def scrape_page(self, url, selector, **kwargs):
"""
Perform a page scrape and return the results (useful for previewing a web_input modular input configuration)
"""
result = {}
# Run the input
try:
web_input = WebInput(timeout=10)
# Get the authentication information, if available
username = None
password = None
if( 'password' in kwargs and 'username' in kwargs):
username = kwargs['username']
password = kwargs['password']
# Get the user-agent string
user_agent = None
if( 'user_agent' in kwargs):
user_agent = kwargs['user_agent']
# Determine if we should include empty matches
include_empty_matches = False
if 'include_empty_matches' in kwargs:
include_empty_matches = util.normalizeBoolean(kwargs['include_empty_matches'], True)
# Get the proxy configuration
conf_stanza = "default"
try:
proxy_type, proxy_server, proxy_port, proxy_user, proxy_password = web_input.get_proxy_config(cherrypy.session.get('sessionKey'), conf_stanza)
except splunk.ResourceNotFound:
cherrypy.response.status = 202
return self.render_error_json(_("Proxy server information could not be obtained"))
# Scrape the page
result = WebInput.scrape_page( url, selector, username=username, password=password, include_empty_matches=include_empty_matches, proxy_type=proxy_type, proxy_server=proxy_server, proxy_port=proxy_port, proxy_user=proxy_user, proxy_password=proxy_password, user_agent=user_agent)
except FieldValidationException, e:
cherrypy.response.status = 202
return self.render_error_json(_(str(e)))
def test_browser(self, browser, **kwargs):
"""
Determine if the given browser is configured and able to be used.
"""
success = None
web_scraper = WebScraper(3)
# Set the proxy authentication
try:
web_input = WebInput(timeout=10)
proxy_type, proxy_server, proxy_port, proxy_user, proxy_password = web_input.get_proxy_config(
cherrypy.session.get('sessionKey'), "default")
web_scraper.set_proxy(proxy_type, proxy_server, proxy_port,
proxy_user, proxy_password)
except splunk.ResourceNotFound:
cherrypy.response.status = 202
return self.render_error_json(
_("Proxy server information could not be obtained"))
try:
result = web_scraper.scrape_page(
selector="a",
url=WebInputController.TEST_BROWSER_URL,
browser=browser,
include_raw_content=True)
if not result:
success = False
elif len(result) < 1:
success = False
elif 'browser' not in result[0]:
success = True
else:
success = (result[0]['browser'] == browser)
except Exception as exception:
logger.exception(
"Exception generated when attempting to test the browser")
success = False
return self.render_json({'success': success})
def get_login_fields(self, url=None, **kwargs):
web_input = WebInput(timeout=10)
proxy_type, proxy_server, proxy_port, proxy_user, proxy_password = \
web_input.get_proxy_config(cherrypy.session.get('sessionKey'), "default")
client = MechanizeClient(5)
logger.debug("Using proxy %s to detect form fields", proxy_server)
user_agent = kwargs.get('user_agent')
_, username_field, password_field = client.detectFormFields(url, proxy_type, proxy_server, proxy_port, proxy_user, proxy_password, user_agent)
return self.render_json({
'username_field' : username_field or "",
'password_field' : password_field or ""
})
def get_get_login_fields(self, request_info, url=None, **kwargs):
web_input = WebInput(timeout=10)
proxy_type, proxy_server, proxy_port, proxy_user, proxy_password = \
web_input.get_proxy_config(request_info.session_key, "default")
client = MechanizeClient(5)
logger.debug("Using proxy %s to detect form fields", proxy_server)
user_agent = kwargs.get('user_agent')
_, username_field, password_field = client.detectFormFields(
url, proxy_type, proxy_server, proxy_port, proxy_user,
proxy_password, user_agent)
return self.render_json({
'username_field': username_field or "",
'password_field': password_field or ""
})
def test_browser(self, browser, **kwargs):
"""
Determine if the given browser is configured and able to be used.
