/**
*
* 通过code换取网页授权access_token和openid的返回数据，正确时返回的JSON数据包如下：
* {
* "access_token":"ACCESS_TOKEN",
* "expires_in":7200,
* "refresh_token":"REFRESH_TOKEN",
* "openid":"OPENID",
* "scope":"SCOPE",
* "unionid": "o6_bmasdasdsad6_2sgVt7hMZOPfL"
* }
* 其中access_token可用于获取共享收货地址
* openid是微信支付jsapi支付接口统一下单时必须的参数
* 更详细的说明请参考网页授权获取用户基本信息：http://mp.weixin.qq.com/wiki/17/c0f37d5704f0b64713d5d2c37b468d75.html
* @失败时抛异常WxPayException
*/
public void GetOpenidAndAccessTokenFromCode(string code)
{
try
{
//构造获取openid及access_token的url
WxPayData data = new WxPayData();
data.SetValue("appid", jsApiConfig.AppId);
data.SetValue("secret", jsApiConfig.AppSecret);
data.SetValue("code", code);
data.SetValue("grant_type", "authorization_code");
string url = "https://api.weixin.qq.com/sns/oauth2/access_token?" + data.ToUrl();
//请求url以获取数据
string result = HttpService.Get(url);
OwinTokenDto model = SerializationHelper.JsonToObject <OwinTokenDto>(result);
//保存access_token，用于收货地址获取
access_token = model.Access_Token;
//获取用户openid
openid = model.OpenId;
}
catch (Exception ex)
{
throw new WxPayException(ex.ToString());
}
}
/**
*
* 获取收货地址js函数入口参数,详情请参考收货地址共享接口：http://pay.weixin.qq.com/wiki/doc/api/jsapi.php?chapter=7_9
* @return string 共享收货地址js函数需要的参数，json格式可以直接做参数使用
*/
public string GetEditAddressParameters()
{
string parameter = "";
try
{
string host = HttpContext.Current.Request.Url.Host;
string path = HttpContext.Current.Request.Path;
string queryString = HttpContext.Current.Request.Url.Query;
//这个地方要注意，参与签名的是网页授权获取用户信息时微信后台回传的完整url
string url = "http://" + host + path + queryString;
//构造需要用SHA1算法加密的数据
WxPayData signData = new WxPayData();
signData.SetValue("appid", jsApiConfig.AppId);
signData.SetValue("url", url);
signData.SetValue("timestamp", WxPayApi.GenerateTimeStamp());
signData.SetValue("noncestr", WxPayApi.GenerateNonceStr());
signData.SetValue("accesstoken", access_token);
string param = signData.ToUrl();
//SHA1加密
string addrSign = FormsAuthentication.HashPasswordForStoringInConfigFile(param, "SHA1");
//获取收货地址js函数入口参数
WxPayData afterData = new WxPayData();
afterData.SetValue("appId", jsApiConfig.AppId);
afterData.SetValue("scope", "jsapi_address");
afterData.SetValue("signType", "sha1");
afterData.SetValue("addrSign", addrSign);
afterData.SetValue("timeStamp", signData.GetValue("timestamp"));
afterData.SetValue("nonceStr", signData.GetValue("noncestr"));
//转为json格式
parameter = afterData.ToJson();
}
catch (Exception ex)
{
throw new WxPayException(ex.ToString());
}
return(parameter);
}
/**
*
* 网页授权获取用户基本信息的全部过程
* 详情请参看网页授权获取用户基本信息：http://mp.weixin.qq.com/wiki/17/c0f37d5704f0b64713d5d2c37b468d75.html
* 第一步：利用url跳转获取code
* 第二步：利用code去获取openid和access_token
*
*/
public void GetOpenidAndAccessToken()
{
if (!string.IsNullOrEmpty(HttpContext.Current.Request.QueryString["code"]))
{
//获取code码，以获取openid和access_token
string code = HttpContext.Current.Request.QueryString["code"];
GetOpenidAndAccessTokenFromCode(code);
}
else
{
//构造网页授权获取code的URL
string scheme = HttpContext.Current.Request.Url.Scheme;
string host = HttpContext.Current.Request.Url.Host;
string path = HttpContext.Current.Request.Path;
string redirect_uri = HttpUtility.UrlEncode(scheme + "://" + host + path);
WxPayData data = new WxPayData();
data.SetValue("appid", jsApiConfig.AppId);
data.SetValue("redirect_uri", redirect_uri);
data.SetValue("response_type", "code");
data.SetValue("scope", "snsapi_base");
data.SetValue("state", "STATE" + "#wechat_redirect");
string url = "https://open.weixin.qq.com/connect/oauth2/authorize?" + data.ToUrl();
try
{
//触发微信返回code码
HttpContext.Current.Response.Redirect(url);//Redirect函数会抛出ThreadAbortException异常，不用处理这个异常
}
catch (System.Threading.ThreadAbortException ex)
{
}
}
}
