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utils_http.py
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import builtins
import importlib
import json
import logging
import os
import re
import time
import traceback
import warnings # to quiet httpx deprecation warnings
import hrequests
import hrequests.exceptions
import httpx
import lxml.etree
import requests
import urllib3
import config
import secrets_file
import utils_random
from thnr_exceptions import FailedAfterRetrying
from Trie import Trie
logger = logging.getLogger(__name__)
logger.setLevel(logging.INFO)
# quiet httpx since it's chatty
httpx_logger = logging.getLogger("httpx")
httpx_logger.setLevel(logging.WARNING)
warnings.filterwarnings("ignore", category=DeprecationWarning, module="httpx")
urllib3.disable_warnings(urllib3.exceptions.InsecureRequestWarning)
empty_page_source = "<html><head></head><body></body></html>"
# user_agent = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.0.0 Safari/537.36"
def endpoint_query_via_requests(url=None, retries=3, delay=8, log_prefix=""):
log_prefix_local = log_prefix + "endpoint_query_via_requests: "
if retries == 0:
logger.info(log_prefix_local + f"failed to GET endpoint {url}")
raise FailedAfterRetrying()
try:
response = requests.get(
url,
headers={"User-Agent": config.settings["SCRAPING"]["UA_STR"]},
timeout=config.settings["SCRAPING"]["REQUESTS_GET_TIMEOUT_S"],
verify=False,
)
response.raise_for_status()
resp_as_dict = response.json()
# logger.info(log_prefix + f"successfully queried endpoint {url}")
return resp_as_dict
except Exception as exc:
pass
handle_exception(exc=exc, log_prefix=log_prefix_local, context={"url": url})
delay *= 2
logger.info(
log_prefix_local
+ f"problem querying url {url} ; will delay {delay} seconds and retry (retries left {retries})"
)
time.sleep(delay)
return endpoint_query_via_requests(
url=url, retries=retries - 1, delay=delay, log_prefix=log_prefix
)
def firebaseio_endpoint_query(query=None, log_prefix=""):
url = "https://hacker-news.firebaseio.com" + query
try:
resp_as_dict = endpoint_query_via_requests(url=url, log_prefix=log_prefix)
logger.info(log_prefix + f"successfully queried {url}")
return resp_as_dict
except requests.exceptions.ConnectionError as exc:
logger.error(
log_prefix + f"firebaseio.com actively refused query {query}: {exc}"
)
raise
except requests.exceptions.RequestException as exc:
logger.warning(
log_prefix + f"GET request failed for firebaseio.com query {query}: {exc}"
)
time.sleep(
int(config.settings["SCRAPING"]["FIREBASEIO_RETRY_DELAY"])
) # in case it's a transient error, such as a DNS issue, wait for some seconds
raise
except Exception as exc:
logger.error(
log_prefix + f"firebaseio.com somehow failed for query {query}: {exc}"
)
raise
def get_content_type_via_head_request(url: str = None, log_prefix=""):
log_prefix_local = log_prefix + "get_content_type_via_head_request: "
if not url:
raise Exception("no URL provided")
headers = None
try:
headers = head_request(url, log_prefix=log_prefix)
except Exception as exc:
exc_name = f"{exc.__class__.__module__}.{exc.__class__.__name__}"
exc_msg = str(exc)
exc_slug = f"{exc_name}: {exc_msg}"
logger.info(log_prefix_local + f"{exc_slug}")
if not headers:
# suppress logging if we're coming from download_og_image() since we log there
if log_prefix.endswith("d_og_i: "):
pass
else:
logger.info(log_prefix_local + f"failed to get HTTP headers for {url}")
return None
# extract content-type from headers
content_type = None
if "content-type" in headers:
for each_ct_val in headers["content-type"].split(";"):
if "charset" in each_ct_val:
continue
if "/" in each_ct_val:
content_type = each_ct_val
