ness
Version:
✪ No-effort static sites deployed to your AWS account.
256 lines • 30.1 kB
JavaScript
;
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
Object.defineProperty(o, k2, { enumerable: true, get: function() { return m[k]; } });
}) : (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
o["default"] = v;
});
var __importStar = (this && this.__importStar) || function (mod) {
if (mod && mod.__esModule) return mod;
var result = {};
if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
__setModuleDefault(result, mod);
return result;
};
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.generateCsp = void 0;
const fs = __importStar(require("fs-extra"));
const path = __importStar(require("path"));
const crypto = __importStar(require("crypto"));
const url_1 = require("url");
const got_1 = __importDefault(require("got"));
const cheerio = __importStar(require("cheerio"));
const css = __importStar(require("css"));
const file_1 = require("./file");
const self = "'self'";
const https = 'https:';
const wss = 'wss:';
const defaultSrc = 'default-src';
const scriptSrc = 'script-src';
const styleSrc = 'style-src';
const fontSrc = 'font-src';
const imgSrc = 'img-src';
const childSrc = 'child-src';
const connectSrc = 'connect-src';
function isUrlSpecialProtocol(url) {
try {
const protocol = new url_1.URL(url).protocol;
return protocol && !/https?/.test(protocol);
}
catch (_a) {
return false;
}
}
function isUrlAbsolute(url) {
return url.indexOf('://') > 0 || url.indexOf('//') === 0;
}
function isUrlRelative(url) {
return !isUrlAbsolute(url);
}
function extractUrls(value) {
const re = /(?:url\(['"]?)(.*?)(?:['"]?\))/g;
const urls = [];
let match;
do {
match = re.exec(value);
if (match)
urls.push(match[1]);
} while (match);
return urls;
}
function getRelativePath(entry, url) {
return path.resolve(entry, url.replace(/^\//, ''));
}
function resolveUrl(entry, url) {
if (isUrlSpecialProtocol(url) || isUrlAbsolute(url))
return url;
return getRelativePath(entry, url);
}
async function fetchAsset(url) {
if (isUrlSpecialProtocol(url))
return undefined;
if (isUrlAbsolute(url)) {
const { body } = await (0, got_1.default)(url);
return body;
}
else {
return fs.readFile(url, 'utf-8');
}
}
/**
* Get settings from local configuration file.
*
* @param entry Path to the publish directory.
*/
async function generateCsp(entry) {
var _a;
const csp = {
[defaultSrc]: [self],
[scriptSrc]: [self],
[styleSrc]: [self],
[fontSrc]: [self],
[imgSrc]: [self, https],
[childSrc]: [https],
[connectSrc]: [https, wss],
};
const docs = await (0, file_1.walk)(entry, /\.html?$/);
const addUrl = (key, url) => {
// Handle protocols like blob: and data:
if (isUrlSpecialProtocol(url)) {
csp[key].push(new url_1.URL(url).protocol);
return;
}
// Already allowing self, so ignore relative paths
if (isUrlRelative(url))
return;
// Add absolute URL origins
csp[key].push(new url_1.URL(url).origin);
};
const processStylesheet = async (style, location) => {
var _a;
const parsed = css.parse(style);
const { rules } = parsed.stylesheet || {};
if (!rules)
return;
const imports = rules.filter((rule) => rule.type === 'import');
for (const cssImport of imports) {
const value = cssImport.import || '';
const urls = value.startsWith('url')
? extractUrls(value)
: [value.replace(/['"]+/g, '').split(' ')[0]];
for (const url of urls) {
try {
const root = url.startsWith('/') ? entry : location;
const resolvedUrl = resolveUrl(root, url);
const style = await fetchAsset(resolvedUrl);
if (style)
await processStylesheet(style, location);
}
