/// <summary>
/// Reads a zip file archive from the named filesystem file using the
/// specified options.
/// </summary>
///
/// <remarks>
/// <para>
/// This version of the <c>Read()</c> method allows the caller to pass
/// in a <c>TextWriter</c> an <c>Encoding</c>, via an instance of the
/// <c>ReadOptions</c> class. The <c>ZipFile</c> is read in using the
/// specified encoding for entries where UTF-8 encoding is not
/// explicitly specified.
/// </para>
/// </remarks>
///
/// <example>
///
/// <para>
/// This example shows how to read a zip file using the Big-5 Chinese
/// code page (950), and extract each entry in the zip file, while
/// sending status messages out to the Console.
/// </para>
///
/// <para>
/// For this code to work as intended, the zipfile must have been
/// created using the big5 code page (CP950). This is typical, for
/// example, when using WinRar on a machine with CP950 set as the
/// default code page. In that case, the names of entries within the
/// Zip archive will be stored in that code page, and reading the zip
/// archive must be done using that code page. If the application did
/// not use the correct code page in ZipFile.Read(), then names of
/// entries within the zip archive would not be correctly retrieved.
/// </para>
///
/// <code lang="C#">
/// string zipToExtract = "MyArchive.zip";
/// string extractDirectory = "extract";
/// var options = new ReadOptions
/// {
/// StatusMessageWriter = System.Console.Out,
/// Encoding = System.Text.Encoding.GetEncoding(950)
/// };
/// using (ZipFile zip = ZipFile.Read(zipToExtract, options))
/// {
/// foreach (ZipEntry e in zip)
/// {
/// e.Extract(extractDirectory);
/// }
/// }
/// </code>
///
///
/// <code lang="VB">
/// Dim zipToExtract as String = "MyArchive.zip"
/// Dim extractDirectory as String = "extract"
/// Dim options as New ReadOptions
/// options.Encoding = System.Text.Encoding.GetEncoding(950)
/// options.StatusMessageWriter = System.Console.Out
/// Using zip As ZipFile = ZipFile.Read(zipToExtract, options)
/// Dim e As ZipEntry
/// For Each e In zip
/// e.Extract(extractDirectory)
/// Next
/// End Using
/// </code>
/// </example>
///
///
/// <example>
///
/// <para>
/// This example shows how to read a zip file using the default
/// code page, to remove entries that have a modified date before a given threshold,
/// sending status messages out to a <c>StringWriter</c>.
/// </para>
///
/// <code lang="C#">
/// var options = new ReadOptions
/// {
/// StatusMessageWriter = new System.IO.StringWriter()
/// };
/// using (ZipFile zip = ZipFile.Read("PackedDocuments.zip", options))
/// {
/// var Threshold = new DateTime(2007,7,4);
/// // We cannot remove the entry from the list, within the context of
/// // an enumeration of said list.
/// // So we add the doomed entry to a list to be removed later.
/// // pass 1: mark the entries for removal
/// var MarkedEntries = new System.Collections.Generic.List<ZipEntry>();
/// foreach (ZipEntry e in zip)
/// {
/// if (e.LastModified < Threshold)
/// MarkedEntries.Add(e);
/// }
/// // pass 2: actually remove the entry.
/// foreach (ZipEntry zombie in MarkedEntries)
/// zip.RemoveEntry(zombie);
/// zip.Comment = "This archive has been updated.";
/// zip.Save();
/// }
/// // can now use contents of sw, eg store in an audit log
/// </code>
///
/// <code lang="VB">
/// Dim options as New ReadOptions
/// options.StatusMessageWriter = New System.IO.StringWriter
/// Using zip As ZipFile = ZipFile.Read("PackedDocuments.zip", options)
/// Dim Threshold As New DateTime(2007, 7, 4)
/// ' We cannot remove the entry from the list, within the context of
/// ' an enumeration of said list.
/// ' So we add the doomed entry to a list to be removed later.
