2014-06-03 18:32:44 +00:00
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#!/usr/bin/env python
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2017-11-30 18:33:11 +00:00
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# Copyright 2012 - 2017, New York University and the TUF contributors
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# SPDX-License-Identifier: MIT OR Apache-2.0
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2022-01-12 13:28:34 +00:00
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"""Simple HTTP server for python-tuf tests"""
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2014-03-31 22:28:54 +00:00
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2021-04-08 11:24:54 +00:00
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import socketserver
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from http.server import SimpleHTTPRequestHandler
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Fix failing AppVeyor Python2.7 tests
Since #885 the tests in TestUpdater and TestKeyRevocation fail on
Appveyor Python 2.7 builds. After some live debugging, it turns out
that the tests fail due to the extra amount of http requests to
the simple http server (see tests/simple_server.py) that were
added in #885.
The simple server runs in a subprocess and is re-used for the
entire TestCase. After a certain amount of requests it becomes
unresponsive. Note that neither the subprocess exits (ps -W), nor
does the port get closed (netstat -a). It just doesn't serve the
request, making it time out and fail the test.
The following script can be used to reproduce the issue (run in
tests directory):
```python
import subprocess
import requests
import random
counter = 0
port = random.randint(30000, 45000)
command = ['python', 'simple_server.py', str(port)]
server_process = subprocess.Popen(command, stderr=subprocess.PIPE)
url = 'http://localhost:'+str(port) + '/'
sess = requests.Session()
try:
while True:
sess.get(url, timeout=3)
counter +=1
finally:
print(counter)
server_process.kill()
```
It fails repeatedly on the 69th request, but only if
`stderr=subprocess.PIPE` is passed to Popen. Given that for each
request the simple server writes about ~60 characters to stderr,
e.g. ...
```
127.0.0.1 - - [24/Feb/2020 12:01:23] "GET / HTTP/1.1" 200 -
```
... it looks a lot like a full pipe buffer of size 4096. Note that the
`bufsize` argument to Popen does not change anything.
As a simple work around we silence the test server on
Windows/Python2 to not fill the buffer.
Signed-off-by: Lukas Puehringer <lukas.puehringer@nyu.edu>
2020-02-24 13:51:28 +00:00
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2020-08-03 15:59:17 +00:00
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# Allow re-use so you can re-run tests as often as you want even if the
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# tests re-use ports. Otherwise TCP TIME-WAIT prevents reuse for ~1 minute
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2021-04-08 11:24:54 +00:00
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socketserver.TCPServer.allow_reuse_address = True
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2014-03-31 22:28:54 +00:00
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2022-01-12 13:28:34 +00:00
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httpd = socketserver.TCPServer(("localhost", 0), SimpleHTTPRequestHandler)
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2021-12-03 15:23:42 +00:00
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port_message = "bind succeeded, server port is: " + str(httpd.server_address[1])
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2020-10-27 15:28:01 +00:00
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print(port_message)
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2014-03-31 22:28:54 +00:00
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httpd.serve_forever()
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