"""
success = None
web_scraper = WebScraper(3)
# Set the proxy authentication
try:
web_input = WebInput(timeout=10)
proxy_type, proxy_server, proxy_port, proxy_user, proxy_password = web_input.get_proxy_config(cherrypy.session.get('sessionKey'), "default")
web_scraper.set_proxy(proxy_type, proxy_server, proxy_port, proxy_user, proxy_password)
except splunk.ResourceNotFound:
cherrypy.response.status = 202
return self.render_error_json(_("Proxy server information could not be obtained"))
try:
result = web_scraper.scrape_page(selector="a", url=WebInputController.TEST_BROWSER_URL,
browser=browser, include_raw_content=True)
if not result:
success = False
elif len(result) < 1:
success = False
else:
success = (result[0]['browser'] == browser)
except Exception as exception:
logger.exception("Exception generated when attempting to test the browser")
success = False
return self.render_json({
'success' : success
})
def get_scrape_page(self, request_info, **kwargs):
"""
Perform a page scrape and return the results (useful for previewing a web_input modular
input configuration)
"""
result = [{}]
# Run the input
try:
web_input = WebInput(timeout=10)
kw = {}
# Get the URL or URI
url = None
if 'url' in kwargs:
url = kwargs['url']
elif 'uri' in kwargs:
url = kwargs['uri']
if url is None:
return self.render_error_json("No URL was provided", 202)
# Get the selector
selector = None
if 'selector' in kwargs:
selector = kwargs['selector']
# Determine if we should include empty matches
if 'empty_matches' in kwargs:
kw['include_empty_matches'] = util.normalizeBoolean(
kwargs['empty_matches'], True)
# Get the use_element_name parameter
if 'use_element_name' in kwargs:
kw['use_element_name'] = util.normalizeBoolean(
kwargs['use_element_name'], False)
# Get the text_separator parameter
if 'text_separator' in kwargs:
kw['text_separator'] = kwargs['text_separator']
# Get the output_as_mv parameter. This parameter is different from the name of the
# argument that the class accepts and will be renamed accrdingly.
if 'output_as_mv' in kwargs:
kw['output_matches_as_mv'] = util.normalizeBoolean(
kwargs['output_as_mv'], True)
# If we are outputting as multi-valued parameters, then don't include the separate
# fields
if kw['output_matches_as_mv']:
kw['output_matches_as_separate_fields'] = False
else:
# http://lukemurphey.net/issues/1643
kw['output_matches_as_separate_fields'] = True
# Get the field match prefix
if 'match_prefix' in kwargs:
kw['match_prefix'] = kwargs['match_prefix']
# Get the browser parameter
if 'browser' in kwargs:
kw['browser'] = kwargs['browser']
# Get the page_limit parameter
if 'page_limit' in kwargs:
kw['page_limit'] = int(kwargs['page_limit'])
# Get the depth_limit parameter
if 'depth_limit' in kwargs:
kw['depth_limit'] = int(kwargs['depth_limit'])
# Get the depth_limit parameter
if 'url_filter' in kwargs:
kw['url_filter'] = kwargs['url_filter']
# Get the name_attributes parameter
if 'name_attributes' in kwargs:
kw['name_attributes'] = kwargs['name_attributes']
# Get the raw_content parameter
if 'raw_content' in kwargs:
kw['include_raw_content'] = util.normalizeBoolean(
kwargs['raw_content'])
# Only extract links using HTTPS if on Splunk Cloud
if ModularInput.is_on_cloud(request_info.session_key):
kw['https_only'] = True
# Otherwise, allow callers to specify which links to extract
elif 'https_only' in kwargs:
kw['https_only'] = util.normalizeBoolean(kwargs['https_only'])
# Get the proxy configuration
conf_stanza = "default"
# Get the timeout parameter
timeout = 5
if 'timeout' in kwargs:
try:
timeout = int(kwargs['timeout'])
except:
# The timeout is invalid. Ignore this for now, it will get picked up when
# the user attempts to save the input
pass
# Make the web scraper instance
web_scraper = WebScraper(timeout)
# Get the authentication information, if available
username = None
password = None
if 'password' in kwargs and 'username' in kwargs:
username = kwargs['username']
password = kwargs['password']
username_field = kwargs.get('username_field', None)
password_field = kwargs.get('password_field', None)
authentication_url = kwargs.get('authentication_url', None)
