使用asp.net mvc3的Filter模拟实现http basic Authentication
近段时间,在编写一个淘宝家园的手机客户端,需要一个配套的api提供服务，使用http basic验证来确认用户。在iis7上架了一个api的测试站点，iis默认的http basic 验证需要和windows的用户绑定在一起，无法将用户认证和业务数据中的用户进行对应关联。查询相关资料后，准备使用mvc的filter模拟实现http basic authentication,也方便在实现api时对验证和非验证的调整。
1.vs2010中建立asp.net mvc3 web项目
2.添加用户验证filter，重载OnAuthorization(AuthorizationContext filterContext)函数，实现basic验证
public class HttpBasicFilter:AuthorizeAttribute
{
public override void OnAuthorization(AuthorizationContext filterContext) {if(validateUser(filterContext)){
return;
}//设置http header信息
SendAuthenticationHeader();
filterContext.HttpContext.Response.Write(unAuthMessage);
//中指处理,直接返回
filterContext.Result = new EmptyResult();
}private Boolean validateUser(AuthorizationContext filterContext)
{
try
{
string authHeader = filterContext.HttpContext.Request.Headers["Authorization"];
if (authHeader != null && authHeader.StartsWith("Basic")) {
string[] auths = ExtractCredentials(authHeader);
string uname = auths[0];
string upwd = auths[1];//密码校验
weibo_unitaoEntities1 db = new weibo_unitaoEntities1();
if (db.Userinfo.Where(c => c.uname == uname && c.upwd == upwd && c.ustatus == 0).Count() == 1)
{
filterContext.Controller.ViewData.Add("username", uname);
return true;
}
}
}
catch (Exception ex) {
//do something...
}
return false;}//获取用户名和密码
private string[] ExtractCredentials(string authHeader)
{
//剔除 "basic"
string encodedUserPass = authHeader.Substring(6).Trim();//字符编码
string userPass = System.Text.Encoding.Default.GetString(Convert.FromBase64String(encodedUserPass));
int separator = userPass.IndexOf(':');string[] credentials = new string[2];
credentials[0] = userPass.Substring(0, separator);
credentials[1] = userPass.Substring(separator + 1);return credentials;
}//设置401错误
private void SendAuthenticationHeader()
{
HttpContext context = HttpContext.Current;context.Response.StatusCode = 401;
context.Response.AddHeader(
"WWW-Authenticate",
String.Format("Basic realm=\"{0}\"", "unitao"));
}//错误页面信息
private string unAuthMessage="<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\" \"http://www.w3.org/TR/1999/REC-html401-19991224/loose.dtd\">"
+"<html>"
+"<head>"
+"<title>Error</title>"
+"<meta http-equiv=\"Content-Type\" content=\"text/html; charset=UTF-8\"/>"
+"</head>"
+"<body><h1>401 Unauthorized.</h1></body>"
+"</html>";
}
3.在需要basic Aathentication为controller添加filter，也可以针对某个action加上filter
4.发布后需要开启站点的匿名登录模式（或者在webconfig中配置）