break
if content_type == "*/*":
logger.info(log_prefix_local + f"{content_type=} for {url} ~Tim~")
content_type = None
if content_type and "," in content_type:
comma_delimited_content_types = [x.strip() for x in content_type.split(",")]
if len(set(comma_delimited_content_types)) == 1:
content_type = comma_delimited_content_types[0]
else:
logger.info(
log_prefix_local
+ f"multiple content-types {comma_delimited_content_types} found in HTTP headers for url {url} ~Tim~"
)
content_type = None
else:
logger.info(
log_prefix_local + f"content-type is absent from HTTP headers for url {url}"
)
content_type = None
if content_type:
return content_type
else:
logger.info(
log_prefix_local
+ f"content-type could not be determined from HTTP headers for url {url}"
)
return None
def get_list_of_hrequests_exceptions(traceback: str = ""):
excs = [
(
match.group(1).strip(),
match.group(2).strip(),
)
for match in re.finditer(r"(hrequests\.exceptions\.[A-Za-z]+): (.*)", traceback)
]
# for match in re.finditer(r"(hrequests\.exceptions\.[A-Za-z]+): (.*)", traceback):
# excs.append(
# (
# match.group(1).strip(),
# match.group(2).strip(),
# )
# )
return excs
def get_page_source(url=None, log_prefix=""):
log_prefix_local = log_prefix + "get_page_source: "
if not url:
logger.error(log_prefix_local + f"{url} required")
return None
content_encoding_hint = None
while True:
response = None
try:
response = get_page_source_via_hrequests(
url=url,
log_prefix=log_prefix,
content_encoding_hint=content_encoding_hint,
)
except builtins.LookupError as exc:
exc_module = exc.__class__.__module__
exc_short_name = exc.__class__.__name__
exc_name = exc_module + "." + exc_short_name
exc_msg = str(exc)
exc_slug = exc_name + ": " + exc_msg
tb_str = traceback.format_exc()
logger.info(log_prefix_local + exc_slug)
if "unknown encoding" in exc_msg:
content_encoding_hint = "utf_8"
logger.info(
log_prefix_local
+ f"retrying with content_encoding_hint set to {content_encoding_hint}"
)
continue
except Exception as exc:
exc_module = exc.__class__.__module__
exc_short_name = exc.__class__.__name__
exc_name = exc_module + "." + exc_short_name
exc_msg = str(exc)
exc_slug = exc_name + ": " + exc_msg
tb_str = traceback.format_exc()
logger.info(log_prefix + f"{exc_module=} ~Tim~")
logger.info(log_prefix + f"{exc_short_name=} ~Tim~")
logger.error(log_prefix_local + "unexpected exception: " + exc_slug)
logger.error(log_prefix_local + tb_str)
if response:
return response
else:
# logger.info(log_prefix_local + f"gps_via_hr() returned None for {url}")
return None
def get_page_source_via_proxy(url=None, proxy=None, log_prefix=""):
log_prefix_local = log_prefix + "get_page_source_via_proxy: "
if not url:
logger.error(log_prefix_local + f"{url} required")
return None
content_encoding_hint = None
while True:
response = None
try:
response = get_page_source_via_hrequests_via_proxy(
url=url,
log_prefix=log_prefix,
content_encoding_hint=content_encoding_hint,
proxy=proxy,
)
except builtins.LookupError as exc:
exc_module = exc.__class__.__module__
exc_short_name = exc.__class__.__name__
exc_name = exc_module + "." + exc_short_name
exc_msg = str(exc)
exc_slug = exc_name + ": " + exc_msg
tb_str = traceback.format_exc()
logger.info(log_prefix_local + exc_slug)
if "unknown encoding" in exc_msg:
content_encoding_hint = "utf_8"
logger.info(
log_prefix_local
+ f"retrying with content_encoding_hint set to {content_encoding_hint}"
)
continue
except Exception as exc:
exc_module = exc.__class__.__module__
exc_short_name = exc.__class__.__name__
exc_name = exc_module + "." + exc_short_name
exc_msg = str(exc)
exc_slug = exc_name + ": " + exc_msg
tb_str = traceback.format_exc()
