Math does not get rendered

[rubik]

I use MathJax in my project documentation and it does not get rendered!
I think this is the same of #99, not sure why that one was closed...

EDIT: This is what I mean:
https://radon.readthedocs.org/en/latest/intro.html#maintainability-index

You can see that there is a weird [MI escape instead of the formulas.

[vrajmohan]

I am able to see the formulas at https://radon.readthedocs.org/en/latest/intro.html#maintainability-index.

Perhaps you are not able to get MathJax from http://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML?

[vrajmohan]

Correction - I was able to see the formulas using Firefox 16.0.2 but not with Chrome Version 23.0.1271.64.
Chrome complained saying that the page has insecure content. When I chose to load the insecure content anyway, the formulas were correctly displayed.

Further investigation revealed that the JavaScript console on Chrome was reporting:
[blocked] The page at https://radon.readthedocs.org/en/latest/intro.html#maintainability-index ran insecure content from http://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML.
[blocked] The page at https://radon.readthedocs.org/en/latest/intro.html#maintainability-index ran insecure content from http://fonts.googleapis.com/css?family=PT+Mono|Open+Sans:300italic,400italic,700italic,400,300,700.
[blocked] The page at https://radon.readthedocs.org/en/latest/intro.html#maintainability-index ran insecure content from http://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML.
[blocked] The page at https://radon.readthedocs.org/en/latest/intro.html#maintainability-index ran insecure content from http://fonts.googleapis.com/css?family=PT+Mono|Open+Sans:300italic,400italic,700italic,400,300,700.

[rubik]

Thanks for the help. I'm using Chromium version 23.0.1271.64 (165188). It seems that the insecure content that Chrome complains about is some Javascript from MathJax. I found the following wiki section about this issue:
http://www.mediawiki.org/wiki/Extension_talk:MathJax#.5BFIXED.5D_MathJax_fails_to_render_in_Chrome

So apparently we just need to change MathJax url in Sphinx/Readthedocs conf.py, I'll dig Sphinx docs.

[vrajmohan]

Looks like you should be using src="https://c328740.ssl.cf1.rackcdn.com/mathjax/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML">. Ugly, but they say (http://docs.mathjax.org/en/latest/start.html#secure-access-to-the-cdn) it is a stable address.

[pao]

This is going to break for Firefox users very soon due to bug 834836 (release notes). This is currently in Aurora, and should be expected to hit release August 6.

[rubik]

Hmm thanks for the report. So there is no workaround?

[pao]

I think if you wanted a straight workaround, you'd need to pull in MathJax.js as a static file and would probably have to override one of the templates. But I suspect that figuring out how to fix it in readthedocs.org's templates would be better (and everyone would get to take advantage, then.)

[pao]

This actually looks to be driven by sphinx.ext.mathjax, which points at the CDN by default. One possible workaround would be to place a local JS file in your static folder which looks something like this (haven't tested yet):

  var mathjax_host = (
      ("https:" == document.location.protocol) 
      ? "https://c328740.ssl.cf1.rackcdn.com/" 
      : "http://cdn.mathjax.org/"
  );
  document.write(
      unescape(
          "%3Cscript"
              + " src='"
                  + mathjax_host
                  + "mathjax/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML"
              + "'"
              + " type='text/javascript'
          + "%3E"
          + "%3C/script%3E"
      ) // this HAS to be escaped, otherwise it would 
        // close the actual (not injected) <script> element
  );

Then, set mathjax_path in conf.py to point where that static file will end up. (JS cribbed from http://stackoverflow.com/a/2725730/105880)

[cdeil]

I have the same problem with this page ... mathjax works with Safari, but not Chrome.

Is it possible to implement a workaround in readthedocs so that not every project has to (I didn't try to snippet by @pao yet).

[hit9]

any updates on this issues? I meet the same problem now..

[rubik]

Apparently it's solved by adding this line in conf.py:

mathjax_path = 'http://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML'

Obviously the MathJax extension must be added as well to the corresponding setting variable. As you can see, now it gets rendered:
http://radon.readthedocs.org/en/latest/intro.html

On Chrome, at least. For me, the issue is solved and can be closed.

[hit9]

@rubik thanks a lot !

[rubik]

@hit9 No problem, happy to help! Did you solved the issue?

[hit9]

@rubik It seems works. http://curdpy.readthedocs.org/ Fonts on google.com display well.

[hit9]

@rubik but, it goes back into that problem a short time later. ..

[rubik]

@hit9 That's weird! My page still works as expected. Are you sure that it isn't another problem?

[pao]

@hit9 @rubik both links to radon and curdpy are http, not https--the CDN works perfectly fine on the non-SSL site.

[hit9]

@rubik @pao Yep. http ok, but https still blocked.

[ericholscher]

mathjax_path = '//cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML
http://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML'

Should work for both http and https.

Cheers,
Eric

On Tue, Oct 1, 2013 at 8:23 PM, 王超 notifications@github.com wrote:

@rubik https://github.com/rubik @pao https://github.com/pao Yep. http
ok, but https still blocked.

—
Reply to this email directly or view it on GitHubhttps://github.com//issues/283#issuecomment-25511085
.

Eric Holscher
Maker of the internet residing in Portland, Or
http://ericholscher.com

[hit9]

@ericholscher I tested your solution, but not work with https.

Commit is here: hit9/skylark@2b5d4df

[jodal]

I think you should remove the part inside the < and > quotes. I think it was only included in Eric's reply because of the conversion from his email reply to an GitHub Issues comment.

[ericholscher]

Ah, indeed. Sorry.

mathjax_path = '//cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML'

[hit9]

oh.. I updated that line to

mathjax_path = '//cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML'

https still blocked... http is always ok.

[pao]

That's not a surprise--as explained at http://docs.mathjax.org/en/latest/start.html#secure-access-to-the-cdn posted by @vrajmohan the URLs are not the same, hence the need for the stupidly complicated JS snippet.

[ericholscher]

You should be able to safely always point to https, and it will work fine on http.

[pao]

Except now you have mixed active content again.

[ericholscher]

an http page including an https link won't cause any issue that I know of. Lots of pages do it all the time.

[pao]

Sorry, you're quite right that I had that backwards. Maybe it's time to pull request a universal switch to the SSL CDN address?

[ericholscher]

Seems reasonable, as long as the SSL CDN isn't costing you ton of money.

On Mon, Oct 7, 2013 at 12:21 PM, pao notifications@github.com wrote:

Sorry, you're quite right that I had that backwards. Maybe it's time to
pull request a universal switch to the SSL CDN address?

—
Reply to this email directly or view it on GitHubhttps://github.com//issues/283#issuecomment-25837118
.

Eric Holscher
Maker of the internet residing in Portland, Or
http://ericholscher.com

[pao]

I've no idea how MathJax's hosting is funded.

[ericholscher]

Closing this now.