更新header key 定义

header.go

@@ -24,3 +24,16 @@ var (
 	HeaderKeyAccessControlExposeHeaders HttpHeader = "Access-Control-Expose-Headers" // 允许浏览器端能够获取相应的header值
 	HeaderKeyAccessControlMaxAge        HttpHeader = "Access-Control-Max-Age"        // 控制发送预检请求options的频率，单位 : 秒
 )
+
+var (
+	HeaderKeyContentType    HttpHeader = "Content-Type"    // 请求头中Content-Type的key
+	HeaderKeyReferer        HttpHeader = "Referer"         // 请求头中Referer的key
+	HeaderKeyUserAgent      HttpHeader = "User-Agent"      // 请求头中User-Agent的key
+	HeaderKeyAccept         HttpHeader = "Accept"          // accept
+	HeaderKeyAcceptEncoding HttpHeader = "Accept-Encoding" // accept-encoding
+	HeaderKeyAcceptLanguage HttpHeader = "Accept-Language" // accept-language
+	HeaderKeyAuthorization  HttpHeader = "Authorization"   // authorization
+	HeaderKeyCookie         HttpHeader = "Cookie"          // cookie
+	HeaderKeyOrigin         HttpHeader = "Origin"          // origin
+	HeaderKeyHost           HttpHeader = "Host"            // host
+)