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results.js
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// Copyright 2021 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
'use strict';
const parseShortString = (value, desc) => {
if (typeof value !== 'string') {
throw new Error(`${desc} should be a string; got ${typeof value}`);
}
if (value.length > 1000) {
throw new Error(`${desc} should be a short string; string is too long`);
}
return value;
};
// Parse a results payload from the client into a structure that only contains
// the expected data and does not contain any long strings.
const parseResults = (url, results) => {
try {
url = new URL(url).toString();
} catch (e) {
throw new Error('invalid URL');
}
if (!Array.isArray(results)) {
throw new Error('results should be an array');
}
results = results.map((v, i) => {
if (!v || typeof v !== 'object') {
throw new Error(`results[${i}] should be an object; got ${v}`);
}
const copy = {};
copy.name = parseShortString(v.name, `results[${i}].name`);
if (![true, false, null].includes(v.result)) {
throw new Error(`results[${i}].result (${v.name}) should be true/false/null; got ${v.result}`);
}
copy.result = v.result;
if (v.result === null) {
copy.message = parseShortString(v.message, `results[${i}].message (${v.name})`);
}
// Copy exposure either from |v.exposure| or |v.info.exposure|.
if (v.info) {
copy.exposure = parseShortString(v.info.exposure, `results[${i}].info.exposure (${v.name})`);
// Don't copy |v.info.code|.
} else {
copy.exposure = parseShortString(v.exposure, `results[${i}].exposure (${v.name})`);
}
return copy;
});
return [url, results];
};
module.exports = {parseResults};