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googler-tmp
#!/usr/bin/env python3
#
# https://raw.githubusercontent.com/jarun/googler/7e725573f801c587df7688a07f9fc7a9408d76eb/googler
#
# Copyright © 2008 Henri Hakkinen
# Copyright © 2015-2019 Arun Prakash Jana <[email protected]>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import argparse
import atexit
import base64
import collections
import codecs
import functools
import gzip
import html.entities
import html.parser
import http.client
from http.client import HTTPSConnection
import locale
import logging
import os
import platform
import shutil
import signal
import socket
import ssl
from subprocess import Popen, PIPE, DEVNULL
import sys
import textwrap
import unicodedata
import urllib.parse
import uuid
import webbrowser
# Python optional dependency compatibility layer
try:
import readline
except ImportError:
pass
try:
import setproctitle
setproctitle.setproctitle('googler')
except (ImportError, Exception):
pass
# Basic setup
logging.basicConfig(format='[%(levelname)s] %(message)s')
logger = logging.getLogger()
def sigint_handler(signum, frame):
print('\nInterrupted.', file=sys.stderr)
sys.exit(1)
try:
signal.signal(signal.SIGINT, sigint_handler)
except ValueError:
# signal only works in main thread
pass
# Constants
_VERSION_ = '3.9'
COLORMAP = {k: '\x1b[%sm' % v for k, v in {
'a': '30', 'b': '31', 'c': '32', 'd': '33',
'e': '34', 'f': '35', 'g': '36', 'h': '37',
'i': '90', 'j': '91', 'k': '92', 'l': '93',
'm': '94', 'n': '95', 'o': '96', 'p': '97',
'A': '30;1', 'B': '31;1', 'C': '32;1', 'D': '33;1',
'E': '34;1', 'F': '35;1', 'G': '36;1', 'H': '37;1',
'I': '90;1', 'J': '91;1', 'K': '92;1', 'L': '93;1',
'M': '94;1', 'N': '95;1', 'O': '96;1', 'P': '97;1',
'x': '0', 'X': '1', 'y': '7', 'Y': '7;1',
}.items()}
USER_AGENT = 'googler/%s (like MSIE)' % _VERSION_
text_browsers = ['elinks', 'links', 'lynx', 'w3m', 'www-browser']
# Self-upgrade parameters
#
# Downstream packagers are recommended to turn off the entire self-upgrade
# mechanism through
#
# make disable-self-upgrade
#
# before running `make install'.
ENABLE_SELF_UPGRADE_MECHANISM = True
API_REPO_BASE = 'https://api.github.com/repos/jarun/googler'
RAW_DOWNLOAD_REPO_BASE = 'https://raw.githubusercontent.com/jarun/googler'
debugger = False
# Monkeypatch textwrap for CJK wide characters.
def monkeypatch_textwrap_for_cjk():
try:
if textwrap.wrap.patched:
return
except AttributeError:
pass
psl_textwrap_wrap = textwrap.wrap
def textwrap_wrap(text, width=70, **kwargs):
if width <= 2:
width = 2
# We first add a U+0000 after each East Asian Fullwidth or East
# Asian Wide character, then fill to width - 1 (so that if a NUL
# character ends up on a new line, we still have one last column
# to spare for the preceding wide character). Finally we strip
# all the NUL characters.
#
# East Asian Width: https://www.unicode.org/reports/tr11/
return [
line.replace('\0', '')
for line in psl_textwrap_wrap(
''.join(
ch + '\0' if unicodedata.east_asian_width(ch) in ('F', 'W') else ch
for ch in unicodedata.normalize('NFC', text)
),
width=width - 1,
**kwargs
)
]
def textwrap_fill(text, width=70, **kwargs):
return '\n'.join(textwrap_wrap(text, width=width, **kwargs))
textwrap.wrap = textwrap_wrap
textwrap.fill = textwrap_fill
textwrap.wrap.patched = True
textwrap.fill.patched = True
monkeypatch_textwrap_for_cjk()
### begin dim (DOM implementation with CSS support) ###
### https://github.com/zmwangx/dim/blob/master/dim.py ###
import html
import re
import textwrap
from collections import OrderedDict
from enum import Enum
from html.parser import HTMLParser
try:
from typing import (
Any,
Dict,
Generator,
Iterable,
Iterator,
List,
Match,
Optional,
Tuple,
Union,
cast,
)
except ImportError: # pragma: no cover
# Python 3.4 without external typing module
class _TypeStub:
def __getitem__(self, _): # type: ignore
return None
Any = None
Dict = Generator = Iterable = Iterator = List = Match = _TypeStub() # type: ignore
Optional = Tuple = Union = _TypeStub() # type: ignore
def cast(typ, val): # type: ignore
return val
SelectorGroupLike = Union[str, "SelectorGroup", "Selector"]
class Node(object):
"""
Represents a DOM node.
Parts of JavaScript's DOM ``Node`` API and ``Element`` API are
mirrored here, with extensions. In particular, ``querySelector`` and
``querySelectorAll`` are mirrored.
Notable properties and methods: :meth:`attr()`, :attr:`classes`,
:attr:`html`, :attr:`text`, :meth:`ancestors()`,
:meth:`descendants()`, :meth:`select()`, :meth:`select_all()`,
:meth:`matched_by()`,
Attributes:
tag (:class:`Optional`\\[:class:`str`])
attrs (:class:`Dict`\\[:class:`str`, :class:`str`])
parent (:class:`Optional`\\[:class:`Node`])
children (:class:`List`\\[:class:`Node`])
"""
# Meant to be reimplemented by subclasses.
def __init__(self) -> None:
self.tag = None # type: Optional[str]
self.attrs = {} # type: Dict[str, str]
self.parent = None # type: Optional[Node]
self.children = [] # type: List[Node]
# Used in DOMBuilder.
self._partial = False
# HTML representation of the node. Meant to be implemented by
# subclasses.
def __str__(self) -> str: # pragma: no cover
raise NotImplementedError
def select(self, selector: SelectorGroupLike) -> Optional["Node"]:
"""DOM ``querySelector`` clone. Returns one match (if any)."""
selector = self._normalize_selector(selector)
for node in self._select_all(selector):
return node
return None
def query_selector(self, selector: SelectorGroupLike) -> Optional["Node"]:
"""Alias of :meth:`select`."""
return self.select(selector)
def select_all(self, selector: SelectorGroupLike) -> List["Node"]:
"""DOM ``querySelectorAll`` clone. Returns all matches in a list."""
selector = self._normalize_selector(selector)
return list(self._select_all(selector))
def query_selector_all(self, selector: SelectorGroupLike) -> List["Node"]:
"""Alias of :meth:`select_all`."""
return self.select_all(selector)
def matched_by(
self, selector: SelectorGroupLike, root: Optional["Node"] = None
) -> bool:
"""
Checks whether this node is matched by `selector`.
See :meth:`SelectorGroup.matches()`.
"""
selector = self._normalize_selector(selector)
return selector.matches(self, root=root)
@staticmethod
def _normalize_selector(selector: SelectorGroupLike) -> "SelectorGroup":
if isinstance(selector, str):
return SelectorGroup.from_str(selector)
if isinstance(selector, SelectorGroup):
return selector
if isinstance(selector, Selector):
return SelectorGroup([selector])
raise ValueError("not a selector or group of selectors: %s" % repr(selector))
def _select_all(self, selector: "SelectorGroup") -> Generator["Node", None, None]:
for descendant in self.descendants():
if selector.matches(descendant, root=self):
yield descendant
def child_nodes(self) -> List["Node"]:
return self.children
def first_child(self) -> Optional["Node"]:
if self.children:
return self.children[0]
else:
return None
def first_element_child(self) -> Optional["Node"]:
for child in self.children:
if isinstance(child, ElementNode):
return child
return None
def last_child(self) -> Optional["Node"]:
if self.children:
return self.children[-1]
else:
return None
def last_element_child(self) -> Optional["Node"]:
for child in reversed(self.children):
if isinstance(child, ElementNode):
return child
return None
def next_sibling(self) -> Optional["Node"]:
""".. note:: Not O(1), use with caution."""
next_siblings = self.next_siblings()
if next_siblings:
return next_siblings[0]
else:
return None
def next_siblings(self) -> List["Node"]:
parent = self.parent
if not parent:
return []
try:
index = parent.children.index(self)
return parent.children[index + 1 :]
except ValueError: # pragma: no cover
raise ValueError("node is not found in children of its parent")
def next_element_sibling(self) -> Optional["ElementNode"]:
""".. note:: Not O(1), use with caution."""
for sibling in self.next_siblings():
if isinstance(sibling, ElementNode):
return sibling
return None
def previous_sibling(self) -> Optional["Node"]:
""".. note:: Not O(1), use with caution."""
previous_siblings = self.previous_siblings()
if previous_siblings:
return previous_siblings[0]
else:
return None
def previous_siblings(self) -> List["Node"]:
"""
Compared to the natural DOM order, the order of returned nodes
are reversed. That is, the adjacent sibling (if any) is the
first in the returned list.
"""
parent = self.parent
if not parent:
return []
try:
index = parent.children.index(self)
if index > 0:
return parent.children[index - 1 :: -1]
else:
return []
except ValueError: # pragma: no cover
raise ValueError("node is not found in children of its parent")
def previous_element_sibling(self) -> Optional["ElementNode"]:
""".. note:: Not O(1), use with caution."""
for sibling in self.previous_siblings():
if isinstance(sibling, ElementNode):
return sibling
return None
def ancestors(
self, *, root: Optional["Node"] = None
) -> Generator["Node", None, None]:
"""
Ancestors are generated in reverse order of depth, stopping at
`root`.
A :class:`RuntimeException` is raised if `root` is not in the
ancestral chain.
"""
if self is root:
return
ancestor = self.parent
while ancestor is not root:
if ancestor is None:
raise RuntimeError("provided root node not found in ancestral chain")
yield ancestor
ancestor = ancestor.parent
if root:
yield root
def descendants(self) -> Generator["Node", None, None]:
"""Descendants are generated in depth-first order."""
for child in self.children:
yield child
yield from child.descendants()
def attr(self, attr: str) -> Optional[str]:
"""Returns the attribute if it exists on the node, otherwise ``None``."""
return self.attrs.get(attr)
@property
def html(self) -> str:
"""
HTML representation of the node.
(For a :class:`TextNode`, :meth:`html` returns the escaped version of the
text.
"""
return str(self)
def outer_html(self) -> str:
"""Alias of :attr:`html`."""
return self.html
def inner_html(self) -> str:
"""HTML representation of the node's children."""
return "".join(child.html for child in self.children)
@property
def text(self) -> str: # pragma: no cover
"""This property is expected to be implemented by subclasses."""
raise NotImplementedError
def text_content(self) -> str:
"""Alias of :attr:`text`."""
return self.text
@property
def classes(self) -> List[str]:
return self.attrs.get("class", "").split()
def class_list(self) -> List[str]:
return self.classes
class ElementNode(Node):
"""
Represents an element node.
Note that tag and attribute names are case-insensitive; attribute
values are case-sensitive.