catch (_b) { }
addUrl(styleSrc, url);
}
}
const fontFaces = rules.filter((rule) => rule.type === 'font-face');
for (const fontFace of fontFaces) {
// @ts-ignore
for (const dec of ((_a = fontFace.declarations) === null || _a === void 0 ? void 0 : _a.filter((dec) => dec.property === 'src')) || []) {
// @ts-ignore
for (const url of extractUrls(dec.value)) {
addUrl(fontSrc, url);
}
}
}
const canHaveImageUrl = [
'background',
'background-image',
'list-style',
'list-style-image',
'content',
'cursor',
'border',
'border-image',
'border-image-source',
'mask',
'mask-image',
];
const imageUrls = rules
.filter((rule) => rule)
.map((rule) => rule)
.flatMap((rule) => rule.declarations)
.filter((dec) => dec)
.map((dec) => dec)
.filter((dec) => dec.value && dec.property && canHaveImageUrl.includes(dec.property))
.flatMap((dec) => extractUrls(dec.value));
for (const imageUrl of imageUrls) {
addUrl(imgSrc, imageUrl);
}
};
for (const doc of docs) {
const contents = fs.readFileSync(doc);
const $ = cheerio.load(contents);
const dir = path.dirname(doc);
for (const element of $('script, style').toArray()) {
const isScript = element.type === 'script';
const isStyle = element.type === 'style';
const key = isScript ? scriptSrc : styleSrc;
const inline = element.children.length > 0;
if (inline) {
// @ts-ignore
const content = (_a = element.firstChild) === null || _a === void 0 ? void 0 : _a.data;
const hash = crypto.createHash('sha256').update(content).digest('base64');
csp[key].push(`'sha256-${hash}'`);
if (isStyle) {
await processStylesheet(content, dir);
}
continue;
}
const { src } = element.attribs;
if (isStyle) {
try {
const root = src.startsWith('/') ? entry : dir;
const resolvedUrl = resolveUrl(root, src);
const style = await fetchAsset(resolvedUrl);
if (style)
await processStylesheet(style, path.dirname(resolvedUrl));
}
catch (_b) { }
}
else if (isScript && isUrlAbsolute(src) && !element.attribs['integrity']) {
// Generate SRI hashes for external scripts
const content = await fetchAsset(src);
if (content) {
const hash = crypto.createHash('sha384').update(content).digest('base64');
element.attribs['integrity'] = `sha384-${hash}`;
element.attribs['crossorigin'] = 'anonymous';
}
}
addUrl(key, src);
}
for (const element of $('*').toArray()) {
const style = element.attribs['style'];
if (style) {
const hash = crypto.createHash('sha256').update(style).digest('base64');
csp[styleSrc].push("'unsafe-hashes'");
csp[styleSrc].push(`'sha256-${hash}'`);
}
}
for (const link of $('link').toArray()) {
if (link.attribs['as'] !== 'stylesheet')
continue;
const { href } = link.attribs;
try {
const root = href.startsWith('/') ? entry : dir;
const resolvedUrl = resolveUrl(root, href);
const style = await fetchAsset(resolvedUrl);
if (style)
await processStylesheet(style, path.dirname(resolvedUrl));
}
catch (_c) { }
addUrl(styleSrc, href);
}
for (const image of $('img').toArray()) {
const { src } = image.attribs;
addUrl(imgSrc, src);
}
for (const frame of $('frame, iframe').toArray()) {
const { src } = frame.attribs;
addUrl(childSrc, src);
}
fs.writeFileSync(doc, $.html());
}
return Object.keys(csp)
.filter((key) => csp[key].length > 0)
.map((key) => `${key} ${[...new Set(csp[key])].join(' ')}`)
.join('; ');
}
exports.generateCsp = generateCsp;
