发布：2022/12/5 16:36:33作者：管理员 来源：本站 浏览次数：622
代码下载地址 https://github.com/whuanle/txypx20190809
前提
创建子账号
打开 https://console.cloud.tencent.com/cam
创建子用户，设置子账号策略为 AdministratorAccess ，或者参考https://cloud.tencent.com/document/product/436/11714 ，添加访问 COS 的权限 记录子用户的 账号ID。
切换子用户登录。
添加 appid 密钥
打开 https://console.cloud.tencent.com/cam/capi
新建 API 密钥，记录下 appid，记录 SecretId 和 SecretKey。
记录 Region
打开 https://cloud.tencent.com/document/product/436/6224
可以查询可用区/地域的 region。
本教程使用 C# 开发。
一，SDK 和使用
腾讯云官网提供了 .NET 版本的 对象存储(COS) SDK，并提供使用教程，教程链接：
https://cloud.tencent.com/document/product/436/32819
Nuget 搜索 Tencent.QCloud.Cos.Sdk 安装即可。
using 需引入
using COSXML;
using COSXML.Auth;
using COSXML.Model.Object;
using COSXML.Model.Bucket;
using COSXML.CosException;
using COSXML.Utils;
using COSXML.Model.Service;
using COSXML.Transfer;
using COSXML.Model;
根据官方的教程，很容易编写自己的软件：
Ctrl + C ，然后 Ctrl + V
拷贝完毕，大概是这样的
using System;
using System.Collections.Generic;
using System.Text;
using COSXML;
using COSXML.Auth;
using COSXML.Model.Object;
using COSXML.Model.Bucket;
using COSXML.CosException;
using COSXML.Utils;
using COSXML.Model.Service;
using COSXML.Transfer;
using COSXML.Model;
namespace CosTest
{
public class CosClient
{
CosXmlServer cosXml;
private readonly string _appid;
private readonly string _region;
public CosClient(string appid, string region)
{
_appid = appid;
_region = region;
//初始化 CosXmlConfig
//string appid = "100011070645";
//string region = "ap-guangzhou";
CosXmlConfig config = new CosXmlConfig.Builder()
.SetConnectionTimeoutMs(60000)
.SetReadWriteTimeoutMs(40000)
.IsHttps(true)
.SetAppid(appid)
.SetRegion(region)
.SetDebugLog(true)
.Build();
QCloudCredentialProvider cosCredentialProvider = null;
string secretId = "AKID62jALHsVmpfHentPs9E6lBMJ2XnnsTzH"; //"云 API 密钥 SecretId";
string secretKey = "CC0c1DAtNdfS0IPIvISRFtIUSCUYTAgy"; //"云 API 密钥 SecretKey";
long durationSecond = 600; //secretKey 有效时长,单位为 秒
cosCredentialProvider = new DefaultQCloudCredentialProvider(secretId, secretKey, durationSecond);
//初始化 CosXmlServer
cosXml = new CosXmlServer(config, cosCredentialProvider);
}
public bool CreateBucket(string buketName)
{
try
{
string bucket = buketName + "-" + _appid; //存储桶名称 格式：BucketName-APPID
PutBucketRequest request = new PutBucketRequest(buketName);
//设置签名有效时长
request.SetSign(TimeUtils.GetCurrentTime(TimeUnit.SECONDS), 600);
//执行请求
PutBucketResult result = cosXml.PutBucket(request);
//请求成功
Console.WriteLine(result.GetResultInfo());
return true;
}
catch (COSXML.CosException.CosClientException clientEx)
{
//请求失败
Console.WriteLine("CosClientException: " + clientEx.Message);
return false;
}
catch (COSXML.CosException.CosServerException serverEx)
{
//请求失败
Console.WriteLine("CosServerException: " + serverEx.GetInfo());
return false;
}
}
public bool SelectBucket()
{
try
{
GetServiceRequest request = new GetServiceRequest();
//设置签名有效时长
request.SetSign(TimeUtils.GetCurrentTime(TimeUnit.SECONDS), 600);
//执行请求
GetServiceResult result = cosXml.GetService(request);
//请求成功
Console.WriteLine(result.GetResultInfo());
return true;
}
catch (COSXML.CosException.CosClientException clientEx)
{
//请求失败
Console.WriteLine("CosClientException: " + clientEx.Message);
return false;
}
catch (COSXML.CosException.CosServerException serverEx)
{
//请求失败
