59 lines
1.5 KiB
Go
59 lines
1.5 KiB
Go
package contenttype
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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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)
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const (
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typeName = "ContentType"
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)
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// ContentType is a middleware used to activate Content-Type auto-detection.
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type contentType struct {
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next http.Handler
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name string
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}
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// New creates a new handler.
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func New(ctx context.Context, next http.Handler, config dynamic.ContentType, 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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if config.AutoDetect != nil {
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logger.Warn().Msg("AutoDetect option is deprecated, Content-Type middleware is only meant to be used to enable the content-type detection, please remove any usage of this option.")
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// Disable content-type detection (idempotent).
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if !*config.AutoDetect {
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return next, nil
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}
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}
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return &contentType{next: next, name: name}, nil
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}
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func (c *contentType) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
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// Re-enable auto-detection.
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if ct, ok := rw.Header()["Content-Type"]; ok && ct == nil {
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middlewares.GetLogger(req.Context(), c.name, typeName).
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Debug().Msg("Enable Content-Type auto-detection.")
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delete(rw.Header(), "Content-Type")
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}
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c.next.ServeHTTP(rw, req)
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}
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func DisableAutoDetection(next http.Handler) http.HandlerFunc {
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return func(rw http.ResponseWriter, req *http.Request) {
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// Prevent Content-Type auto-detection.
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if _, ok := rw.Header()["Content-Type"]; !ok {
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rw.Header()["Content-Type"] = nil
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}
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next.ServeHTTP(rw, req)
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}
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}
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