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* as fs from 'fs-extra'\nimport * as path from 'path'\nimport * as crypto from 'crypto'\nimport {URL} from 'url'\n\nimport got from 'got'\nimport * as cheerio from 'cheerio'\nimport * as css from 'css'\n\nimport {walk} from './file'\n\nconst self = \"'self'\"\nconst https = 'https:'\nconst wss = 'wss:'\n\nconst defaultSrc = 'default-src'\nconst scriptSrc = 'script-src'\nconst styleSrc = 'style-src'\nconst fontSrc = 'font-src'\nconst imgSrc = 'img-src'\nconst childSrc = 'child-src'\nconst connectSrc = 'connect-src'\n\nfunction isUrlSpecialProtocol(url: string) {\n  try {\n    const protocol = new URL(url).protocol\n    return protocol && !/https?/.test(protocol)\n  } catch {\n    return false\n  }\n}\n\nfunction isUrlAbsolute(url: string) {\n  return url.indexOf('://') > 0 || url.indexOf('//') === 0\n}\n\nfunction isUrlRelative(url: string) {\n  return !isUrlAbsolute(url)\n}\n\nfunction extractUrls(value: string) {\n  const re = /(?:url\\(['\"]?)(.*?)(?:['\"]?\\))/g\n  const urls = []\n\n  let match\n\n  do {\n    match = re.exec(value)\n    if (match) urls.push(match[1])\n  } while (match)\n\n  return urls\n}\n\nfunction getRelativePath(entry: string, url: string) {\n  return path.resolve(entry, url.replace(/^\\//, ''))\n}\n\nfunction resolveUrl(entry: string, url: string): string {\n  if (isUrlSpecialProtocol(url) || isUrlAbsolute(url)) return url\n\n  return getRelativePath(entry, url)\n}\n\nasync function fetchAsset(url: string): Promise<string | undefined> {\n  if (isUrlSpecialProtocol(url)) return undefined\n\n  if (isUrlAbsolute(url)) {\n    const {body} = await got(url)\n    return body\n  } else {\n    return fs.readFile(url, 'utf-8')\n  }\n}\n\n/**\n * Get settings from local configuration file.\n *\n * @param entry Path to the publish directory.\n */\nexport async function generateCsp(entry: string): Promise<string> {\n  const csp: Record<string, Array<string>> = {\n    [defaultSrc]: [self],\n    [scriptSrc]: [self],\n    [styleSrc]: [self],\n    [fontSrc]: [self],\n    [imgSrc]: [self, https],\n    [childSrc]: [https],\n    [connectSrc]: [https, wss],\n  }\n\n  const docs = await walk(entry, /\\.html?$/)\n\n  const addUrl = (key: string, url: string) => {\n    // Handle protocols like blob: and data:\n    if (isUrlSpecialProtocol(url)) {\n      csp[key].push(new URL(url).protocol)\n      return\n    }\n\n    // Already allowing self, so ignore relative paths\n    if (isUrlRelative(url)) return\n\n    // Add absolute URL origins\n    csp[key].push(new URL(url).origin)\n  }\n\n  const processStylesheet = async (style: string, location: string): Promise<void> => {\n    const parsed = css.parse(style)\n    const {rules} = parsed.stylesheet || {}\n    if (!rules) return\n\n    const imports: css.Import[] = rules.filter((rule) => rule.type === 'import')\n    for (const cssImport of imports) {\n      const value = cssImport.import || ''\n      const urls = value.startsWith('url')\n        ? extractUrls(value)\n        : [value.replace(/['\"]+/g, '').split(' ')[0]]\n\n      for (const url of urls) {\n        try {\n          const root = url.startsWith('/') ? entry : location\n          const resolvedUrl = resolveUrl(root, url)\n          const style = await fetchAsset(resolvedUrl)\n          if (style) await processStylesheet(style, location)\n        } catch {}\n\n        addUrl(styleSrc, url)\n      }\n    }\n\n    const fontFaces: css.FontFace[] = rules.filter((rule) => rule.type === 'font-face')\n    for (const fontFace of fontFaces) {\n      // @ts-ignore\n      for (const dec of fontFace.declarations?.filter((dec) => dec.property === 'src') || []) {\n        // @ts-ignore\n        for (const url of extractUrls(dec.value)) {\n          addUrl(fontSrc, url)\n        }\n      }\n    }\n\n    const canHaveImageUrl = [\n      'background',\n      'background-image',\n      'list-style',\n      'list-style-image',\n      'content',\n      'cursor',\n      'border',\n      'border-image',\n      'border-image-source',\n      'mask',\n      'mask-image',\n    ]\n\n    const imageUrls = rules\n      .filter((rule) => rule as css.Rule)\n      .map((rule) => rule as css.Rule)\n      .flatMap((rule) => rule.declarations)\n      .filter((dec) => dec as css.Declaration)\n      .map((dec) => dec as css.Declaration)\n      .filter((dec) => dec.value && dec.property && canHaveImageUrl.includes(dec.property))\n      .flatMap((dec) => extractUrls(dec.value!))\n\n    for (const imageUrl of imageUrls) {\n      addUrl(imgSrc, imageUrl)\n    }\n  }\n\n  for (const doc of docs) {\n    const contents = fs.readFileSync(doc)\n    const $ = cheerio.load(contents)\n    const dir = path.dirname(doc)\n\n    for (const element of $('script, style').toArray()) {\n      const isScript = element.type === 'script'\n      const isStyle = element.type === 'style'\n      const key = isScript ? scriptSrc : styleSrc\n\n      const inline = element.children.length > 0\n      if (inline) {\n        // @ts-ignore\n        const content = element.firstChild?.data\n        const hash = crypto.createHash('sha256').update(content).digest('base64')\n        csp[key].push(`'sha256-${hash}'`)\n\n        if (isStyle) {\n          await processStylesheet(content, dir)\n        }\n\n        continue\n      }\n\n      const {src} = element.attribs\n\n      if (isStyle) {\n        try {\n          const root = src.startsWith('/') ? entry : dir\n          const resolvedUrl = resolveUrl(root, src)\n          const style = await fetchAsset(resolvedUrl)\n          if (style) await processStylesheet(style, path.dirname(resolvedUrl))\n        } catch {}\n      } else if (isScript && isUrlAbsolute(src) && !element.attribs['integrity']) {\n        // Generate SRI hashes for external scripts\n        const content = await fetchAsset(src)\n        if (content) {\n          const hash = crypto.createHash('sha384').update(content).digest('base64')\n          element.attribs['integrity'] = `sha384-${hash}`\n          element.attribs['crossorigin'] = 'anonymous'\n        }\n      }\n\n      addUrl(key, src)\n    }\n\n    for (const element of $('*').toArray()) {\n      const style = element.attribs['style']\n      if (style) {\n        const hash = crypto.createHash('sha256').update(style).digest('base64')\n        csp[styleSrc].push(\"'unsafe-hashes'\")\n        csp[styleSrc].push(`'sha256-${hash}'`)\n      }\n    }\n\n    for (const link of $('link').toArray()) {\n      if (link.attribs['as'] !== 'stylesheet') continue\n\n      const {href} = link.attribs\n      try {\n        const root = href.startsWith('/') ? entry : dir\n        const resolvedUrl = resolveUrl(root, href)\n        const style = await fetchAsset(resolvedUrl)\n        if (style) await processStylesheet(style, path.dirname(resolvedUrl))\n      } catch {}\n\n      addUrl(styleSrc, href)\n    }\n\n    for (const image of $('img').toArray()) {\n      const {src} = image.attribs\n      addUrl(imgSrc, src)\n    }\n\n    for (const frame of $('frame, iframe').toArray()) {\n      const {src} = frame.attribs\n      addUrl(childSrc, src)\n    }\n\n    fs.writeFileSync(doc, $.html())\n  }\n\n  return Object.keys(csp)\n    .filter((key) => csp[key].length > 0)\n    .map((key) => `${key} ${[...new Set(csp[key])].join(' ')}`)\n    .join('; ')\n}\n"]}