Release 0.5.4

servefile still works with python3.6, we just no longer test this.

.github/workflows/run-tox.yml

@@ -0,0 +1,37 @@
+name: Run Tox
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python: [2.7, 3.7, 3.8, 3.9, "3.10", 3.11]
+
+    steps:
+      - uses: actions/checkout@v2
+      - name: Setup Python
+        uses: actions/setup-python@v2
+        with:
+          python-version: ${{ matrix.python }}
+      - name: Install Tox
+        run: pip install tox
+      - name: Run Tox
+        run: tox -e py
+  pep8:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Setup python
+        uses: actions/setup-python@v2
+        with:
+          python-version: 3.9
+      - name: Install Tox
+        run: pip install tox
+      - name: Run Tox pep8
+        run: "tox -e pep8"

ChangeLog

@@ -1,6 +1,63 @@
 servefile changelog
 ===================
 
+2023-01-23 v0.5.4
+-----------------
+
+	0.5.4 released
+
+	* code reformatting for better maintainability
+	* upload to uploaddir instead of /tmp for large files
+	* add python3.10 / python3.11 support
+	* drop python3.6 support
+
+
+2021-11-18 v0.5.3
+-----------------
+
+	0.5.3 released
+
+	* improved test performance
+
+
+2021-09-08 v0.5.2
+-----------------
+
+	0.5.2 released
+
+	* fixed bug where exception was shown on transmission abort with python3
+	* fixed wrong/outdated pyopenssl package names
+	* tests are now using a free non-default port to avoid clashes; if
+	  wished the ports can be set from outside by specifying the
+	  environment variables SERVEFILE_DEFAULT_PORT and
+	  SERVEFILE_SECONDARY_PORT
+	* fixed broken redirect when filename contained umlauts or other characters
+	  that should have been quoted
+	* fixed broken special char handling in directory listing for python2
+	* drop python3.5 support
+	* fixed PUT uploads with python3 and documented PUT-uploads with curl
+
+
+2020-10-30 v0.5.1
+-----------------
+
+	0.5.1 released
+
+	* version bump for broken pypi release
+
+
+2020-10-29 v0.5.0
+-----------------
+
+	0.5.0 released
+
+	* python3 support
+	* test suite
+	* fixed an endless redirect loop when serving ../
+	* added sorting for list view
+	* added lzma/xz as compression method
+
+
 2015-11-10 v0.4.4
 -----------------
 

README.md

@@ -0,0 +1,33 @@
+Servefile
+=========
+
+Serve files from shell via a small HTTP server. The server redirects all HTTP
+requests to the file, so only IP and port must be given to another user to
+access the file. Its main purpose is to quickly send a file to users in your
+local network, independent of their current setup (OS/software). Besides that
+it also supports uploads, SSL, HTTP basic auth and directory listings.
+
+Features:
+ * serve single file
+ * serve a directory with directory index
+ * file upload via webinterface
+ * HTTPS with on the fly generated self signed SSL certificates
+ * HTTP basic authentication
+ * serving files/directories as on request generated tar files
+
+Install
+-------
+
+Via pip
+```shell
+pip install servefile
+```
+After installation either execute `servefile --help` or `python -m servefile --help`
+
+Standalone:
+If you don't have pip available just copy `servefile/servefile.py` onto the target machine, make it executable and you are ready to go.
+```shell
+$ wget https://raw.githubusercontent.com/sebageek/servefile/master/servefile/servefile.py -O servefile
+$ chmod +x servefile
+$ ./servefile --help
+```

servefile.1

@@ -1,4 +1,4 @@
-.TH SERVEFILE 1 "November 2015" "servefile 0.4.4" "User Commands"
+.TH SERVEFILE 1 "January 2023" "servefile 0.5.4" "User Commands"
 
 .SH NAME
 servefile \- small HTTP-Server for temporary file transfer
@@ -28,8 +28,8 @@ In upload mode with \fB\-u\fR servefile creates a directory and saves all
 uploaded files into that directory. When uploading with curl or wget the
 filename is extracted from the path part of the url used for the upload.
 
-For SSL support python-openssl (pyssl) needs to be installed. If no key and
-cert is given, servefile will generate a key pair for you and display its
+For SSL support pyopenssl (python3-openssl) needs to be installed. If no key
+and cert is given, servefile will generate a key pair for you and display its
 fingerprint.
 