logger.info(log_prefix + f"{exc_module=} ~Tim~")
logger.info(log_prefix + f"{exc_short_name=} ~Tim~")
logger.error(log_prefix_local + "unexpected exception: " + exc_slug)
logger.error(log_prefix_local + tb_str)
if response:
return response
else:
# logger.info(log_prefix_local + f"gps_via_hr() returned None for {url}")
return None
def get_page_source_via_hrequests(
url=None, browser="chrome", log_prefix="", content_encoding_hint=None
):
if not url:
return None
page_source_via_get = None
page_source_via_render = None
response = get_response_object_via_hrequests(url, browser, log_prefix)
# get page source via GET
if response:
try:
if content_encoding_hint:
logger.info(
log_prefix
+ f"using content_encoding_hint: {content_encoding_hint} ~Tim~"
)
response.encoding = content_encoding_hint
page_source_via_get = response.text
except Exception as exc:
handle_exception(
exc=exc,
log_prefix=log_prefix + "gps_via_hr(): get: ",
context={"url": url},
)
# try to get page source via render()
try:
with response.render(headless=True, mock_human=True) as page:
time.sleep(utils_random.random_real(0, 1))
page.goto(url)
time.sleep(utils_random.random_real(6, 10))
page_source_via_render = (
page.html.find("html").html
if (page.html and page.html.find("html"))
else ""
)
except Exception as exc:
handle_exception(
exc=exc,
log_prefix=log_prefix + "gps_via_hr(): render: ",
context={"url": url},
)
if page_source_via_get:
if page_source_via_get == empty_page_source:
logger.info(
log_prefix + f"matched empty_page_source on response for {url} ~Tim~"
)
len_page_source_via_get = 0
else:
len_page_source_via_get = len(page_source_via_get)
else:
len_page_source_via_get = 0
if page_source_via_render:
if page_source_via_render == empty_page_source:
logger.info(
log_prefix + f"matched empty_page_source on response for {url} ~Tim~"
)
len_page_source_via_render = 0
else:
len_page_source_via_render = len(page_source_via_render)
else:
len_page_source_via_render = 0
if len_page_source_via_get + len_page_source_via_render == 0:
logger.info(log_prefix + f"failed to get page source for {url}")
return None
else:
if len_page_source_via_render >= len_page_source_via_get:
page_source = page_source_via_render
logger.info(log_prefix + f"got page_source (via render) for {url}")
else:
page_source = page_source_via_get
logger.info(log_prefix + f"got page_source (via GET) for {url}")
# logger.info(log_prefix + f"got page source for {url}")
return page_source
def get_page_source_via_hrequests_via_proxy(
url=None,
browser="chrome",
log_prefix="",
content_encoding_hint=None,
proxy=None,
):
if not url:
return None
page_source_via_get = None
page_source_via_render = None
response = get_response_object_via_hrequests_via_proxy(
url=url,
browser=browser,
log_prefix=log_prefix,
proxy=proxy,
)
# get page source via GET
if response:
try:
if content_encoding_hint:
logger.info(
log_prefix
+ f"using content_encoding_hint: {content_encoding_hint} ~Tim~"
)
response.encoding = content_encoding_hint
page_source_via_get = response.text
except Exception as exc:
handle_exception(
exc=exc,
log_prefix=log_prefix + "gps_via_hr_via_proxy(): get: ",
context={"url": url},
)
# try to get page source via render()
try:
with response.render(headless=True, mock_human=True) as page:
time.sleep(utils_random.random_real(0, 1))
page.goto(url)
time.sleep(utils_random.random_real(6, 10))
page_source_via_render = (
page.html.find("html").html
if (page.html and page.html.find("html"))
else ""
)
except Exception as exc:
handle_exception(
exc=exc,
log_prefix=log_prefix + "gps_via_hr_via_proxy(): render: ",
context={"url": url},
)
if page_source_via_get:
if page_source_via_get == empty_page_source:
logger.info(
log_prefix + f"matched empty_page_source on response for {url} ~Tim~"
)
len_page_source_via_get = 0
else:
len_page_source_via_get = len(page_source_via_get)
else:
len_page_source_via_get = 0
if page_source_via_render:
if page_source_via_render == empty_page_source:
logger.info(
log_prefix + f"matched empty_page_source on response for {url} ~Tim~"
)
len_page_source_via_render = 0
else:
len_page_source_via_render = len(page_source_via_render)
else:
len_page_source_via_render = 0
if len_page_source_via_get + len_page_source_via_render == 0:
logger.info(log_prefix + f"failed to get page source via proxy for {url}")
return None
else:
if len_page_source_via_render >= len_page_source_via_get:
page_source = page_source_via_render
logger.info(
log_prefix + f"got page_source via proxy (via render) for {url}"
)
else:
page_source = page_source_via_get
logger.info(log_prefix + f"got page_source via proxy (via GET) for {url}")
# logger.info(log_prefix + f"got page source for {url}")
return page_source
# def gps_via_hro(response_object=None, log_prefix=""):
# log_prefix_local = log_prefix + "gps_via_hro: "
# # get page source via GET
# page_source_via_get = response_object.text
# page_source_via_render = None
# # try to get page source via render()
# url = response_object.url
# try:
# with response_object.render(headless=True, mock_human=True) as page:
# time.sleep(utils_random.random_real(0, 1))
# page.goto(url)
# time.sleep(utils_random.random_real(0, 1))
# if page.html and page.html.find("html"):
# page_source_via_render = page.html.find("html").html
# else:
# page_source_via_render = ""
# except Exception as exc:
# logger.info(log_prefix_local + "got exception in render: " + str(exc))
# handle_exception(
# exc=exc, log_prefix=log_prefix_local + "render: ", context={"url": url}
# )
# if page_source_via_get:
# if page_source_via_get == empty_page_source:
# len_page_source_via_get = 0
# else:
# len_page_source_via_get = len(page_source_via_get)
# else:
# len_page_source_via_get = 0
# if page_source_via_render:
# if page_source_via_render == empty_page_source:
# len_page_source_via_render = 0
# else:
# len_page_source_via_render = len(page_source_via_render)
# else:
# len_page_source_via_render = 0
# if len_page_source_via_get + len_page_source_via_render == 0:
# logger.info(log_prefix_local + f"failed to get page source for {url}")
# return None
# else:
# if len_page_source_via_render >= len_page_source_via_get:
# page_source = page_source_via_render
# logger.info(log_prefix_local + f"got page_source (via render) for {url}")
# else:
# page_source = page_source_via_get
# logger.info(log_prefix_local + f"got page_source (via GET) for {url}")
# # logger.info(log_prefix_local + f"got page source for {url}")
# return page_source
# def get_rendered_page_source_via_response_object(response_object, log_prefix=""):
# log_prefix_local = log_prefix + "get_rendered_page_source_via_response_object: "
# url = response_object.url
# try:
# with response_object.render(headless=True, mock_human=True) as page:
# time.sleep(utils_random.random_real(0, 1))
# page.goto(url)
# time.sleep(utils_random.random_real(0, 1))
# if page.html and page.html.find("html"):
# page_source_via_render = page.html.find("html").html
# else:
# page_source_via_render = ""
# except Exception as exc:
# logger.info(log_prefix_local + "got exception in render: " + str(exc))
# handle_exception(
# exc=exc, log_prefix=log_prefix_local + "render: ", context={"url": url}
# )
def get_response_object_via_hrequests(
url=None,
browser="chrome",
log_prefix="",
):
if not url:
return None
log_prefix_local = log_prefix + "gro_via_hr: "
with hrequests.Session(