Console.WriteLine("CosServerException: " + serverEx.GetInfo());
return false;
}
}
public bool Upfile(string buketName, string key, string srcPath)
{
try
{
string bucket = buketName + "-" + _appid; //存储桶名称 格式：BucketName-APPID
PutObjectRequest request = new PutObjectRequest(bucket, key, srcPath);
//设置签名有效时长
request.SetSign(TimeUtils.GetCurrentTime(TimeUnit.SECONDS), 600);
//设置进度回调
request.SetCosProgressCallback(delegate (long completed, long total)
{
Console.WriteLine(String.Format("progress = {0:##.##}%", completed * 100.0 / total));
});
//执行请求
PutObjectResult result = cosXml.PutObject(request);
//请求成功
Console.WriteLine(result.GetResultInfo());
return true;
}
catch (COSXML.CosException.CosClientException clientEx)
{
//请求失败
Console.WriteLine("CosClientException: " + clientEx.Message);
return false;
}
catch (COSXML.CosException.CosServerException serverEx)
{
//请求失败
Console.WriteLine("CosServerException: " + serverEx.GetInfo());
return false;
}
}
public void UpBigFile(string buketName, string key, string srcPath)
{
string bucket = buketName + "-" + _appid; //存储桶名称 格式：BucketName-APPID
TransferManager transferManager = new TransferManager(cosXml, new TransferConfig());
COSXMLUploadTask uploadTask = new COSXMLUploadTask(bucket, null, key);
uploadTask.SetSrcPath(srcPath);
uploadTask.progressCallback = delegate (long completed, long total)
{
Console.WriteLine(String.Format("progress = {0:##.##}%", completed * 100.0 / total));
};
uploadTask.successCallback = delegate (CosResult cosResult)
{
COSXML.Transfer.COSXMLUploadTask.UploadTaskResult result = cosResult as COSXML.Transfer.COSXMLUploadTask.UploadTaskResult;
Console.WriteLine(result.GetResultInfo());
};
uploadTask.failCallback = delegate (CosClientException clientEx, CosServerException serverEx)
{
if (clientEx != null)
{
Console.WriteLine("CosClientException: " + clientEx.Message);
}
if (serverEx != null)
{
Console.WriteLine("CosServerException: " + serverEx.GetInfo());
}
};
transferManager.Upload(uploadTask);
}
public class ResponseModel
{
public int Code { get; set; }
public string Message { get; set; }
public dynamic Data { get; set; }
}
public ResponseModel SelectObjectList(string buketName)
{
try
{
string bucket = buketName + "-" + _appid; //存储桶名称 格式：BucketName-APPID
GetBucketRequest request = new GetBucketRequest(bucket);
//设置签名有效时长
request.SetSign(TimeUtils.GetCurrentTime(TimeUnit.SECONDS), 600);
//执行请求
GetBucketResult result = cosXml.GetBucket(request);
//请求成功
Console.WriteLine(result.GetResultInfo());
return new ResponseModel { Code = 200, Data = result.GetResultInfo() };
}
catch (COSXML.CosException.CosClientException clientEx)
{
//请求失败
Console.WriteLine("CosClientException: " + clientEx.Message);
return new ResponseModel { Code = 200, Data = clientEx.Message };
}
catch (COSXML.CosException.CosServerException serverEx)
{
//请求失败
Console.WriteLine("CosServerException: " + serverEx.GetInfo());
return new ResponseModel { Code = 200, Data = serverEx.Message };
}
}
public bool DownObject(string buketName, string key, string localDir, string localFileName)
{
try
{
string bucket = buketName + "-" + _appid; //存储桶名称 格式：BucketName-APPID
GetObjectRequest request = new GetObjectRequest(bucket, key, localDir, localFileName);
//设置签名有效时长
request.SetSign(TimeUtils.GetCurrentTime(TimeUnit.SECONDS), 600);