 In \fB--tar\fR mode the given file or directory will be packed on (each)

servefile/servefile.py

@@ -7,11 +7,10 @@
 
 from __future__ import print_function
 
-__version__ = '0.4.4'
+__version__ = '0.5.4'
 
 import argparse
 import base64
-import cgi
 import datetime
 import io
 import mimetypes
@@ -21,7 +20,9 @@ import select
 import socket
 from subprocess import Popen, PIPE
 import sys
+import tempfile
 import time
+import warnings
 
 # fix imports for python2/python3
 try:
@@ -42,11 +43,18 @@ try:
 except ImportError:
     pass
 
+with warnings.catch_warnings():
+    warnings.filterwarnings("ignore", category=DeprecationWarning)
+    # scheduled for removal in python3.13, used for FieldStorage
+    import cgi
+
+
 def getDateStrNow():
     """ Get the current time formatted for HTTP header """
     now = datetime.datetime.fromtimestamp(time.mktime(time.gmtime()))
     return now.strftime("%a, %d %b %Y %H:%M:%S GMT")
 
+
 class FileBaseHandler(BaseHTTPServer.BaseHTTPRequestHandler):
     fileName = None
     blockSize = 1024 * 1024
@@ -60,7 +68,7 @@ class FileBaseHandler(BaseHTTPServer.BaseHTTPRequestHandler):
             fileName = self.fileName
         if unquote(self.path) != "/" + fileName:
             self.send_response(302)
-			self.send_header('Location', '/' + fileName)
+            self.send_header('Location', '/' + quote(fileName))
             self.end_headers()
             return True
         return False
@@ -141,7 +149,7 @@ class FileBaseHandler(BaseHTTPServer.BaseHTTPRequestHandler):
             # now we can wind the file *brrrrrr*
             myfile.seek(fromto[0])
 
-		if fromto != None:
+        if fromto is not None:
             self.send_response(216)
             self.send_header('Content-Range', 'bytes %d-%d/%d' % (fromto[0], fromto[1], fileLength))
             fileLength = fromto[1] - fromto[0] + 1
@@ -246,7 +254,7 @@ class TarFileHandler(FileBaseHandler):
         # give the process a short time to find out if it can
         # pack/compress the file
         time.sleep(0.05)
-		if tarCmd.poll() != None and tarCmd.poll() != 0:
+        if tarCmd.poll() is not None and tarCmd.poll() != 0:
             # something went wrong
             print("Error while compressing '%s'. Aborting request." % self.target)
             self.send_response(500)
@@ -416,7 +424,7 @@ class DirListingHandler(FileBaseHandler):
             </tr>
         </thead>
         <tbody>
-		""" % {'path': os.path.normpath(unquote(self.path))}
+        """ % {'path': os.path.normpath(unquote(self.path))}  # noqa: E501
         footer = """</tbody></table></div>
 <div class="footer"><a href="http://seba-geek.de/stuff/servefile/">servefile %(version)s</a></div>
 <script>
@@ -524,10 +532,7 @@ class DirListingHandler(FileBaseHandler):
             target_items.append((item, itemPath, stat))
 
         # Directories first, then files
-		for (tuple_list, is_dir) in (
-				(dir_items, True),
-				(file_items, False),
-				):
+        for (tuple_list, is_dir) in ((dir_items, True), (file_items, False)):
             for (item, itemPath, stat) in tuple_list:
                 self._appendToListing(content, item, itemPath, stat, is_dir=is_dir)
 
@@ -542,7 +547,9 @@ class DirListingHandler(FileBaseHandler):
         self.send_header("Content-Length", str(len(listing)))
         self.send_header('Connection', 'close')
         self.end_headers()
-		self.wfile.write(listing.encode())
+        if sys.version_info.major >= 3:
+            listing = listing.encode()
+        self.wfile.write(listing)
 
     def convertSize(self, size):
         for ext in "KMGT":
@@ -607,8 +614,25 @@ class FilePutter(BaseHTTPServer.BaseHTTPRequestHandler):
         # create FieldStorage object for multipart parsing
         env = os.environ
         env['REQUEST_METHOD'] = "POST"
-		fstorage = cgi.FieldStorage(fp=self.rfile, headers=self.headers, environ=env)
-		if not "file" in fstorage:
+        targetDir = self.targetDir
+
+        class CustomFieldStorage(cgi.FieldStorage):
+
+            def make_file(self, *args, **kwargs):
+                """Overwritten to use a named file and the upload directory
+
+                Python 2.7 has an unused "binary" argument while Python 3 does
+                not have any arguments. Python 2.7 does not have a
+                self._binary_file attribute.
+                """
+                if sys.version_info.major == 2 or self._binary_file:
+                    return tempfile.NamedTemporaryFile("wb+", dir=targetDir)
+                else:
+                    return tempfile.NamedTemporaryFile(
+                        "w+", encoding=self.encoding, newline='\n', dir=targetDir)
+
+        fstorage = CustomFieldStorage(fp=self.rfile, headers=self.headers, environ=env)
+        if "file" not in fstorage:
             self.sendResponse(400, "No file found in request.")
             return
 
@@ -617,7 +641,14 @@ class FilePutter(BaseHTTPServer.BaseHTTPRequestHandler):
             self.sendResponse(400, "Filename was empty or invalid")
             return
 
-		# write file down to disk, send a 200 afterwards
+        # put the file at the right place, send 200 afterwards
+        if getattr(fstorage["file"].file, "name", None):
+            # the sent file was large, so we can just hard link the temporary
+            # file and are done
+            os.link(fstorage["file"].file.name, destFileName)
+        else:
+            # write file to disk. it was small enough so no temporary file was
+            # created
             target = open(destFileName, "wb")
             bytesLeft = length
             while bytesLeft > 0:
@@ -635,7 +666,7 @@ class FilePutter(BaseHTTPServer.BaseHTTPRequestHandler):
         http://host:8080/testfile will cause the file to be named testfile. If
         no filename is given, a random name will be generated.
 
