# Sanitize "invalid UTF-8 byte sequence"

**URL:** <https://www.ruby-forum.com/t/sanitize-invalid-utf-8-byte-sequence/237838>\
**Category:** NGINX\
**Created:** [December 3, 2013, 10:03am UTC](https://www.ruby-forum.com/t/sanitize-invalid-utf-8-byte-sequence/237838 "2013-12-03T10:03:42Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Detlef\_R](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/58f4c7/32.png) [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\
**Post date:** [December 3, 2013, 10:03am UTC](https://www.ruby-forum.com/t/sanitize-invalid-utf-8-byte-sequence/237838/1 "2013-12-03T10:03:42Z")

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Hi

I’m getting forged requests with invalid UTF-8 byte sequences on my  
Rails  
app which is served with Nginx/Passenger. Is there a way to have Nginx  
sanitize requests before they are passed to Passenger?

Thanks for your hints!