Forum Discussion

jbrave's avatar
jbrave
Channel Surfer
15 years ago

Bug? getResponseHeadersArray(string feature)

According to the manual the correct syntax for getResponseHeadersArray is to have a string in the ().

Object GetResponseHeadersArray(String feature) 
•  Returns an roArray of roAssociativeArrays. Each associative array contains a single 
header name/value pair.


However any string I put in there gives me:

Member function not found in BrightScript Component or interface.

I was hoping I could get just one set of response headers, Set-Cookie (of which there are quite a few) instead of 58 headers which I will need to iterate through looking for that one Set-Cookie that contains the string I'm looking for. If it did work properly, I would still have to do some iteration, just not as much.

Seems that it only works with () instead of ("Set-Cookie") or any other text.

Documentation is on page 97 of the 2.7 SDK Component reference.

- Joel
Roku Developer Program

5 Replies

  • TheEndless's avatar
    TheEndless
    Channel Surfer
    15 years ago
    Are there multiple "Set-Cookie" headers in the response? If not, you could just use the getResponseHeaders() method and access it directly.

    I have a feeling the "String features" parameter is a copy/paste error.
  • TheEndless's avatar
    TheEndless
    Channel Surfer
    15 years ago
    If it helps, here's a function I wrote for one of my channels...
    Function GetCookieValueFromHeaders( cookieName As String, headersArray As Object ) As String
    	cookieValue = ""
    	For Each header in headersArray
    		If header[ "Set-Cookie" ] <> invalid And header[ "Set-Cookie" ].InStr( cookieName + "=" ) = 0 Then
    			cookieValue = header[ "Set-Cookie" ].Mid( cookieName.Len() + 1 )
    			cookieValue = cookieValue.Mid( 0, cookieValue.InStr( ";" ) )
    			Exit For
    		End If
    	Next
    	Return cookieValue
    End Function
  • jbrave's avatar
    jbrave
    Channel Surfer
    15 years ago
    Great timing!

    works perfectly. Now to the question of why it works:

    header["Set-Cookie"]

    I didn't know you could do a lookup with an AssociativeArray using that notation! Yeah, it's on page 12 of the component reference...

    Notatonal weirdness:

    BrightScript Debugger> ?"hello world".instr("hello")
    0
    BrightScript Debugger> ?instr("hello world","hello")
    1

    instr is zero-based in first context, one based in the second context!

    cookieValue = header[ "Set-Cookie" ].Mid( cookieName.Len() + 1 )
    snip off the cookee name
    cookieValue = cookieValue.Mid( 0, cookieValue.InStr( ";" ) )
    snip off the string after the end of the cookie value and it's good to go!

    I just came across this section of the Roku component reference earlier today (page 15/16 in 2.7), had never tried to use these functions in that way before today, synchronicity!

    Thanks for your help!

    - Joel
  • TheEndless's avatar
    TheEndless
    Channel Surfer
    15 years ago
    Funny... When I posted it, I said to myself, "I should probably put comments in here", but I'm far too lazy for that... 😉

    There was a thread awhile back about the differences between the standalone versions of InStr and the instance versions (I think it's the same for Mid as well). If I had to guess, I'd say Roku went that route for familiarity for developers. For example, in VBScript InStr() is 1 based, whereas in VB.Net the .InStr() method is 0 based, so, if you're used to using VBScript, a 0 based InStr standalone function might confuse you, and vice versa if you used to using .Net. Total speculation, but it seems like a reasonable explanation to me...