Lua

SQS Receive Message

See more Amazon SQS Examples

Retrieves one or more messages from an Amazon SQS queue, with a maximum limit of 10 messages, from the specified queue.

See SQS ReceiveMessage or detailed information.

Lua

local chilkat = require("chilkat")

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

local rest = chilkat.Rest.new()

-- Connect to the Amazon AWS REST server.
-- such as https://sqs.us-west-2.amazonaws.com/
local bTls = true
local port = 443
local bAutoReconnect = true
local success = rest:connect("sqs.us-west-2.amazonaws.com", port, bTls, bAutoReconnect)

-- Provide AWS credentials for the REST call.
local authAws = chilkat.AuthAws.new()
authAws.access_key = "AWS_ACCESS_KEY"
authAws.secret_key = "AWS_SECRET_KEY"
-- the region should match our URL above..
authAws.region = "us-west-2"
authAws.service_name = "sqs"

rest:set_auth_aws(authAws)

rest:add_query_param("Action", "ReceiveMessage")
rest:add_query_param("MaxNumberOfMessages", "5")
rest:add_query_param("VisibilityTimeout", "15")
rest:add_query_param("AttributeName", "All")
rest:add_query_param("MessageAttributeName", "All")

-- Use the actual path part of your SQS queue URL here:
local responseXml = rest:full_request_no_body("GET", "/123456789123/chilkatTest")
if not rest.last_method_success then
    print(rest.last_error_text)
    return
end

-- A successful response will have a status code equal to 200.
if rest.response_status_code ~= 200 then
    print("response status code = " .. rest.response_status_code)
    print("response status text = " .. rest.response_status_text)
    print("response header: " .. rest.response_header)
    print("response body: " .. responseXml)
    return
end

-- Examine the successful XML response.
local xml = chilkat.Xml.new()
xml:load_xml(responseXml)
print(xml:get_xml())
print("----")

-- A successful response looks like this:
-- <?xml version="1.0" encoding="utf-8" ?>
-- <ReceiveMessageResponse xmlns="http://queue.amazonaws.com/doc/2012-11-05/">
--     <ReceiveMessageResult>
--         <Message>
--             <Body>this is a test</Body>
--             <MD5OfBody>54b0c58c7ce9f2a8b551351102ee0938</MD5OfBody>
--             <ReceiptHandle>AQEBMyLof...UbKBTvHtEg==</ReceiptHandle>
--             <Attribute>
--                 <Name>SenderId</Name>
--                 <Value>957491831129</Value>
--             </Attribute>
--             <Attribute>
--                 <Name>ApproximateFirstReceiveTimestamp</Name>
--                 <Value>1475013283557</Value>
--             </Attribute>
--             <Attribute>
--                 <Name>ApproximateReceiveCount</Name>
--                 <Value>4</Value>
--             </Attribute>
--             <Attribute>
--                 <Name>SentTimestamp</Name>
--                 <Value>1475013283557</Value>
--             </Attribute>
--             <MessageId>52882c65-5e21-4450-9024-93a3b01e61d3</MessageId>
--             <MD5OfMessageAttributes>2ff68603f4239272bd03f543254ed040</MD5OfMessageAttributes>
--         </Message>
--     </ReceiveMessageResult>
--     <ResponseMetadata>
--         <RequestId>05ba5c92-80ee-5f87-be76-0cf67b7475d6</RequestId>
--     </ResponseMetadata>
-- </ReceiveMessageResponse>

-- Get some values from the XML:
print("Body: " .. xml:chilkat_path("ReceiveMessageResult|Message|Body|*"))
print("MessageId: " .. xml:chilkat_path("ReceiveMessageResult|Message|MessageId|*"))

local unused = xml:chilkat_path("ReceiveMessageResult|Message[0]|Attribute|$")

local rec = xml:find_next_record("Name", "SenderId")
print("SenderId: " .. rec:get_child_content("Value"))

rec = xml:find_next_record("Name", "ApproximateFirstReceiveTimestamp")
print("ApproximateFirstReceiveTimestamp: " .. rec:get_child_content("Value"))

rec = xml:find_next_record("Name", "ApproximateReceiveCount")
print("ApproximateReceiveCount: " .. rec:get_child_content("Value"))

rec = xml:find_next_record("Name", "SentTimestamp")
print("SentTimestamp: " .. rec:get_child_content("Value"))

xml:get_root2()