dm.7in6.com/public/assets/js/LodopFuncs.js

//==本JS是加载Lodop插件或Web打印服务CLodop/Lodop7的综合示例==
//用双端口加载主JS文件LodopFuncs.js，以防其中某端口被占:
var MainJS = "CLodopfuncs.js",
    URL_WS1 = "http://127.0.0.1:8000/" + MainJS,
    URL_WS2 = "http://127.0.0.1:18000/" + MainJS,
    URL_HTTP1 = "http://127.0.0.1:8000/" + MainJS,
    URL_HTTP2 = "http://127.0.0.1:18000/" + MainJS;

var CreatedOKLodopObject, CLodopIsLocal, LoadJsState;

//==判断是否需要CLodop(那些不支持插件的浏览器):==
function needCLodop() {
    try {
        var ua = navigator.userAgent;
        if (ua.match(/Windows\sPhone/i) ||
            ua.match(/iPhone|iPod|iPad/i) ||
            ua.match(/Android/i) ||
            ua.match(/Edge\D?\d+/i))
            return true;
        var verTrident = ua.match(/Trident\D?\d+/i);
        var verIE = ua.match(/MSIE\D?\d+/i);
        var verOPR = ua.match(/OPR\D?\d+/i);
        var verFF = ua.match(/Firefox\D?\d+/i);
        var x64 = ua.match(/x64/i);
        if ((!verTrident) && (!verIE) && (x64)) return true;
        else if (verFF) {
            verFF = verFF[0].match(/\d+/);
            if ((verFF[0] >= 41) || (x64)) return true;
        } else if (verOPR) {
            verOPR = verOPR[0].match(/\d+/);
            if (verOPR[0] >= 32) return true;
        } else if ((!verTrident) && (!verIE)) {
            var verChrome = ua.match(/Chrome\D?\d+/i);
            if (verChrome) {
                verChrome = verChrome[0].match(/\d+/);
                if (verChrome[0] >= 41) return true;
            }
        }
        return false;
    } catch (err) {
        return true;
    }
}

//==检查加载成功与否，如没成功则用http(s)再试==
function checkOrTryHttp() {
    if (window.getCLodop) {
        LoadJsState = "complete";
        return true;
    }
    if (LoadJsState == "loadingB" || LoadJsState == "complete") return;
    LoadJsState = "loadingB";
    var head = document.head || document.getElementsByTagName("head")[0] || document.documentElement;
    var JS1 = document.createElement("script")
        ,JS2 = document.createElement("script");
    JS1.src = URL_HTTP1;
    JS2.src = URL_HTTP2;

    // 添加 CORS 错误处理
    JS1.onerror = function(e) {
        console.warn("加载 CLodopfuncs.js (端口8000) 失败:", e);
        // 尝试备用端口
        head.insertBefore(JS2, head.firstChild);
    };

    JS2.onerror = function(e) {
        console.warn("加载 CLodopfuncs.js (端口18000) 失败:", e);
        LoadJsState = "complete";
        // 显示 CORS 错误提示
        if (window.location.protocol === 'http:') {
            console.warn("CORS 错误: 公共 HTTP 网站无法访问本地资源，请使用 HTTPS 或修改浏览器设置");
        }
    };

    JS1.onload = JS2.onload = function() {
        LoadJsState = "complete";
    };

    head.insertBefore(JS1,head.firstChild);
}

//==加载Lodop对象的主过程:==
(function loadCLodop(){
    if (!needCLodop()) return;
    CLodopIsLocal = !!((URL_WS1 + URL_WS2).match(/\/\/localho|\/\/127.0.0./i));
    LoadJsState = "loadingA";
    if (!window.WebSocket && window.MozWebSocket) window.WebSocket=window.MozWebSocket;

    // 直接走 HTTP 方式，不再尝试 WebSocket（HTTP 环境下 WS 必然被拦截）
    checkOrTryHttp();
})();

