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refactor: mmap asar files (#24470)

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Jeremy Rose 2020-08-04 11:48:04 -07:00 • committed by GitHub
parent 15ee34a1f2
commit 01a2e23194
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GPG key ID: 4AEE18F83AFDEB23
7 changed files with 133 additions and 114 deletions
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49
lib/asar/fs-wrapper.ts
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@ -529,17 +529,15 @@ export const wrapFsWithAsar = (fs: Record<string, any>) => {
return fs.readFile(realPath, options, callback);
}
const buffer = Buffer.alloc(info.size);
const fd = archive.getFd();
if (!(fd >= 0)) {
const error = createError(AsarError.NOT_FOUND, { asarPath, filePath });
nextTick(callback, [error]);
return;
}
logASARAccess(asarPath, filePath, info.offset);
fs.read(fd, buffer, 0, info.size, info.offset, (error: Error) => {
callback(error, encoding ? buffer.toString(encoding) : buffer);
archive.read(info.offset, info.size).then((buf) => {
const buffer = Buffer.from(buf);
callback(null, encoding ? buffer.toString(encoding) : buffer);
}, (err) => {
const error: AsarErrorObject = new Error(`EINVAL, ${err.message} while reading ${filePath} in ${asarPath}`);
error.code = 'EINVAL';
error.errno = -22;
callback(error);
});
};
@ -572,13 +570,19 @@ export const wrapFsWithAsar = (fs: Record<string, any>) => {
}
const { encoding } = options;
const buffer = Buffer.alloc(info.size);
const fd = archive.getFd();
if (!(fd >= 0)) throw createError(AsarError.NOT_FOUND, { asarPath, filePath });
logASARAccess(asarPath, filePath, info.offset);
fs.readSync(fd, buffer, 0, info.size, info.offset);
return (encoding) ? buffer.toString(encoding) : buffer;
let arrayBuffer: ArrayBuffer;
try {
arrayBuffer = archive.readSync(info.offset, info.size);
} catch (err) {
const error: AsarErrorObject = new Error(`EINVAL, ${err.message} while reading ${filePath} in ${asarPath}`);
error.code = 'EINVAL';
error.errno = -22;
throw error;
}
const buffer = Buffer.from(arrayBuffer);
return encoding ? buffer.toString(encoding) : buffer;
};
const { readdir } = fs;
@ -685,12 +689,17 @@ export const wrapFsWithAsar = (fs: Record<string, any>) => {
return fs.readFileSync(realPath, { encoding: 'utf8' });
}
const buffer = Buffer.alloc(info.size);
const fd = archive.getFd();
if (!(fd >= 0)) return [];
logASARAccess(asarPath, filePath, info.offset);
fs.readSync(fd, buffer, 0, info.size, info.offset);
let arrayBuffer: ArrayBuffer;
try {
arrayBuffer = archive.readSync(info.offset, info.size);
} catch (err) {
const error: AsarErrorObject = new Error(`EINVAL, ${err.message} while reading ${filePath} in ${asarPath}`);
error.code = 'EINVAL';
error.errno = -22;
throw error;
}
const buffer = Buffer.from(arrayBuffer);
const str = buffer.toString('utf8');
return [str, str.length > 0];
};