/// ' pass 1: mark the entries for removal
/// Dim MarkedEntries As New System.Collections.Generic.List(Of ZipEntry)
/// Dim e As ZipEntry
/// For Each e In zip
/// If (e.LastModified < Threshold) Then
/// MarkedEntries.Add(e)
/// End If
/// Next
/// ' pass 2: actually remove the entry.
/// Dim zombie As ZipEntry
/// For Each zombie In MarkedEntries
/// zip.RemoveEntry(zombie)
/// Next
/// zip.Comment = "This archive has been updated."
/// zip.Save
/// End Using
/// ' can now use contents of sw, eg store in an audit log
/// </code>
/// </example>
///
/// <exception cref="System.Exception">
/// Thrown if the zipfile cannot be read. The implementation of
/// this method relies on <c>System.IO.File.OpenRead</c>, which
/// can throw a variety of exceptions, including specific
/// exceptions if a file is not found, an unauthorized access
/// exception, exceptions for poorly formatted filenames, and so
/// on.
/// </exception>
///
/// <param name="fileName">
/// The name of the zip archive to open.
/// This can be a fully-qualified or relative pathname.
/// </param>
///
/// <param name="options">
/// The set of options to use when reading the zip file.
/// </param>
///
/// <returns>The ZipFile instance read from the zip archive.</returns>
///
/// <seealso cref="ZipFile.Read(Stream, ReadOptions)"/>
///
internal static ZipFile Read(string fileName, ReadOptions options)
{
Stream stream = null;
try
{
string fullPath = GetFullPath(fileName);
var file = FileSystem.Current.GetFileFromPathAsync(fullPath).ExecuteSync();
if (file == null)
{
throw new FileNotFoundException(string.Format("That file ({0}) does not exist!", fileName));
}
// don't close the stream, leave it up to the zip file
stream = file.OpenAsync(FileAccess.Read).ExecuteSync();
// handle segmented archives
var segmentsManager = new FileSystemZipSegmentedStreamManager(fullPath);
var zipFile = ZipFile.Read(stream, segmentsManager, options);
zipFile.SetShouldDisposeReadStream(true);
zipFile.Name = fullPath;
return(zipFile);
}
catch (Exception e1)
{
if (stream != null)
{
stream.Dispose();
}
throw new ZipException(String.Format("{0} is not a valid zip file", fileName), e1);
}
}
/// <summary>
/// Reads a zip file archive from the named filesystem file using the
/// specified options.
/// </summary>
///
/// <remarks>
/// <para>
/// This version of the <c>Read()</c> method allows the caller to pass
/// in a <c>TextWriter</c> an <c>Encoding</c>, via an instance of the
/// <c>ReadOptions</c> class. The <c>ZipFile</c> is read in using the
/// specified encoding for entries where UTF-8 encoding is not
/// explicitly specified.
/// </para>
/// </remarks>
///
/// <example>
///
/// <para>
/// This example shows how to read a zip file using the Big-5 Chinese
/// code page (950), and extract each entry in the zip file, while
/// sending status messages out to the Console.
/// </para>
///
/// <para>
/// For this code to work as intended, the zipfile must have been
/// created using the big5 code page (CP950). This is typical, for
/// example, when using WinRar on a machine with CP950 set as the
/// default code page. In that case, the names of entries within the
/// Zip archive will be stored in that code page, and reading the zip
/// archive must be done using that code page. If the application did
/// not use the correct code page in ZipFile.Read(), then names of
/// entries within the zip archive would not be correctly retrieved.
