/// <summary>
/// Adds the file to the <see cref="ZipArchive"/> with all the needed information
/// </summary>
/// <param name="zipArchive"><see cref="ZipArchive"/> to add the file too</param>
/// <param name="fileStream">Stream of the file contents</param>
/// <param name="filepath">Path of the file</param>
/// <param name="keepFileStreamOpen">If we should keep <see cref="fileStream"/> open once done with it</param>
/// <param name="filesize">The size that the final file should be</param>
/// <param name="sha256Hash">The hash that the final file should be</param>
private static bool AddFile(
ZipArchive zipArchive,
Stream fileStream,
string filepath,
bool keepFileStreamOpen = true,
long?filesize = null,
string?sha256Hash = null)
{
//Create token and then wait if something else is currently adding a file
filesize ??= fileStream.Length;
//Create and add the file contents to the zip
lock (zipArchive)
{
var zipFileStream = zipArchive.CreateEntry(filepath).Open();
fileStream.CopyTo(zipFileStream);
zipFileStream.Dispose();
//Create .shasum file if we have some content from the fileStream
sha256Hash ??= SHA256Util.CreateSHA256Hash(fileStream);
using var zipShasumStream = zipArchive.CreateEntry(Path.ChangeExtension(filepath, ".shasum")).Open();
using var textWriter = new StreamWriter(zipShasumStream);
textWriter.Write($"{sha256Hash} {filesize}");
}
//Dispose fileStream if we been asked to
if (!keepFileStreamOpen)
{
fileStream.Dispose();
}
return(true);
}
private static bool IsDeltaFile(string baseFileLocation, string newFileLocation)
{
//Get the two files from disk
using var baseFileStream = File.OpenRead(baseFileLocation);
using var newFileStream = File.OpenRead(newFileLocation);
//See if the filesize or hash is different, if so then the file has changed
var hasChanged =
baseFileStream.Length != newFileStream.Length ||
SHA256Util.CreateSHA256Hash(baseFileStream) != SHA256Util.CreateSHA256Hash(newFileStream);
return(hasChanged);
}
public void IsValidReleaseEntry_OldVersionCheck()
{
var data = new byte[69];
Randomizer.NextBytes(data);
var hash = SHA256Util.CreateSHA256Hash(data);
var version = new SemanticVersion(1, 2, 0);
Assert.DoesNotThrow(() =>
new ReleaseEntry(hash, "wew", data.Length, false, version, string.Empty));
Assert.Throws <Exception>(() =>
new ReleaseEntry(hash, "wew", data.Length, true, version, string.Empty));
Assert.DoesNotThrow(() =>
new ReleaseEntry(hash, "wew", data.Length, true, version, string.Empty, new SemanticVersion(1, 1, 0)));
}
private static ReleaseEntry CreateUpdate(string fileLocation, SemanticVersion?version = null, SemanticVersion?oldVersion = null)
{
//Get details about update file
var releaseFileLocation = fileLocation;
var fileStream = File.OpenRead(releaseFileLocation);
var fileHash = SHA256Util.CreateSHA256Hash(fileStream);
var fileLength = fileStream.Length;
fileStream.Dispose();
return(new ReleaseEntry(
fileHash,
Path.GetFileName(releaseFileLocation),
fileLength,
true,
version ?? SemanticVersion.Parse("2021.129.1"),
Path.GetDirectoryName(fileLocation),
oldVersion ?? SemanticVersion.Parse("2021.129.0")));
}
/// <summary>
/// Creates a delta file and then adds it the <see cref="ZipArchive"/>
/// </summary>
/// <param name="tempFolder">Where the temp folder is located</param>
/// <param name="zipArchive"><see cref="ZipArchive"/> to add the file too</param>
/// <param name="baseFileLocation">Old file</param>
/// <param name="newFileLocation">New file</param>
/// <param name="intendedOs">What OS this delta file will be intended for</param>
/// <param name="progress">Progress of creating delta file (If possible)</param>
