Source file src/pkg/net/textproto/header.go
1 // Copyright 2010 The Go Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style 3 // license that can be found in the LICENSE file. 4 5 package textproto 6 7 // A MIMEHeader represents a MIME-style header mapping 8 // keys to sets of values. 9 type MIMEHeader map[string][]string 10 11 // Add adds the key, value pair to the header. 12 // It appends to any existing values associated with key. 13 func (h MIMEHeader) Add(key, value string) { 14 key = CanonicalMIMEHeaderKey(key) 15 h[key] = append(h[key], value) 16 } 17 18 // Set sets the header entries associated with key to 19 // the single element value. It replaces any existing 20 // values associated with key. 21 func (h MIMEHeader) Set(key, value string) { 22 h[CanonicalMIMEHeaderKey(key)] = []string{value} 23 } 24 25 // Get gets the first value associated with the given key. 26 // If there are no values associated with the key, Get returns "". 27 // Get is a convenience method. For more complex queries, 28 // access the map directly. 29 func (h MIMEHeader) Get(key string) string { 30 if h == nil { 31 return "" 32 } 33 v := h[CanonicalMIMEHeaderKey(key)] 34 if len(v) == 0 { 35 return "" 36 } 37 return v[0] 38 } 39 40 // Del deletes the values associated with key. 41 func (h MIMEHeader) Del(key string) { 42 delete(h, CanonicalMIMEHeaderKey(key)) 43 }