.Net 生成压缩文件问题记录(推荐)
时间：2022-11-14 09:32:58|栏目：.NET代码|点击： 次
一、起因
由于公司开发项目需要迁移部署到Linux环境部署运行，之前项目中生成Zip压缩文件的代码逻辑在Linux运行生成压缩文件不正常。
本篇记录文件排查处理过程。
二、问题现象
- 压缩文件生成目录不正确，文件目录为：\root\ziptest\upgrade\_dsconnCfg.txt(项目部署目录)
- 压缩文件数量不正确
- 压缩文件最后修改时间不匹配
待压缩文件：
压缩结果：
三、解决过程：
1、原始实现压缩的主要逻辑：
using System.IO.Compression;
using System.IO;
/// <summary>
/// 文件压缩类
/// </summary>
public class ZipHelper
{
/// <summary>
/// 单文件压缩成ZIP
/// </summary>
/// <param name="fileSource">源文件路径</param>
/// <param name="fileOut">ZIP文件路径</param>
/// <param name="fileName">ZIP文件名</param>
/// <returns></returns>
public static bool SimpleFileZip(string fileSource, string fileOut, string fileName)
{
try
{
using (FileStream zipFileToOpen = new FileStream(fileOut, FileMode.Create))
{
using (ZipArchive archive = new ZipArchive(zipFileToOpen, ZipArchiveMode.Create))
{
ZipFile(fileSource, fileName, archive);
}
}
}
catch
{
return false;
}
return true;
}
/// <summary>
/// 多文件压缩成ZIP
/// </summary>
/// <param name="fileSource">源文件路径</param>
/// <param name="fileOut">ZIP文件路径</param>
/// <param name="fileName">ZIP文件名</param>
/// <returns></returns>
public static bool FilesZip(List<string> fileSources, string fileOut)
{
try
{
using (FileStream zipFileToOpen = new FileStream(fileOut, FileMode.Create))
{
using (ZipArchive archive = new ZipArchive(zipFileToOpen, ZipArchiveMode.Create))
{
foreach (var file in fileSources)
{ //计算相对路径
string fileName = file.Replace(AppConsts.ServerUpdateFile + "\\", "");
ZipFile(file, fileName, archive);
}
}
}
}
catch
{
return false;
}
return true;
}
private static void ZipFile(string fileSource, string fileName, ZipArchive archive)
{
ZipArchiveEntry readMeEntry = archive.CreateEntry(fileName); //设置文件最后修改时间
readMeEntry.LastWriteTime = File.GetLastWriteTime(fileSource);
using (Stream stream = readMeEntry.Open())
{
byte[] bytes = File.ReadAllBytes(fileSource);
stream.Write(bytes, 0, bytes.Length);
}
}
}
2、生成路径不正确问题：通过对代码检测发现，在代码中处理逻辑对目录路径替换处理时：使用了"\\"；导致在Linux代码无效。修改对于代码为以下内容：
/// <summary>
/// 多文件压缩成ZIP
/// </summary>
/// <param name="fileSource">源文件路径</param>
/// <param name="fileOut">ZIP文件路径</param>
/// <param name="fileName">ZIP文件名</param>
/// <returns></returns>
public static bool FilesZip(List<string> fileSources, string fileOut)
{
try
{
using (FileStream zipFileToOpen = new FileStream(fileOut, FileMode.OpenOrCreate))
{
using (ZipArchive archive = new ZipArchive(zipFileToOpen, ZipArchiveMode.Update))
{
foreach (var file in fileSources)
{ //计算压缩文件相对路径：目录/文件名
string fileName = file.Replace(AppConsts.ServerUpdateFile + Path.DirectorySeparatorChar, "");
ZipFile(file, fileName, archive);
}
}
}
}
catch (Exception ex)
{
Console.WriteLine($"ERROR：{ex}");
return false;
}
return true;
}
3、排查生成文件数量异常问题，输出异常信息。
ERROR：Cannot modify entry in Create mode after entry has been opened for writing.
