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Safely parse numbers from environment vars

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This adds the function parseOptionalInt to help parse numbers
from environment variables

Signed-off-by: David Mehren <git@herrmehren.de>
This commit is contained in:
David Mehren 2021-04-29 15:34:59 +02:00
parent 36e721d4a9
commit 52f6310e91
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GPG key ID: 185982BA4C42B7C3
5 changed files with 23 additions and 8 deletions
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7
src/config/app.config.ts
View file

@ -7,7 +7,7 @@
import { registerAs } from '@nestjs/config';
import * as Joi from 'joi';
import { Loglevel } from './loglevel.enum';
import { buildErrorMessage, toArrayConfig } from './utils';
import { buildErrorMessage, parseOptionalInt, toArrayConfig } from './utils';
export interface AppConfig {
domain: string;
@ -46,11 +46,10 @@ export default registerAs('appConfig', () => {
{
domain: process.env.HD_DOMAIN,
rendererOrigin: process.env.HD_RENDERER_ORIGIN,
port: parseInt(process.env.PORT) || undefined,
port: parseOptionalInt(process.env.PORT),
loglevel: process.env.HD_LOGLEVEL,
forbiddenNoteIds: toArrayConfig(process.env.HD_FORBIDDEN_NOTE_IDS, ','),
maxDocumentLength:
parseInt(process.env.HD_MAX_DOCUMENT_LENGTH) || undefined,
maxDocumentLength: parseOptionalInt(process.env.HD_MAX_DOCUMENT_LENGTH),
},
{
abortEarly: false,

4
src/config/database.config.ts
View file

@ -7,7 +7,7 @@
import * as Joi from 'joi';
import { DatabaseDialect } from './database-dialect.enum';
import { registerAs } from '@nestjs/config';
import { buildErrorMessage } from './utils';
import { buildErrorMessage, parseOptionalInt } from './utils';
export interface DatabaseConfig {
username: string;
@ -62,7 +62,7 @@ export default registerAs('databaseConfig', () => {
password: process.env.HD_DATABASE_PASS,
database: process.env.HD_DATABASE_NAME,
host: process.env.HD_DATABASE_HOST,
port: parseInt(process.env.HD_DATABASE_PORT) || undefined,
port: parseOptionalInt(process.env.HD_DATABASE_PORT),
storage: process.env.HD_DATABASE_STORAGE,
dialect: process.env.HD_DATABASE_DIALECT,
},

4
src/config/hsts.config.ts
View file

@ -6,7 +6,7 @@
import * as Joi from 'joi';
import { registerAs } from '@nestjs/config';
import { buildErrorMessage } from './utils';
import { buildErrorMessage, parseOptionalInt } from './utils';
export interface HstsConfig {
enable: boolean;
@ -32,7 +32,7 @@ export default registerAs('hstsConfig', () => {
const hstsConfig = hstsSchema.validate(
{
enable: process.env.HD_HSTS_ENABLE,
maxAgeSeconds: parseInt(process.env.HD_HSTS_MAX_AGE) || undefined,
maxAgeSeconds: parseOptionalInt(process.env.HD_HSTS_MAX_AGE),
includeSubdomains: process.env.HD_HSTS_INCLUDE_SUBDOMAINS,
preload: process.env.HD_HSTS_PRELOAD,
},

9
src/config/utils.spec.ts
View file

@ -6,6 +6,7 @@
import {
needToLog,
parseOptionalInt,
replaceAuthErrorsWithEnvironmentVariables,
toArrayConfig,
} from './utils';
@ -84,4 +85,12 @@ describe('config utils', () => {
expect(needToLog(currentLevel, Loglevel.TRACE)).toBeTruthy();
});
});
describe('parseOptionalInt', () => {
it('returns undefined on undefined parameter', () => {
expect(parseOptionalInt(undefined)).toEqual(undefined);
});
it('correctly parses a string', () => {
expect(parseOptionalInt('42')).toEqual(42);
});
});
});

7
src/config/utils.ts
View file

@ -113,3 +113,10 @@ function transformLoglevelToInt(loglevel: Loglevel): number {
return 1;
}
}
export function parseOptionalInt(value?: string): number | undefined {
if (value === undefined) {
return undefined;
}
return parseInt(value);
}