在实际的项目中，会存在大量的自定义路由，URL很容易被错误的路由捕获，现在我们就实现一个这样的诊断工具，该工具通过实现一个自定义的IHttpModule来实现。
首先，我们创建CustomRouteHandler：
public
class
CustomRouteHandler : IRouteHandler
{
public
IHttpHandler GetHttpHandler(RequestContext requestContext)
{
if
(HasQueryStringKey(
"routeInfo"
, requestContext.HttpContext.Request))
{
OutputRouteDiagnostics(requestContext.RouteData, requestContext.HttpContext);
}
var
handler =
new
CustomMvcHandler(requestContext);
return
handler;
}
private
bool
HasQueryStringKey(
string
keyToTest, HttpRequestBase request)
{
return
Regex.IsMatch(request.Url.Query,
string
.Format(
@"^\?{0}$"
, keyToTest));
}
private
void
OutputRouteDiagnostics(RouteData routeData, HttpContextBase context)
{
var
response = context.Response;
response.Write(
@"<style>body {font-family: Arial;}
table th {background-color: #359; color: #fff;}
</style>
<h1>Route Data:</h1>
<table border='1' cellspacing='0' cellpadding='3'>
<tr><th>Key</th><th>Value</th></tr>"
);
foreach
(
var
pair
in
routeData.Values)
{
response.Write(
string
.Format(
"<tr><td>{0}</td><td>{1}</td></tr>"
, pair.Key, pair.Value));
}
response.Write(
@"</table>
<h1>Routes:</h1>
<table border='1' cellspacing='0' cellpadding='3'>
<tr><th></th><th>Route</th></tr>"
);
bool
foundRouteUsed =
false
;
foreach
(Route r
in
RouteTable.Routes)
{
response.Write(
"<tr><td>"
);
bool
matches = r.GetRouteData(context) !=
null
;
string
backgroundColor = matches ?
"#bfb"
:
"#fbb"
;
if
(matches && !foundRouteUsed)
{
response.Write(
"»"
);
foundRouteUsed =
true
;
}
response.Write(
string
.Format(
"</td><td style='font-family: Courier New; background-color:{0}'>{1}</td></tr>"
,
backgroundColor, r.Url));
}
response.End();
}
}
|
CustomRouteHandler中使用到了一个CustomMvcHandler，如下：
public
class
CustomMvcHandler : MvcHandler
{
public
CustomMvcHandler(RequestContext requestContext)
:
base
(requestContext)
{
}
protected
override
void
ProcessRequest(HttpContext httpContext)
{
try
{
base
.ProcessRequest(httpContext);
}
catch
(Exception exc)
{
throw
new
ApplicationException(
"RouteUsed:"
+
RequestContext.RouteData.Route.GetVirtualPath(
RequestContext, RequestContext.RouteData.Values), exc);
}
}
}
|
其次，我们需要在MapRoute的时候指定CustomRouteHandler，如下：
routes.MapRoute(
"Default"
,
// Route name
"Home/{action}/{id}"
,
// URL with parameters
new
{ controller =
"Home"
, action =
"Index"
, id = UrlParameter.Optional }
// Parameter defaults
).RouteHandler =
new
CustomRouteHandler();
|
最终的结果，如果我们想要看当前URL的路由信息，则输入URL如：http://localhost:12205/Home?routeInfo，会显式如下：
本文转自最课程陆敏技博客园博客，原文链接：http://www.cnblogs.com/luminji/archive/2011/09/07/2169674.html，如需转载请自行联系原作者
