OTAURL on Private Server not working

[AhmadNaeemBEL]

Hello,

I am trying to upgrade my Tasmota device from MQTT commands.
OTA is successful from OTAUrl on Tasmota official server.
But when I try to do OTA from my private server Tasmota gives the error.

14:36:10.019 MQT: stat/tasmota_027D83/UPGRADE = {"Upgrade":"Failed Server Did Not Report Size"}

I checked Tasmota official OTAUrl and my OTAUrl on postman following is the result.

This is the snip of my private OTAURl

This is the snip of Tasmota OTAUrl.

Kindly help me resolve the issue.

Kind Regards

[Jason2866]

Try a different webserver. For example https://github.com/arendst/Tasmota/tree/development/tools/ota_server

[sfromis]

I'm seeing that message if the server responds with an error message (or did not include the header field with length). Check with a browser to see if it responds with a binary file.

[AhmadNaeemBEL]

Yes, it responds.

[barbudor]

@AhmadNaeemBEL
Your screen shot show that Content-Length is returned. But is that coming from the effective transaction between your ESP and the server ?
Can you capture the exchange using tcpdump/wireshark and check the presence of the header ?

[AhmadNaeemBEL]

No I just check the URL on Postman.
I didn't check if headers are coming from effective transaction between server and ESP.

Okay I will try to capture.

Thanks for the reply.

[sfromis]

My private OTA server only returns a few header fields. In addition to status, it is Date, Server, Content-Length and Content-Type. I'd not expect Server to be important, just found it clearer to identify the source. Are you using http? Encrypted https is not supported.

[AhmadNaeemBEL]

Yes I am using http.

But it is not working.

[ascillato]

TasmoAdmin ( https://github.com/reloxx13/TasmoAdmin ) uses OTAUrl and it is working fine.

As explained before, OTAUrl only works with http protocol. Https is not supported.

[AhmadNaeemBEL]

I am using http.

But it is not working.