APP更新无法正确安装wgt

            var wgtVer = null;  

            function plusReady() {  
                // 获取本地应用资源版本号  
                plus.runtime.getProperty(plus.runtime.appid, function(inf) {  
                    wgtVer = inf.version;  
                    console.log("当前应用版本：" + wgtVer);  
                    checkUpdate();  
                });  
            }  
            if(window.plus) {  
                plusReady();  
            } else {  
                document.addEventListener('plusready', plusReady, false);  
            }  
            // 检测更新  
            var checkUrl = "http://wechat.wisdomitservices.cn/mobile/update.php";  

            function checkUpdate() {  
                plus.nativeUI.showWaiting("检测更新...");  
                var xhr = new XMLHttpRequest();  
                xhr.onreadystatechange = function() {  
                    switch(xhr.readyState) {  
                        case 4:  
                            plus.nativeUI.closeWaiting();  
                            if(xhr.status == 200) {  
                                console.log("检测更新成功：" + xhr.responseText);  
                                var newVer = xhr.responseText;  
                                if(wgtVer && newVer && (wgtVer != newVer)) {  
                                    downWgt(); // 下载升级包  
                                } else {  
                                    plus.nativeUI.toast("无新版本可更新！");  
                                }  
                            } else {  
                                console.log("检测更新失败！");  
                                plus.nativeUI.toast("检测更新失败！");  
                            }  
                            break;  
                        default:  
                            break;  
                    }  
                }  
                xhr.open('GET', checkUrl);  
                xhr.send();  
            }  
            // 下载wgt文件  
            var wgtUrl = "http://wechat.wisdomitservices.cn/mobile/update/H506EF261.wgt";  

            function downWgt() {  
                plus.nativeUI.showWaiting("下载wgt文件...");  
                plus.downloader.createDownload(wgtUrl, {  
                    filename: "_doc/update/"  
                }, function(d, status) {  
                    if(status == 200) {  
                        console.log("下载wgt成功：" + d.filename);  
                        installWgt(d.filename); // 安装wgt包  
                    } else {  
                        console.log("下载wgt失败！");  
                        plus.nativeUI.alert("下载wgt失败！");  
                    }  
                    plus.nativeUI.closeWaiting();  
                }).start();  
            }  
            // 更新应用资源  
            function installWgt(path) {  
                plus.nativeUI.showWaiting("安装wgt文件...");  
                plus.runtime.install(path, {}, function() {  
                    plus.nativeUI.closeWaiting();  
                    console.log("安装wgt文件成功！");  
                    plus.nativeUI.alert("应用资源更新完成！", function() {  
                        plus.runtime.restart();  
                    });  
                }, function(e) {  
                    plus.nativeUI.closeWaiting();  
                    console.log("安装wgt文件失败[" + e.code + "]：" + e.message);  
                    plus.nativeUI.alert("安装wgt文件失败[" + e.code + "]：" + e.message);  
                });  
            }

参考 http://cache.baiducontent.com/c?m=9d78d513d99c06f44fede53b5850c0666808dd252bd7a14668d4e200c8264c413635a3ea7d795453c7823c390ef50f1aa8e737012a1e73f6c2df883d8beacc7568de30340740d10705d36efe975b768166cb0bb7f804e4b0f0&p=882a9645d69f14f20be296204a0a93&newp=882a9645d69f52fc57efcc624f4886231610db2151d4db106b82c825d7331b001c3bbfb42323140fd4cf7b6203af435aedf03c74360421a3dda5c91d9fb4c57479d434&user=baidu&fm=sc&query=mui+wgt+not+a+zip+archive&qid=bca7487300023f53&p1=2#baidusnap5

更新时提示

安装wgt文件失败[10]：Not a zip archive