//设置进度回调
request.SetCosProgressCallback(delegate (long completed, long total)
{
Console.WriteLine(String.Format("progress = {0:##.##}%", completed * 100.0 / total));
});
//执行请求
GetObjectResult result = cosXml.GetObject(request);
//请求成功
Console.WriteLine(result.GetResultInfo());
return true;
}
catch (COSXML.CosException.CosClientException clientEx)
{
//请求失败
Console.WriteLine("CosClientException: " + clientEx.Message);
return false;
}
catch (COSXML.CosException.CosServerException serverEx)
{
//请求失败
Console.WriteLine("CosServerException: " + serverEx.GetInfo());
return false;
}
}
public bool DeleteObject(string buketName)
{
try
{
string bucket = buketName + "-" + _appid; //存储桶名称 格式：BucketName-APPID
string key = "exampleobject"; //对象在存储桶中的位置，即称对象键.
DeleteObjectRequest request = new DeleteObjectRequest(bucket, key);
//设置签名有效时长
request.SetSign(TimeUtils.GetCurrentTime(TimeUnit.SECONDS), 600);
//执行请求
DeleteObjectResult result = cosXml.DeleteObject(request);
//请求成功
Console.WriteLine(result.GetResultInfo());
return true;
}
catch (COSXML.CosException.CosClientException clientEx)
{
//请求失败
Console.WriteLine("CosClientException: " + clientEx.Message);
return false;
}
catch (COSXML.CosException.CosServerException serverEx)
{
//请求失败
Console.WriteLine("CosServerException: " + serverEx.GetInfo());
return false;
}
}
}
}
概览：
但是大神说，这样不好，程序要高内聚、低耦合，依赖与抽象而不依赖于具体实现。
那怎么办？只能修改一下。
二，优化
1，对象构建器
对象存储的 SDK 中，有三个重要的对象：
CosXmlConfig 提供配置 SDK 接口。
QCloudCredentialProvider 提供设置密钥信息接口。
CosXmlServer 提供各种 COS API 服务接口。
但是，初始化和配置对象，过于麻烦，那么我们做一个对象构建器，实现函数式编程和链式语法。
/// <summary>
/// 生成Cos客户端工具类
/// </summary>
public class CosBuilder
{
private CosXmlServer cosXml;
private string _appid;
private string _region;
private CosXmlConfig cosXmlConfig;
private QCloudCredentialProvider cosCredentialProvider;
public CosBuilder()
{
}
public CosBuilder SetAccount(string appid, string region)
{
_appid = appid;
_region = region;
return this;
}
public CosBuilder SetCosXmlServer(int ConnectionTimeoutMs = 60000, int ReadWriteTimeoutMs = 40000, bool IsHttps = true, bool SetDebugLog = true)
{
cosXmlConfig = new CosXmlConfig.Builder()
.SetConnectionTimeoutMs(ConnectionTimeoutMs)
.SetReadWriteTimeoutMs(ReadWriteTimeoutMs)
.IsHttps(true)
.SetAppid(_appid)
.SetRegion(_region)
.SetDebugLog(true)
.Build();
return this;
}
public CosBuilder SetSecret(string secretId, string secretKey, long durationSecond = 600)
{
cosCredentialProvider = new DefaultQCloudCredentialProvider(secretId, secretKey, durationSecond);
return this;
}
public CosXmlServer Builder()
{
//初始化 CosXmlServer
cosXml = new CosXmlServer(cosXmlConfig, cosCredentialProvider);
return cosXml;
}
}
2，消息响应对象
为了统一返回消息，创建一个 Response Model 的类。
/// <summary>
/// 消息响应
/// </summary>
public class ResponseModel
{
public int Code { get; set; }
public string Message { get; set; }
public dynamic Data { get; set; }
}
3，接口
实际上，访问 COS和控制，和存储桶内的操作，是可以分开的。
访问 COS 可以控制对象存储内的所有东西，但是每个存储桶又是一个独立的对象。
为了松耦合，我们拆分两个客户端，一个用来管理连接、存储桶等，一个用来管理存储桶内的操作。
接口如下：
public interface ICosClient
{
// 创建存储桶
Task<ResponseModel> CreateBucket(string buketName);
// 获取存储桶列表
Task<ResponseModel> SelectBucket(int tokenTome = 600);
}
public interface IBucketClient
{
// 上传文件
Task<ResponseModel> UpFile(string key, string srcPath);
// 分块上传大文件
