Android Question okHttp Headers question

timwil · Sunday at 6:01 PM

I am using b4a version 13.00 with OkHttp version 1.50 trying to send an encrypted JSON payload.

b4a:

    Request.InitializePost2(Transmit,xLine.GetBytes("UTF8"))
    Request.Timeout = 20000
    Request.SetHeader("Content-Type","text/plain")
    Request.SetHeader("X-API-Key","my API Key goes here")
    host.Execute(Request, 1)

I have another platform and have tested my encrypted JSON payload so I know the encryption is working (Thank you Andrew Graham! )

When I try to inquire at the server I am getting a http status code of 415.
Based on the previous platform I know that it is failing at the authentication level.
Is there any way to confirm that b4a is indeed attaching the required headers?

zed · Sunday at 6:38 PM

HTTP error code 415 almost always indicates a Content-Type problem, not an authentication issue.

In your code, you're using "text/plain" but you're using JSON.
It's likely that the server expects application/json, or a specific type defined by the API (for example, application/octet-stream, application/encrypted+json, etc.).

timwil · Sunday at 6:44 PM

I just finished developing this on a PHP based server. When I did not have the correct headers I got 415 and 401. When I included the proper API headers the error message went to 500 when I had the wrong content. It says text/plain because the JSON data is encrypted with AES-256-CBC then encoded with base64

timwil · Sunday at 11:35 PM

I pointed the request to a server that I control to see how the headers are retrieved

I sent

Request.SetHeader("Content-Type","text/plain")
Request.SetHeader("X-API-Key","api key goes here")

It says I sent

HTTP_X_API_KEY : API key goes here
CONTENT_TYPE : application/x-www-form-urlencoded

timwil · Sunday at 11:49 PM

And from my windows based system

HTTP_X_API_KEY : API key goes here
CONTENT_TYPE : text/plain

so the content type was swapped by okHttp?

Is there a way to override that?

timwil · 2026-03-09T01:35:27+0000

Sorry I am just freaking out

Request.SetContentType("text/plain")

and it works!

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