/// <param name="extensionEnd">What to add onto the end of the extension (If needed)</param>
/// <returns>If we was able to create the delta file</returns>
private bool AddDeltaFile(
TemporaryFolder tempFolder,
ZipArchive zipArchive,
string baseFileLocation,
string newFileLocation,
OSPlatform?intendedOs = null,
Action <double>?progress = null,
string?extensionEnd = null)
{
//Create where the delta file can be stored to grab once made
using var tmpDeltaFile = tempFolder.CreateTemporaryFile();
//Try to create diff file, outputting extension (and maybe a stream) based on what was used to make it
if (!DeltaCreation.CreateDeltaFile(
tempFolder,
baseFileLocation,
newFileLocation,
tmpDeltaFile.Location,
intendedOs,
out var extension,
out var deltaFileStream))
{
//Wasn't able to create delta file, report back as fail
_logger.Error("Wasn't able to create delta file");
return(false);
}
//Check that we got something to work with
if (deltaFileStream == null && !File.Exists(tmpDeltaFile.Location))
{
_logger.Error("We have no delta file/stream to work off somehow");
return(false);
}
//Get hash and filesize to add to file
var newFileStream = File.OpenRead(newFileLocation);
var newFilesize = newFileStream.Length;
/*Check that the delta file will take up less space, if not fail here
* as it's not worth making it a delta file (Will take more time and processing power then just copying on the user's device)*/
if ((deltaFileStream?.Length ?? new FileInfo(tmpDeltaFile.Location).Length) >= newFilesize)
{
_logger.Warning("{0} will take up more space as a delta file then as a \"new\" file, failing to trigger it being added as a new file", baseFileLocation.GetRelativePath(newFileLocation));
newFileStream.Dispose();
deltaFileStream?.Dispose();
return(false);
}
var hash = SHA256Util.CreateSHA256Hash(newFileStream);
newFileStream.Dispose();
//Grab file and add it to the set of files
deltaFileStream ??= tmpDeltaFile.GetStream(FileMode.Open);
var addSuccessful = AddFile(
zipArchive,
deltaFileStream,
baseFileLocation.GetRelativePath(newFileLocation) + extension + extensionEnd,
filesize: newFilesize,
sha256Hash: hash);
//Dispose stream and report back if we was able to add file
deltaFileStream.Dispose();
return(addSuccessful);
}
public bool CreateDeltaPackage(
ApplicationMetadata applicationMetadata,
string newVersionLocation,
SemanticVersion newVersion,
string baseVersionLocation,
SemanticVersion oldVersion,
string outputFolder,
string deltaUpdateLocation,
OSPlatform?intendedOs = null,
Action <double>?progress = null)
{
if (!Directory.Exists(newVersionLocation) ||
!Directory.Exists(baseVersionLocation))
{
_logger.Error("One of the folders don't exist, can't create delta update....");
return(false);
}
_logger.Debug("Creating delta file");
var zipArchive = CreateZipArchive(deltaUpdateLocation);
var tempFolder = new TemporaryFolder(applicationMetadata.TempFolder);
void Cleanup()
{
lock (zipArchive)
{
zipArchive.Dispose();
}
tempFolder.Dispose();
progress?.Invoke(1);
}
//Get all the files that are in the new version (Removing the Path so we only have the relative path of the file)
var newVersionFiles = Directory.EnumerateFiles(newVersionLocation, "*", SearchOption.AllDirectories)
.RemovePath(newVersionLocation).ToArray();
//and get the files from the old version
var baseVersionFiles = Directory.EnumerateFiles(baseVersionLocation, "*", SearchOption.AllDirectories)
.RemovePath(baseVersionLocation).ToArray();
//Find any files that are in both version and process them based on if they had any changes
var sameFiles = newVersionFiles.Where(x => baseVersionFiles.Contains(x)).ToArray();
var newFiles = newVersionFiles.Where(x => !sameFiles.Contains(x)).ToArray();