"""
def __init__(
self,
tag: str,
attrs: Iterable[Tuple[str, str]],
*,
parent: Optional["Node"] = None,
children: Optional[List["Node"]] = None
) -> None:
Node.__init__(self)
self.tag = tag.lower() # type: str
self.attrs = OrderedDict((attr.lower(), val) for attr, val in attrs)
self.parent = parent
self.children = children or []
def __repr__(self) -> str:
s = "<" + self.tag
if self.attrs:
s += " attrs=%s" % repr(list(self.attrs.items()))
if self.children:
s += " children=%s" % repr(self.children)
s += ">"
return s
# https://ipython.org/ipython-doc/3/api/generated/IPython.lib.pretty.html
def _repr_pretty_(self, p: Any, cycle: bool) -> None: # pragma: no cover
if cycle:
raise RuntimeError("cycle detected in DOM tree")
p.text("<\x1b[1m%s\x1b[0m" % self.tag)
if self.attrs:
p.text(" attrs=%s" % repr(list(self.attrs.items())))
if self.children:
p.text(" children=[")
if len(self.children) == 1 and isinstance(self.first_child(), TextNode):
p.text("\x1b[4m%s\x1b[0m" % repr(self.first_child()))
else:
with p.indent(2):
for child in self.children:
p.break_()
if hasattr(child, "_repr_pretty_"):
child._repr_pretty_(p, False) # type: ignore
else:
p.text("\x1b[4m%s\x1b[0m" % repr(child))
p.text(",")
p.break_()
p.text("]")
p.text(">")
def __str__(self) -> str:
"""HTML representation of the node."""
s = "<" + self.tag
for attr, val in self.attrs.items():
s += ' %s="%s"' % (attr, html.escape(val))
if self.children:
s += ">"
s += "".join(str(child) for child in self.children)
s += "</%s>" % self.tag
else:
if _tag_is_void(self.tag):
s += "/>"
else:
s += "></%s>" % self.tag
return s
@property
def text(self) -> str:
"""The concatenation of all descendant text nodes."""
return "".join(child.text for child in self.children)
class TextNode(str, Node):
"""
Represents a text node.
Subclasses :class:`Node` and :class:`str`.
"""
def __new__(cls, text: str) -> "TextNode":
s = str.__new__(cls, text) # type: ignore
s.parent = None
return s # type: ignore
def __init__(self, text: str) -> None:
Node.__init__(self)
def __repr__(self) -> str:
return "<%s>" % str.__repr__(self)
# HTML-escaped form of the text node. use text() for unescaped
# version.
def __str__(self) -> str:
return html.escape(self)
def __eq__(self, other: object) -> bool:
"""
Two text nodes are equal if and only if they are the same node.
For string comparision, use :attr:`text`.
"""
return self is other
def __ne__(self, other: object) -> bool:
"""
Two text nodes are non-equal if they are not the same node.
For string comparision, use :attr:`text`.
"""
return self is not other
@property
def text(self) -> str:
return str.__str__(self)
class DOMBuilderException(Exception):
"""
Exception raised when :class:`DOMBuilder` detects a bad state.
Attributes:
pos (:class:`Tuple`\\[:class:`int`, :class:`int`]):
Line number and offset in HTML input.
why (:class:`str`):
Reason of the exception.
"""
def __init__(self, pos: Tuple[int, int], why: str) -> None:
self.pos = pos
self.why = why
def __str__(self) -> str: # pragma: no cover
return "DOM builder aborted at %d:%d: %s" % (self.pos[0], self.pos[1], self.why)
class DOMBuilder(HTMLParser):
"""
HTML parser / DOM builder.
Subclasses :class:`html.parser.HTMLParser`.
Consume HTML and builds a :class:`Node` tree. Once finished, use
:attr:`root` to access the root of the tree.
This parser cannot parse malformed HTML with tag mismatch.
"""
def __init__(self) -> None:
super().__init__(convert_charrefs=True)
self._stack = [] # type: List[Node]
def handle_starttag(self, tag: str, attrs: List[Tuple[str, str]]) -> None:
node = ElementNode(tag, attrs)
node._partial = True
self._stack.append(node)
# For void elements, immediately invoke the end tag handler (see
# handle_startendtag()).
if _tag_is_void(tag):
self.handle_endtag(tag)
def handle_endtag(self, tag: str) -> None:
tag = tag.lower()
children = []
while self._stack and not self._stack[-1]._partial:
children.append(self._stack.pop())
if not self._stack:
raise DOMBuilderException(self.getpos(), "extra end tag: %s" % repr(tag))
parent = self._stack[-1]
if parent.tag != tag:
raise DOMBuilderException(
self.getpos(),
"expecting end tag %s, got %s" % (repr(parent.tag), repr(tag)),
)
parent.children = list(reversed(children))
parent._partial = False
for child in children:
child.parent = parent
# Make parser behavior for explicitly and implicitly void elements
# (e.g., <hr> vs <hr/>) consistent. The former triggers
# handle_starttag only, whereas the latter triggers
# handle_startendtag (which by default triggers both handle_starttag
# and handle_endtag). See https://www.bugs.python.org/issue25258.
def handle_startendtag(self, tag: str, attrs: List[Tuple[str, str]]) -> None:
self.handle_starttag(tag, attrs)
def handle_data(self, text: str) -> None:
if not self._stack:
# Ignore text nodes before the first tag.
return
self._stack.append(TextNode(text))
@property
def root(self) -> "Node":
"""
Finishes processing and returns the root node.
Raises :class:`DOMBuilderException` if there is no root tag or
root tag is not closed yet.
"""
if not self._stack:
raise DOMBuilderException(self.getpos(), "no root tag")
if self._stack[0]._partial:
raise DOMBuilderException(self.getpos(), "root tag not closed yet")
return self._stack[0]
def parse_html(html: str, *, ParserClass: type = DOMBuilder) -> "Node":
"""
Parses HTML string, builds DOM, and returns root node.
The parser may raise :class:`DOMBuilderException`.
Args:
html: input HTML string
ParserClass: :class:`DOMBuilder` or a subclass
Returns:
Root note of the parsed tree. If the HTML string contains
multiple top-level elements, only the first is returned and the
rest are lost.
"""
builder = ParserClass() # type: DOMBuilder
builder.feed(html)
builder.close()
return builder.root
class SelectorParserException(Exception):
"""
Exception raised when the selector parser fails to parse an input.
Attributes:
s (:class:`str`):
The input string to be parsed.
cursor (:class:`int`):
Cursor position where the failure occurred.
why (:class:`str`):
Reason of the failure.
"""
def __init__(self, s: str, cursor: int, why: str) -> None:
self.s = s
self.cursor = cursor
self.why = why
def __str__(self) -> str: # pragma: no cover
return "selector parser aborted at character %d of %s: %s" % (
self.cursor,
repr(self.s),
self.why,
)
class SelectorGroup:
"""
Represents a group of CSS selectors.
A group of CSS selectors is simply a comma-separated list of
selectors. [#]_ See :class:`Selector` documentation for the scope of
support.
Typically, a :class:`SelectorGroup` is constructed from a string
(e.g., ``th.center, td.center``) using the factory function
:meth:`from_str`.
.. [#] https://www.w3.org/TR/selectors-3/#grouping
"""
def __init__(self, selectors: Iterable["Selector"]) -> None:
self._selectors = list(selectors)
def __repr__(self) -> str:
return "<SelectorGroup %s>" % repr(str(self))
def __str__(self) -> str:
return ", ".join(str(selector) for selector in self._selectors)
def __len__(self) -> int:
return len(self._selectors)
def __getitem__(self, index: int) -> "Selector":
return self._selectors[index]
def __iter__(self) -> Iterator["Selector"]:
return iter(self._selectors)
@classmethod
def from_str(cls, s: str) -> "SelectorGroup":
"""
Parses input string into a group of selectors.
:class:`SelectorParserException` is raised on invalid input. See
:class:`Selector` documentation for the scope of support.
Args:
s: input string
Returns:
Parsed group of selectors.
"""
i = 0
selectors = []
while i < len(s):
selector, i = Selector.from_str(s, i)
selectors.append(selector)
if not selectors:
raise SelectorParserException(s, i, "selector group is empty")
return cls(selectors)
def matches(self, node: "Node", root: Optional["Node"] = None) -> bool:
"""
Decides whether the group of selectors matches `node`.
The group of selectors matches `node` as long as one of the
selectors matches `node`.
If `root` is provided and child and/or descendant combinators
are involved, parent/ancestor lookup terminates at `root`.
"""
return any(selector.matches(node, root=root) for selector in self)
class Selector:
"""
Represents a CSS selector.
Recall that a CSS selector is a chain of one or more *sequences of
simple selectors* separated by *combinators*. [#selectors-3]_ This
concept is represented as a cons list of sequences of simple
selectors (in right to left order). This class in fact holds a
single sequence, with an optional combinator and reference to the
previous sequence.
For instance, ``main#main p.important.definition >
a.term[id][href]`` would be parsed into (schematically) the
following structure::
">" tag='a' classes=('term') attrs=([id], [href]) ~>
" " tag='p' classes=('important', 'definition') ~>
tag='main' id='main'
Each line is held in a separate instance of :class:`Selector`,
linked together by the :attr:`previous` attribute.
Supported grammar (from selectors level 3 [#selectors-3]_):
- Type selectors;
- Universal selectors;
- Class selectors;
- ID selectors;
- Attribute selectors;
- Combinators.
Unsupported grammar:
- Pseudo-classes;
- Pseudo-elements;
- Namespace prefixes (``ns|``, ``*|``, ``|``) in any part of any
selector.
Rationale:
- Pseudo-classes have too many variants, a few of which even
complete with an admittedly not-so-complex minilanguage. These add
up to a lot of code.
- Pseudo-elements are useless outside rendering contexts, hence out of
scope.
- Namespace support is too niche to be worth the parsing headache.
*Using namespace prefixes may confuse the parser!*
Note that the parser only loosely follows the spec and priotizes
ease of parsing (which includes readability and *writability* of
regexes), so some invalid selectors may be accepted (in fact, false
positives abound, but accepting valid inputs is a much more
important goal than rejecting invalid inputs for this library), and
some valid selectors may be rejected (but as long as you stick to
the scope outlined above and common sense you should be fine; the
false negatives shouldn't be used by actual human beings anyway).
In particular, whitespace character is simplified to ``\\s`` (ASCII
mode) despite CSS spec not counting U+000B (VT) as whitespace,
identifiers are simplified to ``[\\w-]+`` (ASCII mode), and strings
(attribute selector values can be either identifiers or strings)
allow escaped quotes (i.e., ``\\'`` inside single-quoted strings and
``\\"`` inside double-quoted strings) but everything else is
interpreted literally. The exact specs for CSS identifiers and
strings can be found at [#]_.
Certain selectors and combinators may be implemented in the parser
but not implemented in matching and/or selection APIs.
.. [#selectors-3] https://www.w3.org/TR/selectors-3/
.. [#] https://www.w3.org/TR/CSS21/syndata.html
Attributes:
tag (:class:`Optional`\\[:class:`str`]):
Type selector.
classes (:class:`List`\\[:class:`str`]):
Class selectors.
id (:class:`Optional`\\[:class:`str`]):
ID selector.
attrs (:class:`List`\\[:class:`AttributeSelector`]):
Attribute selectors.
combinator (:class:`Optional`\\[:class:`Combinator`]):
Combinator with the previous sequence of simple selectors in
chain.
previous (:class:`Optional`\\[:class:`Selector`]):
Reference to the previous sequence of simple selectors in
chain.
"""
def __init__(
self,
*,
tag: Optional[str] = None,
classes: Optional[List[str]] = None,
id: Optional[str] = None,
attrs: Optional[List["AttributeSelector"]] = None,
combinator: Optional["Combinator"] = None,
previous: Optional["Selector"] = None
) -> None:
self.tag = tag.lower() if tag else None
self.classes = classes or []
self.id = id
self.attrs = attrs or []
self.combinator = combinator
self.previous = previous
def __repr__(self) -> str:
return "<Selector %s>" % repr(str(self))
def __str__(self) -> str:
sequences = []
delimiters = []
seq = self
while True:
sequences.append(seq._sequence_str_())
if seq.previous:
if seq.combinator == Combinator.DESCENDANT:
delimiters.append(" ")
elif seq.combinator == Combinator.CHILD:
delimiters.append(" > ")
elif seq.combinator == Combinator.NEXT_SIBLING:
delimiters.append(" + ")
elif seq.combinator == Combinator.SUBSEQUENT_SIBLING:
delimiters.append(" ~ ")
else: # pragma: no cover
raise RuntimeError(
"unimplemented combinator: %s" % repr(self.combinator)
)
seq = seq.previous
else:
delimiters.append("")
break
return "".join(
delimiter + sequence
for delimiter, sequence in zip(reversed(delimiters), reversed(sequences))
)
# Format a single sequence of simple selectors, without combinator.
def _sequence_str_(self) -> str:
s = ""
if self.tag:
s += self.tag
if self.classes:
s += "".join(".%s" % class_ for class_ in self.classes)
if self.id:
s += "#%s" % self.id
if self.attrs:
s += "".join(str(attr) for attr in self.attrs)
return s if s else "*"
@classmethod
def from_str(cls, s: str, cursor: int = 0) -> Tuple["Selector", int]:
"""
Parses input string into selector.
