# \#java

**URL:** https://devforum.zoom.us/tag/java/49.md

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## [How to post a file in contact's chat using java?](https://devforum.zoom.us/t/how-to-post-a-file-in-contacts-chat-using-java/83444)

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**Author:** [@ced](https://devforum.zoom.us/u/ced)\
**Replies:** 8\
**Last updated:** [March 16, 2023, 4:24pm UTC](https://devforum.zoom.us/t/how-to-post-a-file-in-contacts-chat-using-java/83444 "2023-03-16T16:24:35Z")

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I’m trying to send a file in a contact’s chat using oauth server-to-server token (bearer). I’ve tried using simple java classes but I always receive 405 Method Not Allowed error. Here’s my code that uses apache http cl…

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## [Webhook validation url works, but webinar.end signature always fails](https://devforum.zoom.us/t/webhook-validation-url-works-but-webinar-end-signature-always-fails/83023)

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**Author:** [@gustavo1](https://devforum.zoom.us/u/gustavo1)\
**Replies:** 2\
**Last updated:** [February 13, 2023, 9:44pm UTC](https://devforum.zoom.us/t/webhook-validation-url-works-but-webinar-end-signature-always-fails/83023 "2023-02-13T21:44:15Z")

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Hi, we are trying to implement the new webhook validation based on signatures and we have a weird issue. The webhook for the “endpoint url validation” is already validated for our app in development and production, but …