198 lines
8.2 KiB
Python
198 lines
8.2 KiB
Python
|
"""Fix changes imports of urllib which are now incompatible.
|
||
|
|
This is rather similar to fix_imports, but because of the more
|
||
|
|
complex nature of the fixing for urllib, it has its own fixer.
|
||
|
|
"""
|
||
|
|
# Author: Nick Edds
|
||
|
|
|
||
|
|
# Local imports
|
||
|
|
from lib2to3.fixes.fix_imports import alternates, FixImports
|
||
|
|
from lib2to3 import fixer_base
|
||
|
|
from lib2to3.fixer_util import (Name, Comma, FromImport, Newline,
|
||
|
|
find_indentation, Node, syms)
|
||
|
|
|
||
|
|
MAPPING = {"urllib": [
|
||
|
|
("urllib.request",
|
||
|
|
["URLopener", "FancyURLopener", "urlretrieve",
|
||
|
|
"_urlopener", "urlopen", "urlcleanup",
|
||
|
|
"pathname2url", "url2pathname"]),
|
||
|
|
("urllib.parse",
|
||
|
|
["quote", "quote_plus", "unquote", "unquote_plus",
|
||
|
|
"urlencode", "splitattr", "splithost", "splitnport",
|
||
|
|
"splitpasswd", "splitport", "splitquery", "splittag",
|
||
|
|
"splittype", "splituser", "splitvalue", ]),
|
||
|
|
("urllib.error",
|
||
|
|
["ContentTooShortError"])],
|
||
|
|
"urllib2" : [
|
||
|
|
("urllib.request",
|
||
|
|
["urlopen", "install_opener", "build_opener",
|
||
|
|
"Request", "OpenerDirector", "BaseHandler",
|
||
|
|
"HTTPDefaultErrorHandler", "HTTPRedirectHandler",
|
||
|
|
"HTTPCookieProcessor", "ProxyHandler",
|
||
|
|
"HTTPPasswordMgr",
|
||
|
|
"HTTPPasswordMgrWithDefaultRealm",
|
||
|
|
"AbstractBasicAuthHandler",
|
||
|
|
"HTTPBasicAuthHandler", "ProxyBasicAuthHandler",
|
||
|
|
"AbstractDigestAuthHandler",
|
||
|
|
"HTTPDigestAuthHandler", "ProxyDigestAuthHandler",
|
||
|
|
"HTTPHandler", "HTTPSHandler", "FileHandler",
|
||
|
|
"FTPHandler", "CacheFTPHandler",
|
||
|
|
"UnknownHandler"]),
|
||
|
|
("urllib.error",
|
||
|
|
["URLError", "HTTPError"]),
|
||
|
|
]
|
||
|
|
}
|
||
|
|
|
||
|
|
# Duplicate the url parsing functions for urllib2.
|
||
|
|
MAPPING["urllib2"].append(MAPPING["urllib"][1])
|
||
|
|
|
||
|
|
|
||
|
|
def build_pattern():
|
||
|
|
bare = set()
|
||
|
|
for old_module, changes in MAPPING.items():
|
||
|
|
for change in changes:
|
||
|
|
new_module, members = change
|
||
|
|
members = alternates(members)
|
||
|
|
yield """import_name< 'import' (module=%r
|
||
|
|
| dotted_as_names< any* module=%r any* >) >
|
||
|
|
""" % (old_module, old_module)
|
||
|
|
yield """import_from< 'from' mod_member=%r 'import'
|
||
|
|
( member=%s | import_as_name< member=%s 'as' any > |
|
||
|
|
import_as_names< members=any* >) >
|
||
|
|
""" % (old_module, members, members)
|
||
|
|
yield """import_from< 'from' module_star=%r 'import' star='*' >
|
||
|
|
""" % old_module
|
||
|
|
yield """import_name< 'import'
|
||
|
|
dotted_as_name< module_as=%r 'as' any > >
|
||
|
|
""" % old_module
|
||
|
|
# bare_with_attr has a special significance for FixImports.match().
|
||
|
|
yield """power< bare_with_attr=%r trailer< '.' member=%s > any* >
|
||
|
|
""" % (old_module, members)
|
||
|
|
|
||
|
|
|
||
|
|
class FixUrllib(FixImports):
|
||
|
|
|
||
|
|
def build_pattern(self):
|
||
|
|
return "|".join(build_pattern())
|
||
|
|
|
||
|
|
def transform_import(self, node, results):
|
||
|
|
"""Transform for the basic import case. Replaces the old
|
||
|
|
import name with a comma separated list of its
|
||
|
|
replacements.
|
||
|
|
"""
|
||
|
|
import_mod = results.get("module")
|
||
|
|
pref = import_mod.prefix
|
||
|
|
|
||
|
|
names = []
|
||
|
|
|
||
|
|
# create a Node list of the replacement modules
|
||
|
|
for name in MAPPING[import_mod.value][:-1]:
|
||
|
|
names.extend([Name(name[0], prefix=pref), Comma()])
|
||
|
|
names.append(Name(MAPPING[import_mod.value][-1][0], prefix=pref))
|
||
|
|
import_mod.replace(names)
|
||
|
|
|
||
|
|
def transform_member(self, node, results):
|
||
|
|
"""Transform for imports of specific module elements. Replaces
|
||
|
|
the module to be imported from with the appropriate new
|
||
|
|
module.
