56 lines
1.4 KiB
Go
56 lines
1.4 KiB
Go
package headermodifier
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import (
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"context"
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"net/http"
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"github.com/traefik/traefik/v3/pkg/config/dynamic"
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"github.com/traefik/traefik/v3/pkg/middlewares"
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"go.opentelemetry.io/otel/trace"
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)
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const typeName = "RequestHeaderModifier"
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// requestHeaderModifier is a middleware used to modify the headers of an HTTP request.
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type requestHeaderModifier struct {
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next http.Handler
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name string
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set map[string]string
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add map[string]string
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remove []string
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}
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// NewRequestHeaderModifier creates a new request header modifier middleware.
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func NewRequestHeaderModifier(ctx context.Context, next http.Handler, config dynamic.RequestHeaderModifier, name string) (http.Handler, error) {
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logger := middlewares.GetLogger(ctx, name, typeName)
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logger.Debug().Msg("Creating middleware")
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return &requestHeaderModifier{
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next: next,
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name: name,
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set: config.Set,
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add: config.Add,
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remove: config.Remove,
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}, nil
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}
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func (r *requestHeaderModifier) GetTracingInformation() (string, string, trace.SpanKind) {
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return r.name, typeName, trace.SpanKindUnspecified
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}
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func (r *requestHeaderModifier) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
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for headerName, headerValue := range r.set {
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req.Header.Set(headerName, headerValue)
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}
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for headerName, headerValue := range r.add {
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req.Header.Add(headerName, headerValue)
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}
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for _, headerName := range r.remove {
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req.Header.Del(headerName)
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}
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r.next.ServeHTTP(rw, req)
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}
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