# Mini oneboxing doesn't preview for encoding slug generation method

**URL:** <https://meta.discourse.org/t/mini-oneboxing-doesnt-preview-for-encoding-slug-generation-method/73007>\
**Category:** Bug\
**Created:** [October 29, 2017, 2:48pm UTC](https://meta.discourse.org/t/mini-oneboxing-doesnt-preview-for-encoding-slug-generation-method/73007 "2017-10-29T14:48:29Z")\
**Posts on this page:** 1\
**Showing post:** 2

<div class="post-metadata">

**Author:** ![youwiki](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/youwiki/32/89936_2.png) [@youwiki](https://meta.discourse.org/u/youwiki)\
**Post date:** [October 29, 2017, 3:21pm UTC](https://meta.discourse.org/t/mini-oneboxing-doesnt-preview-for-encoding-slug-generation-method/73007/2 "2017-10-29T15:21:05Z")

</div>

It seems that `Excon.public_send(@http_verb, ...)` return 404.  
Oneboxing, for example, this file: [https://www.nalog.ru/html/sites/www.new.nalog.ru/docs/instruction\_installation.pdf](https://www.nalog.ru/html/sites/www.new.nalog.ru/docs/instruction_installation.pdf) also don’t work.  
May be some request headers wrong, or some additional properties need to set for Excon?

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