71 lines
1.8 KiB
Go
71 lines
1.8 KiB
Go
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package jws
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import (
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"context"
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"github.com/lestrrat-go/iter/mapiter"
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"github.com/lestrrat-go/jwx/internal/iter"
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"github.com/pkg/errors"
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)
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// Iterate returns a channel that successively returns all the
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// header name and values.
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func (h *stdHeaders) Iterate(ctx context.Context) Iterator {
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pairs := h.makePairs()
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ch := make(chan *HeaderPair, len(pairs))
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go func(ctx context.Context, ch chan *HeaderPair, pairs []*HeaderPair) {
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defer close(ch)
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for _, pair := range pairs {
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select {
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case <-ctx.Done():
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return
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case ch <- pair:
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}
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}
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}(ctx, ch, pairs)
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return mapiter.New(ch)
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}
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func (h *stdHeaders) Walk(ctx context.Context, visitor Visitor) error {
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return iter.WalkMap(ctx, h, visitor)
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}
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func (h *stdHeaders) AsMap(ctx context.Context) (map[string]interface{}, error) {
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return iter.AsMap(ctx, h)
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}
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func (h *stdHeaders) Copy(ctx context.Context, dst Headers) error {
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for iter := h.Iterate(ctx); iter.Next(ctx); {
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pair := iter.Pair()
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if err := dst.Set(pair.Key.(string), pair.Value); err != nil {
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return errors.Wrapf(err, `failed to set header`)
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}
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}
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return nil
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}
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// mergeHeaders merges two headers, and works even if the first Header
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// object is nil. This is not exported because ATM it felt like this
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// function is not frequently used, and MergeHeaders seemed a clunky name
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func mergeHeaders(ctx context.Context, h1, h2 Headers) (Headers, error) {
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h3 := NewHeaders()
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if h1 != nil {
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if err := h1.Copy(ctx, h3); err != nil {
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return nil, errors.Wrap(err, `failed to copy headers from first Header`)
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}
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}
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if h2 != nil {
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if err := h2.Copy(ctx, h3); err != nil {
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return nil, errors.Wrap(err, `failed to copy headers from second Header`)
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}
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}
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return h3, nil
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}
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func (h *stdHeaders) Merge(ctx context.Context, h2 Headers) (Headers, error) {
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return mergeHeaders(ctx, h, h2)
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}
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