-		Files can be uploaded with e.g. curl -X POST -d @file <url> .
+        Files can be uploaded with e.g. curl -T file <url> .
         """
         length = self.getContentLength()
         if length < 0:
@@ -652,11 +683,11 @@ class FilePutter(BaseHTTPServer.BaseHTTPRequestHandler):
             return
 
         # Sometimes clients want to be told to continue with their transfer
-		if self.headers.getheader("Expect") == "100-continue":
+        if self.headers.get("Expect") == "100-continue":
             self.send_response(100)
             self.end_headers()
 
-		target = open(cleanFileName, "w")
+        target = open(cleanFileName, "wb")
         bytesLeft = int(self.headers['Content-Length'])
         while bytesLeft > 0:
             bytesToRead = min(self.blockSize, bytesLeft)
@@ -675,7 +706,8 @@ class FilePutter(BaseHTTPServer.BaseHTTPRequestHandler):
             self.sendResponse(411, "Content-Length was invalid or not set.")
             return -1
         if self.maxUploadSize > 0 and length > self.maxUploadSize:
-			self.sendResponse(413, "Your file was too big! Maximum allowed size is %d byte. <a href=\"/\">back</a>" % self.maxUploadSize)
+            self.sendResponse(413, "Your file was too big! Maximum allowed size is %d byte. <a href=\"/\">back</a>" %
+                                   self.maxUploadSize)
             return -1
         return length
 
@@ -712,9 +744,11 @@ class FilePutter(BaseHTTPServer.BaseHTTPRequestHandler):
             return extraDestFileName
         # never reached
 
+
 class ThreadedHTTPServer(SocketServer.ThreadingMixIn, BaseHTTPServer.HTTPServer):
     def handle_error(self, request, client_address):
-		print("%s ABORTED transmission (Reason: %s)" % (client_address[0], sys.exc_value))
+        _, exc_value, _ = sys.exc_info()
+        print("%s ABORTED transmission (Reason: %s)" % (client_address[0], exc_value))
 
 
 def catchSSLErrors(BaseSSLClass):
@@ -786,6 +820,7 @@ class SecureHandler():
             self.rfile = socket._fileobject(self.request, "rb", self.rbufsize)
             self.wfile = socket._fileobject(self.request, "wb", self.wbufsize)
 
+
 class ServeFileException(Exception):
     pass
 
@@ -810,7 +845,8 @@ class ServeFile():
 
         if self.serveMode not in range(self._NUM_MODES):
             self.serveMode = None
-			raise ValueError("Unknown serve mode, needs to be MODE_SINGLE, MODE_SINGLETAR, MODE_UPLOAD or MODE_DIRLIST.")
+            raise ValueError("Unknown serve mode, needs to be MODE_SINGLE, "
+                             "MODE_SINGLETAR, MODE_UPLOAD or MODE_DIRLIST.")
 
     def setIPv4(self, ipv4):
         """ En- or disable ipv4 """
@@ -824,23 +860,23 @@ class ServeFile():
         """ Get IPs from all interfaces via ip or ifconfig. """
         # ip and ifconfig sometimes are located in /sbin/
         os.environ['PATH'] += ':/sbin:/usr/sbin'
-		proc = Popen(r"ip addr|" + \
-					  "sed -n -e 's/.*inet6\{0,1\} \([0-9.a-fA-F:]\+\).*/\\1/ p'|" + \
-					  "grep -v '^fe80\|^127.0.0.1\|^::1'", \
+        proc = Popen(r"ip addr|"
+                     r"sed -n -e 's/.*inet6\{0,1\} \([0-9.a-fA-F:]\+\).*/\1/ p'|"
+                     r"grep -v '^fe80\|^127.0.0.1\|^::1'",
                      shell=True, stdout=PIPE, stderr=PIPE)
         if proc.wait() != 0:
             # ip failed somehow, falling back to ifconfig
             oldLang = os.environ.get("LC_ALL", None)
             os.environ['LC_ALL'] = "C"
-			proc = Popen(r"ifconfig|" + \
-						  "sed -n 's/.*inet6\{0,1\}\( addr:\)\{0,1\} \{0,1\}\([0-9a-fA-F.:]*\).*/" + \
-						  "\\2/p'|" + \
-						  "grep -v '^fe80\|^127.0.0.1\|^::1'", \
+            proc = Popen(r"ifconfig|"
+                         r"sed -n 's/.*inet6\{0,1\}\( addr:\)\{0,1\} \{0,1\}\([0-9a-fA-F.:]*\).*/"
+                         r"\2/p'|"
+                         r"grep -v '^fe80\|^127.0.0.1\|^::1'",
                          shell=True, stdout=PIPE, stderr=PIPE)
             if oldLang:
                 os.environ['LC_ALL'] = oldLang
             else:
-				del(os.environ['LC_ALL'])
+                del os.environ['LC_ALL']
             if proc.wait() != 0:
                 # we couldn't find any ip address
                 proc = None
@@ -857,7 +893,7 @@ class ServeFile():
         return None
 
     def setSSLKeys(self, cert, key):
-		""" Set SSL cert/key. Can be either path to file or pyssl X509/PKey object. """
+        """ Set SSL cert/key. Can be either path to file or pyopenssl X509/PKey object. """
         self.cert = cert
         self.key = key
 
