diff --git a/scripts/test-lanzou.mts b/scripts/test-lanzou.mts index 2dc3b9f4..e5f0edf9 100644 --- a/scripts/test-lanzou.mts +++ b/scripts/test-lanzou.mts @@ -120,7 +120,7 @@ await test("Lanzou Driver get() 直链与请求头验证（纯 User-Agent，无 try { (globalThis as any).fetch = async (url: string, init?: RequestInit) => { const urlStr = String(url) - if (urlStr.includes("ajaxm.php")) { + if (urlStr.includes("ajaxfile.php") || urlStr.includes("ajaxm.php")) { return new Response(JSON.stringify({ zt: 1, dom: "https://developer.lanzoui.com", @@ -161,6 +161,156 @@ await test("Lanzou Driver get() 直链与请求头验证（纯 User-Agent，无 } }) +// 5. Test 2026-10 改版 /fn 内页（apifile 绝对地址 + 签名） +await test("Lanzou Driver get() 适配改版 /fn 内页（apifile 绝对地址）", async () => { + const driver = new LanzouDriver({ + type: "url", + root_folder_id: "b00test", + shareUrl: "https://pan.lanzoui.com", + }) + + const mockFilePage = ` + + sample.zip - 蓝奏云 +
大小：10.5 M
+ + + ` + // 改版后：下载接口是 apifile 绝对地址，签名放在 wp_sign / ajaxdata + const mockIframe = ` + + + + ` + + let posted: { url: string; form: URLSearchParams } | null = null + const originalFetch = globalThis.fetch + try { + (globalThis as any).fetch = async (url: string, init: RequestInit = {}) => { + const urlStr = String(url) + const method = (init.method || "GET").toUpperCase() + if (urlStr.includes("/fn?")) return new Response(mockIframe) + if (method === "POST") { + posted = { + url: urlStr, + form: new URLSearchParams(String(init.body || "")), + } + return new Response( + JSON.stringify({ + zt: 1, + dom: "https://developer.lanzoui.com", + url: "token_new", + }), + ) + } + if (urlStr.includes("developer.lanzoui.com/file")) { + return new Response(null, { + status: 302, + headers: { location: "https://cdn.example.com/new.zip" }, + }) + } + if (urlStr.includes("pan.lanzoui.com/b00test")) { + return new Response(mockFilePage) + } + return new Response("Not Found", { status: 404 }) + } + + const item = await driver.get("/b00test", "/sample.zip") + const got = posted as { url: string; form: URLSearchParams } | null + if (!got) throw new Error("下载接口未被调用") + if (!got.url.startsWith("https://apifile.woozooo.com/ajaxfile.php?file=987654")) { + throw new Error(`下载接口地址错误: ${got.url}`) + } + if (got.form.get("sign") !== "NEWSIGN") throw new Error("sign 未透传") + if (got.form.get("signs") !== "NEWDATA") throw new Error("signs 未透传") + if (got.form.get("kd") !== "1") throw new Error("kd 未按改版结构传 1") + if (item.raw_url !== "https://cdn.example.com/new.zip") { + throw new Error(`直链错误: ${item.raw_url}`) + } + } finally { + globalThis.fetch = originalFetch + } +}) + +// 6. 旧版 /fn 内页回归：确认改版适配没有破坏原有结构 +await test("Lanzou Driver get() 保持旧版 /fn 内页兼容性", async () => { + const driver = new LanzouDriver({ + type: "url", + root_folder_id: "b00test", + shareUrl: "https://pan.lanzoui.com", + }) + + const mockFilePage = ` + + legacy.zip - 蓝奏云 +
大小：1.2 M
