Golang Request.ParamsFilled方法代码示例

// Build builds a JSON payload for a JSON RPC request.
func Build(req *request.Request) {
	var buf []byte
	var err error
	if req.ParamsFilled() {
		buf, err = jsonutil.BuildJSON(req.Params)
		if err != nil {
			req.Error = awserr.New("SerializationError", "failed encoding JSON RPC request", err)
			return
		}
	} else {
		buf = emptyJSON
	}

	if req.ClientInfo.TargetPrefix != "" || string(buf) != "{}" {
		req.SetBufferBody(buf)
	}

	if req.ClientInfo.TargetPrefix != "" {
		target := req.ClientInfo.TargetPrefix + "." + req.Operation.Name
		req.HTTPRequest.Header.Add("X-Amz-Target", target)
	}
	if req.ClientInfo.JSONVersion != "" {
		jsonVersion := req.ClientInfo.JSONVersion
		req.HTTPRequest.Header.Add("Content-Type", "application/x-amz-json-"+jsonVersion)
	}
}

// Build builds the REST component of a service request.
func Build(r *request.Request) {
	if r.ParamsFilled() {
		v := reflect.ValueOf(r.Params).Elem()
		buildLocationElements(r, v)
		buildBody(r, v)
	}
}

func populateLocationConstraint(r *request.Request) {
	if r.ParamsFilled() && aws.StringValue(r.Config.Region) != "us-east-1" {
		in := r.Params.(*CreateBucketInput)
		if in.CreateBucketConfiguration == nil {
			r.Params = awsutil.CopyOf(r.Params)
			in = r.Params.(*CreateBucketInput)
			in.CreateBucketConfiguration = &CreateBucketConfiguration{
				LocationConstraint: r.Config.Region,
			}
		}
	}
}

func fillPresignedURL(r *request.Request) {
	if !r.ParamsFilled() {
		return
	}

	origParams := r.Params.(*CopySnapshotInput)

	// Stop if PresignedURL/DestinationRegion is set
	if origParams.PresignedUrl != nil || origParams.DestinationRegion != nil {
		return
	}

	origParams.DestinationRegion = r.Config.Region
	newParams := awsutil.CopyOf(r.Params).(*CopySnapshotInput)

	// Create a new request based on the existing request. We will use this to
	// presign the CopySnapshot request against the source region.
	cfg := r.Config.Copy(aws.NewConfig().
		WithEndpoint("").
		WithRegion(aws.StringValue(origParams.SourceRegion)))

	clientInfo := r.ClientInfo
	clientInfo.Endpoint, clientInfo.SigningRegion = endpoints.EndpointForRegion(
		clientInfo.ServiceName, aws.StringValue(cfg.Region), aws.BoolValue(cfg.DisableSSL))

	// Presign a CopySnapshot request with modified params
	req := request.New(*cfg, clientInfo, r.Handlers, r.Retryer, r.Operation, newParams, r.Data)
	url, err := req.Presign(5 * time.Minute) // 5 minutes should be enough.
	if err != nil {                          // bubble error back up to original request
		r.Error = err
		return
	}

	// We have our URL, set it on params
	origParams.PresignedUrl = &url
}