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joplin/packages/utils/url.ts
2024-04-27 11:22:36 +01:00

114 lines
3.3 KiB
TypeScript

/* eslint-disable import/prefer-default-export */
// This is a modified version of the file-uri-to-path package:
//
// - It removes the dependency to the "path" package, which wouldn't work with
// React Native.
//
// - It always returns paths with forward slashes "/". This is normally handled
// properly everywhere.
//
// - Adds the "platform" parameter to optionally return paths with "\" for win32
function fileUriToPath_(uri: string, platform: string) {
const sep = '/';
if (
typeof uri !== 'string' ||
uri.length <= 7 ||
uri.substring(0, 7) !== 'file://'
) {
throw new TypeError(
'must pass in a file:// URI to convert to a file path',
);
}
const rest = decodeURI(uri.substring(7));
const firstSlash = rest.indexOf('/');
let host = rest.substring(0, firstSlash);
let path = rest.substring(firstSlash + 1);
// 2. Scheme Definition
// As a special case, <host> can be the string "localhost" or the empty
// string; this is interpreted as "the machine from which the URL is
// being interpreted".
if (host === 'localhost') {
host = '';
}
if (host) {
host = sep + sep + host;
}
// 3.2 Drives, drive letters, mount points, file system root
// Drive letters are mapped into the top of a file URI in various ways,
// depending on the implementation; some applications substitute
// vertical bar ("|") for the colon after the drive letter, yielding
// "file:///c|/tmp/test.txt". In some cases, the colon is left
// unchanged, as in "file:///c:/tmp/test.txt". In other cases, the
// colon is simply omitted, as in "file:///c/tmp/test.txt".
path = path.replace(/^(.+)\|/, '$1:');
// for Windows, we need to invert the path separators from what a URI uses
// if (sep === '\\') {
// path = path.replace(/\//g, '\\');
// }
if (/^.+:/.test(path)) {
// has Windows drive at beginning of path
} else {
// unix path…
path = sep + path;
}
if (platform === 'win32') {
return (host + path).replace(/\//g, '\\');
} else {
return host + path;
}
}
export const fileUriToPath = (path: string, platform = 'linux') => {
const output = fileUriToPath_(path, platform);
// The file-uri-to-path module converts Windows path such as
//
// file://c:/autoexec.bat => \\c:\autoexec.bat
//
// Probably because a file:// that starts with only two slashes is not
// quite valid. If we use three slashes, it works:
//
// file:///c:/autoexec.bat => c:\autoexec.bat
//
// However there are various places in the app where we can find
// paths with only two slashes because paths are often constructed
// as `file://${resourcePath}` - which works in all OSes except
// Windows.
//
// So here we introduce a special case - if we detect that we have
// an invalid Windows path that starts with \\x:, we just remove
// the first two backslashes.
//
// https://github.com/laurent22/joplin/issues/5693
if (output.match(/^\/\/[a-zA-Z]:/)) {
return output.substr(2);
}
return output;
};
export const isDataUrl = (path: string) => {
return path.startsWith('data:');
};
export const hasProtocol = (url: string, protocol: string | string[]) => {
if (!url) return false;
const protocols = typeof protocol === 'string' ? [protocol] : protocol;
url = url.toLowerCase();
for (const p of protocols) {
if (url.startsWith(`${p.toLowerCase()}://`)) return true;
}
return false;
};