owltech
Version:
This a backend for OwlTech Company
205 lines • 7.92 kB
JavaScript
;
// Copyright 2018, Google, LLC.
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
return new (P || (P = Promise))(function (resolve, reject) {
function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
step((generator = generator.apply(thisArg, _arguments || [])).next());
});
};
Object.defineProperty(exports, "__esModule", { value: true });
const extend = require("extend");
const node_fetch_1 = require("node-fetch");
const qs = require("querystring");
const stream = require("stream");
const url = require("url");
const common_1 = require("./common");
const isbrowser_1 = require("./isbrowser");
const retry_1 = require("./retry");
const URL = isbrowser_1.isBrowser() ? window.URL : url.URL;
const fetch = isbrowser_1.isBrowser() ? window.fetch : node_fetch_1.default;
// tslint:disable-next-line variable-name no-any
let HttpsProxyAgent;
// Figure out if we should be using a proxy. Only if it's required, load
// the https-proxy-agent module as it adds startup cost.
function loadProxy() {
const proxy = process.env.HTTPS_PROXY || process.env.https_proxy ||
process.env.HTTP_PROXY || process.env.http_proxy;
if (proxy) {
HttpsProxyAgent = require('https-proxy-agent');
}
return proxy;
}
loadProxy();
class Gaxios {
/**
* The Gaxios class is responsible for making HTTP requests.
* @param defaults The default set of options to be used for this instance.
*/
constructor(defaults) {
this.agentCache = new Map();
this.defaults = defaults || {};
}
/**
* Perform an HTTP request with the given options.
* @param opts Set of HTTP options that will be used for this HTTP request.
*/
request(opts = {}) {
return __awaiter(this, void 0, void 0, function* () {
opts = this.validateOpts(opts);
try {
let translatedResponse;
if (opts.adapter) {
translatedResponse = yield opts.adapter(opts);
}
else {
const res = yield fetch(opts.url, opts);
const data = yield this.getResponseData(opts, res);
translatedResponse = this.translateResponse(opts, res, data);
}
if (!opts.validateStatus(translatedResponse.status)) {
throw new common_1.GaxiosError(`Request failed with status code ${translatedResponse.status}`, opts, translatedResponse);
}
return translatedResponse;
}
catch (e) {
const err = e;
err.config = opts;
const { shouldRetry, config } = yield retry_1.getRetryConfig(e);
if (shouldRetry && config) {
err.config.retryConfig.currentRetryAttempt =
config.retryConfig.currentRetryAttempt;
return this.request(err.config);
}
throw err;
}
});
}
getResponseData(opts, res) {
return __awaiter(this, void 0, void 0, function* () {
switch (opts.responseType) {
case 'stream':
return res.body;
case 'json':
let data = yield res.text();
try {
data = JSON.parse(data);
}
catch (e) {
}
return data;
case 'arraybuffer':
return res.arrayBuffer();
case 'blob':
return res.blob();
default:
return res.text();
}
});
}
/**
* Validates the options, and merges them with defaults.
* @param opts The original options passed from the client.
*/
validateOpts(options) {
const opts = extend(true, {}, this.defaults, options);
if (!opts.url) {
throw new Error('URL is required.');
}
// baseUrl has been deprecated, remove in 2.0
const baseUrl = opts.baseUrl || opts.baseURL;
if (baseUrl) {
opts.url = baseUrl + opts.url;
}
const parsedUrl = new URL(opts.url);
opts.url = `${parsedUrl.origin}${parsedUrl.pathname}`;
opts.params = extend(qs.parse(parsedUrl.search.substr(1)), // removes leading ?
opts.params);
opts.paramsSerializer = opts.paramsSerializer || this.paramsSerializer;
if (opts.params) {
parsedUrl.search = opts.paramsSerializer(opts.params);
}
opts.url = parsedUrl.href;
if (typeof options.maxContentLength === 'number') {
opts.size = options.maxContentLength;
}
if (typeof options.maxRedirects === 'number') {
opts.follow = options.maxRedirects;
}
opts.headers = opts.headers || {};
if (opts.data) {
if (this.isReadableStream(opts.data)) {
opts.body = opts.data;
}
else if (typeof opts.data === 'object') {
opts.body = JSON.stringify(opts.data);
opts.headers['Content-Type'] = 'application/json';
}
else {
opts.body = opts.data;
}
}
opts.validateStatus = opts.validateStatus || this.validateStatus;
opts.responseType = opts.responseType || 'json';
if (!opts.headers['Accept'] && opts.responseType === 'json') {
opts.headers['Accept'] = 'application/json';
}
opts.method = opts.method || 'GET';
const proxy = loadProxy();
if (proxy) {
if (this.agentCache.has(proxy)) {
opts.agent = this.agentCache.get(proxy);
}
else {
opts.agent = new HttpsProxyAgent(proxy);
this.agentCache.set(proxy, opts.agent);
}
}
return opts;
}
/**
* By default, throw for any non-2xx status code
* @param status status code from the HTTP response
*/
validateStatus(status) {
return status >= 200 && status < 300;
}
/**
* Encode a set of key/value pars into a querystring format (?foo=bar&baz=boo)
* @param params key value pars to encode
*/
paramsSerializer(params) {
return qs.stringify(params);
}
isReadableStream(obj) {
return obj instanceof stream.Readable && typeof obj._read === 'function';
}
translateResponse(opts, res, data) {
// headers need to be converted from a map to an obj
const headers = {};
res.headers.forEach((value, key) => {
headers[key] = value;
});
return {
config: opts,
data: data,
headers,
status: res.status,
statusText: res.statusText
};
}
}
exports.Gaxios = Gaxios;
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