421 lines
16 KiB
C#
421 lines
16 KiB
C#
using System.Net;
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using System.Net.Security;
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using System.Security.Cryptography;
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using System.Security.Cryptography.X509Certificates;
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using System.Text;
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namespace HttpUtil
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{
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public class HttpUtillib
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{
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/// <summary>
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/// 设置信息参数
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/// </summary>
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/// <param name="appkey">合作方APPKey</param>
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/// <param name="secret">合作方APPSecret</param>
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/// <param name="ip">平台IP</param>
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/// <param name="port">平台端口，默认HTTPS的443端口</param>
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/// <param name="isHttps">是否启用HTTPS协议，默认HTTPS</param>
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/// <return></return>
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public static void SetPlatformInfo(string appkey, string secret, string ip, int port = 443, bool isHttps = true)
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{
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_appkey = appkey;
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_secret = secret;
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_ip = ip;
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_port = port;
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_isHttps = isHttps;
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// 设置并发数，如不设置默认为2
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ServicePointManager.DefaultConnectionLimit = 512;
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}
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/// <summary>
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/// HTTP GET请求
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/// </summary>
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/// <param name="uri">HTTP接口Url，不带协议和端口，如/artemis/api/resource/v1/cameras/indexCode?cameraIndexCode=a10cafaa777c49a5af92c165c95970e0</param>
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/// <param name="timeout">请求超时时间，单位：秒</param>
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/// <returns></returns>
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public static byte[] HttpGet(string uri, int timeout)
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{
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Dictionary<string, string> header = new Dictionary<string, string>();
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// 初始化请求：组装请求头，设置远程证书自动验证通过
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initRequest(header, uri, "", false);
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// build web request object
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StringBuilder sb = new StringBuilder();
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sb.Append(_isHttps ? "https://" : "http://").Append(_ip).Append(":").Append(_port.ToString()).Append(uri);
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HttpWebRequest req = (HttpWebRequest)HttpWebRequest.Create(sb.ToString());
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req.KeepAlive = false;
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req.ProtocolVersion = HttpVersion.Version11;
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req.AllowAutoRedirect = false; // 不允许自动重定向
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req.Method = "GET";
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req.Timeout = timeout * 1000; // 传入是秒，需要转换成毫秒
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req.Accept = header["Accept"];
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req.ContentType = header["Content-Type"];
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foreach (string headerKey in header.Keys)
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{
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if (headerKey.Contains("x-ca-"))
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{
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req.Headers.Add(headerKey + ":" + header[headerKey]);
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}
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}
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HttpWebResponse rsp = null;
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try
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{
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rsp = (HttpWebResponse)req.GetResponse();
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if (HttpStatusCode.OK == rsp.StatusCode)
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{
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Stream rspStream = rsp.GetResponseStream(); // 响应内容字节流
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StreamReader sr = new StreamReader(rspStream);
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string strStream = sr.ReadToEnd();
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long streamLength = strStream.Length;
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byte[] response = System.Text.Encoding.UTF8.GetBytes(strStream);
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rsp.Close();
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return response;
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}
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else if (HttpStatusCode.Found == rsp.StatusCode || HttpStatusCode.Moved == rsp.StatusCode) // 302/301 redirect
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{
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string reqUrl = rsp.Headers["Location"].ToString(); // 获取重定向URL
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WebRequest wreq = WebRequest.Create(reqUrl); // 重定向请求对象
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WebResponse wrsp = wreq.GetResponse(); // 重定向响应
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long streamLength = wrsp.ContentLength; // 重定向响应内容长度
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Stream rspStream = wrsp.GetResponseStream(); // 响应内容字节流
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byte[] response = new byte[streamLength];
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rspStream.Read(response, 0, (int)streamLength); // 读取响应内容至byte数组
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rspStream.Close();
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rsp.Close();
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return response;
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}
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rsp.Close();
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}
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catch (WebException e)
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{
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if (rsp != null)
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{
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rsp.Close();
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}
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}
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return null;
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}
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/// <summary>
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/// HTTP Post请求
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/// </summary>
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/// <param name="uri">HTTP接口Url，不带协议和端口，如/artemis/api/resource/v1/org/advance/orgList</param>
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/// <param name="body">请求参数</param>
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/// <param name="timeout">请求超时时间，单位：秒</param>
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/// <return>请求结果</return>
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public static byte[] HttpPost(string uri, string body, int timeout)
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{
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Dictionary<string, string> header = new Dictionary<string, string>();
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// 初始化请求：组装请求头，设置远程证书自动验证通过
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initRequest(header, uri, body, true);
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// build web request object
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StringBuilder sb = new StringBuilder();
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sb.Append(_isHttps ? "https://" : "http://").Append(_ip).Append(":").Append(_port.ToString()).Append(uri);
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// 创建POST请求
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HttpWebRequest req = (HttpWebRequest)HttpWebRequest.Create(sb.ToString());
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req.KeepAlive = false;
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req.ProtocolVersion = HttpVersion.Version11;
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req.AllowAutoRedirect = false; // 不允许自动重定向
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req.Method = "POST";
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req.Timeout = timeout * 1000; // 传入是秒，需要转换成毫秒
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req.Accept = header["Accept"];
