Hi Mark On Thu, Sep 10, 2015 at 5:04 PM, 'Mark S.' via TiddlyWiki < [email protected]> 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]. > 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/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] -- 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/CAPKKYJZr0gNSva_8tbCspzMW%3DKcDnZKbC%2BDt2Bs%2BFR4nb%2BvwHA%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
