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Errors,
IErrorFactory,
IErrorMap,
ILocal,
ILog,
IMeta,
IPlatformApi,
IRemote,
} from '@feasibleone/blong/types';
import got, {type HttpsOptions} from 'got';
import GatewayCodecImpl, {
type IConfig as IConfigGatewayCodec,
type IGatewayCodec,
} from './GatewayCodec.ts';
import RemoteImpl from './Remote.ts';
import type {IResolution} from './Resolution.ts';
import tls from './tls.ts';
export interface IRpcClient extends IRemote {
verify: IGatewayCodec['verify'];
}
interface IError extends Error {
type?: string;
req?: object;
res?: object;
}
const errorMap: IErrorMap = {
'rpc.actionEmpty': {message: 'Listing actions returned empty response', statusCode: 403},
'rpc.actionHttp': {message: 'Listing actions returned HTTP error {code}', statusCode: 403},
'rpc.jsonRpcEmpty': 'JSON RPC response without response and error',
'rpc.jsonRpcHttp': 'JSON RPC returned HTTP error {code}',
'rpc.jwtInvalid': {message: 'Invalid authentication ({message})', statusCode: 401},
'rpc.oidcBadIssuer': {message: "OpenID issuer '{issuerId}' is not supported", statusCode: 401},
'rpc.oidcEmpty': {message: 'OpenID returned empty response', statusCode: 401},
'rpc.oidcHttp': {message: 'OpenID returned HTTP error {code}', statusCode: 401},
'rpc.oidcNoIssuer': {message: 'Missing issuer in authentication token', statusCode: 401},
'rpc.oidcNoKid': {message: 'Missing key id in JWT', statusCode: 401},
'rpc.unauthorized': {
message: 'Operation {method} is not allowed for this user',
statusCode: 403,
},
};
interface IConfig extends IConfigGatewayCodec {
tls?: {ca?: string | string[]; key?: string; cert?: string; crl?: string};
logLevel?: Parameters<ILog['logger']>[0];
latency: number;
debug: boolean;
}
export default class RpcClientImpl extends RemoteImpl implements IRpcClient {
#config: IConfig = {
latency: 50,
debug: false,
};
#https: HttpsOptions;
#gatewayCodec: IGatewayCodec;
#resolution: IResolution;
#errors: Errors<typeof errorMap>;
#platform: IPlatformApi;
public constructor(
config: IConfig,
{
log,
error,
resolution,
local,
platform,
}: {
log: ILog;
error: IErrorFactory;
resolution: IResolution;
local: ILocal;
platform: IPlatformApi;
},
) {
super(config, {log, error, local, platform});
config = this.merge(this.#config, config);
this.#resolution = resolution;
this.#platform = platform;
this.#errors = error.register(errorMap);
this.#https = tls(config, true) as unknown as HttpsOptions;
this.#gatewayCodec = new GatewayCodecImpl(
config,
'http',
'8091',
this.#errors,
this.sender('request'),
this.#resolution,
);
}
public verify(
...params: Parameters<IGatewayCodec['verify']>
): ReturnType<IGatewayCodec['verify']> {
return this.#gatewayCodec.verify(...params);
}
public gateway(
...params: Parameters<IGatewayCodec['gateway']>
): ReturnType<IGatewayCodec['gateway']> {
return this.#gatewayCodec.gateway(...params);
}
protected sender(
methodType: 'request' | 'publish',
): (...params: unknown[]) => Promise<unknown> {
return async (msg, ...rest) => {
const callerMeta = rest.pop() as IMeta;
const {stream, ...$meta} = callerMeta;
const {encode, decode, requestParams} = await this.#gatewayCodec.codec(
$meta,
methodType,
);
const {params, headers, method = $meta.method} = await encode(msg, ...rest, $meta);
const sendRequest = async (): Promise<unknown> => {
try {
const response = await got.post<{
jsonrpc?: string;
error?: unknown;
validation?: unknown;
debug?: unknown;
}>(
`${requestParams.protocol}://${requestParams.hostname}:${requestParams.port}${requestParams.path}`,
{
https: this.#https,
followRedirect: false,
json: {
jsonrpc: '2.0',
method,
id: 1,
...($meta.timeout &&
$meta.timeout[0] && {
timeout: this.#platform.timing.spare(
$meta.timeout,
this.#config.latency,
),
}),
params,
},
responseType: 'json',
headers: {
'x-envoy-decorator-operation': method,
...$meta.forward,
...headers,
},
},
);
const {body} = response;
if (body?.error !== undefined) {
const error: IError = body.jsonrpc
? Object.assign(new Error(), await decode(body.error, true))
: typeof body.error === 'string'
? new Error(body.error)
: Object.assign(new Error(), body.error);
if (error.type)
Object.defineProperty(error, 'name', {
value: error.type,
configurable: true,
enumerable: false,
});
error.req = response.request && {
httpVersion: response.httpVersion,
url: response.request.requestUrl,
method: response.request.options.method,
...(this.#config.debug && this.sanitize(params, $meta)),
};
error.res = {
httpVersion: response.httpVersion,
statusCode: response.statusCode,
};
throw error;
} else if (response.statusCode < 200 || response.statusCode >= 300) {
throw this.#errors['rpc.jsonRpcHttp']({
statusCode: response.statusCode,
// statusText: response.statusText,
statusMessage: response.statusMessage,
httpVersion: response.httpVersion,
validation: response.body?.validation,
debug: response.body?.debug,
params: {
code: response.statusCode,
},
...(response.request && {
url: response.request.requestUrl,
method: response.request.options.method,
}),
});
} else if (typeof body === 'object' && 'result' in body && !('error' in body)) {
const result = await decode(body.result);
if (/\.service\.get$/.test(method!))
Object.assign((result as Record<string, unknown>[])[0], requestParams);
if ((body as unknown as {checkpoints?: unknown[]}).checkpoints?.length) {
((callerMeta as {checkpoints?: unknown[]}).checkpoints ??= []).push(
...(body as unknown as {checkpoints: unknown[]}).checkpoints,
);
}
return result;
} else {
throw this.#errors['rpc.jsonRpcEmpty']();
}
} catch (error) {
const typedError = error as {code?: string; connect?: unknown};
if (this.#resolution && requestParams.cache) {
// invalidate cache and retry upon connection fail
switch (typedError.code) {
case 'ETIMEDOUT':
case 'ESOCKETTIMEDOUT':
if (!typedError.connect) break; // https://www.npmjs.com/package/request#timeouts
case 'ENOTFOUND':
case 'ECONNREFUSED':
Object.assign(
requestParams,
await this.#resolution.resolve(
requestParams.cache,
true,
requestParams.namespace!,
),
);
delete requestParams.cache;
return sendRequest();
}
}
throw error;
}
};
return stream ? [sendRequest()] : sendRequest();
};
}
}
|