public ActionResult GetPreAuthCode()
{
RequestApiResult <WeixinThirdPartyGetPreAuthCodeResult> result =
ThirdPartyApi.GetPreAuthCode(ThirdPartyAccessTokenGetter.Get(), _configuration.ThirdParty.AppId);
if (result.Success)
{
return(RespondDataResult(new
{
AppId = _configuration.ThirdParty.AppId,
PreAuthCode = result.ApiResult.PreAuthCode
}));
}
else
{
ApiResult apiResult = new ApiResult();
apiResult.Message = result.Message;
return(RespondResult(apiResult));
}
}
/// <summary>
///微信网页授权回调
///如果用户同意授权，页面将跳转至 redirect_uri/?code=CODE&state=STATE。
///若用户禁止授权，则重定向后不会带上code参数，仅会带上state参数redirect_uri?state=STATE
///http://mp.weixin.qq.com/wiki/9/01f711493b5a02f24b04365ac5d8fd95.html
/// </summary>
/// <returns></returns>
public ActionResult OAuthCallback()
{
_log.Write("微信网页授权接口发起回调", HttpContext.Request.Url.ToString(), TraceEventType.Verbose);
string code = HttpContext.Request.QueryString["code"];
string state = HttpContext.Request.QueryString["state"];
//第为第三方平台运营时，会返回 appId
string appId = HttpContext.Request.QueryString["appid"];
//完成网页鉴权后要转回的页面地址
string redirectUrl = null;
if (String.IsNullOrEmpty(state) == false)
{
redirectUrl = _cachingService.Get(state);
}
else
{
_log.Write("微信网页授权接口发起回调",
"没有指定完成网页鉴权后要转回的页面地址： state" + HttpContext.Request.Url.ToString(),
TraceEventType.Warning);
return(new HttpStatusCodeResult(404));
}
string domainId = HttpContext.Request.QueryString["domainId"];
if (String.IsNullOrEmpty(domainId))
{
_log.Write("微信网页授权接口发起回调", "没有指定 domainId ", TraceEventType.Warning);
return(new HttpStatusCodeResult(404));
}
DomainContext domainContext = _domainPool.GetDomainContext(Guid.Parse(domainId));
if (domainContext == null)
{
_log.Write("微信网页授权接口发起回调", "指定的 domainId 不存在", TraceEventType.Warning);
return(new HttpStatusCodeResult(404));
}
if (domainContext.Authorizer == null)
{
//重定向到错误页面
return(new RedirectResult(String.Format(
"~/Home/ErrorView/{0}?message={1}", domainContext.Domain.Id, "td5")));
}
//只有微信认证服务号具备此权限
//用户管理-网页授权获取用户openid/用户基本信息
if (domainContext.Authorizer.AuthorizationType != EnumAuthorizationType.AuthorizedService)
{
//重定向到错误页面
return(new RedirectResult(String.Format(
"~/Home/ErrorView/{0}?message={1}", domainContext.Domain.Id, "td4")));
}
if (String.IsNullOrEmpty(code))
{
//重定向到错误页面
return(new RedirectResult(String.Format(
"~/Home/ErrorView/{0}?message={1}", domainContext.Domain.Id, "td1")));
}
/*
* 此处偶发 40029 错误，不合法的oauth_code
* 40029-invalid code, hints: [ req_id: Ft6quA0644ns67 ]
* https://segmentfault.com/q/1010000002739502?foxhandler=RssReadRenderProcessHandler
* http://mp.weixin.qq.com/qa/11/3c20059cc944d6edf4a1124c2fd09253.html
* redirect_uri后面加个随机数没用
* 通过尝试发起两次请求的方式解决
*/
//通过code换取网页access_token
RequestApiResult <WeixinWebAccessTokenResult> getWebAccessToken =
TokenApi.GetThirdPartyWebAccessToken(domainContext.AppId, code, _configuration.ThirdParty.AppId,
ThirdPartyAccessTokenGetter.Get());
if (getWebAccessToken.Success == false)
{
//再来一次，防止死循环，只重试一次，在URL后面加个参数以标记
if (redirectUrl.Contains("RetryGetWebAccessToken"))
{
_log.Write("请求网页AccessToken失败。", getWebAccessToken.Message, TraceEventType.Warning);
//重定向到错误页面
return(new RedirectResult(String.Format(
"~/Home/ErrorView/{0}?message={1}", domainContext.Domain.Id, "td2")));
}
else
{
if (redirectUrl.IndexOf('?') >= 0)
{
redirectUrl += "&RetryGetWebAccessToken=1";
}
else
{
redirectUrl += "?RetryGetWebAccessToken=1";
}
return(new RedirectResult(redirectUrl));
}
}
//将OpenId保存到Session
SessionContainer.SetOpenId(HttpContext, getWebAccessToken.ApiResult.OpenId);
//先判断本地数据库中是否已经有了此用户信息
MemberContext memberContext = null;
MemberEntity member = _memberManager.GetMemberByOpenId(domainContext.Domain.Id, domainContext.AppId, getWebAccessToken.ApiResult.OpenId);
if (member != null)
{
if (member.Attention)
{
//为提高鉴权性能，此处不更新用户信息，只作标记，用windows服务后台更新
_memberManager.NeedUpdate(member.Id, true);
memberContext = new MemberContext(member);
SessionContainer.SetMemberContext(HttpContext, memberContext);
//转回初始业务页面
return(new RedirectResult(redirectUrl));
}
else
{
//如果用户已经取消关注，此处就不需要再调用微信的 GetUserInfo 接口了
//直接判断能不能匿名浏览即可
return(RedirectUrlOnlyOpenId(redirectUrl, domainId));
}
}
//在本地没有用户信息的情况下，调用weixinApi去取
//此处拿到OpenId了，接下来判断该用户是否是已关注用户
RequestApiResult <WeixinUser> getUserInfoResult =
UserApiWrapper.GetUserInfo(domainContext, getWebAccessToken.ApiResult.OpenId);
if (getUserInfoResult.Success == false)
{
//重定向到错误页面
return(new RedirectResult(String.Format(
"~/Home/ErrorView/{0}?message={1}", domainContext.Domain.Id, "td3")));
}
//值为0时，代表此用户没有关注该公众号，拉取不到其余信息。
//跳转到引导关注页面
if (getUserInfoResult.ApiResult.Subscribe == 0)
{
//用户取消关注有消息推送
//在那时设置member中是否在关注为false
return(RedirectUrlOnlyOpenId(redirectUrl, domainId));
}
else
{
//根据OpenId获取用户信息
//添加新用户
AddMemberArgs args = new AddMemberArgs();
args.WeixinUser = getUserInfoResult.ApiResult;
member = _memberManager.AddMember(domainContext, args);
memberContext = new MemberContext(member);
SessionContainer.SetMemberContext(HttpContext, memberContext);
//转回初始业务页面
return(new RedirectResult(redirectUrl));
}
}