urlopen error [Errno 111] Connection refused

[maishuguang]

When I press "ctrl+shift+g", error occurs as bellow:

[dotcypress]

Could you provide Sublime logs?

[0xdevalias]

Potentially related:

• https://github.com/dotcypress/GitHubMarkdownPreview/issues/32
• https://github.com/dotcypress/GitHubMarkdownPreview/issues/33

[0xdevalias]

The error I hit is while editing a document, that hasn't been saved to a file, and thus also isn't going to be part of a GitHub repo:

Error in GitHubMarkdownPreview package:

'NoneType' object has no attribute 'rfind'

Using Sublime Text (build 4143) on macOS Ventura

---

For what's it's worth, I'm pretty sure the problem is that the package assumes the markdown file exists in a git repo.

Exploring how this addon works, for my own benefit, but also to help others figure out where there errors may be occuring/why..

The command is defined here, and calls the github_markdown_preview function in the code: https://github.com/dotcypress/GitHubMarkdownPreview/blob/bafa0df006d05750f06614049953cd78b54e93c3/Default.sublime-commands#L3-L4

github_markdown_preview_command:

• tries to get the repoName with repoName = get_github_repo_name(self.view.file_name())
• which is later used to generate the html of the preview with html = generate_preview(self.view.substr(selection), repoName)
• this html is then written to a temporary file (temp_file = tempfile.NamedTemporaryFile(delete=False, suffix='.html')), and opened in the web browser (webbrowser.open("file://" + temp_file.name))

https://github.com/dotcypress/GitHubMarkdownPreview/blob/bafa0df006d05750f06614049953cd78b54e93c3/GHMarkdownPreview.py#L64-L82

get_github_repo_name will return None if the filename is None; otherwise it will call git to try and parse the repo name from the git remote, when it's using HTTPS (not SSH):

https://github.com/dotcypress/GitHubMarkdownPreview/blob/bafa0df006d05750f06614049953cd78b54e93c3/GHMarkdownPreview.py#L36-L49

generate_preview:

• calls the https://api.github.com/markdown API (either with urllib2, or curl when on linux (because "The python package included with sublime text for Linux is missing the ssl module (for technical reasons)")
  • it puts the git repo_name in the context field of the json body sent to the /markdown API

    • The repository context to use when creating references in gfm mode. For example, setting context to octo-org/octo-repo will change the text #42 into an HTML link to issue 42 in the octo-org/octo-repo repository.

• returns the response, which appears to be a string containing the HTML from rendering the provided markdown

https://github.com/dotcypress/GitHubMarkdownPreview/blob/bafa0df006d05750f06614049953cd78b54e93c3/GHMarkdownPreview.py#L51-L62

The docs for GitHub's /markdown API endpoint are at:

• https://docs.github.com/en/rest/markdown?apiVersion=2022-11-28#render-a-markdown-document

Originally posted by @0xdevalias in https://github.com/dotcypress/GitHubMarkdownPreview/issues/33#issuecomment-1404361635