This factory function only parses out one selector (up to a
comma or EOS), so partial consumption is allowed --- an optional
`cursor` is taken as input (0 by default) and the moved cursor
(either after the comma or at EOS) is returned as part of the
output.
:class:`SelectorParserException` is raised on invalid input. See
:class:`Selector` documentation for the scope of support.
If you need to completely consume a string representing
(potentially) a group of selectors, use
:meth:`SelectorGroup.from_str()`.
Args:
s: input string
cursor: initial cursor position on `s`
Returns:
A tuple containing the parsed selector and the moved the
cursor (either after a comma-delimiter, or at EOS).
"""
# Simple selectors.
TYPE_SEL = re.compile(r"[\w-]+", re.A)
UNIVERSAL_SEL = re.compile(r"\*")
ATTR_SEL = re.compile(
r"""\[
\s*(?P<attr>[\w-]+)\s*
(
(?P<op>[~|^$*]?=)\s*
(
(?P<val_identifier>[\w-]+)|
(?P<val_string>
(?P<quote>['"])
(?P<val_string_inner>.*?)
(?<!\\)(?P=quote)
)
)\s*
)?
\]""",
re.A | re.X,
)
CLASS_SEL = re.compile(r"\.([\w-]+)", re.A)
ID_SEL = re.compile(r"#([\w-]+)", re.A)
PSEUDO_CLASS_SEL = re.compile(r":[\w-]+(\([^)]+\))?", re.A)
PSEUDO_ELEM_SEL = re.compile(r"::[\w-]+", re.A)
# Combinators
DESCENDANT_COM = re.compile(r"\s+")
CHILD_COM = re.compile(r"\s*>\s*")
NEXT_SIB_COM = re.compile(r"\s*\+\s*")
SUB_SIB_COM = re.compile(r"\s*~\s*")
# Misc
WHITESPACE = re.compile(r"\s*")
END_OF_SELECTOR = re.compile(r"\s*($|,)")
tag = None
classes = []
id = None
attrs = []
combinator = None
selector = None
previous_combinator = None
i = cursor
# Skip leading whitespace
m = WHITESPACE.match(s, i)
if m:
i = m.end()
while i < len(s):
# Parse one simple selector.
#
# PEP 572 (assignment expressions; the one that burned Guido
# so much that he resigned as BDFL) would have been nice; it
# would have saved us from all the regex match
# reassignments, and worse still, the casts, since mypy
# complains about getting Optional[Match[str]] instead of
# Match[str].
if TYPE_SEL.match(s, i):
if tag:
raise SelectorParserException(s, i, "multiple type selectors found")
m = cast(Match[str], TYPE_SEL.match(s, i))
tag = m.group()
elif UNIVERSAL_SEL.match(s, i):
m = cast(Match[str], UNIVERSAL_SEL.match(s, i))
elif ATTR_SEL.match(s, i):
m = cast(Match[str], ATTR_SEL.match(s, i))
attr = m.group("attr")
op = m.group("op")
val_identifier = m.group("val_identifier")
quote = m.group("quote")
val_string_inner = m.group("val_string_inner")
if val_identifier is not None:
val = val_identifier
elif val_string_inner is not None:
val = val_string_inner.replace("\\" + quote, quote)
else:
val = None
if op is None:
type = AttributeSelectorType.BARE
elif op == "=":
type = AttributeSelectorType.EQUAL
elif op == "~=":
type = AttributeSelectorType.TILDE
elif op == "|=":
type = AttributeSelectorType.PIPE
elif op == "^=":
type = AttributeSelectorType.CARET
elif op == "$=":
type = AttributeSelectorType.DOLLAR
elif op == "*=":
type = AttributeSelectorType.ASTERISK
else: # pragma: no cover
raise SelectorParserException(
s,
i,
"unrecognized operator %s in attribute selector" % repr(op),
)
attrs.append(AttributeSelector(attr, val, type))
elif CLASS_SEL.match(s, i):
m = cast(Match[str], CLASS_SEL.match(s, i))
classes.append(m.group(1))
elif ID_SEL.match(s, i):
if id:
raise SelectorParserException(s, i, "multiple id selectors found")
m = cast(Match[str], ID_SEL.match(s, i))
id = m.group(1)
elif PSEUDO_CLASS_SEL.match(s, i):
raise SelectorParserException(s, i, "pseudo-classes not supported")
elif PSEUDO_ELEM_SEL.match(s, i):
raise SelectorParserException(s, i, "pseudo-elements not supported")
else:
raise SelectorParserException(
s, i, "expecting simple selector, found none"
)
i = m.end()
# Try to parse a combinator, or end the selector.
if CHILD_COM.match(s, i):
m = cast(Match[str], CHILD_COM.match(s, i))
combinator = Combinator.CHILD
elif NEXT_SIB_COM.match(s, i):
m = cast(Match[str], NEXT_SIB_COM.match(s, i))
combinator = Combinator.NEXT_SIBLING
elif SUB_SIB_COM.match(s, i):
m = cast(Match[str], SUB_SIB_COM.match(s, i))
combinator = Combinator.SUBSEQUENT_SIBLING
elif END_OF_SELECTOR.match(s, i):
m = cast(Match[str], END_OF_SELECTOR.match(s, i))
combinator = None
# Need to parse descendant combinator at the very end
# because it could be a prefix to all previous cases.
elif DESCENDANT_COM.match(s, i):
m = cast(Match[str], DESCENDANT_COM.match(s, i))
combinator = Combinator.DESCENDANT
else:
continue
i = m.end()
if combinator and i == len(s):
raise SelectorParserException(s, i, "unexpected end at combinator")
selector = cls(
tag=tag,
classes=classes,
id=id,
attrs=attrs,
combinator=previous_combinator,
previous=selector,
)
previous_combinator = combinator
# End of selector.
if combinator is None:
break
tag = None
classes = []
id = None
attrs = []
combinator = None
if not selector:
raise SelectorParserException(s, i, "selector is empty")
return selector, i
def matches(self, node: "Node", root: Optional["Node"] = None) -> bool:
"""
Decides whether the selector matches `node`.
Each sequence of simple selectors in the selector's chain must
be matched for a positive.
If `root` is provided and child and/or descendant combinators
are involved, parent/ancestor lookup terminates at `root`.
"""
if self.tag:
if not node.tag or node.tag != self.tag:
return False
if self.id:
if node.attrs.get("id") != self.id:
return False
if self.classes:
classes = node.classes
for class_ in self.classes:
if class_ not in classes:
return False
if self.attrs:
for attr_selector in self.attrs:
if not attr_selector.matches(node):
return False
if not self.previous:
return True
if self.combinator == Combinator.DESCENDANT:
return any(
self.previous.matches(ancestor, root=root)
for ancestor in node.ancestors()
)
elif self.combinator == Combinator.CHILD:
if node is root or node.parent is None:
return False
else:
return self.previous.matches(node.parent)
elif self.combinator == Combinator.NEXT_SIBLING:
sibling = node.previous_element_sibling()
if not sibling:
return False
else:
return self.previous.matches(sibling)
elif self.combinator == Combinator.SUBSEQUENT_SIBLING:
return any(
self.previous.matches(sibling, root=root)
for sibling in node.previous_siblings()
if isinstance(sibling, ElementNode)
)
else: # pragma: no cover
raise RuntimeError("unimplemented combinator: %s" % repr(self.combinator))
class AttributeSelector:
"""
Represents an attribute selector.
Attributes:
attr (:class:`str`)
val (:class:`Optional`\\[:class:`str`])
type (:class:`AttributeSelectorType`)
"""
def __init__(
self, attr: str, val: Optional[str], type: "AttributeSelectorType"
) -> None:
self.attr = attr.lower()
self.val = val
self.type = type
def __repr__(self) -> str:
return "<AttributeSelector %s>" % repr(str(self))
def __str__(self) -> str:
if self.type == AttributeSelectorType.BARE:
fmt = "[{attr}{val:.0}]"
elif self.type == AttributeSelectorType.EQUAL:
fmt = "[{attr}={val}]"
elif self.type == AttributeSelectorType.TILDE:
fmt = "[{attr}~={val}]"
elif self.type == AttributeSelectorType.PIPE:
fmt = "[{attr}|={val}]"
elif self.type == AttributeSelectorType.CARET:
fmt = "[{attr}^={val}]"
elif self.type == AttributeSelectorType.DOLLAR:
fmt = "[{attr}$={val}]"
elif self.type == AttributeSelectorType.ASTERISK:
fmt = "[{attr}*={val}]"
return fmt.format(attr=self.attr, val=repr(self.val))
def matches(self, node: "Node") -> bool:
val = node.attrs.get(self.attr)
if val is None:
return False
if self.type == AttributeSelectorType.BARE:
return True
elif self.type == AttributeSelectorType.EQUAL:
return val == self.val
elif self.type == AttributeSelectorType.TILDE:
return self.val in val.split()
elif self.type == AttributeSelectorType.PIPE:
return val == self.val or val.startswith("%s-" % self.val)
elif self.type == AttributeSelectorType.CARET:
return bool(self.val and val.startswith(self.val))
elif self.type == AttributeSelectorType.DOLLAR:
return bool(self.val and val.endswith(self.val))
elif self.type == AttributeSelectorType.ASTERISK:
return bool(self.val and self.val in val)
else: # pragma: no cover
raise RuntimeError("unimplemented attribute selector: %s" % repr(self.type))
# Enum: basis for poor man's algebraic data type.
class AttributeSelectorType(Enum):
"""
Attribute selector types.
Members correspond to the following forms of attribute selector:
- :attr:`BARE`: ``[attr]``;
- :attr:`EQUAL`: ``[attr=val]``;
- :attr:`TILDE`: ``[attr~=val]``;
- :attr:`PIPE`: ``[attr|=val]``;
- :attr:`CARET`: ``[attr^=val]``;
- :attr:`DOLLAR`: ``[attr$=val]``;
- :attr:`ASTERISK`: ``[attr*=val]``.
"""
# [attr]
BARE = 1
# [attr=val]
EQUAL = 2
# [attr~=val]
TILDE = 3
# [attr|=val]
PIPE = 4
# [attr^=val]
CARET = 5
# [attr$=val]
DOLLAR = 6
# [attr*=val]
ASTERISK = 7
class Combinator(Enum):
"""
Combinator types.
Members correspond to the following combinators:
- :attr:`DESCENDANT`: ``A B``;
- :attr:`CHILD`: ``A > B``;
- :attr:`NEXT_SIBLING`: ``A + B``;
- :attr:`SUBSEQUENT_SIBLING`: ``A ~ B``.
"""
# ' '
DESCENDANT = 1
# >
CHILD = 2
# +
NEXT_SIBLING = 3
# ~
SUBSEQUENT_SIBLING = 4
def _tag_is_void(tag: str) -> bool:
"""
Checks whether the tag corresponds to a void element.
https://www.w3.org/TR/html5/syntax.html#void-elements
https://html.spec.whatwg.org/multipage/syntax.html#void-elements
"""
return tag.lower() in (
"area",
"base",
"br",
"col",
"embed",
"hr",
"img",
"input",
"link",
"meta",
"param",
"source",
"track",
"wbr",
)
### end dim ###
# Global helper functions
def open_url(url):
"""Open an URL in the user's default web browser.
