Split App.vue

src/component/upload.vue

@@ -0,0 +1,82 @@
+<template>
+    <el-upload
+            :auto-upload="false"
+            :on-change="handleFile"
+            :show-file-list="false"
+            action=""
+            drag
+            multiple>
+        <i class="el-icon-upload"/>
+        <div class="el-upload__text">将文件拖到此处，或<em>点击选择</em></div>
+        <div class="el-upload__tip" slot="tip">本工具仅在浏览器内对文件进行解锁，无需消耗流量</div>
+    </el-upload>
+</template>
+
+<script>
+    "use strict";// 严格模式 用于尾调用优化
+
+    export default {
+        name: "upload",
+        data() {
+            return {
+                cacheQueue: [],
+                workers: [],
+                idle_workers: [],
+                thread_num: 1
+            }
+        },
+        mounted() {
+            if (document.location.host !== "") {
+                //todo: Fail on Hot Reload
+                const worker = require("workerize-loader!../decrypt/common");
+                this.thread_num = navigator.hardwareConcurrency || 1;
+                for (let i = 0; i < this.thread_num; i++) {
+                    // noinspection JSValidateTypes,JSUnresolvedVariable
+                    this.workers.push(worker().CommonDecrypt);
+                    this.idle_workers.push(i);
+                }
+            } else {
+                const dec = require('../decrypt/common');
+                this.workers.push(dec.CommonDecrypt);
+                this.idle_workers.push(0)
+            }
+        },
+        methods: {
+            handleFile(file) {
+                // 有空闲worker 立刻处理文件
+                if (this.idle_workers.length > 0) {
+                    this.handleDoFile(file, this.idle_workers.shift());
+                }
+                // 无空闲worker 则放入缓存队列
+                else {
+                    this.cacheQueue.push(file);
+                }
+            },
+            handleCacheQueue(worker_id) {
+                // 调用方法消费缓存队列中的数据
+                if (this.cacheQueue.length === 0) {
+                    this.idle_workers.push(worker_id);
+                    return
+                }
+                this.handleDoFile(this.cacheQueue.shift(), worker_id);
+            },
+            handleDoFile(file, worker_id) {
+                this.workers[worker_id](file).then(data => {
+                    this.$emit("handle_finish", data);
+                    // 完成之后 执行新任务 todo: 可能导致call stack过长
+                    this.handleCacheQueue(worker_id);
+                }).catch(err => {
+                    this.$emit("handle_error", err, file.name);
+                    this.handleCacheQueue(worker_id);
+                })
+            },
+        }
+    }
+</script>
+
+<style scoped>
+    /*noinspection CssUnusedSymbol*/
+    .el-upload-dragger {
+        width: 80vw !important;
+    }
+</style>