refactor: change api routes to use a wrapped version of the request context

Bumps [github.com/aws/aws-sdk-go](https://github.com/aws/aws-sdk-go) from 1.44.273 to 1.44.275.
- [Release notes](https://github.com/aws/aws-sdk-go/releases)
- [Commits](https://github.com/aws/aws-sdk-go/compare/v1.44.273...v1.44.275)

---
updated-dependencies:
- dependency-name: github.com/aws/aws-sdk-go
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

go.mod

@@ -8,7 +8,7 @@ go 1.16
 require (
 	cloud.google.com/go/storage v1.30.1
 	github.com/Azure/azure-storage-blob-go v0.14.0
-	github.com/aws/aws-sdk-go v1.44.273
+	github.com/aws/aws-sdk-go v1.44.275
 	github.com/bmizerany/pat v0.0.0-20170815010413-6226ea591a40
 	github.com/golang/mock v1.6.0
 	github.com/golang/protobuf v1.5.3

go.sum

@@ -636,8 +636,8 @@ github.com/antihax/optional v1.0.0/go.mod h1:uupD/76wgC+ih3iEmQUL+0Ugr19nfwCT1kd
 github.com/apache/arrow/go/v10 v10.0.1/go.mod h1:YvhnlEePVnBS4+0z3fhPfUy7W1Ikj0Ih0vcRo/gZ1M0=
 github.com/apache/arrow/go/v11 v11.0.0/go.mod h1:Eg5OsL5H+e299f7u5ssuXsuHQVEGC4xei5aX110hRiI=
 github.com/apache/thrift v0.16.0/go.mod h1:PHK3hniurgQaNMZYaCLEqXKsYK8upmhPbmdP2FXSqgU=
-github.com/aws/aws-sdk-go v1.44.273 h1:CX8O0gK+cGrgUyv7bgJ6QQP9mQg7u5mweHdNzULH47c=
-github.com/aws/aws-sdk-go v1.44.273/go.mod h1:aVsgQcEevwlmQ7qHE9I3h+dtQgpqhFB+i8Phjh7fkwI=
+github.com/aws/aws-sdk-go v1.44.275 h1:VqRULgqrigvQLll4e4hXuc568EQAtZQ6jmBzLlQHzSI=
+github.com/aws/aws-sdk-go v1.44.275/go.mod h1:aVsgQcEevwlmQ7qHE9I3h+dtQgpqhFB+i8Phjh7fkwI=
 github.com/benbjohnson/clock v1.1.0/go.mod h1:J11/hYXuz8f4ySSvYwY0FKfm+ezbsZBKZxNJlLklBHA=
 github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24TaqPxmxbtue+5NUziq4I4S80YR8gNf3Q=
 github.com/beorn7/perks v1.0.0/go.mod h1:KWe93zE9D1o94FZ5RNwFwVgaQK1VOXiVxmqh+CedLV8=

pkg/handler/unrouted_handler.go

@@ -53,6 +53,24 @@ func NewHTTPError(err error, statusCode int) HTTPError {
 	return httpError{err, statusCode}
 }
 
+type contextWithValues struct {
+	context.Context
+	valueHolder context.Context
+}
+
+func (c contextWithValues) Value(key interface{}) interface{} {
+	return c.valueHolder.Value(key)
+}
+
+func newContextWithValues(ctx context.Context) contextWithValues {
+	return contextWithValues{
+		// Use background to not get cancel event
+		Context: context.Background(),
+		// Use request context to get stored values
+		valueHolder: ctx,
+	}
+}
+
 var (
 	ErrUnsupportedVersion               = NewHTTPError(errors.New("unsupported version"), http.StatusPreconditionFailed)
 	ErrMaxSizeExceeded                  = NewHTTPError(errors.New("maximum size exceeded"), http.StatusRequestEntityTooLarge)
@@ -290,7 +308,7 @@ func (handler *UnroutedHandler) Middleware(h http.Handler) http.Handler {
 // PostFile creates a new file upload using the datastore after validating the
 // length and parsing the metadata.
 func (handler *UnroutedHandler) PostFile(w http.ResponseWriter, r *http.Request) {
-	ctx := context.Background()
+	ctx := newContextWithValues(r.Context())
 
 	// Check for presence of application/offset+octet-stream. If another content
 	// type is defined, it will be ignored and treated as none was set because
@@ -433,7 +451,7 @@ func (handler *UnroutedHandler) PostFile(w http.ResponseWriter, r *http.Request)
 
 // HeadFile returns the length and offset for the HEAD request
 func (handler *UnroutedHandler) HeadFile(w http.ResponseWriter, r *http.Request) {
-	ctx := context.Background()
+	ctx := newContextWithValues(r.Context())
 
 	id, err := extractIDFromPath(r.URL.Path)
 	if err != nil {
@@ -498,7 +516,7 @@ func (handler *UnroutedHandler) HeadFile(w http.ResponseWriter, r *http.Request)
 // PatchFile adds a chunk to an upload. This operation is only allowed
 // if enough space in the upload is left.
 func (handler *UnroutedHandler) PatchFile(w http.ResponseWriter, r *http.Request) {
-	ctx := context.Background()
+	ctx := newContextWithValues(r.Context())
 
 	// Check for presence of application/offset+octet-stream
 	if r.Header.Get("Content-Type") != "application/offset+octet-stream" {
@@ -727,7 +745,7 @@ func (handler *UnroutedHandler) finishUploadIfComplete(ctx context.Context, uplo
 // GetFile handles requests to download a file using a GET request. This is not
 // part of the specification.
 func (handler *UnroutedHandler) GetFile(w http.ResponseWriter, r *http.Request) {
-	ctx := context.Background()
+	ctx := newContextWithValues(r.Context())
 
 	id, err := extractIDFromPath(r.URL.Path)
 	if err != nil {
@@ -848,7 +866,7 @@ func filterContentType(info FileInfo) (contentType string, contentDisposition st
 
 // DelFile terminates an upload permanently.
 func (handler *UnroutedHandler) DelFile(w http.ResponseWriter, r *http.Request) {
-	ctx := context.Background()
+	ctx := newContextWithValues(r.Context())
 
 	// Abort the request handling if the required interface is not implemented
 	if !handler.composer.UsesTerminater {