/// <summary>
/// 返回XML格式的响应消息
/// </summary>
/// <param name="encryptType">消息加密类型</param>
/// <returns>返回XML格式的响应消息</returns>
public string ToXml(MessageEncryptTypeEnum encryptType)
{
int WXBizMsgCrypt_OK = 0;
//得到未加密的XML响应消息
string xml = ToXml();
//如果需要加密，加密消息
if (encryptType == MessageEncryptTypeEnum.aes)
{
int timeStamp = Utility.ToWeixinTime(CreateTime);
Random random = new Random();
string nonce = random.Next().ToString();
AccountInfo account = AccountInfoCollection.GetAccountInfo(FromUserName);
if (account != null)
{
Tencent.WXBizMsgCrypt wxcpt = new Tencent.WXBizMsgCrypt(account.Token, account.EncodingAESKey, account.AppId);
string xmlEncrypt = "";
//加密消息
if (wxcpt.EncryptMsg(xml, timeStamp.ToString(), nonce, ref xmlEncrypt) == WXBizMsgCrypt_OK)
{
return(xmlEncrypt);
}
}
}
return(xml);
}
/// <summary>
/// 获取用户网页授权的地址
/// </summary>
/// <param name="userName">公众号</param>
/// <param name="redirectUrl">用户授权之后的回调地址</param>
/// <param name="scope">应用授权作用域</param>
/// <param name="state">重定向之后的state参数</param>
/// <returns>返回用户网页授权的地址；如果获取公众号信息失败或者参数错误，返回空字符串。</returns>
public static string GetOAuthUrl(string userName, string redirectUrl, OAuthScopeEnum scope, string state = null)
{
string url = string.Empty;
AccountInfo account = AccountInfoCollection.GetAccountInfo(userName);
if (account == null)
{
return(url);
}
if (string.IsNullOrWhiteSpace(redirectUrl))
{
return(url);
}
if (state == null)
{
state = string.Empty;
}
if (state.Length > maxStateLength)
{
return(url);
}
foreach (char c in state)
{
if (!char.IsLetterOrDigit(c))
{
return(url);
}
}
url = string.Format(urlForGettingOAuthUrl, account.AppId, HttpUtility.UrlEncode(redirectUrl), scope.ToString("g"), state);
return(url);
}
/// <summary>
/// 解密消息
/// </summary>
/// <returns>返回解密之后的消息</returns>
public string DecryptMessage(string content)
{
string msg = "";
XmlDocument doc = new XmlDocument();
doc.LoadXml(content);
XmlNode root = doc.FirstChild;
string userName = root["ToUserName"].InnerText;
AccountInfo account = AccountInfoCollection.GetAccountInfo(userName);
if (account == null)
{
return(msg);
}
Tencent.WXBizMsgCrypt wxcpt = new Tencent.WXBizMsgCrypt(account.Token, account.EncodingAESKey, account.AppId);
string msg_signature = RequestEx.TryGetQueryString("msg_signature", "", request);
string timestamp = RequestEx.TryGetQueryString("timestamp", "", request);
string nonce = RequestEx.TryGetQueryString("nonce", "", request);
wxcpt.DecryptMsg(msg_signature, timestamp, nonce, content, ref msg);
return(msg);
}
/// <summary>
/// 从微信服务器获取access token
/// </summary>
/// <param name="userName">公众号</param>
/// <param name="msg">从服务器返回的错误信息。</param>
/// <returns>返回许可令牌；如果获取失败，返回null。</returns>
private static AccessToken GetFromWeixinServer(string userName, out ErrorMessage msg)
{
AccessToken token = null;
msg = new ErrorMessage(ErrorMessage.ExceptionCode, "");
AccountInfo account = AccountInfoCollection.GetAccountInfo(userName);
if (account == null)
{
msg.errmsg = "获取公众号参数失败。";
return(token);
}
string url = string.Format(urlForGettingAccessToken, account.AppId, account.AppSecret);
string result;
if (!HttpHelper.Request(url, out result, httpMethodForGettingAccessToken, string.Empty))
{
msg.errmsg = "从微信服务器获取响应失败。";
return(token);
}
if (ErrorMessage.IsErrorMessage(result))
{
msg = ErrorMessage.Parse(result);
}
else
{
try
{
token = AccessToken.ParseFromJson(result);
}
catch (Exception e)
{
msg = new ErrorMessage(e);
}
}
return(token);
}
/// <summary>
/// 刷新access token
/// </summary>
/// <param name="userName">公众号</param>
/// <param name="refreshToken">用户刷新token</param>
/// <param name="errorMessage">返回获取是否成功</param>
/// <returns>返回access token；如果获取失败，返回null。</returns>
public static OAuthAccessToken Refresh(string userName, string refreshToken, out ErrorMessage errorMessage)
{
OAuthAccessToken token = null;
if (string.IsNullOrWhiteSpace(refreshToken))
{
errorMessage = new ErrorMessage(ErrorMessage.ExceptionCode, "用户刷新token不能为空。");
return(token);
}
AccountInfo account = AccountInfoCollection.GetAccountInfo(userName);
if (account == null)
{
errorMessage = new ErrorMessage(ErrorMessage.ExceptionCode, "获取公众号信息失败。");
return(token);
}
string url = string.Format(urlForRefreshingAccessToken, account.AppId, refreshToken);
string responseContent;
if (!HttpHelper.Request(url, out responseContent, httpMethod, (string)null))
{
errorMessage = new ErrorMessage(ErrorMessage.ExceptionCode, "从微信服务器获取响应失败。");
}
else if (ErrorMessage.IsErrorMessage(responseContent))
{
errorMessage = ErrorMessage.Parse(responseContent);
}
else
{
var result = JsonConvert.DeserializeAnonymousType(responseContent,
new { access_token = "", expires_in = 0, refresh_token = "", openid = "", scope = "" });
token = new OAuthAccessToken(result.access_token, result.expires_in, result.refresh_token, result.openid, result.scope);
errorMessage = new ErrorMessage(ErrorMessage.SuccessCode, "获取access token成功。");
}
return(token);
}