensive test case. andersca: review+

Eric Seidel (no email)
Reported 2005-12-07 23:35:39 PST
WebKit should recognize anything with MIME type *+xml as xml. From email: From: chris Subject: CDF and the +xml convention Date: December 7, 2005 12:35:54 PM PST To: eseidel Cc: mjs Reply-To: chris On Wednesday, December 7, 2005, 7:39:05 PM, Eric wrote: ES> Chris, ES> Could you explain to me how, according to RFC 3023 browsers are ES> supposed to detect that that is XML? From the introduction: To enable the exchange of XML network entities, this document standardizes five new media types -- text/xml, application/xml, text/xml-external-parsed-entity, application/xml-external-parsed-entity, and application/xml-dtd -- as well as a naming convention for identifying XML-based MIME media types. also 7. A Naming Convention for XML-Based Media Types This document recommends the use of a naming convention (a suffix of '+xml') for identifying XML-based MIME media types, whatever their particular content may represent. This allows the use of generic XML processors and technologies on a wide variety of different XML document types at a minimum cost, using existing frameworks for media type registration. [...] Some areas where 'generic' processing is useful include: o Browsing - An XML browser can display any XML document with a provided [CSS] or [XSLT] style sheet, whatever the vocabulary of that document. +xml as the final token on the subtype means that the media type has used this naming convention and is identifying itself as an XML-based media type. This test is a test of that; its not necessarily good practice, just a test. ES> Safari (in my mind) correctly notices the bogus MIME type and ES> downloads the file to your desktop (not even trying to render it). That is conformant behaviour for unknown types; but its also conformant to parse the xml (since its identified as XML) and use namespace dispatching. ES> When you drop the file on Safari from your desktop, the Mac OS ES> "Launch Services" attempts to determine what sort of file it is, and ES> seems to decide text/html (given the initially sniffed <html> content ES> and the fact that I can tell our code is taking the HTML parser path ES> instead of the XML parser path. That is unfortunate. ES> This leads to a correct rendering of ES> the text content of the file, but ignores the SVG tags entirely, ES> instead the HTML parser treats them as bogus HTML tags (creating ES> plain old Elements for them). That is conformant (unfortunately) for text/html. ES> One might argue with this second "drop on Safari" behavior, given ES> that a namespace is specified... Yes, sniffing is complicated, and there is not much compound document stuff around currently; also, is unsafe to assume that any random html-looking document is wellformed(in fact,it statistically most improbable that it is well formed). Note though that RFC specifically forbids using +xml for anything that is not XML, so in the case where there is an authoritative media type (eg HTTP, MIME email, RTP)it can be safely assumed that the content is XML. ES> But what would in your mind be "correct" behavior for this file (w/o ES> breaking the rest of the web), When received from the server, parse it and look for known namespaces, known stylesheet languages etc. On the local filesystem, in the absence of any filesystem metadata, I can't see an alternative to sniffing but a check for likely xml and a well formedness check to verify would seemlike a better approach than assuming anything with html-looking element names is text/html. ES> and down what path of logical ES> decisions must we tread (as a browser dealing w/ a bogus file) in ES> order to achieve this correct behavior? Does the above help? ES> Thanks for your time. No problem. Happy to discuss it further, here or on public-cdf@w3.org. Apple, as members of W3C and implementors of an XML-based browser, would of course be most welcome to join the CDF WG as well. ES> -eric ES> On Dec 7, 2005, at 10:17 AM, Chris Lilley wrote: On Wednesday, December 7, 2005, 3:21:02 PM, jeff_schiller wrote: j> Here's my take : j> http://blog.codedread.com/archives/2005/12/06/the-svg-roller- coaster/ You note there that Opera "plans to support CDF in a big way, which is fantastic news.". It is, I agree; part of the point of SVG being in XMLis that it can be used as a graphical namespace - something that knows how to draw itself - in compound documents. I put together a quick test, used in a recent CDF WG meeting; it serves a compound document as a bogus unregistered media type, application/foobar+xml with an unknown/unsniffable filename extension of .foobar Thus the only thing that is known about it, per RFC 3023, is that it is in XML. Opera 9 happily renders it, finding both the XHTML and SVG namespaces in there. http://www.w3.org/2005/10/SVGinXHTML.foobar -- Chris Lilley Chair, W3C SVG Working Group W3C Graphics Activity Lead Co-Chair, W3C Hypertext CG -- Chris Lilley Chair, W3C SVG Working Group W3C Graphics Activity Lead Co-Chair, W3C Hypertext CG
Attachments
Fix, including comprehensive test case. (11.05 KB, patch)
2006-04-28 02:44 PDT, Eric Seidel (no email) 		andersca: review+
DetailsFormatted DiffDiff
View All Add attachment proposed patch, testcase, etc.
Eric Seidel (no email)
Comment 1 2006-04-28 02:44:46 PDT
Created attachment 8018 [details] Fix, including comprehensive test case.
Eric Seidel (no email)
Comment 2 2006-04-28 02:45:30 PDT
This is in radar as: <rdar://problem/4031511> XmlHttpRequest doesn't allow responses with Content-Type: application/soap+xml
Anders Carlsson
Comment 3 2006-04-28 02:53:00 PDT
Comment on attachment 8018 [details] Fix, including comprehensive test case. Looks great, r=me! I'd like it if you could make that //FIXME into a bug report and refer to it in the comments.
Eric Seidel (no email)
Comment 4 2006-04-28 03:54:22 PDT
Actually, the patch I posted only fixes xmlhttprequest. I'll open a separate bug to track fixes needed for WebKit.
Lucas Forschler
Comment 5 2019-02-06 09:02:59 PST
Mass moving XML DOM bugs to the "DOM" Component.
Note You need to log in before you can comment on or make changes to this bug.