第一步，准备工作。获取client id和client secret
1、自行登陆github官网，点击setting，如下图：
2、继续，点击developer settings，如下图：
3、继续，点击oauth apps，如下图：
4、继续，点击new oauth app，如下图：
5、继续，填写完毕后，点击register application，如下图：
6、至此，我们已经成功拿到client id和client secret。另外，此页面还可以更改步骤5填写的相关信息，如下图：
第二步，代码部分。实现github第三方登录
1、login.aspx 代码
<%@ page language="c#" autoeventwireup="true" codebehind="login.aspx.cs" inherits="githublogin.login" %>
<!doctype html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<meta http-equiv="content-type" content="text/html; charset=utf-8"/>
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>
<a href="https://github.com/login/oauth/authorize?client_id=xxxxxxxxxxxxxxxxxxxxxx&state=state&redirect_uri=http://www.kudsu.xyz/">github登录</a>
</div>
</form>
</body>
</html>
2、login.aspx.cs 代码
using newtonsoft.json;
using newtonsoft.json.linq;
using system;
using system.collections.generic;
using system.io;
using system.linq;
using system.net;
using system.net.http;
using system.text;
using system.threading.tasks;
using system.web;
using system.web.ui;
using system.web.ui.webcontrols;
namespace githublogin
{
public partial class login : system.web.ui.page
{
protected void page_load(object sender, eventargs e)
{
if (!ispostback)
{
string code = request.querystring["code"] == null || request.querystring["code"].tostring() == "" ? "" : request.querystring["code"].tostring();
if (code != "")
{
//第二步，获取token
string tokenjson = loadurlstring("https://github.com/login/oauth/access_token?client_id=xxxxxxxxxxxxxxx&client_secret=xxxxxxxxxxxxxxx&code=" + code + "&redirect_uri=http://www.kudsu.xyz/", "post");
jobject jo = (jobject)jsonconvert.deserializeobject(tokenjson);
tokenjson = jo["access_token"].tostring();
//第三步，获取github用户信息
string userjson = loadurlstring("https://api.github.com/user?access_token=" + tokenjson, "get");
//把github用户信息输出到页面上
response.write(userjson);
}
}
}
/// <summary>
/// 请求url
/// </summary>
/// <param name="url">地址</param>
/// <param name="getpost">post、get</param>
/// <returns></returns>
private string loadurlstring(string url, string getpost)
{
system.net.servicepointmanager.securityprotocol = securityprotocoltype.tls12;
httpwebrequest request1 = (httpwebrequest)webrequest.create(url);
request1.method = getpost;
request1.contenttype = "application/json";
request1.accept = "application/json";
request1.headers.add("accept-language", "zh-cn,zh;q=0.8,en-us;q=0.5,en;q=0.3");
request1.useragent = "mozilla/5.0 (windows nt 5.2; rv:12.0) gecko/20100101 firefox/12.0";
return new streamreader(((httpwebresponse)request1.getresponse()).getresponsestream(), encoding.utf8).readtoend();
}
}
}
3、项目地址：https://github.com/kudsu/githublogin
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