if authentication_url is not None:
authentication_url = urlparse(authentication_url)
logger.debug("Using credentials for scrape_page")
web_scraper.set_authentication(username, password,
authentication_url,
username_field, password_field)
# Get the user-agent string
if 'user_agent' in kwargs:
web_scraper.user_agent = kwargs['user_agent']
# Set the proxy authentication
try:
proxy_type, proxy_server, proxy_port, proxy_user, proxy_password = web_input.get_proxy_config(
request_info.session_key, conf_stanza)
web_scraper.set_proxy(proxy_type, proxy_server, proxy_port,
proxy_user, proxy_password)
except ResourceNotFound:
return self.render_error_json(
"Proxy server information could not be obtained", 202)
# Scrape the page
result = web_scraper.scrape_page(url, selector, **kw)
except FieldValidationException as e:
return self.render_error_json(str(e), 220)
except ServerNotFoundError as e:
return self.render_error_json(str(e), 220)
except (SelectorError, SelectorSyntaxError, ExpressionError):
return self.render_error_json("Selector is invalid. ", 220)
except LoginFormNotFound:
return self.render_error_json("Login form was not found", 220)
except FormAuthenticationFailed:
return self.render_error_json("Form authentication failed", 220)
except Exception as e:
logger.exception("Error generated during execution")
return self.render_error_json(str(e), 500)
# Return the information
if 'include_first_result_only' in kwargs:
return self.render_json(result[0])
else:
return self.render_json(result)
def get_load_page(self, request_info, url, **kwargs):
"""
Proxy a web-page through so that a UI can be displayed for showing potential results.
"""
web_client = None
try:
# --------------------------------------
# 1: Make sure that user has permission to make inputs. We don't want to allow people
# to use this as a general proxy.
# --------------------------------------
if not WebInputOperationsHandler.hasCapability(
'edit_modinput_web_input'
) and WebInputOperationsHandler.hasCapability('admin_all_objects'):
return self.render_error_html(
'You need the "edit_modinput_web_input" capability ' +
'to make website inputs', 403)
# Don't allow proxying of the javascript files
if url.endswith(".js"):
return {
'payload': '',
'status': 200,
'headers': {
'Content-Type': 'application/javascript'
},
}
# --------------------------------------
# 2: Only allow HTTPS if the install is on Splunk Cloud
# --------------------------------------
if ModularInput.is_on_cloud(request_info.session_key
) and not url.startswith("https://"):
return self.render_error_html(
'URLs on Splunk Cloud must use HTTPS protocol',
401) # TODO: deterine best code
# --------------------------------------
# 3: Perform a request for the page
# --------------------------------------
# Get the proxy configuration
conf_stanza = "default"
try:
web_input = WebInput(timeout=10)
proxy_type, proxy_server, proxy_port, proxy_user, proxy_password = \
web_input.get_proxy_config(request_info.session_key, conf_stanza)
except ResourceNotFound:
return self.render_error_html(
"Proxy server information could not be obtained", 202)
# Get the timeout to use
timeout = None
if 'timeout' in kwargs:
try:
timeout = int(kwargs['timeout'])
except ValueError:
timeout = 15
else:
timeout = 15
# Get the user-agent
user_agent = kwargs.get('user_agent', None)
# Get the information on the browser to use
browser = None
if 'browser' in kwargs:
browser = kwargs['browser']
# Make the client
if browser is None or browser == WebScraper.INTEGRATED_CLIENT:
web_client = DefaultWebClient(timeout, user_agent, logger)
elif browser == WebScraper.FIREFOX:
web_client = FirefoxClient(timeout, user_agent, logger)
elif browser == WebScraper.CHROME:
web_client = ChromeClient(timeout, user_agent, logger)
web_client.setProxy(proxy_type, proxy_server, proxy_port,
proxy_user, proxy_password)
# Get the username and password
username = kwargs.get('username', None)
password = kwargs.get('password', None)
username_field = kwargs.get('username_field', None)
password_field = kwargs.get('password_field', None)
authentication_url = kwargs.get('authentication_url', None)
