C# 获取社会统一信用代码
时间不多，废话少说：
网络请求代码如下：
using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Net.Security; using System.Security.Cryptography.X509Certificates; using System.DirectoryServices.Protocols; using System.ServiceModel.Security; using System.Net; using System.IO; using System.IO.Compression; using System.Text.RegularExpressions; using System.Threading; namespace Meeting.Common { /// <summary> /// 有关HTTP请求的辅助类 /// </summary> public class HttpWebResponseUtility { public static string GetUrl(string url) { if (url.StartsWith("https", StringComparison.OrdinalIgnoreCase)) { System.Console.WriteLine("https connections....."); ServicePointManager.ServerCertificateValidationCallback = new RemoteCertificateValidationCallback(CheckValidationResult); // 这里设置了协议类型。 //ServicePointManager.SecurityProtocol =SecurityProtocolType.Tls12;// (SecurityProtocolType)3072;// SecurityProtocolType.Tls1.2; ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12; //(SecurityProtocolType)768 | (SecurityProtocolType)3072 ServicePointManager.CheckCertificateRevocationList = true; ServicePointManager.DefaultConnectionLimit = 1000; ServicePointManager.Expect100Continue = false; } HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest; //增加下面两个属性即可 request.KeepAlive = false; request.ProtocolVersion = HttpVersion.Version10; request.Method = "GET"; //使用get方式发送数据 request.ContentType = "application/x-www-form-urlencoded"; request.Referer = ""; request.AllowAutoRedirect = true; request.UserAgent = "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.2; .NET CLR 1.1.4322; .NET CLR 2.0.50727)"; request.Accept = "*/*"; //获取网页响应结果 HttpWebResponse response = (HttpWebResponse)request.GetResponse(); // Thread.Sleep(2000); Stream stream = response.GetResponseStream(); //client.Headers.Add("Content-Type", "application/x-www-form-urlencoded"); string result = string.Empty; using (StreamReader sr = new StreamReader(stream)) { result = sr.ReadToEnd(); } if (request != null) { request.Abort(); } if (response != null) { response.Close(); } return result; } private static readonly string DefaultUserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; SV1; .NET CLR 1.1.4322; .NET CLR 2.0.50727)"; /// <summary> /// 创建GET方式的HTTP请求 /// </summary> /// <param name="url">请求的URL</param> /// <param name="timeout">请求的超时时间</param> /// <param name="userAgent">请求的客户端浏览器信息，可以为空</param> /// <param name="cookies">随同HTTP请求发送的Cookie信息，如果不需要身份验证可以为空</param> /// <returns></returns> public static HttpWebResponse CreateGetHttpResponse(string url, int? timeout, string userAgent, CookieCollection cookies) { if (string.IsNullOrEmpty(url)) { throw new ArgumentNullException("url"); } HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest; request.Method = "GET"; request.UserAgent = DefaultUserAgent; if (!string.IsNullOrEmpty(userAgent)) { request.UserAgent = userAgent; } if (timeout.HasValue) { request.Timeout = timeout.Value; } if (cookies != null) { request.CookieContainer = new CookieContainer(); request.CookieContainer.Add(cookies); } return request.GetResponse() as HttpWebResponse; } /// <summary> /// 创建POST方式的HTTP请求 /// </summary> /// <param name="url">请求的URL</param> /// <param name="parameters">随同请求POST的参数名称及参数值字典</param> /// <param name="timeout">请求的超时时间</param> /// <param name="userAgent">请求的客户端浏览器信息，可以为空</param> /// <param name="requestEncoding">发送HTTP请求时所用的编码</param> /// <param name="cookies">随同HTTP请求发送的Cookie信息，如果不需要身份验证可以为空</param> /// <returns></returns> public static HttpWebResponse CreatePostHttpResponse(string url, IDictionary<string, string> parameters, int? timeout, string userAgent, Encoding requestEncoding, CookieCollection cookies) { if (string.IsNullOrEmpty(url)) { throw new ArgumentNullException("url"); } if (requestEncoding == null) { throw new ArgumentNullException("requestEncoding"); } HttpWebRequest