PureBasic

Azure ServiceBus - Request a Token from ACS

This example duplicates the HTTP POST described at Request a Token from ACS. PureBasic

IncludeFile "CkHttpResponse.pb"
IncludeFile "CkHttp.pb"
IncludeFile "CkHttpRequest.pb"

Procedure ChilkatExample()

    success.i = 0

    ; This example assumes the Chilkat HTTP API to have been previously unlocked.
    ; See Global Unlock Sample for sample code.

    ; The goal of this example is to send the following HTTP POST:

    ; POST https://your-namespace-sb.accesscontrol.windows.net/WRAPv0.9/ HTTP/1.1  
    ; Content-Type: application/x-www-form-urlencoded  
    ; Host: your-namespace-sb.accesscontrol.windows.net  
    ; Content-Length: 136  
    ; Expect: 100-continue  
    ; Connection: Keep-Alive  
    ; 
    ; wrap_name=owner&wrap_password=r8LuxCKD6DWY8auQcFql4M7euH2UuhcLcV1TaJTqNNE%3d&wrap_scope=http%3a%2f%2fyour-namespace.servicebus.windows.net%2f
    ; 

    http.i = CkHttp::ckCreate()
    If http.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    req.i = CkHttpRequest::ckCreate()
    If req.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    ; Build the HTTP request...
    CkHttpRequest::setCkHttpVerb(req, "POST")
    CkHttpRequest::setCkPath(req, "/WRAPv0.9/")
    CkHttpRequest::setCkContentType(req, "application/x-www-form-urlencoded")

    ; Adding the Connection: Keep-Alive is optional.  It only makes sense if the intent is to send
    ; additional requests to the same domain (your-namespace-sb.accesscontrol.windows.net) within a reasonable time period.
    CkHttpRequest::ckAddHeader(req,"Connection","Keep-Alive")

    ; The Expect: 100-continue really isn't necessary.  This only makes sense when a response is large.  The "100-continue"
    ; provides a means for the HTTP server to alert the HTTP client that the request failed before sending the full response.
    ; In this case, the response size is small, so there's no real need to bother with an "Expect: 100-continue".
    ; If desired, it would be added just like any request header:
    CkHttpRequest::ckAddHeader(req,"Expect","100-continue")

    ; Note: The following headers are automatically added by Chilkat:  Content-Type, Host, Content-Length.
    ; The application should NOT set these directly.

    ; Add the query parameters
    ; When URL decoded and split, the query params look like this:
    ; 
    ; 	wrap_name=owner
    ; 	wrap_password=r8LuxCKD6DWY8auQcFql4M7euH2UuhcLcV1TaJTqNNE=
    ; 	wrap_scope=http://your-namespace.servicebus.windows.net/

    ; Pass the URL-decoded values to AddParam.
    CkHttpRequest::ckAddParam(req,"wrap_name","owner")
    CkHttpRequest::ckAddParam(req,"wrap_password","r8LuxCKD6DWY8auQcFql4M7euH2UuhcLcV1TaJTqNNE=")
    CkHttpRequest::ckAddParam(req,"wrap_scope","http://your-namespace.servicebus.windows.net/")

    ; OK.. our request is properly setup.  Now send to the web server at your-namespace-sb.accesscontrol.windows.net.
    ; We want https (i.e. SSL/TLS), so the port would be 443.
    useTls.i = 1
    resp.i = CkHttpResponse::ckCreate()
    If resp.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    success = CkHttp::ckHttpSReq(http,"your-namespace-sb.accesscontrol.windows.net",443,useTls,req,resp)
    If success = 0
        Debug CkHttp::ckLastErrorText(http)
        CkHttp::ckDispose(http)
        CkHttpRequest::ckDispose(req)
        CkHttpResponse::ckDispose(resp)
        ProcedureReturn
    EndIf

    ; A successful response will have a status code = 200.
    If CkHttpResponse::ckStatusCode(resp) <> 200
        Debug "Response Status Code = " + Str(CkHttpResponse::ckStatusCode(resp))
        Debug CkHttpResponse::ckBodyStr(resp)
        Debug "Failed."
        CkHttp::ckDispose(http)
        CkHttpRequest::ckDispose(req)
        CkHttpResponse::ckDispose(resp)
        ProcedureReturn
    EndIf

    ; A successful response will contain a URL encoded param string such as the following:

    ; 	wrap_access_token=net.windows.servicebus.action%3d
    ; 	Listen%252cManage%252cSend%26
    ; 	http%253a%252f%252fschemas.microsoft.com%252faccesscontrolservice%252f2010%252f07%252fclaims%252fidentityprovider%3d
    ; 	https%253a%252f%252fyour-namespace-sb.accesscontrol.windows.net%252f%26
    ; 	Audience%3dhttp%253a%252f%252fyour-namespace.servicebus.windows.net%252f%26
    ; 	ExpiresOn%3d1404435127%26
    ; 	Issuer%3dhttps%253a%252f%252fyour-namespace-sb.accesscontrol.windows.net%252f%26
    ; 	HMACSHA256%3dF%252bBoXUoifWdT%252fly8Oic9V1oPBbc3KmXKbSJbVhGSopU%253d&
    ; 	wrap_access_token_expires_in=10799
    ; 

    ; The UrlEncParamValue method can be used to extract individual param values by name.
    ; There are two params in the response: wrap_access_token and wrap_access_token_expires.
    ; (It's a bit confusing because the value of the wrap_access_token is itself a URL encoded 
    ; param string.)

    ; Get the access token from the response:
    accessToken.s = CkHttpResponse::ckUrlEncParamValue(resp,CkHttpResponse::ckBodyStr(resp),"wrap_access_token")

    Debug "Your access token is the following param string:"
    Debug accessToken


    CkHttp::ckDispose(http)
    CkHttpRequest::ckDispose(req)
    CkHttpResponse::ckDispose(resp)


    ProcedureReturn
EndProcedure