环球实时：vue实战：打印小票的实现方法

lodop地址: http://www.c-lodop.com/download.html

//==本JS是加载Lodop插件或Web打印服务CLodop/Lodop7的综合示例，可直接使用，建议理解后融入自己程序==//用双端口加载主JS文件Lodop.js(或CLodopfuncs.js兼容老版本)以防其中某端口被占:var  MainJS  =  "CLodopfuncs.js", URL_WS1  =  "ws://localhost:8000/"  +  MainJS,                //ws用8000/18000 URL_WS2  =  "ws://localhost:18000/"  +  MainJS, URL_HTTP1  =  "http://localhost:8000/"  +  MainJS,              //http用8000/18000 URL_HTTP2  =  "http://localhost:18000/"  +  MainJS, URL_HTTP3  =  "https://localhost.lodop.net:8443/"  +  MainJS; //https用8000/8443var  CreatedOKLodopObject, CLodopIsLocal, LoadJsState;//==判断是否需要CLodop(那些不支持插件的浏览器):==export  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==//==低版本CLODOP6.561/Lodop7.043及前)用本方法==export  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"), JS3  =  document.createElement("script"); JS1.src  =  URL_HTTP1; JS2.src  =  URL_HTTP2; JS3.src  =  URL_HTTP3; JS1.onload  =  JS2.onload  =  JS3.onload  =  JS2.onerror  =  JS3.onerror  =  function () { LoadJsState  =  "complete"; } JS1.onerror  =  function (e) { if (window.location.protocol  !==  "https:") head.insertBefore(JS2, head.firstChild); else head.insertBefore(JS3, head.firstChild);    } 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; //ws方式速度快(小于200ms)且可避免CORS错误,但要求Lodop版本足够新: try { var  WSK1  =  new  WebSocket(URL_WS1); WSK1.onopen  =  function (e) { setTimeout("checkOrTryHttp();", 200); } WSK1.onmessage  =  function (e) { if (!window.getCLodop) eval(e.data); } WSK1.onerror  =  function (e) { var  WSK2  =  new  WebSocket(URL_WS2); WSK2.onopen  =  function (e) { setTimeout("checkOrTryHttp();", 200); } WSK2.onmessage  =  function (e) { if (!window.getCLodop) eval(e.data); } WSK2.onerror  =  function (e) { checkOrTryHttp(); }        }} catch (e) { checkOrTryHttp();    }})();//==获取LODOP对象主过程,判断是否安装、需否升级:==export  function  getLodop(oOBJECT, oEMBED) { var  strFontTag  =  "
打印控件"; var  strLodopInstall  =  strFontTag  +  "未安装!点击这里执行安装"; var  strLodopUpdate  =  strFontTag  +  "需要升级!点击这里执行升级"; var  strLodop64Install  =  strFontTag  +  "未安装!点击这里执行安装"; var  strLodop64Update  =  strFontTag  +  "需要升级!点击这里执行升级"; var  strCLodopInstallA  =  "
Web打印服务CLodop未安装启动，点击这里下载执行安装"; var  strCLodopInstallB  =  "
（若此前已安装过，可点这里直接再次启动）"; var  strCLodopUpdate  =  "
Web打印服务CLodop需升级!点击这里执行升级"; var  strLodop7FontTag  =  "
Web打印服务Lodop7"; var  strLodop7HrefX86  =  "点击这里下载安装(下载后解压，点击lodop文件开始执行)"; var  strLodop7HrefARM  =  "点击这里下载安装(下载后解压，点击lodop文件开始执行)"; var  strLodop7Install_X86  =  strLodop7FontTag  +  "未安装启动，"  +  strLodop7HrefX86; var  strLodop7Install_ARM  =  strLodop7FontTag  +  "未安装启动，"  +  strLodop7HrefARM; var  strLodop7Update_X86  =  strLodop7FontTag  +  "需升级，"  +  strLodop7HrefX86; var  strLodop7Update_ARM  =  strLodop7FontTag  +  "需升级，"  +  strLodop7HrefARM; var  strInstallOK  =  "，成功后请刷新本页面或重启浏览器。"; 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  :  ""); document.body.innerHTML = strAlertMessage + strInstallOK + document.body.innerHTML; return;} else { if (isLinuxX86  &&  LODOP.CVERSION <  "7.0.4.3") strAlertMessage  =  strLodop7Update_X86; else  if (isLinuxARM  &&  LODOP.CVERSION <  "7.0.4.3") strAlertMessage  =  strLodop7Update_ARM; else  if (CLODOP.CVERSION <  "6.5.7.0") strAlertMessage  =  strCLodopUpdate; if (strAlertMessage) document.body.innerHTML  =  strAlertMessage  +  strInstallOK  +  document.body.innerHTML;            }} else { //==如果页面有Lodop插件就直接使用,否则新建:== if (oOBJECT  ||  oEMBED) { if (isWinIE) LODOP  = oOBJECT; else LODOP  =  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; //==Lodop插件未安装时提示下载地址:== 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;            }        } //===如下空白位置适合调用统一功能(如注册语句、语言选择等):======================= //=============================================================================== return  LODOP;} catch (err) { alert("getLodop出错:"  +  err);    }}