Getting error while setting the content-security-policy using Angular4

问题

I am getting the following error while setting the content-security-policy using Angular4.

Error:

Refused to connect to 'ws://localhost:4200/sockjs-node/812/lxo2oeas/websocket' because it violates the following Content Security Policy directive: "default-src 'self' 'unsafe-eval'". Note that 'connect-src' was not explicitly set, so 'default-src' is used as a fallback.

Uncaught TypeError: event.data.indexOf is not a function at receiveMessage (out.js:4)

Here is my code:

<!doctype html>
<html lang="en">
<head>
  <meta http-equiv="Content-Security-Policy" 
    content="default-src 'self' 'unsafe-eval';
      style-src 'self' 'unsafe-inline';
      script-src 'self' http://localhost:4200 'unsafe-inline' 'unsafe-eval';">
  <meta charset="utf-8">
  <title>Myapp</title>
  <base href="/">

  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link rel="icon" type="image/x-icon" href="favicon.ico">
</head>
<body>
  <app-root></app-root>
</body>
</html>

Here I need to set the content-security-policy but getting those error.

回答1:

You need to explicitly indicate that ws: source expressions are allowed.

So either change your meta element to have this:

<meta http-equiv="Content-Security-Policy" 
  content="default-src 'self' 'unsafe-eval';
  style-src 'self' 'unsafe-inline';
  script-src 'self' http://localhost:4200 'unsafe-inline' 'unsafe-eval';
  connect-src ws:">

…that is, add a connect-src directive with a ws: source expression.

Or else do this:

<meta http-equiv="Content-Security-Policy" 
  content="default-src 'self' 'unsafe-eval' ws:;
  style-src 'self' 'unsafe-inline';
  script-src 'self' http://localhost:4200 'unsafe-inline' 'unsafe-eval';">

…that is, add the ws: source expression to your existing default-src directive.

来源：https://stackoverflow.com/questions/49233988/getting-error-while-setting-the-content-security-policy-using-angular4

标签

angular

content-security-policy