at System.IO.Compression.ZipArchiveEntry.set_LastWriteTime(DateTimeOffset value)
at zlWebPluginsUpgradeServer.Upgrade.ZipHelper.ZipFile(String fileSource, String fileName, ZipArchive archive) in F:\coding\ZlsoftClientService\zlWebPluginsUpgradeServer\UpgradeMode\ZipHelper.cs:line 84
at zlWebPluginsUpgradeServer.Upgrade.ZipHelper.FilesZip(List`1 fileSources, String fileOut) in F:\coding\ZlsoftClientService\zlWebPluginsUpgradeServer\UpgradeMode\ZipHelper.cs:line 62
发现因为生成压缩文件后设置最后修改时间异常，导致生成压缩文件数量不正确；且最后修改时间不匹配。
4、根据日志，调整
using (ZipArchive archive = new ZipArchive(zipFileToOpen, ZipArchiveMode.Update))
到此以上在Linux中生成压缩文件问题都已解决。
四、总结：
1、代码中路径操作，不要使用固定字符串；应该使用Path类提供的相关字段、方法操作
2、设置压缩项属性时，需要使用Update模式。
最后放上压缩帮助类：
/// <summary>
/// 文件压缩类
/// </summary>
public class ZipHelper
{
/// <summary>
/// 单文件压缩成ZIP
/// </summary>
/// <param name="fileSource">源文件路径</param>
/// <param name="fileOut">ZIP文件路径</param>
/// <param name="fileName">ZIP文件名：相对路径</param>
/// <returns></returns>
public static void SimpleFileZip(string fileSource, string fileOut, string fileName)
{
using (FileStream zipFileToOpen = new FileStream(fileOut, FileMode.OpenOrCreate))
{
using (ZipArchive archive = new ZipArchive(zipFileToOpen, ZipArchiveMode.Update))
{
fileName = fileName.Trim(Path.DirectorySeparatorChar);
ZipFile(fileSource, fileName, archive);
}
}
}
/// <summary>
/// 多文件压缩成ZIP
/// </summary>
/// <param name="fileSource">源文件路径</param>
/// <param name="fileOut">ZIP文件路径</param>
/// <param name="fileName">ZIP文件名</param>
/// <returns></returns>
public static void FilesZip(List<string> fileSources, string fileOut)
{
using (FileStream zipFileToOpen = new FileStream(fileOut, FileMode.OpenOrCreate))
{
using (ZipArchive archive = new ZipArchive(zipFileToOpen, ZipArchiveMode.Update))
{
foreach (var file in fileSources)
{
string fileName = file.Replace(AppConsts.ServerUpdateFile + Path.DirectorySeparatorChar, "");
ZipFile(file, fileName, archive);
}
}
}
}
/// <summary>
/// 压缩指定文件夹
/// </summary>
/// <param name="sourceDirectory"></param>
/// <param name="fileOut"></param>
public static void DirectoryZip(string sourceDirectory, string fileOut)
{
string[] allFiles = Directory.GetFiles(sourceDirectory, "", SearchOption.AllDirectories);
using (FileStream zipFileToOpen = new FileStream(fileOut, FileMode.OpenOrCreate))
{
using (ZipArchive archive = new ZipArchive(zipFileToOpen, ZipArchiveMode.Update))
{
foreach (var file in allFiles)
{
//获取压缩文件相对目录
string fileName = file.Replace(sourceDirectory + Path.DirectorySeparatorChar, "");
ZipFile(file, fileName, archive);
}
}
}
}
/// <summary>
/// 解压文件到指定目录
/// </summary>
/// <param name="upZipDirPath"></param>
/// <param name="zipPath"></param>
public static void UnZip(string upZipDirPath, string zipPath)
{
if (!Directory.Exists(upZipDirPath))
Directory.CreateDirectory(upZipDirPath);
using (FileStream zipFileToOpen = new FileStream(zipPath, FileMode.Open))
{
using (ZipArchive archive = new ZipArchive(zipFileToOpen, ZipArchiveMode.Read))
{
archive.ExtractToDirectory(upZipDirPath);
}
}
}
/// <summary>
/// 生成压缩文件
/// </summary>
/// <param name="fileSource">源文件</param>
/// <param name="fileName">压缩文件相对目录</param>
/// <param name="archive">压缩文件包</param>
private static void ZipFile(string fileSource, string fileName, ZipArchive archive)
{
ZipArchiveEntry readMeEntry = archive.CreateEntry(fileName);
readMeEntry.LastWriteTime = File.GetLastWriteTime(fileSource);
using (Stream stream = readMeEntry.Open())
{
byte[] bytes = File.ReadAllBytes(fileSource);
stream.Write(bytes, 0, bytes.Length);
}
}
}