//==获取LODOP对象主过程,判断是否安装、需否升级:==
function getLodop(oOBJECT, oEMBED) {
    var strFontTag = "<br><font color='#FF00FF'>打印控件";
    var strLodopInstall = strFontTag + "未安装!点击这里<a href='install_lodop32.exe' target='_self'>执行安装</a>";
    var strLodopUpdate = strFontTag + "需要升级!点击这里<a href='install_lodop32.exe' target='_self'>执行升级</a>";
    var strLodop64Install = strFontTag + "未安装!点击这里<a href='install_lodop64.exe' target='_self'>执行安装</a>";
    var strLodop64Update = strFontTag + "需要升级!点击这里<a href='install_lodop64.exe' target='_self'>执行升级</a>";
    var strLodop7Install_X86 = strFontTag + "未安装!点击这里<a href='http://www.c-lodop.com/download.html' target='_blank'>执行安装</a>";
    var strLodop7Install_ARM = strFontTag + "未安装!点击这里<a href='http://www.c-lodop.com/download.html' target='_blank'>执行安装</a>";
    var strCLodopInstallA = "<br><font color='#FF00FF'>Web打印服务CLodop未安装启动，点击这里<a href='http://www.c-lodop.com/download.html' target='_blank'>下载执行安装</a>";
    var strCLodopInstallB = "<br>（若此前已安装过，可<a href='CLodop.protocol:setup' target='_self'>点这里直接再次启动</a>）";
    var strCorsError = "<br><font color='#FF0000'>成功后请刷新本页面或重启浏览器</font>";
    var strCorsSolution = "<br><font color='#0066CC'></font>";
    var strInstallOK = "</font>";
    var LODOP;
    try {
        var isWinIE = (/MSIE/i.test(navigator.userAgent)) || (/Trident/i.test(navigator.userAgent));
        var isWinIE64 = isWinIE && (/x64/i.test(navigator.userAgent));
        var isLinuxX86 = (/Linux/i.test(navigator.platform)) && (/x86/i.test(navigator.platform));
        var isLinuxARM = (/Linux/i.test(navigator.platform)) && (/aarch/i.test(navigator.platform));

        if (needCLodop() || isLinuxX86 || isLinuxARM) {
            try {
                LODOP = window.getCLodop();
            } catch (err) {}
            if (!LODOP && LoadJsState !== "complete") {
                if (!LoadJsState)
                    alert("未曾加载Lodop主JS文件，请先调用loadCLodop过程."); else
                    alert("网页还没下载完毕，请稍等一下再操作.");
                return;
            }
            var strAlertMessage;
            if (!LODOP) {
                if (isLinuxX86)
                    strAlertMessage = strLodop7Install_X86;
                else if (isLinuxARM)
                    strAlertMessage = strLodop7Install_ARM;
                else {
                    strAlertMessage = strCLodopInstallA + (CLodopIsLocal ? strCLodopInstallB : "");
                    // 添加 CORS 错误提示
                    if (window.location.protocol === 'http:') {
                        strAlertMessage += strCorsError + strCorsSolution;
                    }
                }
                document.body.innerHTML = strAlertMessage + strInstallOK + document.body.innerHTML;
                return;
            }
        } else {
            if (oOBJECT || oEMBED) {
                LODOP = isWinIE ? oOBJECT : oEMBED;
            } else if (!CreatedOKLodopObject) {
                LODOP = document.createElement("object");
                LODOP.setAttribute("width", 0);
                LODOP.setAttribute("height", 0);
                LODOP.setAttribute("style", "position:absolute;left:0px;top:-100px;width:0px;height:0px;");
                if (isWinIE)
                    LODOP.setAttribute("classid", "clsid:2105C259-1E0C-4534-8141-A753534CB4CA");
                else
                    LODOP.setAttribute("type", "application/x-print-lodop");
                document.documentElement.appendChild(LODOP);
                CreatedOKLodopObject = LODOP;
            } else
                LODOP = CreatedOKLodopObject;

            if ((!LODOP) || (!LODOP.VERSION)) {
                document.body.innerHTML = (isWinIE64 ? strLodop64Install : strLodopInstall) + strInstallOK + document.body.innerHTML;
                return LODOP;
            }
            if (LODOP.VERSION < "6.2.2.6") {
                document.body.innerHTML = (isWinIE64 ? strLodop64Update : strLodopUpdate) + strInstallOK + document.body.innerHTML;
            }
        }
        return LODOP;
    } catch (err) {
        console.error("getLodop出错:", err);
        return {
            SET_LICENSES: function(){},
            PRINT_INIT: function(){},
            SET_PRINT_STYLE: function(){},
            SET_PRINT_PAGESIZE: function(){},
            ADD_PRINT_HTM: function(){},
            PREVIEW: function(){},
            PRINT: function(){}
        };
    }
}