The string attribute ``open_url.url_handler`` can be used to open URLs
in a custom CLI script or utility. A subprocess is spawned with url as
the parameter in this case instead of the usual webbrowser.open() call.
Whether the browser's output (both stdout and stderr) are suppressed
depends on the boolean attribute ``open_url.suppress_browser_output``.
If the attribute is not set upon a call, set it to a default value,
which means False if BROWSER is set to a known text-based browser --
elinks, links, lynx, w3m or 'www-browser'; or True otherwise.
The string attribute ``open_url.override_text_browser`` can be used to
ignore env var BROWSER as well as some known text-based browsers and
attempt to open url in a GUI browser available.
Note: If a GUI browser is indeed found, this option ignores the program
option `show-browser-logs`
"""
logger.debug('Opening %s', url)
# Custom URL handler gets max priority
if hasattr(open_url, 'url_handler'):
p = Popen([open_url.url_handler, url], stdin=PIPE)
p.communicate()
return
browser = webbrowser.get()
if open_url.override_text_browser:
browser_output = open_url.suppress_browser_output
for name in [b for b in webbrowser._tryorder if b not in text_browsers]:
browser = webbrowser.get(name)
logger.debug(browser)
# Found a GUI browser, suppress browser output
open_url.suppress_browser_output = True
break
if open_url.suppress_browser_output:
_stderr = os.dup(2)
os.close(2)
_stdout = os.dup(1)
os.close(1)
fd = os.open(os.devnull, os.O_RDWR)
os.dup2(fd, 2)
os.dup2(fd, 1)
try:
browser.open(url, new=2)
finally:
if open_url.suppress_browser_output:
os.close(fd)
os.dup2(_stderr, 2)
os.dup2(_stdout, 1)
if open_url.override_text_browser:
open_url.suppress_browser_output = browser_output
def printerr(msg):
"""Print message, verbatim, to stderr.
``msg`` could be any stringifiable value.
"""
print(msg, file=sys.stderr)
def unwrap(text):
"""Unwrap text."""
lines = text.split('\n')
result = ''
for i in range(len(lines) - 1):
result += lines[i]
if not lines[i]:
# Paragraph break
result += '\n\n'
elif lines[i + 1]:
# Next line is not paragraph break, add space
result += ' '
# Handle last line
result += lines[-1] if lines[-1] else '\n'
return result
def check_stdout_encoding():
"""Make sure stdout encoding is utf-8.
If not, print error message and instructions, then exit with
status 1.
This function is a no-op on win32 because encoding on win32 is
messy, and let's just hope for the best. /s
"""
if sys.platform == 'win32':
return
# Use codecs.lookup to resolve text encoding alias
encoding = codecs.lookup(sys.stdout.encoding).name
if encoding != 'utf-8':
locale_lang, locale_encoding = locale.getlocale()
if locale_lang is None:
locale_lang = '<unknown>'
if locale_encoding is None:
locale_encoding = '<unknown>'
ioencoding = os.getenv('PYTHONIOENCODING', 'not set')
sys.stderr.write(unwrap(textwrap.dedent("""\
stdout encoding '{encoding}' detected. googler requires utf-8 to
work properly. The wrong encoding may be due to a non-UTF-8
locale or an improper PYTHONIOENCODING. (For the record, your
locale language is {locale_lang} and locale encoding is
{locale_encoding}; your PYTHONIOENCODING is {ioencoding}.)
Please set a UTF-8 locale (e.g., en_US.UTF-8) or set
PYTHONIOENCODING to utf-8.
""".format(
encoding=encoding,
locale_lang=locale_lang,
locale_encoding=locale_encoding,
ioencoding=ioencoding,
))))
sys.exit(1)
# Classes
class HardenedHTTPSConnection(HTTPSConnection):
"""Overrides HTTPSConnection.connect to specify TLS version
NOTE: TLS 1.2 is supported from Python 3.4
"""
def __init__(self, host, **kwargs):
HTTPSConnection.__init__(self, host, **kwargs)
def connect(self, notweak=False):
sock = socket.create_connection((self.host, self.port),
self.timeout, self.source_address)
# Optimizations not available on OS X
if not notweak and sys.platform.startswith('linux'):
try:
sock.setsockopt(socket.SOL_TCP, socket.TCP_DEFER_ACCEPT, 1)
sock.setsockopt(socket.IPPROTO_TCP, socket.TCP_QUICKACK, 1)
sock.setsockopt(socket.SOL_SOCKET, socket.SO_RCVBUF, 524288)
except OSError:
# Doesn't work on Windows' Linux subsystem (#179)
logger.debug('setsockopt failed')
if getattr(self, '_tunnel_host', None):
self.sock = sock
elif not notweak:
# Try to use TLS 1.2
ssl_context = None
if hasattr(ssl, 'PROTOCOL_TLS'):
# Since Python 3.5.3
ssl_context = ssl.SSLContext(ssl.PROTOCOL_TLS)
if hasattr(ssl_context, "minimum_version"):
# Python 3.7 with OpenSSL 1.1.0g or later
ssl_context.minimum_version = ssl.TLSVersion.TLSv1_2
else:
ssl_context.options |= (ssl.OP_NO_SSLv2 | ssl.OP_NO_SSLv3 |
ssl.OP_NO_TLSv1 | ssl.OP_NO_TLSv1_1)
elif hasattr(ssl, 'PROTOCOL_TLSv1_2'):
# Since Python 3.4
ssl_context = ssl.SSLContext(ssl.PROTOCOL_TLSv1_2)
if ssl_context:
self.sock = ssl_context.wrap_socket(sock)
return
# Fallback
HTTPSConnection.connect(self)
class GoogleUrl(object):
"""
This class constructs the Google Search/News URL.
This class is modelled on urllib.parse.ParseResult for familiarity,
which means it supports reading of all six attributes -- scheme,
netloc, path, params, query, fragment -- of
urllib.parse.ParseResult, as well as the geturl() method.
However, the attributes (properties) and methods listed below should
be the preferred methods of access to this class.
Parameters
----------
opts : dict or argparse.Namespace, optional
See the ``opts`` parameter of `update`.
Other Parameters
----------------
See "Other Parameters" of `update`.
Attributes
----------
hostname : str
Read-write property.
keywords : str or list of strs
Read-write property.
news : bool
Read-only property.
url : str
Read-only property.
Methods
-------
full()
relative()
update(opts=None, **kwargs)
set_queries(**kwargs)
unset_queries(*args)
next_page()
prev_page()
first_page()
"""
def __init__(self, opts=None, **kwargs):
self.scheme = 'https'
# self.netloc is a calculated property
self.path = '/search'
self.params = ''
# self.query is a calculated property
self.fragment = ''
self._tld = None
self._num = 10
self._start = 0
self._keywords = []
self._sites = None
self._query_dict = {
'ie': 'UTF-8',
'oe': 'UTF-8',
#'gbv': '1', # control the presence of javascript on the page, 1=no js, 2=js
'sei': base64.encodebytes(uuid.uuid1().bytes).decode("ascii").rstrip('=\n').replace('/', '_'),
}
self.update(opts, **kwargs)
def __str__(self):
return self.url
@property
def url(self):
"""The full Google URL you want."""
return self.full()
@property
def hostname(self):
"""The hostname."""
return self.netloc
@hostname.setter
def hostname(self, hostname):
self.netloc = hostname
@property
def keywords(self):
"""The keywords, either a str or a list of strs."""
return self._keywords
@keywords.setter
def keywords(self, keywords):
self._keywords = keywords
@property
def news(self):
"""Whether the URL is for Google News."""
return 'tbm' in self._query_dict and self._query_dict['tbm'] == 'nws'
def full(self):
"""Return the full URL.
Returns
-------
str
"""
url = (self.scheme + ':') if self.scheme else ''
url += '//' + self.netloc + self.relative()
return url
def relative(self):
"""Return the relative URL (without scheme and authority).
Authority (see RFC 3986 section 3.2), or netloc in the
terminology of urllib.parse, basically means the hostname
here. The relative URL is good for making HTTP(S) requests to a
known host.
Returns
-------
str
"""
rel = self.path
if self.params:
rel += ';' + self.params
if self.query:
rel += '?' + self.query
if self.fragment:
rel += '#' + self.fragment
return rel
def update(self, opts=None, **kwargs):
"""Update the URL with the given options.
Parameters
----------
opts : dict or argparse.Namespace, optional
Carries options that affect the Google Search/News URL. The
list of currently recognized option keys with expected value
types:
duration: str (GooglerArgumentParser.is_duration)
exact: bool
keywords: str or list of strs
lang: str
news: bool
num: int
site: str
start: int
tld: str
unfilter: bool
Other Parameters
----------------
kwargs
The `kwargs` dict extends `opts`, that is, options can be
specified either way, in `opts` or as individual keyword
arguments.
"""
if opts is None:
opts = {}
if hasattr(opts, '__dict__'):
opts = opts.__dict__
opts.update(kwargs)
qd = self._query_dict
if 'duration' in opts and opts['duration']:
qd['tbs'] = 'qdr:%s' % opts['duration']
if 'exact' in opts:
if opts['exact']:
qd['nfpr'] = 1
else:
qd.pop('nfpr', None)
if 'keywords' in opts:
self._keywords = opts['keywords']
if 'lang' in opts and opts['lang']:
qd['hl'] = opts['lang']
if 'news' in opts:
if opts['news']:
qd['tbm'] = 'nws'
else:
qd.pop('tbm', None)
if 'num' in opts:
self._num = opts['num']
if 'sites' in opts:
self._sites = opts['sites']
if 'start' in opts:
self._start = opts['start']
if 'tld' in opts:
self._tld = opts['tld']
if 'unfilter' in opts and opts['unfilter']:
qd['filter'] = 0
def set_queries(self, **kwargs):
"""Forcefully set queries outside the normal `update` mechanism.
Other Parameters
----------------
kwargs
Arbitrary key value pairs to be set in the query string. All
keys and values should be stringifiable.
Note that certain keys, e.g., ``q``, have their values
constructed on the fly, so setting those has no actual
effect.
"""
for k, v in kwargs.items():
self._query_dict[k] = v
def unset_queries(self, *args):
"""Forcefully unset queries outside the normal `update` mechanism.
Other Parameters
----------------
args
Arbitrary keys to be unset. No exception is raised if a key
does not exist in the first place.
Note that certain keys, e.g., ``q``, are always included in
the resulting URL, so unsetting those has no actual effect.
"""
for k in args:
self._query_dict.pop(k, None)
def next_page(self):
"""Navigate to the next page."""
self._start += self._num
def prev_page(self):
"""Navigate to the previous page.
Raises
------
ValueError
If already at the first page (``start=0`` in the current
query string).
"""
if self._start == 0:
raise ValueError('Already at the first page.')
self._start = (self._start - self._num) if self._start > self._num else 0
def first_page(self):
"""Navigate to the first page.
Raises
------
ValueError
If already at the first page (``start=0`` in the current
query string).