/// </para>
///
/// <code lang="C#">
/// string zipToExtract = "MyArchive.zip";
/// string extractDirectory = "extract";
/// var options = new ReadOptions
/// {
/// StatusMessageWriter = System.Console.Out,
/// Encoding = System.Text.Encoding.GetEncoding(950)
/// };
/// using (ZipFile zip = ZipFile.Read(zipToExtract, options))
/// {
/// foreach (ZipEntry e in zip)
/// {
/// e.Extract(extractDirectory);
/// }
/// }
/// </code>
///
///
/// <code lang="VB">
/// Dim zipToExtract as String = "MyArchive.zip"
/// Dim extractDirectory as String = "extract"
/// Dim options as New ReadOptions
/// options.Encoding = System.Text.Encoding.GetEncoding(950)
/// options.StatusMessageWriter = System.Console.Out
/// Using zip As ZipFile = ZipFile.Read(zipToExtract, options)
/// Dim e As ZipEntry
/// For Each e In zip
/// e.Extract(extractDirectory)
/// Next
/// End Using
/// </code>
/// </example>
///
///
/// <example>
///
/// <para>
/// This example shows how to read a zip file using the default
/// code page, to remove entries that have a modified date before a given threshold,
/// sending status messages out to a <c>StringWriter</c>.
/// </para>
///
/// <code lang="C#">
/// var options = new ReadOptions
/// {
/// StatusMessageWriter = new System.IO.StringWriter()
/// };
/// using (ZipFile zip = ZipFile.Read("PackedDocuments.zip", options))
/// {
/// var Threshold = new DateTime(2007,7,4);
/// // We cannot remove the entry from the list, within the context of
/// // an enumeration of said list.
/// // So we add the doomed entry to a list to be removed later.
/// // pass 1: mark the entries for removal
/// var MarkedEntries = new System.Collections.Generic.List<ZipEntry>();
/// foreach (ZipEntry e in zip)
/// {
/// if (e.LastModified < Threshold)
/// MarkedEntries.Add(e);
/// }
/// // pass 2: actually remove the entry.
/// foreach (ZipEntry zombie in MarkedEntries)
/// zip.RemoveEntry(zombie);
/// zip.Comment = "This archive has been updated.";
/// zip.Save();
/// }
/// // can now use contents of sw, eg store in an audit log
/// </code>
///
/// <code lang="VB">
/// Dim options as New ReadOptions
/// options.StatusMessageWriter = New System.IO.StringWriter
/// Using zip As ZipFile = ZipFile.Read("PackedDocuments.zip", options)
/// Dim Threshold As New DateTime(2007, 7, 4)
/// ' We cannot remove the entry from the list, within the context of
/// ' an enumeration of said list.
/// ' So we add the doomed entry to a list to be removed later.
/// ' pass 1: mark the entries for removal
/// Dim MarkedEntries As New System.Collections.Generic.List(Of ZipEntry)
/// Dim e As ZipEntry
/// For Each e In zip
/// If (e.LastModified < Threshold) Then
/// MarkedEntries.Add(e)
/// End If
/// Next
/// ' pass 2: actually remove the entry.
/// Dim zombie As ZipEntry
/// For Each zombie In MarkedEntries
/// zip.RemoveEntry(zombie)
/// Next
/// zip.Comment = "This archive has been updated."
/// zip.Save
/// End Using
/// ' can now use contents of sw, eg store in an audit log
/// </code>
/// </example>
///
/// <exception cref="System.Exception">
/// Thrown if the zipfile cannot be read. The implementation of
/// this method relies on <c>System.IO.File.OpenRead</c>, which
/// can throw a variety of exceptions, including specific
/// exceptions if a file is not found, an unauthorized access
/// exception, exceptions for poorly formatted filenames, and so
/// on.
/// </exception>
///
/// <param name="fileName">
/// The name of the zip archive to open.
/// This can be a fully-qualified or relative pathname.
/// </param>
///
/// <param name="options">
/// The set of options to use when reading the zip file.
