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Protocol Filter: Catch and return 'invalid url' on all errors

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Scott Nonnenberg 2022-09-06 16:28:00 -07:00 • committed by GitHub
parent b54c6f257d
commit 6a1b6f2e44
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GPG key ID: 4AEE18F83AFDEB23
1 changed files with 31 additions and 31 deletions
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62
app/protocol_filter.ts
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@ -84,6 +84,37 @@ function _createFileHandler({
try {
targetPath = _urlToPath(request.url, { isWindows });
// normalize() is primarily useful here for switching / to \ on windows
const target = normalize(targetPath);
// here we attempt to follow symlinks to the ultimate final path, reflective of what
// we do in main.js on userDataPath and installPath
const realPath = existsSync(target) ? realpathSync(target) : target;
// finally we do case-insensitive checks on windows
const properCasing = isWindows ? realPath.toLowerCase() : realPath;
if (!isAbsolute(realPath)) {
console.log(
`Warning: denying request to non-absolute path '${realPath}'`
);
// This is an "Access Denied" error. See [Chromium's net error list][0].
//
// [0]: https://source.chromium.org/chromium/chromium/src/+/master:net/base/net_error_list.h;l=57;drc=a836ee9868cf1b9673fce362a82c98aba3e195de
callback({ error: -10 });
return;
}
for (const root of allowedRoots) {
if (properCasing.startsWith(isWindows ? root.toLowerCase() : root)) {
callback({ path: realPath });
return;
}
}
console.log(
`Warning: denying request to path '${realPath}' (allowedRoots: '${allowedRoots}')`
);
callback({ error: -10 });
} catch (err) {
const errorMessage =
err && typeof err.message === 'string'
@ -94,38 +125,7 @@ function _createFileHandler({
);
callback({ error: -300 });
return;
}
// normalize() is primarily useful here for switching / to \ on windows
const target = normalize(targetPath);
// here we attempt to follow symlinks to the ultimate final path, reflective of what
// we do in main.js on userDataPath and installPath
const realPath = existsSync(target) ? realpathSync(target) : target;
// finally we do case-insensitive checks on windows
const properCasing = isWindows ? realPath.toLowerCase() : realPath;
if (!isAbsolute(realPath)) {
console.log(
`Warning: denying request to non-absolute path '${realPath}'`
);
// This is an "Access Denied" error. See [Chromium's net error list][0].
//
// [0]: https://source.chromium.org/chromium/chromium/src/+/master:net/base/net_error_list.h;l=57;drc=a836ee9868cf1b9673fce362a82c98aba3e195de
callback({ error: -10 });
return;
}
for (const root of allowedRoots) {
if (properCasing.startsWith(isWindows ? root.toLowerCase() : root)) {
callback({ path: realPath });
return;
}
}
console.log(
`Warning: denying request to path '${realPath}' (allowedRoots: '${allowedRoots}')`
);
callback({ error: -10 });
};
}