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/* eslint-disable @typescript-eslint/no-explicit-any */
/* eslint-disable unicorn/no-nested-ternary */
import { ConnectionNames, PosgresProgramOptions, getPostgresOption } from '../options/postgres';
import { DnsResolver } from '../utils';
import { InvalidProgramOption, MissingProgramOption } from '../errors';
import { Logger } from 'ts-log';
import { Observable, defer, from, of } from 'rxjs';
import { PgConnectionConfig } from '@cardano-sdk/projection-typeorm';
import { Pool, PoolConfig, QueryConfig } from 'pg';
import { TlsOptions } from 'tls';
import { isConnectionError, toSerializableObject } from '@cardano-sdk/util';
import connString from 'pg-connection-string';
import fs from 'fs';
const TIMEOUT = 60 * 1000;
const timedQuery = (pool: Pool, logger: Logger) => async (args: string | QueryConfig, values?: any) => {
const startTime = Date.now();
const result = await pool.query(args, values);
const query =
typeof args === 'string'
? `${args} ${JSON.stringify(toSerializableObject(values))}\nMISSING PREPARED STATEMENT`
: 'text' in args && typeof args.text === 'string'
? `${args.text} ${JSON.stringify(toSerializableObject(args.values))}`
: `${JSON.stringify(toSerializableObject({ args, values }))}\nUNEXPECTED QUERY FORMAT`;
logger.debug(`Query\n${query}\ntook ${Date.now() - startTime} milliseconds`);
return result;
};
/**
* Creates a extended Pool client :
* - use passed srv service name in order to resolve the port
* - make dealing with failover (re-resolving the port) opaque
* - use exponential backoff retry internally with default timeout and factor
* - intercept 'query' operation and handle connection errors runtime
* - all other operations are bind to pool object without modifications
*
* @returns pg.Pool instance
*/
export const getPoolWithServiceDiscovery = async (
dnsResolver: DnsResolver,
logger: Logger,
{ host, database, max, password, ssl, user }: PoolConfig
): Promise<Pool> => {
const { name, port } = await dnsResolver(host!);
let pool = new Pool({
connectionTimeoutMillis: TIMEOUT,
database,
host: name,
max,
password,
port,
query_timeout: TIMEOUT,
ssl,
user
});
return new Proxy<Pool>({} as Pool, {
get(_, prop, receiver) {
if (prop === 'then') return;
if (prop === 'query') {
return (args: string | QueryConfig, values?: any) =>
timedQuery(pool, logger)(args, values).catch(async (error) => {
if (isConnectionError(error)) {
const record = await dnsResolver(host!);
logger.info(`DNS resolution for Postgres service, resolved with record: ${JSON.stringify(record)}`);
pool = new Pool({
connectionTimeoutMillis: TIMEOUT,
database,
host: record.name,
max,
password,
port: record.port,
query_timeout: TIMEOUT,
ssl,
user
});
return timedQuery(receiver, logger)(args, values);
}
throw error;
});
}
// Bind if it is a function, no intercept operations
if (typeof pool[prop as keyof Pool] === 'function') {
const method = pool[prop as keyof Pool] as any;
return method.bind(pool);
}
return pool[prop as keyof Pool];
}
});
};
export const loadSecret = (path: string) => fs.readFileSync(path, 'utf8').toString();
// types of 'pg-connection-string' seem to be incorrect:
// according to documentation it is either a boolean or a compatible TlsOptions object.
