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__init__.py
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__init__.py
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from uuid import uuid4
import requests
from bs4 import BeautifulSoup
from lxml import etree
from json import loads
from .Exceptions import NoSuchElementException
class WebElement(object):
"""
The Requests WebElement behaves very much like a selenium WebElement
except that it does not provide any methods for interaction like
clicking and sending keys. DOM Traversal and data extraction
methods are provided, and attributes like WebElement.text
are available.
"""
def __init__(self, soup, response, url, parent=None):
self.soup = None
self.make_soup(soup, response)
self.tag_name = self.soup.name if self.soup is not None else None
self.text = self.soup.text if self.soup is not None else None
try:
self.content = self.soup.content if self.soup is not None else None
except AttributeError:
self.content = None
self.current_response = response
self.current_url = url
self.size = 0, 0
self.location = 0, 0
self.rect = 0, 0
self.screenshot_as_png = None
self.screenshot_as_base64 = None
self.parent = parent
self.location_once_scrolled_into_view = 0, 0
self.id = uuid4()
def __getitem__(self, item):
return self.soup[item]
def make_soup(self, soup, response):
if soup is None:
if response is not None:
soup = BeautifulSoup(response, 'html.parser')
tag = None
for thing in soup.children:
tag = getattr(soup, thing.name)
# If we don't have a valid tag object, then continue looking.
if not tag or tag is None:
continue
break
self.soup = tag
else:
self.soup = soup
return self
def get_attribute(self, attribute, **kwargs):
return self.soup[attribute]
def value_of_css_property(self, name):
return None
def find_element_by_id(self, element_id):
"""
Find an element in the DOM by id.
Args:
element_id:
Returns:
WebElement
"""
ele = self.soup.find(id=element_id)
if ele is None:
raise NoSuchElementException('The element could not be located by id: {}'.format(element_id))
return WebElement(ele, self.current_response, self.current_url, parent=self.id)
def find_element_by_name(self, name):
"""
Find an element in the DOM by name.
Args:
name:
Returns:
WebElement
"""
ele = self.soup.find(attrs={'name': name})
if ele is None:
raise NoSuchElementException('The element could not be located by name: {}'.format(name))
return WebElement(ele, self.current_response, self.current_url, parent=self.id)
def find_element_by_class_name(self, class_name):
"""
Find an element in the DOM by class name.
Args:
class_name:
Returns:
WebElement
"""
ele = self.soup.find(attrs={'class': class_name})
if ele is None:
raise NoSuchElementException('The element could not be located by class name: {}'.format(class_name))
return WebElement(ele, self.current_response, self.current_url, parent=self.id)
def find_element_by_tag_name(self, tag_name):
"""
Find an element by tag name.
Args:
tag_name:
Returns:
WebElement
"""
ele = self.soup.find(tag_name)
if ele is None:
raise NoSuchElementException('The element could not be located by tag name: {}'.format(tag_name))
return WebElement(ele, self.current_response, self.current_url, parent=self.id)
def find_element_by_css_selector(self, selector):
"""
Find an element in the DOM by css selector.
Args:
selector:
Returns:
WebElement
"""
ele = self.soup.select(selector)[0]
if ele is None:
raise NoSuchElementException('The element could not be located by css selector: {}'.format(selector))
return WebElement(ele, self.current_response, self.current_url, parent=self.id)
def find_element_by_xpath(self, xpath):
"""
Find an element in the DOM by xpath.
Args:
xpath:
Returns:
WebElement
"""
tree = etree.fromstring(self.current_response, etree.HTMLParser())
element = tree.xpath(xpath)[0]
self.current_response = etree.tostring(element)
# print(self.current_response)
return WebElement(None, self.current_response, self.current_url, parent=self.id)
# %%%%%%%%%%%%%%%%%%% Find elements %%%%%%%%%%%%%%%%%%% #
def find_elements_by_id(self, element_id):
"""
Find all elements in the DOM matching the given id.
Args:
element_id:
Returns:
list
"""
resp = self.current_response
url = self.current_url
return [WebElement(element, resp, url, parent=self.id) for element in self.soup.find_all(id=element_id)]
def find_elements_by_name(self, name):
"""
Find all elements in the DOM matching the given name.