if username is not None and password is not None:
username = kwargs['username']
password = kwargs['password']
username_field = kwargs.get('username_field', None)
password_field = kwargs.get('password_field', None)
authentication_url = kwargs.get('authentication_url', None)
web_client.setCredentials(username, password)
if authentication_url is not None:
logger.debug(
"Authenticating using form login in scrape_page")
web_client.doFormLogin(authentication_url, username_field,
password_field)
# Get the page
try:
content = web_client.get_url(url, 'GET')
response = web_client.get_response_headers()
except:
logger.exception(
"Exception generated while attempting to content for url=%s",
url)
return self.render_error_html(
"Page preview could not be obtained using a web-browser",
500)
# --------------------------------------
# 4: Render the content with the browser if necessary
# --------------------------------------
"""
if 'text/html' in response['content-type']:
# Get the information on the browser to use
browser = None
if 'browser' in kwargs:
browser = kwargs['browser']
# Try rendering the content using a web-browser
try:
if browser is not None and browser != WebScraper.INTEGRATED_CLIENT:
web_scraper = WebScraper(timeout=timeout)
web_scraper.set_proxy(proxy_type, proxy_server, proxy_port, proxy_user, proxy_password)
web_scraper.set_authentication(username, password)
content = web_scraper.get_result_browser(urlparse(url), browser)
except:
logger.exception("Exception generated while attempting to get browser rendering or url=%s", url)
cherrypy.response.status = 500
return self.render_error_html("Page preview could not be obtained using a web-browser")
"""
# --------------------------------------
# 5: Rewrite the links in HTML files so that they also point to the internal proxy
# --------------------------------------
if "<html" in content:
# Parse the content
html = lxml.html.document_fromstring(content)
# Rewrite the links to point to this internal proxy
rewrite_using_internal_proxy = True
if rewrite_using_internal_proxy:
def relocate_href(link):
"""
Change the hrefs such that they go through the proxy.
"""
link = urljoin(url, link)
if link.endswith(".js"):
return ""
if not link.endswith(".css"):
return "load_page?url=" + link
else:
return link
html.rewrite_links(relocate_href)
# Block the href links
for element, attribute, _, _ in html.iterlinks():
if element.tag == "a" and attribute == "href":
element.set('href', "#")
elif element.tag == "form" and attribute == "action":
element.set('action', "?")
else:
html.make_links_absolute(url)
# Determine if we should clean the JS
clean_script = True
if 'clean_script' in kwargs:
clean_script = util.normalizeBoolean(
kwargs['clean_script'])
# Determine if we should clean the CSS
clean_styles = False
if 'clean_styles' in kwargs:
clean_styles = util.normalizeBoolean(
kwargs['clean_styles'])
# Clean up the HTML
if clean_styles or clean_script:
kill_tags = []
if clean_script:
kill_tags = ["script"]
# Remove the script blocks
cleaner = Cleaner(page_structure=False,
kill_tags=kill_tags,
javascript=False,
links=False,
style=clean_styles,
safe_attrs_only=False)
# Get the content
content = lxml.html.tostring(cleaner.clean_html(html),
encoding="unicode")
else:
content = lxml.html.tostring(html, encoding="unicode")
# --------------------------------------
# 6: Respond with the results
# --------------------------------------
headers = {}
if 'content-type' in response:
headers['Content-Type'] = response['content-type']
else:
headers['Content-Type'] = 'text/html'
# --------------------------------------
# 7: Clear Javascript files
# --------------------------------------
if response.get('content-type', "") == "application/javascript" \
or response.get('content-type', "") == "application/x-javascript" \
or response.get('content-type', "") == "text/javascript" \
or url.endswith(".js"):
return {'payload': '', 'headers': headers, 'status': 200}
return {'payload': content, 'headers': headers, 'status': 200}
except LoginFormNotFound:
logger.debug("Login form not found")