Task<ResponseModel> UpBigFile(string key, string srcPath, Action<long, long> progressCallback, Action<CosResult> successCallback);
// 查询存储桶的文件列表
Task<ResponseModel> SelectObjectList();
// 下载文件
Task<ResponseModel> DownObject(string key, string localDir, string localFileName);
// 删除文件
Task<ResponseModel> DeleteObject(string buketName);
}
所有接口功能都使用异步实现。
4，COS 客户端
基架代码：
public class CosClient : ICosClient
{
CosXmlServer _cosXml;
private readonly string _appid;
private readonly string _region;
public CosClient(CosXmlServer cosXml)
{
_cosXml = cosXml;
}
}
创建存储桶：
public async Task<ResponseModel> CreateBucket(string buketName)
{
try
{
string bucket = buketName + "-" + _appid;
PutBucketRequest request = new PutBucketRequest(bucket);
//设置签名有效时长
request.SetSign(TimeUtils.GetCurrentTime(TimeUnit.SECONDS), 600);
//执行请求
PutBucketResult result = await Task.FromResult(_cosXml.PutBucket(request));
return new ResponseModel { Code = 200, Message = result.GetResultInfo() };
}
catch (COSXML.CosException.CosClientException clientEx)
{
//请求失败
Console.WriteLine();
return new ResponseModel { Code = 0, Message = "CosClientException: " + clientEx.Message };
}
catch (COSXML.CosException.CosServerException serverEx)
{
return new ResponseModel { Code = 200, Message = "CosServerException: " + serverEx.GetInfo() };
}
}
查询存储桶列表
public async Task<ResponseModel> SelectBucket(int tokenTome = 600)
{
try
{
GetServiceRequest request = new GetServiceRequest();
//设置签名有效时长
request.SetSign(TimeUtils.GetCurrentTime(TimeUnit.SECONDS), tokenTome);
//执行请求
GetServiceResult result = await Task.FromResult(_cosXml.GetService(request));
return new ResponseModel { Code = 200, Message = "Success", Data = result.GetResultInfo() };
}
catch (COSXML.CosException.CosClientException clientEx)
{
return new ResponseModel { Code = 0, Message = "CosClientException: " + clientEx.Message };
}
catch (CosServerException serverEx)
{
return new ResponseModel { Code = 0, Message = "CosServerException: " + serverEx.GetInfo() };
}
}
5，存储桶操作客户端
基架代码如下：
/// <summary>
/// 存储桶客户端
/// </summary>
public class BucketClient : IBucketClient
{
private readonly CosXmlServer _cosXml;
private readonly string _buketName;
private readonly string _appid;
public BucketClient(CosXmlServer cosXml, string buketName, string appid)
{
_cosXml = cosXml;
_buketName = buketName;
_appid = appid;
}
}
上传对象
public async Task<ResponseModel> UpFile(string key, string srcPath)
{
try
{
string bucket = _buketName + "-" + _appid; //存储桶名称 格式：BucketName-APPID
PutObjectRequest request = new PutObjectRequest(bucket, key, srcPath);
//设置签名有效时长
request.SetSign(TimeUtils.GetCurrentTime(TimeUnit.SECONDS), 600);
//设置进度回调
request.SetCosProgressCallback(delegate (long completed, long total)
{
Console.WriteLine(String.Format("progress = {0:##.##}%", completed * 100.0 / total));
});
//执行请求
PutObjectResult result = await Task.FromResult(_cosXml.PutObject(request));
return new ResponseModel { Code = 200, Message = result.GetResultInfo() };
}
catch (CosClientException clientEx)
{
return new ResponseModel { Code = 0, Message = "CosClientException: " + clientEx.Message };
}
catch (CosServerException serverEx)
{
return new ResponseModel { Code = 0, Message = "CosServerException: " + serverEx.GetInfo() };
}
}
大文件分块上传
/// <summary>
/// 上传大文件、分块上传
/// </summary>
/// <param name="key"></param>
