/// <summary>
/// 异步解压缩
/// </summary>
/// <param name="strFilePath"></param>
/// <param name="strUnpackDir"></param>
/// <returns></returns>
public async static Task <bool> UnGzipAsync(string strFilePath, string strUnpackDir)
{
if (!File.Exists(strFilePath))
{
return(false);
}
strUnpackDir = strUnpackDir.Replace("/", "\\");
if (!strUnpackDir.EndsWith("\\"))
{
strUnpackDir += "\\";
}
if (!Directory.Exists(strUnpackDir))
{
Directory.CreateDirectory(strUnpackDir);
}
try
{
byte[] cbytes = await ReadFileToBytesAsync(strFilePath);
using (FileStream streamWriter = File.Create(strUnpackDir + "\\11.json"))
{
using (MemoryStream cms = new MemoryStream(cbytes))
{
using (System.IO.Compression.GZipStream gzip = new System.IO.Compression.GZipStream(cms, System.IO.Compression.CompressionMode.Decompress))
{
byte[] bytes = new byte[1024];
int len = 0;
//读取压缩流，同时会被解压
while ((len = await gzip.ReadAsync(bytes, 0, bytes.Length)) > 0)
{
await streamWriter.WriteAsync(bytes, 0, len);
}
}
}
}
}
catch (Exception)
{
return(false);
}
return(true);
}
public static async Task <byte[]> DownloadData(this HttpClient client, string address, bool handleGzip)
{
if (!handleGzip)
{
return(await client.GetByteArrayAsync(address));
}
var result = await client.GetByteArrayAsync(address);
if (result != null && result.Length > 3 && result[0] == GZipStarter[0] && result[1] == GZipStarter[1] && result[2] == GZipStarter[2])
{
// GZIP:
using (var stream = new System.IO.Compression.GZipStream(new MemoryStream(result), System.IO.Compression.CompressionMode.Decompress))
{
var buffer = new byte[4096];
using (var memory = new MemoryStream())
{
while (true)
{
var count = await stream.ReadAsync(buffer, 0, buffer.Length);
if (count > 0)
{
await memory.WriteAsync(buffer, 0, count);
}
else
{
break;
}
}
return(memory.ToArray());
}
}
}
else
{
return(result);
}
}