const mergeTlsOptions = (
conn: connString.ConnectionOptions,
ssl: { ca: string } | undefined
): boolean | TlsOptions | undefined =>
typeof conn.ssl === 'object'
? {
...(conn.ssl as TlsOptions),
ca: ssl?.ca || (conn.ssl as TlsOptions).ca
}
: ssl || !!conn.ssl;
export const connStringToPgConnectionConfig = (
postgresConnectionString: string,
{
poolSize,
ssl
}: {
poolSize?: number;
ssl?: { ca: string };
} = {}
): PgConnectionConfig => {
const conn = connString.parse(postgresConnectionString);
Iif (!conn.database || !conn.host) {
throw new InvalidProgramOption('postgresConnectionString');
}
return {
database: conn.database,
host: conn.host,
password: conn.password,
poolSize,
port: conn.port ? Number.parseInt(conn.port) : undefined,
ssl: mergeTlsOptions(conn, ssl),
username: conn.user
};
};
export const getConnectionConfig = <Suffix extends ConnectionNames>(
dnsResolver: DnsResolver,
program: string,
suffix: Suffix,
options?: PosgresProgramOptions<Suffix>
): Observable<PgConnectionConfig> => {
const max = getPostgresOption(suffix, 'postgresPoolMax', options);
const postgresConnectionString = getPostgresOption(suffix, 'postgresConnectionString', options);
const postgresSslCaFile = getPostgresOption(suffix, 'postgresSslCaFile', options);
const ssl = postgresSslCaFile ? { ca: loadSecret(postgresSslCaFile) } : undefined;
if (postgresConnectionString) {
return of(connStringToPgConnectionConfig(postgresConnectionString, { poolSize: max, ssl }));
}
const postgresDb = getPostgresOption(suffix, 'postgresDb', options);
const postgresPassword = getPostgresOption(suffix, 'postgresPassword', options);
const postgresSrvServiceName = getPostgresOption(suffix, 'postgresSrvServiceName', options);
const postgresUser = getPostgresOption(suffix, 'postgresUser', options);
if (postgresSrvServiceName && postgresUser && postgresDb && postgresPassword) {
return defer(() =>
from(
dnsResolver(postgresSrvServiceName).then(
(record): PgConnectionConfig => ({
database: postgresDb,
host: record.name,
password: postgresPassword,
port: record.port,
ssl,
username: postgresUser
})
)
)
);
}
throw new MissingProgramOption(program, [
'postgresConnectionString',
'postgresSrvServiceName',
'postgresUser',
'postgresDb',
'postgresPassword'
]);
};
export const getPool = async (
dnsResolver: DnsResolver,
logger: Logger,
options?: PosgresProgramOptions<'DbSync'>
): Promise<Pool | undefined> => {
const ssl = options?.postgresSslCaFileDbSync ? { ca: loadSecret(options.postgresSslCaFileDbSync) } : undefined;
if (options?.postgresConnectionStringDbSync) {
const pool = new Pool({
connectionString: options.postgresConnectionStringDbSync,
connectionTimeoutMillis: TIMEOUT,
max: options.postgresPoolMaxDbSync,
query_timeout: TIMEOUT,
ssl
});
return new Proxy<Pool>({} as Pool, {
get(_, prop) {
if (prop === 'then') return;
if (prop === 'query') {
return timedQuery(pool, logger);
}
// Bind if it is a function, no intercept operations
if (typeof pool[prop as keyof Pool] === 'function') {
const method = pool[prop as keyof Pool] as any;
return method.bind(pool);
}
return pool[prop as keyof Pool];
}
});
}
if (
options?.postgresSrvServiceNameDbSync &&
options.postgresUserDbSync &&
options.postgresDbDbSync &&
options.postgresPasswordDbSync
) {
return getPoolWithServiceDiscovery(dnsResolver, logger, {
database: options.postgresDbDbSync,
host: options.postgresSrvServiceNameDbSync,
max: options.postgresPoolMaxDbSync,
password: options.postgresPasswordDbSync,
ssl,
user: options.postgresUserDbSync
});
}
// If db connection string is not passed nor postgres srv service name
return undefined;
};
const getSecret = (secretFilePath?: string, secret?: string) =>
secretFilePath ? loadSecret(secretFilePath) : secret ? secret : undefined;
export const connectionStringFromArgs = <Suffix extends ConnectionNames>(
args: PosgresProgramOptions<Suffix>,
suffix: Suffix
) => {
const dbName = getSecret(
getPostgresOption(suffix, 'postgresDbFile', args),
getPostgresOption(suffix, 'postgresDb', args)
);
const dbUser = getSecret(
getPostgresOption(suffix, 'postgresUserFile', args),
getPostgresOption(suffix, 'postgresUser', args)
);
const dbPassword = getSecret(
getPostgresOption(suffix, 'postgresPasswordFile', args),
getPostgresOption(suffix, 'postgresPassword', args)
);
// Setting the connection string takes preference over secrets.
// It can also remain undefined since there is no a default value. Usually used locally with static config.
let postgresConnectionString = getPostgresOption(suffix, 'postgresConnectionString', args);
if (postgresConnectionString) {
postgresConnectionString = new URL(postgresConnectionString).toString();
} else {
const postgresHost = getPostgresOption(suffix, 'postgresHost', args);
const postgresPort = getPostgresOption(suffix, 'postgresPort', args);
Iif (dbName && dbPassword && dbUser && postgresHost && postgresPort)
postgresConnectionString = `postgresql://${dbUser}:${dbPassword}@${postgresHost}:${postgresPort}/${dbName}`;
}
return postgresConnectionString;
};
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