ASP.NET实现QQ、微信、新浪微博OAuth2.0授权登录 原创

微信(小程序)  /  管理员 发布于 8年前   225

不管是腾讯还是新浪，查看他们的API，PHP都是有完整的接口，但对C#支持似乎都不是那么完善，都没有，腾讯是完全没有，新浪是提供第三方的，而且后期还不一定升级，NND，用第三方的动辄就一个类库，各种配置还必须按照他们约定的写，烦而且乱，索性自己写，后期的扩展也容易，看过接口后，开始以为很难，参考了几个源码之后发现也不是那么难，无非是GET或POST请求他们的接口获取返回值之类的，话不多说，这里只提供几个代码共参考，抛砖引玉了。。。

我这个写法的特点是，用到了Session，使用对象实例化之后调用 Login() 跳转到登录页面，在回调页面调用Callback() 执行之后，可以从Session也可以写独立的函数（如：GetOpenID()）中获取access_token或用户的唯一标识，以方便做下一步的操作。所谓绑定就是把用户的唯一标识取出，插入数据库，和帐号绑定起来。

1.首先是所有OAuth类的基类，放一些需要公用的方法

public abstract class BaseOAuth{  public HttpRequest Request = HttpContext.Current.Request;  public HttpResponse Response = HttpContext.Current.Response;  public HttpSessionState Session = HttpContext.Current.Session;  public abstract void Login();  public abstract string Callback();  #region 内部使用函数  /// <summary>  /// 生成唯一随机串防CSRF攻击  /// </summary>  /// <returns></returns>  protected string GetStateCode()  {    Random rand = new Random();    string data = DateTime.Now.ToString("yyyyMMddHHmmssffff") + rand.Next(1, 0xf423f).ToString();    MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider();    byte[] md5byte = md5.ComputeHash(UTF8Encoding.Default.GetBytes(data));    return BitConverter.ToString(md5byte).Replace("-", "");  }  /// <summary>  /// GET请求  /// </summary>  /// <param name="url"></param>  /// <returns></returns>  protected string GetRequest(string url)  {    HttpWebRequest httpWebRequest = System.Net.WebRequest.Create(url) as HttpWebRequest;    httpWebRequest.Method = "GET";    httpWebRequest.ServicePoint.Expect100Continue = false;    StreamReader responseReader = null;    string responseData;    try    {      responseReader = new StreamReader(httpWebRequest.GetResponse().GetResponseStream());      responseData = responseReader.ReadToEnd();    }    finally    {      httpWebRequest.GetResponse().GetResponseStream().Close();      responseReader.Close();    }    return responseData;  }  /// <summary>  /// POST请求  /// </summary>  /// <param name="url"></param>  /// <param name="postData"></param>  /// <returns></returns>  protected string PostRequest(string url, string postData)  {    HttpWebRequest httpWebRequest = System.Net.WebRequest.Create(url) as HttpWebRequest;    httpWebRequest.Method = "POST";    httpWebRequest.ServicePoint.Expect100Continue = false;    httpWebRequest.ContentType = "application/x-www-form-urlencoded";    //写入POST参数    StreamWriter requestWriter = new StreamWriter(httpWebRequest.GetRequestStream());    try    {      requestWriter.Write(postData);    }    finally    {      requestWriter.Close();    }    //读取请求后的结果    StreamReader responseReader = null;    string responseData;    try    {      responseReader = new StreamReader(httpWebRequest.GetResponse().GetResponseStream());      responseData = responseReader.ReadToEnd();    }    finally    {      httpWebRequest.GetResponse().GetResponseStream().Close();      responseReader.Close();    }    return responseData;  }  /// <summary>  /// 解析JSON  /// </summary>  /// <param name="strJson"></param>  /// <returns></returns>  protected NameValueCollection ParseJson(string strJson)  {    NameValueCollection mc = new NameValueCollection();    Regex regex = new Regex(@"(\s*\""?([^""]*)\""?\s*\:\s*\""?([^""]*)\""?\,?)");    strJson = strJson.Trim();    if (strJson.StartsWith("{"))    {      strJson = strJson.Substring(1, strJson.Length - 2);    }    foreach (Match m in regex.Matches(strJson))    {      mc.Add(m.Groups[2].Value, m.Groups[3].Value);    }    return mc;  }  /// <summary>  /// 解析URL  /// </summary>  /// <param name="strParams"></param>  /// <returns></returns>  protected NameValueCollection ParseUrlParameters(string strParams)  {    NameValueCollection nc = new NameValueCollection();    foreach (string p in strParams.Split('&'))    {      string[] ps = p.Split('=');      nc.Add(ps[0], ps[1]);    }    return nc;  }  #endregion}

