public void MultiPartFileShouldBeDecoded()
{
const string expectedFileName = "joystick.jpg";
byte[] expected = testData.GetEmbeddedFile(@"yenc.multipart.joystick.jpg").ReadAllBytes();
YencStream part1 = YencStreamDecoder.Decode(
testData.GetEmbeddedFile(@"yenc.multipart.00000020.ntx").ReadAllLines(UsenetEncoding.Default));
YencStream part2 = YencStreamDecoder.Decode(
testData.GetEmbeddedFile(@"yenc.multipart.00000021.ntx").ReadAllLines(UsenetEncoding.Default));
using (var actual = new MemoryStream())
{
actual.Seek(part1.Header.PartOffset, SeekOrigin.Begin);
part1.CopyTo(actual);
actual.Seek(part2.Header.PartOffset, SeekOrigin.Begin);
part2.CopyTo(actual);
string actualFileName = part1.Header.FileName;
Assert.Equal(expectedFileName, actualFileName);
Assert.Equal(expected, actual.ToArray());
}
}
public void FilePartShouldBeDecoded()
{
const int expectedDataLength = 11250;
YencStream actualStream = YencStreamDecoder.Decode(
testData.GetEmbeddedFile(@"yenc.multipart.00000020.ntx").ReadAllLines(UsenetEncoding.Default));
byte[] actualData = actualStream.ReadAllBytes();
Assert.True(actualStream.Header.IsFilePart);
Assert.Equal(expectedDataLength, actualData.Length);
}
private static void TestDownloadNzbStreaming(NntpClient client, string nzbFileName)
{
string fullPath = Path.Combine(nzbFileName);
string nzbData = File.ReadAllText(fullPath, UsenetEncoding.Default);
NzbDocument nzbDocument = NzbParser.Parse(nzbData);
string downloadDir = Path.Combine("downloads", nzbFileName);
Directory.CreateDirectory(downloadDir);
var sw = new Stopwatch();
sw.Restart();
log.LogInformation("Downloading nzb {nzbFileName}", nzbFileName);
foreach (NzbFile file in nzbDocument.Files)
{
log.LogInformation("Downloading file {subject}", file.Subject);
foreach (NzbSegment segment in file.Segments)
{
log.LogInformation("Downloading article {messageId}", segment.MessageId);
NntpArticleResponse response = client.Article(segment.MessageId);
using (YencStream yencStream = YencStreamDecoder.Decode(response.Article.Body))
{
YencHeader header = yencStream.Header;
string fileName = Path.Combine(downloadDir, header.FileName);
if (!File.Exists(fileName))
{
log.LogInformation("Creating file {fileName}", fileName);
// create file and pre-allocate disk space for it
using (FileStream stream = File.Create(fileName))
{
stream.SetLength(header.FileSize);
}
}
log.LogInformation("Writing {size} bytes to file {fileName} at offset {offset}",
header.PartSize, fileName, header.PartOffset);
using (FileStream stream = File.Open(
fileName, FileMode.OpenOrCreate, FileAccess.Write, FileShare.ReadWrite))
{
stream.Seek(header.PartOffset, SeekOrigin.Begin);
yencStream.CopyTo(stream);
}
}
}
}
log.LogInformation("Nzb downloaded in {elapsed}", sw.Elapsed);
}
public void SinglePartFileShouldBeDecoded()
{
byte[] expectedData = testData.GetEmbeddedFile(@"yenc.singlepart.testfile.txt").ReadAllBytes();
YencStream actualStream = YencStreamDecoder.Decode(
testData.GetEmbeddedFile(@"yenc.singlepart.00000005.ntx").ReadAllLines(UsenetEncoding.Default));
byte[] actualData = actualStream.ReadAllBytes();
Assert.False(actualStream.Header.IsFilePart);
Assert.Equal(128, actualStream.Header.LineLength);
Assert.Equal(584, actualStream.Header.FileSize);
Assert.Equal("testfile.txt", actualStream.Header.FileName);
Assert.Equal(584, actualData.Length);
Assert.Equal(expectedData, actualData);
}
