微信开发模式——获取accesstoken

来源：互联网发布：韩国电影翻译软件编辑：程序博客网时间：2024/05/21 00:16

有些接口必须传递access_token参数，比如创建菜单等，并且这些接口都用调用次数限制

/// <summary>    /// 获取accesstoken 两小时过期 限200（次/天） appid和secret见微信提供    /// </summary>    /// <returns></returns>    private static string GetAccess_token()    {         string loginUrl = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=appid&secret=secret";        Encoding encoding = Encoding.GetEncoding("UTF-8");        HttpWebResponse response =HttpWebResponseUtility.CreateGetHttpResponse(loginUrl, null, null, null);        return Common.GetResponseStr(response);            }

参考文档：http://mp.weixin.qq.com/wiki/index.php?title=%E8%8E%B7%E5%8F%96access_token

需是GET请求，附带一下http/https请求类，这是网上的一篇，出处找不着了，原作者看见联系，我会加上出处

public class HttpWebResponseUtility{    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      }  }

获取微信返回结果

public static string GetResponseStr(HttpWebResponse response)    {        System.IO.Stream stream = response.GetResponseStream();        byte[] rsByte = new Byte[response.ContentLength];         try        {            stream.Read(rsByte, 0, (int)response.ContentLength);            string result = System.Text.Encoding.UTF8.GetString(rsByte, 0, rsByte.Length).ToString();            return result;        }        catch (Exception exp)        {            return exp.ToString();        }    }

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