5XX Retry Logic Best Practices - Go
Review best practices to deal with 5XX errors in Go
Method 1 - Using retry:
Check out this Awesome Github repo for more details and pseudo code - Here
Simple Go Lang. Library for retry mechanism - Check Here
Method 2 - Using go-retryablehttp
The retryablehttp
package provides a familiar HTTP client interface with automatic retries and exponential backoff. It is a thin wrapper over the standard net/http
client library and exposes nearly the same public API. This makes retryablehttp
very easy to drop into existing programs.
retryablehttp
Performs automatic retries under certain conditions. Mainly, if an error is returned by the client (connection errors, etc.), or if a 500-range response code is received (except 501), then a retry is invoked after a wait period. Otherwise, the response is returned and left to the caller to interpret.
The main difference from net/http
is that requests which take a request body (POST/PUT et. al) can have the body provided in a number of ways (some more or less efficient) that allow "rewinding" the request body if the initial request fails so that the full request can be attempted again.
Example Use
Using this library should look almost identical to what you would do with net/http
. The most simple example of a GET request is shown below:
The returned response object is an *http.Response
the same thing you would usually get from net/http
. Had the request failed one or more times, the above call would block and retry with exponential backoff.
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