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@@ -38,10 +38,70 @@ const fetchAgreement = async (id) => {
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agreementData.value = res
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// 解码 Base64 内容 (Admin端采用 btoa(unescape(encodeURIComponent(content))) 编码)
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if (res.content) {
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- try {
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- contentHtml.value = decodeURIComponent(escape(atob(res.content)))
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- } catch (e) {
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- // 如果解码失败，回显原始内容
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+ const cleanStr = String(res.content).trim().replace(/\s+/g, '')
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+ // 检查是否是 base64 格式（仅包含 A-Z, a-z, 0-9, +, /, =）
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+ const isBase64 = /^[A-Za-z0-9+/=]+$/.test(cleanStr)
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+
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+ if (isBase64) {
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+ try {
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+ // 1. Base64 解码为二进制字符串
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+ const atobPolyfill = (str) => {
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+ if (typeof atob === 'function') return atob(str)
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+ const chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/='
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+ let output = ''
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+ const clean = str.replace(/=+$/, '')
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+ for (let bc = 0, bs, buffer, idx = 0; idx < clean.length; ) {
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+ const char = clean.charAt(idx++)
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+ const buffer = chars.indexOf(char)
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+ if (buffer === -1) throw new Error('Invalid base64 character')
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+ bs = bc % 4 ? bs * 64 + buffer : buffer
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+ if (bc++ % 4) {
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+ output += String.fromCharCode(255 & bs >> (-2 * bc & 6))
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+ }
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+ }
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+ return output
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+ }
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+
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+ const decodedBinary = atobPolyfill(cleanStr)
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+
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+ // 2. 将二进制字符串解码为 UTF-8 字符串
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+ const decodeUtf8 = (str) => {
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+ let result = ''
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+ let i = 0
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+ while (i < str.length) {
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+ const c1 = str.charCodeAt(i++)
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+ if (c1 < 128) {
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+ result += String.fromCharCode(c1)
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+ } else if (c1 > 191 && c1 < 224) {
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+ const c2 = str.charCodeAt(i++)
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+ result += String.fromCharCode(((c1 & 31) << 6) | (c2 & 63))
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+ } else if (c1 > 223 && c1 < 240) {
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+ const c2 = str.charCodeAt(i++)
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+ const c3 = str.charCodeAt(i++)
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+ result += String.fromCharCode(((c1 & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63))
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+ } else {
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+ const c2 = str.charCodeAt(i++)
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+ const c3 = str.charCodeAt(i++)
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+ const c4 = str.charCodeAt(i++)
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+ const codepoint = ((c1 & 7) << 18) | ((c2 & 63) << 12) | ((c3 & 63) << 6) | (c4 & 63)
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+ if (codepoint > 0xffff) {
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+ const offset = codepoint - 0x10000
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+ result += String.fromCharCode((offset >> 10) + 0xd800, (offset & 0x3ff) + 0xdc00)
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+ } else {
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+ result += String.fromCharCode(codepoint)
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+ }
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+ }
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+ }
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+ return result
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+ }
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+
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+ contentHtml.value = decodeUtf8(decodedBinary)
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+ } catch (e) {
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+ // 解码失败，回显原始内容
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+ contentHtml.value = res.content
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+ }
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+ } else {
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+ // 非 base64 格式，直接回显原始 HTML 页面
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contentHtml.value = res.content
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}
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} else {
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