/// </param>
///
/// <returns>The ZipFile instance read from the zip archive.</returns>
///
/// <seealso cref="ZipFile.Read(Stream, ReadOptions)"/>
///
internal static ZipFile Read(string fileName, ReadOptions options)
{
Stream stream = null;
try
{
string fullPath = GetFullPath(fileName);
var file = FileSystem.Current.GetFileFromPathAsync(fullPath).ExecuteSync();
if (file == null)
{
throw new FileNotFoundException(string.Format("That file ({0}) does not exist!", fileName));
}
// don't close the stream, leave it up to the zip file
stream = file.OpenAsync(FileAccess.Read).ExecuteSync();
// handle segmented archives
var segmentsManager = new FileSystemZipSegmentedStreamManager(fullPath);
var zipFile = ZipFile.Read(stream, segmentsManager, options);
zipFile.SetShouldDisposeReadStream(true);
zipFile.Name = fullPath;
return zipFile;
}
catch (Exception e1)
{
if (stream != null)
{
stream.Dispose();
}
throw new ZipException(String.Format("{0} is not a valid zip file", fileName), e1);
}
}
/// <summary>
/// Save the file to a new zipfile, with the given name.
/// </summary>
///
/// <remarks>
/// <para>
/// This method allows the application to explicitly specify the name of the zip
/// file when saving. Use this when creating a new zip file, or when
/// updating a zip archive.
/// </para>
///
/// <para>
/// An application can also save a zip archive in several places by calling this
/// method multiple times in succession, with different filenames.
/// </para>
///
/// <para>
/// The <c>ZipFile</c> instance is written to storage, typically a zip file in a
/// filesystem, only when the caller calls <c>Save</c>. The Save operation writes
/// the zip content to a temporary file, and then renames the temporary file
/// to the desired name. If necessary, this method will delete a pre-existing file
/// before the rename.
/// </para>
///
/// </remarks>
///
/// <exception cref="System.ArgumentException">
/// Thrown if you specify a directory for the filename.
/// </exception>
///
/// <param name="fileName">
/// The name of the zip archive to save to. Existing files will
/// be overwritten with great prejudice.
/// </param>
///
/// <example>
/// This example shows how to create and Save a zip file.
/// <code>
/// using (ZipFile zip = new ZipFile())
/// {
/// zip.AddDirectory(@"c:\reports\January");
/// zip.Save("January.zip");
/// }
/// </code>
///
/// <code lang="VB">
/// Using zip As New ZipFile()
/// zip.AddDirectory("c:\reports\January")
/// zip.Save("January.zip")
/// End Using
/// </code>
///
/// </example>
///
/// <example>
/// This example shows how to update a zip file.
/// <code>
/// using (ZipFile zip = ZipFile.Read("ExistingArchive.zip"))
/// {
/// zip.AddFile("NewData.csv");
/// zip.Save("UpdatedArchive.zip");
/// }
/// </code>
///
/// <code lang="VB">
/// Using zip As ZipFile = ZipFile.Read("ExistingArchive.zip")
/// zip.AddFile("NewData.csv")
/// zip.Save("UpdatedArchive.zip")
/// End Using
/// </code>
///
/// </example>
public static void Save(this ZipFile zipFile, String fileName)
{
if (fileName == null)
{
throw new ArgumentNullException("fileName");
}
string fullPath = GetFullPath(fileName);
if (FileSystem.Current.GetFolderFromPathAsync(fullPath).ExecuteSync() != null)
{
throw new ZipException("Bad Directory", new ArgumentException("That name specifies an existing directory. Please specify a filename.", "fileName"));
}
var fullDirectoryName = Path.GetDirectoryName(fullPath);
var directoryName = Path.GetDirectoryName(fileName);
var folder = FileSystem.Current.GetFolderFromPathAsync(fullDirectoryName).ExecuteSync();
if (folder == null)
{
throw new ZipException("Bad Directory", new ArgumentException(string.Format("That folder ({0}) does not exist!", directoryName)));
}
// check up here so we may shortcut some IO operations in the future :)