+ + + ` + // 旧版：相对路径 + data 对象（改版前一直用的结构） + const mockIframe = ` + + + + ` + + let posted: { url: string; form: URLSearchParams } | null = null + const originalFetch = globalThis.fetch + try { + (globalThis as any).fetch = async (url: string, init: RequestInit = {}) => { + const urlStr = String(url) + const method = (init.method || "GET").toUpperCase() + if (urlStr.includes("/fn?")) return new Response(mockIframe) + if (method === "POST") { + posted = { url: urlStr, form: new URLSearchParams(String(init.body || "")) } + return new Response( + JSON.stringify({ zt: 1, dom: "https://developer.lanzoui.com", url: "token_old" }), + ) + } + if (urlStr.includes("developer.lanzoui.com/file")) { + return new Response(null, { + status: 302, + headers: { location: "https://cdn.example.com/legacy.zip" }, + }) + } + if (urlStr.includes("pan.lanzoui.com/b00test")) { + return new Response(mockFilePage) + } + return new Response("Not Found", { status: 404 }) + } + + const item = await driver.get("/b00test", "/legacy.zip") + const got = posted as { url: string; form: URLSearchParams } | null + if (!got) throw new Error("下载接口未被调用") + // 旧版仍应 POST 到分享域相对地址，而不是 apifile + if (got.url !== "https://pan.lanzoui.com/ajaxfile.php?file=555") { + throw new Error(`旧版下载接口地址错误: ${got.url}`) + } + if (got.form.get("signs") !== "OLD_AJAX") throw new Error("signs 未透传") + if (got.form.get("sign") !== "OLD_SIGN") throw new Error("sign 未透传") + if (item.raw_url !== "https://cdn.example.com/legacy.zip") { + throw new Error(`直链错误: ${item.raw_url}`) + } + } finally { + globalThis.fetch = originalFetch + } +}) + // Clean up scratch files try { const fs = await import("fs") diff --git a/src/backend/drivers/lanzou/help.ts b/src/backend/drivers/lanzou/help.ts index 3c3d275d..56e48e33 100644 --- a/src/backend/drivers/lanzou/help.ts +++ b/src/backend/drivers/lanzou/help.ts @@ -117,7 +117,7 @@ export function removeJSComment(data: string): string { inComment = true i++ continue - } else if (nextChar === "/") { + } else if (nextChar === "/" && !isUrlDoubleSlash(result)) { inSingleLineComment = true i++ continue @@ -129,6 +129,22 @@ export function removeJSComment(data: string): string { return result } +/** + * 判断紧随其后的 '//' 是否为 URL 的一部分（而非行注释）。 + * 两类已知误伤都要放过： + * 1. 'https://' —— scheme 冒号紧跟 '//'（改版后页面大量使用绝对地址）； + * 2. 协议相对地址 '//'cdn...'' —— 出现在字符串字面量里，前一个已输出字符是引号。 + * 宁多保留、不误删：多留一段注释文本无害，截断真实 URL 致命。 + */ +function isUrlDoubleSlash(emitted: string): boolean { + return ( + emitted.endsWith(":") || + emitted.endsWith("'") || + emitted.endsWith('"') || + emitted.endsWith("`") + ) +} + function unbox(hexStr: string): string { const box = [ 6, 28, 34, 31, 33, 18, 30, 23, 9, 8, 19, 38, 17, 24, 0, 5, 32, 21, 10, 22, diff --git a/src/backend/drivers/lanzou/util.test.ts b/src/backend/drivers/lanzou/util.test.ts new file mode 100644 index 00000000..4fbed019 --- /dev/null +++ b/src/backend/drivers/lanzou/util.test.ts @@ -0,0 +1,301 @@ +import assert from "node:assert/strict" +import { afterEach, test } from "node:test" + +import { isTrustedLanzouApiUrl, LanzouClient, parseFnPage } from "./util" +import { removeJSComment } from "./help" + +const originalFetch = globalThis.fetch + +afterEach(() => { + globalThis.fetch = originalFetch +}) + +const SHARE_DOMAIN = "https://pan.lanzoui.com" +const SHARE_ID = "b00test" + +const SHARE_PAGE = `测试文件.zip - 蓝奏云 + +` + +/** 2026-10 改版 /fn 内页：下载接口为 apifile 绝对地址 + 签名参数 */ +const FN_PAGE = `` + +/** 旧版 /fn 内页：相对路径 + data 对象 */ +const LEGACY_FN_PAGE = `` + +interface CapturedPost { + url: string + form: URLSearchParams + headers: Record +} + +/** 安装 fetch 桩：/fn 内页返回 fnPage，下载接口返回 JSON，直链探测 302 到 CDN */ +function installFetch(fnPage: string): { + posts: CapturedPost[] + gets: string[] +} { + const posts: CapturedPost[] = [] + const gets: string[] = [] + globalThis.fetch = (async (input: any, init: any = {}) => { + const url = typeof input === "string" ? input : input.url + const method = (init.method || "GET").toUpperCase() + + if (url.includes("/fn?")) { + gets.push(url) + return new Response(fnPage, { status: 200 }) + } + if (method === "POST") { + posts.push({ + url, + form: new URLSearchParams(String(init.body || "")), + headers: init.headers || {}, + }) + return new Response( + JSON.stringify({ zt: 1, dom: "https://dev.lanzou.com", url: "abcdef" }), + { status: 200, headers: { "content-type": "application/json" } }, + ) + } + if (url.includes("/file/")) { + return new Response(null, { + status: 302, + headers: { location: "https://cdn.example.com/real.zip" }, + }) + } + throw new Error(`unexpected request: ${method} ${url}`) + }) as typeof fetch + return { posts, gets } +} + +function newClient(): LanzouClient { + return new LanzouClient({ type: "url", shareUrl: SHARE_DOMAIN }) +} + +test("parseFnPage extracts apifile url and sign form", () => { + const parsed = parseFnPage(FN_PAGE) + assert.ok(parsed) + assert.equal( + parsed!.url, + "https://apifile.woozooo.com/ajaxfile.php?file=1234567", + ) + assert.equal(parsed!.fileId, "1234567") + assert.deepEqual(parsed!.form, { + action: "downprocess", + websignkey: "DATAVALUE", + signs: "DATAVALUE", + sign: "SIGNVALUE", + websign: "2", + kd: "1", + ves: "1", + }) +}) + +test("parseFnPage returns null for legacy page", () => { + assert.equal(parseFnPage(LEGACY_FN_PAGE), null) +}) + +test("parseFnPage returns null when sign vars are missing", () => { + // 只有 domain1、缺 wp_sign / ajaxdata：不算改版结构，交给旧版兜底 + const partial = `` + assert.equal(parseFnPage(partial), null) + + const noAjaxData = `` + assert.equal(parseFnPage(noAjaxData), null) +}) + +test("removeJSComment keeps url '//' but strips real comments", () => { + const src = [ + "var a = 'https://apifile.woozooo.com/ajaxfile.php?file=1' // 行注释", + "/* 块注释 */ var b = 1;", + ].join("\n") + const out = removeJSComment(src) + assert.ok(out.includes("https://apifile.woozooo.com/ajaxfile.php?file=1")) + assert.ok(!out.includes("行注释")) + assert.ok(!out.includes("块注释")) + assert.ok(out.includes("var b = 1;")) +}) + +test("removeJSComment keeps protocol-relative urls inside strings", () => { + // 评审 P2：src="//cdn..." 