69 lines
1.8 KiB
Go
69 lines
1.8 KiB
Go
package responsemodifiers
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import (
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"context"
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"net/http"
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"github.com/containous/traefik/v2/pkg/config/runtime"
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"github.com/containous/traefik/v2/pkg/server/provider"
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)
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// NewBuilder creates a builder.
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func NewBuilder(configs map[string]*runtime.MiddlewareInfo) *Builder {
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return &Builder{configs: configs}
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}
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// Builder holds builder configuration.
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type Builder struct {
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configs map[string]*runtime.MiddlewareInfo
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}
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// Build Builds the response modifier.
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// It returns nil if there is no modifier to apply.
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func (f *Builder) Build(ctx context.Context, names []string) func(*http.Response) error {
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var modifiers []func(*http.Response) error
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for _, middleName := range names {
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conf, ok := f.configs[middleName]
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if !ok {
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getLogger(ctx, middleName, "undefined").Debug("Middleware name not found in config (ResponseModifier)")
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continue
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}
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if conf == nil || conf.Middleware == nil {
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getLogger(ctx, middleName, "undefined").Error("Invalid Middleware configuration (ResponseModifier)")
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continue
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}
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if conf.Headers != nil {
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getLogger(ctx, middleName, "Headers").Debug("Creating Middleware (ResponseModifier)")
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modifiers = append(modifiers, buildHeaders(conf.Headers))
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} else if conf.Chain != nil {
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chainCtx := provider.AddInContext(ctx, middleName)
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getLogger(chainCtx, middleName, "Chain").Debug("Creating Middleware (ResponseModifier)")
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var qualifiedNames []string
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for _, name := range conf.Chain.Middlewares {
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qualifiedNames = append(qualifiedNames, provider.GetQualifiedName(chainCtx, name))
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}
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if rm := f.Build(ctx, qualifiedNames); rm != nil {
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modifiers = append(modifiers, rm)
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}
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}
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}
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if len(modifiers) > 0 {
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return func(resp *http.Response) error {
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for i := len(modifiers); i > 0; i-- {
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err := modifiers[i-1](resp)
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if err != nil {
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return err
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}
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}
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return nil
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}
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}
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return nil
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}
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