/// <summary>
/// Creates a <see cref="BlobTree" /> from the ZIP archive read from the specified <see cref="Stream" />.
/// </summary>
/// <param name="stream">The <see cref="Stream" /> from which to read the ZIP archive from.</param>
/// <param name="leaveOpen">A <see cref="bool" /> value indicating whether to leave <paramref name="stream" /> open.</param>
/// <returns>
/// The <see cref="BlobTree" /> this method creates.
/// </returns>
public static BlobTree Decompress(Stream stream, bool leaveOpen)
{
Check.ArgumentNull(stream, nameof(stream));
BlobTree tree = new BlobTree();
using ZipArchive archive = new ZipArchive(stream, ZipArchiveMode.Read, leaveOpen);
foreach (ZipArchiveEntry entry in archive.Entries)
{
BlobTreeNode node = tree.Root;
foreach (string path in entry.FullName.TrimEndString(entry.Name, true, true).TrimEnd('\\').Split(new[] { '\\' }, StringSplitOptions.RemoveEmptyEntries))
{
if (!node.Nodes.HasNode(path, true))
{
node.Nodes.Add(new BlobTreeNode(path));
}
node = node.Nodes[path, true];
}
node.Blobs.Add(new Blob(entry.Name, entry.GetContent()));
}
return(tree);
}
/// <summary>
/// Creates a ZIP archive from the specified <see cref="BlobTree" /> and returns a <see cref="byte" />[] representing the compressed archive.
/// </summary>
/// <param name="blobs">A tree of <see cref="Blob" /> objects to create the ZIP archive from.</param>
/// <returns>
/// A <see cref="byte" />[] representing the compressed ZIP archive with all <see cref="Blob" /> objects from the specified tree.
/// </returns>
public static byte[] Compress(BlobTree blobs)
{
Check.ArgumentNull(blobs, nameof(blobs));
using MemoryStream memoryStream = new MemoryStream();
Compress(blobs, memoryStream);
return(memoryStream.ToArray());
}
public void BytecodeApi_IO_ZipCompression()
{
byte[] data1 = MathEx.RandomNumberGenerator.GetBytes(10000);
byte[] data2 = MathEx.RandomNumberGenerator.GetBytes(10000);
BlobTree tree = new BlobTree();
tree.Root.Blobs.Add(new Blob("file1.txt", data1));
tree.Root.Blobs.Add(new Blob("file2.txt", data2));
BlobTree decompressed = ZipCompression.Decompress(ZipCompression.Compress(tree));
Assert.IsTrue(tree.Root.Blobs[0].Compare(decompressed.Root.Blobs[0]));
Assert.IsTrue(tree.Root.Blobs[1].Compare(decompressed.Root.Blobs[1]));
}
/// <summary>
/// Creates a ZIP archive from the specified <see cref="BlobTree" /> and writes the compressed archive to <paramref name="stream" />.
/// </summary>
/// <param name="blobs">A tree of <see cref="Blob" /> objects to create the ZIP archive from.</param>
/// <param name="stream">The <see cref="Stream" /> to write the compressed archive to.</param>
/// <param name="leaveOpen">A <see cref="bool" /> value indicating whether to leave <paramref name="stream" /> open.</param>
public static void Compress(BlobTree blobs, Stream stream, bool leaveOpen)
{
Check.ArgumentNull(blobs, nameof(blobs));
Check.ArgumentNull(stream, nameof(stream));
using ZipArchive archive = new ZipArchive(stream, ZipArchiveMode.Create, leaveOpen);
CreateEntries("", blobs.Root);
void CreateEntries(string path, BlobTreeNode node)
{
foreach (BlobTreeNode childNode in node.Nodes)
{
CreateEntries(Path.Combine(path, childNode.Name), childNode);
}
foreach (Blob blob in node.Blobs)
{
archive.CreateEntry(Path.Combine(path, blob.Name), blob.Content);
}
}
}
public static CsvData ImportFromCloud()
{
CsvData csvData = new CsvData();
BlobTree countryBlob = ZipCompression.Decompress(HttpClient.Default.CreateGetRequest("https://geolite.maxmind.com/download/geoip/database/GeoLite2-Country-CSV.zip").ReadBytes());
BlobTree asnBlob = ZipCompression.Decompress(HttpClient.Default.CreateGetRequest("https://geolite.maxmind.com/download/geoip/database/GeoLite2-ASN-CSV.zip").ReadBytes());
BlobTree cityBlob = ZipCompression.Decompress(HttpClient.Default.CreateGetRequest("https://geolite.maxmind.com/download/geoip/database/GeoLite2-City-CSV.zip").ReadBytes());
csvData.Country = FindBlob(countryBlob, "GeoLite2-Country-Locations-en.csv");
csvData.Range = FindBlob(countryBlob, "GeoLite2-Country-Blocks-IPv4.csv");
csvData.Range6 = FindBlob(countryBlob, "GeoLite2-Country-Blocks-IPv6.csv");
csvData.Asn = FindBlob(asnBlob, "GeoLite2-ASN-Blocks-IPv4.csv");
csvData.Asn6 = FindBlob(asnBlob, "GeoLite2-ASN-Blocks-IPv6.csv");
csvData.City = FindBlob(cityBlob, "GeoLite2-City-Locations-en.csv");
csvData.CityRange = FindBlob(cityBlob, "GeoLite2-City-Blocks-IPv4.csv");
csvData.CityRange6 = FindBlob(cityBlob, "GeoLite2-City-Blocks-IPv6.csv");
return(csvData);
byte[] FindBlob(BlobTree blobs, string name)
{
return(blobs.Root.Nodes.First().Blobs[name].Content);
}
}
/// <summary>
/// Creates a ZIP archive from the specified <see cref="BlobTree" /> and writes the compressed archive to <paramref name="stream" />.
/// </summary>
/// <param name="blobs">A tree of <see cref="Blob" /> objects to create the ZIP archive from.</param>
/// <param name="stream">The <see cref="Stream" /> to write the compressed archive to.</param>
public static void Compress(BlobTree blobs, Stream stream)
{
Compress(blobs, stream, false);
}
