82 lines
2.2 KiB
Go
82 lines
2.2 KiB
Go
// Package headers Middleware based on https://github.com/unrolled/secure.
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package headers
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import (
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"context"
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"errors"
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"net/http"
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"github.com/opentracing/opentracing-go/ext"
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"github.com/traefik/traefik/v2/pkg/config/dynamic"
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"github.com/traefik/traefik/v2/pkg/log"
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"github.com/traefik/traefik/v2/pkg/middlewares"
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"github.com/traefik/traefik/v2/pkg/middlewares/connectionheader"
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"github.com/traefik/traefik/v2/pkg/tracing"
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)
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const (
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typeName = "Headers"
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)
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func handleDeprecation(ctx context.Context, cfg *dynamic.Headers) {
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if cfg.AccessControlAllowOrigin != "" {
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log.FromContext(ctx).Warn("accessControlAllowOrigin is deprecated, please use accessControlAllowOriginList instead.")
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cfg.AccessControlAllowOriginList = append(cfg.AccessControlAllowOriginList, cfg.AccessControlAllowOrigin)
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cfg.AccessControlAllowOrigin = ""
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}
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}
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type headers struct {
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name string
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handler http.Handler
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}
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// New creates a Headers middleware.
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func New(ctx context.Context, next http.Handler, cfg dynamic.Headers, name string) (http.Handler, error) {
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// HeaderMiddleware -> SecureMiddleWare -> next
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mCtx := middlewares.GetLoggerCtx(ctx, name, typeName)
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logger := log.FromContext(mCtx)
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logger.Debug("Creating middleware")
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handleDeprecation(mCtx, &cfg)
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hasSecureHeaders := cfg.HasSecureHeadersDefined()
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hasCustomHeaders := cfg.HasCustomHeadersDefined()
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hasCorsHeaders := cfg.HasCorsHeadersDefined()
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if !hasSecureHeaders && !hasCustomHeaders && !hasCorsHeaders {
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return nil, errors.New("headers configuration not valid")
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}
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var handler http.Handler
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nextHandler := next
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if hasSecureHeaders {
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logger.Debugf("Setting up secureHeaders from %v", cfg)
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handler = newSecure(next, cfg, name)
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nextHandler = handler
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}
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if hasCustomHeaders || hasCorsHeaders {
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logger.Debugf("Setting up customHeaders/Cors from %v", cfg)
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h, err := NewHeader(nextHandler, cfg)
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if err != nil {
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return nil, err
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}
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handler = connectionheader.Remover(h)
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}
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return &headers{
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handler: handler,
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name: name,
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}, nil
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}
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func (h *headers) GetTracingInformation() (string, ext.SpanKindEnum) {
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return h.name, tracing.SpanKindNoneEnum
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}
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func (h *headers) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
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h.handler.ServeHTTP(rw, req)
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}
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