var fileExists = folder.CheckExistsAsync(fullPath).ExecuteSync() == ExistenceCheckResult.FileExists;
// write to a temporary file so that we can read from the same zip when saving
var tmpName = Path.GetRandomFileName();
try
{
ZipSegmentedStreamManager segmentsManager = null;
if (zipFile.MaxOutputSegmentSize != 0)
{
// save segmented files using the segments manager
var manager = new FileSystemZipSegmentedStreamManager(fullPath);
segmentsManager = manager;
zipFile.Save(segmentsManager);
tmpName = manager.TemporaryName;
}
else
{
// save
var tmpFile = folder.CreateFileAsync(tmpName, CreationCollisionOption.ReplaceExisting).ExecuteSync();
tmpName = tmpFile.Path;
using (var tmpStream = tmpFile.OpenAsync(FileAccess.ReadAndWrite).ExecuteSync())
{
zipFile.Save(tmpStream);
}
}
// if it wasn't canceled
if (!zipFile.IsSaveOperationCanceled())
{
// disconnect from the stream
zipFile.SetUnderlyingZipStream(null);
// move the temporary file into position
zipFile.OnSaveEvent(ZipProgressEventType.Saving_BeforeRenameTempArchive);
ZipEntryExtensions.MoveFileInPlace(fileExists, fullPath, tmpName);
zipFile.OnSaveEvent(ZipProgressEventType.Saving_AfterRenameTempArchive);
// and now set the read stream to be that of the new file
var targetFile = FileSystem.Current.GetFileFromPathAsync(fullPath).ExecuteSync();
var fileStream = targetFile.OpenAsync(FileAccess.Read).ExecuteSync();
zipFile.SetUnderlyingZipSegmentedStreamManager(segmentsManager);
zipFile.SetUnderlyingZipStream(fileStream);
zipFile.SetShouldDisposeReadStream(true);
zipFile.Name = fullPath;
// so we can shortcut the existance checks
tmpName = null;
}
}
finally
{
// An exception has occurred. If the file exists, check
// to see if it existed before we tried extracting. If
// it did not, attempt to remove the target file. There
// is a small possibility that the existing file has
// been extracted successfully, overwriting a previously
// existing file, and an exception was thrown after that
// but before final completion (setting times, etc). In
// that case the file will remain, even though some
// error occurred. Nothing to be done about it.
if (tmpName != null)
{
var tmpFile = folder.GetFileAsync(tmpName).ExecuteSync();
tmpFile.DeleteAsync();
}
}
}
/// <summary>
/// Save the file to a new zipfile, with the given name.
/// </summary>
///
/// <remarks>
/// <para>
/// This method allows the application to explicitly specify the name of the zip
/// file when saving. Use this when creating a new zip file, or when
/// updating a zip archive.
/// </para>
///
/// <para>
/// An application can also save a zip archive in several places by calling this
/// method multiple times in succession, with different filenames.
/// </para>
///
/// <para>
/// The <c>ZipFile</c> instance is written to storage, typically a zip file in a
/// filesystem, only when the caller calls <c>Save</c>. The Save operation writes
/// the zip content to a temporary file, and then renames the temporary file
/// to the desired name. If necessary, this method will delete a pre-existing file
/// before the rename.
/// </para>
///
/// </remarks>
///
/// <exception cref="System.ArgumentException">
/// Thrown if you specify a directory for the filename.
/// </exception>
///
/// <param name="fileName">
/// The name of the zip archive to save to. Existing files will
/// be overwritten with great prejudice.
/// </param>
///
/// <example>
/// This example shows how to create and Save a zip file.
/// <code>
/// using (ZipFile zip = new ZipFile())
/// {
/// zip.AddDirectory(@"c:\reports\January");
/// zip.Save("January.zip");
/// }
/// </code>
///
/// <code lang="VB">
/// Using zip As New ZipFile()
/// zip.AddDirectory("c:\reports\January")
/// zip.Save("January.zip")
/// End Using
/// </code>
///
/// </example>
///
/// <example>
/// This example shows how to update a zip file.