|
||
|
|
"""
|
||
|
|
mod_member = results.get("mod_member")
|
||
|
|
pref = mod_member.prefix
|
||
|
|
member = results.get("member")
|
||
|
|
|
||
|
|
# Simple case with only a single member being imported
|
||
|
|
if member:
|
||
|
|
# this may be a list of length one, or just a node
|
||
|
|
if isinstance(member, list):
|
||
|
|
member = member[0]
|
||
|
|
new_name = None
|
||
|
|
for change in MAPPING[mod_member.value]:
|
||
|
|
if member.value in change[1]:
|
||
|
|
new_name = change[0]
|
||
|
|
break
|
||
|
|
if new_name:
|
||
|
|
mod_member.replace(Name(new_name, prefix=pref))
|
||
|
|
else:
|
||
|
|
self.cannot_convert(node, "This is an invalid module element")
|
||
|
|
|
||
|
|
# Multiple members being imported
|
||
|
|
else:
|
||
|
|
# a dictionary for replacements, order matters
|
||
|
|
modules = []
|
||
|
|
mod_dict = {}
|
||
|
|
members = results["members"]
|
||
|
|
for member in members:
|
||
|
|
# we only care about the actual members
|
||
|
|
if member.type == syms.import_as_name:
|
||
|
|
as_name = member.children[2].value
|
||
|
|
member_name = member.children[0].value
|
||
|
|
else:
|
||
|
|
member_name = member.value
|
||
|
|
as_name = None
|
||
|
|
if member_name != ",":
|
||
|
|
for change in MAPPING[mod_member.value]:
|
||
|
|
if member_name in change[1]:
|
||
|
|
if change[0] not in mod_dict:
|
||
|
|
modules.append(change[0])
|
||
|
|
mod_dict.setdefault(change[0], []).append(member)
|
||
|
|
|
||
|
|
new_nodes = []
|
||
|
|
indentation = find_indentation(node)
|
||
|
|
first = True
|
||
|
|
def handle_name(name, prefix):
|
||
|
|
if name.type == syms.import_as_name:
|
||
|
|
kids = [Name(name.children[0].value, prefix=prefix),
|
||
|
|
name.children[1].clone(),
|
||
|
|
name.children[2].clone()]
|
||
|
|
return [Node(syms.import_as_name, kids)]
|
||
|
|
return [Name(name.value, prefix=prefix)]
|
||
|
|
for module in modules:
|
||
|
|
elts = mod_dict[module]
|
||
|
|
names = []
|
||
|
|
for elt in elts[:-1]:
|
||
|
|
names.extend(handle_name(elt, pref))
|
||
|
|
names.append(Comma())
|
||
|
|
names.extend(handle_name(elts[-1], pref))
|
||
|
|
new = FromImport(module, names)
|
||
|
|
if not first or node.parent.prefix.endswith(indentation):
|
||
|
|
new.prefix = indentation
|
||
|
|
new_nodes.append(new)
|
||
|
|
first = False
|
||
|
|
if new_nodes:
|
||
|
|
nodes = []
|
||
|
|
for new_node in new_nodes[:-1]:
|
||
|
|
nodes.extend([new_node, Newline()])
|
||
|
|
nodes.append(new_nodes[-1])
|
||
|
|
node.replace(nodes)
|
||
|
|
else:
|
||
|
|
self.cannot_convert(node, "All module elements are invalid")
|
||
|
|
|
||
|
|
def transform_dot(self, node, results):
|
||
|
|
"""Transform for calls to module members in code."""
|
||
|
|
module_dot = results.get("bare_with_attr")
|
||
|
|
member = results.get("member")
|
||
|
|
new_name = None
|
||
|
|
if isinstance(member, list):
|
||
|
|
member = member[0]
|
||
|
|
for change in MAPPING[module_dot.value]:
|
||
|
|
if member.value in change[1]:
|
||
|
|
new_name = change[0]
|
||
|
|
break
|
||
|
|
if new_name:
|
||
|
|
module_dot.replace(Name(new_name,
|
||
|
|
prefix=module_dot.prefix))
|
||
|
|
else:
|
||
|
|
self.cannot_convert(node, "This is an invalid module element")
|
||
|
|
|
||
|
|
def transform(self, node, results):
|
||
|
|
if results.get("module"):
|
||
|
|
self.transform_import(node, results)
|
||
|
|
elif results.get("mod_member"):
|
||
|
|
self.transform_member(node, results)
|
||
|
|
elif results.get("bare_with_attr"):
|
||
|
|
self.transform_dot(node, results)
|
||
|
|
# Renaming and star imports are not supported for these modules.
|
||
|
|
elif results.get("module_star"):
|
||
|
|
self.cannot_convert(node, "Cannot handle star imports.")
|
||
|
|
elif results.get("module_as"):
|
||
|
|
self.cannot_convert(node, "This module is now multiple modules")
|