diff options
Diffstat (limited to 'workhorse/internal/helper/context_reader.go')
-rw-r--r-- | workhorse/internal/helper/context_reader.go | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/workhorse/internal/helper/context_reader.go b/workhorse/internal/helper/context_reader.go new file mode 100644 index 00000000000..a4764043147 --- /dev/null +++ b/workhorse/internal/helper/context_reader.go @@ -0,0 +1,40 @@ +package helper + +import ( + "context" + "io" +) + +type ContextReader struct { + ctx context.Context + underlyingReader io.Reader +} + +func NewContextReader(ctx context.Context, underlyingReader io.Reader) *ContextReader { + return &ContextReader{ + ctx: ctx, + underlyingReader: underlyingReader, + } +} + +func (r *ContextReader) Read(b []byte) (int, error) { + if r.canceled() { + return 0, r.err() + } + + n, err := r.underlyingReader.Read(b) + + if r.canceled() { + err = r.err() + } + + return n, err +} + +func (r *ContextReader) canceled() bool { + return r.err() != nil +} + +func (r *ContextReader) err() error { + return r.ctx.Err() +} |