218 lines
9.1 KiB
C#
218 lines
9.1 KiB
C#
using dy.net.model.dto;
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using dy.net.utils;
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using Newtonsoft.Json;
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namespace dy.net.service
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{
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public sealed class DouyinUserSearchClient
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{
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private const string SearchPath = "/aweme/v1/web/discover/search/";
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private readonly IHttpClientFactory _clientFactory;
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private readonly DouyinABogusSigner _signer = new();
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public DouyinUserSearchClient(IHttpClientFactory clientFactory) => _clientFactory = clientFactory;
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public async Task<List<DouyinFollowCandidate>> SearchAsync(
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string douyinNo,
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string cookie,
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CancellationToken cancellationToken = default)
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{
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var parameters = BuildParameters(douyinNo, cookie);
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var unsignedQuery = BuildQueryString(parameters);
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var signature = _signer.Sign(unsignedQuery);
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var requestUri = SearchPath + "?" + unsignedQuery + "&a_bogus=" + Encode(signature);
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using var request = new HttpRequestMessage(HttpMethod.Get, requestUri);
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request.Headers.Referrer = new Uri("https://www.douyin.com/root/search/" + Encode(douyinNo) + "?type=user");
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request.Headers.TryAddWithoutValidation("Accept", "*/*");
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request.Headers.TryAddWithoutValidation("Cookie", cookie);
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var client = _clientFactory.CreateClient(DouyinRequestParamManager.DY_HTTP_CLIENT);
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try
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{
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using var response = await client.SendAsync(
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request,
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HttpCompletionOption.ResponseHeadersRead,
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cancellationToken);
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if (!response.IsSuccessStatusCode)
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throw new InvalidOperationException($"抖音用户搜索请求失败（HTTP {(int)response.StatusCode}）");
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var content = await response.Content.ReadAsStringAsync(cancellationToken);
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SearchResponse payload;
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try
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{
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payload = JsonConvert.DeserializeObject<SearchResponse>(content);
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}
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catch (JsonException)
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{
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throw new InvalidOperationException("抖音返回了风控验证页面，请稍后重试或使用手动添加");
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}
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if (payload == null)
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throw new InvalidOperationException("抖音用户搜索没有返回有效数据");
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if (payload.StatusCode != 0)
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throw new InvalidOperationException("抖音用户搜索被拒绝，请确认 Cookie 有效后重试");
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return (payload.Users ?? new List<SearchUserEntry>())
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.Select(x => x.User)
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.Where(x => x != null &&
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!string.IsNullOrWhiteSpace(x.SecUid) &&
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!string.IsNullOrWhiteSpace(x.Uid) &&
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!string.IsNullOrWhiteSpace(x.Nickname))
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.Select(x => new DouyinFollowCandidate
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{
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SecUid = x.SecUid,
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UperId = x.Uid,
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UniqueId = x.UniqueId,
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ShortId = x.ShortId,
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DouyinNo = !string.IsNullOrWhiteSpace(x.UniqueId) ? x.UniqueId : x.ShortId,
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UperName = x.Nickname,
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UperAvatar = x.Avatar?.Urls?.FirstOrDefault() ?? string.Empty,
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Signature = x.Signature,
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Enterprise = !string.IsNullOrWhiteSpace(x.Enterprise) ? x.Enterprise : x.CustomVerify,
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FollowerCount = x.FollowerCount
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})
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.GroupBy(x => x.SecUid, StringComparer.Ordinal)
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.Select(x => x.First())
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.Take(10)
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.ToList();
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}
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catch (HttpRequestException)
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{
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// 不向上抛出包含查询 URI 的原始异常，避免 msToken 出现在全局日志中。
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throw new InvalidOperationException("抖音用户搜索网络请求失败，请稍后重试");
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}
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catch (OperationCanceledException) when (!cancellationToken.IsCancellationRequested)
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{
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throw new InvalidOperationException("抖音用户搜索超时，请稍后重试");
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}
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}
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private static List<KeyValuePair<string, string>> BuildParameters(string douyinNo, string cookie)
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{
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var cookies = ParseCookie(cookie);
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return new List<KeyValuePair<string, string>>
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{
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new("device_platform", "webapp"),
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new("aid", "6383"),
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new("channel", "channel_pc_web"),
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new("update_version_code", "170400"),
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new("pc_client_type", "1"),
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new("pc_libra_divert", "Windows"),
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new("support_h265", "1"),
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new("support_dash", "1"),
