update at 2026-02-08 22:31:25

miniprogram/utils/mp/file-export.js

@@ -25,6 +25,17 @@ async function saveSvgToUserPath(svgText, fontName, text) {
   return writeTextToUserPath(svgText, 'svg', filename)
 }
 
+function saveSvgToUserPathSync(svgText, fontName, text) {
+  const filename = buildFilename(fontName, text, 'svg')
+  const filePath = `${wx.env.USER_DATA_PATH}/${filename}`
+  const fs = wx.getFileSystemManager()
+  fs.writeFileSync(filePath, svgText, 'utf8')
+  return {
+    filePath,
+    fileName: filename,
+  }
+}
+
 async function shareLocalFile(filePath, fileName) {
   if (typeof wx.shareFileMessage !== 'function') {
     throw new Error('当前微信版本不支持文件分享')
@@ -40,10 +51,29 @@ async function shareLocalFile(filePath, fileName) {
   })
 }
 
+function shareSvgFromUserTap(svgText, fontName, text) {
+  if (typeof wx.shareFileMessage !== 'function') {
+    throw new Error('当前微信版本不支持文件分享')
+  }
+
+  const { filePath, fileName } = saveSvgToUserPathSync(svgText, fontName, text)
+
+  return new Promise((resolve, reject) => {
+    wx.shareFileMessage({
+      filePath,
+      fileName,
+      success: resolve,
+      fail: reject,
+    })
+  })
+}
+
 module.exports = {
   sanitizeFilename,
   buildFilename,
   writeTextToUserPath,
   saveSvgToUserPath,
+  saveSvgToUserPathSync,
   shareLocalFile,
+  shareSvgFromUserTap,
 }

miniprogram/utils/mp/render-api.js

@@ -27,6 +27,24 @@ function normalizeResult(data) {
   }
 }
 
+function decodeArrayBuffer(buffer) {
+  try {
+    if (!buffer) return ''
+    if (typeof buffer === 'string') return buffer
+    if (typeof TextDecoder === 'function') {
+      return new TextDecoder('utf-8').decode(buffer)
+    }
+    const bytes = new Uint8Array(buffer)
+    let text = ''
+    for (let i = 0; i < bytes.length; i += 1) {
+      text += String.fromCharCode(bytes[i])
+    }
+    return decodeURIComponent(escape(text))
+  } catch (error) {
+    return ''
+  }
+}
+
 async function renderSvgByApi(payload) {
   const app = getApp()
   const timeout = app && app.globalData && app.globalData.apiTimeoutMs
@@ -62,6 +80,52 @@ async function renderSvgByApi(payload) {
   return normalizeResult(body.data)
 }
 
+async function renderPngByApi(payload) {
+  const app = getApp()
+  const timeout = app && app.globalData && app.globalData.apiTimeoutMs
+    ? Number(app.globalData.apiTimeoutMs)
+    : 30000
+  const baseApiUrl = buildApiUrl()
+  const apiUrl = /\/api\/render-svg$/.test(baseApiUrl)
+    ? baseApiUrl.replace(/\/api\/render-svg$/, '/api/render-png')
+    : `${baseApiUrl.replace(/\/$/, '')}/render-png`
+
+  const response = await request({
+    url: apiUrl,
+    method: 'POST',
+    timeout,
+    responseType: 'arraybuffer',
+    header: {
+      'content-type': 'application/json',
+      accept: 'image/png',
+    },
+    data: {
+      fontId: payload.fontId,
+      text: payload.text,
+      fontSize: payload.fontSize,
+      fillColor: payload.fillColor,
+      letterSpacing: payload.letterSpacing,
+      maxCharsPerLine: payload.maxCharsPerLine,
+    },
+  })
+
+  if (!response || response.statusCode !== 200) {
+    let message = `PNG 渲染服务请求失败，状态码: ${response && response.statusCode}`
+    const maybeText = decodeArrayBuffer(response && response.data)
+    if (maybeText && maybeText.includes('error')) {
+      message = maybeText
+    }
+    throw new Error(message)
+  }
+
+  if (!(response.data instanceof ArrayBuffer)) {
+    throw new Error('PNG 渲染服务返回格式无效')
+  }
+
+  return response.data
+}
+
 module.exports = {
   renderSvgByApi,
+  renderPngByApi,
 }