browser=browser,
os=os.getenv("CUR_OS", default="lin"),
temp=True,
verify=False,
) as session:
user_agent = (
config.settings["SCRAPING"]["UA_STR"]
if "SCRAPING" in config.settings
else "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.0.0 Safari/537.36"
)
session.headers.update({"User-Agent": user_agent})
try:
timeout = (
config.settings["SCRAPING"]["REQUESTS_GET_TIMEOUT_S"]
if "SCRAPING" in config.settings
else 30
)
response = session.get(
allow_redirects=True,
headers={"Accept": "text/html,*/*"},
timeout=timeout,
url=url,
)
if response and response.status_code == 200:
return response
else:
logger.info(
log_prefix_local
+ f"Failed to get response object. {response.status_code=}. {url=}"
)
return None
except Exception as exc:
handle_exception(
exc=exc,
log_prefix=log_prefix_local,
context={"url": url},
)
return None
def get_response_object_via_hrequests_via_proxy(
url=None,
browser="chrome",
log_prefix="",
proxy=None,
):
if not url:
return None
if not proxy:
proxy = secrets_file.PROXY_URL
log_prefix_local = log_prefix + "gro_via_hr_via_proxy: "
with hrequests.Session(
browser=browser,
os=os.getenv("CUR_OS", default="lin"),
temp=True,
verify=False,
proxy=proxy,
) as session:
user_agent = (
config.settings["SCRAPING"]["UA_STR"]
if "SCRAPING" in config.settings
else "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.0.0 Safari/537.36"
)
session.headers.update({"User-Agent": user_agent})
try:
timeout = (
config.settings["SCRAPING"]["REQUESTS_GET_TIMEOUT_S"]
if "SCRAPING" in config.settings
else 30
)
response = session.get(
allow_redirects=True,
headers={"Accept": "text/html,*/*"},
timeout=timeout,
url=url,
)
if response and response.status_code == 200:
logger.info(
log_prefix_local
+ f"Got response object. {response.status_code=}. {url=}"
)
return response
else:
logger.info(
log_prefix_local
+ f"Failed to get response object. {response.status_code=}. {url=}"
)
return None
except Exception as exc:
handle_exception(
exc=exc,
log_prefix=log_prefix_local,
context={"url": url},
)
return None
# get_response_object_via_hrequests_via_proxy = get_response_object_via_hrequests
def get_response_object_via_requests(
url=None,
log_prefix="",
):
if not url:
return None
log_prefix_local = log_prefix + "gro_via_r: "
with requests.Session() as session:
user_agent = (
config.settings["SCRAPING"]["UA_STR"]
if "SCRAPING" in config.settings
else "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.0.0 Safari/537.36"
)
session.headers.update({"User-Agent": user_agent})
try:
timeout = (
config.settings["SCRAPING"]["REQUESTS_GET_TIMEOUT_S"]
if "SCRAPING" in config.settings
else 30
)
with session.get(
allow_redirects=True,
headers={"Accept": "text/html,*/*"},
stream=False,
timeout=timeout,
url=url,
verify=False,
# proxies=secrets_file.proxies_for_requests,
) as response:
if response and response.status_code == 200:
return response
else:
logger.info(
log_prefix_local
+ f"Failed to get response object. {response.status_code=}. {url=}"
)
return None
except Exception as exc:
handle_exception(
exc=exc,
log_prefix=log_prefix_local,
context={"url": url},
)
return None
browser_exception_msg_prefixes = [
"Browser was closed. Attribute call failed: close",
"Cookie should have a valid expires, only -1 or a positive number for the unix timestamp in seconds is allowed",
"Navigation failed because page crashed!",
"Navigation failed because page was closed!",
"Protocol error (Storage.setCookies): Invalid cookie fields",
"Target crashed",
"Target page, context or browser has been closed",
"Timeout 30000ms exceeded.",
"net::ERR_ABORTED",
"net::ERR_CERT_COMMON_NAME_INVALID",
"net::ERR_HTTP_RESPONSE_CODE_FAILURE",
"net::ERR_NAME_NOT_RESOLVED",