/// <code>
/// using (ZipFile zip = ZipFile.Read("ExistingArchive.zip"))
/// {
/// zip.AddFile("NewData.csv");
/// zip.Save("UpdatedArchive.zip");
/// }
/// </code>
///
/// <code lang="VB">
/// Using zip As ZipFile = ZipFile.Read("ExistingArchive.zip")
/// zip.AddFile("NewData.csv")
/// zip.Save("UpdatedArchive.zip")
/// End Using
/// </code>
///
/// </example>
public static void Save(this ZipFile zipFile, String fileName)
{
if (fileName == null)
{
throw new ArgumentNullException("fileName");
}
string fullPath = GetFullPath(fileName);
if (FileSystem.Current.GetFolderFromPathAsync(fullPath).ExecuteSync() != null)
throw new ZipException("Bad Directory", new ArgumentException("That name specifies an existing directory. Please specify a filename.", "fileName"));
var fullDirectoryName = Path.GetDirectoryName(fullPath);
var directoryName = Path.GetDirectoryName(fileName);
var folder = FileSystem.Current.GetFolderFromPathAsync(fullDirectoryName).ExecuteSync();
if (folder == null)
throw new ZipException("Bad Directory", new ArgumentException(string.Format("That folder ({0}) does not exist!", directoryName)));
// check up here so we may shortcut some IO operations in the future :)
var fileExists = folder.CheckExistsAsync(fullPath).ExecuteSync() == ExistenceCheckResult.FileExists;
// write to a temporary file so that we can read from the same zip when saving
var tmpName = Path.GetRandomFileName();
try
{
ZipSegmentedStreamManager segmentsManager = null;
if (zipFile.MaxOutputSegmentSize != 0)
{
// save segmented files using the segments manager
var manager = new FileSystemZipSegmentedStreamManager(fullPath);
segmentsManager = manager;
zipFile.Save(segmentsManager);
tmpName = manager.TemporaryName;
}
else
{
// save
var tmpFile = folder.CreateFileAsync(tmpName, CreationCollisionOption.ReplaceExisting).ExecuteSync();
tmpName = tmpFile.Path;
using (var tmpStream = tmpFile.OpenAsync(FileAccess.ReadAndWrite).ExecuteSync())
{
zipFile.Save(tmpStream);
}
}
// if it wasn't canceled
if (!zipFile.IsSaveOperationCanceled())
{
// disconnect from the stream
zipFile.SetUnderlyingZipStream(null);
// move the temporary file into position
zipFile.OnSaveEvent(ZipProgressEventType.Saving_BeforeRenameTempArchive);
ZipEntryExtensions.MoveFileInPlace(fileExists, fullPath, tmpName);
zipFile.OnSaveEvent(ZipProgressEventType.Saving_AfterRenameTempArchive);
// and now set the read stream to be that of the new file
var targetFile = FileSystem.Current.GetFileFromPathAsync(fullPath).ExecuteSync();
var fileStream = targetFile.OpenAsync(FileAccess.Read).ExecuteSync();
zipFile.SetUnderlyingZipSegmentedStreamManager(segmentsManager);
zipFile.SetUnderlyingZipStream(fileStream);
zipFile.SetShouldDisposeReadStream(true);
zipFile.Name = fullPath;
// so we can shortcut the existance checks
tmpName = null;
}
}
finally
{
// An exception has occurred. If the file exists, check
// to see if it existed before we tried extracting. If
// it did not, attempt to remove the target file. There
// is a small possibility that the existing file has
// been extracted successfully, overwriting a previously
// existing file, and an exception was thrown after that
// but before final completion (setting times, etc). In
// that case the file will remain, even though some
// error occurred. Nothing to be done about it.
if (tmpName != null)
{
var tmpFile = folder.GetFileAsync(tmpName).ExecuteSync();
tmpFile.DeleteAsync();
}
}
}
