initial commit
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269799c80f
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2
.gitignore
vendored
2
.gitignore
vendored
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config.py
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# ---> Python
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# Byte-compiled / optimized / DLL files
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__pycache__/
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# landoc
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Server for sharing documents over a LAN
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Server for sharing documents over a LAN
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Not well-tested; please do not use this over the Internet
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15
config.py
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15
config.py
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root = "/path/to/documents/"
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# The path to the direvtory containing the documents
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title = "User-Visible Title"
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# A user-visible title for the server (e.g. "School Documents" or "My Notes")
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allowed_file_types = ["txt", "odt", "pdf", "md"]
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# File types that LANdoc will serve; all other file types will result in 403
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# Forbidden
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# To disallow one of these file types, remove it; to allow another type, add
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# its extension without the `.`
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# `md` and `txt` files will be displayed in the LANdoc viewer; all other files
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# will be sent as-is to the client
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270
landoc.py
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270
landoc.py
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import flask
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import jinja2
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import os
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import mimetypes
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import bleach
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from markdown_it import MarkdownIt
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app = flask.Flask(__name__)
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md = MarkdownIt("commonmark", {"typographer": True}).enable(
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["replacements", "smartquotes"]
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)
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def split_url(url):
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segments = [""]
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for character in url:
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segments[-1] += character
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if character == "/":
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segments.append("")
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if not segments[-1]:
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del segments[-1]
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paths = [
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[segment, "".join(segments[: i + 1])]
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for i, segment in enumerate(segments)
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]
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paths[0][0] = f"<strong>{title}</strong>: {paths[0][0]}"
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return paths
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def render(path, main, show_print=True, status_code=200):
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path = jinja2.filters.escape(path)
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path_segments = split_url(path)
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path_html = (
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"".join(
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[
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f' <li class=crumb><a href="{path}" class=button>{name}</a></li>\n'
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for name, path in path_segments[:-1]
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]
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)
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+ f" <li class=crumb><span class=button>{path_segments[-1][0]}</span></li>"
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)
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actions = (
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"""<hr>
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<ul class=buttons>
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<li class=crumb>
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<a class=button href="javascript:void print();">Print</a>
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</li>
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</ul>"""
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if show_print
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else ""
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)
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body = (
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f"""<!DOCTYPE html>
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<html>
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<head>
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<title>{path} - {title}</title>
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<meta name="viewport" content="width=device-width, initial-scale=1">
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<meta charset="UTF-8">
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<style>
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header {{
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border: 1px solid black;
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padding: 5px;
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background-color: #F0F0F0;
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border-radius: 20px;
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}}
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a.button, span.button {{
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border: 1px solid #404040;
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background-color: white;
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border-radius: 100px;
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padding: 8px;
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margin: 3px;
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min-width: 10px;
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display: inline-block;
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}}
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a.button {{
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color: blue;
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text-decoration: none;
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}}
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* {{
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font-family: "DejaVu Sans", "DejaVu Sans Book", "DejaVu Sans Regular", "Noto Sans", "Noto Sans Regular", sans-serif;
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}}
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pre {{
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font-family: monospace;
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}}
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ul.buttons {{
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display: inline;
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padding: 0;
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}}
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li.crumb {{
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display: inline;
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}}
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button[disabled] {{
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color: black;
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}}
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main {{
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margin: 1em;
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max-width: 40em;
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}}
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p {{
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line-height: 200%;
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text-indent: 0.5in;
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}}
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a.direntry {{
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color: blue !important;
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}}
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@media print {{
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* {{
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font-family: "DejaVu Serif", "DejaVu Serif Book", "DejaVu Serif Regular", "Noto Serif", "Noto Serif Regular", serif;
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}}
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header {{
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display: none;
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}}
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main {{
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max-width: 1000em;
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}}
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h1, h2, h3, h4, h5, h6 {{
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break-after: avoid;
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}}
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}}
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</style>
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</head>
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<body>
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<header>
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<nav>
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<ul class=buttons>
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{path_html}
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</ul>
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</nav>
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{actions}
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<noscript>
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<hr>
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<p><strong>Note:</strong> JavaScript appears to be disabled. Some features, such as printing, may not work.<p>
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</noscript>
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</header>
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<main>
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{main}
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</main>
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</body>
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</html>
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""",
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)
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return flask.Response(
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body,
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headers={"Content-Type": "text/html"},
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status=status_code,
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)
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def render_txt(text, path):
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text = jinja2.filters.escape(text.decode("utf-8"))
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return render(path, f"<pre>{bleach.clean(text)}</pre>")
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def render_md(text, path):
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text = bleach.clean(
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md.render(text.decode("utf-8")),
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tags=[
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"a",
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"abbr",
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"acronym",
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"b",
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"blockquote",
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"code",
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"em",
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"i",
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"li",
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"ol",
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"strong",
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"ul",
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"p",
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"pre",
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"img",
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"h1",
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"h2",
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"h3",
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"h4",
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"h5",
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"h6",
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"hr",
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],
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attributes={
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"a": ["href", "title"],
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"abbr": ["title"],
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"acronym": ["title"],
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"ol": ["start"],
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"li": ["value"],
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},
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)
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return render(path, text)
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def render_directory(contents, path):
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# TODO: strikethrough forbidden files
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if path.endswith("/"):
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contents.sort()
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listing = "".join(
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[
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f'<li><a href="{os.path.join(path, i)}" class=direntry>{i}{"/" if os.path.isdir(os.path.join(root, path[1:], i)) else ""}</a></li>'
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for i in contents
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]
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)
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return render(
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path, f"<ul class=listing>{listing}</ul>", show_print=False
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)
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else:
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return flask.redirect(path + "/")
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renderers = {"txt": render_txt, "md": render_md}
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@app.route("/")
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@app.route("/<path:path>")
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def main(path=""):
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# TODO: remove // and fix ..
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full_path = os.path.join(root, path)
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path = "/" + path
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file_type = path.split(".")[-1]
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try:
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return render_directory(os.listdir(full_path), path)
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except NotADirectoryError:
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if not file_type in allowed_file_types:
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return render(
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path,
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f"<h1>403 Forbidden</h1><p>{path}</p><p>Disallowed file type: <code>{file_type}</code>",
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show_print=False,
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status_code=403,
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)
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elif file_type in renderers:
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with open(full_path, "rb") as f:
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return renderers[file_type](f.read(), path)
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else:
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if path.endswith("/"):
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return flask.redirect(path[:-1])
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else:
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with open(full_path, "rb") as f:
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return flask.Response(
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f.read(),
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headers={
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"Content-Type": mimetypes.guess_type(full_path)[0]
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},
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)
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except FileNotFoundError:
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return render(
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path,
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f"<h1>404 Not Found</h1><p>{path}</p>",
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show_print=False,
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status_code=404,
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)
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