"""
if self._start == 0:
raise ValueError('Already at the first page.')
self._start = 0
# Data source: https://web.archive.org/web/20170615200243/https://en.wikipedia.org/wiki/List_of_Google_domains
# Scraper script: https://gist.github.com/zmwangx/b976e83c14552fe18b71
TLD_TO_DOMAIN_MAP = {
'ac': 'google.ac', 'ad': 'google.ad', 'ae': 'google.ae',
'af': 'google.com.af', 'ag': 'google.com.ag', 'ai': 'google.com.ai',
'al': 'google.al', 'am': 'google.am', 'ao': 'google.co.ao',
'ar': 'google.com.ar', 'as': 'google.as', 'at': 'google.at',
'au': 'google.com.au', 'az': 'google.az', 'ba': 'google.ba',
'bd': 'google.com.bd', 'be': 'google.be', 'bf': 'google.bf',
'bg': 'google.bg', 'bh': 'google.com.bh', 'bi': 'google.bi',
'bj': 'google.bj', 'bn': 'google.com.bn', 'bo': 'google.com.bo',
'br': 'google.com.br', 'bs': 'google.bs', 'bt': 'google.bt',
'bw': 'google.co.bw', 'by': 'google.by', 'bz': 'google.com.bz',
'ca': 'google.ca', 'cat': 'google.cat', 'cc': 'google.cc',
'cd': 'google.cd', 'cf': 'google.cf', 'cg': 'google.cg',
'ch': 'google.ch', 'ci': 'google.ci', 'ck': 'google.co.ck',
'cl': 'google.cl', 'cm': 'google.cm', 'cn': 'google.cn',
'co': 'google.com.co', 'cr': 'google.co.cr', 'cu': 'google.com.cu',
'cv': 'google.cv', 'cy': 'google.com.cy', 'cz': 'google.cz',
'de': 'google.de', 'dj': 'google.dj', 'dk': 'google.dk',
'dm': 'google.dm', 'do': 'google.com.do', 'dz': 'google.dz',
'ec': 'google.com.ec', 'ee': 'google.ee', 'eg': 'google.com.eg',
'es': 'google.es', 'et': 'google.com.et', 'fi': 'google.fi',
'fj': 'google.com.fj', 'fm': 'google.fm', 'fr': 'google.fr',
'ga': 'google.ga', 'ge': 'google.ge', 'gf': 'google.gf',
'gg': 'google.gg', 'gh': 'google.com.gh', 'gi': 'google.com.gi',
'gl': 'google.gl', 'gm': 'google.gm', 'gp': 'google.gp',
'gr': 'google.gr', 'gt': 'google.com.gt', 'gy': 'google.gy',
'hk': 'google.com.hk', 'hn': 'google.hn', 'hr': 'google.hr',
'ht': 'google.ht', 'hu': 'google.hu', 'id': 'google.co.id',
'ie': 'google.ie', 'il': 'google.co.il', 'im': 'google.im',
'in': 'google.co.in', 'io': 'google.io', 'iq': 'google.iq',
'is': 'google.is', 'it': 'google.it', 'je': 'google.je',
'jm': 'google.com.jm', 'jo': 'google.jo', 'jp': 'google.co.jp',
'ke': 'google.co.ke', 'kg': 'google.kg', 'kh': 'google.com.kh',
'ki': 'google.ki', 'kr': 'google.co.kr', 'kw': 'google.com.kw',
'kz': 'google.kz', 'la': 'google.la', 'lb': 'google.com.lb',
'lc': 'google.com.lc', 'li': 'google.li', 'lk': 'google.lk',
'ls': 'google.co.ls', 'lt': 'google.lt', 'lu': 'google.lu',
'lv': 'google.lv', 'ly': 'google.com.ly', 'ma': 'google.co.ma',
'md': 'google.md', 'me': 'google.me', 'mg': 'google.mg',
'mk': 'google.mk', 'ml': 'google.ml', 'mm': 'google.com.mm',
'mn': 'google.mn', 'ms': 'google.ms', 'mt': 'google.com.mt',
'mu': 'google.mu', 'mv': 'google.mv', 'mw': 'google.mw',
'mx': 'google.com.mx', 'my': 'google.com.my', 'mz': 'google.co.mz',
'na': 'google.com.na', 'ne': 'google.ne', 'nf': 'google.com.nf',
'ng': 'google.com.ng', 'ni': 'google.com.ni', 'nl': 'google.nl',
'no': 'google.no', 'np': 'google.com.np', 'nr': 'google.nr',
'nu': 'google.nu', 'nz': 'google.co.nz', 'om': 'google.com.om',
'pa': 'google.com.pa', 'pe': 'google.com.pe', 'pg': 'google.com.pg',
'ph': 'google.com.ph', 'pk': 'google.com.pk', 'pl': 'google.pl',
'pn': 'google.co.pn', 'pr': 'google.com.pr', 'ps': 'google.ps',
'pt': 'google.pt', 'py': 'google.com.py', 'qa': 'google.com.qa',
'ro': 'google.ro', 'rs': 'google.rs', 'ru': 'google.ru',
'rw': 'google.rw', 'sa': 'google.com.sa', 'sb': 'google.com.sb',
'sc': 'google.sc', 'se': 'google.se', 'sg': 'google.com.sg',
'sh': 'google.sh', 'si': 'google.si', 'sk': 'google.sk',
'sl': 'google.com.sl', 'sm': 'google.sm', 'sn': 'google.sn',
'so': 'google.so', 'sr': 'google.sr', 'st': 'google.st',
'sv': 'google.com.sv', 'td': 'google.td', 'tg': 'google.tg',
'th': 'google.co.th', 'tj': 'google.com.tj', 'tk': 'google.tk',
'tl': 'google.tl', 'tm': 'google.tm', 'tn': 'google.tn',
'to': 'google.to', 'tr': 'google.com.tr', 'tt': 'google.tt',
'tw': 'google.com.tw', 'tz': 'google.co.tz', 'ua': 'google.com.ua',
'ug': 'google.co.ug', 'uk': 'google.co.uk', 'uy': 'google.com.uy',
'uz': 'google.co.uz', 'vc': 'google.com.vc', 've': 'google.co.ve',
'vg': 'google.vg', 'vi': 'google.co.vi', 'vn': 'google.com.vn',
'vu': 'google.vu', 'ws': 'google.ws', 'za': 'google.co.za',
'zm': 'google.co.zm', 'zw': 'google.co.zw',
}
@property
def netloc(self):
"""The hostname."""
try:
return 'www.' + self.TLD_TO_DOMAIN_MAP[self._tld]
except KeyError:
return 'www.google.com'
@property
def query(self):
"""The query string."""
qd = {}
qd.update(self._query_dict)
if self._num != 10: # Skip sending the default
qd['num'] = self._num
if self._start: # Skip sending the default
qd['start'] = self._start
# Construct the q query
q = ''
keywords = self._keywords
sites = self._sites
if keywords:
if isinstance(keywords, list):
q += '+'.join(urllib.parse.quote_plus(kw) for kw in keywords)
else:
q += urllib.parse.quote_plus(keywords)
if sites:
q += '+OR'.join('+site:' + urllib.parse.quote_plus(site) for site in sites)
qd['q'] = q
return '&'.join('%s=%s' % (k, qd[k]) for k in sorted(qd.keys()))
class GoogleConnectionError(Exception):
pass
class GoogleConnection(object):
"""
This class facilitates connecting to and fetching from Google.
Parameters
----------
See http.client.HTTPSConnection for documentation of the
parameters.
Raises
------
GoogleConnectionError
Attributes
----------
host : str
The currently connected host. Read-only property. Use
`new_connection` to change host.
Methods
-------
new_connection(host=None, port=None, timeout=45)
renew_connection(timeout=45)
fetch_page(url)
close()
"""
def __init__(self, host, port=None, timeout=45, proxy=None, notweak=False):
self._host = None
self._port = None
self._proxy = proxy
self._notweak = notweak
self._conn = None
self.new_connection(host, port=port, timeout=timeout)
self.cookie = ''
@property
def host(self):
"""The host currently connected to."""
return self._host
def new_connection(self, host=None, port=None, timeout=45):
"""Close the current connection (if any) and establish a new one.
Parameters
----------
See http.client.HTTPSConnection for documentation of the
parameters. Renew the connection (i.e., reuse the current host
and port) if host is None or empty.
Raises
------
GoogleConnectionError
"""
if self._conn:
self._conn.close()
if not host:
host = self._host
port = self._port
self._host = host
self._port = port
host_display = host + (':%d' % port if port else '')
proxy = self._proxy
if proxy:
proxy_user_passwd, proxy_host_port = parse_proxy_spec(proxy)
logger.debug('Connecting to proxy server %s', proxy_host_port)
self._conn = HardenedHTTPSConnection(proxy_host_port, timeout=timeout)
logger.debug('Tunnelling to host %s' % host_display)
connect_headers = {}
if proxy_user_passwd:
connect_headers['Proxy-Authorization'] = 'Basic %s' % base64.b64encode(
proxy_user_passwd.encode('utf-8')
).decode('utf-8')
self._conn.set_tunnel(host, port=port, headers=connect_headers)
try:
self._conn.connect(self._notweak)
except Exception as e:
msg = 'Failed to connect to proxy server %s: %s.' % (proxy, e)
raise GoogleConnectionError(msg)
else:
logger.debug('Connecting to new host %s', host_display)
self._conn = HardenedHTTPSConnection(host, port=port, timeout=timeout)
try:
self._conn.connect(self._notweak)
except Exception as e:
msg = 'Failed to connect to %s: %s.' % (host_display, e)
raise GoogleConnectionError(msg)
def renew_connection(self, timeout=45):
"""Renew current connection.
Equivalent to ``new_connection(timeout=timeout)``.
"""
self.new_connection(timeout=timeout)
def fetch_page(self, url):
"""Fetch a URL.
Allows one reconnection and multiple redirections before failing
and raising GoogleConnectionError.
Parameters
----------
url : str
The URL to fetch, relative to the host.
Raises
------
GoogleConnectionError
When not getting HTTP 200 even after the allowed one
reconnection and/or one redirection, or when Google is
blocking query due to unusual activity.
Returns
-------
str
Response payload, gunzipped (if applicable) and decoded (in UTF-8).
"""
try:
self._raw_get(url)
except (http.client.HTTPException, OSError) as e:
logger.debug('Got exception: %s.', e)
logger.debug('Attempting to reconnect...')
self.renew_connection()
try:
self._raw_get(url)
except http.client.HTTPException as e:
logger.debug('Got exception: %s.', e)
raise GoogleConnectionError("Failed to get '%s'." % url)
resp = self._resp
redirect_counter = 0
while resp.status != 200 and redirect_counter < 3:
if resp.status in {301, 302, 303, 307, 308}:
redirection_url = resp.getheader('location', '')
if 'sorry/IndexRedirect?' in redirection_url or 'sorry/index?' in redirection_url:
msg = textwrap.dedent("""\
Connection blocked due to unusual activity.
THIS IS NOT A BUG, please do NOT report it as a bug unless you have specific
information that may lead to the development of a workaround.
You IP address is temporarily or permanently blocked by Google and requires
reCAPTCHA-solving to use the service, which googler is not capable of.
Possible causes include issuing too many queries in a short time frame, or
operating from a shared / low reputation IP with a history of abuse.
Please do NOT use googler for automated scraping.""")
msg = " ".join(msg.splitlines())
raise GoogleConnectionError(msg)
self._redirect(redirection_url)
resp = self._resp
redirect_counter += 1
else:
break
if resp.status != 200:
raise GoogleConnectionError('Got HTTP %d: %s' % (resp.status, resp.reason))
payload = resp.read()
try:
return gzip.decompress(payload).decode('utf-8')
except OSError:
# Not gzipped
return payload.decode('utf-8')
def _redirect(self, url):
"""Redirect to and fetch a new URL.
Like `_raw_get`, the response is stored in ``self._resp``. A new
connection is made if redirecting to a different host.
Parameters
----------
url : str
If absolute and points to a different host, make a new
connection.
Raises
------
GoogleConnectionError
"""
logger.debug('Redirecting to URL %s', url)
segments = urllib.parse.urlparse(url)
host = segments.netloc
if host != self._host:
self.new_connection(host)
relurl = urllib.parse.urlunparse(('', '') + segments[2:])
try:
self._raw_get(relurl)
except http.client.HTTPException as e:
logger.debug('Got exception: %s.', e)
raise GoogleConnectionError("Failed to get '%s'." % url)
def _raw_get(self, url):
"""Make a raw HTTP GET request.
No status check (which implies no redirection). Response can be
accessed from ``self._resp``.
Parameters
----------
url : str
URL relative to the host, used in the GET request.