@@ -883,7 +919,7 @@ class ServeFile():
         req = crypto.X509Req()
         subj = req.get_subject()
         subj.CN = "127.0.0.1"
-		subj.O = "servefile laboratories"
+        subj.O = "servefile laboratories"  # noqa: E741
         subj.OU = "servefile"
 
         # generate altnames
@@ -948,7 +984,8 @@ class ServeFile():
                 server = SecureThreadedHTTPServer(self._getCert(), self._getKey(),
                                                   (listenIp, self.port), handler, bind_and_activate=False)
             except SSL.Error as e:
-				raise ServeFileException("SSL error: Could not read SSL public/private key from file(s) (error was: \"%s\")" % (e[0][0][2],))
+                raise ServeFileException("SSL error: Could not read SSL public/private key "
+                                         "from file(s) (error was: \"%s\")" % (e[0][0][2],))
         else:
             server = ThreadedHTTPServer((listenIp, self.port), handler,
                                         bind_and_activate=False)
@@ -981,7 +1018,7 @@ class ServeFile():
             print("Serving \"%s\" for uploads at port %d." % (self.target, self.port))
 
         # print urls with local network adresses
-		print("\nSome addresses %s will be available at:" % \
+        print("\nSome addresses %s will be available at:" %
               ("this file" if (self.serveMode != self.MODE_UPLOAD) else "the uploadform", ))
         ips = self.getIPs()
         if not ips or len(ips) == 0 or ips[0] == '':
@@ -1038,7 +1075,8 @@ class ServeFile():
                 try:
                     os.mkdir(self.target)
                 except (IOError, OSError) as e:
-					raise ServeFileException("Error: Could not create directory '%s' for uploads, %r" % (self.target, str(e)))
+                    raise ServeFileException("Error: Could not create directory '%s' for uploads, %r" %
+                                             (self.target, str(e)))
             else:
                 raise ServeFileException("Error: Upload directory already exists and is a file.")
             FilePutter.targetDir = os.path.abspath(self.target)
@@ -1057,6 +1095,7 @@ class ServeFile():
             AuthenticationHandler.authString = self.auth
             if self.authrealm:
                 AuthenticationHandler.realm = self.authrealm
+
             class AuthenticatedHandler(AuthenticationHandler, handler):
                 pass
             handler = AuthenticatedHandler
@@ -1102,7 +1141,8 @@ class AuthenticationHandler():
             self.send_response(401)
             self.send_header("WWW-Authenticate", "Basic realm=\"%s\"" % self.realm)
             self.send_header("Connection", "close")
-			errorMsg = "<html><head><title>401 - Unauthorized</title></head><body><h1>401 - Unauthorized</h1></body></html>"
+            errorMsg = ("<html><head><title>401 - Unauthorized</title></head>"
+                        "<body><h1>401 - Unauthorized</h1></body></html>")
             self.send_header("Content-Length", str(len(errorMsg)))
             self.end_headers()
             self.wfile.write(errorMsg.encode())
@@ -1112,32 +1152,35 @@ def main():
     parser = argparse.ArgumentParser(prog='servefile', description='Serve a single file via HTTP.')
     parser.add_argument('--version', action='version', version='%(prog)s ' + __version__)
     parser.add_argument('target', metavar='file/directory', type=str)
-	parser.add_argument('-p', '--port', type=int, default=8080, \
+    parser.add_argument('-p', '--port', type=int, default=8080,
                         help='Port to listen on')
-	parser.add_argument('-u', '--upload', action="store_true", default=False, \
+    parser.add_argument('-u', '--upload', action="store_true", default=False,
                         help="Enable uploads to a given directory")
-	parser.add_argument('-s', '--max-upload-size', type=str, \
+    parser.add_argument('-s', '--max-upload-size', type=str,
                         help="Limit upload size in kB. Size modifiers are allowed, e.g. 2G, 12MB, 1B")
-	parser.add_argument('-l', '--list-dir', action="store_true", default=False, \
+    parser.add_argument('-l', '--list-dir', action="store_true", default=False,
                         help="Show directory indexes and allow access to all subdirectories")
-	parser.add_argument('--ssl', action="store_true", default=False, \
+    parser.add_argument('--ssl', action="store_true", default=False,
                         help="Enable SSL. If no key/cert is specified one will be generated")
-	parser.add_argument('--key', type=str, \
-	                    help="Keyfile to use for SSL. If no cert is given with --cert the keyfile will also be searched for a cert")
-	parser.add_argument('--cert', type=str, \
+    parser.add_argument('--key', type=str,
+                        help="Keyfile to use for SSL. If no cert is given with --cert the keyfile "
+                             "will also be searched for a cert")
+    parser.add_argument('--cert', type=str,
                         help="Certfile to use for SSL")
-	parser.add_argument('-a', '--auth', type=str, metavar='user:password', \
+    parser.add_argument('-a', '--auth', type=str, metavar='user:password',
                         help="Set user and password for HTTP basic authentication")
-	parser.add_argument('--realm', type=str, default=None,\
+    parser.add_argument('--realm', type=str, default=None,
                         help="Set a realm for HTTP basic authentication")
-	parser.add_argument('-t', '--tar', action="store_true", default=False, \
-	                    help="Enable on the fly tar creation for given file or directory. Note: Download continuation will not be available")
-	parser.add_argument('-c', '--compression', type=str, metavar='method', \
-	                    default="none", \
-	                    help="Set compression method, only in combination with --tar. Can be one of %s" % ", ".join(TarFileHandler.compressionMethods))
-	parser.add_argument('-4', '--ipv4-only', action="store_true", default=False, \
+    parser.add_argument('-t', '--tar', action="store_true", default=False,
+                        help="Enable on the fly tar creation for given file or directory. "
+                             "Note: Download continuation will not be available")
+    parser.add_argument('-c', '--compression', type=str, metavar='method',
+                        default="none",
+                        help="Set compression method, only in combination with --tar. "
+                             "Can be one of %s" % ", ".join(TarFileHandler.compressionMethods))
+    parser.add_argument('-4', '--ipv4-only', action="store_true", default=False,
                         help="Listen on IPv4 only")
-	parser.add_argument('-6', '--ipv6-only', action="store_true", default=False, \
+    parser.add_argument('-6', '--ipv6-only', action="store_true", default=False,
                         help="Listen on IPv6 only")
 
