Mercurial > hg
view tests/get-with-headers.py @ 27430:e240e914d226 stable
revlog: seek to end of file before writing (issue4943)
Revlogs were recently refactored to open file handles in "a+" and use a
persistent file handle for reading and writing. This drastically
reduced the number of file handles being opened.
Unfortunately, it appears that some versions of Solaris lose the file
offset when performing a write after the handle has been seeked.
The simplest workaround is to seek to EOF on files opened in a+ mode
before writing to them, which is what this patch does.
Ideally, this code would exist in the vfs layer. However, this would
require creating a proxy class for file objects in order to provide a
custom implementation of write(). This would add overhead. Since
revlogs are the only files we open in a+ mode, the one-off workaround
in revlog.py should be sufficient.
This patch appears to have little to no impact on performance on my
Linux machine.
author | Gregory Szorc <gregory.szorc@gmail.com> |
---|---|
date | Thu, 17 Dec 2015 17:16:02 -0800 |
parents | 5a6820f8da4d |
children | 8e86679d8acd |
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#!/usr/bin/env python """This does HTTP GET requests given a host:port and path and returns a subset of the headers plus the body of the result.""" import httplib, sys try: import json except ImportError: try: import simplejson as json except ImportError: json = None try: import msvcrt, os msvcrt.setmode(sys.stdout.fileno(), os.O_BINARY) msvcrt.setmode(sys.stderr.fileno(), os.O_BINARY) except ImportError: pass twice = False if '--twice' in sys.argv: sys.argv.remove('--twice') twice = True headeronly = False if '--headeronly' in sys.argv: sys.argv.remove('--headeronly') headeronly = True formatjson = False if '--json' in sys.argv: sys.argv.remove('--json') formatjson = True tag = None def request(host, path, show): assert not path.startswith('/'), path global tag headers = {} if tag: headers['If-None-Match'] = tag conn = httplib.HTTPConnection(host) conn.request("GET", '/' + path, None, headers) response = conn.getresponse() print response.status, response.reason if show[:1] == ['-']: show = sorted(h for h, v in response.getheaders() if h.lower() not in show) for h in [h.lower() for h in show]: if response.getheader(h, None) is not None: print "%s: %s" % (h, response.getheader(h)) if not headeronly: print data = response.read() # Pretty print JSON. This also has the beneficial side-effect # of verifying emitted JSON is well-formed. if formatjson: if not json: print 'no json module not available' print 'did you forget a #require json?' sys.exit(1) # json.dumps() will print trailing newlines. Eliminate them # to make tests easier to write. data = json.loads(data) lines = json.dumps(data, sort_keys=True, indent=2).splitlines() for line in lines: print line.rstrip() else: sys.stdout.write(data) if twice and response.getheader('ETag', None): tag = response.getheader('ETag') return response.status status = request(sys.argv[1], sys.argv[2], sys.argv[3:]) if twice: status = request(sys.argv[1], sys.argv[2], sys.argv[3:]) if 200 <= status <= 305: sys.exit(0) sys.exit(1)