// Copyright 2010 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package textproto
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// A MIMEHeader represents a MIME-style header mapping
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// keys to sets of values.
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type MIMEHeader map[string][]string
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// Add adds the key, value pair to the header.
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// It appends to any existing values associated with key.
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func (h MIMEHeader) Add(key, value string) {
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key = CanonicalMIMEHeaderKey(key)
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h[key] = append(h[key], value)
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}
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// Set sets the header entries associated with key to
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// the single element value. It replaces any existing
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// values associated with key.
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func (h MIMEHeader) Set(key, value string) {
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h[CanonicalMIMEHeaderKey(key)] = []string{value}
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}
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// Get gets the first value associated with the given key.
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// It is case insensitive; CanonicalMIMEHeaderKey is used
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// to canonicalize the provided key.
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// If there are no values associated with the key, Get returns "".
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// To access multiple values of a key, or to use non-canonical keys,
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// access the map directly.
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func (h MIMEHeader) Get(key string) string {
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if h == nil {
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return ""
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}
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v := h[CanonicalMIMEHeaderKey(key)]
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if len(v) == 0 {
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return ""
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}
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return v[0]
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}
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// Del deletes the values associated with key.
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func (h MIMEHeader) Del(key string) {
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delete(h, CanonicalMIMEHeaderKey(key))
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}
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