Raises
------
http.client.HTTPException
"""
logger.debug('Fetching URL %s', url)
self._conn.request('GET', url, None, {
'Accept': 'text/html',
'Accept-Encoding': 'gzip',
'User-Agent': USER_AGENT,
'Cookie': self.cookie,
'Connection': 'keep-alive',
'DNT': '1',
})
self._resp = self._conn.getresponse()
if self.cookie == '':
complete_cookie = self._resp.getheader('Set-Cookie')
# Cookie won't be available if already blocked
if complete_cookie is not None:
self.cookie = complete_cookie[:complete_cookie.find(';')]
logger.debug('Cookie: %s' % self.cookie)
def close(self):
"""Close the connection (if one is active)."""
if self._conn:
self._conn.close()
class GoogleParser(object):
def __init__(self, html, *, news=False):
self.news = news
self.autocorrected = False
self.showing_results_for = None
self.filtered = False
self.results = []
self.parse(html)
def parse(self, html):
tree = parse_html(html)
if debugger:
printerr('\x1b[1mInspect the DOM through the \x1b[4mtree\x1b[24m variable.\x1b[0m')
printerr('')
try:
import IPython
IPython.embed()
except ImportError:
import pdb
pdb.set_trace()
index = 0
for div_g in tree.select_all('div.g'):
if div_g.select('.hp-xpdbox'):
# Skip smart cards.
continue
try:
h3 = div_g.select('h3.r')
a = h3.select('a')
title = a.text
mime = div_g.select('.mime')
if mime:
title = mime.text + ' ' + title
url = self.unwrap_link(a.attr('href'))
matched_keywords = []
abstract = ''
for childnode in div_g.select('.st').children:
if childnode.tag == 'b' and childnode.text != '...':
matched_keywords.append({'phrase': childnode.text, 'offset': len(abstract)})
abstract = abstract + childnode.text.replace('\n', '')
try:
metadata = div_g.select('.slp').text
metadata = metadata.replace('\u200e', '').replace(' - ', ', ').strip()
except AttributeError:
metadata = None
except (AttributeError, ValueError):
continue
sitelinks = []
for td in div_g.select_all('td'):
try:
a = td.select('a')
sl_title = a.text
sl_url = self.unwrap_link(a.attr('href'))
sl_abstract = td.select('div.s.st').text
sitelinks.append(Sitelink(sl_title, sl_url, sl_abstract))
except (AttributeError, ValueError):
continue
index += 1
self.results.append(Result(index, title, url, abstract,
metadata=metadata, sitelinks=sitelinks, matches=matched_keywords))
# Showing results for ...
# Search instead for ...
spell_orig = tree.select("span.spell_orig")
if spell_orig:
self.autocorrected = True
self.showing_results_for = next(
filter(lambda el: el.tag == "a", spell_orig.previous_siblings()), None
).text
# No results found for ...
# Results for ...:
alt_query_infobox = tree.select('#topstuff')
if alt_query_infobox:
bolds = alt_query_infobox.select_all('div b')
if len(bolds) == 2:
self.showing_results_for = bolds[1].text
# In order to show you the most relevant results, we have
# omitted some entries very similar to the N already displayed.
# ...
self.filtered = tree.select('p#ofr') is not None
# Unwraps /url?q=http://...&sa=...
# May raise ValueError.
@staticmethod
def unwrap_link(link):
qs = urllib.parse.urlparse(link).query
try:
url = urllib.parse.parse_qs(qs)['q'][0]
except KeyError:
raise ValueError(link)
else:
if "://" in url:
return url
else:
# Google's internal services link, e.g.,
# /search?q=google&..., which cannot be unwrapped into
# an actual URL.
raise ValueError(link)
class Sitelink(object):
"""Container for a sitelink."""
def __init__(self, title, url, abstract):
self.title = title
self.url = url
self.abstract = abstract
self.index = ''
Colors = collections.namedtuple('Colors', 'index, title, url, metadata, abstract, prompt, reset')
class Result(object):
"""
Container for one search result, with output helpers.
Parameters
----------
index : int or str
title : str
url : str
abstract : str
metadata : str, optional
Only applicable to Google News results, with publisher name and
publishing time.
sitelinks : list, optional
List of ``SiteLink`` objects.
Attributes
----------
index : str
title : str
url : str
abstract : str
metadata : str or None
sitelinks : list
matches : list
Class Variables
---------------
colors : str
nohl : bool
Methods
-------
print()
jsonizable_object()
urltable()
"""
# Class variables
colors = None
nohl = False
urlexpand = True
def __init__(self, index, title, url, abstract, metadata=None, sitelinks=None, matches=None):
index = str(index)
self.index = index
self.title = title
self.url = url
self.abstract = abstract
self.metadata = metadata
self.sitelinks = [] if sitelinks is None else sitelinks
self.matches = [] if matches is None else matches
self._urltable = {index: url}
subindex = 'a'
for sitelink in self.sitelinks:
fullindex = index + subindex
sitelink.index = fullindex
self._urltable[fullindex] = sitelink.url
subindex = chr(ord(subindex) + 1)
def _print_title_and_url(self, index, title, url, indent=3, pre=0):
colors = self.colors
if not self.urlexpand:
url = '[' + urllib.parse.urlparse(url).netloc + ']'
if colors:
# Adjust index to print result index clearly
print(" %s%s%-*s%s" % (' ' * pre, colors.index, indent, index + '.', colors.reset), end='')
if not self.urlexpand:
print(' ' + colors.title + title + colors.reset + ' ' + colors.url + url + colors.reset)
else:
print(' ' + colors.title + title + colors.reset)
print(' ' * (indent + 2 + pre) + colors.url + url + colors.reset)
else:
if self.urlexpand:
print(' %s%-*s %s' % (' ' * pre, indent, index + '.', title))
print(' %s%s' % (' ' * (indent + 1 + pre), url))
else:
print(' %s%-*s %s %s' % (' ' * pre, indent, index + '.', title, url))
def _print_metadata_and_abstract(self, abstract, metadata=None, matches=None, indent=5, pre=0):
colors = self.colors
try:
columns, _ = os.get_terminal_size()
except OSError:
columns = 0
if metadata:
if colors:
print(' ' * (indent + pre) + colors.metadata + metadata + colors.reset)
else:
print(' ' * (indent + pre) + metadata)
if colors and not self.nohl:
# Start from the last match, as inserting the bold characters changes the offsets.
for match in reversed(matches or []):
abstract = (
abstract[: match['offset']]
+ '\033[1m'
+ match['phrase']
+ '\033[0m'
+ abstract[match['offset'] + len(match['phrase']) :]
)
print(colors.abstract, end='')
if columns > indent + 1 + pre:
# Try to fill to columns
fillwidth = columns - indent - 1
for line in textwrap.wrap(abstract.replace('\n', ''), width=fillwidth):
print('%s%s' % (' ' * (indent + pre), line))
print('')
else:
print('%s%s\n' % (' ' * pre, abstract.replace('\n', ' ')))
if colors:
print(colors.reset, end='')
def print(self):
"""Print the result entry."""
self._print_title_and_url(self.index, self.title, self.url)
self._print_metadata_and_abstract(self.abstract, metadata=self.metadata, matches=self.matches)
for sitelink in self.sitelinks:
self._print_title_and_url(sitelink.index, sitelink.title, sitelink.url, pre=4)
self._print_metadata_and_abstract(sitelink.abstract, pre=4)
def jsonizable_object(self):
"""Return a JSON-serializable dict representing the result entry."""
obj = {
'title': self.title,
'url': self.url,
'abstract': self.abstract
}
if self.metadata:
obj['metadata'] = self.metadata
if self.sitelinks:
obj['sitelinks'] = [sitelink.__dict__ for sitelink in self.sitelinks]
if self.matches:
obj['matches'] = self.matches
return obj
def urltable(self):
"""Return a index-to-URL table for the current result.
Normally, the table contains only a single entry, but when the result
contains sitelinks, all sitelinks are included in this table.
Returns
-------
dict
A dict mapping indices (strs) to URLs (also strs). Indices of
sitelinks are the original index appended by lowercase letters a,
b, c, etc.
"""
return self._urltable
class GooglerCmdException(Exception):
pass
class NoKeywordsException(GooglerCmdException):
pass
def require_keywords(method):
# Require keywords to be set before we run a GooglerCmd method. If
# no keywords have been set, raise a NoKeywordsException.
@functools.wraps(method)
def enforced_method(self, *args, **kwargs):
if not self.keywords:
raise NoKeywordsException('No keywords.')
method(self, *args, **kwargs)
return enforced_method
def no_argument(method):
# Normalize a do_* method of GooglerCmd that takes no argument to
# one that takes an arg, but issue a warning when an nonempty
# argument is given.
@functools.wraps(method)
def enforced_method(self, arg):
if arg:
method_name = arg.__name__
command_name = method_name[3:] if method_name.startswith('do_') else method_name
logger.warning("Argument to the '%s' command ignored.", command_name)
method(self)
return enforced_method
class GooglerCmd(object):
"""
Command line interpreter and executor class for googler.
Inspired by PSL cmd.Cmd.
Parameters
----------
opts : argparse.Namespace
Options and/or arguments.
Attributes
----------
options : argparse.Namespace
Options that are currently in effect. Read-only attribute.
keywords : str or list or strs
Current keywords. Read-only attribute
Methods
-------
fetch()
display_results(prelude='\n', json_output=False)
fetch_and_display(prelude='\n', json_output=False, interactive=True)
read_next_command()
help()
cmdloop()
"""
# Class variables
colors = None
re_url_index = re.compile(r"\d+(a-z)?")
def __init__(self, opts):
super().__init__()
self._opts = opts
self._google_url = GoogleUrl(opts)
proxy = opts.proxy if hasattr(opts, 'proxy') else None
self._conn = GoogleConnection(self._google_url.hostname, proxy=proxy,
notweak=opts.notweak)
atexit.register(self._conn.close)
self.results = []
self._autocorrected = None
self._showing_results_for = None
self._results_filtered = False
self._urltable = {}
self.promptcolor = True if os.getenv('DISABLE_PROMPT_COLOR') is None else False
@property
def options(self):
"""Current options."""
return self._opts
@property
def keywords(self):
"""Current keywords."""
return self._google_url.keywords
@require_keywords
def fetch(self):
"""Fetch a page and parse for results.
Results are stored in ``self.results``.
Raises
------
GoogleConnectionError
See Also
--------
fetch_and_display
"""
# This method also sets self._results_filtered and
# self._urltable.
page = self._conn.fetch_page(self._google_url.relative())
if logger.isEnabledFor(logging.DEBUG):
import tempfile
fd, tmpfile = tempfile.mkstemp(prefix='googler-response-', suffix='.html')
os.close(fd)
with open(tmpfile, 'w', encoding='utf-8') as fp:
fp.write(page)
logger.debug("Response body written to '%s'.", tmpfile)
parser = GoogleParser(page, news=self._google_url.news)
self.results = parser.results
self._autocorrected = parser.autocorrected
self._showing_results_for = parser.showing_results_for
self._results_filtered = parser.filtered
self._urltable = {}
for r in self.results:
self._urltable.update(r.urltable())
@require_keywords
def display_results(self, prelude='\n', json_output=False):
"""Display results stored in ``self.results``.
Parameters
----------
See `fetch_and_display`.
