我正在使用 karma 和 jasmine 进行我的一个小项目。我的目标浏览器是 chrome 32。

我正在尝试在我通过 blob 实例化的 web worker 中导入脚本，如下所示:

describeAsyncAppliPersephone("When the application project to DOM", function()
{
    it("it should call the function of DomProjection in the project associated with its event", function()
    {
        var eventSentBack = {
            eventType: 'testReceived',
            headers: { id: 14, version: 4 },
            payLoad: { textChanged: 'newText' }
        };
        var isRendered = false;
        var fnProjection = function(event, payload)
        {
            isRendered = true;
        }

        var bootstrap = [
            { eventType: 'testReceived', projection: fnProjection },
            { eventType: 'test2Received', projection: function() { } }
        ];

        runs(function()
        {
            var factory = new WorkerFactory();

        var worker = factory.CreateByScripts('importScripts("/base/SiteWeb/project/js/app/application.js"); var app = new application(self); app.projectOnDOM(' + JSON.stringify(eventSentBack) + '); ');

            console.log(worker.WorkerLocation);

            var applicationQueue = new queueAsync(worker);
            var projectQueue = new queueSync(worker);
            var p = new project(applicationQueue, persephoneQueue, bootstrap);

            applicationQueue.publish(eventSentBack);
        });

        waitsFor(function() { return isRendered }, "Projection called", 500);

        runs(function()
        {
            expect(isRendered).toBe(true);
        });


    });
});

workerFactory 如下:

this.CreateByScripts = function(scripts, fDefListener, fOnError)
    {
        var arrayScripts = scripts;

        if (!arrayScripts)
            throw "unable to load worker for undefined scripts";

        if (Object.prototype.toString.call(arrayScripts) !== '[object Array]')
            arrayScripts = [arrayScripts];

        var blob = new Blob(arrayScripts, { type: "text/javascript" });

        var w = createWorker(window.URL.createObjectURL(blob));

        return new QueryableWorker(w, fDefListener, fOnError);
    }

createWorker 在哪里:

createWorker = function(sUrl)
        {
            return new Worker(sUrl);
        }

但是 importScripts 抛出以下错误:

Uncaught SyntaxError: Failed to execute 'importScripts': the URL '/base/SiteWeb/project/js/app/application.js' is invalid.

我试过浏览器中的路径:

http://mylocalhost:9876/base/SiteWeb/project/js/app/application.js

而且效果很好。

要使 importScripts 成功运行，我应该使用什么路径？

谢谢，

最佳答案

您不能在使用 Blob 创建的 worker 中使用相对路径。

今天遇到了这个问题。 "The Basics of Web Workers" 中解释了解决方案, 但在文章的长度上有点隐藏:

The reason being: the worker (now created from a blob URL) will be resolved with a blob: prefix, while your app will be running from a different (presumably http://) scheme. Hence, the failure will be due to cross origin restrictions.

如果您决心避免在您的工作人员中对域名进行硬编码，那么本文也提供了解决方案。在收到以 URL 作为其参数之一的消息时导入脚本:

self.onmessage = function(e) {
    importScripts(e.data.url + 'yourscript.js');
};

并开始您的工作人员发送该 url

worker.postMessage({url: document.location.protocol + '//' + document.location.host});

为清楚起见，简化了上面的代码。

关于javascript - 在 karma 环境中的 Blob 中使用 importsScripts，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/22172426/