From e87f0312937e52b6d21b2fedc9c2c8fb23bde483 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=88=98=E7=A5=A5=E8=B6=85?= <iwind.liu@gmail.com>
Date: Thu, 29 Dec 2022 17:16:42 +0800
Subject: [PATCH] =?UTF-8?q?=E5=A2=9E=E5=8A=A0CORS=E8=87=AA=E9=80=82?=
 =?UTF-8?q?=E5=BA=94=E8=B7=A8=E5=9F=9F?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 internal/nodes/http_request.go | 32 +++++++++++++++++++++++++++++++-
 1 file changed, 31 insertions(+), 1 deletion(-)

diff --git a/internal/nodes/http_request.go b/internal/nodes/http_request.go
index 35049b8..e8f744e 100644
--- a/internal/nodes/http_request.go
+++ b/internal/nodes/http_request.go
@@ -1556,7 +1556,7 @@ func (this *HTTPRequest) processRequestHeaders(reqHeader http.Header) {
 			}
 
 			// 是否已删除
-			if this.web.ResponseHeaderPolicy.ContainsDeletedHeader(header.Name) {
+			if this.web.RequestHeaderPolicy.ContainsDeletedHeader(header.Name) {
 				continue
 			}
 
@@ -1694,6 +1694,36 @@ func (this *HTTPRequest) processResponseHeaders(responseHeader http.Header, stat
 				responseHeader[header.Name] = []string{headerValue}
 			}
 		}
+
+		// CORS
+		if this.web.ResponseHeaderPolicy.CORS != nil && this.web.ResponseHeaderPolicy.CORS.IsOn {
+			var corsConfig = this.web.ResponseHeaderPolicy.CORS
+
+			// Allow-Origin
+			if len(corsConfig.AllowOrigin) == 0 {
+				var origin = this.RawReq.Header.Get("Origin")
+				if len(origin) > 0 {
+					responseHeader.Set("Access-Control-Allow-Origin", origin)
+				}
+			} else {
+				responseHeader.Set("Access-Control-Allow-Origin", corsConfig.AllowOrigin)
+			}
+
+			// Allow-Methods
+			if len(corsConfig.AllowMethods) == 0 {
+				responseHeader.Set("Access-Control-Allow-Methods", "PUT, GET, POST, DELETE, HEAD, OPTIONS")
+			} else {
+				responseHeader.Set("Access-Control-Allow-Methods", strings.Join(corsConfig.AllowMethods, ", "))
+			}
+
+			// Max-Age
+			if corsConfig.MaxAge > 0 {
+				responseHeader.Set("Access-Control-Max-Age", types.String(corsConfig.MaxAge))
+			}
+
+			// Allow-Credentials
+			responseHeader.Set("Access-Control-Allow-Credentials", "true")
+		}
 	}
 
 	// HSTS