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