"net::ERR_NETWORK_CHANGED",
"net::ERR_SOCKET_NOT_CONNECTED",
]
browser_exception_msg_prefixes_trie = Trie(prefix_search=True)
for _ in browser_exception_msg_prefixes:
browser_exception_msg_prefixes_trie.add_member(_)
hrequests_exceptions_suffixes = [
" EOF",
"EOF (Client.Timeout exceeded while awaiting headers)",
"context deadline exceeded (Client.Timeout exceeded while awaiting headers)",
"http2: unsupported scheme",
"i/o timeout (Client.Timeout exceeded while awaiting headers)",
"i/o timeout",
"no such host",
"remote error: tls: unexpected message",
"remote error: tls: user canceled",
"stream error: stream ID 1; INTERNAL_ERROR",
"unexpected EOF",
"x509: certificate signed by unknown authority",
]
hrequests_exceptions_suffixes_trie = Trie(suffix_search=True)
for _ in hrequests_exceptions_suffixes:
hrequests_exceptions_suffixes_trie.add_member(_)
def handle_exception(exc: Exception = None, log_prefix="", context=None):
# handle exceptions for:
# - get_page_source_via_hrequests
# - get_page_source_via_response_object
# - get_rendered_page_source_via_response_object
# - get_response_object_via_hrequests2
# - head_request
# TODO: in future, for many of these exceptions, we could check archive.is, WBM, google cache, etc. for the url
log_prefix_local = log_prefix + "handle_exception: "
exc_module = exc.__class__.__module__
exc_name = exc.__class__.__name__
fq_exc_name = exc_module + "." + exc_name
exc_msg = str(exc)
exc_slug = fq_exc_name + ": " + exc_msg
url = context["url"] if (context and "url" in context) else ""
if url:
url_slug = f" for url {url}"
else:
url_slug = ""
tb_str = traceback.format_exc()
if fq_exc_name == "requests.exceptions.SSLError":
logger.info(
log_prefix_local
+ f"fq_exc_name==requests.exceptions.SSLError succeeded, {exc_module=}, {exc_msg=} ~Tim~"
)
if exc_name == "SSLError":
logger.info(
log_prefix_local
+ f"exc_name==SSLError succeeded, {exc_module=}, {exc_msg=} ~Tim~"
)
# for hrequests.exceptions only, check for stacked exceptions
expected_stacked_exceptions = None
if exc_module == "hrequests.exceptions":
excs = get_list_of_hrequests_exceptions(tb_str)
# log the stacked exception, then promote the initial exception (`excs[0][0]`) to be handled by code that follows
len_excs = len(excs)
if len_excs > 1:
expected_stacked_exceptions = False
if excs[len_excs - 1][1] == "Browser was closed.":
expected_stacked_exceptions = True
elif (
excs[len_excs - 1][1]
== "Browser was closed. Attribute call failed: close"
):
expected_stacked_exceptions = True
elif excs[len_excs - 1][1] == "Connection error":
expected_stacked_exceptions = True
if expected_stacked_exceptions:
logger.info(
log_prefix_local
+ "stacked exceptions: "
+ str(excs)
+ " "
+ url_slug
)
else:
logger.info(
log_prefix_local
+ "unexpected stacked exceptions: "
+ str(excs)
+ " "
+ url_slug
)
logger.info(log_prefix_local + tb_str)
for i in range(len(excs)):
for j in range(len(excs[0])):
logger.info(log_prefix_local + f"excs[{i}][{j}]: {excs[i][j]}")
# assign intial exception to variable `exc`
module_path, _, exc_class_name = excs[0][0].rpartition(".")
module = importlib.import_module(module_path)
exc_class = getattr(module, exc_class_name)
exc = exc_class(excs[0][1])
exc_module = exc.__class__.__module__
exc_name = exc.__class__.__name__
fq_exc_name = exc_module + "." + exc_name
exc_msg = str(exc)
exc_slug = fq_exc_name + ": " + exc_msg
expected_exception = False
if exc_module == "hrequests.exceptions":
if isinstance(exc, hrequests.exceptions.BrowserException):
if exc_msg == "Browser closed.":
expected_exception = True
elif (
exc_msg
== "Unable to retrieve content because the page is navigating and changing the content."
