asp.net 集成QQ2.0 登陆代码示例

using System;
using System.Web;
using System.Net;
using System.Text;
using System.IO;
using System.Collections.Specialized;
using System.Text.RegularExpressions;
using System.Xml;
using System.Data;
using System.Collections;
using Game.Facade;
using Game.Kernel;
using Game.Entity.Accounts;
using Game.Utils;

public partial class _Default : System.Web.UI.Page
{

protected void Page_Load(object sender, EventArgs e)
{
string redirecturl = System.Configuration.ConfigurationManager.AppSettings["redirecturl"];
//申请QQ登录成功后，分配给应用的appid
string app_id = System.Configuration.ConfigurationManager.AppSettings["appid"];
//申请QQ登录成功后，分配给网站的appkey
string app_key = System.Configuration.ConfigurationManager.AppSettings["appkey"];
string strOpenId = Request.QueryString["openid"] ?? string.Empty;
if (strOpenId.Length <= 0)
{
//Step1：获取Authorization Code
string code = Request.QueryString["code"];
if (string.IsNullOrEmpty(code))
{
//state参数用于防止CSRF攻击，成功授权后回调时会原样带回
Session["state"] = GenerateRndNonce();//md5(uniqid(rand(), TRUE));
//拼接URL
string dialog_url = "https://graph.qq.com/oauth2.0/authorize?response_type=code&client_id="
+ app_id + "&redirect_uri=" + Server.UrlEncode(redirecturl) + "&state="
+ Session["state"];
Response.Write("<script> location.href='" + dialog_url + "'</script>");
Response.End();
}
//Step2：通过Authorization Code获取Access Token
if (Request["state"].ToString().Equals(Session["state"].ToString()))
{
//拼接URL
string token_url = "https://graph.qq.com/oauth2.0/token?grant_type=authorization_code&"
+ "client_id=" + app_id + "&redirect_uri=" + redirecturl
+ "&client_secret=" + app_key + "&code=" + code;
string response = file_get_contents(token_url, Encoding.UTF8);
NameValueCollection msg;
if (response.IndexOf("callback") != -1)
{
int lpos = response.IndexOf("(");
int rpos = response.IndexOf(")");
response = response.Substring(lpos + 1, rpos - lpos - 1);
msg = ParseJson(response);
if (!string.IsNullOrEmpty(msg["error"]))
{
Response.Write("<script>" + "QQ第三方登录step2失败：" + msg["error"] + "\n" + msg["error_description"] + "</script>");
Response.Write("<script>window.close();</script>");
Response.End();
}
}

//Step3：使用Access Token来获取用户的OpenID
NameValueCollection ps = ParseUrlParameters(response);
string graph_url = "https://graph.qq.com/oauth2.0/me?access_token=" + ps["access_token"];
string str = file_get_contents(graph_url, Encoding.UTF8);
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"]))
{
Response.Write("<script>" + "QQ第三方登录step3失败：" + user["error"] + "\n" + user["error_description"] + "</script>");
Response.Write("<script>window.close();</script>");
Response.End();
}
//Step4:通过access_token，appid，openid获得用户信息
string openid = user["openid"];
string get_user_info_url = "https://graph.qq.com/user/get_user_info?access_token=" + ps["access_token"]
+ "&oauth_consumer_key=" + user["client_id"]
+ "&openid=" + openid + "&format=xml";
string userInfo = file_get_contents(get_user_info_url, Encoding.UTF8);

//NameValueCollection nvUserInfo = ParseJson(userInfo);
XmlDocument xml = new XmlDocument();
xml.LoadXml(userInfo);
XmlNodeList sectionNodeList = xml.GetElementsByTagName("data");
string nickname = string.Empty;
if (sectionNodeList[0].ChildNodes[2] == null)
{
Response.Write("<script>" + "QQ第三方登录step4失败：" + sectionNodeList[0].ChildNodes[1].Name + "\n"
+ sectionNodeList[0].ChildNodes[1].InnerXml + "</script>");
Response.Write("<script>window.close();</script>");
Response.End();
}
string ret = sectionNodeList[0].ChildNodes[0].InnerText;
string msg1 = sectionNodeList[0].ChildNodes[1].InnerText;
nickname = sectionNodeList[0].ChildNodes[2].InnerText;
string figureurl = sectionNodeList[0].ChildNodes[3].InnerText;
string gender = sectionNodeList[0].ChildNodes[8].InnerText;
//到这里就获得了QQ用户的昵称（保存在nickname)，和openId保存在(user["openid"]);
//接下来可以判断数据库中是否有此openid,有就登录，没有就注册然后登录
//注册的时候数据库中要加一张表userid,openid这样的绑定关系表
//下次用户再次登录的时候先找表中是否已经有openid,如果有的话就取出对应的userid登录
bool isExit = false;
AccountsFacade accountsFacade = new AccountsFacade();
DataTable dt1 = accountsFacade.LoginByQQ(openid, out isExit);
if (isExit)
{
string userName = dt1.Rows[0]["Accounts"].ToString();
string userPass = dt1.Rows[0]["LogonPass"].ToString();
//直接登录
Message umsg = accountsFacade.Logon(userName, userPass,true);
UserInfo ui = umsg.EntityList[0] as UserInfo;
ui.LogonPass = TextEncrypt.EncryptPassword(userPass);
Fetch.SetUserCookie(ui.ToUserTicketInfo());
Response.Redirect("/Member/MIndex.aspx");
Response.End();
}
else
{
//注册并生成用户名和密码
gender = gender=="男"?"1":"0";
Response.Redirect(string.Format("Register.aspx?isByQq=1&nickname={0}&gender={1}&openid={2}", nickname, gender,openid));
Response.End();
}

}
}
}

private static Random RndSeed = new Random();

public string GenerateRndNonce()
{
return (RndSeed.Next(1, 0xf423f).ToString("000000") + RndSeed.Next(1, 0xf423f).ToString("000000"));
}

public string file_get_contents(string url, Encoding encode)
{
HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(url);
WebResponse response = request.GetResponse();
using (MemoryStream ms = new MemoryStream())
{
using (Stream stream = response.GetResponseStream())
{
int readc;
byte[] buffer = new byte[1024];
while ((readc = stream.Read(buffer, 0, buffer.Length)) > 0)
{
ms.Write(buffer, 0, readc);
}
}
return encode.GetString(ms.ToArray());
}
}

NameValueCollection ParseJson(string json_code)
{
NameValueCollection mc = new NameValueCollection();
Regex regex = new Regex(@"(\s*\""?([^""]*)\""?\s*\:\s*\""?([^""]*)\""?\,?)");
json_code = json_code.Trim();
if (json_code.StartsWith("{"))
{
json_code = json_code.Substring(1, json_code.Length - 2);
}

foreach (Match m in regex.Matches(json_code))
{
mc.Add(m.Groups[2].Value, m.Groups[3].Value);
}
return mc;
}

NameValueCollection ParseUrlParameters(string str_params)
{
NameValueCollection nc = new NameValueCollection();
foreach (string p in str_params.Split('&'))
{
string[] p_s = p.Split('=');
nc.Add(p_s[0], p_s[1]);
}
return nc;
}
}