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Initial commit: FunASR Speech Recognition Toolkit
Update API Documentation / build-api-docs (push) Has been cancelled
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Add complete FunASR codebase including models, runtime, and documentation.
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freedakgmail
2026-07-09 22:38:58 +08:00
commit 6116b1f3c6
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runtime/csharp/AliParaformerAsr/AliParaformerAsr.Examples.MauiApp/Utils/DownloadHelper.cs
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using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Net;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Input;
using System.Security.Cryptography;
namespace MauiApp1.Utils
{
public enum DownloadState
{
cancelled = 0, // 取消
inprogres = 1, //进行中
completed = 2, //完成
error = 3, //错误
existed = 4,//已存在
noexisted = 5,//已存在
}
public delegate void DelegateDone(int progress, DownloadState downloadState,string filename, string msg = "");
internal class DownloadHelper : INotifyPropertyChanged
{
private DelegateDone _callback;
private bool _isDownloading = false;
private int _progress;
private string _fileName;
private object _lockobj = new object();
private WebClient _webClient;
private ICommand DownloadCommand { get; set; }
public bool IsDownloading
{
get => _isDownloading;
set
{
if (value != _isDownloading)
{
_isDownloading = value;
NotifyPropertyChanged("IsDownloading");
}
}
}
public string FileName
{
get => _fileName;
set
{
if (value != _fileName)
{
_fileName = value;
NotifyPropertyChanged("FileName");
}
}
}
public event PropertyChangedEventHandler? PropertyChanged;
protected void NotifyPropertyChanged(string property)
{
if (PropertyChanged != null)
{
PropertyChanged(this, new PropertyChangedEventArgs(property));
}
}
public DownloadHelper()
{
}
public DownloadHelper(DelegateDone callback)
{
_callback = callback;
}
public void DownloadCreate(string downloadUrl, string fileName, string rootFolderName, string subFolderName)
{
lock (_lockobj)
{
//IsDownloading = true;
FileName = fileName;
var downloadFolder = Path.Combine(SysConf.ApplicationBase, rootFolderName);
var modelFolder = Path.Combine(downloadFolder, subFolderName);
Directory.CreateDirectory(downloadFolder);
Directory.CreateDirectory(modelFolder);
string fileFullname = Path.Combine(modelFolder, fileName);
if (!File.Exists(fileFullname))
{
_webClient = new WebClient();
_webClient.Headers.Add("User-Agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/116.0.0.0 Safari/537.36");
_webClient.DownloadFileCompleted += OnDownloadCompleted;
_webClient.DownloadProgressChanged += OnDownloadProgressChanged;
DownloadCommand = new Command(() =>
{
if (!IsDownloading)
{
IsDownloading = true;
_webClient.DownloadFileAsync(new Uri(downloadUrl), fileFullname);
}
});
}
else
{
DownloadCommand = null;
if (_callback != null)
{
_callback(100, DownloadState.existed, FileName);
}
}
}
}
public void DownloadStart()
{
if (DownloadCommand != null && DownloadCommand.CanExecute(null))
{
DownloadCommand.Execute(null);
}
}
public void DownloadCancel()
{
if (_webClient != null)
{
_webClient.CancelAsync();
}
}
public bool GetDownloadState(string[] fileNames, string rootFolderName, string subFolderName, string[] md5Strs)
{
bool state=true;
var downloadFolder = Path.Combine(SysConf.ApplicationBase, rootFolderName);
var modelFolder = Path.Combine(downloadFolder, subFolderName);
Directory.CreateDirectory(downloadFolder);
Directory.CreateDirectory(modelFolder);
for (int i = 0; i < fileNames.Length; i++)
{
string fileFullname = Path.Combine(modelFolder, fileNames[i]);
if (File.Exists(fileFullname))
{
FileInfo fileInfo = new FileInfo(fileFullname);
if (fileInfo.Length == 0)
{
state = state && false;
}
else
{
string md5str = GetMD5Hash(fileFullname);
if (!md5str.Equals(md5Strs[i]))
{
state = state && false;
}
}
}
else
{
state = state && false;
}
}
return state;
}
public void DownloadCheck(string fileName, string rootFolderName, string subFolderName,string md5Str)
{
var downloadFolder = Path.Combine(SysConf.ApplicationBase, rootFolderName);
var modelFolder = Path.Combine(downloadFolder, subFolderName);
Directory.CreateDirectory(downloadFolder);
Directory.CreateDirectory(modelFolder);
string fileFullname = Path.Combine(modelFolder, fileName);
if (File.Exists(fileFullname))
{
FileInfo fileInfo = new FileInfo(fileFullname);
if (fileInfo.Length == 0)
{
File.Delete(fileFullname);
string filename = fileInfo.Name;
_callback(0, DownloadState.noexisted, filename);
}
else
{
string md5str = GetMD5Hash(fileFullname);
if (!md5str.Equals(md5Str))
{
File.Delete(fileFullname);
string filename = fileInfo.Name;
_callback(0, DownloadState.noexisted, filename);
}
}
}
else
{
string filename = fileName;
_callback(0, DownloadState.noexisted, filename);
}
}
private void OnDownloadProgressChanged(object? sender, DownloadProgressChangedEventArgs e)
{
string filename = FileName;
_progress = (int)(e.BytesReceived * 100 / e.TotalBytesToReceive);
if (_callback != null)
{
_callback(_progress, DownloadState.inprogres, filename);
}
}
private void OnDownloadCompleted(object? sender, AsyncCompletedEventArgs e)
{
string filename = FileName;
IsDownloading = false;
if (_callback != null)
{
if (e.Cancelled)
{
_callback(_progress, DownloadState.cancelled, filename);
}
else if (e.Error != null)
{
_callback(_progress, DownloadState.error,filename, msg: e.Error.Message);
}
else
{
_callback(_progress, DownloadState.completed, filename);
}
}
}
public string GetMD5Hash(string path)
{
using (FileStream fs = new FileStream(path, FileMode.Open))
{
StringBuilder sb = new StringBuilder();
MD5 md5 = MD5.Create();
byte[] array = md5.ComputeHash(fs);
fs.Close();
for (int i = 0; i < array.Length; i++)
{
sb.Append(array[i].ToString("x2"));
}
return sb.ToString();
}
}
}
}