如何设置Web Workers的内容安全策略以在Edge / Safari中工作?

Sea*_*lly 5 javascript web-worker content-security-policy nginx-config

我一直在找回错误代码:18,尝试使用Web Worker时来自Edge和Safari的SecurityError。但是,在Firefox / Chrome中,工作人员很好。我正在使用传递零依赖数据处理函数的内联工作器。

我的CSP看起来:

add_header Content-Security-Policy "default-src 'self'; worker-src 'self' 'inline' *.example.com";
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我可以自己添加其他不错的东西,例如本地样式表和googleapis.com,但我很好奇如何使Worker不会引发安全错误

工作者方法的摘录

// Create an "inline" worker (1:1 at definition time)
    const worker = new Worker(
        // Use a data URI for the worker's src. It inlines the target function and an RPC handler:
        'data:,$$='+asyncFunction+';onmessage='+(e => {
            /* global $$ */

            // Invoking within then() captures exceptions in the supplied async function as rejections
            Promise.resolve(e.data[1]).then(
                v => $$.apply($$, v)
            ).then(
                // success handler - callback(id, SUCCESS(0), result)
                // if `d` is transferable transfer zero-copy
                d => {
                    postMessage([e.data[0], 0, d], [d].filter(x => (
                        (x instanceof ArrayBuffer) ||
                        (x instanceof MessagePort) ||
                        (x instanceof ImageBitmap)
                    )));
                },
                // error handler - callback(id, ERROR(1), error)
                er => { postMessage([e.data[0], 1, '' + er]); }
            );
        })
    );
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Edge为工作者抛出此错误:

  [object DOMException]: {code: 18, message: "SecurityError", name: 
    "SecurityError"}
    code: 18
    message: "SecurityError"
    name: "SecurityError"
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Gar*_*son 1

我不确定为什么数据 url 会导致安全错误,但您可以使用它URL.createObjectURL来加载工作脚本,该脚本似乎在 Edge 中正常工作(我没有在 safari 中测试它)。

看起来是这样的:

// Create the worker script as a string
const script = '$$='+asyncFunction+';onmessage='+(e => {
        /* global $$ */

        // Invoking within then() captures exceptions in the supplied async function as rejections
        Promise.resolve(e.data[1]).then(
            v => $$.apply($$, v)
        ).then(
            // success handler - callback(id, SUCCESS(0), result)
            // if `d` is transferable transfer zero-copy
            d => {
                postMessage([e.data[0], 0, d], [d].filter(x => (
                    (x instanceof ArrayBuffer) ||
                    (x instanceof MessagePort) ||
                    (x instanceof ImageBitmap)
                )));
            },
            // error handler - callback(id, ERROR(1), error)
            er => { postMessage([e.data[0], 1, '' + er]); }
        );
    });

// Create a local url to load the worker
const blob = new Blob([script]);
const workerUrl = URL.createObjectURL(blob);
const worker = new Worker(workerUrl);
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如果您需要任何说明,请告诉我!