File size: 11,906 Bytes
a5d718a | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 | // src/adapter/aws-lambda/handler.ts
import { decodeBase64, encodeBase64 } from "../../utils/encode.js";
function sanitizeHeaderValue(value) {
const hasNonAscii = /[^\x00-\x7F]/.test(value);
if (!hasNonAscii) {
return value;
}
return encodeURIComponent(value);
}
var getRequestContext = (event) => {
return event.requestContext;
};
var streamToNodeStream = async (reader, writer) => {
let readResult = await reader.read();
while (!readResult.done) {
writer.write(readResult.value);
readResult = await reader.read();
}
writer.end();
};
var streamHandle = (app) => {
return awslambda.streamifyResponse(
async (event, responseStream, context) => {
const processor = getProcessor(event);
try {
const req = processor.createRequest(event);
const requestContext = getRequestContext(event);
const res = await app.fetch(req, {
event,
requestContext,
context
});
const headers = {};
const cookies = [];
res.headers.forEach((value, name) => {
if (name === "set-cookie") {
cookies.push(value);
} else {
headers[name] = value;
}
});
const httpResponseMetadata = {
statusCode: res.status,
headers,
cookies
};
responseStream = awslambda.HttpResponseStream.from(responseStream, httpResponseMetadata);
if (res.body) {
await streamToNodeStream(res.body.getReader(), responseStream);
} else {
responseStream.write("");
}
} catch (error) {
console.error("Error processing request:", error);
responseStream.write("Internal Server Error");
} finally {
responseStream.end();
}
}
);
};
var handle = (app, { isContentTypeBinary } = { isContentTypeBinary: void 0 }) => {
return async (event, lambdaContext) => {
const processor = getProcessor(event);
let req, requestContext;
try {
req = processor.createRequest(event);
requestContext = getRequestContext(event);
} catch (error) {
console.error("Error processing request:", error);
const errorResponse = error instanceof TypeError ? new Response("Invalid request", { status: 400 }) : new Response("Internal Server Error", { status: 500 });
return processor.createResult(event, errorResponse, { isContentTypeBinary });
}
const res = await app.fetch(req, {
event,
requestContext,
lambdaContext
});
return processor.createResult(event, res, { isContentTypeBinary });
};
};
var EventProcessor = class {
getHeaderValue(headers, key) {
const value = headers ? Array.isArray(headers[key]) ? headers[key][0] : headers[key] : void 0;
return value;
}
getDomainName(event) {
if (event.requestContext && "domainName" in event.requestContext) {
return event.requestContext.domainName;
}
const hostFromHeaders = this.getHeaderValue(event.headers, "host");
if (hostFromHeaders) {
return hostFromHeaders;
}
const multiValueHeaders = "multiValueHeaders" in event ? event.multiValueHeaders : {};
const hostFromMultiValueHeaders = this.getHeaderValue(multiValueHeaders, "host");
return hostFromMultiValueHeaders;
}
createRequest(event) {
const queryString = this.getQueryString(event);
const domainName = this.getDomainName(event);
const path = this.getPath(event);
const urlPath = `https://${domainName}${path}`;
const url = queryString ? `${urlPath}?${queryString}` : urlPath;
const headers = this.getHeaders(event);
const method = this.getMethod(event);
const requestInit = {
headers,
method
};
if (event.body) {
const body = event.isBase64Encoded ? decodeBase64(event.body) : new TextEncoder().encode(event.body);
requestInit.body = body;
headers.set("content-length", body.length.toString());
}
return new Request(url, requestInit);
}
async createResult(event, res, options) {
const contentType = res.headers.get("content-type");
const isContentTypeBinary = options.isContentTypeBinary ?? defaultIsContentTypeBinary;
let isBase64Encoded = contentType && isContentTypeBinary(contentType) ? true : false;
if (!isBase64Encoded) {
const contentEncoding = res.headers.get("content-encoding");
isBase64Encoded = isContentEncodingBinary(contentEncoding);
}
const body = isBase64Encoded ? encodeBase64(await res.arrayBuffer()) : await res.text();
const result = {
body,
statusCode: res.status,
isBase64Encoded,
..."multiValueHeaders" in event && event.multiValueHeaders ? {
multiValueHeaders: {}
} : {
headers: {}
}
};
this.setCookies(event, res, result);
if (result.multiValueHeaders) {
res.headers.forEach((value, key) => {
result.multiValueHeaders[key] = [value];
});
} else {
res.headers.forEach((value, key) => {
result.headers[key] = value;
});
}
return result;
}
setCookies(_event, res, result) {
if (res.headers.has("set-cookie")) {
const cookies = res.headers.getSetCookie ? res.headers.getSetCookie() : Array.from(res.headers.entries()).filter(([k]) => k === "set-cookie").map(([, v]) => v);
if (Array.isArray(cookies)) {
this.setCookiesToResult(result, cookies);
res.headers.delete("set-cookie");
}
}
}
};
var EventV2Processor = class extends EventProcessor {
getPath(event) {
return event.rawPath;
}
getMethod(event) {
return event.requestContext.http.method;
}
getQueryString(event) {
return event.rawQueryString;
