hn_cloud_web/smz-web/js/filePreviewNew.js

var Base64 = {
    _keyStr: "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=",
    encode: function (e) {
        var t = "";
        var n, r, i, s, o, u, a;
        var f = 0;
        e = Base64._utf8_encode(e);
        while (f < e.length) {
            n = e.charCodeAt(f++);
            r = e.charCodeAt(f++);
            i = e.charCodeAt(f++);
            s = n >> 2;
            o = (n & 3) << 4 | r >> 4;
            u = (r & 15) << 2 | i >> 6;
            a = i & 63;
            if (isNaN(r)) {
                u = a = 64
            } else if (isNaN(i)) {
                a = 64
            }
            t = t + this._keyStr.charAt(s) + this._keyStr.charAt(o) + this._keyStr.charAt(u) + this._keyStr.charAt(a)
        }
        return t
    },
    decode: function (e) {
        var t = "";
        var n, r, i;
        var s, o, u, a;
        var f = 0;
        e = e.replace(/[^A-Za-z0-9+/=]/g, "");
        while (f < e.length) {
            s = this._keyStr.indexOf(e.charAt(f++));
            o = this._keyStr.indexOf(e.charAt(f++));
            u = this._keyStr.indexOf(e.charAt(f++));
            a = this._keyStr.indexOf(e.charAt(f++));
            n = s << 2 | o >> 4;
            r = (o & 15) << 4 | u >> 2;
            i = (u & 3) << 6 | a;
            t = t + String.fromCharCode(n);
            if (u != 64) {
                t = t + String.fromCharCode(r)
            }
            if (a != 64) {
                t = t + String.fromCharCode(i)
            }
        }
        t = Base64._utf8_decode(t);
        return t
    },
    _utf8_encode: function (e) {
        e = e.replace(/rn/g, "n");
        var t = "";
        for (var n = 0; n < e.length; n++) {
            var r = e.charCodeAt(n);
            if (r < 128) {
                t += String.fromCharCode(r)
            } else if (r > 127 && r < 2048) {
                t += String.fromCharCode(r >> 6 | 192);
                t += String.fromCharCode(r & 63 | 128)
            } else {
                t += String.fromCharCode(r >> 12 | 224);
                t += String.fromCharCode(r >> 6 & 63 | 128);
                t += String.fromCharCode(r & 63 | 128)
            }
        }
        return t
    },
    _utf8_decode: function (e) {
        var t = "";
        var n = 0;
        var r = c1 = c2 = 0;
        while (n < e.length) {
            r = e.charCodeAt(n);
            if (r < 128) {
                t += String.fromCharCode(r);
                n++
            } else if (r > 191 && r < 224) {
                c2 = e.charCodeAt(n + 1);
                t += String.fromCharCode((r & 31) << 6 | c2 & 63);
                n += 2
            } else {
                c2 = e.charCodeAt(n + 1);
                c3 = e.charCodeAt(n + 2);
                t += String.fromCharCode((r & 15) << 12 | (c2 & 63) << 6 | c3 & 63);
                n += 3
            }
        }
        return t
    }
}

//文件预览
var currentHostname = window.location.hostname;
let filePreviewUrl = "http://192.168.0.14:8012/onlinePreview?url="; //公司测试地址 文件预览的地址
// let filePreviewUrl = "http://116.63.172.211:8012/onlinePreview?url="; //线上正式环境--外网
// let filePreviewUrl = "http://172.16.0.235:8012/onlinePreview?url="; //线上正式环境--内网
// let filePreviewUrl = "http://140.210.209.102:8012/onlinePreview?url="; //部署上线地址 文件预览的地址
var fileUrl ="http://192.168.0.14:19118/hnBmw";  //公司测试地址
// var fileUrl ="http://116.63.172.211:1918/hnBmw";  //线上正式环境--外网
// var fileUrl ="http://172.16.0.235:1918/hnBmw";  //线上正式环境--内网
// var fileUrl ="http://140.210.209.102:1918/hnBmw"; //部署上线地址
// let filePreviewUrl = "http://" + currentHostname + ":8012/onlinePreview?url=";
function filePreview(url) {
    let path;
    if (~url.indexOf("http")) {
        path = url;
    } else {
        path = fileUrl + url;
    }
    console.log("url:", path);
    let fileToken = generateToken();
    var filePath = filePreviewUrl + encodeURIComponent(Base64.encode(path))+"&token=" + fileToken;
    console.log("url+token:", filePath);
    window.open(filePath);
}

function updateFileViewTime() {
    var fileId  = localStorage.getItem("fileId");
    $.ajax({
        type: 'POST',
        async: true, // 默认异步true,false表示同步
        url: smz_ht_url + "/salaryFile/updateFileViewTime", // 请求地址
        // contentType: "application/json; charset=utf-8",
        contentType: "application/x-www-form-urlencoded",
        dataType: 'json', // 服务器返回数据类型
        data: {
            fileId: fileId,
        } , //获取提交的表单字段
        success: function (data) {

        },
        error: function (XMLHttpRequest, textStatus, e) {
            top.layer.close(loadingMsg);
            layer.msg('数据请求发生异常,请稍后重试', {icon: 16, scrollbar: false});
        }
    });
}

/**
 * 获取 blob
 * @param  {String} url 目标文件地址
 * @return {Promise}
 */
function getBlob(url) {
    return new Promise(resolve => {
        const xhr = new XMLHttpRequest();
        xhr.open('GET', url, true);
        xhr.responseType = 'blob';
        xhr.onload = () => {
            if (xhr.status === 200) {
                resolve(xhr.response);
            }
        };

        xhr.send();
    });
}

/**
 * 保存
 * @param  {Blob} blob
 * @param  {String} filename 想要保存的文件名称
 */
function saveAs(blob, filename) {
    if (window.navigator.msSaveOrOpenBlob) {
        navigator.msSaveBlob(blob, filename);
    } else {
        const link = document.createElement('a');
        const body = document.querySelector('body');
        link.href = window.URL.createObjectURL(blob);
        link.download = filename;

        // fix Firefox
        link.style.display = 'none';
        body.appendChild(link);

        link.click();
        body.removeChild(link);

        window.URL.revokeObjectURL(link.href);
    }
}

/**
 * 下载
 * @param  {String} url 目标文件地址
 * @param  {String} filename 想要保存的文件名称
 */
function download(url, filename) {
    getBlob(url).then(blob => {
        saveAs(blob, filename);
    });
}