Args:
name:
Returns:
list
"""
resp = self.current_response
url = self.current_url
return [WebElement(element, resp, url, parent=self.id) for element in self.soup.find_all(attrs={'name': name})]
def find_elements_by_class_name(self, name):
"""
Find all elements in the DOM matching the given class name.
Args:
name:
Returns:
list
"""
resp = self.current_response
url = self.current_url
return [WebElement(element, resp, url, parent=self.id) for element in self.soup.find_all(attrs={'class': name})]
def find_elements_by_tag_name(self, name):
"""
Find all elements in the DOM matching the given tag name.
Args:
name:
Returns:
list
"""
resp = self.current_response
url = self.current_url
return [WebElement(element, resp, url, parent=self.id) for element in self.soup.find_all(name)]
def find_elements_by_css_selector(self, selector):
"""
Find all elements in the DOM matching the given css selector.
Args:
selector:
Returns:
list
"""
resp = self.current_response
url = self.current_url
return [WebElement(element, resp, url, parent=self.id) for element in self.soup.select(selector)]
def find_elements_by_xpath(self, xpath):
"""
Find all elements in the DOM matching the given xpath.
Args:
xpath:
Returns:
list
"""
tree = etree.fromstring(self.current_response, etree.HTMLParser())
elements = tree.xpath(xpath)
output_elements = []
for element in elements:
resp = etree.tostring(element)
output_elements.append(WebElement(None, resp, self.current_url, parent=self.id))
return output_elements
class WebHistory(object):
def __init__(self):
self.index = -1
self.history = []
def __getitem__(self, item):
return self.history[item]
def current_url(self):
"""
Get the current index's url.
Returns:
str
"""
return self.history[self.index]
def register(self, url):
"""
Register a url with the history list.
Args:
url:
str
Returns:
self
"""
self.history.append(url)
self.index += 1
return self
def back(self):
"""
Move the pointer back in the history and return the url for that new index.
Returns:
str
"""
self.index -= 1
return self.history[self.index]
def forward(self):
"""
Move the pointer forward in the history and return the url for that new index.
Returns:
str
"""
self.index += 1
return self.history[self.index]
class WebReader(WebElement):
def __init__(self):
self.soup = None
self.current_response = None
self.current_url = None
self.requests = requests
self.web_history = WebHistory()
self.size = 0, 0
self.location = 0, 0
self.rect = 0, 0
self.screenshot_as_png = None
self.screenshot_as_base64 = None
self.location_once_scrolled_into_view = 0, 0
self.id = uuid4()
super(WebReader, self).__init__(None, None, None)
def back(self):
"""
Navigate to the last place in the web history.
Returns:
self
"""
self.get(self.web_history.back())
return self
def close(self):
"""
Does nothing. Is just a placeholder method.
Returns:
self
"""
return self
def forward(self):
"""
Navigate to the next place in the web history.
Returns:
self
"""
self.get(self.web_history.forward())
return self
def get(self, url, headers=None, add_to_history=True, cookies=None):
"""
Get a response for the given url.
Args:
url:
headers:
add_to_history:
cookies:
Returns:
str
"""
if add_to_history:
self.web_history.register(url)
self.current_url = url
if headers is None:
headers = {}
self.current_response = self.requests.get(
url,
headers=headers,
cookies=cookies if cookies else {}
).text.strip()
# Check for json response and if so, then return a dictionary
# and set the current response to the dictionary.
if self.current_response[0] == '{':
if hasattr(self.current_response, 'json'):
self.current_response = self.current_response.json()
self.current_response = loads(self.current_response)
self.soup = None
return self.current_response
# Make soup
self.soup = BeautifulSoup(self.current_response, 'html.parser')
return self.current_response
def quit(self):
"""
Does nothing. Is just a placeholder method.
Returns:
self
"""
return self
def refresh(self):
"""
Grab the current_url again.
Returns:
self
"""
self.get(self.web_history.current_url(), add_to_history=False)
return self