Accessing a request's body using classic ASP? - json

Question

How do I access what has been posted by a client to my classic ASP server?
I know that there is the Request.Forms variable, but the client's request was not made using a Form.
The client request's body is just a string made using a standard POST statement.
Thanks

Answer 1

You need to read request bytes if content type of request sent by client is not form data. In this case, request is not a form-data that is accessible through name-value pairs so you cannot use Request.Form collection. I suggest investigate the BinaryRead method.
Reading posted data and convert into string :
If Request.TotalBytes > 0 Then
Dim lngBytesCount
lngBytesCount = Request.TotalBytes
Response.Write BytesToStr(Request.BinaryRead(lngBytesCount))
End If
Function BytesToStr(bytes)
Dim Stream
Set Stream = Server.CreateObject("Adodb.Stream")
Stream.Type = 1 'adTypeBinary
Stream.Open
Stream.Write bytes
Stream.Position = 0
Stream.Type = 2 'adTypeText
Stream.Charset = "iso-8859-1"
BytesToStr = Stream.ReadText
Stream.Close
Set Stream = Nothing
End Function
Hope it helps.
Update #1:
With using JScript
if(Request.TotalBytes > 0){
var lngBytesCount = Request.TotalBytes
Response.Write(BytesToStr(Request.BinaryRead(lngBytesCount)))
}
function BytesToStr(bytes){
var stream = Server.CreateObject("Adodb.Stream")
stream.type = 1
stream.open
stream.write(bytes)
stream.position = 0
stream.type = 2
stream.charset = "iso-8859-1"
var sOut = stream.readtext()
stream.close
return sOut
}

Answer 2

To get the JSON string value just use CStr(Request.Form)
Works a treat.

Answer 3

In Classic ASP, Request.Form is the collection used for any data sent via POST.
For the sake of completeness, I'll add that Request.QueryString is the collection used for any data sent via GET/the Query String.
I would guess based on the above that even though the client is not a web browser, the Request.Form collection should be populated.
note: all of this is assuming the data being sent is textual in nature, and that there are no binary uploads (e.g. pictures or files) being sent. Update your question body if this is an incorrect assumption.
To test, write out the raw form data and see what you have - something along the lines of:
Response.Write(Request.Form)
Which with a regular web page will output something like
field=value&field2=value2
If you get something along those lines, you could then use that as a reference for a proper index.
If you do not get something like that, update your question with what you tried and what you got.