今天想弄个服务器监控的API,发现阿里云上面本来就提供api接口。
https://help.aliyun.com/document_detail/27208.html?spm=a2c4g.11186623.6.673.P6XLr2
https://error-center.aliyun.com/status/product/Cdn?spm=a2c69.11428812.0.0.47435e6a25YlIH
但是没有C#版的示例,很蛋疼,那就自己写呗,显示照着Java的示例改成C#的,发现那个签名好像还是计算错误了。
百度也没搜到有用的文章,最后Google.com搜索到了一个例子,完美解决了!
using System; using System.Collections.Generic; using System.Linq; using System.Net.Http; using System.Security.Cryptography; using System.Text; using System.Threading.Tasks; using System.Web; namespace DomainRequest { public class RequestHelper { /// <summary> /// 返回值的类型,支持JSON与XML。默认为XML /// </summary> public string Format { get; set; } = "JSON"; /// <summary> /// API版本号,为日期形式:YYYY-MM-DD,本版本对应为2016-05-11 /// </summary> public string Version { get; } = "2014-11-11"; /// <summary> /// 阿里云颁发给用户的访问服务所用的密钥ID /// </summary> public string AccessKeyId { get; set; } = "****************"; /// <summary> /// 签名结果串 /// </summary> public string Signature { get; set; } /// <summary> /// 签名方式,目前支持HMAC-SHA1 /// </summary> public string SignatureMethod { get; } = "HMAC-SHA1"; /// <summary> /// 请求的时间戳。日期格式按照ISO8601标准表示,并需要使用UTC时间。格式为YYYY-MM-DDThh:mm:ssZ例如,2015-01-09T12:00:00Z(为UTC时间2015年1月9日12点0分0秒) /// </summary> public string Timestamp { get; set; } = DateTime.UtcNow.ToString("yyyy-MM-ddTHH:mm:ssZ"); /// <summary> /// 签名算法版本,目前版本是1.0 /// </summary> public string SignatureVersion { get; } = "1.0"; /// <summary> /// 唯一随机数,用于防止网络重放攻击。用户在不同请求间要使用不同的随机数值 /// </summary> public string SignatureNonce { get; } = Guid.NewGuid().ToString(); /// <summary> /// /// </summary> private readonly HttpMethod _httpMethod; /// <summary> /// 阿里云颁发给用户的访问服务所用的密钥 /// </summary> private string AccessKeySecret { get; set; } = "******************"; /// <summary> /// /// </summary> private readonly Dictionary<string, string> _parameters; public RequestHelper(HttpMethod httpMethod, Dictionary<string, string> parameters) { _httpMethod = httpMethod; _parameters = parameters; } private void BuildParameters() { _parameters.Add(nameof(Format), Format.ToUpper()); _parameters.Add(nameof(Version), Version); _parameters.Add(nameof(AccessKeyId), AccessKeyId); _parameters.Add(nameof(SignatureVersion), SignatureVersion); _parameters.Add(nameof(SignatureMethod), SignatureMethod); _parameters.Add(nameof(SignatureNonce), SignatureNonce); _parameters.Add(nameof(Timestamp), Timestamp); } public void ComputeSignature() { BuildParameters(); var canonicalizedQueryString = string.Join("&", _parameters.OrderBy(x => x.Key) .Select(x => PercentEncode(x.Key) + "=" + PercentEncode(x.Value))); var stringToSign = _httpMethod.ToString().ToUpper() + "&%2F&" + PercentEncode(canonicalizedQueryString); var keyBytes = Encoding.UTF8.GetBytes(AccessKeySecret + "&"); var hmac = new HMACSHA1(keyBytes); var hashBytes = hmac.ComputeHash(Encoding.UTF8.GetBytes(stringToSign)); Signature = Convert.ToBase64String(hashBytes); _parameters.Add(nameof(Signature), Signature); } private string PercentEncode(string value) { return UpperCaseUrlEncode(value) .Replace("+", "%20") .Replace("*", "%2A") .Replace("%7E", "~"); } private static string UpperCaseUrlEncode(string s) { char[] temp = HttpUtility.UrlEncode(s).ToCharArray(); for (int i = 0; i < temp.Length - 2; i++) { if (temp[i] == '%') { temp[i + 1] = char.ToUpper(temp[i + 1]); temp[i + 2] = char.ToUpper(temp[i + 2]); } } return new string(temp); } public string GetUrl(string url) { ComputeSignature(); return "http://"+ url + "/?" + string.Join("&", _parameters.Select(x => x.Key + "=" + HttpUtility.UrlEncode(x.Value))); } } }
调用方法:
private static async void CheckDomain(string domain= "cdn.aliyuncs.com") { var parameters = new Dictionary<string, string>() { {"Action", "DescribeDomainSrcFlowData"}, }; var request = new RequestHelper(HttpMethod.Get, parameters); var url = request.GetUrl(domain); string result; using (var httpClient = new HttpClient()) { var response = await httpClient.GetAsync(url); // response.EnsureSuccessStatusCode(); result = await response.Content.ReadAsStringAsync(); //剩下的该干嘛干嘛 } }
结果: