404 error on preview ... "buffer_id(29) is not valid (closed or unsupported file format)"

[BirdyOz]

When I attempt to preview a MD file, I get the following error in the browser:

"Error: 404 Not Found
Sorry, the requested URL 'http://127.0.0.1:51004/view/29' caused an error:

'buffer_id(29) is not valid (closed or unsupported file format)'

NOTE: If you run multiple instances of Sublime Text, you may want to adjust
the server_port option in order to get this plugin work again."

This is what I see in the console:

OmniMarkupPreviewer: [INFO] Launching web browser for http://127.0.0.1:51004/view/29
OmniMarkupPreviewer: [ERROR] Exception occured while rendering using MarkdownRenderer
Traceback (most recent call last):
File "/Users/BirdyOz/Library/Application Support/Sublime Text 3/Packages/OmniMarkupPreviewer/OmniMarkupLib/RendererManager.py", line 266, in render_text
rendered_text = renderer.render(text, filename=filename)
File "/Users/BirdyOz/Library/Application Support/Sublime Text 3/Packages/OmniMarkupPreviewer/OmniMarkupLib/Renderers/MarkdownRenderer.py", line 48, in render
extensions=self.extensions)
File "/Users/BirdyOz/Library/Application Support/Sublime Text 3/Packages/python-markdown/st3/markdown/init.py", line 493, in markdown
md = Markdown(_args, *_kwargs)
File "/Users/BirdyOz/Library/Application Support/Sublime Text 3/Packages/python-markdown/st3/markdown/init.py", line 159, in init
configs=kwargs.get('extension_configs', {}))
File "/Users/BirdyOz/Library/Application Support/Sublime Text 3/Packages/python-markdown/st3/markdown/init.py", line 185, in registerExtensions
ext = self.build_extension(ext, configs.get(ext, {}))
File "/Users/BirdyOz/Library/Application Support/Sublime Text 3/Packages/python-markdown/st3/markdown/init.py", line 291, in build_extension
return module.makeExtension(**configs)
File "/Users/BirdyOz/Library/Application Support/Sublime Text 3/Packages/OmniMarkupPreviewer/OmniMarkupLib/Renderers/libs/mdx_strikeout.py", line 17, in makeExtension
return StrikeoutExtension(configs=configs)
File "/Users/BirdyOz/Library/Application Support/Sublime Text 3/Packages/python-markdown/st3/markdown/extensions/init.py", line 51, in init
self.setConfigs(kwargs)
File "/Users/BirdyOz/Library/Application Support/Sublime Text 3/Packages/python-markdown/st3/markdown/extensions/init.py", line 82, in setConfigs
self.setConfig(key, value)
File "/Users/BirdyOz/Library/Application Support/Sublime Text 3/Packages/python-markdown/st3/markdown/extensions/init.py", line 70, in setConfig
if isinstance(self.config[key][0], bool):
KeyError: 'configs'

I have read other issue resolutions. I do not have multiple versions of ST running. I have tried the "fix" whereby you change the ports, but this did not resolve the issue.

[jfcherng]

Did you get ScopeHunter installed?

The python-markdown extension which is introduced by ScopeHunter could cause this error...
Disabling ScopeHunter won't help but uninstalling it helps.
I don't know who should be responsible for this and how to make them co-exist.

[jfcherng]

@timonwong Maybe we could use dependencies in package control as facelessuser mentioned in facelessuser/ScopeHunter#28 (comment) for better compatibility with other plugins?
It seems that the latest stable version of python-markdown goes to 2.6.5 now.

[facelessuser]

Using the dependency might be difficult for OmniMarkdownPreview because the dependency (which I maintain) does not have ST2 support which so far was a conscious move. If someone where willing to support a ST2 variant, I wouldn't be against adding it, I am just not sure if I want that extra work for something I don't really use anymore; I only use ST3.

