http

Documentation

Index

• func WrapClient(c *http.Client, on string) *http.Client
• func WrapExternalClient(c *http.Client, on string) *http.Client

Examples

• WrapClient
• WrapExternalClient

Functions

func WrapClient

func WrapClient(c *http.Client, on string) *http.Client

WrapClient wraps http.Client to inject opentracing span to outgoing call if and only if root span exists in request context.

Example

client := WrapClient(&http.Client{}, "span.name")

span := opentracing.StartSpan("test_call")
defer span.Finish()

req, _ := http.NewRequest(http.MethodGet, "http://localhost/test", nil)
opentracing.GlobalTracer().Inject(
	span.Context(),
	opentracing.HTTPHeaders,
	opentracing.HTTPHeadersCarrier(req.Header))

client.Do(req)

func WrapExternalClient

func WrapExternalClient(c *http.Client, on string) *http.Client

WrapExternalClient wraps http.Client with tracing and creates opentracing span to outgoing calls, if and only if context of request contains root span. default operation name for that span is http.request

Example

client := WrapExternalClient(&http.Client{}, "external_call")

span := opentracing.StartSpan("test_call")
defer span.Finish()

req, _ := http.NewRequest(http.MethodGet, "http://localhost/test", nil)
ctx := opentracing.ContextWithSpan(context.TODO(), span)

client.Do(req.WithContext(ctx))