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nodeJS - where exactly can I put the Content Security Policy

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梦谈多话
梦谈多话 2021-01-04 04:27

I don\'t know where to apply the Content Security Policy (CSP) snippet below in my code;

Content-Security-Policy: script-src \'self\' https://apis.google.com
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3条回答
  • 梦谈多话
    2021-01-04 05:04

    You just need to set it in the HTTP Header, not the HTML. This is a working example with express 4 with a static server:

    var express = require('express');
var app = express();


app.use(function(req, res, next) {
    res.setHeader("Content-Security-Policy", "script-src 'self' https://apis.google.com");
    return next();
});

app.use(express.static(__dirname + '/'));

app.listen(process.env.PORT || 3000);

    If you want more information about CSP, this is an excelent article: http://www.html5rocks.com/en/tutorials/security/content-security-policy/

    Hope that helps!

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  • 情歌与酒
    2021-01-04 05:20

    For a node.js application without using any external framework e.g. express:

    const http = require('http');

http.createServer((request, response) => {

    request.on('error', (err) => {
        console.error(err);

    // for this simple example I am not including the data event
    // e.g. if the request contains data in the body

    }).on('end', () => {

       response.on('error', (err) => {
           console.error(err);
       });

      // you can set your headers with setHeader or 
      // use writeHead as a "shortcut" to include the statusCode. 
      // Note writeHead won't cache results internally
      // and if used in conjuction with setHeader will take some sort of "precedence"

      response.writeHead(200, {
          "Content-Security-Policy": "default-src 'self'"

           // other security headers here...
      });

      response.end("<html><body><h1>Hello, Security Headers!</h1></body></html>");

  });
}).listen(8080);

    See the node.js documentation for more details on setting headers on the response object

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  • 猫巷女王i
    2021-01-04 05:22

    If you are using Express, I suggest taking a look at helmet. In addition to increased options & flexibility (handling CSP violations, nonces...etc), there are a lot of inconsistencies in how browsers implement CSP. Helmet looks at the user-agent of the browser and sets the appropriate header and value for that browser. If no user-agent is matched, it will set all the headers with the 2.0 spec.

    // Make sure you run "npm install helmet-csp" to get the csp package.
const csp = require('helmet-csp')

app.use(csp({
  directives: {
    defaultSrc: ["'self'"],
    styleSrc: ["'self'", 'maxcdn.bootstrapcdn.com']
  }
}))
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