Hi Mark

I am using FIREFOX 33 with  WINDOWS 7 and TW 5.1.8
>

Ah, that's the problem - the external text feature is new in 5.1.10. You
can try it out at the usual prerelease address.

Best wishes

Jeremy.


>
> Thanks!
> Mark
>
>
> On Friday, September 11, 2015 at 8:03:09 AM UTC-7, Jeremy Ruston wrote:
>
>> Hi Mark
>>
>> 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.
>>>
>>
>> You'd be surprised. As I said in my message above, Chrome doesn't allow
>> code running from a file:// URI to perform local file access. Also,
>> accessing file:// URIs is off limits in all browsers from http:// URIs.
>>
>> So, what browser(s) and operating system are you using? Can you share the
>> paths you're using too?
>>
>> Best wishes
>>
>> Jeremy.
>>
>>
>>
>>>
>>> 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 <
>>>> tiddl...@googlegroups.com> 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.
>>>>>>
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>>>>
>>>>
>>>>
>>>> --
>>>> Jeremy Ruston
>>>> mailto:jeremy...@gmail.com
>>>>
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>>
>>
>>
>> --
>> Jeremy Ruston
>> mailto:jeremy...@gmail.com
>>
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-- 
Jeremy Ruston
mailto:jeremy.rus...@gmail.com

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