2.QQ的OAuth类

public class QQOAuth : BaseOAuth{  public string AppId = ConfigurationManager.AppSettings["OAuth_QQ_AppId"];  public string AppKey = ConfigurationManager.AppSettings["OAuth_QQ_AppKey"];  public string RedirectUrl = ConfigurationManager.AppSettings["OAuth_QQ_RedirectUrl"];  public const string GET_AUTH_CODE_URL = "https://graph.qq.com/oauth2.0/authorize";  public const string GET_ACCESS_TOKEN_URL = "https://graph.qq.com/oauth2.0/token";  public const string GET_OPENID_URL = "https://graph.qq.com/oauth2.0/me";  /// <summary>  /// QQ登录，跳转到登录页面  /// </summary>  public override void Login()  {    //-------生成唯一随机串防CSRF攻击    string state = GetStateCode();    Session["QC_State"] = state; //state 放入Session    string parms = "?response_type=code&"      + "client_id=" + AppId + "&redirect_uri=" + Uri.EscapeDataString(RedirectUrl) + "&state=" + state;    string url = GET_AUTH_CODE_URL + parms;    Response.Redirect(url); //跳转到登录页面  }  /// <summary>  /// QQ回调函数  /// </summary>  /// <param name="code"></param>  /// <param name="state"></param>  /// <returns></returns>  public override string Callback()  {    string code = Request.QueryString["code"];    string state = Request.QueryString["state"];    //--------验证state防止CSRF攻击    if (state != (string)Session["QC_State"])    {      ShowError("30001");    }    string parms = "?grant_type=authorization_code&"      + "client_id=" + AppId + "&redirect_uri=" + Uri.EscapeDataString(RedirectUrl)      + "&client_secret=" + AppKey + "&code=" + code;    string url = GET_ACCESS_TOKEN_URL + parms;    string str = GetRequest(url);    if (str.IndexOf("callback") != -1)    {      int lpos = str.IndexOf("(");      int rpos = str.IndexOf(")");      str = str.Substring(lpos + 1, rpos - lpos - 1);      NameValueCollection msg = ParseJson(str);      if (!string.IsNullOrEmpty(msg["error"]))      {        ShowError(msg["error"], msg["error_description"]);      }    }    NameValueCollection token = ParseUrlParameters(str);    Session["QC_AccessToken"] = token["access_token"]; //access_token 放入Session    return token["access_token"];  }  /// <summary>  /// 使用Access Token来获取用户的OpenID  /// </summary>  /// <param name="accessToken"></param>  /// <returns></returns>  public string GetOpenID()  {    string parms = "?access_token=" + Session["QC_AccessToken"];    string url = GET_OPENID_URL + parms;    string str = GetRequest(url);    if (str.IndexOf("callback") != -1)    {      int lpos = str.IndexOf("(");      int rpos = str.IndexOf(")");      str = str.Substring(lpos + 1, rpos - lpos - 1);    }    NameValueCollection user = ParseJson(str);    if (!string.IsNullOrEmpty(user["error"]))    {      ShowError(user["error"], user["error_description"]);    }    Session["QC_OpenId"] = user["openid"]; //openid 放入Session    return user["openid"];  }  /// <summary>  /// 显示错误信息  /// </summary>  /// <param name="code">错误编号</param>  /// <param name="description">错误描述</param>  private void ShowError(string code, string description = null)  {    if (description == null)    {      switch (code)      {        case "20001":          description = "<h2>配置文件损坏或无法读取，请检查web.config</h2>";          break;        case "30001":          description = "<h2>The state does not match. You may be a victim of CSRF.</h2>";          break;        case "50001":          description = "<h2>可能是服务器无法请求https协议</h2>可能未开启curl支持,请尝试开启curl支持，重启web服务器，如果问题仍未解决，请联系我们";          break;        default:          description = "<h2>系统未知错误，请联系我们</h2>";          break;      }      Response.Write(description);      Response.End();    }    else    {      Response.Write("<h3>error:<h3>" + code + "<h3>msg:<h3>" + description);      Response.End();    }  }}

3.新浪微博的OAuth类

public class SinaOAuth : BaseOAuth{  public string AppKey = ConfigurationManager.AppSettings["OAuth_Sina_AppKey"];  public string AppSecret = ConfigurationManager.AppSettings["OAuth_Sina_AppSecret"];  public string RedirectUrl = ConfigurationManager.AppSettings["OAuth_Sina_RedirectUrl"];  public const string GET_AUTH_CODE_URL = "https://api.weibo.com/oauth2/authorize";  public const string GET_ACCESS_TOKEN_URL = "https://api.weibo.com/oauth2/access_token";  public const string GET_UID_URL = "https://api.weibo.com/2/account/get_uid.json";  /// <summary>  /// 新浪微博登录，跳转到登录页面  /// </summary>  public override void Login()  {    //-------生成唯一随机串防CSRF攻击    string state = GetStateCode();    Session["Sina_State"] = state; //state 放入Session    string parms = "?client_id=" + AppKey + "&redirect_uri=" + Uri.EscapeDataString(RedirectUrl)      + "&state=" + state;    string url = GET_AUTH_CODE_URL + parms;    Response.Redirect(url); //跳转到登录页面  }  /// <summary>  /// 新浪微博回调函数  /// </summary>  /// <returns></returns>  public override string Callback()  {    string code = Request.QueryString["code"];    string state = Request.QueryString["state"];    //--------验证state防止CSRF攻击    if (state != (string)Session["Sina_State"])    {      ShowError("The state does not match. You may be a victim of CSRF.");    }    string parms = "client_id=" + AppKey + "&client_secret=" + AppSecret      + "&grant_type=authorization_code&code=" + code + "&redirect_uri=" + Uri.EscapeDataString(RedirectUrl);    string str = PostRequest(GET_ACCESS_TOKEN_URL, parms);    NameValueCollection user = ParseJson(str);    Session["Sina_AccessToken"] = user["access_token"]; //access_token 放入Session    Session["Sina_UId"] = user["uid"]; //uid 放入Session    return user["access_token"];  }  /// <summary>  /// 显示错误信息  /// </summary>  /// <param name="description">错误描述</param>  private void ShowError(string description = null)  {    Response.Write("<h2>" + description + "</h2>");    Response.End();  }}

