/
cdfHttpClient.ts
156 lines (142 loc) · 4.25 KB
/
cdfHttpClient.ts
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// Copyright 2019 Cognite AS
import * as Url from 'url';
import {
API_KEY_HEADER,
AUTHORIZATION_HEADER,
X_CDF_APP_HEADER,
X_CDF_SDK_HEADER,
} from '../../constants';
import { handleErrorResponse } from '../../error';
import {
bearerString,
isJson,
transformDateInRequest,
transformDateInResponse,
} from '../../utils';
import {
HttpHeaders,
HttpQueryParams,
HttpRequest,
HttpResponse,
} from './basicHttpClient';
import { cdfRetryValidator } from './cdfRetryValidator';
import { HttpError } from './httpError';
import { RetryableHttpClient } from './retryableHttpClient';
export class CDFHttpClient extends RetryableHttpClient {
private static serializeQueryParameters(
params: HttpQueryParams = {}
): HttpQueryParams {
return Object.keys(params).reduce(
(serializedParams, key) => {
const param = params[key];
if (Array.isArray(param)) {
serializedParams[key] = JSON.stringify(param);
} else {
serializedParams[key] = param;
}
return serializedParams;
},
{} as HttpQueryParams
);
}
private static transformDateInResponse<T>(
response: HttpResponse<T>
): HttpResponse<T> {
const { data } = response;
if (!isJson(data)) {
return response;
}
return {
...response,
data: transformDateInResponse(data),
};
}
private static isSameOrigin(baseUrl: string, url: string) {
const { protocol: baseUrlProtocol, host: baseUrlHost } = Url.parse(baseUrl);
const { protocol, host } = Url.parse(Url.resolve(baseUrl, url));
const hasSameProtocol = baseUrlProtocol === protocol;
const hasSameHost = baseUrlHost === host;
return hasSameProtocol && hasSameHost;
}
private static filterHeaders(headers: HttpHeaders, names: string[]) {
return names.reduce(
(partiallyFilteredHeaders, headerName) =>
CDFHttpClient.filterHeader(partiallyFilteredHeaders, headerName),
headers
);
}
private static filterHeader(headers: HttpHeaders, name: string) {
const filteredHeaders: HttpHeaders = {
...headers,
};
delete filteredHeaders[name];
return filteredHeaders;
}
constructor(baseUrl: string) {
super(baseUrl, cdfRetryValidator);
}
public setBearerToken(token: string) {
this.setDefaultHeader(AUTHORIZATION_HEADER, bearerString(token));
}
public set401ResponseHandler(handler: Response401Handler) {
this.response401Handler = handler;
}
protected async preRequest(request: HttpRequest): Promise<HttpRequest> {
const headersWithDefaultHeaders = this.populateDefaultHeaders(
request.headers
);
const headers = this.preventTokenLeakage(
headersWithDefaultHeaders,
request.path
);
const data = transformDateInRequest(request.data);
const serializedQueryParams = CDFHttpClient.serializeQueryParameters(
request.params
);
const params = transformDateInRequest(serializedQueryParams);
return {
...request,
data,
headers,
params,
};
}
protected async postRequest<T>(
response: HttpResponse<T>,
request: HttpRequest
): Promise<HttpResponse<T>> {
const transformedResponse = CDFHttpClient.transformDateInResponse(response);
try {
return await super.postRequest(transformedResponse, request);
} catch (err) {
if (err.status === 401 && !this.isLoginEndpoint(request.path)) {
return new Promise((resolvePromise, rejectPromise) => {
const retry = () => resolvePromise(this.request(request));
const reject = () => rejectPromise(err);
this.response401Handler(err, retry, reject);
});
}
throw handleErrorResponse(err);
}
}
private response401Handler: Response401Handler = (_, __, reject) => reject();
private preventTokenLeakage(headers: HttpHeaders, path: string) {
if (CDFHttpClient.isSameOrigin(this.baseUrl, path)) {
return headers;
}
return CDFHttpClient.filterHeaders(headers, [
AUTHORIZATION_HEADER,
API_KEY_HEADER,
X_CDF_APP_HEADER,
X_CDF_SDK_HEADER,
]);
}
private isLoginEndpoint(url: string) {
return url.toLowerCase().indexOf('/login/status') !== -1;
}
}
type Response401Handler = (
err: HttpError,
retry: () => void,
reject: () => void
) => void;