return self.render_error_html("Login form was not found", 200)
except FormAuthenticationFailed as e:
logger.debug("Form authentication failed: " + str(e))
return self.render_error_html(
"Form authentication failed: " + str(e), 200)
except:
logger.exception("Error when attempting to proxy an HTTP request")
return self.render_error_html("Page preview could not be created",
500)
finally:
if web_client:
web_client.close()
def scrape_page(self, **kwargs):
"""
Perform a page scrape and return the results (useful for previewing a web_input modular
input configuration)
"""
result = [{}]
# Run the input
try:
web_input = WebInput(timeout=10)
kw = {}
# Get the URL or URI
url = None
if 'url' in kwargs:
url = kwargs['url']
elif 'uri' in kwargs:
url = kwargs['uri']
if url is None:
cherrypy.response.status = 202
return self.render_error_json(_("No URL was provided"))
# Get the selector
selector = None
if 'selector' in kwargs:
selector = kwargs['selector']
# Determine if we should include empty matches
if 'empty_matches' in kwargs:
kw['include_empty_matches'] = util.normalizeBoolean(kwargs['empty_matches'], True)
# Get the use_element_name parameter
if 'use_element_name' in kwargs:
kw['use_element_name'] = util.normalizeBoolean(kwargs['use_element_name'], False)
# Get the text_separator parameter
if 'text_separator' in kwargs:
kw['text_separator'] = kwargs['text_separator']
# Get the output_as_mv parameter. This parameter is different from the name of the
# argument that the class accepts and will be renamed accrdingly.
if 'output_as_mv' in kwargs:
kw['output_matches_as_mv'] = util.normalizeBoolean(kwargs['output_as_mv'], True)
# If we are outputting as multi-valued parameters, then don't include the separate
# fields
if kw['output_matches_as_mv']:
kw['output_matches_as_separate_fields'] = False
else:
# http://lukemurphey.net/issues/1643
kw['output_matches_as_separate_fields'] = True
# Get the field match prefix
if 'match_prefix' in kwargs:
kw['match_prefix'] = kwargs['match_prefix']
# Get the browser parameter
if 'browser' in kwargs:
kw['browser'] = kwargs['browser']
# Get the page_limit parameter
if 'page_limit' in kwargs:
kw['page_limit'] = int(kwargs['page_limit'])
# Get the depth_limit parameter
if 'depth_limit' in kwargs:
kw['depth_limit'] = int(kwargs['depth_limit'])
# Get the depth_limit parameter
if 'url_filter' in kwargs:
kw['url_filter'] = kwargs['url_filter']
# Get the name_attributes parameter
if 'name_attributes' in kwargs:
kw['name_attributes'] = kwargs['name_attributes']
# Get the raw_content parameter
if 'raw_content' in kwargs:
kw['include_raw_content'] = util.normalizeBoolean(kwargs['raw_content'])
# Only extract links using HTTPS if on Splunk Cloud
if ModularInput.is_on_cloud(cherrypy.session.get('sessionKey')):
kw['https_only'] = True
# Otherwise, allow callers to specify which links to extract
elif 'https_only' in kwargs:
kw['https_only'] = util.normalizeBoolean(kwargs['https_only'])
# Get the proxy configuration
conf_stanza = "default"
# Get the timeout parameter
timeout = 5
if 'timeout' in kwargs:
try:
timeout = int(kwargs['timeout'])
except:
# The timeout is invalid. Ignore this for now, it will get picked up when
# the user attempts to save the input
pass
# Make the web scraper instance
web_scraper = WebScraper(timeout)
# Get the authentication information, if available
username = None
password = None
if 'password' in kwargs and 'username' in kwargs:
username = kwargs['username']
password = kwargs['password']
username_field = kwargs.get('username_field', None)
password_field = kwargs.get('password_field', None)
authentication_url = kwargs.get('authentication_url', None)
if authentication_url is not None:
authentication_url = urlparse.urlparse(authentication_url)
logger.debug("Using credentials for scrape_page")
web_scraper.set_authentication(username, password, authentication_url, username_field, password_field)
# Get the user-agent string
if 'user_agent' in kwargs:
web_scraper.user_agent = kwargs['user_agent']
# Set the proxy authentication
try:
proxy_type, proxy_server, proxy_port, proxy_user, proxy_password = web_input.get_proxy_config(cherrypy.session.get('sessionKey'), conf_stanza)