/// <param name="srcPath"></param>
/// <param name="progressCallback">委托，可用于显示分块信息</param>
/// <param name="successCallback">委托，当任务成功时回调</param>
/// <returns></returns>
public async Task<ResponseModel> UpBigFile(string key, string srcPath, Action<long, long> progressCallback, Action<CosResult> successCallback)
{
ResponseModel responseModel = new ResponseModel();
string bucket = _buketName + "-" + _appid; //存储桶名称 格式：BucketName-APPID
TransferManager transferManager = new TransferManager(_cosXml, new TransferConfig());
COSXMLUploadTask uploadTask = new COSXMLUploadTask(bucket, null, key);
uploadTask.SetSrcPath(srcPath);
uploadTask.progressCallback = delegate (long completed, long total)
{
progressCallback(completed, total);
//Console.WriteLine(String.Format("progress = {0:##.##}%", completed * 100.0 / total));
};
uploadTask.successCallback = delegate (CosResult cosResult)
{
COSXMLUploadTask.UploadTaskResult result = cosResult as COSXMLUploadTask.UploadTaskResult;
successCallback(cosResult);
responseModel.Code = 200;
responseModel.Message = result.GetResultInfo();
};
uploadTask.failCallback = delegate (CosClientException clientEx, CosServerException serverEx)
{
if (clientEx != null)
{
responseModel.Code = 0;
responseModel.Message = clientEx.Message;
}
if (serverEx != null)
{
responseModel.Code = 0;
responseModel.Message = "CosServerException: " + serverEx.GetInfo();
}
};
await Task.Run(() =>
{
transferManager.Upload(uploadTask);
});
return responseModel;
}
查询对象列表
public async Task<ResponseModel> SelectObjectList()
{
try
{
string bucket = _buketName + "-" + _appid; //存储桶名称 格式：BucketName-APPID
GetBucketRequest request = new GetBucketRequest(bucket);
//设置签名有效时长
request.SetSign(TimeUtils.GetCurrentTime(TimeUnit.SECONDS), 600);
//执行请求
GetBucketResult result = await Task.FromResult(_cosXml.GetBucket(request));
return new ResponseModel { Code = 200, Data = result.GetResultInfo() };
}
catch (CosClientException clientEx)
{
return new ResponseModel { Code = 0, Data = "CosClientException: " + clientEx.Message };
}
catch (CosServerException serverEx)
{
return new ResponseModel { Code = 0, Data = "CosServerException: " + serverEx.GetInfo() };
}
}
下载对象 、删除对象
public async Task<ResponseModel> DownObject(string key, string localDir, string localFileName)
{
try
{
string bucket = _buketName + "-" + _appid; //存储桶名称 格式：BucketName-APPID
GetObjectRequest request = new GetObjectRequest(bucket, key, localDir, localFileName);
//设置签名有效时长
request.SetSign(TimeUtils.GetCurrentTime(TimeUnit.SECONDS), 600);
//设置进度回调
request.SetCosProgressCallback(delegate (long completed, long total)
{
Console.WriteLine(String.Format("progress = {0:##.##}%", completed * 100.0 / total));
});
//执行请求
GetObjectResult result = await Task.FromResult(_cosXml.GetObject(request));
return new ResponseModel { Code = 200, Message = result.GetResultInfo() };
}
catch (CosClientException clientEx)
{
return new ResponseModel { Code = 0, Message = "CosClientException: " + clientEx.Message };
}
catch (CosServerException serverEx)
{
return new ResponseModel { Code = 0, Message = serverEx.GetInfo() };
}
}
public async Task<ResponseModel> DeleteObject(string buketName)
{
try
{
string bucket = _buketName + "-" + _appid; //存储桶名称 格式：BucketName-APPID
string key = "exampleobject"; //对象在存储桶中的位置，即称对象键.
