[fix]http头部可以重复key

pkg/nazahttp/header.go

@@ -12,14 +12,29 @@ import (
 	"strings"
 )
 
+type HttpHeaders  map[string][]string
+
 type LineReader interface {
 	ReadLine() (line []byte, isPrefix bool, err error)
 }
 
+func (h HttpHeaders) Value(key string)string  {
+	values,ok:=h[key]
+	if !ok{
+		return ""
+	}
+	return values[0]
+}
+func (h HttpHeaders) Values(key string)[]string  {
+   return h[key]
+}
+func (h HttpHeaders) SetValue(key,value string)  {
+	h[key] = append(h[key],value)
+}
 // @return firstLine: request的request line或response的status line
 // @return headers: request header fileds的键值对
-func ReadHttpHeader(r LineReader) (firstLine string, headers map[string][]string, err error) {
-	headers = make(map[string][]string)
+func ReadHttpHeader(r LineReader) (firstLine string, headers HttpHeaders, err error) {
+	headers = make(HttpHeaders)
 
 	var line []byte
 	var isPrefix bool
@@ -51,7 +66,7 @@ func ReadHttpHeader(r LineReader) (firstLine string, headers map[string][]string
 			err = ErrHttpHeader
 			return
 		}
-		headers[strings.Trim(l[0:pos], " ")] = append(headers[strings.Trim(l[0:pos], " ")],strings.Trim(l[pos+1:], " "))
+		headers.SetValue(strings.Trim(l[0:pos], " "),strings.Trim(l[pos+1:], " "))
 	}
 	return
 }

pkg/nazahttp/read_message.go

@@ -23,7 +23,7 @@ type HttpMsgCtx struct {
 	ReqMethodOrRespVersion string
 	ReqUriOrRespStatusCode string
 	ReqVersionOrRespReason string
-	Headers                map[string][]string
+	Headers                HttpHeaders
 	Body                   []byte
 }
 
@@ -31,7 +31,7 @@ type HttpReqMsgCtx struct {
 	Method  string
 	Uri     string
 	Version string
-	Headers map[string][]string
+	Headers HttpHeaders
 	Body    []byte
 }
 
@@ -39,7 +39,7 @@ type HttpRespMsgCtx struct {
 	Version    string
 	StatusCode string
 	Reason     string
-	Headers    map[string][]string
+	Headers    HttpHeaders
 	Body       []byte
 }