4.微信的OAuth类

public class WeixinOAuth : BaseOAuth{  public string AppId = ConfigurationManager.AppSettings["OAuth_Weixin_AppId"];  public string AppSecret = ConfigurationManager.AppSettings["OAuth_Weixin_AppSecret"];  public string RedirectUrl = ConfigurationManager.AppSettings["OAuth_Weixin_RedirectUrl"];  public const string GET_AUTH_CODE_URL = "https://open.weixin.qq.com/connect/qrconnect";  public const string GET_ACCESS_TOKEN_URL = "https://api.weixin.qq.com/sns/oauth2/access_token";  public const string GET_USERINFO_URL = "https://api.weixin.qq.com/sns/userinfo";  /// <summary>  /// 微信登录，跳转到登录页面  /// </summary>  public override void Login()  {    //-------生成唯一随机串防CSRF攻击    string state = GetStateCode();    Session["Weixin_State"] = state; //state 放入Session    string parms = "?appid=" + AppId      + "&redirect_uri=" + Uri.EscapeDataString(RedirectUrl) + "&response_type=code&scope=snsapi_login"      + "&state=" + state + "#wechat_redirect";    string url = GET_AUTH_CODE_URL + parms;    Response.Redirect(url); //跳转到登录页面  }  /// <summary>  /// 微信回调函数  /// </summary>  /// <param name="code"></param>  /// <param name="state"></param>  /// <returns></returns>  public override string Callback()  {    string code = Request.QueryString["code"];    string state = Request.QueryString["state"];    //--------验证state防止CSRF攻击    if (state != (string)Session["Weixin_State"])    {      ShowError("30001");    }    string parms = "?appid=" + AppId + "&secret=" + AppSecret      + "&code=" + code + "&grant_type=authorization_code";    string url = GET_ACCESS_TOKEN_URL + parms;    string str = GetRequest(url);    NameValueCollection msg = ParseJson(str);    if (!string.IsNullOrEmpty(msg["errcode"]))    {      ShowError(msg["errcode"], msg["errmsg"]);    }    Session["Weixin_AccessToken"] = msg["access_token"]; //access_token 放入Session    Session["Weixin_OpenId"] = msg["openid"]; //access_token 放入Session    return msg["access_token"];  }  /// <summary>  /// 显示错误信息  /// </summary>  /// <param name="code">错误编号</param>  /// <param name="description">错误描述</param>  private void ShowError(string code, string description = null)  {    if (description == null)    {      switch (code)      {        case "20001":          description = "<h2>配置文件损坏或无法读取，请检查web.config</h2>";          break;        case "30001":          description = "<h2>The state does not match. You may be a victim of CSRF.</h2>";          break;        case "50001":          description = "<h2>接口未授权</h2>";          break;        default:          description = "<h2>系统未知错误，请联系我们</h2>";          break;      }      Response.Write(description);      Response.End();    }    else    {      Response.Write("<h3>error:<h3>" + code + "<h3>msg:<h3>" + description);      Response.End();    }  }}

5.web.config配置信息

<appSettings>    <!--QQ登录相关配置-->    <add key="OAuth_QQ_AppId" value="123456789" />    <add key="OAuth_QQ_AppKey" value="25f9e794323b453885f5181f1b624d0b" />    <add key="OAuth_QQ_RedirectUrl" value="http://www.domain.com/oauth20/qqcallback.aspx" />    <!--新浪微博登录相关配置-->    <add key="OAuth_Sina_AppKey" value="123456789" />    <add key="OAuth_Sina_AppSecret" value="25f9e794323b453885f5181f1b624d0b" />    <add key="OAuth_Sina_RedirectUrl" value="http://www.domain.com/oauth20/sinacallback.aspx" />    <!--微信登录相关配置-->    <add key="OAuth_Weixin_AppId" value="wx123456789123" />    <add key="OAuth_Weixin_AppSecret" value="25f9e794323b453885f5181f1b624d0b" />    <add key="OAuth_Weixin_RedirectUrl" value="http://www.domain.com/oauth20/weixincallback.aspx" /></appSettings>