Web缓存代理服务器 [英] Web Caching proxy server

问题描述

我想在代理服务器中开发一个应用程序，该应用程序能够缓存网页，以后我会用它来缓存浏览更多次的网页.

所以我想要一个C#的代码.如果有人可以帮助我的话.

或执行此操作的首选步骤(算法)是什么?

最好的问候...

解决方案

这里是一个起点，此链接包含一些代理服务器代码.

http://code.cheesydesign.com/?p=393 [ 受保护的 静态 字符串 UrlToFilename(字符串 url){ // 对于jpegs和height字段，在?之后的位为?似乎因机器而异 字符串 filename = url; // 截断文件名，如果文件名太长则添加一个哈希值 如果(文件名.长度> 160 ){ MD5哈希= MD5.Create(); 字节 [] hexResult = hash.ComputeHash(Encoding.Unicode.GetBytes(url)); 文件名=文件名.Substring( 0 ， 160 )+ BitConverter.ToString(hexResult).Replace(" ，" ); } int 索引； while ((index = filename.IndexOfAny(System.IO.Path.GetInvalidFileNameChars()))！= -1){ filename = filename.Replace(filename [index]，' _'); } 返回文件名； }

然后，您可以从此处将文件存储在您选择的目录结构中，并在代理服务器中检查文件是否存在，如果有，请使用文件，否则从互联网上获取.

I want to develop an application in the proxy server, which is capable of caching the web pages, which i would use later to cache pages which i would have browsed more times.

So i want a code in C# for that. if anybody could help me for that.

OR what are the preferred steps (algorithms) to do that?

Best regards...

解决方案

Here''s a starting point, this link has some proxy server code.

http://code.cheesydesign.com/?p=393[^]

Then what you need is an algorithm to change the URL to a filename, which you can store in your cache. So some code like this:

protected static string UrlToFilename(string url) {
  // With jpegs and height fields the bits after the ? seem to vary from machine to machine

  string filename = url;

  // Truncate the filename and add a hash if it is too long
  if (filename.Length > 160) {
    MD5 hash = MD5.Create();
    byte[] hexResult = hash.ComputeHash(Encoding.Unicode.GetBytes(url));
    filename = filename.Substring(0, 160) + BitConverter.ToString(hexResult).Replace("-", "");
  }

  int index;
  while ((index = filename.IndexOfAny(System.IO.Path.GetInvalidFileNameChars())) != -1) {
    filename = filename.Replace(filename[index], '_');
  }
  return filename;
}

Then from here you can store the files in a directory structure of your choosing, and in the proxy server, check if the file exists, if so use the file, else fetch from the internet.

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