F#- Getting error HttpFs.Client : “code”:“415”,“message”:“Content type '' not supported”

Question

I am using F# library HttpFs.Client for API Testing. I know that I am doing something wrong by not setting the correct content type in Headers but I don't know how to set it.

[] let Play with Rest API() =

let request = Request.createUrl Post "https://c2c-lms-qa.ninja24.in/login"
               |> Request.setHeader (Accept "application/json")
               |> Request.bodyString ReadFile //Reading content of json body
               |> Request.responseAsString
               |> run

printfn "Here's the Response is : %s" request

In this case, I keep getting an error: {"code":"415","message":"Content type '' not supported","errors":[{"field":null,"message":"Content type '' not supported","rejectedValue":null}]}Here's the Response is : {"code":"415","message":"Content type '' not supported","errors":[{"field":null,"message":"Content type '' not supported","rejectedValue":null}]}

I tried various other ways like bypassing these: a) |> Request.setHeader (ContentType "application/json")

Showing an error: This expression was expected to have type 'ContentType' but here has type 'string' Or

b) |> Request.setHeader (Custom("Content-Type", "application/json"))

System.Exception : Exception raised by job ----> System.InvalidOperationException : Misused header name. Make sure request headers are used with HttpRequestMessage, response headers with HttpResponseMessage, and content headers with HttpContent objects.Result message:

JSON body: { "idToken": "eyJhbGciOiJSUzI1NiIsImtpZCINCwiZXhwIwQHWsiA8A-mm9jZ33VM3BGeBW9CsJmaeZ4P4uTTQ13PKEboXLu7Heik4UNUfyL1xHvjVVPuIiz--gzzXGN76-ReJ5jHoG_l0JauKbJpgap-HE43JqF08c7zBuHFUp9DmjyNlcbZra7TJsMKPVE7oCYPSpbhCRYLyzlms5xBFO5aqL-IPEOnXJbLkXA", "type": "GOOGLE_LOGIN" }

Note* As suggested, I have tried by removing content-type param itself like:

let Play with Rest API() =  
printfn "Body File content is : %s" ReadFile  
let request = Request.createUrl Post "https://c2c-lms-qa.ninja24.in/login”  |> Request.bodyString ReadFile 
|> Request.responseAsString 
|> run   

printfn "Here's the Response is : %s" request

But I am still getting this error: Here's the Response is : {"code":"415","message":"Content type '' not supported","errors":[{"field":null,"message":"Content type '' not supported","rejectedValue":null}]}

To Repro on postman, you can use this data: POST URl: https://c2c-lms-qa.ninja24.in/login Body: {"idToken":"eyJhbGciOiJSUzI1NiKNMULubJGpLSGP4Rjsibf9sQGIFy3cnb46wsn0-L03vNu9LuZidwZ30ZiZ28Jua3jQha__yjmdnqaBrkdSybjz1jOsQ4IwQHWsiA8A-mm9jZ33VM3BGeBW9CsJmaeZ4P4uTTQ13PKEboXLu7Heik4UNUfyL1xHvjVVPuIiz--gzzXGN76-ReJ5jHoG_l0JauKbJpgap-HE43JqF08c7zBuHFUp9DmjyNlcbZra7TJsMKPVE7oCYPSpbhCRYLyzlms5xBFO5aqL-IPEOnXJbLkXA","type":"GOOGLE_LOGIN"}

As I have provided invalid token, you'll see this expected response in Postman: { "code": "401", "message": "Invalid Token", "errors": [ { "field": null, "message": "Invalid Token", "rejectedValue": null } ] }

But on F# library HttpFs.Client, I get this: {"code":"415","message":"Content type '' not supported","errors":[{"field":null,"message":"Content type '' not supported","rejectedValue":null}]}

This is unrelated to F#, your api does not support the content header your passing by. Have you tried removing the content header alltogether. — Koenig Lear
@KoenigLear- Thanks for checking. I have updated my comments where I have tried without content header as you suggested but it's still not working. If possible, please try with the data I provided above. Thanks a lot. — Sanjay Kumar

Koenig Lear Koenig Lear · Accepted Answer · 2020-06-11T14:03:35

The below should fix it. The syntax to pass the content type is a bit akward:

Request.createUrl Post "https://c2c-lms-qa.ninja24.in/login"
|> Request.setHeader (ContentType (ContentType.create("application", "json")))
|> Request.bodyString token //Reading content of json body
|> Request.responseAsString
|> run

F#- Getting error HttpFs.Client : “code”:“415”,“message”:“Content type '' not supported”

1 Answers