web_scraper.set_proxy(proxy_type, proxy_server, proxy_port, proxy_user, proxy_password)
except splunk.ResourceNotFound:
cherrypy.response.status = 202
return self.render_error_json(_("Proxy server information could not be obtained"))
# Scrape the page
result = web_scraper.scrape_page(url, selector, **kw)
except FieldValidationException as e:
cherrypy.response.status = 220
return self.render_error_json(_(str(e)))
except ServerNotFoundError as e:
cherrypy.response.status = 220
return self.render_error_json(_(str(e)))
except (SelectorError, SelectorSyntaxError, ExpressionError):
cherrypy.response.status = 220
return self.render_error_json(_("Selector is invalid. "))
except LoginFormNotFound:
cherrypy.response.status = 220
return self.render_error_json("Login form was not found")
except FormAuthenticationFailed:
cherrypy.response.status = 220
return self.render_error_json("Form authentication failed")
except Exception as e:
cherrypy.response.status = 500
logger.exception("Error generated during execution")
return self.render_error_json(_(str(e)))
# Return the information
if 'include_first_result_only' in kwargs:
return self.render_json(result[0], set_mime='application/json')
else:
return self.render_json(result, set_mime='application/json')
def load_page(self, url, **kwargs):
"""
Proxy a web-page through so that a UI can be displayed for showing potential results.
"""
web_client = None
try:
# --------------------------------------
# 1: Make sure that user has permission to make inputs. We don't want to allow people
# to use this as a general proxy.
# --------------------------------------
if not WebInputController.hasCapability('edit_modinput_web_input'):
return self.render_error_html('You need the "edit_modinput_web_input" capability ' +
'to make website inputs')
# Don't allow proxying of the javascript files
if url.endswith(".js"):
cherrypy.response.headers['Content-Type'] = 'application/javascript'
return ""
# --------------------------------------
# 2: Only allow HTTPS if the install is on Splunk Cloud
# --------------------------------------
if ModularInput.is_on_cloud(cherrypy.session.get('sessionKey')) and not url.startswith("https://"):
return self.render_error_html('URLs on Splunk Cloud must use HTTPS protocol')
# --------------------------------------
# 3: Perform a request for the page
# --------------------------------------
# Get the proxy configuration
conf_stanza = "default"
try:
web_input = WebInput(timeout=10)
proxy_type, proxy_server, proxy_port, proxy_user, proxy_password = \
web_input.get_proxy_config(cherrypy.session.get('sessionKey'), conf_stanza)
except splunk.ResourceNotFound:
cherrypy.response.status = 202
return self.render_error_html("Proxy server information could not be obtained")
# Get the timeout to use
timeout = None
if 'timeout' in kwargs:
try:
timeout = int(kwargs['timeout'])
except ValueError:
timeout = 15
else:
timeout = 15
# Get the user-agent
user_agent = kwargs.get('user_agent', None)
# Get the information on the browser to use
browser = None
if 'browser' in kwargs:
browser = kwargs['browser']
# Make the client
if browser is None or browser == WebScraper.INTEGRATED_CLIENT:
web_client = DefaultWebClient(timeout, user_agent, logger)
elif browser == WebScraper.FIREFOX:
web_client = FirefoxClient(timeout, user_agent, logger)
elif browser == WebScraper.CHROME:
web_client = ChromeClient(timeout, user_agent, logger)
web_client.setProxy(proxy_type, proxy_server, proxy_port, proxy_user, proxy_password)
# Get the username and password
username = kwargs.get('username', None)
password = kwargs.get('password', None)
username_field = kwargs.get('username_field', None)
password_field = kwargs.get('password_field', None)
authentication_url = kwargs.get('authentication_url', None)
if username is not None and password is not None:
username = kwargs['username']
password = kwargs['password']
username_field = kwargs.get('username_field', None)
password_field = kwargs.get('password_field', None)
authentication_url = kwargs.get('authentication_url', None)
web_client.setCredentials(username, password)