     args = parser.parse_args()
@@ -1153,7 +1196,7 @@ def main():
         sys.exit(1)
 
     if args.max_upload_size:
-		sizeRe = re.match("^(\d+(?:[,.]\d+)?)(?:([bkmgtpe])(?:(?<!b)b?)?)?$", args.max_upload_size.lower())
+        sizeRe = re.match(r"^(\d+(?:[,.]\d+)?)(?:([bkmgtpe])(?:(?<!b)b?)?)?$", args.max_upload_size.lower())
         if not sizeRe:
             print("Error: Your max upload size param is broken. Try something like 3M or 2.5Gb.")
             sys.exit(1)
@@ -1166,7 +1209,7 @@ def main():
             sys.exit(1)
 
     if args.ssl and not HAVE_SSL:
-		print("Error: SSL is not available, please install pyssl (python-openssl).")
+        print("Error: SSL is not available, please install pyopenssl (python3-openssl).")
         sys.exit(1)
 
     if args.cert and not args.key:
@@ -1180,7 +1223,8 @@ def main():
     if args.auth:
         dpos = args.auth.find(":")
         if dpos <= 0 or dpos == (len(args.auth) - 1):
-			print("Error: User and password for HTTP basic authentication need to be both at least one character and have to be separated by a \":\".")
+            print("Error: User and password for HTTP basic authentication need to be both "
+                  "at least one character and have to be separated by a \":\".")
             sys.exit(1)
 
     if args.realm and not args.auth:
@@ -1251,4 +1295,3 @@ def main():
 
 if __name__ == '__main__':
     main()
-

setup.py

@@ -2,14 +2,18 @@
 
 from setuptools import setup
 
+with open("README.md") as f:
+    long_description = f.read()
+
 setup(
     name='servefile',
     description='Serve files from shell via a small HTTP server',
-    long_description='Serve files from shell via a small HTTP server. The server redirects all HTTP requests to the file, so only IP and port must be given to another user to access the file. Its main purpose is to quickly send a file to users in your local network, independent of their current setup (OS/software). Beneath that it also supports uploads, SSL, HTTP basic auth and directory listings.',
+    long_description=long_description,
+    long_description_content_type='text/markdown',
     platforms='posix',
-    version='0.4.4',
+    version='0.5.4',
     license='GPLv3 or later',
-    url='https://seba-geek.de/stuff/servefile/',
+    url='https://github.com/sebageek/servefile/',
     author='Sebastian Lohff',
     author_email='seba@someserver.de',
     install_requires=['pyopenssl'],
@@ -34,9 +38,11 @@ setup(
         'Programming Language :: Python :: 2',
         'Programming Language :: Python :: 2.7',
         'Programming Language :: Python :: 3',
-        'Programming Language :: Python :: 3.6',
         'Programming Language :: Python :: 3.7',
         'Programming Language :: Python :: 3.8',
+        'Programming Language :: Python :: 3.9',
+        'Programming Language :: Python :: 3.10',
+        'Programming Language :: Python :: 3.11',
         'Topic :: Communications',
         'Topic :: Communications :: File Sharing',
         'Topic :: Internet',

tests/test_servefile.py

@@ -1,3 +1,4 @@
+# -*- coding: utf-8 -*-
 import io
 import os
 import pytest
@@ -8,18 +9,36 @@ import sys
 import tarfile
 import time
 import urllib3
+from requests.exceptions import ConnectionError
 
