如果安装Adobe Reader的JavaScript检测

本文介绍了如果安装Adobe Reader的JavaScript检测的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我们有一些PDF表单在非Adobe PDF阅读器，显示不正确（即WebKit的内置PDF阅读器不正常显示一些专有的Adobe的东西）。我们想检测时，用户不用的安装了Adobe的的PDF阅读器，并给他们一个小小的警告，但我有一个很难搞清楚如何做到这一点在2014年。

We have some PDF forms that don't display correctly in non-Adobe PDF readers (i.e. WebKit's built-in PDF reader does not properly display some proprietary Adobe things). We want to detect when users don't have Adobe's PDF Reader installed and give them a little warning, but I'm having a hard time figuring out how to do it in 2014.

看来这个剧本在2011年工作基本上它遍历 navigator.plugins 并查找插件名为安装Adobe Acrobat 或 Chrome浏览器PDF阅读器。

It seems this script worked in 2011. Basically it loops through navigator.plugins and looks for plugins with the name Adobe Acrobat or Chrome PDF Viewer.

 for(key in navigator.plugins) {
      var plugin = navigator.plugins[key];
      if(plugin.name == "Adobe Acrobat") return plugin;
 }

闪存进到今天，Adobe公司必须改变一些东西，因为我已经安装使用Adobe Acrobat，但它似乎并没有在 navigator.plugins ！现在哪里是它，我怎么发现的呢？

Flash forward to today, Adobe must have changed something, because I have Adobe Acrobat installed, but it doesn't seem to be in navigator.plugins! Where is it now and how do I detect it?

推荐答案

好吧，我已经更新了脚本，它的工作完全没有在所有浏览器都：

Ok I've updated the script and it's working perfectly fine in all browsers now:

<!DOCTYPE HTML>
<html>
    <head>
        <title> New Document </title>
        <script>
        //
        // http://thecodeabode.blogspot.com
        // @author: Ben Kitzelman
        // @license: FreeBSD: (http://opensource.org/licenses/BSD-2-Clause) Do whatever you like with it
        // @updated: 03-03-2013
        //
        var getAcrobatInfo = function() {

            var getBrowserName = function() {
                return this.name = this.name || function() {
                    var userAgent = navigator ? navigator.userAgent.toLowerCase() : "other";

                    if(userAgent.indexOf("chrome") > -1){
                        return "chrome";
                    } else if(userAgent.indexOf("safari") > -1){
                        return "safari";
                    } else if(userAgent.indexOf("msie") > -1 || navigator.appVersion.indexOf('Trident/') > 0){
                        return "ie";
                    } else if(userAgent.indexOf("firefox") > -1){
                        return "firefox";
                    } else {
                        //return "ie";
                        return userAgent;
                    }
                }();
            };

            var getActiveXObject = function(name) {
                try { return new ActiveXObject(name); } catch(e) {}
            };

            var getNavigatorPlugin = function(name) {
                for(key in navigator.plugins) {
                    var plugin = navigator.plugins[key];
                    if(plugin.name == name) return plugin;
                }
            };

            var getPDFPlugin = function() {
                return this.plugin = this.plugin || function() {
                    if(getBrowserName() == 'ie') {
                        //
                        // load the activeX control
                        // AcroPDF.PDF is used by version 7 and later
                        // PDF.PdfCtrl is used by version 6 and earlier
                        return getActiveXObject('AcroPDF.PDF') || getActiveXObject('PDF.PdfCtrl');
                    } else {
                        return getNavigatorPlugin('Adobe Acrobat') || getNavigatorPlugin('Chrome PDF Viewer') || getNavigatorPlugin('WebKit built-in PDF');
                    }
                }();
            };

            var isAcrobatInstalled = function() {
                return !!getPDFPlugin();
            };

            var getAcrobatVersion = function() {
                try {
                    var plugin = getPDFPlugin();

                    if(getBrowserName() == 'ie') {
                        var versions = plugin.GetVersions().split(',');
                        var latest = versions[0].split('=');
                        return parseFloat(latest[1]);
                    }

                    if(plugin.version) return parseInt(plugin.version);
                    return plugin.name
                }
                catch(e) {
                    return null;
                }
            }

            //
            // The returned object
            //
            return {
                browser: getBrowserName(),
                acrobat: isAcrobatInstalled() ? 'installed' : false,
                acrobatVersion: getAcrobatVersion()
            };
        };

        var info = getAcrobatInfo();
        alert(info.browser+ " " + info.acrobat + " " + info.acrobatVersion);
  </script>
 </head>

 <body>

 </body>
</html>

这篇关于如果安装Adobe Reader的JavaScript检测的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！