一，插入注册表 1，新建一个.reg文件，内容为如下
```
[HKEY_CLASSES_ROOT\aTest]
@="aTest Protocol"
"URL Protocol"=""
[HKEY_CLASSES_ROOT\aTest\DefaultIcon]
@="C:\Program Files (x86)'.exe的文件路径主要用\\路径'"
[HKEY_CLASSES_ROOT\aTest\shell]
@=""
[HKEY_CLASSES_ROOT\aTest\shell\open]
@=""
[HKEY_CLASSES_ROOT\aTest\shell\open\command]
@=""C:\Program Files (x86)'.exe\'的文件路径主要用\\路径''" "
路径配置好以后双击，就将这个内容插入到了注册表里面，注意一定要，去注册表的根目录去检查是否有这个注册表
并查看aTest/shell/open/command目录中的默认是否有值，如果没有则将.exe文件目录放到数据表头的第一行
二，引入protocolcheck.js
```
(function (f) {
if (typeof exports === "object" && typeof module !== "undefined") {
module.exports = f();
} else if (typeof define === "function" && define.amd) {
define([], f);
} else {
var g;
if (typeof window !== "undefined") {
g = window;
} else if (typeof global !== "undefined") {
g = global;
} else if (typeof self !== "undefined") {
g = self;
} else {
g = this;
}
g.protocolCheck = f();
}
})(function () {
var define, module, exports;
return (function e(t, n, r) {
function s(o, u) {
if (!n[o]) {
if (!t[o]) {
var a = typeof require == "function" && require;
if (!u && a) return a(o, !0);
if (i) return i(o, !0);
var f = new Error("Cannot find module '" + o + "'");
throw ((f.code = "MODULE_NOT_FOUND"), f);
}
var l = (n[o] = { exports: {} });
t[o][0].call(
l.exports,
function (e) {
var n = t[o][1][e];
return s(n ? n : e);
},
l,
l.exports,
e,
t,
n,
r
);
}
return n[o].exports;
}
var i = typeof require == "function" && require;
for (var o = 0; o < r.length; o++) s(r[o]);
return s;
})(
{
1: [
function (require, module, exports) {
function _registerEvent(target, eventType, cb) {
if (target.addEventListener) {
target.addEventListener(eventType, cb);
return {
remove: function () {
target.removeEventListener(eventType, cb);
},
};
} else {
target.attachEvent(eventType, cb);
return {
remove: function () {
target.detachEvent(eventType, cb);
},
};
}
}
function _createHiddenIframe(target, uri) {
var iframe = document.createElement("iframe");
iframe.src = uri;
iframe.id = "hiddenIframe";
iframe.style.display = "none";
target.appendChild(iframe);
return iframe;
}
function openUriWithHiddenFrame(uri, failCb, successCb) {
var timeout = setTimeout(function () {
failCb();
handler.remove();
}, 1000);
var iframe = document.querySelector("#hiddenIframe");
if (!iframe) {
iframe = _createHiddenIframe(document.body, "about:blank");
}
var handler = _registerEvent(window, "blur", onBlur);
function onBlur() {
clearTimeout(timeout);
handler.remove();
successCb();
}
iframe.contentWindow.location.href = uri;
}
function openUriWithTimeoutHack(uri, failCb, successCb) {
var timeout = setTimeout(function () {
failCb();
handler.remove();
}, 1000);
//handle page running in an iframe (blur must be registered with top level window)
var target = window;
while (target != target.parent) {
target = target.parent;
}
var handler = _registerEvent(target, "blur", onBlur);
function onBlur() {
clearTimeout(timeout);
handler.remove();
successCb();
}
window.location = uri;
}
function openUriUsingFirefox(uri, failCb, successCb) {
var iframe = document.querySelector("#hiddenIframe");
if (!iframe) {
iframe = _createHiddenIframe(document.body, "about:blank");
}
try {
iframe.contentWindow.location.href = uri;
successCb();
} catch (e) {
if (e.name == "NS_ERROR_UNKNOWN_PROTOCOL") {
failCb();
}
}
}
function openUriUsingIEInOlderWindows(uri, failCb, successCb) {
