HTTP status codes provide valuable information about the outcome of the request, and based on these codes, different actions can be taken, such as further retries or error handling. Here we are using Arithmetic Operators to capture all possible 2XX status codes. If a 2XX code is returned, we are treating it as a success and returning the response message. This is typically when you would queue or perform any additional processing on the data. If a code outside of the 2XX series is returned, we are logging an error. This stage is when you have the flexibility to handle the outcome as required - whether that means logging an error to trigger a notification for your team or retrying the original request.
This is a simple example for response handling. You may not want to handle every http status code the same way. In production, you can create your own conditional logic based on your requirements and use the HTTP status codes to guide you: | Code Block |
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| local retryCodes = {
[404] = true, -- Not Found: the resource was not found but may be available in the future
[408] = true, -- Request Timeout: the server timed out probably temporarily overloaded
[503] = true, -- Service Unavailable: temporaily unavailable or overloaded
[429] = true -- Too Many Requests: too many requests or concurrent connections
}
local funcSuccess
-- Parse results and apply simple error, handling according to the API responses
if success then
local R = json.parse{data=response}
-- Check HTTP codes
if code >= 200 and code <300 then
iguana.logMessage(response)
funcSuccess = true -- don't retry
return R, code -- return response for further processing
-- if retryCode returned, funcSuccess = false to retry function call
elseif retryCodes[code] then
iguana.logInfo('Web service connection error: '..tostring(code)..' - '..tostring(errMsg))
funcSuccess = false -- retry
-- in this case we don't want to retry, instead invoke token refresh workflow or check credentials
elseif code == 401 then
iguana.logInfo('Web service connection error: '..tostring(code)..' - refreshing token')
getToken() -- trigger workflow to refresh token
funcSuccess = true -- don't retry
-- any other code can be considered an error
else
-- logError() logs an error message to skip this message and trigger notification rule
-- use error() to stop the component on error
iguana.logError('WebService connection: ERROR '..tostring(code)..' - '..tostring(errMsg))
funcSuccess = true -- don't retry
end
end |
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