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new("version_code", "170400"),
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new("version_name", "17.4.0"),
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new("cookie_enabled", "true"),
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new("screen_width", "1536"),
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new("screen_height", "864"),
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new("browser_language", "zh-CN"),
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new("browser_platform", "Win32"),
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new("browser_name", "Chrome"),
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new("browser_version", "119.0.0.0"),
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new("browser_online", "true"),
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new("engine_name", "Blink"),
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new("engine_version", "119.0.0.0"),
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new("os_name", "Windows"),
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new("os_version", "10"),
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new("cpu_core_num", "16"),
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new("device_memory", "8"),
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new("platform", "PC"),
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new("downlink", "10"),
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new("effective_type", "4g"),
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new("round_trip_time", "200"),
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new("uifid", CookieValue(cookies, "UIFID", "UIFID_TEMP")),
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new("msToken", CookieValue(cookies, "msToken")),
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new("pc_search_top_1_params", "{\"enable_ai_search_top_1\":1}"),
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new("search_channel", "aweme_user_web"),
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new("keyword", douyinNo),
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new("search_source", "switch_tab"),
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new("query_correct_type", "1"),
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new("is_filter_search", "0"),
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new("from_group_id", string.Empty),
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new("disable_rs", "0"),
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new("offset", "0"),
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new("count", "10"),
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new("need_filter_settings", "0"),
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new("list_type", "single")
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};
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}
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private static Dictionary<string, string> ParseCookie(string cookie)
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{
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var values = new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase);
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foreach (var part in (cookie ?? string.Empty).Split(';', StringSplitOptions.RemoveEmptyEntries))
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{
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var separator = part.IndexOf('=');
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if (separator <= 0) continue;
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values[part[..separator].Trim()] = part[(separator + 1)..].Trim();
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}
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return values;
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}
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private static string CookieValue(Dictionary<string, string> cookies, params string[] names)
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{
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foreach (var name in names)
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if (cookies.TryGetValue(name, out var value)) return value;
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return string.Empty;
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}
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private static string BuildQueryString(IEnumerable<KeyValuePair<string, string>> parameters) =>
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string.Join("&", parameters.Select(x => Encode(x.Key) + "=" + Encode(x.Value ?? string.Empty)));
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private static string Encode(string value) => Uri.EscapeDataString(value ?? string.Empty);
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private sealed class SearchResponse
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{
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[JsonProperty("status_code")]
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public int StatusCode { get; set; }
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[JsonProperty("user_list")]
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public List<SearchUserEntry> Users { get; set; }
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}
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private sealed class SearchUserEntry
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{
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[JsonProperty("user_info")]
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public SearchUser User { get; set; }
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}
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private sealed class SearchUser
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{
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[JsonProperty("sec_uid")]
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public string SecUid { get; set; }
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[JsonProperty("uid")]
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public string Uid { get; set; }
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[JsonProperty("unique_id")]
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public string UniqueId { get; set; }
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[JsonProperty("short_id")]
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public string ShortId { get; set; }
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[JsonProperty("nickname")]
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public string Nickname { get; set; }
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[JsonProperty("signature")]
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public string Signature { get; set; }
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[JsonProperty("enterprise_verify_reason")]
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public string Enterprise { get; set; }
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[JsonProperty("custom_verify")]
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public string CustomVerify { get; set; }
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[JsonProperty("follower_count")]
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public long FollowerCount { get; set; }
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[JsonProperty("avatar_thumb")]
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public SearchAvatar Avatar { get; set; }
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}
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private sealed class SearchAvatar
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{
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[JsonProperty("url_list")]
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public List<string> Urls { get; set; }
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}
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}
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}
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