110 lines
2.6 KiB
Plaintext
110 lines
2.6 KiB
Plaintext
// @ts-nocheck
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// fileToBase64, fileToDataURL,dataURLToFile
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export function fileToBase64(filePath : string) {
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return new Promise((resolve, reject)=>{
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if(uni.canIUse('getFileSystemManager')){
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uni.getFileSystemManager().readFile({
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filePath: path,
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encoding: 'base64',
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success: (res) => {
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resolve(res.data)
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},
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fail: (error) => {
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console.error({ error, path })
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reject(error)
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}
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})
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} else {
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reject('fileToBase64：环境不支持')
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}
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})
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}
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export function fileToDataURL(filePath : string) {
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let extension = path.substring(path.lastIndexOf('.') + 1);
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const imageExtensions = ["jpg", "jpeg", "png", "gif", "bmp", "svg"];
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const isImageFile = imageExtensions.includes(extension.toLowerCase());
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let prefix = ''
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if (isImageFile) {
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prefix = 'image/';
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if(extension == 'svg') {
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extension += '+xml'
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}
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} else if (extension === 'pdf') {
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prefix = 'application/pdf';
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} else if (extension === 'txt') {
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prefix = 'text/plain';
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} else {
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// 添加更多文件类型的判断
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// 如果不是图片、PDF、文本等类型，可以设定默认的前缀或采取其他处理
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prefix = 'application/octet-stream';
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}
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return fileToBase64(filePath).then(res => `data:${prefix}${extension};base64,${res}`)
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}
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function getFileExtensionFromDataURL(dataURL : string) : string {
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const commaIndex = dataURL.indexOf(",");
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const mimeType = dataURL.substring(0, commaIndex).replace("data:", "").replace(";base64", "");
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const mimeTypeParts = mimeType.split("/");
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return mimeTypeParts[1];
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}
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function getPlatform():Uni {
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// #ifdef MP-WEIXIN
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return wx
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// #endif
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// #ifdef MP-BAIDU
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return swan
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// #endif
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// #ifdef MP-ALIPAY
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return my
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// #endif
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// #ifdef MP-JD
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return jd
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// #endif
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// #ifdef MP-QQ
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return qq
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// #endif
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// #ifdef MP-360
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return qh
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// #endif
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// #ifdef MP-KUAISHOU
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return ks
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// #endif
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// #ifdef MP-LARK||MP-TOUTIAO
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return tt
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// #endif
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// #ifdef MP-DINGTALK
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return dd
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// #endif
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// #ifdef QUICKAPP-WEBVIEW || QUICKAPP-WEBVIEW-UNION || QUICKAPP-WEBVIEW-HUAWEI
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return qa
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// #endif
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return uni
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}
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export function dataURLToFile(dataURL : string, filename : NullableString = null) {
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return new Promise((resolve, reject) => {
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const name = filename ?? `${Date.now()}.${getFileExtensionFromDataURL(dataURL)}`;
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const commaIndex = dataURL.indexOf(",");
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const base64 = dataURL.substring(commaIndex + 1);
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const platform = getPlatform()
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const filePath = `${platform.env.USER_DATA_PATH}/${name}`;
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fs.writeFile({
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filePath,
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data: base64,
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encoding: 'base64',
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success() {
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resolve(filePath)
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},
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fail(err) {
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reject(err)
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}
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})
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})
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} |