(Perl) Azure Service Bus - Delete Message

See more Azure Service Bus Examples

Deletes a message from a queue or subscription.

For more information, see https://docs.microsoft.com/en-us/rest/api/servicebus/unlock-message

Chilkat Perl Downloads Perl Module for Windows, MacOS, Linux, Alpine Linux, Solaris

use chilkat();

# 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 = chilkat::CkRest->new();
$bAutoReconnect = 1;
$success = $rest->Connect("<yournamespace>.servicebus.windows.net",443,1,$bAutoReconnect);
if ($success != 1) {
    print $rest->lastErrorText() . "\r\n";
    exit;
}

# 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 = chilkat::CkStringBuilder->new();
$sbToken->LoadFile("qa_data/tokens/serviceBusSas.txt","utf-8");

# Tell the REST object to use the Azure Shared Access Signature for authorization.
$sbToken->Prepend("SharedAccessSignature ");
$rest->AddHeader("Authorization",$sbToken->getAsString());

# ----------------------------------------------------------------------------------------------
# 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..
# ----------------------------------------------------------------------------------------------

# To delete a message, we'll need either the SequenceNumber or MessageId.
# When the message was peek-locked, the SequenceNumber and MessageId of the locked message
# was returned in the HTTP response header named "BrokerProperties, which contained
# JSON such as the following:
# 
# 	{
# 	  "DeliveryCount": 1,
# 	  "EnqueuedSequenceNumber": 3000004,
# 	  "EnqueuedTimeUtc": "Wed, 07 Dec 2016 17:42:48 GMT",
# 	  "Label": "M3",
# 	  "LockToken": "6eeee205-e541-4cb6-95fb-4c81da5f6858",
# 	  "LockedUntilUtc": "Thu, 08 Dec 2016 00:57:32 GMT",
# 	  "MessageId": "e8028116d63c43f191577f2789b1cca7",
# 	  "SequenceNumber": 4,
# 	  "State": "Active",
# 	  "TimeToLive": 922337193600
# 	}
# 
# 
# The path for unlocking a message is constructed as follows, depending on
# whether it is a message on a queue or subscription:
# 
# (for a queue)
# /{queuePath}/messages/{messageId|sequenceNumber}/{lockToken}
# 
# (for a subscription)
# /{topicPath}/subscriptions/{subscriptionName}/messages/{messageId|sequenceNumber}/{lockToken}

# This example will build a path to delete a message contained in a subscription.
$topicName = "gilaMonster";
$subscriptionName = "feedings";
$messageId = "e8028116d63c43f191577f2789b1cca7";
$lockToken = "6eeee205-e541-4cb6-95fb-4c81da5f6858";

# Build the path..
$sbPath = chilkat::CkStringBuilder->new();
$sbPath->Append("/{topicPath}/subscriptions/{subscriptionName}/messages/{messageId|sequenceNumber}/{lockToken}");
$numReplaced = $sbPath->Replace("{topicPath}",$topicName);
$numReplaced = $sbPath->Replace("{subscriptionName}",$subscriptionName);
$numReplaced = $sbPath->Replace("{messageId|sequenceNumber}",$messageId);
$numReplaced = $sbPath->Replace("{lockToken}",$lockToken);

# Add a timeout parameter.
$rest->AddQueryParam("timeout","20");

# Use the DELETE HTTP verb to delete the message.
$sbResponseBody = chilkat::CkStringBuilder->new();
$success = $rest->FullRequestNoBodySb("DELETE",$sbPath->getAsString(),$sbResponseBody);
if ($success != 1) {
    print $rest->lastErrorText() . "\r\n";
    exit;
}

print "Response Status Code = " . $rest->get_ResponseStatusCode() . "\r\n";

# Check for a success response.
if ($rest->get_ResponseStatusCode() != 200) {
    print $rest->lastRequestStartLine() . "\r\n";
    print $rest->lastRequestHeader() . "\r\n";
    print $sbResponseBody->getAsString() . "\r\n";
    print "Failed." . "\r\n";
    exit;
}

# If successful, the response body would be empty..
print "Success." . "\r\n";