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Add environment variables to control settings

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Brendan Chen
2025-08-26 17:05:19 -07:00
parent 2c3d0a9fd4
commit 07ccd05734
4 changed files with 34 additions and 10 deletions
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7
.env.example
View File

@@ -8,6 +8,13 @@ APNS_BUNDLE_ID=
# base64-encoded APNs private key # base64-encoded APNs private key
APNS_PRIVATE_KEY= APNS_PRIVATE_KEY=
# control parking data logging
PARKING_LOGGING_INTERVAL_MS= PARKING_LOGGING_INTERVAL_MS=
PARKING_HISTORICAL_AVERAGE_MINIMUM_INTERVAL= PARKING_HISTORICAL_AVERAGE_MINIMUM_INTERVAL=
PARKING_HISTORICAL_AVERAGE_MAXIMUM_TIMESPAN= PARKING_HISTORICAL_AVERAGE_MAXIMUM_TIMESPAN=
# control rate limiting features
RATE_LIMITS_DISABLED=
RATE_LIMIT_WINDOW_MS=
RATE_LIMIT_DELAY_AFTER_REQUESTS=
RATE_LIMIT_DELAY_MULTIPLIER_MS=

3
docker-compose.yml
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@@ -13,6 +13,9 @@ x-common-environment: &common-server-environment
PARKING_LOGGING_INTERVAL_MS: ${PARKING_LOGGING_INTERVAL_MS} PARKING_LOGGING_INTERVAL_MS: ${PARKING_LOGGING_INTERVAL_MS}
REDIS_URL: redis://redis:6379 REDIS_URL: redis://redis:6379
RATE_LIMITS_DISABLED: ${RATE_LIMITS_DISABLED} RATE_LIMITS_DISABLED: ${RATE_LIMITS_DISABLED}
RATE_LIMIT_WINDOW_MS: ${RATE_LIMIT_WINDOW_MS}
RATE_LIMIT_DELAY_AFTER_REQUESTS: ${RATE_LIMIT_DELAY_AFTER_REQUESTS}
RATE_LIMIT_DELAY_MULTIPLIER_MS: ${RATE_LIMIT_DELAY_MULTIPLIER_MS}
services: services:
dev: dev:

12
src/environment.ts
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@@ -10,4 +10,14 @@ export const PARKING_HISTORICAL_AVERAGE_MAXIMUM_TIMESPAN = process.env.PARKING_H
? parseInt(process.env.PARKING_HISTORICAL_AVERAGE_MAXIMUM_TIMESPAN) ? parseInt(process.env.PARKING_HISTORICAL_AVERAGE_MAXIMUM_TIMESPAN)
: 60000 * 60 * 24; : 60000 * 60 * 24;
export const RATE_LIMITS_DISABLED = process.env.RATE_LIMITS_DISABLED !== undefined; export const RATE_LIMITS_DISABLED = process.env.RATE_LIMITS_DISABLED === "1";
export const RATE_LIMIT_WINDOW_MS = process.env.RATE_LIMIT_WINDOW_MS
? parseInt(process.env.RATE_LIMIT_WINDOW_MS)
: 10000;
export const RATE_LIMIT_DELAY_AFTER_REQUESTS = process.env.RATE_LIMIT_DELAY_AFTER_REQUESTS
? parseInt(process.env.RATE_LIMIT_DELAY_AFTER_REQUESTS)
: 10000;
export const RATE_LIMIT_DELAY_MULTIPLIER_MS = process.env.RATE_LIMIT_DELAY_MULTIPLIER_MS
? parseInt(process.env.RATE_LIMIT_DELAY_MULTIPLIER_MS)
: 1000;

22
src/index.ts
View File

@@ -6,8 +6,13 @@ import { InterchangeSystem, InterchangeSystemBuilderArguments } from "./entities
import { ChapmanApiBasedParkingRepositoryLoader } from "./loaders/parking/ChapmanApiBasedParkingRepositoryLoader"; import { ChapmanApiBasedParkingRepositoryLoader } from "./loaders/parking/ChapmanApiBasedParkingRepositoryLoader";
import express from "express"; import express from "express";
import { expressMiddleware } from "@as-integrations/express5"; import { expressMiddleware } from "@as-integrations/express5";
import { RATE_LIMITS_DISABLED } from "./environment"; import {
import rateLimit from "express-rate-limit"; RATE_LIMIT_DELAY_AFTER_REQUESTS,
RATE_LIMIT_DELAY_MULTIPLIER_MS,
RATE_LIMIT_WINDOW_MS,
RATE_LIMITS_DISABLED
} from "./environment";
import slowDown from "express-slow-down";
const typeDefs = readFileSync("./schema.graphqls", "utf8"); const typeDefs = readFileSync("./schema.graphqls", "utf8");
@@ -60,12 +65,12 @@ async function main() {
expressMiddleware(server, options) expressMiddleware(server, options)
); );
} else { } else {
const limiter = rateLimit({ const limiter = slowDown({
windowMs: 60 * 1000, // Every minute windowMs: RATE_LIMIT_WINDOW_MS,
limit: 20000, delayAfter: RATE_LIMIT_DELAY_AFTER_REQUESTS,
standardHeaders: 'draft-8', // draft-6: `RateLimit-*` headers; draft-7 & draft-8: combined `RateLimit` header delayMs: (hits) => {
legacyHeaders: false, // Disable the `X-RateLimit-*` headers. return hits * RATE_LIMIT_DELAY_MULTIPLIER_MS;
ipv6Subnet: 60, // Set to 60 or 64 to be less aggressive, or 52 or 48 to be more aggressive }
}); });
app.use( app.use(
"/", "/",
@@ -75,7 +80,6 @@ async function main() {
); );
} }
const port = process.env.PORT ? parseInt(process.env.PORT) : 4000; const port = process.env.PORT ? parseInt(process.env.PORT) : 4000;
app.listen(port, () => { app.listen(port, () => {
console.log(`Server ready at port ${port}`); console.log(`Server ready at port ${port}`);