if authentication_url is not None:
logger.debug("Authenticating using form login in scrape_page")
web_client.doFormLogin(authentication_url, username_field, password_field)
# Get the page
try:
content = web_client.get_url(url, 'GET')
response = web_client.get_response_headers()
except:
logger.exception("Exception generated while attempting to content for url=%s", url)
cherrypy.response.status = 500
return self.render_error_html("Page preview could not be created using a web-browser")
# --------------------------------------
# 4: Render the content with the browser if necessary
# --------------------------------------
"""
if 'text/html' in response['content-type']:
# Get the information on the browser to use
browser = None
if 'browser' in kwargs:
browser = kwargs['browser']
# Try rendering the content using a web-browser
try:
if browser is not None and browser != WebScraper.INTEGRATED_CLIENT:
web_scraper = WebScraper(timeout=timeout)
web_scraper.set_proxy(proxy_type, proxy_server, proxy_port, proxy_user, proxy_password)
web_scraper.set_authentication(username, password)
content = web_scraper.get_result_browser(urlparse.urlparse(url), browser)
except:
logger.exception("Exception generated while attempting to get browser rendering or url=%s", url)
cherrypy.response.status = 500
return self.render_error_html("Page preview could not be created using a web-browser")
"""
# --------------------------------------
# 5: Rewrite the links in HTML files so that they also point to the internal proxy
# --------------------------------------
if "<html" in content:
# Parse the content
html = lxml.html.document_fromstring(content)
# Rewrite the links to point to this internal proxy
rewrite_using_internal_proxy = True
if rewrite_using_internal_proxy:
def relocate_href(link):
"""
Change the hrefs such that they go through the proxy.
"""
link = urlparse.urljoin(url, link)
if link.endswith(".js"):
return ""
if not link.endswith(".css"):
return "load_page?url=" + link
else:
return link
html.rewrite_links(relocate_href)
# Block the href links
for element, attribute, _, _ in html.iterlinks():
if element.tag == "a" and attribute == "href":
element.set('href', "#")
elif element.tag == "form" and attribute == "action":
element.set('action', "?")
else:
html.make_links_absolute(url)
# Determine if we should clean the JS
clean_script = True
if 'clean_script' in kwargs:
clean_script = util.normalizeBoolean(kwargs['clean_script'])
# Determine if we should clean the CSS
clean_styles = False
if 'clean_styles' in kwargs:
clean_styles = util.normalizeBoolean(kwargs['clean_styles'])
# Clean up the HTML
if clean_styles or clean_script:
kill_tags = []
if clean_script:
kill_tags = ["script"]
# Remove the script blocks
cleaner = Cleaner(page_structure=False, kill_tags=kill_tags, javascript=False,
links=False, style=clean_styles, safe_attrs_only=False)
# Get the content
content = lxml.html.tostring(cleaner.clean_html(html))
else:
content = lxml.html.tostring(html)
# --------------------------------------
# 6: Respond with the results
# --------------------------------------
if 'content-type' in response:
cherrypy.response.headers['Content-Type'] = response['content-type']
else:
cherrypy.response.headers['Content-Type'] = 'text/html'
# --------------------------------------
# 7: Clear Javascript files
# --------------------------------------
if response.get('content-type', "") == "application/javascript" \
or response.get('content-type', "") == "application/x-javascript" \
or response.get('content-type', "") == "text/javascript" \
or url.endswith(".js"):
return ""
return content
except LoginFormNotFound:
logger.debug("Login form not found")
return self.render_error_html("Login form was not found")
except FormAuthenticationFailed as e:
logger.debug("Form authentication failed: " + str(e))
return self.render_error_html("Form authentication failed: " + str(e))
except:
logger.exception("Error when attempting to proxy an HTTP request")
cherrypy.response.status = 500
return self.render_error_html("Page preview could not be created")
finally:
if web_client:
web_client.close()