Hi Jeremy, In case it wasn't clear, I was talking about reading local text files. I wouldn't think there would have to be any security restrictions against reading local files -- I can use the browser to browse to and read local text files.
Firefox 33, TW 5.1.8, Win 7 Thanks! Mark On Friday, September 11, 2015 at 2:30:24 AM UTC-7, Jeremy Ruston wrote: > > Hi Mark > > On Thu, Sep 10, 2015 at 5:04 PM, 'Mark S.' via TiddlyWiki < > [email protected] <javascript:>> wrote: > >> Is _canonical_uri supposed to work with text files? I can't get it to >> show a simple text file with either an absolute address (provided by >> tiddlysnip) nor a relative address. But it does work with absolute and >> relative addresses of image files. >> >> What I mean is that the text of the text file does not show up in the >> _canonical_uri tiddler. I tried saving the text file in the 4 different >> file encodings offered by Notepad. >> >> It wouldn't even show me a text file in the same directory as the TW file. >> >> I could get it to work with an absolute, but not relative path to a PDF >> (with application/tiddler). >> >> It's odd that advanced file formats work but not a simple text file. >> > > What browser and operating system are you using? > > The _canonical_uri field is handled very differently for images vs. text. > For images, we just assign the URL to an <img> element, and there are no > cross-domain issues. For text tiddlers, the equivalent approach would be to > use an iframe. However, if we did that we wouldn't be able to access the > actual text of the tiddler. So, instead we use xmlhttprequest, a JavaScript > API provided by browsers since the dawn of time. The trouble with it is > that browsers have implemented a number of restrictions on its use in the > interests of security. Worse, those restrictions differ between browsers. > > One situation where external text tiddlers work consistently across > browsers is when the TiddlyWiki HTML file is accessed over HTTP (or HTTPS) > and the tiddler is on the same server (technically, on the same domain). > Everybody should be able to see the full text of Alice in Wonderland here, > even though it is a lazily loaded external tiddler: > > http://tiddlywiki.com/prerelease/index.html#Alice%20in%20Wonderland > > However, setting the _canonical_uri to a different server will only work > if that server is "CORS enabled". > > The situation is not so good if the HTML file is being accessed on a > file:// URI. In my tests, Chrome refuses to load the external tiddler, > while Firefox is quite happy. > > The complexity of the implementation landscape is why I initially resisted > adding this feature. As I feared, it's proving hard for many users to get > it working because of the requirement to understand the browser limitations. > > Best wishes > > Jeremy. > > > > > > > >> >> Mark >> >> TW 5.1.8, FF 33.0, Win 7 >> >> >> On Wednesday, September 9, 2015 at 8:17:47 AM UTC-7, Danielo Rodríguez >> wrote: >>> >>> Hello, >>> >>> Now I see that the canonical uri field can be used to point to external >>> files that got rendered into the TW tiddler body, I want to point to some >>> source code files. >>> >>> But, I am not getting any success. The way I'm doing it is using >>> relative paths >>> >>> _canonical_uri: ../../Dropbox/somewhere/file.js >>> >>> I am using node.js version, maybe that is the problem? Should I use the >>> standalone edition instead? >>> >>> I have to say that I find the name of the field hard to type. I >>> remember a pull request to add a drop-down with common fields, was it >>> merged? >>> >>> Regards. >>> >> -- >> You received this message because you are subscribed to the Google Groups >> "TiddlyWiki" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected] <javascript:>. >> To post to this group, send email to [email protected] >> <javascript:>. >> Visit this group at http://groups.google.com/group/tiddlywiki. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/tiddlywiki/6db8a709-91e1-4ca8-90ec-8c170d78a15f%40googlegroups.com >> >> <https://groups.google.com/d/msgid/tiddlywiki/6db8a709-91e1-4ca8-90ec-8c170d78a15f%40googlegroups.com?utm_medium=email&utm_source=footer> >> . >> >> For more options, visit https://groups.google.com/d/optout. >> > > > > -- > Jeremy Ruston > mailto:[email protected] <javascript:> > -- You received this message because you are subscribed to the Google Groups "TiddlyWiki" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/tiddlywiki. To view this discussion on the web visit https://groups.google.com/d/msgid/tiddlywiki/e0e4755c-3199-4800-b2c1-f0743006fc88%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
