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content-security-policy-builder

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content-security-policy-builder

Build Content Security Policy directives.

  • 2.2.0
  • latest
  • Source
  • npm
  • Socket score

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What is content-security-policy-builder?

The content-security-policy-builder npm package is a utility for building Content Security Policy (CSP) headers in a structured and programmatic way. It helps developers create CSP headers by providing a simple API to define various directives and their values.

What are content-security-policy-builder's main functionalities?

Basic CSP Header Construction

This feature allows you to construct a basic CSP header by specifying directives and their sources. The example demonstrates how to create a policy that allows scripts and styles from 'self' and 'example.com'.

const cspBuilder = require('content-security-policy-builder');
const policy = cspBuilder({
  directives: {
    defaultSrc: ['self'],
    scriptSrc: ['self', 'example.com'],
    styleSrc: ['self', 'example.com']
  }
});
console.log(policy); // Outputs: "default-src 'self'; script-src 'self' example.com; style-src 'self' example.com"

Adding Nonce Values

This feature allows you to add nonce values to your CSP directives, which can be used to allow specific inline scripts or styles. The example shows how to add a nonce value to the scriptSrc and styleSrc directives.

const cspBuilder = require('content-security-policy-builder');
const policy = cspBuilder({
  directives: {
    scriptSrc: ['self', 'nonce-2726c7f26c'],
    styleSrc: ['self', 'nonce-2726c7f26c']
  }
});
console.log(policy); // Outputs: "script-src 'self' 'nonce-2726c7f26c'; style-src 'self' 'nonce-2726c7f26c'"

Report URI

This feature allows you to specify a URI where CSP violation reports should be sent. The example demonstrates how to set up a report URI directive.

const cspBuilder = require('content-security-policy-builder');
const policy = cspBuilder({
  directives: {
    defaultSrc: ['self'],
    reportUri: ['/csp-report-endpoint']
  }
});
console.log(policy); // Outputs: "default-src 'self'; report-uri /csp-report-endpoint"

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Package last updated on 25 Apr 2024

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