diff options
Diffstat (limited to 'vendor/github.com/aws/aws-sdk-go/aws/request/timeout_read_closer.go')
-rw-r--r-- | vendor/github.com/aws/aws-sdk-go/aws/request/timeout_read_closer.go | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/vendor/github.com/aws/aws-sdk-go/aws/request/timeout_read_closer.go b/vendor/github.com/aws/aws-sdk-go/aws/request/timeout_read_closer.go new file mode 100644 index 0000000..09a44eb --- /dev/null +++ b/vendor/github.com/aws/aws-sdk-go/aws/request/timeout_read_closer.go @@ -0,0 +1,94 @@ +package request + +import ( + "io" + "time" + + "github.com/aws/aws-sdk-go/aws/awserr" +) + +var timeoutErr = awserr.New( + ErrCodeResponseTimeout, + "read on body has reached the timeout limit", + nil, +) + +type readResult struct { + n int + err error +} + +// timeoutReadCloser will handle body reads that take too long. +// We will return a ErrReadTimeout error if a timeout occurs. +type timeoutReadCloser struct { + reader io.ReadCloser + duration time.Duration +} + +// Read will spin off a goroutine to call the reader's Read method. We will +// select on the timer's channel or the read's channel. Whoever completes first +// will be returned. +func (r *timeoutReadCloser) Read(b []byte) (int, error) { + timer := time.NewTimer(r.duration) + c := make(chan readResult, 1) + + go func() { + n, err := r.reader.Read(b) + timer.Stop() + c <- readResult{n: n, err: err} + }() + + select { + case data := <-c: + return data.n, data.err + case <-timer.C: + return 0, timeoutErr + } +} + +func (r *timeoutReadCloser) Close() error { + return r.reader.Close() +} + +const ( + // HandlerResponseTimeout is what we use to signify the name of the + // response timeout handler. + HandlerResponseTimeout = "ResponseTimeoutHandler" +) + +// adaptToResponseTimeoutError is a handler that will replace any top level error +// to a ErrCodeResponseTimeout, if its child is that. +func adaptToResponseTimeoutError(req *Request) { + if err, ok := req.Error.(awserr.Error); ok { + aerr, ok := err.OrigErr().(awserr.Error) + if ok && aerr.Code() == ErrCodeResponseTimeout { + req.Error = aerr + } + } +} + +// WithResponseReadTimeout is a request option that will wrap the body in a timeout read closer. +// This will allow for per read timeouts. If a timeout occurred, we will return the +// ErrCodeResponseTimeout. +// +// svc.PutObjectWithContext(ctx, params, request.WithTimeoutReadCloser(30 * time.Second) +func WithResponseReadTimeout(duration time.Duration) Option { + return func(r *Request) { + + var timeoutHandler = NamedHandler{ + HandlerResponseTimeout, + func(req *Request) { + req.HTTPResponse.Body = &timeoutReadCloser{ + reader: req.HTTPResponse.Body, + duration: duration, + } + }} + + // remove the handler so we are not stomping over any new durations. + r.Handlers.Send.RemoveByName(HandlerResponseTimeout) + r.Handlers.Send.PushBackNamed(timeoutHandler) + + r.Handlers.Unmarshal.PushBack(adaptToResponseTimeoutError) + r.Handlers.UnmarshalError.PushBack(adaptToResponseTimeoutError) + } +} |