@serverless-stack/nextjs-lambda
Version:
Provides handlers that can be used in CloudFront Lambda@Edge to deploy next.js applications to the edge
103 lines (102 loc) • 3.72 kB
JavaScript
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var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
Object.defineProperty(o, k2, { enumerable: true, get: function() { return m[k]; } });
}) : (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 });
exports.externalRewrite = exports.createExternalRewriteResponse = void 0;
const next_aws_cloudfront_1 = __importDefault(require("@sls-next/next-aws-cloudfront"));
const ignoredHeaders = [
"connection",
"expect",
"keep-alive",
"proxy-authenticate",
"proxy-authorization",
"proxy-connection",
"trailer",
"upgrade",
"x-accel-buffering",
"x-accel-charset",
"x-accel-limit-rate",
"x-accel-redirect",
"x-cache",
"x-forwarded-proto",
"x-real-ip",
"content-length",
"host",
"transfer-encoding",
"via"
];
const ignoredHeaderPrefixes = ["x-amz-cf-", "x-amzn-", "x-edge-"];
function isIgnoredHeader(name) {
const lowerCaseName = name.toLowerCase();
for (const prefix of ignoredHeaderPrefixes) {
if (lowerCaseName.startsWith(prefix)) {
return true;
}
}
return ignoredHeaders.includes(lowerCaseName);
}
async function createExternalRewriteResponse(customRewrite, req, res, body) {
const { default: fetch } = await Promise.resolve().then(() => __importStar(require("node-fetch")));
const reqHeaders = {};
Object.assign(reqHeaders, req.headers);
if (reqHeaders.hasOwnProperty("host")) {
delete reqHeaders.host;
}
let fetchResponse;
if (body) {
const decodedBody = Buffer.from(body, "base64").toString("utf8");
fetchResponse = await fetch(customRewrite, {
headers: reqHeaders,
method: req.method,
body: decodedBody,
compress: false,
redirect: "manual"
});
}
else {
fetchResponse = await fetch(customRewrite, {
headers: reqHeaders,
method: req.method,
compress: false,
redirect: "manual"
});
}
for (const [name, val] of fetchResponse.headers.entries()) {
if (!isIgnoredHeader(name)) {
res.setHeader(name, val);
}
}
res.statusCode = fetchResponse.status;
res.end(await fetchResponse.buffer());
}
exports.createExternalRewriteResponse = createExternalRewriteResponse;
const externalRewrite = async (event, enableHTTPCompression, rewrite) => {
var _a;
const request = event.Records[0].cf.request;
const { req, res, responsePromise } = (0, next_aws_cloudfront_1.default)(event.Records[0].cf, {
enableHTTPCompression
});
await createExternalRewriteResponse(rewrite + (request.querystring ? "?" : "") + request.querystring, req, res, (_a = request.body) === null || _a === void 0 ? void 0 : _a.data);
return await responsePromise;
};
exports.externalRewrite = externalRewrite;