How to read Power Query -> Web.Contents response header?

Question

let
    url = "http://XXXX/Account/Login",
    body = "{""UserName"": ""test""}",
    Source = Json.Document(Web.Contents(url,[          
     Headers = [#"Content-Type"="application/json"],
     Content = Text.ToBinary(body) 
    ]))
in
    Source

How to read the Header value from Source?

Answer 1

There is no way to get response headers. You may get only request headers and some additional information. Use Value.Metadata function

let
    md = Value.Metadata(Web.Contents("https://www.google.com", [Headers=[qwer="asdf"], Query=[q="test"], IsRetry=true]))
in
    md