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56 lines
1.7 KiB
56 lines
1.7 KiB
const fsm = wx.getFileSystemManager();
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const FILE_BASE_NAME = 'tmp_base64src';
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const base64src = function(base64data) {
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return new Promise((resolve, reject) => {
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// 添加时间戳生成唯一文件名
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const timestamp = Date.now();
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const filePath = `${wx.env.USER_DATA_PATH}/${FILE_BASE_NAME}_${timestamp}.png`;
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const buffer = wx.base64ToArrayBuffer(base64data);
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fsm.writeFile({
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filePath,
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data: buffer,
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encoding: 'binary',
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success() {
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resolve(filePath);
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},
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fail() {
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reject(new Error('ERROR_BASE64SRC_WRITE'));
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},
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});
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});
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};
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const unlink = function() {
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return new Promise((resolve, reject) => {
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// 获取临时文件列表
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fsm.readdir({
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dirPath: wx.env.USER_DATA_PATH,
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success: (res) => {
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// 删除所有tmp_base64src开头的临时文件
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const promises = res.files
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.filter(file => file.startsWith(FILE_BASE_NAME))
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.map(file => {
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return new Promise((res, rej) => {
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fsm.unlink({
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filePath: `${wx.env.USER_DATA_PATH}/${file}`,
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success: res,
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fail: rej
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});
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});
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});
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Promise.all(promises)
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.then(resolve)
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.catch(reject);
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},
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fail: reject
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});
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});
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};
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export default {
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base64src,
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unlink,
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};
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