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joplin/ReactNativeClient/lib/urlUtils.js
2019-09-19 22:51:18 +01:00

95 lines
2.6 KiB
JavaScript

const { rtrimSlashes } = require('lib/path-utils');
const { urlDecode } = require('lib/string-utils');
const urlUtils = {};
urlUtils.hash = function(url) {
const s = url.split('#');
if (s.length <= 1) return '';
return s[s.length - 1];
};
urlUtils.urlWithoutPath = function(url) {
const parsed = require('url').parse(url, true);
return `${parsed.protocol}//${parsed.host}`;
};
urlUtils.urlProtocol = function(url) {
if (!url) return '';
const parsed = require('url').parse(url, true);
return parsed.protocol;
};
urlUtils.prependBaseUrl = function(url, baseUrl) {
baseUrl = rtrimSlashes(baseUrl).trim(); // All the code below assumes that the baseUrl does not end up with a slash
url = url.trim();
if (!url) url = '';
if (!baseUrl) return url;
if (url.indexOf('#') === 0) return url; // Don't prepend if it's a local anchor
if (urlUtils.urlProtocol(url)) return url; // Don't prepend the base URL if the URL already has a scheme
if (url.length >= 2 && url.indexOf('//') === 0) {
// If it starts with // it's a protcol-relative URL
return urlUtils.urlProtocol(baseUrl) + url;
} else if (url && url[0] === '/') {
// If it starts with a slash, it's an absolute URL so it should be relative to the domain (and not to the full baseUrl)
return urlUtils.urlWithoutPath(baseUrl) + url;
} else {
return baseUrl + (url ? `/${url}` : '');
}
};
const resourceRegex = /^(joplin:\/\/|:\/)([0-9a-zA-Z]{32})(|#[^\s]*)(|\s".*?")$/;
urlUtils.isResourceUrl = function(url) {
return !!url.match(resourceRegex);
};
urlUtils.parseResourceUrl = function(url) {
if (!urlUtils.isResourceUrl(url)) return null;
const match = url.match(resourceRegex);
const itemId = match[2];
let hash = match[3].trim();
// In general we want the hash to be decoded so that non-alphabetical languages
// appear as-is without being encoded with %.
// Fixes https://github.com/laurent22/joplin/issues/1870
if (hash) hash = urlDecode(hash.substr(1)); // Remove the first #
return {
itemId: itemId,
hash: hash,
};
};
urlUtils.extractResourceUrls = function(text) {
const markdownLinksRE = /\]\((.*?)\)/g;
const output = [];
let result = null;
while ((result = markdownLinksRE.exec(text)) !== null) {
const resourceUrlInfo = urlUtils.parseResourceUrl(result[1]);
if (resourceUrlInfo) output.push(resourceUrlInfo);
}
const htmlRegexes = [
/<img[\s\S]*?src=["']:\/([a-zA-Z0-9]{32})["'][\s\S]*?>/gi,
/<a[\s\S]*?href=["']:\/([a-zA-Z0-9]{32})["'][\s\S]*?>/gi,
];
for (const htmlRegex of htmlRegexes) {
while (true) {
const m = htmlRegex.exec(text);
if (!m) break;
output.push({ itemId: m[1], hash: '' });
}
}
return output;
};
module.exports = urlUtils;