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WJDigby/copypasta.py

Created September 19, 2021 16:23
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Simple insecure webserver for transferring text and files between hosts
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copypasta.py
import base64
from datetime import datetime
from hashlib import md5
from math import ceil
import os
import web
from jinja2 import Environment, BaseLoader
# Tool is not designed for security, but might as disable this unless needed
web.config.debug = False
urls = ('/b64/.*$', 'B64',
'.*$', 'index')
TEMPLATE = """
<html>
<head>
<title>CopyPasta</title>
</head>
<body>
<style>
body{ font-family: 'Arial'}
a:link { color: black; }
a:visited { color: gray; }
</style>
<h2 id="header">Paste</h2>
<form action="./index" method="post">
<textarea id="text" name="text" rows="5" cols="30">{{ text }}</textarea>
<br><br>
<button name="paste" type="submit">Paste</button>
<button name="save_text" type="submit">Save text</button>
<button name="save_b64" type="submit">Save B64 file</button>
</form>
<pre>curl -F text="your text here" {{ host }}</pre>
<br>
<h2 id="header">Upload</h2>
<form action="./index" method="post" enctype="multipart/form-data">
<input type="file" id="file" name="upload">
<button type="submit">Upload</button>
</form>
<pre>curl -F upload=@/path/to/file {{ host }}</pre>
<br>
<h2 id="header">Download</h2>
{% if downloads %}
<table style="border-collapse: collapse;">
<tr>
<th>File</th>
<th>Download</th>
<th>Preview</th>
<th>To Base64</th>
<th>Size</th>
<th>Date</th>
<th>MD5</th>
</tr>
{% for filename, attrs in downloads.items() %}
<tr style="background-color: {{ loop.cycle('white', 'lightgray') }}">
<td style="padding: 10px;">{{ filename }}</td>
<td><a href="{{ attrs[0] }}" download>{{ download_icon }}</a></td>
<td><a href="{{ attrs[0] }}">{{ preview_icon }}</a></td>
<td><a href="./b64/{{ filename }}">{{ to_b64_icon }}</a></td>
<td>{{ attrs[1] }}</td>
<td>{{ attrs[2] }}</td>
<td>{{ attrs[3] }}</td>
</tr>
{% endfor %}
</table>
{% endif %}
</body>
</html>
"""
class B64:
""" Generate base64-encoded versions of files stored in the ./static/ directory.
Return to the user as a text blob in the browser."""
def GET(self):
file = web.ctx.env['PATH_INFO'].split('/')[-1]
if file in os.listdir('./static'):
with open('./static/' + file, 'rb') as f:
data = f.read()
b64_data = base64.b64encode(data)
web.header('Content-Type', 'text/plain')
return b64_data
raise web.seeother('/')
class index:
"""Handle all GET and POST requests other than those directed at /b64.
Displays current text held in "clipboard" and list of available downloads."""
def GET(self):
if not web.ctx.env['PATH_INFO'] == '/':
raise web.seeother('/')
host = web.ctx.env['HTTP_HOST']
download_icon = """
<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor" class="bi bi-download" viewBox="0 0 16 16" title="Download">
<path d="M.5 9.9a.5.5 0 0 1 .5.5v2.5a1 1 0 0 0 1 1h12a1 1 0 0 0 1-1v-2.5a.5.5 0 0 1 1 0v2.5a2 2 0 0 1-2 2H2a2 2 0 0 1-2-2v-2.5a.5.5 0 0 1 .5-.5z"/>
<path d="M7.646 11.854a.5.5 0 0 0 .708 0l3-3a.5.5 0 0 0-.708-.708L8.5 10.293V1.5a.5.5 0 0 0-1 0v8.793L5.354 8.146a.5.5 0 1 0-.708.708l3 3z"/>
<title>Download</title>
</svg>
"""
preview_icon = """
<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor" class="bi bi-eyeglasses" viewBox="0 0 16 16">
