58 lines
1.3 KiB
Go
58 lines
1.3 KiB
Go
package wrapper
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import (
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"context"
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"github.com/micro/go-micro/client"
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"github.com/micro/go-micro/metadata"
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)
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type clientWrapper struct {
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client.Client
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headers metadata.Metadata
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}
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var (
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HeaderPrefix = "Micro-"
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)
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func (c *clientWrapper) setHeaders(ctx context.Context) context.Context {
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// copy metadata
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mda, _ := metadata.FromContext(ctx)
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md := metadata.Copy(mda)
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// set headers
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for k, v := range c.headers {
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if _, ok := md[k]; !ok {
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md[k] = v
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}
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}
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return metadata.NewContext(ctx, md)
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}
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func (c *clientWrapper) Call(ctx context.Context, req client.Request, rsp interface{}, opts ...client.CallOption) error {
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ctx = c.setHeaders(ctx)
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return c.Client.Call(ctx, req, rsp, opts...)
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}
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func (c *clientWrapper) Stream(ctx context.Context, req client.Request, opts ...client.CallOption) (client.Stream, error) {
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ctx = c.setHeaders(ctx)
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return c.Client.Stream(ctx, req, opts...)
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}
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func (c *clientWrapper) Publish(ctx context.Context, p client.Message, opts ...client.PublishOption) error {
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ctx = c.setHeaders(ctx)
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return c.Client.Publish(ctx, p, opts...)
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}
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// FromService wraps a client to inject From-Service header into metadata
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func FromService(name string, c client.Client) client.Client {
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return &clientWrapper{
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c,
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metadata.Metadata{
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HeaderPrefix + "From-Service": name,
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},
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}
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}
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