Navigating to "Url", Waiting Until "Load" - Python Playwright Issue
Hey I Have Code in Python Playwright for Getting Page Source: Import Json Import Sys Import Bs4 Import Urllib. Parse from Bs4 Import Beautifulsoup Server_Proxy...
Hey I have code in python playwright for getting page source:
import json
import sys
import bs4
import urllib.parse
from bs4 import BeautifulSoup
server_proxy = urllib.parse.unquote(sys.argv[1])
link = urllib.parse.unquote(sys.argv[2])
from playwright.sync_api import sync_playwright
with sync_playwright() as p:
#browser = p.chromium.launch(headless = False)
browser = p.chromium.launch(proxy={"server": server_proxy,'username': 'xxx',"password": 'xxx' })
context = browser.new_context(user_agent='Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36')
page = context.new_page()
cookie_file = open('cookies_tessco.json')
cookies = json.load(cookie_file)
context.add_cookies(cookies)
page.goto(link)
try:
page.wait_for_timeout(10000)
cont = page.content()
print(cont)
page.close()
context.close()
browser.close()
except Exception as e:
print("Error in playwright script." + page)
page.close()
context.close()
browser.close()
This works okay, but sometimes I receive this error:
Traceback (most recent call last):
File "page_tessco.py", line 17, in <module>
page.goto(link)
File "/usr/local/lib/python3.9/site-packages/playwright/sync_api/_generated.py", line 5774, in goto
self._sync(
File "/usr/local/lib/python3.9/site-packages/playwright/_impl/_sync_base.py", line 103, in _sync
return task.result()
File "/usr/local/lib/python3.9/site-packages/playwright/_impl/_page.py", line 464, in goto
return await self._main_frame.goto(**locals_to_params(locals()))
File "/usr/local/lib/python3.9/site-packages/playwright/_impl/_frame.py", line 117, in goto
await self._channel.send("goto", locals_to_params(locals()))
File "/usr/local/lib/python3.9/site-packages/playwright/_impl/_connection.py", line 36, in send
return await self.inner_send(method, params, False)
File "/usr/local/lib/python3.9/site-packages/playwright/_impl/_connection.py", line 47, in inner_send
result = await callback.future
playwright._impl._api_types.TimeoutError: Timeout 30000ms exceeded.
=========================== logs ===========================
navigating to "", waiting until "load"
I tried to add
page.wait_for_timeout(10000)
but still, these errors appear sometimes, any help, also im confused why this error appears only sometimes, what causes this error, if someone has experience please share it?
2 Answers
loads quit slow. Try to extend the default timeout of 30000ms adding a timeout to page.goto(link):
page.goto(link, timeout = 0)
With setting timeout to 0 you disable the timeout. Documentation
Alternatively, you can disable timeout with the following:
page.set_default_timeout(0)
page.goto(link)
Another alternative (for instances in which you sometimes experience timeouts) is to just keep retrying to load the page over and over by using a while loop that only breaks out of the loop if it is successful in its try block. The key here (and something I learned) is the fact that the continue statement in the except block doesn't return any exception, but rather retries the code within the while loop
import sleep
while True:
try:
page.goto(link)
except:
sleep(<SLEEP FOR SOME AMOUNT OF SECONDS>)
continue
break
The sleep is optional here, but does give your network time to recover if its a networking issue. Also if you want to have max retires (instead of infinite) you can always do:
retries = 1
max_retries = 10
while retries <= max_retries:
try:
page.goto(link)
except:
sleep(<SLEEP FOR SOME AMOUNT OF SECONDS>)
retries += 1
continue
break
Sarah Jenkins is a veteran tech journalist with over 12 years of experience covering artificial intelligence, mobile innovations, and digital ethics. Her insights have appeared in leading technology publications worldwide.
