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Add security headers for static and dynamic resources

This commit is contained in:
David Evans 2021-10-23 15:28:21 +01:00
parent 106dec5db5
commit 57cfe939f7
2 changed files with 34 additions and 1 deletions
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26
bin/server.js
View File

@ -33,9 +33,24 @@ function devMapper(file, type, data) {
const STATIC_MAX_AGE = 10 * 60; // 10 minutes const STATIC_MAX_AGE = 10 * 60; // 10 minutes
const RENDER_MAX_AGE = 60 * 60 * 24 * 7; // 1 week const RENDER_MAX_AGE = 60 * 60 * 24 * 7; // 1 week
const SKETCH_CSS_SHA = 'sha256-s7UPtBgvov5WNF9C1DlTZDpqwLgEmfiWha5a5p/Zn7E=';
const statics = new StaticRequestHandler('') const statics = new StaticRequestHandler('')
.setCacheMaxAge(DEV ? 0 : STATIC_MAX_AGE) .setCacheMaxAge(DEV ? 0 : STATIC_MAX_AGE)
.addHeader('Content-Security-Policy', [
'base-uri \'self\'',
'default-src \'none\'',
'script-src \'self\' https://unpkg.com',
`style-src 'self' '${SKETCH_CSS_SHA}'`,
'connect-src \'self\'',
'font-src \'self\' data:',
'img-src \'self\' blob:',
'form-action \'none\'',
'frame-ancestors \'none\'',
].join('; '))
.addHeader('X-Content-Type-Options', 'nosniff')
.addHeader('X-Frame-Options', 'DENY')
.addHeader('X-XSS-Protection', '1; mode=block')
.addMimeType('txt', 'text/plain; charset=utf-8') .addMimeType('txt', 'text/plain; charset=utf-8')
.addMimeType('htm', 'text/html; charset=utf-8') .addMimeType('htm', 'text/html; charset=utf-8')
.addMimeType('html', 'text/html; charset=utf-8') .addMimeType('html', 'text/html; charset=utf-8')
@ -70,7 +85,16 @@ if(DEV) {
const render = new RenderRequestHandler('/render') const render = new RenderRequestHandler('/render')
.setCacheMaxAge(DEV ? 0 : RENDER_MAX_AGE) .setCacheMaxAge(DEV ? 0 : RENDER_MAX_AGE)
.setCrossOrigin(true); .setCrossOrigin(true)
.addHeader('Content-Security-Policy', [
'base-uri \'self\'',
'default-src \'none\'',
`style-src '${SKETCH_CSS_SHA}'`,
'connect-src \'none\'',
'font-src data:',
'form-action \'none\'',
].join('; '))
.addHeader('X-Content-Type-Options', 'nosniff');
new Server() new Server()
.addHandler(render) .addHandler(render)

9
bin/server/RequestHandler.js
View File

@ -5,6 +5,7 @@ class RequestHandler {
this.handleFn = handleFn; this.handleFn = handleFn;
this.cacheMaxAge = 0; this.cacheMaxAge = 0;
this.allowAllOrigins = false; this.allowAllOrigins = false;
this.staticHeaders = [];
this.info = `Custom handler at ${this.method} ${this.matcher}`; this.info = `Custom handler at ${this.method} ${this.matcher}`;
} }
@ -18,6 +19,11 @@ class RequestHandler {
return this; return this;
} }
addHeader(name, value) {
this.staticHeaders.push({ name, value });
return this;
}
applyCommonHeaders(req, res) { applyCommonHeaders(req, res) {
if(this.allowAllOrigins) { if(this.allowAllOrigins) {
res.setHeader('Access-Control-Allow-Origin', '*'); res.setHeader('Access-Control-Allow-Origin', '*');
@ -28,6 +34,9 @@ class RequestHandler {
`public, max-age=${this.cacheMaxAge}` `public, max-age=${this.cacheMaxAge}`
); );
} }
for(const header of this.staticHeaders) {
res.setHeader(header.name, header.value);
}
} }
apply(req, res, info) { apply(req, res, info) {