I've loaded custom fonts from Google fonts - but invoking via Worker, might be different via API
I've loaded custom fonts from Google fonts - but invoking via Worker, might be different via API
AYeah unfortunately we can't use Google fonts, we've got a custom font we self-host on our CDN. I know we can do this with a Worker, but we'd really rather not do that - our main app is hosted on GCP right now and building a GCP <> CF auth integration is more effort than it's worth to get fast PDF rendering
HDoes anyone else have this issue?
curl -X 'POST' 'https://api.cloudflare.com/client/v4/accounts/9357fcd5fdd482d8ff83604451aad279/browser-rendering/markdown' \
-H 'Content-Type: application/json' \
-H 'Authorization: Bearer INkf8LWxNWrE96x4Z-zDCiAgoxMG6KfUuYvUAvyg' \
-d '{
"url": "https://www.czone.com.pk/graphic-cards-pakistan-ppt.154.aspx"
}'
{"success":true,"result":"# !Icon for www.czone.com.pkwww.czone.com.pk\n\nVerifying you are human. This may take a few seconds.
\n\nwww.czone.com.pk needs to review the security of your connection before proceeding.\n\nVerification successful\n\nWaiting for www.czone.com.pk to respond...\n\nRay ID:
ce & security by Cloudflare"}
I'm simply trying to get prices from a website and get blocked by cloudflare itself. So its not possible to use cloudflare browser rendering for website that use cloudflare?
curl -X 'POST' 'https://api.cloudflare.com/client/v4/accounts/9357fcd5fdd482d8ff83604451aad279/browser-rendering/markdown' \
-H 'Content-Type: application/json' \
-H 'Authorization: Bearer INkf8LWxNWrE96x4Z-zDCiAgoxMG6KfUuYvUAvyg' \
-d '{
"url": "https://www.czone.com.pk/graphic-cards-pakistan-ppt.154.aspx"
}'
{"success":true,"result":"# !Icon for www.czone.com.pkwww.czone.com.pk\n\nVerifying you are human. This may take a few seconds.
\n\nwww.czone.com.pk needs to review the security of your connection before proceeding.\n\nVerification successful\n\nWaiting for www.czone.com.pk to respond...\n\nRay ID:
997a23bf1a81339e\n\nPerformance & security by Cloudflare"}
I'm simply trying to get prices from a website and get blocked by cloudflare itself. So its not possible to use cloudflare browser rendering for website that use cloudflare?
Chey there ! using Stagehand in Browser Rendering I am wondering how to reuse sessions the same way its currently possible in Puppeteer as per these documentation : https://developers.cloudflare.com/browser-rendering/workers-bindings/reuse-sessions/
I am not sure I cant get to the browser sesh there and would love to not use DO for that
I am not sure I cant get to the browser sesh there and would love to not use DO for that
Cloudflare Docs
The best way to improve the performance of your browser rendering Worker is to reuse sessions. One way to do that is via Durable Objects, which allows you to keep a long running connection from a Worker to a browser. Another way is to keep the browser open after you've finished with it, and connect to that session each time you have a new request.
Cmaybe here ? https://docs.stagehand.dev/v3/best-practices/cost-optimization#3-optimize-browser-sessions
Stagehand Docs
Minimize costs while maintaining automation performance
KWhether browser rendering can access a site or not depends on the settings of that site. So seems the site you are trying to use is blocking bots
Browser rendering always identifies itself as a bot, so if the site owner chooses to block all bots, then browser rendering will be blocked too.
if it's a site you own, you can create a rule to allow for browser rendering
https://developers.cloudflare.com/browser-rendering/faq/#will-browser-rendering-bypass-cloudflares-bot-protection
Browser rendering always identifies itself as a bot, so if the site owner chooses to block all bots, then browser rendering will be blocked too.
if it's a site you own, you can create a rule to allow for browser rendering
https://developers.cloudflare.com/browser-rendering/faq/#will-browser-rendering-bypass-cloudflares-bot-protection
Cloudflare Docs
Below you will find answers to our most commonly asked questions about Browser Rendering.
