C# 使用阿里OSS处理图片

/*
OSS
帮助类
*/

using Aliyun.OSS;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace OSSDemo
{

    public class OSSClientHelper
    {
        const string accessKeyId = "";
        const string accessKeySecret = "";
        const string endpoint = "http://oss-cn-beijing.aliyuncs.com";
        const string bucketName = "";//

        public static OssClient GetClient()
        {
            return new OssClient(endpoint, accessKeyId, accessKeySecret);
        }

        /// <summary>
        /// 上传一个图片
        /// </summary>
        /// <param name="base64Code">图片经过base64加密后的结果</param>
        /// <param name="fileName">文件名,例如:Emplyoee/dzzBack.jpg</param>
        public static bool PushImg(string base64Code, string fileName)
        {
            try
            {
                var client = GetClient();
                MemoryStream stream = new MemoryStream(Convert.FromBase64String(base64Code));
                return client.PutObject(bucketName, fileName, stream).HttpStatusCode== System.Net.HttpStatusCode.OK;
            }
            catch (Exception)
            { }
            return false;
        }
        /// <summary>
        /// 上传一个图片
        /// </summary>
        /// <param name="filebyte">图片字节 </param>
        /// <param name="fileName">文件名,例如:Emplyoee/dzzBack.jpg</param>
        public static bool PushImg(byte[] filebyte, string fileName)
        {
            try
            {
                var client = GetClient();
                MemoryStream stream = new MemoryStream(filebyte,0,filebyte.Length);
                return client.PutObject(bucketName, fileName, stream).HttpStatusCode == System.Net.HttpStatusCode.OK;
            }
            catch (Exception)
            { }
            return false;
        }
        /// <summary>
        /// 获取鉴权后的URL,URL有效日期默认一小时
        /// </summary>
        /// <param name="fileName">文件名,例如:Emplyoee/dzzBack.jpg</param>
        /// <returns></returns>
        public static string GetImg(string fileName)
        {
            var client = GetClient();
            var key = fileName;
            var req = new GeneratePresignedUriRequest(bucketName, key, SignHttpMethod.Get)
            {
                Expiration = DateTime.Now.AddHours(1)
            };
            return client.GeneratePresignedUri(req).ToString();
        }
        /// <summary>
        /// 获取鉴权后的URL
        /// </summary>
        /// <param name="fileName">文件名,例如:Emplyoee/dzzBack.jpg</param>
        /// <param name="expiration">URL有效日期,例如:DateTime.Now.AddHours(1) </param>
        /// <returns></returns>
        public static string GetImg(string fileName, DateTime expiration)
        {
            var client = GetClient();
            var key = fileName;
            var req = new GeneratePresignedUriRequest(bucketName, key, SignHttpMethod.Get)
            {
                Expiration = expiration
            };
            return client.GeneratePresignedUri(req).ToString();
        }
    }
}

　　

/*调用*/

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Aliyun.OSS;
using System.IO;
using System.Diagnostics;

namespace OSSDemo
{
    class Program
    {


        static void Main(string[] args)
        {
            string fileName = "IMEI/111.jpg";
            //上传一张图片
            var pushRes = OSSClientHelper.PushImg(File.ReadAllBytes(@"D:1.jpg"), fileName);
            //获取临时URL 超时时间30秒
            var url = OSSClientHelper.GetImg(fileName, DateTime.Now.AddSeconds(30));
            Console.ReadKey();
        }
    }
}

　　

// 2018-11-20 更新帮助类。

using Aliyun.OSS;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace zz.Oss
{
    /// <summary>
    /// 阿里OSS帮助类
    /// </summary>
    public class OssALiHelper
    {
        private string _accessKeyId = string.Empty;
        private string _accessKeySecret = string.Empty;
        private string _endpoint = string.Empty;
        private string _bucketName = string.Empty;

        /// <summary>
        /// 实例化构造函数
        /// </summary>
        /// <param name="accessKeyId">accessKeyId,例如:LaTAI9o9qf9iC1Qxfyf4t</param>
        /// <param name="accessKeySecret">Secret，例如:xITragGClDJsfsQfIbHSCfebSJdcjsfBv4jSP</param>
        /// <param name="endpoint">地域节点，例如:http://oss-cn-beijing.aliyuncs.com</param>
        /// <param name="bucketName">bucket名称,该名称在阿里云是唯一的，申请时请注意。例如:drumbeat</param>
        public OssALiHelper(string accessKeyId, string accessKeySecret, string endpoint, string bucketName)
        {
            _accessKeyId = accessKeyId ?? throw new ArgumentNullException(nameof(accessKeyId));
            _accessKeySecret = accessKeySecret ?? throw new ArgumentNullException(nameof(accessKeySecret));
            _endpoint = endpoint ?? throw new ArgumentNullException(nameof(endpoint));
            _bucketName = bucketName ?? throw new ArgumentNullException(nameof(bucketName));
        }
        public OssClient GetClient()
        {
            return new OssClient(_endpoint, _accessKeyId, _accessKeySecret);
        }
        /// <summary>
        /// 上传一个图片
        /// </summary>
        /// <param name="base64Code">图片经过base64加密后的结果</param>
        /// <param name="fileName">文件名,例如:Emplyoee/dzzBack.jpg</param>
        public bool PushImg(string base64Code, string fileName)
        {
            try
            {
                var client = GetClient();
                MemoryStream stream = new MemoryStream(Convert.FromBase64String(base64Code));
                return client.PutObject(_bucketName, fileName, stream).HttpStatusCode == System.Net.HttpStatusCode.OK;
            }
            catch (Exception)
            { }
            return false;
        }
        /// <summary>
        /// 上传一个文件
        /// </summary>
        /// <param name="filebyte">图片字节 </param>
        /// <param name="fileName">文件名,例如:Emplyoee/dzzBack.jpg</param>
        public bool PushFile(byte[] filebyte, string fileName)
        {
            try
            {
                var client = GetClient();
                MemoryStream stream = new MemoryStream(filebyte, 0, filebyte.Length);
                return client.PutObject(_bucketName, fileName, stream).HttpStatusCode == System.Net.HttpStatusCode.OK;
            }
            catch (Exception)
            { }
            return false;
        }
        /// <summary>
        /// 获取鉴权后的URL,文件过期时间默认设置为100年
        /// </summary>
        /// <param name="fileName">文件名,例如:Emplyoee/dzzBack.jpg</param>
        /// <returns></returns>
        public string GetFileUrl(string fileName)
        {
            var client = GetClient();
            var key = fileName;
            var req = new GeneratePresignedUriRequest(_bucketName, key, SignHttpMethod.Get)
            {
                Expiration = DateTime.Now.AddYears(100)
            };
            return client.GeneratePresignedUri(req).ToString();
        }
        /// <summary>
        /// 获取鉴权后的URL
        /// </summary>
        /// <param name="fileName">文件名,例如:Emplyoee/dzzBack.jpg</param>
        /// <param name="expiration">URL有效日期,例如:DateTime.Now.AddHours(1) </param>
        /// <returns></returns>
        public string GetFileUrl(string fileName, DateTime expiration)
        {
            var client = GetClient();
            var key = fileName;
            var req = new GeneratePresignedUriRequest(_bucketName, key, SignHttpMethod.Get)
            {
                Expiration = expiration
            };
            return client.GeneratePresignedUri(req).ToString();
        }
    }
}