public virtual ICacheStorage CreateStorage(WebPageContext context)
{
var value = context.GetConfigValue <string>("Page", "CacheStorage", string.Empty).ToLower();
if (!string.IsNullOrEmpty(value))
{
return(CacheStorageFactory.Create(value)); //通过存储器名称获取
}
//通过后缀名获取
ICacheStorage storage = null;
if (_storages.TryGetValue(context.PathExtension, out storage))
{
return(storage);
}
return(StorageEmpty.Instance);
}
public void Send(WebPageContext context, object result)
{
DTObject dto = result as DTObject;
if (dto != null)
{
context.Response.Write(dto.GetCode(false, false));
return;
}
var code = result as string;
if (code != null)
{
context.Response.Write(code);
return;
}
throw new DTOSenderException("DTOSender对象仅能发送 DTObject 或者 string 类型的对象！当前被发送的对象类型为：" + result.GetType().FullName);
}
/// <summary>
/// 压缩流
/// </summary>
/// <param name="source">需要压缩的流</param>
/// <param name="target">需要写入压缩内容的目标流</param>
public void Compress(WebPageContext context, Stream source, Stream target)
{
var compressionType = context.CompressionType;
int bufferSize = 8000;
Stream compressStream = null;
try
{
if (compressionType == HttpCompressionType.GZip)
{
compressStream = new GZipStream(target, CompressionMode.Compress, true);
}
else if (compressionType == HttpCompressionType.Deflate)
{
compressStream = new DeflateStream(target, CompressionMode.Compress, true);
}
else
{
compressStream = target;
}
byte[] buffer = new byte[bufferSize];
int retval = source.ReadPro(buffer, 0, bufferSize);
while (retval == bufferSize)
{
compressStream.Write(buffer, 0, bufferSize);
compressStream.Flush();
retval = source.ReadPro(buffer, 0, bufferSize);
}
// 写入剩余的字节。
compressStream.Write(buffer, 0, retval);
compressStream.Close();//一定要close才有效，否则gzip的字节数出错
}
catch (Exception ex)
{
if (compressStream != null)
{
compressStream.Close();
}
throw ex;
}
}
public static IServerCache Create(WebPageContext context)
{
IServerCache serverCache = null;
var config = WebPagesConfiguration.Global.PageConfig;
if (config == null || config.ServerCacheFactory == null)
{
serverCache = InjectionServerCacheFactory.Instance.Create(context);
}
else
{
IServerCacheFactory factory = config.ServerCacheFactory.GetInstance <IServerCacheFactory>();
serverCache = factory.Create(context);
if (serverCache == null)
{
serverCache = NonServerCache.Instance; //配置文件没有设置的就由系统自动设置
}
}
return(serverCache);
}
public virtual object[] ParseArguments(WebPageContext context)
{
HttpRequest request = context.Request;
string code = null;
using (StreamReader reader = new StreamReader(request.InputStream))
{
code = reader.ReadToEnd();
}
if (IsJSON(code))
{
return new object[] { DTObject.Create(code) }
}
;
else
{
return(FormExtractor.Instance.ParseArguments(context));
}
}
private static void ProcessGET(WebPageContext context, Exception ex, int statusCode)
{
context.Response.StatusCode = statusCode;
var msg = ex.GetCompleteInfo();
if (context.IsErrorPage)
{
//如果错误页本身发生错误
context.Response.Write(msg);
}
else
{
#if (DEBUG)
context.Response.Write(msg);
#endif
#if (!DEBUG)
context.Redirect(string.Format("/error.htm?error={0}", HttpUtility.UrlEncode(msg)));
#endif
}
}
public static ICompressor Create(WebPageContext context)
{
ICompressor cpor = null;
var config = WebPagesConfiguration.Global.PageConfig;
if (config == null || config.CompressorFactory == null)
{
//没有配置文件设置，那么查看程序集级别的注入
cpor = InjectionCompressorFactory.Instance.Create(context);
}
else
{
var factory = config.CompressorFactory.GetInstance <ICompressorFactory>();
cpor = factory.Create(context);
if (cpor == null)
{
cpor = InjectionCompressorFactory.Instance.Create(context); //配置文件没有设置的就由系统自动设置
}
}
return(cpor);
}
public static IClientCache Create(WebPageContext context)
{
IClientCache clientCache = null;
var config = WebPagesConfiguration.Global.PageConfig;
if (config == null || config.ClientCacheFactory == null)
{
//没有配置文件设置，那么查看程序集级别的注入
clientCache = InjectionClientCacheFactory.Instance.Create(context);
}
else
{
IClientCacheFactory factory = config.ClientCacheFactory.GetInstance <IClientCacheFactory>();
clientCache = factory.Create(context);
if (clientCache == null)
{
clientCache = InjectionClientCacheFactory.Instance.Create(context); //配置文件没有设置的就由系统自动设置
}
}
return(clientCache);