DWhen trying to launch the browser inside a worker, it works 100% of the time. When launching from a workflow, it fails about half of the time with this error:
workerd/jsg/setup.c++:38: fatal: V8 fatal error; location = :0; message = Missing deoptimization information for OptimizedJSFrame::Summarize.
workerd/jsg/setup.c++:38: fatal: V8 fatal error; location = :0; message = Missing deoptimization information for OptimizedJSFrame::Summarize.
Kyou can
addStyleTag to customize. see example here https://developers.cloudflare.com/browser-rendering/rest-api/screenshot-endpoint/#customize-css-and-embed-custom-javascriptCloudflare Docs
The /screenshot endpoint renders the webpage by processing its HTML and JavaScript, then captures a screenshot of the fully rendered page.
Kchecked with the team:
They can use
Full example here https://developers.cloudflare.com/browser-rendering/workers-bindings/reuse-sessions/#4-code
They can use
keep_alive , eg const browser = await puppeteer.launch(env.MYBROWSER, { keep_alive: 600000 }); to keep the browser alive for 10 minutes, and then, in order to get a valid sessionId, they need to call https://developers.cloudflare.com/browser-rendering/platform/puppeteer/#list-open-sessions . Full example here https://developers.cloudflare.com/browser-rendering/workers-bindings/reuse-sessions/#4-code
Cloudflare Docs
The best way to improve the performance of your browser rendering Worker is to reuse sessions. One way to do that is via Durable Objects, which allows you to keep a long running connection from a Worker to a browser. Another way is to keep the browser open after you've finished with it, and connect to that session each time you have a new request.
CHey! Thanks for your reply, I have found this link already, but does this work for stagehand ? This seems to only work for puppeteer; I literally posted this link in my OG post haha
VThe /snapshot API documentation is outdated? or the response has been changed, I don't see
status in response, instead the response just display success: true/false, while I was expecting the response status: 2xx, 4xx etc retuned by given URL. As it always says success: true, even for 404 link as well
VFor example, I passed a bad link in url - which return 404 on browser, but there are no way to find out it retuned 404 using the /snapshot API. Which enforce me to send 2 requests (one for status, another for snapshot)
NHave anyone ran into an issue while trying to download a file via Playwright
The readable has no data in it. Doesn't throw an error, but just 0 chunks.
Download.createReadStream() API?The readable has no data in it. Doesn't throw an error, but just 0 chunks.
AYes we've tried both
addStyleTag as well as an embedded stylesheet in the HTML with font as an allowed resource type, neither work
Mi made a worker for browser rendering and deployed it, the first request i made i got this error, why?
Error: Unable to create new browser: code: 429: message: Rate limit exceeded
Stack trace:
Error: Unable to create new browser: code: 429: message: Rate limit exceeded
at PuppeteerWorkers.acquire (index.js:18328:13)
at async PuppeteerWorkers.launch (index.js:18238:22)
at async Object.fetch (index.js:19976:23)
Error: Unable to create new browser: code: 429: message: Rate limit exceeded
Stack trace:
Error: Unable to create new browser: code: 429: message: Rate limit exceeded
at PuppeteerWorkers.acquire (index.js:18328:13)
at async PuppeteerWorkers.launch (index.js:18238:22)
at async Object.fetch (index.js:19976:23)
Manyone?
MHey team, what's going on here?
I'm trying to run the documented code snippet from https://developers.cloudflare.com/browser-rendering/rest-api/json-endpoint/#using-a-custom-model-byo-api-key
Simply replacing the ai provider from anthropic to google-ai-studio/gemini-2.5-flash, or google-ai-studio/gemini-flash-latest. I get the error {"success":false,"errors":[{"message":"AI error: undefined: undefined"}]}%. Looks like someone else is having the problem too: https://community.cloudflare.com/t/browser-rendering-json-with-custom-ai/854912
Am I missing something here, or is the snippet in the documentation incorrect?
I'm trying to run the documented code snippet from https://developers.cloudflare.com/browser-rendering/rest-api/json-endpoint/#using-a-custom-model-byo-api-key
Simply replacing the ai provider from anthropic to google-ai-studio/gemini-2.5-flash, or google-ai-studio/gemini-flash-latest. I get the error {"success":false,"errors":[{"message":"AI error: undefined: undefined"}]}%. Looks like someone else is having the problem too: https://community.cloudflare.com/t/browser-rendering-json-with-custom-ai/854912
Am I missing something here, or is the snippet in the documentation incorrect?
