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createTestProxyEvent.ts
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createTestProxyEvent.ts
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import * as querystring from "querystring";
import * as uuid from "uuid";
import {URL} from "url";
import {ProxyEvent} from "../ProxyEvent";
const randomableCharacters = "abcdefghijklmnopqrstuvwxyz0123456789";
function randomString(length: number): string {
let text = "";
for (let i = 0; i < length; i++) {
text += randomableCharacters.charAt(Math.floor(Math.random() * randomableCharacters.length));
}
return text;
}
const defaultTestProxyEvent: ProxyEvent = {
body: null,
headers: {
Accept: "*/*",
"Accept-Encoding": "gzip, deflate, br",
"CloudFront-Forwarded-Proto": "https",
"CloudFront-Is-Desktop-Viewer": "true",
"CloudFront-Is-Mobile-Viewer": "false",
"CloudFront-Is-SmartTV-Viewer": "false",
"CloudFront-Is-Tablet-Viewer": "false",
"CloudFront-Viewer-Country": "US",
"Content-Type": "application/json",
DNT: "1",
Host: "abcdefghij.execute-api.us-west-2.amazonaws.com",
Origin: "https://www.example.com",
"User-Agent": "Amazon CloudFront",
Via:
"1.1 fda3b2797d2719576f6b916583a28e52.cloudfront.net (CloudFront), 1.1 36810aa1793ee589dc8c194860296079.cloudfront.net (CloudFront)",
"X-Amz-Cf-Id": "1qqWau0XonE5dkx9itahWPUYH_iISQ6g79xZC4VedqtU4LvQyuxpSg==",
"X-Amzn-Trace-Id": "Root=1-5f52a875-7474a6049e17f28a2d083e72",
"X-Forwarded-For": "192.0.2.0, 64.252.141.156, 64.252.141.131",
"X-Forwarded-Port": "443",
"X-Forwarded-Proto": "https",
"X-Requested-With": "XMLHttpRequest"
},
httpMethod: "GET",
isBase64Encoded: false,
multiValueHeaders: {
Accept: ["*/*"],
"Accept-Encoding": ["gzip, deflate, br"],
"CloudFront-Forwarded-Proto": ["https"],
"CloudFront-Is-Desktop-Viewer": ["true"],
"CloudFront-Is-Mobile-Viewer": ["false"],
"CloudFront-Is-SmartTV-Viewer": ["false"],
"CloudFront-Is-Tablet-Viewer": ["false"],
"CloudFront-Viewer-Country": ["US"],
"Content-Type": ["application/json"],
DNT: ["1"],
Host: ["abcdefghij.execute-api.us-west-2.amazonaws.com"],
Origin: ["https://www.example.com"],
"User-Agent": ["Amazon CloudFront"],
Via:
["1.1 fda3b2797d2719576f6b916583a28e52.cloudfront.net (CloudFront), 1.1 36810aa1793ee589dc8c194860296079.cloudfront.net (CloudFront)"],
"X-Amz-Cf-Id": ["1qqWau0XonE5dkx9itahWPUYH_iISQ6g79xZC4VedqtU4LvQyuxpSg=="],
"X-Amzn-Trace-Id": ["Root=1-5f52a875-7474a6049e17f28a2d083e72"],
"X-Forwarded-For": ["192.0.2.0, 64.252.141.156, 64.252.141.131"],
"X-Forwarded-Port": ["443"],
"X-Forwarded-Proto": ["https"],
"X-Requested-With": ["XMLHttpRequest"]
},
multiValueQueryStringParameters: null,
path: "/",
pathParameters: null,
queryStringParameters: null,
requestContext: {
accountId: "12345678912",
apiId: randomString(10),
httpMethod: "GET",
identity: {
accessKey: "abcdefg",
accountId: null,
apiKey: null,
apiKeyId: null,
caller: null,
cognitoAuthenticationProvider: null,
cognitoAuthenticationType: null,
cognitoIdentityId: null,
cognitoIdentityPoolId: null,
sourceIp: "64.252.141.131",
user: null,
userAgent: "PostmanRuntime/2.4.5",
userArn: null
},
path: "/",
requestId: "",
resourceId: randomString(6),
resourcePath: "/{proxy+}",
requestTimeEpoch: Date.now(),
stage: "testStage"
},
resource: "/{proxy+}",
stageVariables: null
};
/**
* Create a fake ProxyEvent object that can be passed into the handler returned
* from getLambdaHandler().
*/
export function createTestProxyEvent(url: string = "/", method: string = "GET", overrides: Partial<ProxyEvent> = {}): ProxyEvent {
const heavyUrl = new URL(url, "https://example.org/");
const mixedQueryStringParams: { [key: string]: string | string[] } = heavyUrl.search ? querystring.parse(heavyUrl.search.substring(1)) : null;
return {
...defaultTestProxyEvent,
...overrides,
headers: {
...defaultTestProxyEvent.headers,
...overrides?.headers
},
multiValueHeaders: {
...defaultTestProxyEvent.multiValueHeaders,
...overrides?.multiValueHeaders
},
requestContext: {
...defaultTestProxyEvent.requestContext,
...overrides.requestContext ? overrides.requestContext : {},
httpMethod: method,
requestId: uuid.v4()
},
httpMethod: method,
path: heavyUrl.pathname,
queryStringParameters: deduplicateQueryStringParameters(mixedQueryStringParams),
multiValueQueryStringParameters: normalizeMultiValueQueryStringParameters(mixedQueryStringParams)
};
}
/**
* Turn a query params object that allows for duplicate query string values into one that doesn't.
* Empirically API Gateway takes the last version on duplicates.
*/
function deduplicateQueryStringParameters(params: { [key: string]: string | string[] }): { [key: string]: string } {
if (params == null) {
return null;
}
const queryStringParameters: { [key: string]: string } = {};
for (const key in params) {
const value = params[key];
if (Array.isArray(value)) {
queryStringParameters[key] = value[value.length - 1];
} else {
queryStringParameters[key] = value;
}
}
return queryStringParameters;
}
function normalizeMultiValueQueryStringParameters(params: { [key: string]: string | string[] }): { [key: string]: string[] } {
if (params == null) {
return null;
}
const multiValueQueryStringParameters: { [key: string]: string[] } = {};
for (const key in params) {
const value = params[key];
if (Array.isArray(value)) {
multiValueQueryStringParameters[key] = value;
} else {
multiValueQueryStringParameters[key] = [value];
}
}
return multiValueQueryStringParameters;
}