}
private static WebPage CreatePage(WebPageContext context)
{
IWebPageLocator locator = WebPageLocatorFactory.CreateLocator(context.PathExtension);
IHttpHandler handler = locator.GetHandler(context.VirtualPath);//利用资源定位器得到资源的Handler类型
if (handler == null)
{
if (!context.IsValidPath())
{
//如果既没有后台文件，也没有前台文件，那么资源不存在
throw new HttpException(404, string.Format(Strings.RequestResourceNotExist, context.VirtualPath));
}
handler = locator.GetDefaultHandler(); //如果有前台文件那么用默认的处理
}
WebPage page = handler as WebPage;
if (page == null)
{
throw new TypeMismatchException(handler.GetType(), typeof(WebPage));
}
return(page);
}
private static HttpCompressionType GetCompressionMode(WebPageContext context)
{
var request = context.Request;
string acceptEncoding = request.Headers["Accept-Encoding"];
if (string.IsNullOrEmpty(acceptEncoding))
{
return(HttpCompressionType.None);
}
acceptEncoding = acceptEncoding.ToUpperInvariant();
if (acceptEncoding.Contains("GZIP"))
{
return(HttpCompressionType.GZip);
}
else if (acceptEncoding.Contains("DEFLATE"))
{
return(HttpCompressionType.Deflate);
}
else
{
return(HttpCompressionType.None);
}
}
public ICompressor Create(WebPageContext context)
{
var value = context.GetConfigValue <string>("Page", "compressor", string.Empty).ToLower();
if (!string.IsNullOrEmpty(value))
{
switch (value)
{
case "gzip": return(HttpCompressor.Instance);
default: return(NonCompressor.Instance);
}
}
//如果没有页面级配置，那么根据扩展名查看配置
ICompressor compressor = null;
if (_compressors.TryGetValue(context.PathExtension, out compressor))
{
return(compressor);
}
return(NonCompressor.Instance);
}
public void SetEncoding(WebPageContext context)
{
}
public bool IsAccepted(WebPageContext context)
{
return(false);
}
public IHttpHandler CreateHandler(WebPageContext context)
{
return(CreateFromVirtualPath(context, context.VirtualPath));
}
/// <summary>
/// 判断浏览器是否支持压缩模式
/// </summary>
/// <param name="context"></param>
/// <returns></returns>
public bool IsAccepted(WebPageContext context)
{
return(context.CompressionType != HttpCompressionType.None);
}
public void Write(WebPageContext context, Stream content)
{
WriteContent(context, content);
UpdateCache(context, content);
}
public abstract bool IsExpired(WebPageContext context, ICacheStorage storage);
private int GetCacheMinutes(WebPageContext context)
{
return(context.GetConfigValue <int>("Page", "delay", 0));
}
internal ResolveRequestCache(WebPageContext context)
{
_context = context;
}
public abstract void SetCache(WebPageContext context);
public abstract bool IsExpired(WebPageContext context);
/// <summary> /// 向缓存区中写入信息 /// </summary> /// <param name="content"></param> public abstract void Write(WebPageContext context, Stream content, ICacheStorage storage);
/// <summary> /// 读取缓存区中的流信息 /// </summary> /// <returns></returns> public abstract Stream Read(WebPageContext context, ICacheStorage storage);
public void Compress(WebPageContext context, Stream source, Stream target)
{
}
/// <summary>
/// 读取缓存区中的流信息
/// </summary>
/// <returns></returns>
public override Stream Read(WebPageContext context, ICacheStorage storage)
{
var variable = new CacheVariable(GetUrl(context), context.CompressionType, context.Device);
return(storage.Read(variable));
}
public override void SetCache(WebPageContext context)
{
SetClientCache(context.Response, 525600);
}
protected bool TryGetCacheTime(WebPageContext context, out DateTime cacheTime, ICacheStorage storage)
{
var variable = new CacheVariable(GetUrl(context), context.CompressionType, context.Device);
return(storage.TryGetLastModified(variable, out cacheTime));
}
protected virtual string GetUrl(WebPageContext context)
{
return(context.Request.Url.AbsoluteUri);
}
/// <summary>
/// 向缓存区中写入信息
/// </summary>
/// <param name="content"></param>
public override void Write(WebPageContext context, Stream content, ICacheStorage storage)
{
var variable = new CacheVariable(GetUrl(context), context.CompressionType, context.Device);
storage.Update(variable, content);
}
/// <summary>
/// 检查缓存是否过期
/// </summary>
/// <param name="context"></param>
/// <returns>true:缓存已过期;false:缓存未过期</returns>
public override bool IsExpired(WebPageContext context, ICacheStorage storage)
{
return(false);
}