的前两个字符也是 '//' 且前面是引号，不能当行注释截断 + const src = ` var b = 1 // 真注释` + const out = removeJSComment(src) + assert.ok(out.includes("//cdn.woozooo.com/x.js")) + assert.ok(!out.includes("真注释")) + assert.ok(out.includes("var b = 1")) +}) + +test("isTrustedLanzouApiUrl only allows https lanzou hosts", () => { + // 可信：蓝奏云自家域（含子域） + assert.equal( + isTrustedLanzouApiUrl("https://apifile.woozooo.com/ajaxfile.php?file=1"), + true, + ) + assert.equal(isTrustedLanzouApiUrl("https://user.lanzn.com/fn?x=1"), true) + assert.equal( + isTrustedLanzouApiUrl("https://pan.lanzoui.com/ajaxfile.php?file=1"), + true, + ) + // 不可信：非 https + assert.equal( + isTrustedLanzouApiUrl("http://apifile.woozooo.com/ajaxfile.php?file=1"), + false, + ) + // 不可信：近似域（evilwoozooo.com 不是 .woozooo.com 的子域） + assert.equal( + isTrustedLanzouApiUrl( + "https://apifile.evilwoozooo.com/ajaxfile.php?file=1", + ), + false, + ) + assert.equal( + isTrustedLanzouApiUrl("https://apifile.woozooo.com.evil.com/ajaxfile.php"), + false, + ) + // 不可信：userinfo 伪装（apifile.woozooo.com@evil.com 的主机是 evil.com） + assert.equal( + isTrustedLanzouApiUrl("https://apifile.woozooo.com@evil.com/ajaxfile.php"), + false, + ) + // 不可信：loopback / 私网 / 内网元数据地址 + assert.equal( + isTrustedLanzouApiUrl("https://127.0.0.1/ajaxfile.php?file=1"), + false, + ) + assert.equal( + isTrustedLanzouApiUrl("https://169.254.169.254/ajaxfile.php?file=1"), + false, + ) + assert.equal( + isTrustedLanzouApiUrl("https://10.0.0.5/ajaxfile.php?file=1"), + false, + ) + assert.equal( + isTrustedLanzouApiUrl("https://[::1]/ajaxfile.php?file=1"), + false, + ) + // 不可信：非法 URL + assert.equal(isTrustedLanzouApiUrl("not a url"), false) +}) + +test("new /fn structure posts to absolute apifile url with sign form", async () => { + const { posts, gets } = installFetch(FN_PAGE) + const file = await newClient().getFilesByShareUrl( + SHARE_ID, + "", + SHARE_PAGE, + SHARE_DOMAIN, + ) + + assert.deepEqual(gets, [`${SHARE_DOMAIN}/fn?abcd1234`]) + assert.equal(posts.length, 1) + assert.equal( + posts[0].url, + "https://apifile.woozooo.com/ajaxfile.php?file=1234567", + ) + assert.equal(posts[0].form.get("action"), "downprocess") + assert.equal(posts[0].form.get("websignkey"), "DATAVALUE") + assert.equal(posts[0].form.get("signs"), "DATAVALUE") + assert.equal(posts[0].form.get("sign"), "SIGNVALUE") + assert.equal(posts[0].form.get("websign"), "2") + // 与上游 Go 版一致：跨域 POST 的 Referer 回落为 baseUrl + assert.equal(posts[0].headers["Referer"], "https://pc.woozooo.com") + + assert.equal(file.name_all, "测试文件.zip") + assert.equal(file.url, "https://cdn.example.com/real.zip") +}) + +test("legacy /fn structure still posts to share-domain ajaxfile.php", async () => { + const { posts } = installFetch(LEGACY_FN_PAGE) + const file = await newClient().getFilesByShareUrl( + SHARE_ID, + "", + SHARE_PAGE, + SHARE_DOMAIN, + ) + + assert.equal(posts.length, 1) + assert.equal(`${SHARE_DOMAIN}/ajaxfile.php?file=888`, posts[0].url) + assert.equal(posts[0].form.get("signs"), "OLDSIGN") + assert.equal(file.url, "https://cdn.example.com/real.zip") +}) + +test("absolute iframe src is used as-is instead of being prefixed", async () => { + const { gets, posts } = installFetch(FN_PAGE) + const subDomain = "https://user.lanzn.com" + const page = `` + + await newClient().getFilesByShareUrl(SHARE_ID, "", page, subDomain) + + assert.deepEqual(gets, [`${subDomain}/fn?abcd1234`]) + assert.equal( + posts[0].url, + "https://apifile.woozooo.com/ajaxfile.php?file=1234567", + ) +}) + +test("legacy markers win when the page carries both legacy and fn structure", async () => { + // 优先级约定：旧版严格正则先命中就不再看 /fn 结构（与上游 Go 版一致） + const mixed = `` + + const { posts } = installFetch(mixed) + await newClient().getFilesByShareUrl(SHARE_ID, "", SHARE_PAGE, SHARE_DOMAIN) + + assert.equal(posts.length, 1) + assert.equal(`${SHARE_DOMAIN}/ajaxfile.php?file=777`, posts[0].url) + assert.equal(posts[0].form.get("signs"), "OLDSIGN") +}) + +test("unrecognized page reports an actionable error instead of 'not find file id'", async () => { + const unknown = `` + + installFetch(unknown) + await assert.rejects( + () => + newClient().getFilesByShareUrl(SHARE_ID, "", SHARE_PAGE, SHARE_DOMAIN), + /未能识别下载页结构/, + ) +}) + +test("fn page pointing outside lanzou domains is rejected (SSRF guard)", async () => { + // 评审 P1：domain1 由远端页面内容决定，指向非蓝奏云域时必须拒绝， + // 且不能发出任何请求（ Cookie 不得外送） + for (const badHost of [ + "https://evil.example.com", + "https://127.0.0.1", + "https://169.254.169.254", + "http://apifile.woozooo.com", + ]) { + const evil = FN_PAGE.replace("https://apifile.woozooo.com", badHost) + const { posts } = installFetch(evil) + await assert.rejects( + () => + newClient().getFilesByShareUrl(SHARE_ID, "", SHARE_PAGE, SHARE_DOMAIN), + /可信域名/, + ) + assert.equal(posts.length, 0, `${badHost} 不应发出任何请求`) + } +}) diff --git a/src/backend/drivers/lanzou/util.ts b/src/backend/drivers/lanzou/util.ts index 42e8d7a5..12d1914e 100644 --- a/src/backend/drivers/lanzou/util.ts +++ b/src/backend/drivers/lanzou/util.ts @@ -27,6 +27,90 @@ const LANZOU_SHARE_DOMAINS = [ /** 蓝奏云 Cookie 过期提示文案（cookie 有效期约 15 天） */ const COOKIE_EXPIRED_MSG = "[Lanzou] Cookie 已过期或失效，请在管理后台重新填写 Cookie（有效期约 15 天）" +/** 旧版分享下载页结构：相对路径 '/ajaxm.php?file=N'（带引号） */ +const LEGACY_FILE_ID_RE = /'\/ajax(?:file|m)\.php\?file=(\d+)'/ + +/** 2026-10 改版：文件页将下载参数移入 /fn? 