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"""A small application that can be used to test a WSGI server and check
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it for WSGI compliance.
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"""
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from __future__ import annotations
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import os
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import sys
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import typing as t
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from textwrap import wrap
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from markupsafe import escape
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from . import __version__ as _werkzeug_version
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from .wrappers.request import Request
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from .wrappers.response import Response
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TEMPLATE = """\
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<!doctype html>
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<html lang=en>
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<title>WSGI Information</title>
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<style type="text/css">
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@import url(https://fonts.googleapis.com/css?family=Ubuntu);
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body { font-family: 'Lucida Grande', 'Lucida Sans Unicode', 'Geneva',
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'Verdana', sans-serif; background-color: white; color: #000;
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font-size: 15px; text-align: center; }
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div.box { text-align: left; width: 45em; margin: auto; padding: 50px 0;
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background-color: white; }
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h1, h2 { font-family: 'Ubuntu', 'Lucida Grande', 'Lucida Sans Unicode',
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'Geneva', 'Verdana', sans-serif; font-weight: normal; }
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h1 { margin: 0 0 30px 0; }
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h2 { font-size: 1.4em; margin: 1em 0 0.5em 0; }
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table { width: 100%%; border-collapse: collapse; border: 1px solid #AFC5C9 }
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table th { background-color: #AFC1C4; color: white; font-size: 0.72em;
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font-weight: normal; width: 18em; vertical-align: top;
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padding: 0.5em 0 0.1em 0.5em; }
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table td { border: 1px solid #AFC5C9; padding: 0.1em 0 0.1em 0.5em; }
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code { font-family: 'Consolas', 'Monaco', 'Bitstream Vera Sans Mono',
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monospace; font-size: 0.7em; }
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ul li { line-height: 1.5em; }
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ul.path { font-size: 0.7em; margin: 0 -30px; padding: 8px 30px;
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list-style: none; background: #E8EFF0; }
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ul.path li { line-height: 1.6em; }
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li.virtual { color: #999; text-decoration: underline; }
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li.exp { background: white; }
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</style>
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<div class="box">
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<h1>WSGI Information</h1>
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<p>
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This page displays all available information about the WSGI server and
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the underlying Python interpreter.
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<h2 id="python-interpreter">Python Interpreter</h2>
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<table>
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<tr>
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<th>Python Version
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<td>%(python_version)s
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<tr>
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<th>Platform
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<td>%(platform)s [%(os)s]
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<tr>
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<th>API Version
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<td>%(api_version)s
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<tr>
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<th>Byteorder
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<td>%(byteorder)s
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<tr>
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<th>Werkzeug Version
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<td>%(werkzeug_version)s
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</table>
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<h2 id="wsgi-environment">WSGI Environment</h2>
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<table>%(wsgi_env)s</table>
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<h2 id="installed-eggs">Installed Eggs</h2>
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<p>
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The following python packages were installed on the system as
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Python eggs:
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<ul>%(python_eggs)s</ul>
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<h2 id="sys-path">System Path</h2>
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<p>
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The following paths are the current contents of the load path. The
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following entries are looked up for Python packages. Note that not
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all items in this path are folders. Gray and underlined items are
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entries pointing to invalid resources or used by custom import hooks
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such as the zip importer.
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<p>
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Items with a bright background were expanded for display from a relative
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path. If you encounter such paths in the output you might want to check
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your setup as relative paths are usually problematic in multithreaded
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environments.
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<ul class="path">%(sys_path)s</ul>
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</div>
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"""
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def iter_sys_path() -> t.Iterator[tuple[str, bool, bool]]:
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if os.name == "posix":
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def strip(x: str) -> str:
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prefix = os.path.expanduser("~")
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if x.startswith(prefix):
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x = f"~{x[len(prefix) :]}"
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return x
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else:
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def strip(x: str) -> str:
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return x
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cwd = os.path.abspath(os.getcwd())
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for item in sys.path:
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path = os.path.join(cwd, item or os.path.curdir)
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yield strip(os.path.normpath(path)), not os.path.isdir(path), path != item
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@Request.application
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def test_app(req: Request) -> Response:
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"""Simple test application that dumps the environment. You can use
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it to check if Werkzeug is working properly:
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.. sourcecode:: pycon
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>>> from werkzeug.serving import run_simple
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>>> from werkzeug.testapp import test_app
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>>> run_simple('localhost', 3000, test_app)
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* Running on http://localhost:3000/
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The application displays important information from the WSGI environment,
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the Python interpreter and the installed libraries.
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"""
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try:
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import pkg_resources
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except ImportError:
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eggs: t.Iterable[t.Any] = ()
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else:
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eggs = sorted(
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pkg_resources.working_set,
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key=lambda x: x.project_name.lower(),
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)
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python_eggs = []
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for egg in eggs:
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try:
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version = egg.version
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except (ValueError, AttributeError):
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version = "unknown"
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python_eggs.append(
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f"<li>{escape(egg.project_name)} <small>[{escape(version)}]</small>"
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)
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wsgi_env = []
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sorted_environ = sorted(req.environ.items(), key=lambda x: repr(x[0]).lower())
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for key, value in sorted_environ:
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value = "".join(wrap(str(escape(repr(value)))))
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wsgi_env.append(f"<tr><th>{escape(key)}<td><code>{value}</code>")
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sys_path = []
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for item, virtual, expanded in iter_sys_path():
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class_ = []
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if virtual:
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class_.append("virtual")
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if expanded:
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class_.append("exp")
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class_ = f' class="{" ".join(class_)}"' if class_ else ""
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sys_path.append(f"<li{class_}>{escape(item)}")
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context = {
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"python_version": "<br>".join(escape(sys.version).splitlines()),
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"platform": escape(sys.platform),
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"os": escape(os.name),
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"api_version": sys.api_version,
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"byteorder": sys.byteorder,
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"werkzeug_version": _werkzeug_version,
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"python_eggs": "\n".join(python_eggs),
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"wsgi_env": "\n".join(wsgi_env),
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"sys_path": "\n".join(sys_path),
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}
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return Response(TEMPLATE % context, mimetype="text/html")
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if __name__ == "__main__":
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from .serving import run_simple
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run_simple("localhost", 5000, test_app, use_reloader=True)
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