var progressReport = new ProgressReport(newFiles.Length + sameFiles.Length, progress);
var deltaFiles = new List <string>(sameFiles.Length);
//First process any files that didn't change, don't even count them in the progress as it will be quick af
_logger.Information("Processing files that are in both versions");
foreach (var maybeDeltaFile in sameFiles)
{
_logger.Debug("Processing possible delta file {0}", maybeDeltaFile);
var newFileLocation = Path.Combine(newVersionLocation, maybeDeltaFile);
/*See if we got a delta file, if so then store it for
* processing after files that haven't changed*/
if (IsDeltaFile(Path.Combine(baseVersionLocation, maybeDeltaFile),
newFileLocation))
{
deltaFiles.Add(maybeDeltaFile);
continue;
}
//Add a pointer to the file that hasn't changed
_logger.Debug("{0} hasn't changed, processing as unchanged file", maybeDeltaFile);
using var fileStream = File.OpenRead(newFileLocation);
if (AddSameFile(zipArchive, maybeDeltaFile, SHA256Util.CreateSHA256Hash(fileStream)))
{
progressReport.ProcessedFile();
continue;
}
_logger.Warning("We wasn't able to add {0} as a file that was unchanged, adding as a \"new\" file",
maybeDeltaFile);
//We wasn't able to add the file as a pointer, try to add it as a new file
if (!AddNewFile(zipArchive, fileStream, maybeDeltaFile))
{
//Hard bail if we can't even do that
_logger.Error("Wasn't able to process {0} as a new file as well, bailing", maybeDeltaFile);
Cleanup();
return(false);
}
progressReport.ProcessedFile();
}
//TODO: add "moved files"
//Now process files that was added into the new version
_logger.Information("Processing files that only exist in the new version");
foreach (var newFile in newFiles)
{
_logger.Debug("Processing new file {0}", newFile);
//Process new file
using var fileStream = File.OpenRead(Path.Combine(newVersionLocation, newFile));
if (AddNewFile(zipArchive, fileStream, newFile))
{
progressReport.ProcessedFile();
continue;
}
//if we can't add it then hard fail, can't do anything to save this
_logger.Error("Wasn't able to process new file, bailing");
Cleanup();
return(false);
}
//Now process files that changed
var result = Parallel.ForEach(deltaFiles, (deltaFile, state) =>
{
var deltaFileLocation = Path.Combine(newVersionLocation, deltaFile);
_logger.Debug("Processing changed file {0}", deltaFile);
//Try to add the file as a delta file
if (AddDeltaFile(tempFolder,
zipArchive,
Path.Combine(baseVersionLocation, deltaFile),
deltaFileLocation,
intendedOs,
(pro) => progressReport.PartialProcessedFile(pro)))
{
progressReport.ProcessedFile();
return;
}
//If we can't make the file as a delta file try to create it as a "new" file
_logger.Warning("Wasn't able to make delta file, adding file as \"new\" file");
using var fileStream = File.OpenRead(Path.Combine(newVersionLocation, deltaFileLocation));
if (AddNewFile(zipArchive, fileStream, deltaFile))
{
progressReport.ProcessedFile();
return;
}
//Hard bail if we can't even do that
_logger.Error("Wasn't able to process file as a new file, bailing");
Cleanup();
state.Break();
});
//This will return false if something failed
if (!result.IsCompleted)
{
return(false);
}
if (ShouldMakeLoader &&
!AddLoaderFile(
tempFolder,
applicationMetadata,
zipArchive,
newVersion,
newVersionLocation,
intendedOs,
oldVersion,
outputFolder))
{
_logger.Error("Wasn't able to create loader for this application");
Cleanup();
return(false);
}
progressReport.ProcessedFile();
//We have created the delta file if we get here, do cleanup and then report as success!
_logger.Information("We are done with creating the delta file, cleaning up");
Cleanup();
return(true);
}