Python Markdown no longer supports Python 2.6 in the latest releases (which ST2 uses), so in order to maintain a ST2/ST3 dependency, Python 2.6 support has to be preserved every time time you merge, and you have to evaluate that all new changes are Python 2.6 compatible. Maintaining Python 2.6 support isn't too bad right now as Python Markdown 2 is right now in bug fixes only mode. But when Python Markdown 3 is one day released, there will be a lot of work that would need to be done to get 3.0 support backported to Python 2.6. Work that I am just not interested in.

It is possible that Markdown 3 might not ever get merged into the Sublime dependencies as they plan on separating out all the extensions and using entry points to import the plugins. I am not sure yet how well that will play in the Sublime environment. If entry points don't work well in Sublime then we would probably need to stick with Markdown 2 releases, or overhaul the framework to work with Sublime. If the dependency never gets upgraded to 3 then ST2/ST3 wouldn't be that bad as no new features are planned for the Markdown 2 releases.

If you want to vendor the latest, you can can get a Python 2.6 compatible release of Markdown 2.6.5 found in Markdown Preview. You would have to remove a couple of custom extensions, but other than that, you just drop it in and call in relatively. I personally upgraded Markdown Preview's markdown version, but it is probably the last upgrade I plan on doing as I don't actively use Markdown Preview much anymore.

[scuml]

Quick Fix 1: Remove Strikethrough Extension

Sublime Text > Preferences > Package Settings > OmniMarkupPreviewer > Settings - User
paste the following to remove the strikeout package.

{
    "renderer_options-MarkdownRenderer": {
        "extensions": ["tables", "fenced_code", "codehilite"]
    }
}

Quick Fix 2: Fix the Strikethrough Extension (if you need it)

Find the python-markdown sublime package.

On the Mac: subl "/Users/<username>/Library/Application Support/Sublime Text 3/Packages/OmniMarkupPreviewer/OmniMarkupLib/Renderers/libs/mdx_strikeout.py"

Replace the makeExtension() method with the following:

def makeExtension(*args, **kwargs):
    return StrikeoutExtension(*args, **kwargs)

Save, quit and reload Sublime Text.

[jfcherng]

@scuml Thanks, I am using Quick Fix 1 and it works.

[jnns]

Related, most likely a duplicate: #93

[Spacebody]

Thanks. Quick Fix 1 works

[eromoe]

Quick Fix 1 should be the default settings.
But Latest commit 21921ac on 15 Jun 2015, seems no more maintain ?

It because sublimetext-markdown-preview was so slow to show a preview that I switched to OmniMarkupPreviewer.
Just now, I looked back to markdown-preview and found add below config could make it as fast as this:

{
    "parser": "markdown",
    "enabled_parsers": ["markdown"]
}

[crossingmay]

@scuml Thank u！ Quick Fix 2 works!~

[yangjiannan2018]

using Quick Fix 1 works for me ~
thx!

[YeomanYe]

@scuml Thanks! Quick Fix 1 works

[clayclayclay]

Thank you Quick Fix 1 works @scuml

[fhybj]

@scuml Thanks! Quick Fix 1 works

[Suor]

Quick Fix 2 prevents live and non-live updates for me. Even when I close page and reopen I can't see changes to a file.

[naifan]

@scuml Thanks! Quick Fix 1 works for me

[ringcrl]

Thanks. Quick Fix 1 works

[persiliao]

Thanks. Quick Fix 1 works

[echohuub]

@scuml Thanks. Quick Fix 1 works

[JiaxinZhuang]

@scuml Thanks.Quick Fix 1 works

[ouweiya]

Thanks. Quick Fix 1 works

[Oaklight]

Quick fix 2 works. Thanks.

[mysterin]

Quick fix 1 works, Thanks.

[dbrandydude]

Awesome, fix 1 works. Thanks!

[mambo4]

@scuml fix 1 did the trick for me, thanks

[vongoh]

Fix #1 FTW

[woshixixi]

@scuml fixed, thanks!!!!

