.net core 解压文件并压缩子文件夹

Question

我有一个 zip 文件的字节 []。我需要在内存中解压缩文件并在 zip 中找到“dist”文件夹（总会有一个 dist 文件夹）并创建一个新的 zip 文件，其中包含“dist”文件夹中的任何内容。

“dist”文件夹中可以包含文件和子文件夹。我需要 byte[] 中的新 zip 文件，因此只能在内存中操作，无法访问物理磁盘。

我尝试使用“SharpZipLib”没有运气。我正在使用 .net 核心 2.0

Answer 1

请尝试下面的代码

   using (MemoryStream srcMemoryStream = new MemoryStream())
        {
            using (MemoryStream targetMemoryStream = new MemoryStream())
            {
                // to have a byte array, I just read a file and store it into a memory stream
                using (FileStream sourceZipFile = new FileStream(@"f:\source-file.zip", FileMode.Open))
                {
                    sourceZipFile.CopyTo(srcMemoryStream);
                }

                using (ZipArchive srcArchive = new ZipArchive(srcMemoryStream, ZipArchiveMode.Read))
                {
                    using (ZipArchive destArchive = new ZipArchive(targetMemoryStream, ZipArchiveMode.Create, true))
                    {

                        srcArchive.Entries
                            .Where(entry => entry.FullName.Contains("dist/"))
                            .ToList()
                            .ForEach((entry) =>
                            {
                                // i simply create the same folder with the same structure in other archive
                                // if you want to change the structure, you have to rename or remove parts of 
                                // the path like below
                                ///  var newEntryName = entry.FullName.Replace("files/dist/", "new-dist/");
                                ///  ZipArchiveEntry newEntry = destArchive.CreateEntry(newEntryName);
                                ZipArchiveEntry newEntry = destArchive.CreateEntry(entry.FullName);
                                using (Stream srcEntry = entry.Open())
                                {
                                    using (Stream destEntry = newEntry.Open())
                                    {
                                        srcEntry.CopyTo(destEntry);
                                    }
                                }
                            });
                    }
                }

                // i just write the zip file on disk to make sure that it works, your desire state is already achieved
                // before this line of code, and the result byte Array is inside the targetMemoryStream memory stream
                using (FileStream fs = new FileStream(@"f:/destination-file.zip", FileMode.Create))
                {
                    targetMemoryStream.WriteTo(fs);
                    targetMemoryStream.Flush();
                    fs.Flush(true);
                }

            }
        }

您可以将这些字节数组存储在内存流中，我只是读取一个文件并将其存储到内存流中，但您可以简单地使用以下代码：

MemoryStream srcMemoryStream = new MemoryStream();
srcMemoryStream.Write(byteArray, 0, byteArray.Length);