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Use original file names for downloaded media

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Closes #327
This commit is contained in:
Alexey Golub 2020-07-19 14:19:40 +03:00
parent e58c7aefff
commit 1f20915b4d
1 changed files with 17 additions and 11 deletions
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28
DiscordChatExporter.Domain/Exporting/MediaDownloader.cs
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@ -9,38 +9,44 @@ using DiscordChatExporter.Domain.Internal.Extensions;
namespace DiscordChatExporter.Domain.Exporting
{
internal partial class MediaDownloader
internal class MediaDownloader
{
private readonly HttpClient _httpClient = Singleton.HttpClient;
private readonly string _workingDirPath;
private readonly Dictionary<string, string> _mediaPathMap = new Dictionary<string, string>();
private readonly Dictionary<string, string> _pathMap = new Dictionary<string, string>();
public MediaDownloader(string workingDirPath)
{
_workingDirPath = workingDirPath;
}
private string GetRandomSuffix() => Guid.NewGuid().ToString().Replace("-", "").Substring(0, 8);
private string GetFileNameFromUrl(string url)
{
var originalFileName = Regex.Match(url, @".+/([^?]*)").Groups[1].Value;
if (string.IsNullOrWhiteSpace(originalFileName))
return GetRandomSuffix();
return $"{Path.GetFileNameWithoutExtension(originalFileName)}-{GetRandomSuffix()}{Path.GetExtension(originalFileName)}";
}
// HACK: ConfigureAwait() is crucial here to enable sync-over-async in HtmlMessageWriter
public async ValueTask<string> DownloadAsync(string url)
{
if (_mediaPathMap.TryGetValue(url, out var cachedFilePath))
if (_pathMap.TryGetValue(url, out var cachedFilePath))
return cachedFilePath;
var extension = Path.GetExtension(GetFileNameFromUrl(url));
var fileName = $"{Guid.NewGuid()}{extension}";
var fileName = GetFileNameFromUrl(url);
var filePath = Path.Combine(_workingDirPath, fileName);
Directory.CreateDirectory(_workingDirPath);
await _httpClient.DownloadAsync(url, filePath).ConfigureAwait(false);
return _mediaPathMap[url] = filePath;
return _pathMap[url] = filePath;
}
}
internal partial class MediaDownloader
{
private static string GetFileNameFromUrl(string url) => Regex.Match(url, @".+/([^?]*)").Groups[1].Value;
}
}