):
expected_exception = True
elif browser_exception_msg_prefixes_trie.search(exc_msg) is not None:
expected_exception = True
elif exc_msg.startswith("net::ERR_CERT_DATE_INVALID"):
expected_exception = True
elif "cookies" in exc_msg:
pattern = r"cookies\[\d+\]\.value: expected string, got undefined"
match = re.search(pattern, exc_msg)
if match:
expected_exception = True
elif isinstance(exc, hrequests.exceptions.BrowserTimeoutException):
match = re.search(r"Timeout \d+ms exceeded\.", exc_msg)
if match:
expected_exception = True
elif isinstance(exc, hrequests.exceptions.ClientException):
if hrequests_exceptions_suffixes_trie.search(exc_msg) is not None:
expected_exception = True
elif "net/http: request canceled" in exc_msg:
expected_exception = True
elif (
": net/http: HTTP/1.x transport connection broken: malformed HTTP response"
in exc_msg
):
expected_exception = True
elif exc_module == "requests.exceptions":
logger.info(
log_prefix_local
+ f"{type(exc)=}, {fq_exc_name=}, {exc_msg=}, {url_slug=}, module s.b. requests.exceptions)"
)
if isinstance(exc, requests.exceptions.ConnectTimeout):
if "Max retries exceeded with url" in exc_msg:
expected_exception = True
elif isinstance(exc, requests.exceptions.ConnectionError):
if exc_msg.endswith('Temporary failure in name resolution)"))'):
expected_exception = True
elif "No address associated with hostname" in exc_msg:
expected_exception = True
elif "Connection refused" in exc_msg:
expected_exception = True
elif "Name or service not known" in exc_msg:
expected_exception = True
elif "Remote end closed connection without response" in exc_msg:
expected_exception = True
elif "Read timed out." in exc_msg:
expected_exception = True
elif isinstance(exc, requests.exceptions.HTTPError):
if "502 Server Error: Bad Gateway for url" in exc_msg:
expected_exception = True
elif isinstance(exc, requests.exceptions.InvalidSchema):
if "No connection adapters were found" in exc_msg:
expected_exception = True
elif isinstance(exc, requests.exceptions.InvalidURL):
expected_exception = True
elif isinstance(exc, requests.exceptions.ReadTimeout):
if "Read timed out." in exc_msg:
expected_exception = True
elif isinstance(exc, requests.exceptions.SSLError):
if "EOF occurred in violation of protocol" in exc_msg:
expected_exception = True
elif "SSL: SSLV3_ALERT_HANDSHAKE_FAILURE" in exc_msg:
expected_exception = True
elif "SSL: TLSV1_UNRECOGNIZED_NAME" in exc_msg:
expected_exception = True
elif "SSL: UNEXPECTED_EOF_WHILE_READING" in exc_msg:
expected_exception = True
elif "SSL: UNSAFE_LEGACY_RENEGOTIATION_DISABLED" in exc_msg:
expected_exception = True
elif isinstance(exc, requests.exceptions.TooManyRedirects):
expected_exception = True
elif exc_module == "lxml.etree":
if isinstance(exc, lxml.etree.ParserError):
if "Document is empty" in exc_msg:
expected_exception = True
elif exc_module == "builtins":
if isinstance(exc, builtins.LookupError):
if "unknown encoding" in exc_msg:
raise
if expected_exception:
logger.info(log_prefix_local + exc_slug + url_slug)
else:
logger.error(log_prefix_local + "unexpected exception: " + exc_slug + url_slug)
logger.error(
log_prefix_local
+ f"unexpected exception name breakdown: {exc_module=} {exc_name=}"
)
if not tb_str:
tb_str = traceback.format_exc()
logger.error(log_prefix_local + tb_str)
def head_request(url=None, log_prefix=""):
log_prefix += "head_request: "
if not url:
# logger.error(log_prefix + "no URL provided")
raise Exception("no URL provided")
try:
response = requests.head(
url,
headers={"User-Agent": config.settings["SCRAPING"]["UA_STR"]},