<path d="M4 6a2 2 0 1 1 0 4 2 2 0 0 1 0-4zm2.625.547a3 3 0 0 0-5.584.953H.5a.5.5 0 0 0 0 1h.541A3 3 0 0 0 7 8a1 1 0 0 1 2 0 3 3 0 0 0 5.959.5h.541a.5.5 0 0 0 0-1h-.541a3 3 0 0 0-5.584-.953A1.993 1.993 0 0 0 8 6c-.532 0-1.016.208-1.375.547zM14 8a2 2 0 1 1-4 0 2 2 0 0 1 4 0z"/>
<title>Preview</title>
</svg>
"""
to_b64_icon = """
<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor" class="bi bi-file-code" viewBox="0 0 16 16">
<path d="M6.646 5.646a.5.5 0 1 1 .708.708L5.707 8l1.647 1.646a.5.5 0 0 1-.708.708l-2-2a.5.5 0 0 1 0-.708l2-2zm2.708 0a.5.5 0 1 0-.708.708L10.293 8 8.646 9.646a.5.5 0 0 0 .708.708l2-2a.5.5 0 0 0 0-.708l-2-2z"/>
<path d="M2 2a2 2 0 0 1 2-2h8a2 2 0 0 1 2 2v12a2 2 0 0 1-2 2H4a2 2 0 0 1-2-2V2zm10-1H4a1 1 0 0 0-1 1v12a1 1 0 0 0 1 1h8a1 1 0 0 0 1-1V2a1 1 0 0 0-1-1z"/>
<title>Convert to Base64</title>
</svg>
"""
# Use a file in case app crashes, last pasted input remains
with open('clipboard', 'r') as f:
text = f.read()
downloads = {}
for download in os.listdir('./static'): # web.py automatically treats files in static directory as such
path = './static/' + download
size = os.stat(path).st_size
if size > 1024:
size = str(ceil(size / 1024)) + 'K'
else:
size = str(size) + 'B'
md5sum = md5(open(path, 'rb').read()).hexdigest()
ctime = datetime.fromtimestamp(os.stat(path).st_ctime).strftime('%d %b %Y %H:%M:%S')
downloads[download] = [path, size, ctime, md5sum]
# Sort the download list by date, descending
downloads = dict(sorted(downloads.items(), key=lambda item: item[1][2], reverse=True))
template = Environment(loader=BaseLoader).from_string(TEMPLATE)
return template.render(text=text,
host=host,
downloads=downloads,
download_icon=download_icon,
preview_icon=preview_icon,
to_b64_icon=to_b64_icon)
def POST(self):
# If user wants to simply paste text to the "clipboard"
# Use a file in case app crashes, last pasted input remains
if all([k in ['paste', 'text'] for k in web.input().keys()]):
text = web.input().get('text') # Don't care if it's empty
with open('clipboard', 'w') as f:
f.write(text)
raise web.seeother('/')
# If user wants to save pasted text to a text file
if all([k in ['save_text', 'text'] for k in web.input().keys()]):
text = web.input().get('text')
if text:
filename = datetime.now().strftime('%d%b%Y_%H%M%S.txt')
with open('./static/' + filename, 'w') as f:
f.write(text)
raise web.seeother('/')
else:
raise web.seeother('/')
# If user wants to save a Base64-encoded blob as a (decoded) file
if all([k in ['save_b64', 'text'] for k in web.input().keys()]):
text = web.input().get('text').encode()
if text:
filename = datetime.now().strftime('%d%b%Y_%H%M%S')
data = base64.b64decode(text)
with open('./static/' + filename, 'wb') as f:
f.write(data)
raise web.seeother('/')
else:
raise web.seeother('/')
file = web.input().get('upload')
if file:
ul = web.input(upload={})
storage_dir = './static'
if 'upload' in ul:
filepath = ul.upload.filename.replace('\\', '/')
filename = filepath.split('/')[-1]
file_out = open(storage_dir + '/' + filename, 'wb')
file_out.write(ul.upload.file.read())
raise web.seeother('/')
return
if __name__ == '__main__':
if not os.path.exists('./clipboard'):
with open('./clipboard', 'wb') as f:
f.write(b'')
if not os.path.exists('./static/'):
os.mkdir('./static')
app = web.application(urls, globals())
app.run()
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