 # crudly written to learn more about pytest and to have a base for refactoring
 
 
 if sys.version_info.major >= 3:
     from pathlib import Path
+    from urllib.parse import quote
     connrefused_exc = ConnectionRefusedError
 else:
     from pathlib2 import Path
+    from urllib import quote
     connrefused_exc = socket.error
 
 
+def _get_port_from_env(var_name, default):
+    port = int(os.environ.get(var_name, default))
+    if port == 0:
+        # do a one-time port selection for a free port, use it for all tests
+        s = socket.socket()
+        s.bind(('', 0))
+        port = s.getsockname()[1]
+        s.close()
+    return port
+
+
+SERVEFILE_DEFAULT_PORT = _get_port_from_env('SERVEFILE_DEFAULT_PORT', 0)
+SERVEFILE_SECONDARY_PORT = _get_port_from_env('SERVEFILE_SECONDARY_PORT', 0)
+
+
 @pytest.fixture
 def run_servefile():
     instances = []
@@ -34,9 +53,12 @@ def run_servefile():
             # call servefile as python module
             servefile_path = ['-m', 'servefile']
 
+        # use non-default default port, if one is given via env (and none via args)
+        if '-p' not in args and '--port' not in args:
+            args.extend(['-p', str(SERVEFILE_DEFAULT_PORT)])
+
         print("running {} with args {}".format(", ".join(servefile_path), args))
         p = subprocess.Popen([sys.executable] + servefile_path + args, **kwargs)
-        time.sleep(kwargs.get('timeout', 0.3))
         instances.append(p)
 
         return p
@@ -62,22 +84,26 @@ def datadir(tmp_path):
                 _datadir(v, new_path)
             else:
                 if hasattr(v, 'decode'):
-                    v = v.decode()  # python2 compability
+                    v = v.decode('utf-8')  # python2 compability
                 (path / k).write_text(v)
 
         return path
     return _datadir
 
 
-def make_request(path='/', host='localhost', port=8080, method='get', protocol='http', **kwargs):
+def make_request(path='/', host='localhost', port=SERVEFILE_DEFAULT_PORT, method='get', protocol='http',
+                 encoding='utf-8', **kwargs):
     url = '{}://{}:{}{}'.format(protocol, host, port, path)
     print('Calling {} on {} with {}'.format(method, url, kwargs))
     r = getattr(requests, method)(url, **kwargs)
 
+    if r.encoding is None and encoding:
+        r.encoding = encoding
+
     return r
 
 
-def check_download(expected_data=None, path='/', fname=None, status_code=200, **kwargs):
+def check_download(expected_data=None, path='/', fname=None, **kwargs):
     if fname is None:
         fname = os.path.basename(path)
     r = make_request(path, **kwargs)
@@ -91,6 +117,22 @@ def check_download(expected_data=None, path='/', fname=None, status_code=200, **
     return r  # for additional tests
 
 
+def _retry_while(exception, function, timeout=2):
+    now = time.time  # float seconds since epoch
+
+    def wrapped(*args, **kwargs):
+        timeout_after = now() + timeout
+        while True:
+            try:
+                return function(*args, **kwargs)
+            except exception:
+                if now() >= timeout_after:
+                    raise
+                time.sleep(0.1)
+
+    return wrapped
+
+
 def _test_version(run_servefile, standalone):
     # we expect the version on stdout (python3.4+) or stderr(python2.6-3.3)
     s = run_servefile('--version', standalone=standalone, stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
@@ -104,7 +146,7 @@ def _test_version(run_servefile, standalone):
         version = s.stdout.readline().decode().strip()
 
     # hardcode version as string until servefile is a module
-    assert version == 'servefile 0.4.4'
+    assert version == 'servefile 0.5.4'
 
 
 def test_version(run_servefile):
@@ -121,7 +163,7 @@ def test_correct_headers(run_servefile, datadir):
     p = datadir({'testfile': data}) / 'testfile'
     run_servefile(str(p))
 
-    r = make_request()
+    r = _retry_while(ConnectionError, make_request)()
     assert r.status_code == 200
     assert r.headers.get('Content-Type') == 'application/octet-stream'
     assert r.headers.get('Content-Disposition') == 'attachment; filename="testfile"'
@@ -134,7 +176,7 @@ def test_redirect_and_download(run_servefile, datadir):
     run_servefile(str(p))
 
     # redirect
-    r = make_request(allow_redirects=False)
+    r = _retry_while(ConnectionError, make_request)(allow_redirects=False)
     assert r.status_code == 302
     assert r.headers.get('Location') == '/testfile'
 
@@ -142,12 +184,29 @@ def test_redirect_and_download(run_servefile, datadir):
     check_download(data, fname='testfile')
 
