filecache

util/index.js

@@ -3,6 +3,10 @@
 import base from '@/common/config';
 //import store from "@/store";
 import IMSDK from "openim-uniapp-polyfill";
+
+import md5 from "md5";
+
+import {downloadFile} from "@/uni_modules/network-manage";
 const isString = (v)=> {
 	return typeof v === 'string' || v instanceof String;
 },
@@ -160,14 +164,14 @@ const scan = ()=>{
 
 const fileExsit = async(fn)=>{
 	return await new Promise((resolve) => {
-		plus.io.resolveLocalFileSystemURL("_doc/"+fn, function(entry) {
+		plus.io.resolveLocalFileSystemURL(fn, function(entry) {
 			resolve(true); 
 		}, function() { 
 			resolve(false); 
 		});
 	})
 }
-const downloadFile = (url, savepath, successCb, errorCb, progressCb) => {
+const downloadFile1 = (url, savepath, successCb, errorCb, progressCb) => {
 	const root_dir = "_doc/";
 	if (!url) {
 		errorCb && errorCb.call(this,new Error('empty url'));
@@ -223,20 +227,100 @@ const downloadFile = (url, savepath, successCb, errorCb, progressCb) => {
 		startDownload();
 	});
 }
-const cacheFile = async (url, savepath, successCb, errorCb, progressCb) => {
-	//plus.downloader.clear();
-	//return ;
-	const coverExists = await fileExsit(savepath);
-	if(coverExists){
-		successCb && successCb.call(this,"_doc/"+savepath);
-	}else{
-		downloadFile(url, savepath, successCb, errorCb, progressCb)
-	}
+
+const get_absolute_path = (fn)=>{
+	return plus.io.convertLocalFileSystemURL(fn);
 }
+const pendingDownloads = new Map();
+const cacheFile = (url, saveDir,progressCallback) => {
+	let cacheDir = plus.io.convertLocalFileSystemURL(`_doc/{{dir}}/{{key}}.{{ext}}`);
+	cacheDir = cacheDir.replace('apps/'+plus.runtime.appid+'/doc','cache');
+    return new Promise(async (resolve, reject) => {
+        try {
+			if(!url || !url.startsWith('http')){
+                resolve(url);
+                return;
+			}
+            const key = md5(url);
+			var ext = "png"
+			if(url.toLowerCase().indexOf('.mp4')!==-1){
+				ext = "mp4";
+			}
+            const cacheFilePath = cacheDir.replace('{{dir}}',saveDir)
+				.replace('{{key}}',key)
+				.replace('{{ext}}',ext);
+
+			//console.error('cacheDir:',cacheDir);
+            // 如果缓存存在且文件存在，直接返回缓存路径
+            if (cacheFilePath) {
+				//console.error('cacheFilePath:', cacheFilePath);
+                const coverExists = await fileExsit(cacheFilePath);
+				//console.log("coverExists：" ,coverExists);
+                if (coverExists) {
+					//console.log("已缓存为：" , cacheFilePath,url);
+                    resolve(cacheFilePath);
+                    return;
+                }
+            }
+
+			// 2. 检查是否已经有相同的 URL 正在下载
+			if (pendingDownloads.has(url)) {
+				// 如果已经有相同的下载在进行，则添加到等待列表
+				pendingDownloads.get(url).promises.push({ resolve, reject });
+				return;
+			}
+
+
+			// 3. 如果没有正在下载，则创建新的下载任务
+			pendingDownloads.set(url, {
+				promises: [{ resolve, reject }],
+				completed: false,
+				savedPath: saveDir
+			});
+
+			// 4. 开始下载文件
+			const task = downloadFile({
+				url:url,
+				timeout: 30000,
+				filePath:cacheFilePath,
+				success(res) {
+					// 下载成功，解决所有等待的 Promise
+					const info = pendingDownloads.get(url);
+					if (info) {
+						info.completed = true;
+						info.promises.forEach(p => p.resolve(res.tempFilePath));
+						pendingDownloads.delete(url);
+					}
+				},
+				fail(e){
+					// 下载失败，拒绝所有等待的 Promise
+					const info = pendingDownloads.get(url);
+					if (info) {
+						info.promises.forEach(p => p.reject(error));
+						pendingDownloads.delete(url);
+					}
+				},
+				complate(){
+					task = null;
+				}
+			});
+			//console.error('task:', task);
+			task.onProgressUpdate(({progress,totalBytesWritten,totalBytesExpectedToWrite})=>{
+				//console.error('pres:', progress,totalBytesWritten,totalBytesExpectedToWrite);
+				progressCallback && progressCallback.call(this,progress,totalBytesWritten,totalBytesExpectedToWrite)
+			});
+        } catch (error) {
+            console.error('cacheFile 发生错误:', error);
+            resolve(url); // 返回原始URL作为fallback
+        }
+    });
+};
+
 export default{
-	fileExsit,
-	downloadFile,
 	cacheFile,
+	fileExsit,
+    get_absolute_path,
+	downloadFile,
 	isString :isString,
 	isNumber :isNumber,
 	isInteger :isInteger,
@@ -258,7 +342,10 @@ export default{
 		v= v || ""; 
 		v = v.replace(/\\/ig,"/").replace('/\/\/ig',"/");
 		//console.log(v);
-		if(isString(v)){
+		if(v && isString(v)){
+			if(v.startsWith('//')){
+				return 'http:'+v;
+			}
 			if(v.startsWith('blob:') || v.startsWith('file://') || v.startsWith('http')){
 				return v;
 			}