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COSXML/Model/Object/OptionObjectRequest.cs

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+using System;
+using System.Collections.Generic;
+
+using System.Text;
+using COSXML.Common;
+using COSXML.CosException;
+
+namespace COSXML.Model.Object
+{
+    /// <summary>
+    /// 实现 Object 跨域访问配置的预请求
+    /// <see cref="https://cloud.tencent.com/document/product/436/8288"/>
+    /// </summary>
+    public sealed class OptionObjectRequest : ObjectRequest
+    {
+        /// <summary>
+        /// 模拟跨域访问的请求来源域名
+        /// </summary>
+        private string origin;
+        /// <summary>
+        /// 模拟跨域访问的请求 HTTP 方法
+        /// </summary>
+        private string accessControlMethod;
+
+        public OptionObjectRequest(string bucket, string key, string origin, string accessControlMethod)
+            : base(bucket, key)
+        {
+            this.method = CosRequestMethod.OPTIONS;
+            this.origin = origin;
+            if (accessControlMethod != null)
+            {
+                this.accessControlMethod = accessControlMethod.ToUpper();
+            }
+        }
+        /// <summary>
+        /// 模拟跨域访问的请求来源域名
+        /// </summary>
+        /// <param name="origin"></param>
+        public void SetOrigin(string origin)
+        {
+            this.origin = origin;
+        }
+        /// <summary>
+        /// 模拟跨域访问的请求 HTTP 方法
+        /// </summary>
+        /// <param name="accessControlMethod"></param>
+        public void SetAccessControlMethod(string accessControlMethod)
+        {
+            if (accessControlMethod != null)
+            {
+                this.accessControlMethod = accessControlMethod.ToUpper();
+            }
+        }
+        /// <summary>
+        /// 模拟跨域访问的请求头部
+        /// </summary>
+        /// <param name="accessControlHeaders"></param>
+        public void SetAccessControlHeaders(List<string> accessControlHeaders)
+        {
+            if (accessControlHeaders != null)
+            {
+                StringBuilder headers = new StringBuilder();
+                foreach (string accessControlHeader in accessControlHeaders)
+                {
+                    if(accessControlHeader != null) headers.Append(accessControlHeader).Append(",");
+                }
+                string result = headers.ToString();
+                if (result.EndsWith(","))
+                {
+                    result = result.Substring(0, result.Length - 1);
+                    SetRequestHeader(CosRequestHeaderKey.ACCESS_CONTROL_REQUEST_HEADERS, result);
+                }
+            }
+        }
+
+        public override void CheckParameters()
+        {
+            if (origin == null)
+            {
+                throw new CosClientException((int)CosClientError.INVALID_ARGUMENT, "origin = null");
+            }
+            if (accessControlMethod == null)
+            {
+                throw new CosClientException((int)CosClientError.INVALID_ARGUMENT, "accessControlMethod = null");
+            }
+            base.CheckParameters();
+        }
+
+        protected override void InteranlUpdateHeaders()
+        {
+            try
+            {
+                this.headers.Add(CosRequestHeaderKey.ORIGIN, origin);
+            }
+            catch (ArgumentException)
+            {
+                this.headers[CosRequestHeaderKey.ORIGIN] = origin;
+            }
+            try
+            {
+                this.headers.Add(CosRequestHeaderKey.ACCESS_CONTROL_REQUEST_METHOD, accessControlMethod);
+            }
+            catch (ArgumentException)
+            {
+                this.headers[CosRequestHeaderKey.ACCESS_CONTROL_REQUEST_METHOD] = accessControlMethod;
+            }
+        }
+    }
+}