内页，接口变为 apifile 绝对地址并携带签名 */ +const FN_DOMAIN_RE = /var\s+domain[12]\s*=\s*'([^']*(?:ajaxfile|ajaxm)\.php\?file=(\d+)[^']*)'/ +const FN_SIGN_RE = /var\s+wp_sign\s*=\s*'([^']*)'/ +const FN_AJAXDATA_RE = /var\s+ajaxdata\s*=\s*'([^']*)'/ + +/** 新旧结构都不匹配时的提示：说明页面可能又改版了，而不是笼统的"未找到文件 ID" */ +const UNKNOWN_SHARE_PAGE_MSG = + "[Lanzou] 未能识别下载页结构（旧版 /ajaxm.php 与 2026-10 的 /fn 结构都不匹配），蓝奏云可能再次改版，需要更新驱动" + +/** /fn 页面给出的接口地址不在可信域名内的提示（SSRF / Cookie 外送防护） */ +const UNTRUSTED_API_URL_MSG = + "[Lanzou] /fn 页面给出的下载接口地址不在蓝奏云可信域名内，已拒绝请求（防止 SSRF）。" + + "如蓝奏云更换接口域名，请更新驱动的可信域名列表" + +/** + * 下载接口允许的域名后缀（后缀匹配，近似域如 evilwoozooo.com 不会命中）。 + * /fn 页面给出的绝对地址只允许发往蓝奏云自家域：既防止被篡改/注入的页面把 + * 服务端请求引向任意主机（SSRF / 内网探测），也保证驱动 Cookie 不会带出蓝奏云域。 + */ +const TRUSTED_API_HOST_SUFFIXES = [ + "woozooo.com", // apifile.woozooo.com（2026-10 改版的下载接口） + "lanzn.com", // 蓝奏云账号分享子域（xxx.lanzn.com） + "lanzoui.com", // 以下为蓝奏云轮换使用的分享/接口域家族 + "lanzouw.com", + "lanzoux.com", + "lanzouy.com", + "lanzou.com", +] + +/** + * 校验 /fn 页面解析出的下载接口地址是否可信。 + * @returns 仅当协议为 https 且主机属于蓝奏云可信域（精确后缀匹配，含子域）时返回 true； + * 非法 URL、非 https、loopback/私网 IP、近似域、userinfo 伪装一律 false + */ +export function isTrustedLanzouApiUrl(raw: string): boolean { + let url: URL + try { + url = new URL(raw) + } catch { + return false + } + if (url.protocol !== "https:") return false + const host = url.hostname.toLowerCase() + return TRUSTED_API_HOST_SUFFIXES.some( + (s) => host === s || host.endsWith(`.${s}`), + ) +} + +/** + * 从改版后的 /fn? 内页提取下载接口地址与签名表单。 + * 对应页面 JS：POST domain1 {'action':'downprocess','websignkey':ajaxdata, + * 'signs':ajaxdata,'sign':wp_sign,'websign':'2','kd':kdns,'ves':1} + * @param pageData /fn 内页 HTML（建议先过 removeNotes） + * @returns 解析成功返回 { url, fileId, form }；未命中改版结构（缺 domain1/wp_sign/ajaxdata） + * 返回 null —— 这不是错误，调用方应回退到旧版解析 + */ +export function parseFnPage(pageData: string): { + url: string + fileId: string + form: Record +} | null { + const domainMatch = pageData.match(FN_DOMAIN_RE) + if (!domainMatch) return null + const signMatch = pageData.match(FN_SIGN_RE) + const ajaxDataMatch = pageData.match(FN_AJAXDATA_RE) + if (!signMatch || !ajaxDataMatch) return null + return { + url: domainMatch[1], + fileId: domainMatch[2], + form: { + action: "downprocess", + websignkey: ajaxDataMatch[1], + signs: ajaxDataMatch[1], + sign: signMatch[1], + websign: "2", + kd: "1", + ves: "1", + }, + } +} + export class LanzouClient { private addition: LanzouAddition private cookie: string = "" @@ -667,6 +751,31 @@ export class LanzouClient { return files } + /** + * POST 分享下载接口并解析响应。 + * 旧版走分享域相对地址（ajaxfile.php?file=N），2026-10 改版走 apifile 绝对地址 + 签名表单。 + * @param referer 省略时使用 baseUrl（与上游 Go 版一致） + */ + private async postShareAjax( + url: string, + form: Record, + referer?: string, + ): Promise { + const resStr = await this.request(url, "POST", form, referer) + let resp: LanzouShareResp + try { + resp = JSON.parse(resStr) + } catch { + throw new Error(`[Lanzou] 下载接口响应格式错误: ${resStr}`) + } + if (resp.zt !