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req.ContentType = header["Content-Type"];
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foreach (string headerKey in header.Keys)
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{
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if (headerKey.Contains("x-ca-"))
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{
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req.Headers.Add(headerKey + ":" + header[headerKey]);
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}
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}
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if (!string.IsNullOrWhiteSpace(body))
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{
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byte[] postBytes = Encoding.UTF8.GetBytes(body);
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req.ContentLength = postBytes.Length;
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Stream reqStream = null;
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try
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{
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reqStream = req.GetRequestStream();
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reqStream.Write(postBytes, 0, postBytes.Length);
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reqStream.Close();
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}
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catch (WebException e)
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{
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if (reqStream != null)
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{
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reqStream.Close();
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}
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return null;
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}
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}
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HttpWebResponse rsp = null;
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try
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{
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rsp = (HttpWebResponse)req.GetResponse();
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if (HttpStatusCode.OK == rsp.StatusCode)
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{
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Stream rspStream = rsp.GetResponseStream();
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StreamReader sr = new StreamReader(rspStream);
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string strStream = sr.ReadToEnd();
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long streamLength = strStream.Length;
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byte[] response = System.Text.Encoding.UTF8.GetBytes(strStream);
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rsp.Close();
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return response;
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}
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else if (HttpStatusCode.Found == rsp.StatusCode || HttpStatusCode.Moved == rsp.StatusCode) // 302/301 redirect
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{
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try
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{
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string reqUrl = rsp.Headers["Location"].ToString(); // 如需要重定向URL，请自行修改接口返回此参数
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rsp.Close();
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WebRequest wreq = WebRequest.Create(reqUrl);
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rsp = (HttpWebResponse)wreq.GetResponse();
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Stream rspStream = rsp.GetResponseStream();
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long streamLength = rsp.ContentLength;
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int offset = 0;
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byte[] response = new byte[streamLength];
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while (streamLength > 0)
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{
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int n = rspStream.Read(response, offset, (int)streamLength);
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if (0 == n)
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{
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break;
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}
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offset += n;
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streamLength -= n;
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}
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return response;
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}
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catch (Exception e)
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{
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rsp.Close();
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return null;
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}
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}
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rsp.Close();
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}
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catch (WebException e)
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{
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if (rsp != null)
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{
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rsp.Close();
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}
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}
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return null;
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}
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private static void initRequest(Dictionary<string, string> header, string url, string body, bool isPost)
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{
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// Accept
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string accept = "application/json"; // "*/*";
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header.Add("Accept", accept);
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// ContentType
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string contentType = "application/json";
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header.Add("Content-Type", contentType);
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if (isPost)
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{
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// content-md5，be careful it must be lower case.
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string contentMd5 = computeContentMd5(body);
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header.Add("content-md5", contentMd5);
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}
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// x-ca-timestamp
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string timestamp = ((DateTime.Now.Ticks - TimeZone.CurrentTimeZone.ToLocalTime(new System.DateTime(1970, 1, 1, 0, 0, 0, 0)).Ticks) / 1000).ToString();
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header.Add("x-ca-timestamp", timestamp);
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// x-ca-nonce
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string nonce = System.Guid.NewGuid().ToString();
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header.Add("x-ca-nonce", nonce);
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// x-ca-key
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header.Add("x-ca-key", _appkey);
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// build string to sign
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string strToSign = buildSignString(isPost ? "POST" : "GET", url, header);
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string signedStr = computeForHMACSHA256(strToSign, _secret);
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// x-ca-signature
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header.Add("x-ca-signature", signedStr);
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if (_isHttps)
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{
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// set remote certificate Validation auto pass
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ServicePointManager.ServerCertificateValidationCallback = new System.Net.Security.RemoteCertificateValidationCallback(remoteCertificateValidate);
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// FIX：修复不同.Net版对一些SecurityProtocolType枚举支持情况不一致导致编译失败等问题，这里统一使用数值
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//(SecurityProtocolType)48 |
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ServicePointManager.SecurityProtocol = (SecurityProtocolType)3072 | (SecurityProtocolType)768 | (SecurityProtocolType)192;
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//ServicePointManager.SecurityProtocol = SecurityProtocolType.Ssl3 | SecurityProtocolType.Tls12 | SecurityProtocolType.Tls11 | SecurityProtocolType.Tls;
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}
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}
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/// <summary>
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/// 计算content-md5
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/// </summary>
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/// <param name="body"></param>
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/// <returns>base64后的content-md5</returns>
