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update some of the forked code to use dskit grpcclient and grpcutil s…
…ince #4312 was merged after the original fork was created.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,40 @@ | ||
| package httpgrpc | ||
|
|
||
| import ( | ||
| "github.com/opentracing/opentracing-go" | ||
| "github.com/weaveworks/common/httpgrpc" | ||
| ) | ||
|
|
||
| // Used to transfer trace information from/to HTTP request. | ||
| type HttpgrpcHeadersCarrier httpgrpc.HTTPRequest | ||
|
|
||
| func (c *HttpgrpcHeadersCarrier) Set(key, val string) { | ||
| c.Headers = append(c.Headers, &httpgrpc.Header{ | ||
| Key: key, | ||
| Values: []string{val}, | ||
| }) | ||
| } | ||
|
|
||
| func (c *HttpgrpcHeadersCarrier) ForeachKey(handler func(key, val string) error) error { | ||
| for _, h := range c.Headers { | ||
| for _, v := range h.Values { | ||
| if err := handler(h.Key, v); err != nil { | ||
| return err | ||
| } | ||
| } | ||
| } | ||
| return nil | ||
| } | ||
|
|
||
| func GetParentSpanForRequest(tracer opentracing.Tracer, req *httpgrpc.HTTPRequest) (opentracing.SpanContext, error) { | ||
| if tracer == nil { | ||
| return nil, nil | ||
| } | ||
|
|
||
| carrier := (*HttpgrpcHeadersCarrier)(req) | ||
| extracted, err := tracer.Extract(opentracing.HTTPHeaders, carrier) | ||
| if err == opentracing.ErrSpanContextNotFound { | ||
| err = nil | ||
| } | ||
| return extracted, err | ||
| } |