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fix: if not kratos context then panic will result (#1338)

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* fix: if not kratos context panic

当ctx不是kratos的context，则app.Name()会导致panic
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Xudong Cai 2021-08-15 17:02:59 +08:00 committed by GitHub
parent 3f68c9a9e0
commit 80378ca10d
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1 changed files with 4 additions and 2 deletions
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6
middleware/tracing/metadata.go
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@ -17,8 +17,10 @@ var _ propagation.TextMapPropagator = Metadata{}
// Inject sets metadata key-values from ctx into the carrier.
func (b Metadata) Inject(ctx context.Context, carrier propagation.TextMapCarrier) {
app, _ := kratos.FromContext(ctx)
carrier.Set(serviceHeader, app.Name())
app, ok := kratos.FromContext(ctx)
if ok {
carrier.Set(serviceHeader, app.Name())
}
}
// Extract returns a copy of parent with the metadata from the carrier added.