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{ LinkStatus, type CheckResult } from \"../types.ts\";\n\nconst MOBILE_UA = \"Mozilla/5.0 (iPhone; CPU iPhone OS 16_6 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/16.6 Mobile/15E148 Safari/604.1\";\nconst SPIDER_UA = \"Mozilla/5.0 (compatible; Baiduspider/2.0; +http://www.baidu.com/search/spider.html)\";\n\n/**\n * 抖音专有检测逻辑\n */\nexport async function checkDouyin(shareUrl: string, timeout: number): Promise {\n const maxRetries = 2;\n let lastResult: CheckResult | null = null;\n\n for (let attempt = 1; attempt <= maxRetries; attempt++) {\n lastResult = await doCheckDouyin(shareUrl, timeout);\n if (lastResult.status !== LinkStatus.Error) {\n return lastResult;\n }\n if (attempt < maxRetries) {\n await new Promise(resolve => setTimeout(resolve, 1000 * attempt));\n }\n }\n return lastResult!;\n}\n\nasync function doCheckDouyin(shareUrl: string, timeout: number): Promise {\n try {\n // 1. 提取视频/图文 ID\n const videoId = await extractVideoId(shareUrl, timeout, MOBILE_UA);\n if (!videoId) {\n return {\n status: LinkStatus.Invalid,\n http_code: 200,\n reason: \"内容不存在或链接已失效\",\n title: \"\"\n };\n }\n\n // 2. 请求抖音 slidesinfo 详情接口\n const apiUrl = `https://www.iesdouyin.com/web/api/v2/aweme/slidesinfo/?aweme_ids=%5B${videoId}%5D`;\n const controller = new AbortController();\n const timer = setTimeout(() => controller.abort(), timeout * 1000);\n\n let apiSuccess = false;\n let filterReasonText = \"\";\n\n try {\n const apiRes = await fetch(apiUrl, {\n method: \"GET\",\n headers: {\n \"User-Agent\": MOBILE_UA,\n \"Referer\": `https://www.iesdouyin.com/share/video/${videoId}`,\n \"Accept\": \"application/json, text/plain, */*\"\n },\n signal: controller.signal\n });\n clearTimeout(timer);\n\n if (apiRes.ok) {\n const apiData: any = await apiRes.json();\n apiSuccess = true;\n\n // 2.1 检查视频详情\n if (apiData.aweme_details && apiData.aweme_details.length > 0) {\n const item = apiData.aweme_details[0];\n const itemStatus = item.status;\n\n if (itemStatus) {\n if (itemStatus.is_delete) {\n return { status: LinkStatus.Invalid, http_code: 200, reason: \"视频已被删除\", title: \"\" };\n }\n if (itemStatus.is_prohibited) {\n return { status: LinkStatus.Invalid, http_code: 200, reason: \"视频已被封禁或下架\", title: \"\" };\n }\n if (itemStatus.is_private) {\n return { status: LinkStatus.Invalid, http_code: 200, reason: \"视频已被设为私密\", title: \"\" };\n }\n }\n\n const title = item.desc || (item.share_info && item.share_info.share_title) || \"\";\n return { status: LinkStatus.Valid, http_code: 200, reason: \"OK\", title };\n }\n\n // 2.2 记录过滤列表原因（注意：note 图文在 slidesinfo 接口中常被返回 reason:8，需经第3步爬虫页二次验证）\n if (apiData.filter_list && apiData.filter_list.length > 0) {\n const filter = apiData.filter_list[0];\n if (filter.reason === 1) filterReasonText = \"内容审核中或未通过\";\n else if (filter.reason === 2) filterReasonText = \"内容仅自己可见\";\n else if (filter.reason === 8) filterReasonText = \"内容不存在或已删除\";\n else if (filter.reason === 10) filterReasonText = \"内容已被作者删除\";\n else if (filter.reason === 12) filterReasonText = \"内容已被封禁\";\n else if (filter.filter_reason || filter.detail_msg) {\n filterReasonText = ((filter.filter_reason || \"\") + \" \" + (filter.detail_msg || \"\")).trim();\n }\n }\n }\n } catch (e) {\n clearTimeout(timer);\n }\n\n // 3. 兜底与二次验证方案：使用爬虫 UA 访问分享页\n const spiderController = new AbortController();\n const spiderTimer = setTimeout(() => spiderController.abort(), timeout * 1000);\n try {\n const reqUrl = `https://www.iesdouyin.com/share/video/${videoId}`;\n const spiderRes = await fetch(reqUrl, {\n method: \"GET\",\n headers: { \"User-Agent\": SPIDER_UA },\n signal: spiderController.signal\n });\n clearTimeout(spiderTimer);\n\n const html = await spiderRes.text();\n if (html.includes(\"视频不存在\") || html.includes(\"该视频已被删除\") || html.includes(\"该图文已被删除\") || html.includes(\"参数错误\")) {\n return { status: LinkStatus.Invalid, http_code: spiderRes.status, reason: \"内容不存在或已删除\", title: \"\" };\n }\n\n const descMatch = html.match(/]+name=\"description\"[^>]+content=\"([^\"]*)\"/i);\n if (descMatch && descMatch[1]) {\n const desc = descMatch[1].trim();\n if (desc && desc.includes(\"发布在抖音\")) {\n // 清洗后缀，例如 \" - 用户名于20260830发布在抖音...\"\n const cleanTitle = desc.replace(/\\s*-\\s*[^-\\n]+于\\d{8}发布在抖音.*$/, \"\").trim();\n return { status: LinkStatus.Valid, http_code: spiderRes.status, reason: \"OK\", title: cleanTitle || desc };\n }\n }\n\n const titleMatch = html.match(/]*>([^<]+)<\\/title>/i);\n if (titleMatch && titleMatch[1]) {\n const title = titleMatch[1].trim();\n if (title && title !== \"抖音\" && title !== \"None\") {\n const cleanTitle = title.replace(/\\s*-\\s*抖音$/, \"\").trim();\n if (cleanTitle) {\n return { status: LinkStatus.Valid, http_code: spiderRes.status, reason: \"OK\", title: cleanTitle };\n }\n }\n }\n } catch (e) {\n clearTimeout(spiderTimer);\n }\n\n if (apiSuccess) {\n return { status: LinkStatus.Invalid, http_code: 200, reason: filterReasonText || \"内容不存在或已删除\", title: \"\" };\n }\n\n return { status: LinkStatus.Error, http_code: 0, reason: \"检测失败，接口无响应\", title: \"\" };\n } catch (err: any) {\n return { status: LinkStatus.Error, http_code: 0, reason: \"检测过程异常: \" + err.message, title: \"\" };\n }\n}\n\n/**\n * 提取视频/图文 ID\n */\nasync function extractVideoId(shareUrl: string, timeout: number, ua: string): Promise {\n if (!shareUrl.includes(\"v.douyin.com\")) {\n return parseIdFromPath(shareUrl);\n }\n\n const controller = new AbortController();\n const id = setTimeout(() => controller.abort(), timeout * 1000);\n\n try {\n const res = await fetch(shareUrl, {\n method: \"GET\",\n headers: { \"User-Agent\": ua },\n redirect: \"manual\",\n signal: controller.signal\n });\n clearTimeout(id);\n\n const location = res.headers.get(\"location\");\n if (location) {\n if (location === \"https://www.douyin.com\" || location === \"https://www.douyin.com/\" || location.startsWith(\"https://www.douyin.com/?\")) {\n return null;\n }\n return parseIdFromPath(location);\n }\n\n 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Diff · v15