oxedyne/fe2o3 — fe2o3_text/tests/detect_corpus/csharp/async

1.6 KiB, 1 run

created by r1870400018:11958, which is this file's identity for as long as the history lasts, whatever it is later renamed to

1	using System;
2	using System.Collections.Generic;
3	using System.Net.Http;
4	using System.Threading.Tasks;
5
6	namespace Annealer.Examples
7	{
8	public class Fetcher
9	{
10	private readonly HttpClient _client = new();
11	private readonly Dictionary<string, string> _cache = new();
12
13	public async Task<string> GetAsync(string url)
14	{
15	if (_cache.TryGetValue(url, out var cached))
16	return cached;
17
18	var response = await _client.GetAsync(url);
19	response.EnsureSuccessStatusCode();
20	var body = await response.Content.ReadAsStringAsync();
21	_cache[url] = body;
22	return body;
23	}
24
25	public async Task<List<string>> GetAllAsync(IEnumerable<string> urls)
26	{
27	var tasks = new List<Task<string>>();
28	foreach (var url in urls)
29	{
30	tasks.Add(GetAsync(url));
31	}
32	var results = await Task.WhenAll(tasks);
33	return new List<string>(results);
34	}
35
36	public async Task<string?> TryGetAsync(string url, int retries = 3)
37	{
38	for (int attempt = 1; attempt <= retries; attempt++)
39	{
40	try
41	{
42	return await GetAsync(url);
43	}
44	catch (HttpRequestException)
45	{
46	if (attempt == retries)
47	return null;
48	await Task.Delay(TimeSpan.FromSeconds(Math.Pow(2, attempt)));
49	}
50	}
51	return null;
52	}
53	}
54	}