 
+def test_redirect_and_download_with_umlaut(run_servefile, datadir):
+    data = "NÖÖT NÖÖT"
+    filename = "tästføile"
+    p = datadir({filename: data}) / filename
+    run_servefile(str(p))
+
+    # redirect
+    r = _retry_while(ConnectionError, make_request)(allow_redirects=False)
+    assert r.status_code == 302
+    assert r.headers.get('Location') == '/{}'.format(quote(filename))
+
+    # normal download
+    if sys.version_info.major < 3:
+        data = unicode(data, 'utf-8')
+    check_download(data, fname=filename)
+
+
 def test_specify_port(run_servefile, datadir):
     data = "NOOT NOOT"
     p = datadir({'testfile': data}) / 'testfile'
-    run_servefile([str(p), '-p', '8081'])
+    run_servefile([str(p), '-p', str(SERVEFILE_SECONDARY_PORT)])
 
-    check_download(data, fname='testfile', port=8081)
+    _retry_while(ConnectionError, check_download)(data, fname='testfile', port=SERVEFILE_SECONDARY_PORT)
 
 
 def test_ipv4_only(run_servefile, datadir):
@@ -155,11 +214,11 @@ def test_ipv4_only(run_servefile, datadir):
     p = datadir({'testfile': data}) / 'testfile'
     run_servefile([str(p), '-4'])
 
-    check_download(data, fname='testfile', host='127.0.0.1')
+    _retry_while(ConnectionError, check_download)(data, fname='testfile', host='127.0.0.1')
 
     sock = socket.socket(socket.AF_INET6)
     with pytest.raises(connrefused_exc):
-        sock.connect(("::1", 8080))
+        sock.connect(("::1", SERVEFILE_DEFAULT_PORT))
 
 
 def test_big_download(run_servefile, datadir):
@@ -168,7 +227,7 @@ def test_big_download(run_servefile, datadir):
     p = datadir({'testfile': data}) / 'testfile'
     run_servefile(str(p))
 
-    check_download(data, fname='testfile')
+    _retry_while(ConnectionError, check_download)(data, fname='testfile')
 
 
 def test_authentication(run_servefile, datadir):
@@ -177,11 +236,11 @@ def test_authentication(run_servefile, datadir):
 
     run_servefile([str(p), '-a', 'user:password'])
     for auth in [('foo', 'bar'), ('user', 'wrong'), ('unknown', 'password')]:
-        r = make_request(auth=auth)
+        r = _retry_while(ConnectionError, make_request)(auth=auth)
         assert '401 - Unauthorized' in r.text
         assert r.status_code == 401
 
-    check_download(data, fname='testfile', auth=('user', 'password'))
+    _retry_while(ConnectionError, check_download)(data, fname='testfile', auth=('user', 'password'))
 
 
 def test_serve_directory(run_servefile, datadir):
@@ -190,6 +249,7 @@ def test_serve_directory(run_servefile, datadir):
         'bar': {'thisisaverylongfilenamefortestingthatthisstillworksproperly': 'jup!'},
         'noot': 'still data in here',
         'bigfile': 'x' * (10 * 1024 ** 2),
+        'möwe': 'KRAKRAKRAKA',
     }
     p = datadir(d)
     run_servefile([str(p), '-l'])
@@ -197,12 +257,12 @@ def test_serve_directory(run_servefile, datadir):
     # check if all files are in directory listing
     # (could be made more sophisticated with beautifulsoup)
     for path in '/', '/../':
-        r = make_request(path)
+        r = _retry_while(ConnectionError, make_request)(path)
         for k in d:
-            assert k in r.text
+            assert quote(k) in r.text
 
     for fname, content in d['foo'].items():
-        check_download(content, '/foo/' + fname)
+        _retry_while(ConnectionError, check_download)(content, '/foo/' + fname)
 
     r = make_request('/unknown')
     assert r.status_code == 404
@@ -224,7 +284,7 @@ def test_serve_relative_directory(run_servefile, datadir):
     # check if all files are in directory listing
     # (could be made more sophisticated with beautifulsoup)
     for path in '/', '/../':
-        r = make_request(path)
+        r = _retry_while(ConnectionError, make_request)(path)
         for k in d:
             assert k in r.text
 
@@ -248,14 +308,14 @@ def test_upload(run_servefile, tmp_path):
 
     run_servefile(['-u', str(uploaddir)])
 
-    # check that servefile created the directory
-    assert uploaddir.is_dir()
-
     # check upload form present
-    r = make_request()
+    r = _retry_while(ConnectionError, make_request)()
     assert r.status_code == 200
     assert 'multipart/form-data' in r.text
 
+    # check that servefile created the directory
+    assert uploaddir.is_dir()
+
     # upload file
     files = {'file': ('haiku.txt', data)}
     r = make_request(method='post', files=files)
@@ -271,6 +331,13 @@ def test_upload(run_servefile, tmp_path):
     with open(str(uploaddir / 'haiku.txt(1)')) as f:
         assert f.read() == data
 
