DeNet/demo/utils/tool.js

function arrayBufferToString(buffer) {
    return new Uint8Array(buffer).toString()
}

function stringToArrayBuffer(str) {
    return new Uint8Array(str.split(',')).buffer
}

// file 切片
function localFileSlice(file = null, callback) {
    let blobSlice = File.prototype.slice || File.prototype.mozSlice ||
        File.prototype.webkitSlice,
        chunkSize = 1024 * 1024, // Read in chunks of 1MB
        chunks = Math.ceil(file.size / chunkSize),
        currentChunk = 0,
        fileReader = new FileReader(),
        result = []

    fileReader.onload = function (e) {
        result.push(e.target.result);
        currentChunk++;

        if (currentChunk < chunks) {
            loadNext();
        } else {
            callback && callback(result);
        }
    };

    fileReader.onerror = function () {
        console.error('文件读取失败');
        callback && callback('');
    };

    function loadNext() {
        let start = currentChunk * chunkSize,
            end = ((start + chunkSize) >= file.size) ? file.size : start + chunkSize;
        fileReader.readAsArrayBuffer(blobSlice.call(file, start, end));
    }

    loadNext();
}


// file md5
function localFileToMD5(file = null, callback) {
    let blobSlice = File.prototype.slice || File.prototype.mozSlice ||
        File.prototype.webkitSlice,
        chunkSize = 1024 * 1024 * 2, // Read in chunks of 2MB
        chunks = Math.ceil(file.size / chunkSize),
        currentChunk = 0,
        fileReader = new FileReader(),
        spark = new SparkMD5.ArrayBuffer()

    fileReader.onload = function (e) {
        spark.append(e.target.result);
        currentChunk++;

        if (currentChunk < chunks) {
            loadNext();
        } else {
            //获取md5
            let md5 = spark.end();
            callback && callback(md5);
        }
    };

    fileReader.onerror = function () {
        console.error('文件读取失败');
        callback && callback('');
    };

    function loadNext() {
        let start = currentChunk * chunkSize,
            end = ((start + chunkSize) >= file.size) ? file.size : start + chunkSize;

        fileReader.readAsArrayBuffer(blobSlice.call(file, start, end));
    }

    loadNext();
}




function formateTime(time) {
    const h = parseInt(time / 3600)
    const minute = parseInt(time / 60 % 60)
    const second = Math.ceil(time % 60)    

    const hours = h < 10 ? '0' + h : h
    const formatSecond = second > 59 ? 59 : second
    return `${hours > 0 ? `${hours}:` : ''}${minute < 10 ? '0' + minute : minute}:${formatSecond < 10 ? '0' + formatSecond : formatSecond}`
}

function updateConfig(){
    axios({
        method: 'get',
        url: 'http://art-weapp.oss-cn-hangzhou.aliyuncs.com/chromeExtension/config.json',
    })
    .then(function (response) {
        let result = response.data
        chrome.storage.sync.get({ config: '' }, (item) => {
            if (!item.config) {
                chrome.storage.sync.set({ config: JSON.stringify(res) });
                return
            }

            let config = JSON.parse(item.config)
            if (config.version != result.version) {
                chrome.storage.sync.set({ config: JSON.stringify(result) });
            }
        });
    });
}