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private static string computeContentMd5(string body)
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{
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MD5 md5 = new MD5CryptoServiceProvider();
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byte[] result = md5.ComputeHash(System.Text.Encoding.UTF8.GetBytes(body));
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return Convert.ToBase64String(result);
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}
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/// <summary>
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/// 远程证书验证
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/// </summary>
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/// <param name="sender"></param>
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/// <param name="cert"></param>
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/// <param name="chain"></param>
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/// <param name="error"></param>
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/// <returns>验证是否通过，始终通过</returns>
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private static bool remoteCertificateValidate(object sender, X509Certificate cert, X509Chain chain, SslPolicyErrors error)
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{
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return true;
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}
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/// <summary>
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/// 计算HMACSHA265
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/// </summary>
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/// <param name="str">待计算字符串</param>
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/// <param name="secret">平台APPSecet</param>
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/// <returns>HMAXH265计算结果字符串</returns>
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private static string computeForHMACSHA256(string str, string secret)
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{
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var encoder = new System.Text.UTF8Encoding();
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byte[] secretBytes = encoder.GetBytes(secret);
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byte[] strBytes = encoder.GetBytes(str);
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var opertor = new HMACSHA256(secretBytes);
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byte[] hashbytes = opertor.ComputeHash(strBytes);
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return Convert.ToBase64String(hashbytes);
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}
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/// <summary>
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/// 计算签名字符串
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/// </summary>
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/// <param name="method">HTTP请求方法，如“POST”</param>
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/// <param name="url">接口Url，如/artemis/api/resource/v1/org/advance/orgList</param>
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/// <param name="header">请求头</param>
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/// <returns>签名字符串</returns>
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private static string buildSignString(string method, string url, Dictionary<string, string> header)
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{
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StringBuilder sb = new StringBuilder();
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sb.Append(method.ToUpper()).Append("\n");
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if (null != header)
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{
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if (null != header["Accept"])
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{
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sb.Append((string)header["Accept"]);
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sb.Append("\n");
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}
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if (header.Keys.Contains("Content-MD5") && null != header["Content-MD5"])
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{
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sb.Append((string)header["Content-MD5"]);
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sb.Append("\n");
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}
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if (null != header["Content-Type"])
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{
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sb.Append((string)header["Content-Type"]);
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sb.Append("\n");
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}
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if (header.Keys.Contains("Date") && null != header["Date"])
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{
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sb.Append((string)header["Date"]);
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sb.Append("\n");
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}
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}
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// build and add header to sign
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string signHeader = buildSignHeader(header);
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sb.Append(signHeader);
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sb.Append(url);
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return sb.ToString();
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}
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/// <summary>
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/// 计算签名头
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/// </summary>
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/// <param name="header">请求头</param>
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/// <returns>签名头</returns>
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private static string buildSignHeader(Dictionary<string, string> header)
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{
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Dictionary<string, string> sortedDicHeader = new Dictionary<string, string>();
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sortedDicHeader = header;
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var dic = from objDic in sortedDicHeader orderby objDic.Key ascending select objDic;
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StringBuilder sbSignHeader = new StringBuilder();
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StringBuilder sb = new StringBuilder();
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foreach (KeyValuePair<string, string> kvp in dic)
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{
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if (kvp.Key.Replace(" ", "").Contains("x-ca-"))
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{
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sb.Append(kvp.Key + ":");
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if (!string.IsNullOrWhiteSpace(kvp.Value))
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{
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sb.Append(kvp.Value);
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}
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sb.Append("\n");
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if (sbSignHeader.Length > 0)
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{
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sbSignHeader.Append(",");
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}
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sbSignHeader.Append(kvp.Key);
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}
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}
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header.Add("x-ca-signature-headers", sbSignHeader.ToString());
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return sb.ToString();
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}
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/// <summary>
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/// 平台ip
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/// </summary>
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private static string _ip;
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/// <summary>
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/// 平台端口
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/// </summary>
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private static int _port = 443;
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/// <summary>
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/// 平台APPKey
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/// </summary>
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private static string _appkey;
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/// <summary>
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/// 平台APPSecret
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/// </summary>
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private static string _secret;
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/// <summary>
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/// 是否使用HTTPS协议
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/// </summary>
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private static bool _isHttps = true;
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}
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} |