PureBasic

Azure Service Bus - Send Message to Topic

See more Azure Service Bus Examples

Example code showing how to send a message to an Azure Service Bus Topic. PureBasic

IncludeFile "CkStringBuilder.pb"
IncludeFile "CkJsonObject.pb"
IncludeFile "CkRest.pb"

Procedure ChilkatExample()

    success.i = 0

    ; Note: Requires Chilkat v9.5.0.65 or greater.

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

    ; Make the initial connection.
    ; A single REST object, once connected, can be used for many Azure Service Bus REST API calls.
    ; The auto-reconnect indicates that if the already-established HTTPS connection is closed,
    ; then it will be automatically re-established as needed.
    rest.i = CkRest::ckCreate()
    If rest.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    bAutoReconnect.i = 1
    success = CkRest::ckConnect(rest,"<yournamespace>.servicebus.windows.net",443,1,bAutoReconnect)
    If success <> 1
        Debug CkRest::ckLastErrorText(rest)
        CkRest::ckDispose(rest)
        ProcedureReturn
    EndIf

    ; ----------------------------------------------------------------------------------------------
    ; The code above this comment could be placed inside a function/subroutine within the application
    ; because the connection does not need to be made for every request.  Once the connection is made
    ; the app may send many requests..
    ; ----------------------------------------------------------------------------------------------

    ; Let's load a previously computed SAS token and use it.
    ; See Azure Shared Access Signature for an example to genenerate an Azure SAS token.
    sbToken.i = CkStringBuilder::ckCreate()
    If sbToken.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    CkStringBuilder::ckLoadFile(sbToken,"qa_data/tokens/serviceBusSas.txt","utf-8")

    ; Tell the REST object to use the Azure Shared Access Signature for authorization.
    CkStringBuilder::ckPrepend(sbToken,"SharedAccessSignature ")
    CkRest::ckAddHeader(rest,"Authorization",CkStringBuilder::ckGetAsString(sbToken))

    ; ----------------------------------------------------------------------------------------------

    ; The code for sending to a topic is identical to the code sending to a queue.
    ; The only difference is that a topic name (or topic path) is used instead of queue name/path.

    ; Send to a topic named "gilaMonster";
    topicName.s = "gilaMonster"

    ; The HTTP request body contains the content of the message sent to the topic.
    sbRequestBody.i = CkStringBuilder::ckCreate()
    If sbRequestBody.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    CkStringBuilder::ckAppend(sbRequestBody,"Hello, I'm a gila monster!")

    ; Build the path..
    sbPath.i = CkStringBuilder::ckCreate()
    If sbPath.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    CkStringBuilder::ckAppend(sbPath,"/")
    CkStringBuilder::ckAppend(sbPath,topicName)
    CkStringBuilder::ckAppend(sbPath,"/messages")

    ; Add timeout and api-version query parameters.
    CkRest::ckAddQueryParam(rest,"timeout","20")
    CkRest::ckAddQueryParam(rest,"api-version","2013-08")

    ; Standard brokered message properties are placed in a BrokerProperties HTTP header. 
    ; The broker properties must be serialized in JSON format. To specify a TimeToLive value of 3600 seconds 
    ; and to add a message label "M1" to the message..
    json.i = CkJsonObject::ckCreate()
    If json.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    CkJsonObject::ckAppendInt(json,"TimeToLive",3600)
    CkJsonObject::ckAppendString(json,"Label","A123")
    CkRest::ckAddHeader(rest,"BrokerProperties",CkJsonObject::ckEmit(json))

    ; To add custom properties, such as "Priority" and "Color"
    CkRest::ckAddHeader(rest,"Priority","High")
    CkRest::ckAddHeader(rest,"Color","pink")

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

    success = CkRest::ckFullRequestSb(rest,"POST",CkStringBuilder::ckGetAsString(sbPath),sbRequestBody,sbResponseBody)
    If success <> 1
        Debug CkRest::ckLastErrorText(rest)
        CkRest::ckDispose(rest)
        CkStringBuilder::ckDispose(sbToken)
        CkStringBuilder::ckDispose(sbRequestBody)
        CkStringBuilder::ckDispose(sbPath)
        CkJsonObject::ckDispose(json)
        CkStringBuilder::ckDispose(sbResponseBody)
        ProcedureReturn
    EndIf

    Debug "Response Status Code = " + Str(CkRest::ckResponseStatusCode(rest))

    ; Check for a success response.
    If CkRest::ckResponseStatusCode(rest) <> 201
        Debug CkRest::ckLastRequestStartLine(rest)
        Debug CkRest::ckLastRequestHeader(rest)
        Debug CkStringBuilder::ckGetAsString(sbResponseBody)
        Debug "Failed."
        CkRest::ckDispose(rest)
        CkStringBuilder::ckDispose(sbToken)
        CkStringBuilder::ckDispose(sbRequestBody)
        CkStringBuilder::ckDispose(sbPath)
        CkJsonObject::ckDispose(json)
        CkStringBuilder::ckDispose(sbResponseBody)
        ProcedureReturn
    EndIf

    ; If successful, the 201 response will have no response body.

    Debug "Success."


    CkRest::ckDispose(rest)
    CkStringBuilder::ckDispose(sbToken)
    CkStringBuilder::ckDispose(sbRequestBody)
    CkStringBuilder::ckDispose(sbPath)
    CkJsonObject::ckDispose(json)
    CkStringBuilder::ckDispose(sbResponseBody)


    ProcedureReturn
EndProcedure