"""
if json_output:
# JSON output
import json
results_object = [r.jsonizable_object() for r in self.results]
print(json.dumps(results_object, indent=2, sort_keys=True, ensure_ascii=False))
else:
# Regular output
if not self.results:
print('No results.', file=sys.stderr)
else:
sys.stderr.write(prelude)
for r in self.results:
r.print()
@require_keywords
def showing_results_for_alert(self, interactive=True):
colors = self.colors
if self._showing_results_for:
if colors:
# Underline the query
actual_query = '\x1b[4m' + self._showing_results_for + '\x1b[24m'
else:
actual_query = self._showing_results_for
if self._autocorrected:
if interactive:
info = 'Showing results for %s; enter "x" for an exact search.' % actual_query
else:
info = 'Showing results for %s; use -x, --exact for an exact search.' % actual_query
else:
info = 'No results found; showing results for %s.' % actual_query
if interactive:
printerr('')
if colors:
printerr(colors.prompt + info + colors.reset)
else:
printerr('** ' + info)
@require_keywords
def fetch_and_display(self, prelude='\n', json_output=False, interactive=True):
"""Fetch a page and display results.
Results are stored in ``self.results``.
Parameters
----------
prelude : str, optional
A string that is written to stderr before showing actual results,
usually serving as a separator. Default is an empty line.
json_output : bool, optional
Whether to dump results in JSON format. Default is False.
interactive : bool, optional
Whether to show contextual instructions, when e.g. Google
has filtered the results. Default is True.
Raises
------
GoogleConnectionError
See Also
--------
fetch
display_results
"""
self.fetch()
self.showing_results_for_alert()
self.display_results(prelude=prelude, json_output=json_output)
if self._results_filtered:
colors = self.colors
info = 'Enter "unfilter" to show similar results Google omitted.'
if colors:
printerr(colors.prompt + info + colors.reset)
else:
printerr('** ' + info)
printerr('')
def read_next_command(self):
"""Show omniprompt and read user command line.
Command line is always stripped, and each consecutive group of
whitespace is replaced with a single space character. If the
command line is empty after stripping, when ignore it and keep
reading. Exit with status 0 if we get EOF or an empty line
(pre-strip, that is, a raw <enter>) twice in a row.
The new command line (non-empty) is stored in ``self.cmd``.
"""
colors = self.colors
message = 'googler (? for help)'
prompt = (colors.prompt + message + colors.reset + ' ') if (colors and self.promptcolor) else (message + ': ')
enter_count = 0
while True:
try:
cmd = input(prompt)
except EOFError:
sys.exit(0)
if not cmd:
enter_count += 1
if enter_count == 2:
# Double <enter>
sys.exit(0)
else:
enter_count = 0
cmd = ' '.join(cmd.split())
if cmd:
self.cmd = cmd
break
@staticmethod
def help():
GooglerArgumentParser.print_omniprompt_help(sys.stderr)
printerr('')
@require_keywords
@no_argument
def do_first(self):
try:
self._google_url.first_page()
except ValueError as e:
print(e, file=sys.stderr)
return
self.fetch_and_display()
def do_google(self, arg):
# Update keywords and reconstruct URL
self._opts.keywords = arg
self._google_url = GoogleUrl(self._opts)
self.fetch_and_display()
@require_keywords
@no_argument
def do_next(self):
# If > 5 results are being fetched each time,
# block next when no parsed results in current fetch
if not self.results and self._google_url._num > 5:
printerr('No results.')
else:
self._google_url.next_page()
self.fetch_and_display()
@require_keywords
def do_open(self, *args):
if not args:
open_url(self._google_url.full())
return
for nav in args:
if nav == 'a':
for key, value in sorted(self._urltable.items()):
open_url(self._urltable[key])
elif nav in self._urltable:
open_url(self._urltable[nav])
elif '-' in nav:
try:
vals = [int(x) for x in nav.split('-')]
if (len(vals) != 2):
printerr('Invalid range %s.' % nav)
continue
if vals[0] > vals[1]:
vals[0], vals[1] = vals[1], vals[0]
for _id in range(vals[0], vals[1] + 1):
if str(_id) in self._urltable:
open_url(self._urltable[str(_id)])
else:
printerr('Invalid index %s.' % _id)
except ValueError:
printerr('Invalid range %s.' % nav)
else:
printerr('Invalid index %s.' % nav)
@require_keywords
@no_argument
def do_previous(self):
try:
self._google_url.prev_page()
except ValueError as e:
print(e, file=sys.stderr)
return
self.fetch_and_display()
@require_keywords
@no_argument
def do_exact(self):
# Reset start to 0 when exact is applied.
self._google_url.update(start=0, exact=True)
self.fetch_and_display()
@require_keywords
@no_argument
def do_unfilter(self):
# Reset start to 0 when unfilter is applied.
self._google_url.update(start=0)
self._google_url.set_queries(filter=0)
self.fetch_and_display()
def copy_url(self, idx):
try:
try:
content = self._urltable[idx].encode('utf-8')
except KeyError:
printerr('Invalid index.')
return
# try copying the url to clipboard using native utilities
copier_params = []
if sys.platform.startswith(('linux', 'freebsd', 'openbsd')):
if shutil.which('xsel') is not None:
copier_params = ['xsel', '-b', '-i']
elif shutil.which('xclip') is not None:
copier_params = ['xclip', '-selection', 'clipboard']
elif shutil.which('termux-clipboard-set') is not None:
copier_params = ['termux-clipboard-set']
elif sys.platform == 'darwin':
copier_params = ['pbcopy']
elif sys.platform == 'win32':
copier_params = ['clip']
if copier_params:
Popen(copier_params, stdin=PIPE, stdout=DEVNULL, stderr=DEVNULL).communicate(content)
return
# If native clipboard utilities are absent, try to use terminal multiplexers
# tmux
if os.getenv('TMUX_PANE'):
copier_params = ['tmux', 'set-buffer']
Popen(copier_params + [content], stdin=DEVNULL, stdout=DEVNULL, stderr=DEVNULL).communicate()
return
# GNU Screen paste buffer
if os.getenv('STY'):
import tempfile
copier_params = ['screen', '-X', 'readbuf', '-e', 'utf8']
tmpfd, tmppath = tempfile.mkstemp()
try:
with os.fdopen(tmpfd, 'wb') as fp:
fp.write(content)
copier_params.append(tmppath)
Popen(copier_params, stdin=DEVNULL, stdout=DEVNULL, stderr=DEVNULL).communicate()
finally:
os.unlink(tmppath)
return
printerr('failed to locate suitable clipboard utility')
except Exception:
raise NoKeywordsException
def cmdloop(self):
"""Run REPL."""
if self.keywords:
self.fetch_and_display()
else:
printerr('Please initiate a query.')
while True:
self.read_next_command()
# TODO: Automatic dispatcher
#
# We can't write a dispatcher for now because that could
# change behaviour of the prompt. However, we have already
# laid a lot of ground work for the dispatcher, e.g., the
# `no_argument' decorator.
try:
cmd = self.cmd
if cmd == 'f':
self.do_first('')
elif cmd.startswith('g '):
self.do_google(cmd[2:])
elif cmd == 'n':
self.do_next('')
elif cmd == 'o':
self.do_open()
elif cmd.startswith('o '):
self.do_open(*cmd[2:].split())
elif cmd.startswith('O '):
open_url.override_text_browser = True
self.do_open(*cmd[2:].split())
open_url.override_text_browser = False
elif cmd == 'p':
self.do_previous('')
elif cmd == 'q':
break
elif cmd == 'x':
self.do_exact('')
elif cmd == 'unfilter':
self.do_unfilter('')
elif cmd == '?':
self.help()
elif cmd in self._urltable:
open_url(self._urltable[cmd])
elif self.keywords and cmd.isdigit() and int(cmd) < 100:
printerr('Index out of bound. To search for the number, use g.')
elif cmd == 'u':
Result.urlexpand = not Result.urlexpand
self.display_results()
elif cmd.startswith('c ') and self.re_url_index.match(cmd[2:]):
self.copy_url(cmd[2:])
else:
self.do_google(cmd)
except NoKeywordsException:
printerr('Initiate a query first.')
class GooglerArgumentParser(argparse.ArgumentParser):
"""Custom argument parser for googler."""
# Print omniprompt help
@staticmethod
def print_omniprompt_help(file=None):
file = sys.stderr if file is None else file
file.write(textwrap.dedent("""
omniprompt keys:
n, p fetch the next or previous set of search results
index open the result corresponding to index in browser
f jump to the first page
o [index|range|a ...] open space-separated result indices, numeric ranges
(sitelinks unsupported in ranges), or all, in browser
open the current search in browser, if no arguments
O [index|range|a ...] like key 'o', but try to open in a GUI browser
g keywords new Google search for 'keywords' with original options
should be used to search omniprompt keys and indices
c index copy url to clipboard
u toggle url expansion
q, ^D, double Enter exit googler
? show omniprompt help
* other inputs issue a new search with original options
"""))
# Print information on googler
@staticmethod
def print_general_info(file=None):
file = sys.stderr if file is None else file
file.write(textwrap.dedent("""
Version %s
Copyright © 2008 Henri Hakkinen
Copyright © 2015-2019 Arun Prakash Jana <[email protected]>
Zhiming Wang <[email protected]>
License: GPLv3
Webpage: https://github.com/jarun/googler
""" % _VERSION_))
# Augment print_help to print more than synopsis and options
def print_help(self, file=None):
super().print_help(file)
self.print_omniprompt_help(file)
self.print_general_info(file)
# Automatically print full help text on error
def error(self, message):
sys.stderr.write('%s: error: %s\n\n' % (self.prog, message))
self.print_help(sys.stderr)
self.exit(2)
# Type guards
@staticmethod
def positive_int(arg):
"""Try to convert a string into a positive integer."""
try:
n = int(arg)
assert n > 0
return n
except (ValueError, AssertionError):
raise argparse.ArgumentTypeError('%s is not a positive integer' % arg)
@staticmethod
def nonnegative_int(arg):
"""Try to convert a string into a nonnegative integer."""
try:
n = int(arg)
assert n >= 0
return n
except (ValueError, AssertionError):
raise argparse.ArgumentTypeError('%s is not a non-negative integer' % arg)
@staticmethod
def is_duration(arg):
"""Check if a string is a valid duration accepted by Google.
A valid duration is of the form dNUM, where d is a single letter h
(hour), d (day), w (week), m (month), or y (year), and NUM is a
non-negative integer.
"""
try:
if arg[0] not in ('h', 'd', 'w', 'm', 'y') or int(arg[1:]) < 0:
raise ValueError
except (TypeError, IndexError, ValueError):
raise argparse.ArgumentTypeError('%s is not a valid duration' % arg)
return arg
@staticmethod
def is_colorstr(arg):
"""Check if a string is a valid color string."""
try:
assert len(arg) == 6
for c in arg:
assert c in COLORMAP
except AssertionError:
raise argparse.ArgumentTypeError('%s is not a valid color string' % arg)
return arg
# Self-upgrade mechanism
def system_is_windows():
"""Checks if the underlying system is Windows (Cygwin included)."""
return sys.platform in {'win32', 'cygwin'}
def download_latest_googler(include_git=False):
"""Download latest googler to a temp file.
By default, the latest released version is downloaded, but if
`include_git` is specified, then the latest git master is downloaded
instead.
Parameters
----------
include_git : bool, optional
Download from git master. Default is False.
Returns
-------
(git_ref, path): tuple
A tuple containing the git reference (either name of the latest
tag or SHA of the latest commit) and path to the downloaded
file.
"""
import urllib.request
if include_git:
# Get SHA of latest commit on master
request = urllib.request.Request('%s/commits/master' % API_REPO_BASE,
headers={'Accept': 'application/vnd.github.v3.sha'})
response = urllib.request.urlopen(request)
if response.status != 200:
raise http.client.HTTPException(response.reason)
git_ref = response.read().decode('utf-8')
else:
# Get name of latest tag
request = urllib.request.Request('%s/releases?per_page=1' % API_REPO_BASE,
headers={'Accept': 'application/vnd.github.v3+json'})
response = urllib.request.urlopen(request)
if response.status != 200:
raise http.client.HTTPException(response.reason)
import json
git_ref = json.loads(response.read().decode('utf-8'))[0]['tag_name']
# Download googler to a tempfile
googler_download_url = '%s/%s/googler' % (RAW_DOWNLOAD_REPO_BASE, git_ref)
printerr('Downloading %s' % googler_download_url)
request = urllib.request.Request(googler_download_url,
headers={'Accept-Encoding': 'gzip'})
import tempfile
fd, path = tempfile.mkstemp()
atexit.register(lambda: os.remove(path) if os.path.exists(path) else None)
os.close(fd)
with open(path, 'wb') as fp:
with urllib.request.urlopen(request) as response:
if response.status != 200:
raise http.client.HTTPException(response.reason)
payload = response.read()
try:
fp.write(gzip.decompress(payload))
except OSError:
fp.write(payload)
return git_ref, path
def self_replace(path):
"""Replace the current script with a specified file.
