shanxia2.0/miniprogram/pages/common/mp-webview.vue

<template>
  <view class="mp-wv-page">
    <view v-if="errorText" class="mp-wv-error">
      <text class="mp-wv-error__title">{{ errorText }}</text>
    </view>
    <!-- 等 onReady 后再挂载 web-view，避免跳转尚未完成时嵌入 H5 导致 navigateTo:fail timeout -->
    <web-view v-else-if="src" :src="src" @message="onWebViewMessage" />
    <view v-else class="mp-wv-error">加载中…</view>
  </view>
</template>

<script setup>
import { onMounted, onUnmounted, ref } from 'vue'
import { onLoad, onReady, onShow } from '@dcloudio/uni-app'
import { AUTH_API, PAGE_PATHS, resolveApiBase, resolveWebOrigin } from '@/config/api'
import { request, parseResponseJson } from '@/utils/request'
import { useUserStore } from '@/stores/user'

/** 热更新错配时：本地签发 ticket、生产打开 H5 → 401 */
function assertTicketEnvAligned() {
  const api = resolveApiBase()
  const web = resolveWebOrigin()
  const apiLocal = /127\.0\.0\.1|localhost/.test(api)
  const webLocal = /127\.0\.0\.1|localhost/.test(web)
  const apiProd = /shanxiachem\.com/.test(api)
  const webProd = /shanxiachem\.com/.test(web)
  if (apiLocal !== webLocal || apiProd !== webProd) {
    throw new Error(
      `环境错配：API=${api}，Web=${web}。请停止后重新「运行到小程序」完整编译，不要只靠热更新。`
    )
  }
}

const MP_WEBVIEW_GO_WORKBENCH = 'MP_WEBVIEW_GO_WORKBENCH'
const MP_WEBVIEW_COPY_TEXT = 'MP_WEBVIEW_COPY_TEXT'

const src = ref('')
const errorText = ref('')
const pageReady = ref(false)
/** ticket 就绪后的完整 H5 URL，等 pageReady 再赋给 src */
let pendingSrc = ''

function normalizePath(raw) {
  let path = String(raw || '').trim()
  for (let i = 0; i < 3; i++) {
    if (!path || path.startsWith('/m/')) break
    try {
      const next = decodeURIComponent(path)
      if (next === path) break
      path = next.trim()
    } catch {
      break
    }
  }
  return path
}

function isAllowedPath(path) {
  return typeof path === 'string' && path.startsWith('/m/')
}

function goWorkbench() {
  uni.reLaunch({ url: PAGE_PATHS.workbench })
}

function tryMountWebView() {
  if (!pageReady.value || !pendingSrc || errorText.value) return
  src.value = pendingSrc
  pendingSrc = ''
}

function fallbackExecCommandCopy(text) {
  // #ifdef H5
  try {
    if (typeof document === 'undefined') return false
    const textarea = document.createElement('textarea')
    textarea.value = text
    textarea.setAttribute('readonly', '')
    textarea.style.position = 'fixed'
    textarea.style.left = '-9999px'
    document.body.appendChild(textarea)
    textarea.select()
    const ok = document.execCommand('copy')
    document.body.removeChild(textarea)
    return ok
  } catch {
    return false
  }
  // #endif
  // #ifndef H5
  return false
  // #endif
}

async function copyTextOnHost(text) {
  const value = String(text || '')
  if (!value) return false
  // #ifdef H5
  try {
    if (typeof navigator !== 'undefined' && navigator.clipboard?.writeText) {
      await navigator.clipboard.writeText(value)
      return true
    }
  } catch {
    /* fall through */
  }
  if (fallbackExecCommandCopy(value)) {
    return true
  }
  // #endif
  return await new Promise((resolve) => {
    uni.setClipboardData({
      data: value,
      success: () => resolve(true),
      fail: () => resolve(false)
    })
  })
}

function handleHostPayload(data) {
  if (!data || typeof data !== 'object') return
  if (data.type === MP_WEBVIEW_GO_WORKBENCH) {
    goWorkbench()
    return
  }
  if (data.type === MP_WEBVIEW_COPY_TEXT) {
    void copyTextOnHost(data.text)
  }
}

