public ProcessingResult Process(RequestContext context)
{
// URL format : ~/login
Regex r = new Regex(@"^/login$", RegexOptions.IgnoreCase);
Match m = r.Match(context.Request.Uri.AbsolutePath.ToLowerInvariant());
if (!m.Success) return ProcessingResult.Continue;
IRequest request = context.Request;
IResponse response = context.Response;
var assembly = Assembly.GetExecutingAssembly();
var resourceName = Assembly.GetExecutingAssembly().GetName().Name + @".html.cameras.html";
string html;
using (Stream stream = assembly.GetManifestResourceStream(resourceName))
using (StreamReader reader = new StreamReader(stream))
{
html = reader.ReadToEnd();
}
response.ContentType = new ContentTypeHeader("txt/html");
response.ContentLength.Value = html.Length;
response.Add(new DateHeader("Last-Modified", DateTime.Now.ToUniversalTime()));
var generator = HttpFactory.Current.Get<ResponseWriter>();
generator.SendHeaders(context.HttpContext, response);
generator.SendBody(context.HttpContext, new MemoryStream(Encoding.Default.GetBytes(html)));
return ProcessingResult.Abort;
}
public ProcessingResult Process(RequestContext context)
{
// URL format : ~/camera/{id}
Regex r = new Regex(@"^/camera/(\w+)$", RegexOptions.IgnoreCase);
Match m = r.Match(context.Request.Uri.AbsolutePath.ToLowerInvariant());
if (!m.Success) return ProcessingResult.Continue;
string cameraId = m.Groups[1].ToString().ToLowerInvariant();
Camera camera = Locator.Get<ICameraManager>().GetCamera(cameraId);
string json = JsonConvert.SerializeObject(camera);
IRequest request = context.Request;
IResponse response = context.Response;
response.ContentType = new ContentTypeHeader("application/json");
response.ContentLength.Value = json.Length;
response.Add(new DateHeader("Last-Modified", DateTime.Now.ToUniversalTime()));
var generator = HttpFactory.Current.Get<ResponseWriter>();
generator.SendHeaders(context.HttpContext, response);
generator.SendBody(context.HttpContext, new MemoryStream(Encoding.Default.GetBytes(json)));
return ProcessingResult.Abort;
}
public ProcessingResult Process(RequestContext context)
{
// URL format : ~/camera/{id}/thumbnail
Regex r = new Regex(@"^/camera/(\w+)/thumbnail$", RegexOptions.IgnoreCase);
Match m = r.Match(context.Request.Uri.AbsolutePath.ToLowerInvariant());
if (!m.Success) return ProcessingResult.Continue;
string cameraId = m.Groups[1].ToString().ToLowerInvariant();
byte[] thumbnail = Locator.Get<ICameraManager>().GetCameraThumbnail(cameraId);
IRequest request = context.Request;
IResponse response = context.Response;
response.ContentType = new ContentTypeHeader("image/bmp");
response.ContentLength.Value = thumbnail.Length;
response.Add(new DateHeader("Last-Modified", DateTime.Now.ToUniversalTime()));
var generator = HttpFactory.Current.Get<ResponseWriter>();
generator.SendHeaders(context.HttpContext, response);
generator.SendBody(context.HttpContext, new MemoryStream(thumbnail));
return ProcessingResult.Abort;
}
/// <summary>
/// 由模块处理请求消息
/// </summary>
/// <param name="context"></param>
/// <returns></returns>
private ProcessingResult ProcessModules(RequestContext context)
{
foreach (IModule module in _modules)
{
ProcessingResult result = module.Process(context);
if (result != ProcessingResult.Continue)
{
Logger.Debug(module.GetType().Name + ": " + result);
return result;
}
}
return ProcessingResult.Continue;
}
/// <summary>
/// 由路由器处理请求消息
/// </summary>
/// <param name="context">Request context.</param>
/// <returns>Processing result.</returns>
private ProcessingResult ProcessRouters(RequestContext context)
{
foreach (IRouter router in _routers)
{
if (router.Process(context) != ProcessingResult.SendResponse)
continue;
Logger.Debug(router.GetType().Name + " sends the response.");
return ProcessingResult.SendResponse;
}
return ProcessingResult.Continue;
}
/// <summary>
/// 在请求消息已到达，准备处理之前的准备工作
/// </summary>
/// <param name="context">The context.</param>
/// <remarks>
/// Default implementation adds a <c>Date</c> header and <c>Server</c> header.
/// </remarks>
protected virtual void OnBeforeProcessRequest(RequestContext context)
{
if (context.Request.ContentLength.Value > MaxContentSize)
throw new HttpException(HttpStatusCode.RequestEntityTooLarge, "Too large body, limit is " + MaxContentSize);
context.Response.Add(new DateHeader("Date", DateTime.UtcNow));
context.Response.Add(new StringHeader("Server", ServerName));
}
/// <summary>
/// 查看消息头鉴权内容
/// </summary>
/// <param name="context">The context.</param>
/// <remarks>
/// Looks after a <see cref="AuthorizationHeader"/> in the request and will
/// use the <see cref="AuthenticationProvider"/> if found.
/// </remarks>
protected virtual void AuthenticateRequest(RequestContext context)
{
var authHeader = (AuthorizationHeader)context.Request.Headers[AuthorizationHeader.AuthorizationName];
if (authHeader != null)
{
AuthenticationProvider.Authenticate(context.Request);
}
}
/// <summary>
/// 处理Http请求
/// </summary>
/// <param name="e"></param>
/// <returns></returns>
private ProcessingResult HandleRequest(RequestEventArgs e)
{
var context = new RequestContext
{
HttpContext = e.Context,
Request = e.Request,
Response = e.Response
};
// 鉴权
AuthenticateRequest(context);
// 前期处理
OnBeforeProcessRequest(context);
// 通知外部请求到达
BeforeProcessRequest(this, e);
// 解析消息体
if (e.Request.ContentLength.Value > 0)
{
DecodeBody(e.Request);
}
ProcessingResult result = ProcessingResult.Continue;
// 由路由器处理消息
result = ProcessRouters(context);
if (ProcessResult(result, e))
{
Logger.Debug("Routers processed the request.");
}
// 有模块处理消息
result = ProcessModules(context);
if (ProcessResult(result, e))
{
return result;
}
// 通知请求已收到，由外部模块处理请求
RequestReceived(this, e);
return ProcessingResult.Continue;
}