if (getInternetExplorerVersion() === 10) {
openUriUsingIE10InWindows7(uri, failCb, successCb);
} else if (
getInternetExplorerVersion() === 9 ||
getInternetExplorerVersion() === 11
) {
openUriWithHiddenFrame(uri, failCb, successCb);
} else {
openUriInNewWindowHack(uri, failCb, successCb);
}
}
function openUriUsingIE10InWindows7(uri, failCb, successCb) {
var timeout = setTimeout(failCb, 1000);
window.addEventListener("blur", function () {
clearTimeout(timeout);
successCb();
});
var iframe = document.querySelector("#hiddenIframe");
if (!iframe) {
iframe = _createHiddenIframe(document.body, "about:blank");
}
try {
iframe.contentWindow.location.href = uri;
} catch (e) {
failCb();
clearTimeout(timeout);
}
}
function openUriInNewWindowHack(uri, failCb, successCb) {
var myWindow = window.open("", "", "width=0,height=0");
myWindow.document.write("<iframe src='" + uri + "'></iframe>");
setTimeout(function () {
try {
myWindow.location.href;
myWindow.setTimeout("window.close()", 1000);
successCb();
} catch (e) {
myWindow.close();
failCb();
}
}, 1000);
}
function openUriWithMsLaunchUri(uri, failCb, successCb) {
navigator.msLaunchUri(uri, successCb, failCb);
}
function checkBrowser() {
var isOpera =
!!window.opera || navigator.userAgent.indexOf(" OPR/") >= 0;
var ua = navigator.userAgent.toLowerCase();
return {
isOpera: isOpera,
isFirefox: typeof InstallTrigger !== "undefined",
isSafari:
(~ua.indexOf("safari") && !~ua.indexOf("chrome")) ||
Object.prototype.toString
.call(window.HTMLElement)
.indexOf("Constructor") > 0,
isIOS:
/iPad|iPhone|iPod/.test(navigator.userAgent) &&
!window.MSStream,
isChrome: !!window.chrome && !isOpera,
isIE: /*@cc_on!@*/ false || !!document.documentMode, // At least IE6
};
}
function getInternetExplorerVersion() {
var rv = -1;
if (navigator.appName === "Microsoft Internet Explorer") {
var ua = navigator.userAgent;
var re = new RegExp("MSIE ([0-9]{1,}[.0-9]{0,})");
if (re.exec(ua) != null) rv = parseFloat(RegExp.$1);
} else if (navigator.appName === "Netscape") {
var ua = navigator.userAgent;
var re = new RegExp("Trident/.*rv:([0-9]{1,}[.0-9]{0,})");
if (re.exec(ua) != null) {
rv = parseFloat(RegExp.$1);
}
}
return rv;
}
module.exports = function (uri, failCb, successCb, unsupportedCb) {
function failCallback() {
failCb && failCb();
}
function successCallback() {
successCb && successCb();
}
if (navigator.msLaunchUri) {
//for IE and Edge in Win 8 and Win 10
openUriWithMsLaunchUri(uri, failCb, successCb);
} else {
var browser = checkBrowser();
if (browser.isFirefox) {
openUriUsingFirefox(uri, failCallback, successCallback);
} else if (browser.isChrome || browser.isIOS) {
openUriWithTimeoutHack(uri, failCallback, successCallback);
} else if (browser.isIE) {
openUriUsingIEInOlderWindows(
uri,
failCallback,
successCallback
);
} else if (browser.isSafari) {
openUriWithHiddenFrame(uri, failCallback, successCallback);
} else {
unsupportedCb();
//not supported, implement please
}
}
};
},
{},
],
},
{},
[1]
)(1);
});
将这个文件在index.html中引入
<script src="%PUBLIC_URL%/static/protocolcheck.js"></script>
在点击跳转的时候做判断如下
window.protocolCheck(
'aTest://',
() => {
const isDownLoad = window.confirm("没有监测到该应用，是否下载");
if(isDownLoad) {
const aLink = document.createElement("a")
aLink.href="下载地址"
aLink.target='_blank'
aLink.click();
aLink.remove();
}
},
() => {
window.location.href = "aTest://"
}
)
完成以上两步就能在网页端打开电脑app了
