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在Javascript中进行跨浏览器Flash检测

javascriptflashcross-browser
97

有没有可靠的跨IE/Firefox浏览器工作的脚本示例，可以检测浏览器是否能够显示嵌入式Flash内容。我说可靠是因为我知道这不是始终可能实现的100％。

我看到你已经接受了Joeri的答案，但你真的应该认真考虑swfObject。它更加强大且不那么臃肿。 - matt lohkamp
16个回答
3

你觉得呢：

var hasFlash = function() {
    var flash = false;
    try{
        if(new ActiveXObject('ShockwaveFlash.ShockwaveFlash')){
            flash=true;
        }
    }catch(e){
        if(navigator.mimeTypes ['application/x-shockwave-flash'] !== undefined){
            flash=true;
        }
    }
    return flash;
};
2

如果您对纯JavaScript解决方案感兴趣，这是我从Brett复制的一个：

function detectflash(){
    if (navigator.plugins != null && navigator.plugins.length > 0){
        return navigator.plugins["Shockwave Flash"] && true;
    }
    if(~navigator.userAgent.toLowerCase().indexOf("webtv")){
        return true;
    }
    if(~navigator.appVersion.indexOf("MSIE") && !~navigator.userAgent.indexOf("Opera")){
        try{
            return new ActiveXObject("ShockwaveFlash.ShockwaveFlash") && true;
        } catch(e){}
    }
    return false;
}
1
如果你只是想检查Flash是否已启用，这应该就足够了。
function testFlash() {

    var support = false;

    //IE only
    if("ActiveXObject" in window) {

        try{
            support = !!(new ActiveXObject("ShockwaveFlash.ShockwaveFlash"));
        }catch(e){
            support = false;
        }

    //W3C, better support in legacy browser
    } else {

        support = !!navigator.mimeTypes['application/x-shockwave-flash'];

    }

    return support;

}

注意：避免检查enabledPlugin，一些移动浏览器具有点击启用Flash插件的功能，这将导致假阴性。
0
0
使用Google Closure编译器goog.require('goog.userAgent.flash')库，我创建了这两个函数。 boolean hasFlash() 返回浏览器是否具有Flash。
function hasFlash(){
    var b = !1;
    function c(a) {if (a = a.match(/[\d]+/g)) {a.length = 3;}}
    (function() {
    if (navigator.plugins && navigator.plugins.length) {
        var a = navigator.plugins["Shockwave Flash"];
        if (a && (b = !0, a.description)) {c(a.description);return;}
        if (navigator.plugins["Shockwave Flash 2.0"]) {b = !0;return;}
    }
    if (navigator.mimeTypes && navigator.mimeTypes.length && (a = navigator.mimeTypes["application/x-shockwave-flash"], b = !(!a || !a.enabledPlugin))) {c(a.enabledPlugin.description);return;}
    if ("undefined" != typeof ActiveXObject) {
        try {
            var d = new ActiveXObject("ShockwaveFlash.ShockwaveFlash.7");b = !0;c(d.GetVariable("$version"));return;
        } catch (e) {}
        try {
            d = new ActiveXObject("ShockwaveFlash.ShockwaveFlash.6");b = !0;
            return;
        } catch (e) {}
        try {
            d = new ActiveXObject("ShockwaveFlash.ShockwaveFlash"), b = !0, c(d.GetVariable("$version"));
        } catch (e) {}
    }
    })();
    return b;
}

boolean isFlashVersion(version)

返回 Flash 版本是否大于提供的版本

function isFlashVersion(version) {
    var e = String.prototype.trim ? function(a) {return a.trim()} : function(a) {return /^[\s\xa0]*([\s\S]*?)[\s\xa0]*$/.exec(a)[1]};
    function f(a, b) {return a < b ? -1 : a > b ? 1 : 0};
    var h = !1,l = "";
    function m(a) {a = a.match(/[\d]+/g);if (!a) {return ""}a.length = 3;return a.join(".")}
    (function() {
        if (navigator.plugins && navigator.plugins.length) {
            var a = navigator.plugins["Shockwave Flash"];
            if (a && (h = !0, a.description)) {l = m(a.description);return}
            if (navigator.plugins["Shockwave Flash 2.0"]) {h = !0;l = "2.0.0.11";return}
        }
        if (navigator.mimeTypes && navigator.mimeTypes.length && (a = navigator.mimeTypes["application/x-shockwave-flash"], h = !(!a || !a.enabledPlugin))) {l = m(a.enabledPlugin.description);return}
        if ("undefined" != typeof ActiveXObject) {
            try {
                var b = new ActiveXObject("ShockwaveFlash.ShockwaveFlash.7");h = !0;l = m(b.GetVariable("$version"));return
            } catch (g) {}
            try {
                b = new ActiveXObject("ShockwaveFlash.ShockwaveFlash.6");h = !0;l = "6.0.21";return
            } catch (g) {}
            try {
                b = new ActiveXObject("ShockwaveFlash.ShockwaveFlash"), h = !0, l = m(b.GetVariable("$version"))
            } catch (g) {}
        }
    })();
    var n = l;
    return (function(a) {
        var b = 0,g = e(String(n)).split(".");
        a = e(String(a)).split(".");
        for (var p = Math.max(g.length, a.length), k = 0; 0 == b && k < p; k++) {
            var c = g[k] || "",d = a[k] || "";
            do {
                c = /(\d*)(\D*)(.*)/.exec(c) || ["", "", "", ""];d = /(\d*)(\D*)(.*)/.exec(d) || ["", "", "", ""];
                if (0 == c[0].length && 0 == d[0].length) {break}
                b = f(0 == c[1].length ? 0 : parseInt(c[1], 10), 0 == d[1].length ? 0 : parseInt(d[1], 10)) || f(0 == c[2].length, 0 == d[2].length) || f(c[2], d[2]);c = c[3];d = d[3]
            } while (0 == b);
        }
        return 0 <= b
    })(version)
}
0

已创建了一个小的.swf文件进行重定向。如果浏览器启用了Flash，则会进行重定向。

package com.play48.modules.standalone.util;

import flash.net.URLRequest;


class Redirect {


static function main() {

    flash.Lib.getURL(new URLRequest("http://play48.com/flash.html"), "_self");

}

}
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