golang header 代码
文件路径：/src/net/textproto/header.go
/ Copyright 2010 The Go Authors. All rights reserved.
/ Use of this source code is governed by a BSD-style
/ license that can be found in the LICENSE file.
package textproto
/ A MIMEHeader represents a MIME-style header mapping
/ keys to sets of values.
type MIMEHeader map[string][]string
/ Add adds the key, value pair to the header.
/ It appends to any existing values associated with key.
func (h MIMEHeader) Add(key, value string) {
key = CanonicalMIMEHeaderKey(key)
h[key] = append(h[key], value)
}
/ Set sets the header entries associated with key to
/ the single element value. It replaces any existing
/ values associated with key.
func (h MIMEHeader) Set(key, value string) {
h[CanonicalMIMEHeaderKey(key)] = []string{value}
}
/ Get gets the first value associated with the given key.
/ It is case insensitive; CanonicalMIMEHeaderKey is used
/ to canonicalize the provided key.
/ If there are no values associated with the key, Get returns "".
/ To use non-canonical keys, access the map directly.
func (h MIMEHeader) Get(key string) string {
if h == nil {
return ""
}
v := h[CanonicalMIMEHeaderKey(key)]
if len(v) == 0 {
return ""
}
return v[0]
}
/ Values returns all values associated with the given key.
/ It is case insensitive; CanonicalMIMEHeaderKey is
/ used to canonicalize the provided key. To use non-canonical
/ keys, access the map directly.
/ The returned slice is not a copy.
func (h MIMEHeader) Values(key string) []string {
if h == nil {
return nil
}
return h[CanonicalMIMEHeaderKey(key)]
}
/ Del deletes the values associated with key.
func (h MIMEHeader) Del(key string) {
delete(h, CanonicalMIMEHeaderKey(key))
}