7zip的压缩网络流 [英] 7zip compress network stream

问题描述

我会想通过网络发送之前压缩文件。我认为最好的办法是7zip的，因为它是免费和开源的。

I will like to compress a file before sending it through the network. I think the best approach is 7zip because it is free and open source.

如何我用7zip的使用.NET？

我知道 7zip的是免费的，他们在C＃源代码，但由于某种原因，它是C＃的速度很慢，所以我而要求性能原因安装7zip的时候自带的DLL 7z.dll 。所以，我能够eassily元帅并调用 7z.dll 方法的方法是使用图书馆的帮助下叫的 sevenzipsharp 。例如添加该DLL到我的项目将使我做的：

I know that 7zip is free and that they have the source code in c# but for some reason it is very slow on c# so I rather call the dll 7z.dll that comes when installing 7zip for performance reasons. So the way I am able to eassily marshal and call the methods in 7z.dll is with the help of the library called sevenzipsharp . For example adding that dll to my project will enable me to do:

        // if you installed 7zip 64bit version then make sure you change plataform target
        // like on the picture I showed above!
        SevenZip.SevenZipCompressor.SetLibraryPath(@"C:\Program Files\7-Zip\7z.dll");

        var stream = System.IO.File.OpenRead(@"SomeFileToCompress.txt");
        var outputStream = System.IO.File.Create("Output.7z");

        SevenZip.SevenZipCompressor compressor = new SevenZip.SevenZipCompressor();
        compressor.CompressionMethod = SevenZip.CompressionMethod.Lzma2;
        compressor.CompressionLevel = SevenZip.CompressionLevel.Ultra;
        compressor.CompressStream(stream, outputStream);

这就是我使用C＃中7zip的。

that's how I use 7zip within c#.

现在的问题是：

我会想通过网络发送一个压缩文件。我知道我可以先进行压缩然后发送。该文件是4GB，所以我将不得不等待很长的时间才能压缩。我将硬盘上浪费了大量的空间。然后，我将最终能够发送。我认为这是复杂的。 我不知道怎么会可以发送同时它被压缩的文件。

I will like to send a compressed file over the network. I know I could compress it first then send it. The file is 4GB so I will have to wait a long time for it to compress. I will be wasting a lot of space on hard drive. then I will finally be able to send it. I think that is to complicated. I was wondering how it will be possible to send the file meanwhile it is being compressed.

推荐答案

你有没有考虑备选库 - 一个甚至不要求的7-Zip进行安装？/可用

Have you considered an alternate library - one that doesn't even require 7-Zip to be installed / available?

这张贴在 HTTP说明：// dotnetzip .codeplex.com / ：

从流内容创建zip文件，保存到一个流，提取
到流，从流中读取

creating zip files from stream content, saving to a stream, extracting to a stream, reading from a stream

与7-ZIP，DotNetZip旨在与C＃的工作/ .NET。

Unlike 7-Zip, DotNetZip is designed to work with C# / .Net.

丰盛 - 包括流媒体，可在的 http://dotnetzip.codeplex.com/wikipage?title=CS-Examples&ref​​erringTitle=Examples 。

Plenty of examples - including streaming, are available at http://dotnetzip.codeplex.com/wikipage?title=CS-Examples&referringTitle=Examples .

另一种选择是使用7-ZIP命令行版本（7z.exe），并写入到/从/输出标准读取。这将允许您使用7-Zip文件格式，同时保留所有的核心工作的本地代码（虽然有可能不会有太大的差异显著的）。

Another option is to use the 7-Zip Command Line Version (7z.exe), and write to/read from standard in/out. This would allow you to use the 7-Zip file format, while also keeping all of the core work in native code (though there likely won't be much of a significant difference).

在SevenZipSharp回首：

Looking back at SevenZipSharp:

自0.29版本，流媒体支持

Since the 0.29 release, streaming is supported.

看着的http：// sevenzipsharp.codeplex.com/SourceControl/changeset/view/59007#364711 ：

似乎你想要这个方法：

public void CompressStream(Stream inStream, Stream outStream)

感谢您在这里考虑的性能！我想太多的人会做你试图避免什么：压缩到一个临时文件，然后做的临时文件的东西。

Thank you for considering performance here! I think way too many people would do exactly what you're trying to avoid: compress to a temp file, then do something with the temp file.

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