Visual FoxPro

Azure ServiceBus - Request a Token from ACS

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

LOCAL lnSuccess
LOCAL loHttp
LOCAL loReq
LOCAL lnUseTls
LOCAL loResp
LOCAL lcAccessToken

lnSuccess = 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
* 

loHttp = CreateObject('Chilkat.Http')
loReq = CreateObject('Chilkat.HttpRequest')

* Build the HTTP request...
loReq.HttpVerb = "POST"
loReq.Path = "/WRAPv0.9/"
loReq.ContentType = "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.
loReq.AddHeader("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:
loReq.AddHeader("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.
loReq.AddParam("wrap_name","owner")
loReq.AddParam("wrap_password","r8LuxCKD6DWY8auQcFql4M7euH2UuhcLcV1TaJTqNNE=")
loReq.AddParam("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.
lnUseTls = 1
loResp = CreateObject('Chilkat.HttpResponse')
lnSuccess = loHttp.HttpSReq("your-namespace-sb.accesscontrol.windows.net",443,lnUseTls,loReq,loResp)
IF (lnSuccess = 0) THEN
    ? loHttp.LastErrorText
    RELEASE loHttp
    RELEASE loReq
    RELEASE loResp
    CANCEL
ENDIF

* A successful response will have a status code = 200.
IF (loResp.StatusCode <> 200) THEN
    ? "Response Status Code = " + STR(loResp.StatusCode)
    ? loResp.BodyStr
    ? "Failed."
    RELEASE loHttp
    RELEASE loReq
    RELEASE loResp
    CANCEL
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:
lcAccessToken = loResp.UrlEncParamValue(loResp.BodyStr,"wrap_access_token")

? "Your access token is the following param string:"
? lcAccessToken

RELEASE loHttp
RELEASE loReq
RELEASE loResp