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_validate_schema.js
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_validate_schema.js
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/*
* Copyright Elasticsearch B.V. and other contributors where applicable.
* Licensed under the BSD 2-Clause License; you may not use this file except in
* compliance with the BSD 2-Clause License.
*/
'use strict';
// Validate an APM server intake object against its schema.
//
// Usage example:
// const { validateSpan } = require('./_validate_schema')
// const errs = validateSpan(mySpanObj)
// `errs` is null if mySpanObj is valid, else it is an array of ajv ErrorObject.
const fs = require('fs');
const { join } = require('path');
const Ajv = require('ajv').default;
const ajv = new Ajv({ allErrors: true, allowUnionTypes: true, strict: true });
const schemaDir = join(
__dirname,
'integration',
'api-schema',
'apm-server-schema',
);
/**
* Create a validator function for the given APM Server intake type (e.g.
* 'span', 'metadata').
*
* @returns {(data: object) => null | ajv.ErrorObject[]}
*/
function createValidator(apmType, cb) {
const schemaPath = join(schemaDir, apmType + '.json');
const content = fs.readFileSync(schemaPath, { encoding: 'utf8' });
const schema = JSON.parse(content);
const validate = ajv.compile(schema);
return function (data) {
const valid = validate(data);
if (valid) {
return null;
} else {
return validate.errors;
}
};
}
module.exports = {
validateMetadata: createValidator('metadata'),
validateTransaction: createValidator('transaction'),
validateSpan: createValidator('span'),
validateError: createValidator('error'),
validateMetricset: createValidator('metricset'),
};