如何通过ASP.NET实现QQ、微信及新浪ASP.NETOAuth2.0授权登录？
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>
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