Both paths (the specified path and path to the current script) are
resolved to absolute, symlink-free paths. Upon replacement, the
owner and mode signatures of the current script are preserved. The
caller needs to have the necessary permissions.
Replacement won't happen if the specified file is the same
(content-wise) as the current script.
Parameters
----------
path : str
Path to the replacement file.
Returns
-------
bool
True if replaced, False if skipped (specified file is the same
as the current script).
"""
if system_is_windows():
raise NotImplementedError('Self upgrade not supported on Windows.')
import filecmp
import shutil
path = os.path.realpath(path)
self_path = os.path.realpath(__file__)
if filecmp.cmp(path, self_path):
return False
self_stat = os.stat(self_path)
os.chown(path, self_stat.st_uid, self_stat.st_gid)
os.chmod(path, self_stat.st_mode)
shutil.move(path, self_path)
return True
def self_upgrade(include_git=False):
"""Perform in-place self-upgrade.
Parameters
----------
include_git : bool, optional
See `download_latest_googler`. Default is False.
"""
git_ref, path = download_latest_googler(include_git=include_git)
if self_replace(path):
printerr('Upgraded to %s.' % git_ref)
else:
printerr('Already up to date.')
# Miscellaneous functions
def python_version():
return '%d.%d.%d' % sys.version_info[:3]
def https_proxy_from_environment():
return os.getenv('https_proxy')
def parse_proxy_spec(proxyspec):
if '://' in proxyspec:
pos = proxyspec.find('://')
scheme = proxyspec[:pos]
proxyspec = proxyspec[pos+3:]
if scheme.lower() != 'http':
# Only support HTTP proxies.
#
# In particular, we don't support HTTPS proxies since we
# only speak plain HTTP to the proxy server, so don't give
# users a false sense of security.
raise NotImplementedError('Unsupported proxy scheme %s.' % scheme)
if '@' in proxyspec:
pos = proxyspec.find('@')
user_passwd = urllib.parse.unquote(proxyspec[:pos])
# Remove trailing '/' if any
host_port = proxyspec[pos+1:].rstrip('/')
else:
user_passwd = None
host_port = proxyspec.rstrip('/')
if ':' not in host_port:
# Use port 1080 as default, following curl.
host_port += ':1080'
return user_passwd, host_port
def set_win_console_mode():
# VT100 control sequences are supported on Windows 10 Anniversary Update and later.
# https://docs.microsoft.com/en-us/windows/console/console-virtual-terminal-sequences
# https://docs.microsoft.com/en-us/windows/console/setconsolemode
if platform.release() == '10':
STD_OUTPUT_HANDLE = -11
STD_ERROR_HANDLE = -12
ENABLE_VIRTUAL_TERMINAL_PROCESSING = 0x0004
try:
from ctypes import windll, wintypes, byref
kernel32 = windll.kernel32
for nhandle in (STD_OUTPUT_HANDLE, STD_ERROR_HANDLE):
handle = kernel32.GetStdHandle(nhandle)
old_mode = wintypes.DWORD()
if not kernel32.GetConsoleMode(handle, byref(old_mode)):
raise RuntimeError('GetConsoleMode failed')
new_mode = old_mode.value | ENABLE_VIRTUAL_TERMINAL_PROCESSING
if not kernel32.SetConsoleMode(handle, new_mode):
raise RuntimeError('SetConsoleMode failed')
# Note: No need to restore at exit. SetConsoleMode seems to
# be limited to the calling process.
except Exception:
pass
# Query autocompleter
# This function is largely experimental and could raise any exception;
# you should be prepared to catch anything. When it works though, it
# returns a list of strings the prefix could autocomplete to (however,
# it is not guaranteed that they start with the specified prefix; for
# instance, they won't if the specified prefix ends in a punctuation
# mark.)
def completer_fetch_completions(prefix):
import html
import json
import re
import urllib.request
# One can pass the 'hl' query param to specify the language. We
# ignore that for now.
api_url = ('https://www.google.com/complete/search?client=psy-ab&q=%s' %
urllib.parse.quote(prefix, safe=''))
# A timeout of 3 seconds seems to be overly generous already.
resp = urllib.request.urlopen(api_url, timeout=3)
charset = resp.headers.get_content_charset()
logger.debug('Completions charset: %s', charset)
respobj = json.loads(resp.read().decode(charset))
# The response object, once parsed as JSON, should look like
#
# ['git',
# [['git<b>hub</b>', 0],
# ['git', 0],
# ['git<b>lab</b>', 0],
# ['git<b> stash</b>', 0]],
# {'q': 'oooAhRzoChqNmMbNaaDKXk1YY4k', 't': {'bpc': False, 'tlw': False}}]
#
# Note the each result entry need not have two members; e.g., for
# 'gi', there is an entry ['gi<b>f</b>', 0, [131]].
HTML_TAG = re.compile(r'<[^>]+>')
return [html.unescape(HTML_TAG.sub('', entry[0])) for entry in respobj[1]]
def completer_run(prefix):
if prefix:
completions = completer_fetch_completions(prefix)
if completions:
print('\n'.join(completions))
sys.exit(0)
def parse_args(args=None, namespace=None):
"""Parse googler arguments/options.
Parameters
----------
args : list, optional
Arguments to parse. Default is ``sys.argv``.
namespace : argparse.Namespace
Namespace to write to. Default is a new namespace.
Returns
-------
argparse.Namespace
Namespace with parsed arguments / options.
"""
colorstr_env = os.getenv('GOOGLER_COLORS')
argparser = GooglerArgumentParser(description='Google from the command-line.')
addarg = argparser.add_argument
addarg('-s', '--start', type=argparser.nonnegative_int, default=0,
metavar='N', help='start at the Nth result')
addarg('-n', '--count', dest='num', type=argparser.positive_int,
default=10, metavar='N', help='show N results (default 10)')
addarg('-N', '--news', action='store_true',
help='show results from news section')
addarg('-c', '--tld', metavar='TLD',
help="""country-specific search with top-level domain .TLD, e.g., 'in'
for India""")
addarg('-l', '--lang', metavar='LANG', help='display in language LANG')
addarg('-x', '--exact', action='store_true',
help='disable automatic spelling correction')
addarg('--colorize', nargs='?', choices=['auto', 'always', 'never'],
const='always', default='auto',
help="""whether to colorize output; defaults to 'auto', which enables
color when stdout is a tty device; using --colorize without an argument
is equivalent to --colorize=always""")
addarg('-C', '--nocolor', action='store_true',
help='equivalent to --colorize=never')
addarg('--colors', dest='colorstr', type=argparser.is_colorstr,
default=colorstr_env if colorstr_env else 'GKlgxy', metavar='COLORS',
help='set output colors (see man page for details)')
addarg('--nohl', action='store_true', help='do not highlight keyword matches in abstract')
addarg('-j', '--first', '--lucky', dest='lucky', action='store_true',
help='open the first result in web browser and exit')
addarg('-t', '--time', dest='duration', type=argparser.is_duration,
metavar='dN', help='time limit search '
'[h5 (5 hrs), d5 (5 days), w5 (5 weeks), m5 (5 months), y5 (5 years)]')
addarg('-w', '--site', dest='sites', action='append', metavar='SITE',
help='search a site using Google')
addarg('--unfilter', action='store_true', help='do not omit similar results')
addarg('-p', '--proxy', default=https_proxy_from_environment(),
help="""tunnel traffic through an HTTP proxy;
PROXY is of the form [http://][user:password@]proxyhost[:port]""")
addarg('--noua', action='store_true', help='legacy option (no effect)')
addarg('--notweak', action='store_true',
help='disable TCP optimizations and forced TLS 1.2')
addarg('--json', action='store_true',
help='output in JSON format; implies --noprompt')
addarg('--url-handler', metavar='UTIL',
help='custom script or cli utility to open results')
addarg('--show-browser-logs', action='store_true',
help='do not suppress browser output (stdout and stderr)')
addarg('--np', '--noprompt', dest='noninteractive', action='store_true',
help='search and exit, do not prompt')
addarg('keywords', nargs='*', metavar='KEYWORD', help='search keywords')
if ENABLE_SELF_UPGRADE_MECHANISM and not system_is_windows():
addarg('-u', '--upgrade', action='store_true',
help='perform in-place self-upgrade')
addarg('--include-git', action='store_true',
help='when used with --upgrade, get latest git master')
addarg('-v', '--version', action='version', version=_VERSION_)
addarg('-d', '--debug', action='store_true', help='enable debugging')
# Hidden option for interacting with DOM in an IPython/pdb shell
addarg('-D', '--debugger', action='store_true', help=argparse.SUPPRESS)
addarg('--complete', help=argparse.SUPPRESS)
parsed = argparser.parse_args(args, namespace)
if parsed.nocolor:
parsed.colorize = 'never'
return parsed
def main():
try:
opts = parse_args()
# Set logging level
if opts.debug:
logger.setLevel(logging.DEBUG)
logger.debug('googler version %s', _VERSION_)
logger.debug('Python version %s', python_version())
if opts.debugger:
global debugger
debugger = True
# Handle query completer
if opts.complete is not None:
completer_run(opts.complete)
# Handle self-upgrade
if hasattr(opts, 'upgrade') and opts.upgrade:
self_upgrade(include_git=opts.include_git)
sys.exit(0)
check_stdout_encoding()
if opts.keywords:
try:
# Add cmdline args to readline history
readline.add_history(' '.join(opts.keywords))
except Exception:
pass
# Set colors
if opts.colorize == 'always':
colorize = True
elif opts.colorize == 'auto':
colorize = sys.stdout.isatty()
else: # opts.colorize == 'never'
colorize = False
if colorize:
colors = Colors(*[COLORMAP[c] for c in opts.colorstr], reset=COLORMAP['x'])
else:
colors = None
Result.colors = colors
Result.nohl = opts.nohl
Result.urlexpand = True if os.getenv('DISABLE_URL_EXPANSION') is None else False
GooglerCmd.colors = colors
# Try to enable ANSI color support in cmd or PowerShell on Windows 10
if sys.platform == 'win32' and sys.stdout.isatty() and colorize:
set_win_console_mode()
if opts.url_handler is not None:
open_url.url_handler = opts.url_handler
else:
# Set text browser override to False
open_url.override_text_browser = False
# Handle browser output suppression
if opts.show_browser_logs or (os.getenv('BROWSER') in text_browsers):
open_url.suppress_browser_output = False
else:
open_url.suppress_browser_output = True
if opts.noua:
logger.warning('--noua option has been deprecated and has no effect (see #284)')
repl = GooglerCmd(opts)
if opts.json or opts.lucky or opts.noninteractive:
# Non-interactive mode
repl.fetch()
if opts.lucky:
if repl.results:
open_url(repl.results[0].url)
else:
print('No results.', file=sys.stderr)
else:
repl.showing_results_for_alert(interactive=False)
repl.display_results(json_output=opts.json)
sys.exit(0)
else:
# Interactive mode
repl.cmdloop()
except Exception as e:
# With debugging on, let the exception through for a traceback;
# otherwise, only print the exception error message.
if logger.isEnabledFor(logging.DEBUG):
raise
else:
logger.error(e)
sys.exit(1)
if __name__ == '__main__':
main()
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