B4X

Get a REST Response Header by Name

Demonstrates Rest.ResponseHdrByName, which returns the value of a response header field by name. Header field names are case-insensitive.

Background. Response headers are available after ReadResponseHeader has read the status line and headers. Lookup by name is convenient when a specific header, such as Content-Type, is needed.

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B4X

Dim success As Boolean = False

Dim rest As ChilkatRest
rest.Initialize("rest")
Dim bTls As Boolean = True
Dim bAutoReconnect As Boolean = True
success = rest.Connect("example.com", 443, bTls, bAutoReconnect)
If success = False Then
    Log(rest.LastErrorText)
    Return
End If


success = rest.SendReqNoBody("GET", "/api/items/123")
If success = False Then
    Log(rest.LastErrorText)
    Return
End If


Dim statusCode As Int = rest.ReadResponseHeader
If statusCode < 0 Then
    Log(rest.LastErrorText)
    Return
End If


'  Return the value of a response header field by name.  Header field names are case-insensitive.
Dim contentType As String = rest.ResponseHdrByName("Content-Type")
If rest.LastMethodSuccess = False Then
    Log(rest.LastErrorText)
    Return
End If

Log("Content-Type: " & contentType)