Zany chance anyone is making screenshot of an element? screenshot of playwright page works excelent, but when I try to run locator to find some element and then run screenshot - timeouts, tried like 5-6 different methods to get element
ZI wonder how much of time of browser rendering cpu time of workers is counted. Since browser rendering is paid, I hope majority of time spent on that will not be billed as worker cpu-time?
Mdid you find a resolution for this? same thing with me
MAlas, i assume there is a bug
that's about 4 seconds and i see in the UI it looks like
that's about 4 seconds and i see in the UI it looks like
KAre you on the Workers Paid plan? or Workers Free plan?
Users on Workers Free are limited to 10 minutes a day https://developers.cloudflare.com/browser-rendering/limits/#workers-free
Users on Workers Free are limited to 10 minutes a day https://developers.cloudflare.com/browser-rendering/limits/#workers-free
Ktimestart being the wrong year is a bug - on our list to fix
Mawesome! its the free plan, am planning to upgrade but just wanted to test this out - this is the only request i made today and everything after said it was 429'd - so 4 seconds == hit my limit for the day based on the logs i see
Kcan you dm me your account id?
odd you weren't able to use 10 minutes
odd you weren't able to use 10 minutes
KHi y'all!
Browser Rendering is due for a dashboard update
What would you like to see added to the dashboard?
Please feel free to chime in here on chat or we can discuss live! https://calendar.app.google/Xe4EWuvaAVvehDPC6
Browser Rendering is due for a dashboard update
What would you like to see added to the dashboard?Please feel free to chime in here on chat or we can discuss live! https://calendar.app.google/Xe4EWuvaAVvehDPC6
Kthis is fixed! thanks for raising~
T@Kathy I am having the same issue on my end. I can see another user reporting this as well: https://community.cloudflare.com/t/browser-rendering-json-with-custom-ai/854912
1Have tried using the Browser Rendering REST API, but it isn't working. The Workers API binding works fine, and I have created a new API token with Browser Rendering Edit perms. I can confirm that using a different token gives an auth error. Doesn't work with either a URL or HTML body param
1Also, in the Workers binding, is it normal for it to take 7-10 seconds to get a screenshot response for a very simple HTML page hosted on CF?
TWere you able to find a solution? The custom AI provider feature doesn't work
AKjson endpoint bugs have been fixed for both gemini and openai! thanks for reporting @arnaseef , @TheCrazyBob , @Masquerades
TI can't get it to work with openai's models. Haven't tried gemini yet. I always get the following error:
HHi, could anybody give a sample usage about the snapshot API (https://developers.cloudflare.com/api/python/resources/browser_rendering/subresources/snapshot/methods/create/) ?
I wanna add the "full_page" and "type" to request, but I always get a error:
I have tried these 2 request body ,but not work either:
I got this error:
How should I fix it ? Thanks
I wanna add the "full_page" and "type" to request, but I always get a error:
I have tried these 2 request body ,but not work either:
I got this error:
How should I fix it ? Thanks
Interact with Cloudflare's products and services via the Cloudflare API
H@Kathy hi,Kathy , could you help me ?
Gyou're running POST @ /accounts/{account_id}/browser-rendering/snapshot right?
Gbased on the docs ur i think the first example should be the functioning one
HI see, what happend. "screenshot_options" should be "screenshotOptions"
Ghuh, that's weird. that wasn't very clear in the docs
Gi was super confused bc to me scerenshot_options should've worked
Kthink issue might have been you were in python docs so you got
screenshot_optionsscreenshotOptions
Kcan you dm me your account id
WWhat does this mean?
I'm seeing this periodically (and inconsistently) on browser launch.
I'm seeing this periodically (and inconsistently) on browser launch.
Kfrom a quick perusal, we don't see that error in our logs. are you sure that's from us?
WIt's definitely coming from Browser Rendering - the uuid also matches up with my BR logs. I'm invoking using
await puppeteer.launch(env.BROWSER)
TThe
cacheTTLIm still having issues accessing the Browser Rendering REST API, every request returns a
Not Found.
Kdm me your account id please
1Done