}
getCookies(event, headers) {
if (Array.isArray(event.cookies)) {
headers.set("Cookie", event.cookies.join("; "));
}
}
setCookiesToResult(result, cookies) {
result.cookies = cookies;
}
getHeaders(event) {
const headers = new Headers();
this.getCookies(event, headers);
if (event.headers) {
for (const [k, v] of Object.entries(event.headers)) {
if (v) {
headers.set(k, v);
}
}
}
return headers;
}
};
var v2Processor = new EventV2Processor();
var EventV1Processor = class extends EventProcessor {
getPath(event) {
return event.path;
}
getMethod(event) {
return event.httpMethod;
}
getQueryString(event) {
if (event.multiValueQueryStringParameters) {
return Object.entries(event.multiValueQueryStringParameters || {}).filter(([, value]) => value).map(
([key, values]) => values.map((value) => `${encodeURIComponent(key)}=${encodeURIComponent(value)}`).join("&")
).join("&");
} else {
return Object.entries(event.queryStringParameters || {}).filter(([, value]) => value).map(([key, value]) => `${encodeURIComponent(key)}=${encodeURIComponent(value || "")}`).join("&");
}
}
getCookies(_event, _headers) {
}
getHeaders(event) {
const headers = new Headers();
this.getCookies(event, headers);
if (event.headers) {
for (const [k, v] of Object.entries(event.headers)) {
if (v) {
headers.set(k, sanitizeHeaderValue(v));
}
}
}
if (event.multiValueHeaders) {
for (const [k, values] of Object.entries(event.multiValueHeaders)) {
if (values) {
const foundK = headers.get(k);
values.forEach((v) => {
const sanitizedValue = sanitizeHeaderValue(v);
return (!foundK || !foundK.includes(sanitizedValue)) && headers.append(k, sanitizedValue);
});
}
}
}
return headers;
}
setCookiesToResult(result, cookies) {
result.multiValueHeaders = {
"set-cookie": cookies
};
}
};
var v1Processor = new EventV1Processor();
var ALBProcessor = class extends EventProcessor {
getHeaders(event) {
const headers = new Headers();
if (event.multiValueHeaders) {
for (const [key, values] of Object.entries(event.multiValueHeaders)) {
if (values && Array.isArray(values)) {
const sanitizedValue = sanitizeHeaderValue(values.join("; "));
headers.set(key, sanitizedValue);
}
}
} else {
for (const [key, value] of Object.entries(event.headers ?? {})) {
if (value) {
headers.set(key, sanitizeHeaderValue(value));
}
}
}
return headers;
}
getPath(event) {
return event.path;
}
getMethod(event) {
return event.httpMethod;
}
getQueryString(event) {
if (event.multiValueQueryStringParameters) {
return Object.entries(event.multiValueQueryStringParameters || {}).filter(([, value]) => value).map(([key, value]) => `${key}=${value.join(`&${key}=`)}`).join("&");
} else {
return Object.entries(event.queryStringParameters || {}).filter(([, value]) => value).map(([key, value]) => `${key}=${value}`).join("&");
}
}
getCookies(event, headers) {
let cookie;
if (event.multiValueHeaders) {
cookie = event.multiValueHeaders["cookie"]?.join("; ");
} else {
cookie = event.headers ? event.headers["cookie"] : void 0;
}
if (cookie) {
headers.append("Cookie", cookie);
}
}
setCookiesToResult(result, cookies) {
if (result.multiValueHeaders) {
result.multiValueHeaders["set-cookie"] = cookies;
} else {
result.headers["set-cookie"] = cookies[0];
}
}
};
var albProcessor = new ALBProcessor();
var LatticeV2Processor = class extends EventProcessor {
getPath(event) {
return event.path;
}
getMethod(event) {
return event.method;
}
getQueryString() {
return "";
}
getHeaders(event) {
const headers = new Headers();
if (event.headers) {
for (const [k, values] of Object.entries(event.headers)) {
if (values) {
const foundK = headers.get(k);
values.forEach((v) => {
const sanitizedValue = sanitizeHeaderValue(v);
return (!foundK || !foundK.includes(sanitizedValue)) && headers.append(k, sanitizedValue);
});
}
}
}
return headers;
}
getCookies() {
}
setCookiesToResult(result, cookies) {
result.headers = {
...result.headers,
"set-cookie": cookies
};
}
};
var latticeV2Processor = new LatticeV2Processor();
var getProcessor = (event) => {
if (isProxyEventALB(event)) {
return albProcessor;
}
if (isProxyEventV2(event)) {
return v2Processor;
}
if (isLatticeEventV2(event)) {
return latticeV2Processor;
}
return v1Processor;
};
var isProxyEventALB = (event) => {
if (event.requestContext) {
return Object.hasOwn(event.requestContext, "elb");
}
return false;
};
var isProxyEventV2 = (event) => {
return Object.hasOwn(event, "rawPath");
};
var isLatticeEventV2 = (event) => {
if (event.requestContext) {
return Object.hasOwn(event.requestContext, "serviceArn");
}
return false;
};
var defaultIsContentTypeBinary = (contentType) => {
return !/^text\/(?:plain|html|css|javascript|csv)|(?:\/|\+)(?:json|xml)\s*(?:;|$)/.test(
contentType
);
};
var isContentEncodingBinary = (contentEncoding) => {
if (contentEncoding === null) {
return false;
}
return /^(gzip|deflate|compress|br)/.test(contentEncoding);
};
export {
ALBProcessor,
EventProcessor,
EventV1Processor,
EventV2Processor,
LatticeV2Processor,
defaultIsContentTypeBinary,
getProcessor,
handle,
isContentEncodingBinary,
streamHandle
};
|