+    # upload file using PUT
+    r = make_request("/haiku.txt", method='put', data=data)
+    assert r.status_code == 201
+    assert 'OK!' in r.text
+    with open(str(uploaddir / 'haiku.txt(2)')) as f:
+        assert f.read() == data
+
 
 def test_upload_size_limit(run_servefile, tmp_path):
     uploaddir = tmp_path / 'upload'
@@ -278,7 +345,7 @@ def test_upload_size_limit(run_servefile, tmp_path):
 
     # upload file that is too big
     files = {'file': ('toobig', "x" * 2049)}
-    r = make_request(method='post', files=files)
+    r = _retry_while(ConnectionError, make_request)(method='post', files=files)
     assert 'Your file was too big' in r.text
     assert r.status_code == 413
     assert not (uploaddir / 'toobig').exists()
@@ -290,6 +357,20 @@ def test_upload_size_limit(run_servefile, tmp_path):
     assert r.status_code == 200
 
 
+def test_upload_large_file(run_servefile, tmp_path):
+    # small files end up in BytesIO while large files get temporary files. this
+    # test makes sure we hit the large file codepath at least once
+    uploaddir = tmp_path / 'upload'
+    run_servefile(['-u', str(uploaddir)])
+
+    data = "asdf" * 1024
+    files = {'file': ('more_data.txt', data)}
+    r = _retry_while(ConnectionError, make_request)(method='post', files=files)
+    assert r.status_code == 200
+    with open(str(uploaddir / 'more_data.txt')) as f:
+        assert f.read() == data
+
+
 def test_tar_mode(run_servefile, datadir):
     d = {
         'foo': {
@@ -303,7 +384,7 @@ def test_tar_mode(run_servefile, datadir):
     # test redirect?
 
     # test contents of tar file
-    r = make_request()
+    r = _retry_while(ConnectionError, make_request)()
     assert r.status_code == 200
     tar = tarfile.open(fileobj=io.BytesIO(r.content))
     assert len(tar.getmembers()) == 3
@@ -319,7 +400,7 @@ def test_tar_compression(run_servefile, datadir):
     p = datadir(d)
     run_servefile(['-c', 'gzip', '-t', str(p / 'foo')])
 
-    r = make_request()
+    r = _retry_while(ConnectionError, make_request)()
     assert r.status_code == 200
     tar = tarfile.open(fileobj=io.BytesIO(r.content), mode='r:gz')
     assert len(tar.getmembers()) == 1
@@ -329,7 +410,6 @@ def test_https(run_servefile, datadir):
     data = "NOOT NOOT"
     p = datadir({'testfile': data}) / 'testfile'
     run_servefile(['--ssl', str(p)])
-    time.sleep(0.2)  # time for generating ssl certificates
 
     # fingerprint = None
     # while not fingerprint:
@@ -344,7 +424,7 @@ def test_https(run_servefile, datadir):
 
     # assert fingerprint
     urllib3.disable_warnings()
-    check_download(data, protocol='https', verify=False)
+    _retry_while(ConnectionError, check_download)(data, protocol='https', verify=False)
 
 
 def test_https_big_download(run_servefile, datadir):
@@ -352,7 +432,27 @@ def test_https_big_download(run_servefile, datadir):
     data = "x" * (10 * 1024 ** 2)
     p = datadir({'testfile': data}) / 'testfile'
     run_servefile(['--ssl', str(p)])
-    time.sleep(0.2)  # time for generating ssl certificates
 
     urllib3.disable_warnings()
-    check_download(data, protocol='https', verify=False)
+    _retry_while(ConnectionError, check_download)(data, protocol='https', verify=False)
+
+
+def test_abort_download(run_servefile, datadir):
+    data = "x" * (10 * 1024 ** 2)
+    p = datadir({'testfile': data}) / 'testfile'
+    env = os.environ.copy()
+    env['PYTHONUNBUFFERED'] = '1'
+    proc = run_servefile(str(p), stdout=subprocess.PIPE, stderr=subprocess.STDOUT, env=env)
+
+    # provoke a connection abort
+    # hopefully the buffers will not fill up with all of the 10mb
+    sock = socket.socket(socket.AF_INET)
+    _retry_while(connrefused_exc, sock.connect)(("localhost", SERVEFILE_DEFAULT_PORT))
+    sock.send(b"GET /testfile HTTP/1.0\n\n")
+    resp = sock.recv(100)
+    assert resp != b''
+    sock.close()
+    time.sleep(0.1)
+    proc.kill()
+    out = proc.stdout.read().decode()
+    assert "127.0.0.1 ABORTED transmission" in out

tox.ini

@@ -1,9 +1,19 @@
 [tox]
-envlist = py27,py36,py37,py38
+envlist = py27,py37,py38,py39,py310,py311,pep8
 
 [testenv]
 deps =
         pathlib2; python_version<"3"
         pytest
         requests
-commands = pytest --tb=short {posargs}
+        flake8
+commands = pytest -v --tb=short {posargs}
+
+[testenv:pep8]
+commands = flake8 servefile/ {posargs}
+
+[flake8]
+show-source = True
+max-line-length = 120
+ignore = E123,E125,E241,E402,E741,W503,W504,H301
+exclude=.venv,.git,.tox,dist,doc,*lib/python*,*egg,build