diff options
Diffstat (limited to 'packages/taler-wallet-cli/src/rpc.ts')
-rw-r--r-- | packages/taler-wallet-cli/src/rpc.ts | 266 |
1 files changed, 0 insertions, 266 deletions
diff --git a/packages/taler-wallet-cli/src/rpc.ts b/packages/taler-wallet-cli/src/rpc.ts deleted file mode 100644 index 8070b96c5..000000000 --- a/packages/taler-wallet-cli/src/rpc.ts +++ /dev/null @@ -1,266 +0,0 @@ -/* - This file is part of GNU Taler - (C) 2023 Taler Systems S.A. - - GNU Taler is free software; you can redistribute it and/or modify it under the - terms of the GNU General Public License as published by the Free Software - Foundation; either version 3, or (at your option) any later version. - - GNU Taler is distributed in the hope that it will be useful, but WITHOUT ANY - WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR - A PARTICULAR PURPOSE. See the GNU General Public License for more details. - - You should have received a copy of the GNU General Public License along with - GNU Taler; see the file COPYING. If not, see <http://www.gnu.org/licenses/> - */ - -/** - * Implementation for the wallet-core IPC protocol. - * - * Currently the protcol is completely unstable and only used internally - * by the wallet for testing purposes. - */ - -/** - * Imports. - */ -import * as net from "node:net"; -import * as fs from "node:fs"; -import { bytesToString, Logger, typedArrayConcat } from "@gnu-taler/taler-util"; - -const logger = new Logger("rpc.ts"); - -export type JsonMessage = - | string - | number - | boolean - | null - | JsonMessage[] - | { [key: string]: JsonMessage }; - -export interface RpcServerClientHandlers { - onMessage(msg: JsonMessage): void; - onDisconnect(): void; -} - -export interface RpcServerClient { - sendResponse(message: JsonMessage): void; -} - -export interface RpcServerArgs { - socketFilename: string; - onConnect(client: RpcServerClient): RpcServerClientHandlers; -} - -export interface RpcClientServerConnection { - sendMessage(m: JsonMessage): void; - close(): void; -} - -export interface RpcConnectArgs<T> { - socketFilename: string; - onEstablished(connection: RpcClientServerConnection): { - result: T; - onDisconnect(): void; - onMessage(m: JsonMessage): void; - }; -} - -export interface ReadLinewiseArgs { - onLine(lineData: Uint8Array): void; - sock: net.Socket; -} - -function readStreamLinewise(args: ReadLinewiseArgs): void { - let chunks: Uint8Array[] = []; - args.sock.on("data", (buf: Uint8Array) => { - logger.info(`received ${buf.length} bytes`); - // Process all newlines in the newly received buffer - while (1) { - const newlineIdx = buf.indexOf("\n".charCodeAt(0)); - if (newlineIdx >= 0) { - let left = buf.subarray(0, newlineIdx + 1); - let right = buf.subarray(newlineIdx + 1); - chunks.push(left); - const line = typedArrayConcat(chunks); - args.onLine(line); - chunks = []; - buf = right; - } else { - chunks.push(buf); - break; - } - } - }); -} - -export async function connectRpc<T>(args: RpcConnectArgs<T>): Promise<T> { - let sockFilename = args.socketFilename; - return new Promise((resolve, reject) => { - const client = net.createConnection(sockFilename); - client.on("connect", () => { - let parsingBody: string | undefined = undefined; - let bodyChunks: string[] = []; - - logger.info("connected!"); - client.write("%hello-from-client\n"); - const res = args.onEstablished({ - sendMessage(m) { - client.write("%request\n"); - client.write(JSON.stringify(m)); - client.write("\n"); - client.write("%end\n"); - }, - close() { - client.destroy(); - }, - }); - readStreamLinewise({ - sock: client, - onLine(line) { - const lineStr = bytesToString(line); - logger.info(`got line from server: ${lineStr}`); - // Are we currently parsing the body of a request? - if (!parsingBody) { - const strippedLine = lineStr.trim(); - if (strippedLine == "%message") { - logger.info("got message start"); - parsingBody = "message"; - } else if (strippedLine == "%hello-from-server") { - logger.info("got hello from server"); - } else if (strippedLine.startsWith("%error:")) { - logger.info("got error from server, disconnecting"); - client.end(); - res.onDisconnect(); - } else { - logger.info("got unknown request"); - client.write("%error: invalid message\n"); - client.end(); - } - } else if (parsingBody == "message") { - const strippedLine = lineStr.trim(); - if (strippedLine == "%end") { - logger.info("finished request"); - let req = bodyChunks.join(""); - let reqJson: any = undefined; - try { - reqJson = JSON.parse(req); - } catch (e) { - logger.warn("JSON request was invalid"); - } - if (reqJson !== undefined) { - logger.info(`request: ${req}`); - res.onMessage(reqJson); - } else { - client.write("%error: invalid JSON"); - client.end(); - } - bodyChunks = []; - } else { - bodyChunks.push(lineStr); - } - } else { - logger.info("invalid parser state"); - client.write("%error: internal error\n"); - client.end(); - } - }, - }); - client.on("close", () => { - res.onDisconnect(); - }); - client.on("data", () => {}); - resolve(res.result); - }); - }); -} - -export async function runRpcServer(args: RpcServerArgs): Promise<void> { - let sockFilename = args.socketFilename; - try { - fs.unlinkSync(sockFilename); - } catch (e) { - // Do nothing! - } - return new Promise((resolve, reject) => { - const server = net.createServer((sock) => { - // Are we currently parsing the body of a request? - let parsingBody: string | undefined = undefined; - let bodyChunks: string[] = []; - - logger.info("got new connection"); - sock.write("%hello-from-server\n"); - const handlers = args.onConnect({ - sendResponse(message) { - sock.write("%message\n"); - sock.write(JSON.stringify(message)); - sock.write("\n"); - sock.write("%end\n"); - }, - }); - - sock.on("error", (err) => { - logger.info(`connection error: ${err}`); - }); - - function processLine(line: Uint8Array) { - const lineStr = bytesToString(line); - logger.info(`got line: ${lineStr}`); - if (!parsingBody) { - const strippedLine = lineStr.trim(); - if (strippedLine == "%request") { - logger.info("got request start"); - parsingBody = "request"; - } else if (strippedLine === "%hello-from-client") { - console.log("got hello from client"); - } else if (strippedLine.startsWith("%error:")) { - console.log("got error from client"); - sock.end(); - handlers.onDisconnect(); - } else { - logger.info("got unknown request"); - sock.write("%error: invalid request\n"); - sock.end(); - } - } else if (parsingBody == "request") { - const strippedLine = lineStr.trim(); - if (strippedLine == "%end") { - logger.info("finished request"); - let req = bodyChunks.join(""); - let reqJson: any = undefined; - try { - reqJson = JSON.parse(req); - } catch (e) { - logger.warn("JSON request was invalid"); - } - if (reqJson !== undefined) { - logger.info(`request: ${req}`); - handlers.onMessage(reqJson); - } else { - sock.write("%error: invalid JSON"); - sock.end(); - } - bodyChunks = []; - } else { - bodyChunks.push(lineStr); - } - } else { - logger.info("invalid parser state"); - sock.write("%error: internal error\n"); - sock.end(); - } - } - - readStreamLinewise({ - sock, - onLine: processLine, - }); - - sock.on("close", (hadError: boolean) => { - logger.info(`connection closed, hadError=${hadError}`); - handlers.onDisconnect(); - }); - }); - server.listen("wallet-core.sock"); - }); -} |