The HTML code size is larger than pcre.backtrack_limit

Open on Drupal.org →

Created on 8 January 2025, 7 months ago

I recently ran into an issue with generating a PDF from a larger data set.

"Uncaught Mpdf\MpdfException: The HTML code size is larger than pcre.backtrack_limit 50000. You should use WriteHTML() with smaller string lengths."

Altering the backtrack_limit was not an option, nor was reducing the source data length, so we patched the module to check whether the HTML exceeded the limit and split the HTML into smaller chunks before writing to MPDF.

I've tagged this as a bug as I think it falls under scalability issues, but probably most people will never run into the backtrack_limit. The attached patch may help for anyone else who does encounter this.

🐛 Bug report

Status

Active

Version

2.2

Component

Code

Created by

🇬🇧United Kingdom kewesley

Live updates comments and jobs are added and updated live.

Sign in to follow issues

Merge Requests

!9The HTML code size is larger than pcre.backtrack_limit
Merged
🇩🇪Germany jan kellermann
updated about 1 month ago

Comments & Activities

Issue created by @kewesley
Comment about 1 month ago →
🇩🇪Germany jan kellermann
We will port to 3.x incl. test.
Merge request !9The HTML code size is larger than pcre.backtrack_limit → (Merged) created by jan kellermann
Comment about 1 month ago →
🇩🇪Germany jan kellermann
I added your patch and added the test for this. You can see the test fails without the patch and suceeds with the patch.

Please test and review.
Comment about 1 month ago →
🇬🇧United Kingdom eyedrops
Works fine!
Behaves as expected. Installed MR9 and am no longer getting this error message. Test looks good as well.
Comment about 1 month ago →
🇩🇪Germany jan kellermann
Thank you for the patch und review!

I merged this issue to 3.x
Comment 23 days ago →
System Message
Automatically closed - issue fixed for 2 weeks with no activity.

contrib.social Blog FAQ Discussions

Production build 0.71.5 2024