如何用.Net Core实现第三方QQ扫码登录功能？

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目录+效果展示：+核心实现+展示二维码+解析扫码结果+登录视图+登录授权+配置Cookie认证策略+创建用户登录标识+用户退出登录+代码开源+效果展示：+核心实现+展示二维码+public static (S)

目录

• 效果展示：
• 核心实现
• 展示二维码
• 解析扫码结果
• 登录视图
• 登录授权
• 配置Cookie认证策略
• 创建用户登录标识
• 用户退出登录
• 代码开源

效果展示：

核心实现

展示二维码

public static (Stream, string) GetLoginQrCode() { var uri = new Uri(QrCodeUrl); var request = new HttpRequestMessage(HttpMethod.Get, uri); var cookieContainer = new CookieContainer(); var handler = new HttpClientHandler { CookieContainer = cookieContainer, AllowAutoRedirect = true, UseCookies = true }; using var client = new HttpClient(handler); var response = client.Send(request); var stream = response.Content.ReadAsStreamAsync().Result; var cookies = cookieContainer.GetCookies(uri).ToList(); var qrsig = cookies.FirstOrDefault(x => x.Name == "qrsig")?.Value; return (stream, qrsig); }

解析扫码结果

public static (bool, string, ScanResult) GetQqScanResult(string qrsig) { var timeStamp = GetTimeStamp(); var ptqrToken = ParsePtqrToken(qrsig); var uri = new Uri(string.Format(ScanResultUrl, ptqrToken, timeStamp)); var request = new HttpRequestMessage(HttpMethod.Get, uri); var cookieContainer = new CookieContainer(); cookieContainer.Add(new Cookie("qrsig", qrsig) { Domain = uri.Host }); var handler = new HttpClientHandler { CookieContainer = cookieContainer, AllowAutoRedirect = true, UseCookies = true }; using var client = new HttpClient(handler); var response = client.Send(request); var content = response.Content.ReadAsStringAsync().Result; var result = ParsePtuiCbResult(content); return result[0] == "0" ? (true, result[4], new ScanResult(ParseQqNumber(result[2]), result[5])) : (false, result[4], null); }

登录视图

<h1>QQ Scan Login</h1> <img src="@Url.Action("QrCode")" width="350" alt="二维码失效？点击刷新" onclick="javascript:this.src += '?_t='+ Math.random();" style="cursor: pointer;" /> <h1>QQ Scan Result</h1> <textarea rows="3" cols="45" id="result"></textarea> <form asp-action="Login" method="post" id="loginForm"> <input type="hidden" name="nick" id="nickName" /> <input type="hidden" name="number" id="qqNumber" /> </form>

登录授权

配置Cookie认证策略

services.AddAuthentication(CookieAuthenticationDefaults.AuthenticationScheme) .AddCookie(options => { // options.Cookie.HttpOnly = true; // options.ExpireTimeSpan = TimeSpan.FromHours(2); // options.SlidingExpiration = true; options.LoginPath = "/Account/Login"; options.AccessDeniedPath = "/Account/Login"; });

不要忘记使用策略：app.UseAuthentication();

创建用户登录标识

if (ModelState.IsValid) { // 创建用户登录标识，Cookie名称与IServiceCollection中配置的一样即可 var identity = new ClaimsIdentity(CookieAuthenticationDefaults.AuthenticationScheme); // 添加之后，可使用User.Identity.Name获取该值 identity.AddClaim(new Claim(ClaimTypes.Name, model.Nick)); // identity中还可以添加自定义数据 identity.AddClaim(new Claim("qq", model.Number)); // var customValue = User.Claims.SingleOrDefault(s => s.Type == "qq").Value; await HttpContext.SignInAsync(new ClaimsPrincipal(identity)); return Redirect("~/"); }

用户退出登录

await HttpContext.SignOutAsync();

代码开源

github.com/Run2948/QQScanLogin

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