express-msgpack
Version:
Transparent MessagePack middleware for Express
77 lines (76 loc) • 2.94 kB
JavaScript
;
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
var desc = Object.getOwnPropertyDescriptor(m, k);
if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
desc = { enumerable: true, get: function() { return m[k]; } };
}
Object.defineProperty(o, k2, desc);
}) : (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
o["default"] = v;
});
var __importStar = (this && this.__importStar) || function (mod) {
if (mod && mod.__esModule) return mod;
var result = {};
if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
__setModuleDefault(result, mod);
return result;
};
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
const raw_body_1 = __importDefault(require("raw-body"));
exports.default = (overrides = {}) => {
const optionsPromise = createOptions(overrides);
return async (req, res, next) => {
try {
const options = await optionsPromise;
const _json = res.json;
res.json = (body) => {
return res.format({
"application/json": () => _json.call(res, body),
[options.mimeType]: () => res.send(options.encoder(body)),
});
};
if (new RegExp(`^${options.mimeType}`, "i").test(req.header("Content-Type") ?? "")) {
return (0, raw_body_1.default)(req, { length: req.header("Content-Length"), limit: options.limit }, bodyHandler(options, req, next));
}
next();
}
catch (err) {
next(err);
}
};
};
const bodyHandler = (options, req, next) => (err, body) => {
if (err) {
return next(err);
}
try {
req.body = options.decoder(body);
}
catch (err) {
return next(err);
}
req._body = true;
next();
};
const createOptions = async (overrides) => {
return {
decoder: overrides.decoder
?? await Promise.resolve().then(() => __importStar(require("@msgpack/msgpack"))).then(({ decode }) => decode),
encoder: overrides.encoder
?? await Promise.resolve().then(() => __importStar(require("@msgpack/msgpack"))).then(({ encode }) => (body) => Buffer.from(encode(body))),
limit: overrides.limit
?? "100kb",
mimeType: overrides.mimeType
?? "application/msgpack",
};
};