function onWebViewMessage(event) {
  const list = event && event.detail && event.detail.data
  if (!Array.isArray(list)) return
  for (let i = list.length - 1; i >= 0; i--) {
    handleHostPayload(list[i])
  }
}

function onHostMessage(event) {
  handleHostPayload(event && event.data)
}

async function fetchMpWebviewTicket(maxAttempts = 3) {
  let lastMessage = '无法打开内嵌页'
  for (let attempt = 1; attempt <= maxAttempts; attempt++) {
    try {
      const res = await request({
        url: AUTH_API.MP_WEBVIEW_TICKET,
        method: 'POST'
      })
      const result = parseResponseJson(res)
      const code = result && result.code
      const message = (result && result.message) || ''
      const ticket = code === 200 ? result.data?.ticket : ''
      if (ticket) return ticket
      lastMessage = message || lastMessage
      if (Number(code) === 503 && attempt < maxAttempts) {
        await new Promise((r) => setTimeout(r, 300 * attempt))
        continue
      }
      break
    } catch (error) {
      const errMsg = (error && error.message) || String(error)
      lastMessage = errMsg || lastMessage
      if (/timeout|fail|网络/i.test(String(lastMessage)) && attempt < maxAttempts) {
        await new Promise((r) => setTimeout(r, 300 * attempt))
        continue
      }
      throw error
    }
  }
  throw new Error(lastMessage)
}

async function bootstrapWebView(path) {
  const userStore = useUserStore()
  userStore.checkLoginStatus()
  if (!userStore.isLoggedIn) {
    uni.reLaunch({ url: PAGE_PATHS.login })
    return
  }

  try {
    assertTicketEnvAligned()
    const ticket = await fetchMpWebviewTicket()
    const origin = String(resolveWebOrigin() || '').replace(/\/$/, '')
    const returnOrigin =
      typeof window !== 'undefined' && window.location && window.location.origin
        ? window.location.origin
        : ''
    const qsParts = [`mpTicket=${encodeURIComponent(ticket)}`]
    if (returnOrigin) {
      qsParts.push(`mpReturnOrigin=${encodeURIComponent(returnOrigin)}`)
    }
    const qs = qsParts.join('&')
    pendingSrc = `${origin}/?${qs}#${path}?${qs}`
    tryMountWebView()
  } catch (error) {
    const msg = (error && error.message) || '无法打开内嵌页'
    errorText.value = msg
    uni.showToast({ title: msg, icon: 'none', duration: 3500 })
  }
}

onLoad((query) => {
  const path = normalizePath(query?.path)
  if (!isAllowedPath(path)) {
    errorText.value = '无效地址'
    uni.showToast({ title: '无效地址', icon: 'none' })
    setTimeout(() => {
      goWorkbench()
    }, 1200)
    return
  }
  void bootstrapWebView(path)
})

onReady(() => {
  pageReady.value = true
  tryMountWebView()
})

onShow(() => {
  // #ifdef MP-WEIXIN
  try {
    if (typeof uni.hideHomeButton === 'function') {
      uni.hideHomeButton({})
    }
    // 中间标题留空，只留绿底与胶囊，和下方 H5 头视觉一体
    uni.setNavigationBarTitle({ title: '\u200B' })
    uni.setNavigationBarColor({
      frontColor: '#ffffff',
      backgroundColor: '#087f57'
    })
  } catch {
    /* ignore */
  }
  // #endif
})

onMounted(() => {
  // #ifdef H5
  if (typeof window !== 'undefined') {
    window.addEventListener('message', onHostMessage)
  }
  // #endif
})

onUnmounted(() => {
  // #ifdef H5
  if (typeof window !== 'undefined') {
    window.removeEventListener('message', onHostMessage)
  }
  // #endif
})
</script>

<style scoped>
.mp-wv-page {
  min-height: 100vh;
  background: #f5f8f7;
}
.mp-wv-error {
  padding: 32px 16px 8px;
  color: #6b7b74;
  font-size: 14px;
  text-align: center;
}
.mp-wv-error__title {
  color: #b45309;
  font-size: 15px;
  font-weight: 600;
}
</style>