150 lines
4.6 KiB
JavaScript
150 lines
4.6 KiB
JavaScript
/**
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* OA PDF 预览页 query 解析（短 fileUrl / 兼容旧 url）
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* 微信 onLoad 可能已 decode 一次；须安全二次解码，并兼容大小写 key。
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*/
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const LOG_TAG = '[oa-pdf-preview]'
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export function pdfPreviewLog(...args) {
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try {
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console.log(LOG_TAG, ...args)
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} catch (_) {
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/* ignore */
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}
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}
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export function safeDecodeURIComponent(value) {
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const raw = String(value == null ? '' : value).trim()
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if (!raw) return ''
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try {
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return decodeURIComponent(raw)
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} catch (_) {
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return raw
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}
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}
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/** 按候选 key 取值；忽略大小写；兼容微信偶发改写 */
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export function pickQueryValue(query, keys) {
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const q = query && typeof query === 'object' ? query : {}
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const list = Array.isArray(keys) ? keys : [keys]
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for (let i = 0; i < list.length; i++) {
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const k = list[i]
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if (k == null) continue
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if (Object.prototype.hasOwnProperty.call(q, k) && q[k] != null) {
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const v = String(q[k]).trim()
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if (v) return v
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}
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}
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const lowerMap = {}
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Object.keys(q).forEach((k) => {
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lowerMap[String(k).toLowerCase()] = q[k]
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})
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for (let i = 0; i < list.length; i++) {
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const k = String(list[i] || '').toLowerCase()
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if (!k) continue
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if (lowerMap[k] != null) {
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const v = String(lowerMap[k]).trim()
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if (v) return v
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}
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}
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return ''
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}
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/**
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* @returns {{ fileUrl: string, legacyUrl: string, name: string, rawKeys: string[] }}
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*/
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export function parsePdfPreviewQuery(query) {
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const rawKeys = Object.keys(query && typeof query === 'object' ? query : {})
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const fileUrl = safeDecodeURIComponent(
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pickQueryValue(query, ['fileUrl', 'fileurl', 'file_url', 'f'])
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)
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const legacyUrl = safeDecodeURIComponent(
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pickQueryValue(query, ['url', 'downloadUrl', 'download_url'])
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)
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const name =
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safeDecodeURIComponent(pickQueryValue(query, ['name', 'fileName', 'file_name', 'n'])) ||
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'approval.pdf'
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return { fileUrl, legacyUrl, name, rawKeys }
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}
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/**
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* 后端 MINIO_BASE_URL 常配成同域相对路径（如 /minio/zkxw），预签名改写后也是
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* `/minio/zkxw/...?X-Amz-...`。微信 downloadFile 必须绝对 http(s)。
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*
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* @param {string} url
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* @param {{ apiBaseUrl?: string, minioBaseUrl?: string }} [bases]
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*/
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export function toAbsoluteDownloadUrl(url, bases = {}) {
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const s = String(url || '').trim()
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if (!s) return ''
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if (/^https?:\/\//i.test(s)) return s
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if (s.startsWith('//')) return 'https:' + s
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const apiBase = String(bases.apiBaseUrl || '').trim()
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const minioBase = String(bases.minioBaseUrl || '').trim()
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const originFrom = (base) => {
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const m = String(base || '').match(/^(https?:\/\/[^/]+)/i)
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return m ? m[1] : ''
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}
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const origin = originFrom(apiBase) || originFrom(minioBase)
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if (s.startsWith('/')) {
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return origin ? origin + s : ''
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}
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// 相对 object key
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const minio = minioBase.replace(/\/$/, '')
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if (/^https?:\/\//i.test(minio)) {
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return minio + '/' + s.replace(/^\//, '')
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}
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if (minio.startsWith('/') && origin) {
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return origin + minio + '/' + s.replace(/^\//, '')
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}
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return ''
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}
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/**
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* 拼 MinIO 公网直链（无预签名）。
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* 预签名经相对路径改写后微信 downloadFile 常 403；公网直链对本环境可 200。
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*/
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export function buildDirectMinioUrl(fileUrl, bases = {}) {
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const raw = String(fileUrl || '').trim()
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if (!raw) return ''
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const minioBase = String(bases.minioBaseUrl || '').replace(/\/$/, '')
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const apiBase = String(bases.apiBaseUrl || '').trim()
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const originMatch = (apiBase || minioBase).match(/^(https?:\/\/[^/]+)/i)
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const origin = originMatch ? originMatch[1] : ''
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// 已是绝对 http(s)：去掉 query（签名）后若可识别为同域 MinIO 则规范化，否则原样去 query
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if (/^https?:\/\//i.test(raw)) {
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const noQuery = raw.split('?')[0]
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try {
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const u = new URL(noQuery)
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const minioPath = minioBase.replace(/^https?:\/\/[^/]+/i, '') || ''
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if (minioPath && u.pathname.indexOf(minioPath) === 0) {
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return origin && minioPath.startsWith('/')
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? origin + u.pathname
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: noQuery
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}
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} catch (_) {
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/* ignore */
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}
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return noQuery
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}
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// 根相对：/minio/zkxw/key.pdf?... → 拼 origin
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if (raw.startsWith('/')) {
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const pathOnly = raw.split('?')[0]
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return origin ? origin + pathOnly : toAbsoluteDownloadUrl(pathOnly, bases)
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}
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// object key：去掉可能误带的 minio 路径前缀
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let key = raw.replace(/^\//, '').split('?')[0]
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const minioPath = minioBase.replace(/^https?:\/\/[^/]+/i, '').replace(/^\//, '')
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if (minioPath && key.indexOf(minioPath + '/') === 0) {
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key = key.slice(minioPath.length + 1)
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}
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return toAbsoluteDownloadUrl(key, bases)
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}
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