== 1) { + throw new Error( + resp.info || resp.text || `[Lanzou] 提取链接失败 (zt=${resp.zt})`, + ) + } + return resp + } + /** * 解析单文件分享页面并提取下载直链 */ @@ -749,7 +858,11 @@ export class LanzouClient { } const iframePath = iframeMatch[1] - const iframeFullUrl = `${shareBaseDomain}${iframePath.startsWith("/") ? "" : "/"}${iframePath}` + // 改版后 iframe 可能直接给绝对地址（如 https://xxx.lanzn.com/fn?token）， + // 此时不能再拼 shareBaseDomain，否则会拼成 https://hosthttps://host/fn?... + const iframeFullUrl = /^https?:\/\//i.test(iframePath) + ? iframePath + : `${shareBaseDomain}${iframePath.startsWith("/") ? "" : "/"}${iframePath}` const nextPageData = await this.request( iframeFullUrl, "GET", @@ -757,32 +870,49 @@ export class LanzouClient { sharePageUrl, ) const cleanNextPage = removeNotes(nextPageData) - param = htmlJsonToMap(cleanNextPage, cleanNextPage) - const fileIdMatch = - cleanNextPage.match(/['"]?\/?ajax(?:file|m)\.php\?file=(\d+)['"]?/) || - cleanNextPage.match(/file\s*[:=]\s*['"]?(\d+)['"]?/) || - cleanNextPage.match(/file=(\d+)/) || - cleanNextPage.match(/var\s+file_id\s*=\s*['"]?(\d+)['"]?/) - const fileId = fileIdMatch ? fileIdMatch[1] : "" - if (!fileId) throw new Error("[Lanzou] 未找到文件 ID") - - const resStr = await this.request( - `${shareBaseDomain}/ajaxfile.php?file=${fileId}`, - "POST", - param, - iframeFullUrl, - ) let resp: LanzouShareResp - try { - resp = JSON.parse(resStr) - } catch { - throw new Error(`[Lanzou] ajaxfile.php 响应格式错误: ${resStr}`) - } - if (resp.zt !== 1) { - throw new Error( - resp.info || resp.text || `[Lanzou] 提取链接失败 (zt=${resp.zt})`, + const legacyIdMatch = cleanNextPage.match(LEGACY_FILE_ID_RE) + if (legacyIdMatch) { + // 旧版结构：相对路径 /ajaxm.php?file=N + param = htmlJsonToMap(cleanNextPage, cleanNextPage) + resp = await this.postShareAjax( + `${shareBaseDomain}/ajaxfile.php?file=${legacyIdMatch[1]}`, + param, + iframeFullUrl, ) + } else { + const fnPage = parseFnPage(cleanNextPage) + if (fnPage) { + // 2026-10 改版结构：/fn? 内页携带 apifile 绝对地址与签名参数， + // 必须原样 POST 到该地址（签名与 file=N 绑定），不能再拼成分享域相对路径。 + // 接口地址来自远端页面文本，先做可信域校验（评审 P1：防 SSRF / Cookie 外送） + if (!isTrustedLanzouApiUrl(fnPage.url)) { + throw new Error( + `${UNTRUSTED_API_URL_MSG}（host: ${safeHost(fnPage.url)}）`, + ) + } + resp = await this.postShareAjax(fnPage.url, fnPage.form) + } else { + // 兜底：页面变体（无引号 / 无前导斜杠），沿用原有宽松提取。 + // 注意：不放行裸 `file=(\d+)` / `file: 123` 这类猜测 —— 它们会在 apifile + // 绝对地址上"蒙对" file ID 然后发一个注定失败的请求；识别不了就显式失败 + try { + param = htmlJsonToMap(cleanNextPage, cleanNextPage) + } catch { + throw new Error(UNKNOWN_SHARE_PAGE_MSG) + } + const fileIdMatch = + cleanNextPage.match(/['"]?\/?ajax(?:file|m)\.php\?file=(\d+)['"]?/) || + cleanNextPage.match(/var\s+file_id\s*=\s*['"]?(\d+)['"]?/) + const fileId = fileIdMatch ? fileIdMatch[1] : "" + if (!fileId) throw new Error(UNKNOWN_SHARE_PAGE_MSG) + resp = await this.postShareAjax( + `${shareBaseDomain}/ajaxfile.php?file=${fileId}`, + param, + iframeFullUrl, + ) + } } baseUrl = `${resp.dom}/file`