121 lines
3.0 KiB
TypeScript
121 lines
3.0 KiB
TypeScript
// @ts-nocheck
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// #ifdef APP-PLUS
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import { getLocalFilePath } from '../getLocalFilePath'
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// #endif
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function isImage(extension : string) {
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const imageExtensions = ["jpg", "jpeg", "png", "gif", "bmp", "svg"];
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return imageExtensions.includes(extension.toLowerCase());
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}
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// #ifdef H5
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function getSVGFromURL(url: string) {
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return new Promise((resolve, reject) => {
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const xhr = new XMLHttpRequest();
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xhr.open('GET', url, true);
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xhr.responseType = 'text';
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xhr.onload = function () {
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if (xhr.status === 200) {
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const svg = xhr.responseText;
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resolve(svg);
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} else {
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reject(new Error(xhr.statusText));
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}
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};
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xhr.onerror = function () {
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reject(new Error('Network error'));
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};
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xhr.send();
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});
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}
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// #endif
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/**
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* 路径转base64
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* @param {Object} string
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*/
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export function pathToBase64(path : string) : Promise<string> {
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if (/^data:/.test(path)) return path
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let extension = path.substring(path.lastIndexOf('.') + 1);
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const isImageFile = isImage(extension)
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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 new Promise((resolve, reject) => {
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// #ifdef H5
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if (isImageFile) {
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if(extension == 'svg') {
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getSVGFromURL(path).then(svg => {
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const base64 = btoa(svg);
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resolve(`data:image/svg+xml;base64,${base64}`);
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})
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} else {
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let image = new Image();
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image.setAttribute("crossOrigin", 'Anonymous');
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image.onload = function () {
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let canvas = document.createElement('canvas');
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canvas.width = this.naturalWidth;
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canvas.height = this.naturalHeight;
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canvas.getContext('2d').drawImage(image, 0, 0);
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let result = canvas.toDataURL(`${prefix}${extension}`)
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resolve(result);
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canvas.height = canvas.width = 0
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}
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image.src = path + '?v=' + Math.random()
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image.onerror = (error) => {
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reject(error);
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};
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}
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} else {
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reject('not image');
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}
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// #endif
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// #ifdef MP
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if (uni.canIUse('getFileSystemManager')) {
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uni.getFileSystemManager().readFile({
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filePath: path,
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encoding: 'base64',
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success: (res) => {
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resolve(`data:${prefix}${extension};base64,${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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}
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// #endif
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// #ifdef APP-PLUS
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plus.io.resolveLocalFileSystemURL(getLocalFilePath(path), (entry) => {
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entry.file((file : any) => {
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const fileReader = new plus.io.FileReader()
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fileReader.onload = (data) => {
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resolve(data.target.result)
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}
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fileReader.onerror = (error) => {
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console.error({ error, path })
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reject(error)
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}
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fileReader.readAsDataURL(file)
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}, reject)
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}, reject)
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// #endif
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})
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} |