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- // src/adapter/lambda-edge/handler.ts
- import crypto from "node:crypto";
- import { decodeBase64, encodeBase64 } from "../../utils/encode.js";
- globalThis.crypto ??= crypto;
- var convertHeaders = (headers) => {
- const cfHeaders = {};
- headers.forEach((value, key) => {
- cfHeaders[key.toLowerCase()] = [
- ...cfHeaders[key.toLowerCase()] || [],
- { key: key.toLowerCase(), value }
- ];
- });
- return cfHeaders;
- };
- var handle = (app) => {
- return async (event, ...args) => {
- const [context, callback] = args;
- const res = await app.fetch(createRequest(event), {
- event,
- context,
- callback: (err, result) => {
- callback?.(err, result);
- },
- config: event.Records[0].cf.config,
- request: event.Records[0].cf.request,
- response: event.Records[0].cf.response
- });
- return createResult(res);
- };
- };
- var createResult = async (res) => {
- const isBase64Encoded = isContentTypeBinary(res.headers.get("content-type") || "");
- const body = isBase64Encoded ? encodeBase64(await res.arrayBuffer()) : await res.text();
- return {
- status: res.status.toString(),
- headers: convertHeaders(res.headers),
- body,
- ...isBase64Encoded && { bodyEncoding: "base64" }
- };
- };
- var createRequest = (event) => {
- const queryString = event.Records[0].cf.request.querystring;
- const host = event.Records[0].cf.request.headers?.host?.[0]?.value || event.Records[0].cf.config.distributionDomainName;
- const urlPath = `https://${host}${event.Records[0].cf.request.uri}`;
- const url = queryString ? `${urlPath}?${queryString}` : urlPath;
- const headers = new Headers();
- Object.entries(event.Records[0].cf.request.headers).forEach(([k, v]) => {
- v.forEach((header) => headers.set(k, header.value));
- });
- const requestBody = event.Records[0].cf.request.body;
- const method = event.Records[0].cf.request.method;
- const body = createBody(method, requestBody);
- return new Request(url, {
- headers,
- method,
- body
- });
- };
- var createBody = (method, requestBody) => {
- if (!requestBody || !requestBody.data) {
- return void 0;
- }
- if (method === "GET" || method === "HEAD") {
- return void 0;
- }
- if (requestBody.encoding === "base64") {
- return decodeBase64(requestBody.data);
- }
- return requestBody.data;
- };
- var isContentTypeBinary = (contentType) => {
- return !/^(text\/(plain|html|css|javascript|csv).*|application\/(.*json|.*xml).*|image\/svg\+xml.*)$/.test(
- contentType
- );
- };
- export {
- createBody,
- handle,
- isContentTypeBinary
- };
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