API class for calling FES endpoints to upload message to web portal

[tomholub]

part of #955

same as FlowCrypt/flowcrypt-android#1615

[sosnovsky]

@IvanPizhenko I'm trying to upload message to FES server using POST /api/v1/message endpoint, but receive the same Uploaded file doesn't contain a valid PGP message error as in Android task FlowCrypt/flowcrypt-android#1615 (comment)

Here is body of POST request (I added new line after -----END PGP MESSAGE----- as you advised in mentioned task)

--13F50D63-2F56-4239-8B32-7C60DBE7CF87
Content-Disposition: form-data; name="details"
Content-Type: application/json; charset=utf-8
{"associateReplyToken":"reply token","cc":[],"to":["test@flowcrypt.com"],"bcc":[],"from":"test@flowcrypt.com"}
--13F50D63-2F56-4239-8B32-7C60DBE7CF87
Content-Disposition: form-data; name="content"; filename="content"
Content-Type: application/octet-stream
-----BEGIN PGP MESSAGE-----
Version: FlowCrypt iOS 0.2 Gmail Encryption
Comment: Seamlessly send and receive encrypted email
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3D=3D
=3DFfLd
-----END PGP MESSAGE-----

--13F50D63-2F56-4239-8B32-7C60DBE7CF87--

Is anything else should be added there? Thanks

[IvanPizhenko]

@sosnovsky You must send only part starting with -----BEGIN PGP MESSAGE----- and ending with -----END PGP MESSAGE----- (with newline in the end), please make sure you don't add that leading and trailing email related stuff.

[tomholub]

The data as Roman printed it above is the whole form-multipart data. On a casual look, it looks correct to me, and as far as I can see, the pgp part only contains an armored pgp message.

[tomholub]

@sosnovsky you could send a password-encrypted message from the browser extension with the network tab open for debugging. Then right-click the request to FES and choose "export as cURL". Print the export here (with id token redacted), then we can compare the contents.

[tomholub]

@sosnovsky also, what is the error id that you got back?

[sosnovsky]

I was able to make successful request using Postman, but still trying to make it work on iOS - currently receiving such error:

{
  "code" : 400,
  "message" : "Uploaded file doesn\'t contain a valid PGP message",
  "details" : "For more details, see FlowCrypt Enterprise Server logs."
}

[sosnovsky]

It finally works! Thanks for your advices guys
The issue was with missing additional line-break after Content-Type: .., so instead of

Content-Type: application/octet-stream
-----BEGIN PGP MESSAGE-----
...

it should be

Content-Type: application/octet-stream

-----BEGIN PGP MESSAGE-----
...