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posix: always seek to EOF when opening a file in append mode...
posix: always seek to EOF when opening a file in append mode Python 3 already does this, so skip it there. Consider the program: #include <stdio.h> int main() { FILE *f = fopen("narf", "w"); fprintf(f, "narf\n"); fclose(f); f = fopen("narf", "a"); printf("%ld\n", ftell(f)); fprintf(f, "troz\n"); printf("%ld\n", ftell(f)); return 0; } on macOS, FreeBSD, and Linux with glibc, this program prints 5 10 but on musl libc (Alpine Linux and probably others) this prints 0 10 By my reading of https://pubs.opengroup.org/onlinepubs/009695399/functions/fopen.html this is technically correct, specifically: > Opening a file with append mode (a as the first character in the > mode argument) shall cause all subsequent writes to the file to be > forced to the then current end-of-file, regardless of intervening > calls to fseek(). in other words, the file position doesn't really matter in append-mode files, and we can't depend on it being at all meaningful unless we perform a seek() before tell() after open(..., 'a'). Experimentally after a .write() we can do a .tell() and it'll always be reasonable, but I'm unclear from reading the specification if that's a smart thing to rely on. This matches what we do on Windows and what Python 3 does for free, so let's just be consistent. Thanks to Yuya for the idea.

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r38612:e46c3b6a default
r42778:97ada9b8 5.0.2 stable
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dumbhttp.py
77 lines | 2.6 KiB | text/x-python | PythonLexer
Mike Hommey
tests: pull common http server setup out of individual tests...
r22959 #!/usr/bin/env python
Gregory Szorc
tests/dumbhttp: use absolute_import
r27282 from __future__ import absolute_import
Mike Hommey
tests: pull common http server setup out of individual tests...
r22959 """
Small and dumb HTTP server for use in tests.
"""
Gregory Szorc
tests/dumbhttp: use absolute_import
r27282 import optparse
Jun Wu
dumbhttp: use IPv6 if HGIPV6 is set to 1...
r31004 import os
Gregory Szorc
tests/dumbhttp: use absolute_import
r27282 import signal
Jun Wu
dumbhttp: use IPv6 if HGIPV6 is set to 1...
r31004 import socket
Gregory Szorc
tests/dumbhttp: use absolute_import
r27282 import sys
Mike Hommey
tests: pull common http server setup out of individual tests...
r22959
Gregory Szorc
tests/dumbhttp: use absolute_import
r27282 from mercurial import (
Yuya Nishihara
py3: fix dumbhttp.py to convert --daemon-postexec arguments back to bytes
r38612 encoding,
Pulkit Goyal
py3: make values bytes before passing into server.runservice()...
r37690 pycompat,
Yuya Nishihara
server: move cmdutil.service() to new module (API)...
r30506 server,
Pulkit Goyal
py3: conditionalize BaseHTTPServer, SimpleHTTPServer and CGIHTTPServer import...
r29566 util,
Gregory Szorc
tests/dumbhttp: use absolute_import
r27282 )
Pulkit Goyal
py3: conditionalize BaseHTTPServer, SimpleHTTPServer and CGIHTTPServer import...
r29566 httpserver = util.httpserver
Gregory Szorc
tests/dumbhttp: use absolute_import
r27282 OptionParser = optparse.OptionParser
Mike Hommey
tests: pull common http server setup out of individual tests...
r22959
Jun Wu
dumbhttp: use IPv6 if HGIPV6 is set to 1...
r31004 if os.environ.get('HGIPV6', '0') == '1':
class simplehttpserver(httpserver.httpserver):
address_family = socket.AF_INET6
else:
simplehttpserver = httpserver.httpserver
Yuya Nishihara
test-static-http: flush access log per request...
r34945 class _httprequesthandler(httpserver.simplehttprequesthandler):
def log_message(self, format, *args):
httpserver.simplehttprequesthandler.log_message(self, format, *args)
sys.stderr.flush()
Yuya Nishihara
tests: have dumbhttp.py use cmdutil.service() to wait for child to listen()...
r23136 class simplehttpservice(object):
def __init__(self, host, port):
self.address = (host, port)
def init(self):
Yuya Nishihara
test-static-http: flush access log per request...
r34945 self.httpd = simplehttpserver(self.address, _httprequesthandler)
Yuya Nishihara
tests: have dumbhttp.py use cmdutil.service() to wait for child to listen()...
r23136 def run(self):
self.httpd.serve_forever()
Mike Hommey
tests: pull common http server setup out of individual tests...
r22959
if __name__ == '__main__':
parser = OptionParser()
parser.add_option('-p', '--port', dest='port', type='int', default=8000,
help='TCP port to listen on', metavar='PORT')
parser.add_option('-H', '--host', dest='host', default='localhost',
help='hostname or IP to listen on', metavar='HOST')
Yuya Nishihara
test-static-http: show all files accessed over HTTP...
r34926 parser.add_option('--logfile', help='file name of access/error log')
Mike Hommey
tests: pull common http server setup out of individual tests...
r22959 parser.add_option('--pid', dest='pid',
help='file name where the PID of the server is stored')
parser.add_option('-f', '--foreground', dest='foreground',
action='store_true',
help='do not start the HTTP server in the background')
Jun Wu
serve: accept multiple values for --daemon-postexec...
r28451 parser.add_option('--daemon-postexec', action='append')
Mike Hommey
tests: pull common http server setup out of individual tests...
r22959
(options, args) = parser.parse_args()
signal.signal(signal.SIGTERM, lambda x, y: sys.exit(0))
Yuya Nishihara
test-static-http: show all files accessed over HTTP...
r34926 if options.foreground and options.logfile:
parser.error("options --logfile and --foreground are mutually "
"exclusive")
Mike Hommey
tests: pull common http server setup out of individual tests...
r22959 if options.foreground and options.pid:
parser.error("options --pid and --foreground are mutually exclusive")
Pulkit Goyal
py3: make values bytes before passing into server.runservice()...
r37690 opts = {b'pid_file': options.pid,
b'daemon': not options.foreground,
Yuya Nishihara
py3: fix dumbhttp.py to convert --daemon-postexec arguments back to bytes
r38612 b'daemon_postexec': pycompat.rapply(encoding.strtolocal,
options.daemon_postexec)}
Yuya Nishihara
tests: have dumbhttp.py use cmdutil.service() to wait for child to listen()...
r23136 service = simplehttpservice(options.host, options.port)
Pulkit Goyal
py3: make values bytes before passing into server.runservice()...
r37690 runargs = [sys.executable, __file__] + sys.argv[1:]
runargs = [pycompat.fsencode(a) for a in runargs]
Yuya Nishihara
server: move cmdutil.service() to new module (API)...
r30506 server.runservice(opts, initfn=service.init, runfn=service.run,
Yuya Nishihara
test-static-http: show all files accessed over HTTP...
r34926 logfile=options.logfile,
Pulkit Goyal
py3: make values bytes before passing into server.runservice()...
r37690 runargs=runargs)