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retry_request.go
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/
retry_request.go
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package wrapper
import (
"net/http"
"code.cloudfoundry.org/cli/api/cfnetworking"
)
// RetryRequest is a wrapper that retries failed requests if they contain a 5XX
// status code.
type RetryRequest struct {
maxRetries int
connection cfnetworking.Connection
}
// NewRetryRequest returns a pointer to a RetryRequest wrapper.
func NewRetryRequest(maxRetries int) *RetryRequest {
return &RetryRequest{
maxRetries: maxRetries,
}
}
// Wrap sets the connection in the RetryRequest and returns itself.
func (retry *RetryRequest) Wrap(innerconnection cfnetworking.Connection) cfnetworking.Connection {
retry.connection = innerconnection
return retry
}
// Make retries the request if it comes back with certain status codes.
func (retry *RetryRequest) Make(request *cfnetworking.Request, passedResponse *cfnetworking.Response) error {
var err error
for i := 0; i < retry.maxRetries+1; i += 1 {
err = retry.connection.Make(request, passedResponse)
if err == nil {
return nil
}
if passedResponse.HTTPResponse != nil &&
(passedResponse.HTTPResponse.StatusCode == http.StatusBadGateway ||
passedResponse.HTTPResponse.StatusCode == http.StatusServiceUnavailable ||
passedResponse.HTTPResponse.StatusCode == http.StatusGatewayTimeout ||
(passedResponse.HTTPResponse.StatusCode >= 400 && passedResponse.HTTPResponse.StatusCode < 500)) {
break
}
// Reset the request body prior to the next retry
resetErr := request.ResetBody()
if resetErr != nil {
return resetErr
}
}
return err
}