接口返回blob，如何实现小程序下载

小程序中嵌入H5如何实现文件流的下载处理接口参数const userInfo LocalCache.getSession(userInfo); const orgType LocalCache.getSession(orgType); const { orgCode, accessToken, appToken } userInfo || {}; const token LocalCache.getCache(token); const origin window.location.origin; const params { startTime: data.startTime, endTime: data.endTime, gradeIds: data.gradeIds?.join(,) || , orgCode: userInfo.orgCode, }; const currentUrl encodeURIComponent(window.location.href); const paramsObj token${token}accessToken${accessToken}appToken${appToken} appKey${appKey}orgType${orgType};currentUrl 是下载之后需要返回的页面urlparamsObj 是接口请求头的参数如鉴权需要的参数处理下载接口需要用到的参数const query new URLSearchParams({ startTime: params.startTime, endTime: params.endTime, gradeIds: params.gradeIds, orgCode: params.orgCode, token, accessToken, appToken, appKey, orgType, source: orgType 11 ? pre : general, }); const url ${origin}/xgk/opengateway/preschool/api/v1/interaction/export/sta?${query.toString()};url 是下载接口的路径将参数拼接到后面转码处理如果url太长需要进行编码处理fileName、currentUrl等参数过场也需要编码处理const fileUrl encodeURIComponent(url); let allUrl /modules/fileCode/pages/handleFile/index?isDownload1fileName班级统计表.xlsxcurrentUrl${currentUrl}fileUrl${fileUrl}; console.log(allUrl, allUrl); wx.miniProgram.navigateTo({ url: allUrl, });/modules/fileCode/pages/handleFile/index 此处为固定路径后面的参数根据下载文件的内容进行修改项目里面引入微信apiimport wx from weixin-js-sdk;