request = null; //如果是发送HTTPS请求 if (url.StartsWith("https", StringComparison.OrdinalIgnoreCase)) { ServicePointManager.ServerCertificateValidationCallback = new RemoteCertificateValidationCallback(CheckValidationResult); request = WebRequest.Create(url) as HttpWebRequest; request.ProtocolVersion = HttpVersion.Version10; } else { request = WebRequest.Create(url) as HttpWebRequest; } request.Method = "POST"; request.ContentType = "application/x-www-form-urlencoded"; if (!string.IsNullOrEmpty(userAgent)) { request.UserAgent = userAgent; } else { request.UserAgent = DefaultUserAgent; } if (timeout.HasValue) { request.Timeout = timeout.Value; } if (cookies != null) { request.CookieContainer = new CookieContainer(); request.CookieContainer.Add(cookies); } //如果需要POST数据 if (!(parameters == null || parameters.Count == 0)) { StringBuilder buffer = new StringBuilder(); int i = 0; foreach (string key in parameters.Keys) { if (i > 0) { buffer.AppendFormat("&{0}={1}", key, parameters[key]); } else { buffer.AppendFormat("{0}={1}", key, parameters[key]); } i++; } byte[] data = requestEncoding.GetBytes(buffer.ToString()); using (Stream stream = request.GetRequestStream()) { stream.Write(data, 0, data.Length); } } return request.GetResponse() as HttpWebResponse; } private static bool CheckValidationResult(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors errors) { return true; //总是接受 } } }
执行代码如下：
public static void GetLinceNo() { using (TPMSEntities context = new TPMSEntities()) { List<dc_cb_SupplierLinceNo> lst = new List<dc_cb_SupplierLinceNo>(); var data = context.dc_p_Provider_temp2019.ToList(); foreach(var item in data) { if (!string.IsNullOrEmpty(item.LicenceNo)) { continue; } string uri = string.Format("https://www.creditchina.gov.cn/api/public_search/getCreditCodeFacade?keyword={0}&_={1}", item.SupplierName, GetTimestamp(DateTime.Now)); var json = HttpWebResponseUtility.GetUrl(uri); if (!string.IsNullOrEmpty(json)) { try { var jsonResult = JsonConvert.DeserializeObject<res>(json); if (jsonResult != null && jsonResult.result != null && jsonResult.result.results != null) { var model = jsonResult.result.results.Where(A => A.entName == item.SupplierName).FirstOrDefault(); if (model == null) { continue; } string credCode = model.credCode; dc_cb_SupplierLinceNo d = new dc_cb_SupplierLinceNo(); d.SupplierName = item.SupplierName; d.LinceNo = credCode; context.dc_cb_SupplierLinceNo.Add(d); context.SaveChanges(); } else { continue; } } catch(Exception ex) { continue; } } else { continue; } } //using (var Transaction = context.Database.BeginTransaction()) //{ // try // { // Transaction.Commit(); // } // catch (Exception ex) // { // Transaction.Rollback(); // } //} } } public static string GetTimestamp(DateTime d) { TimeSpan ts = d - new DateTime(1970, 1, 1); return ts.TotalMilliseconds.ToString(); } #endregion public class res { public resultCls result { get; set; } public int totalPageCount { get; set; } } public class resultCls { public string start { get; set; } public string pageSize { get; set; } public string totalCount { get; set; } public List<resultsCls> results { get; set; } public string exportButtonValid { get; set; } public string currentPageNo { get; set; } public string page { get; set; } public string totalPageCount { get; set; } } public class resultsCls { public string id { get; set; } public string entName { get; set; } public string credCode { get; set; } public string regCode { get; set; } public string orgCode { get; set; } public string taxCode { get; set; } public string status { get; set; } public string modifyDate { get; set; } public string md5 { get; set; } public string rank { get; set; } public string solrStatus { get; set; } public string validTime { get; set; } }
虽说免费，但是这个方法服务端会限制请求的次数！
@陈卧龙的博客