[brelian]

@scuml fixed +1. tks！

[zehuichen123]

@scuml I've tried the two quick fix ways but both of them didn't work. As you can see, I've modified mdx_strikeout.py:

import markdown
from markdown.inlinepatterns import SimpleTagPattern


STRIKEOUT_RE = r'(\~\~)([^\s](?:.*))(\~\~)'


class StrikeoutExtension(markdown.Extension):
    """ Strikeout extension for Python-Markdown. """

    def extendMarkdown(self, md, md_globals):
        """ Modifies inline patterns. """
        md.inlinePatterns.add('del', SimpleTagPattern(STRIKEOUT_RE, 'del'), '<not_strong')


def makeExtension(*args, **kwargs):
    return StrikeoutExtension(*args, **kwargs)

and modified OmniMakeupPreviewer settings-user like this:

{
	"missing_module_reported": true,
	"renderer_options-MarkdownRenderer": {
        "extensions": ["tables", "fenced_code", "codehilite"]
    }
}

Then reload my sublime but I still get a 404:

Error: 404 Not Found

Sorry, the requested URL 'http://127.0.0.1:51004/view/28' caused an error:

'buffer_id(28) is not valid (closed or unsupported file format)'

**NOTE:** If you run multiple instances of Sublime Text, you may want to adjust
the `server_port` option in order to get this plugin work again.

Can anyone help me or did I do something wrong? I just want to preview my restructured text :(

[izackwu]

Thanks. Quick Fix 1 does help.

[geekyouth]

extensions error, ImportError: No module named 'tables' https://gitmemory.com/issue/timonwong/OmniMarkupPreviewer/138/562414026

Preferences > Package Settings > OmniMarkupPreviewer > Settings - User

{
    "server_host": "0.0.0.0",
    "server_port": 51004,
    "renderer_options-MarkdownRenderer":
    {
        "extensions": ["markdown.extensions.tables", "markdown.extensions.fenced_code", "markdown.extensions.codehilite"]
    }
}

it works on my sublime version 3.2.2-3211
🤞

[crliu95]

Quick Fix 1 should be the default settings.
But Latest commit 21921ac on 15 Jun 2015, seems no more maintain ?

It because sublimetext-markdown-preview was so slow to show a preview that I switched to OmniMarkupPreviewer.
Just now, I looked back to markdown-preview and found add below config could make it as fast as this:

{
    "parser": "markdown",
    "enabled_parsers": ["markdown"]
}

Have tried the both methods (each at one time), but failed.

[chenrenyi]

Remove package "markdownpreview" works for me

[hahaxy]

extensions error, ImportError: No module named 'tables' https://gitmemory.com/issue/timonwong/OmniMarkupPreviewer/138/562414026

Preferences > Package Settings > OmniMarkupPreviewer > Settings - User

{
    "server_host": "0.0.0.0",
    "server_port": 51004,
    "renderer_options-MarkdownRenderer":
    {
        "extensions": ["markdown.extensions.tables", "markdown.extensions.fenced_code", "markdown.extensions.codehilite"]
    }
}

it works on my sublime version 3.2.2-3211
🤞

Thanks, this works for me

[deb-intel]

Quick Fix 1: Remove Strikethrough Extension worked for me! Thanks SO much!

[ZhouLiHai]

extensions error, ImportError: No module named 'tables' https://gitmemory.com/issue/timonwong/OmniMarkupPreviewer/138/562414026

Preferences > Package Settings > OmniMarkupPreviewer > Settings - User

{
    "server_host": "0.0.0.0",
    "server_port": 51004,
    "renderer_options-MarkdownRenderer":
    {
        "extensions": ["markdown.extensions.tables", "markdown.extensions.fenced_code", "markdown.extensions.codehilite"]
    }
}

it works on my sublime version 3.2.2-3211
🤞

Thanks, this works for me

It works for me.