DeleteObjectRequest request = new DeleteObjectRequest(bucket, key);
//设置签名有效时长
request.SetSign(TimeUtils.GetCurrentTime(TimeUnit.SECONDS), 600);
//执行请求
DeleteObjectResult result = await Task.FromResult(_cosXml.DeleteObject(request));
return new ResponseModel { Code = 200, Message = result.GetResultInfo() };
}
catch (CosClientException clientEx)
{
return new ResponseModel { Code = 0, Message = "CosClientException: " + clientEx.Message };
}
catch (CosServerException serverEx)
{
return new ResponseModel { Code = 0, Message = "CosServerException: " + serverEx.GetInfo() };
}
}
以上代码将官方示例作了优化。
依赖于抽象、实现接口；
松耦合；
异步网络流、异步文件流；
统一返回信息；
增加匿名委托作方法参数；
增加灵活性。
三，使用封装好的代码
1，初始化
官网示例文档：
使用修改后的代码，你可以这样初始化：
var cosClient = new CosBuilder()
.SetAccount("1252707544", " ap-guangzhou")
.SetCosXmlServer()
.SetSecret("AKIDEZohU6AmkeNTVPmedw65Ws462rVxLIpG", "Sn1iFi182jMARcheQ1gYIsGSROE5rSwG")
.Builder();
简单测试代码
static async Task Main(string[] args)
{
// 构建一个 CoxXmlServer 对象
var cosClient = new CosBuilder()
.SetAccount("125x707xx4", "ap-guangzhou")
.SetCosXmlServer()
.SetSecret("AKIxxxxxxedw65Ws462rVxLIpG", "Sn1iFi1xxxxxwG")
.Builder();
// 创建Cos连接客户端
ICosClient client = new CosClient(cosClient, "125xx0xx44");
// 创建一个存储桶
var result = await client.CreateBucket("fsdgerer");
Console.WriteLine("处理结果：" + result.Message);
// 查询存储桶列表
var c = await client.SelectBucket();
Console.WriteLine(c.Message + c.Data);
Console.ReadKey();
}
运行结果(部分重要信息使用xx屏蔽)：
处理结果：200 OK
Connection: keep-alive
Date: Fri, 09 Aug 2019 14:15:00 GMT
Server: tencent-cos
x-cos-request-id: xxxxxxxx=
Content-Length: 0
Success200 OK
Connection: keep-alive
Date: Fri, 09 Aug 2019 14:15:01 GMT
Server: tencent-cos
x-cos-request-id: xxxxxxx=
Content-Type: application/xml
Content-Length: 479
{ListAllMyBuckets:
{Owner:
ID:qcs::cam::uin/1586xx146:uin/158xxx2146
DisPlayName:158x2146
}
Buckets:
{Bucket:
Name:fsdgerer-125xxx7544
Location:ap-guangzhou
CreateDate:
}
{Bucket:
Name:work-1252xxx7544
Location:ap-guangzhou
CreateDate:
}
}
}
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