hono
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Web framework built on Web Standards
76 lines (75 loc) • 2.37 kB
JavaScript
// 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()] = [{ key: key.toLowerCase(), value }];
});
return cfHeaders;
};
var handle = (app) => {
return async (event, context, callback) => {
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 urlPath = `https://${event.Records[0].cf.config.distributionDomainName}${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
};