OSS签名Header实现Demo（C#）

概述
OSS的集成上传和下载提供了SDK可以直接使用，但实际使用中一些用户受限环境或者设备限制需要使用api方式来实现上传和下载，本文以PutObject接口为例，提供了C#实现的demo。
注：建议优先使用OSS提供SDK，本文提供的只是签名实现上传demo，实际使用中需要结合业务来进行改动代码
详细信息
PutObject实现demo（visual studio 2017，NET Framework4.0）

using System; using System.Security.Cryptography; using System.Text; using System.Net; using System.IO; using System.Reflection; namespace Aliyun.OSS.Samples { class Program { //您的AccessKey public static string AccessKey = "xx"; //您的 AccessKeySecret public static string AccessKeySecret = "xx"; //bucket所在的endpoint public static string Endpoint = "oss-cn-hangzhou.aliyuncs.com"; public static string BucketName = "xx"; public static string objectName = "mytest/1.txt"; public static string HmacSha1Sign(string secret, string strOrgData) { var hmacsha1 = new HMACSHA1(Encoding.UTF8.GetBytes(secret)); var dataBuffer = Encoding.UTF8.GetBytes(strOrgData); var hashBytes = hmacsha1.ComputeHash(dataBuffer); return Convert.ToBase64String(hashBytes); } public static string HttpRequest(string url, string data, string sign, string contentType, string time1) { byte[] datas = System.Text.Encoding.GetEncoding("UTF-8").GetBytes(data); HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url); request.Method = "PUT"; request.Timeout = 150000; request.Headers.Add("Authorization", "OSS " + AccessKey + ":" + sign); CallPrivateMethod(request, "SetSpecialHeaders", "Date", time1); request.ContentType = contentType; Stream requestStream = null; string responseStr = null; try { if (datas != null) { request.ContentLength = datas.Length; requestStream = request.GetRequestStream(); requestStream.Write(datas, 0, datas.Length); requestStream.Close(); } else { request.ContentLength = 0; } HttpWebResponse response = request.GetResponse() as HttpWebResponse; responseStr = response.Headers.GetValues("x-oss-request-id")[0]; //responseStr = sr.ReadToEnd(); } catch (Exception) { Console.WriteLine("error"); } finally { request = null; requestStream = null; } return responseStr; } public static string ToGMTString() { return DateTime.Now.ToUniversalTime().ToString("r"); } public static void CallPrivateMethod(object instance, string name, params object[] param) { BindingFlags flag = BindingFlags.Instance | BindingFlags.NonPublic; Type type = instance.GetType(); MethodInfo method = type.GetMethod(name, flag); method.Invoke(instance, param); } static void Main(string[] args) { string varb = "PUT"; string content_type = "application/json"; string timeGmt = ToGMTString(); string str = varb + "\n\n" + content_type + "\n" + timeGmt + "\n/" + BucketName + "/" + objectName; string signature = HmacSha1Sign(AccessKeySecret, str); string url = "http://" + BucketName + "." + Endpoint + "/" + objectName; string data = "{ \"key\":\"this is a oss's test\"}"; string result = HttpRequest(url, data, signature, content_type, timeGmt); Console.WriteLine("requestId: " + result); } } }