43 lines
1.8 KiB
C#
43 lines
1.8 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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namespace dy.image
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{
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public class DownloadHelper
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{
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private readonly HttpClient _httpClient;
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public DownloadHelper(HttpClient httpClient)
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{
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_httpClient = httpClient;
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_httpClient.Timeout = TimeSpan.FromSeconds(60); // 下载超时30秒
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_httpClient.DefaultRequestHeaders.Add("Accept-Language", "zh-CN,zh;q=0.8,zh-TW;q=0.7,zh-HK;q=0.5,en-US;q=0.3,en;q=0.2");
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_httpClient.DefaultRequestHeaders.Add("User-Agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Safari/537.36");
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_httpClient.DefaultRequestHeaders.Add("Referer", "https://www.douyin.com");
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}
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/// <summary>下载网络文件到指定路径</summary>
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public async Task DownloadFileAsync(string url, string savePath)
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{
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if (string.IsNullOrEmpty(url)) throw new ArgumentNullException(nameof(url));
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if (string.IsNullOrEmpty(savePath)) throw new ArgumentNullException(nameof(savePath));
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// 创建目录（如果不存在）
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var directory = Path.GetDirectoryName(savePath)!;
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if (!Directory.Exists(directory)) Directory.CreateDirectory(directory);
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// 下载文件
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using var response = await _httpClient.GetAsync(url, HttpCompletionOption.ResponseHeadersRead);
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response.EnsureSuccessStatusCode(); // 非2xx状态码抛出异常
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using var stream = await response.Content.ReadAsStreamAsync();
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using var fileStream = new FileStream(savePath, FileMode.Create, FileAccess.Write, FileShare.None, 8192, true);
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await stream.CopyToAsync(fileStream);
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}
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}
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}
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