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index.js
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index.js
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/**
* Copyright 2018 Google Inc. All Rights Reserved.
* 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.
*/
/**
* @public
* @typedef Options
* @property {string} [url] the URL to request
* @property {string} [method="get"] HTTP method, case-insensitive
* @property {Headers} [headers] Request headers
* @property {FormData|string|object} [body] a body, optionally encoded, to send
* @property {'text'|'json'|'stream'|'blob'|'arrayBuffer'|'formData'|'stream'} [responseType="text"] An encoding to use for the response
* @property {string} [auth] Authorization header value to send with the request
* @property {string} [xsrfCookieName] Pass an Cross-site Request Forgery prevention cookie value as a header defined by `xsrfHeaderName`
* @property {string} [xsrfHeaderName] The name of a header to use for passing XSRF cookies
* @property {(status: number) => boolean} [validateStatus] Override status code handling (default: 200-399 is a success)
* @property {Array<(body: any, headers: Headers) => any?>} [transformRequest] An array of transformations to apply to the outgoing request
*/
/**
* @public
* @typedef Headers
* @type {{[name: string]: string}}
*/
/**
* @public
* @typedef Response
* @property {Options} config the request configuration
* @property {any} data the decoded response body
*/
/** */
export default (function create(defaults) {
defaults = defaults || {};
/**
* Creates a request factory bound to the given HTTP method.
* @private
* @param {string} method
* @returns {(url: string, config?: Options) => Promise<Response>}
*/
function createBodylessMethod(method) {
return (url, config) => redaxios(url, Object.assign({ method }, config));
}
/**
* Creates a request factory bound to the given HTTP method.
* @private
* @param {string} method
* @returns {(url: string, body?: any, config?: Options) => Promise<Response>}
*/
function createBodyMethod(method) {
return (url, data, config) => redaxios(url, Object.assign({ method, data }, config));
}
/**
* @public
* @type {((config?: Options) => Promise<Response>) | ((url: string, config?: Options) => Promise<Response>)}
*/
redaxios.request = redaxios;
/** @public */
redaxios.get = createBodylessMethod('get');
/** @public */
redaxios.delete = createBodylessMethod('delete');
/** @public */
redaxios.options = createBodylessMethod('options');
/** @public */
redaxios.post = createBodyMethod('post');
/** @public */
redaxios.put = createBodyMethod('put');
/** @public */
redaxios.patch = createBodyMethod('patch');
/** @public */
redaxios.all = Promise.all;
/** @public */
redaxios.spread = function(fn) {
return function (results) {
return fn.apply(this, results);
};
};
function deepMerge(opts, overrides, lowerCase) {
if (Array.isArray(opts)) {
return opts.concat(overrides);
}
if (overrides && typeof overrides == 'object') {
let out = {}, i;
if (opts) {
for (i in opts) {
let key = lowerCase ? i.toLowerCase() : i;
out[key] = opts[i];
}
}
for (i in overrides) {
let key = lowerCase ? i.toLowerCase() : i;
if (key === 'headers') lowerCase = true;
out[key] = i in out ? deepMerge(out[key], overrides[i], lowerCase) : overrides[i];
}
return out;
}
return overrides;
}
/**
* Issues a request.
* @public
* @param {string} [url]
* @param {Options} [config]
* @returns {Promise<Response>}
*/
function redaxios(url, config) {
if (typeof url !== 'string') {
config = url;
url = config.url;
}
const options = deepMerge(defaults, config || {});
let data = options.data;
if (options.transformRequest) {
for (let i = 0; i < options.transformRequest.length; i++) {
let r = options.transformRequest[i](data, options.headers);
if (r !== undefined) {
data = r;
}
}
}
const customHeaders = {};
if (data && typeof data === 'object') {
data = JSON.stringify(data);
customHeaders['Content-Type'] = 'application/json';
}
if (options.xsrfCookieName) {
let parts = document.cookie.split(/ *[;=] */);
for (let i = 0; i < parts.length; i += 2) {
if (parts[i] == options.xsrfCookieName) {
customHeaders[options.xsrfHeaderName] = decodeURIComponent(parts[i+1]);
break;
}
}
}
if (options.auth) {
customHeaders.Authorization = options.auth;
}
/** @type {Response} */
const response = {};
response.config = config;
return fetch(url, {
method: options.method,
body: data,
headers: deepMerge(options.headers, customHeaders, true)
}).then((res) => {
let i;
for (i in res) {
if (typeof res[i] != 'function') response[i] = res[i];
}
if (!(options.validateStatus ? options.validateStatus(res.status) : res.ok)) {
return Promise.reject(res);
}
const withData = options.responseType === 'stream'
? Promise.resolve(res.body)
: res[options.responseType || 'text']();
return withData.then((data) => {
response.data = data;
return response;
});
});
}
redaxios.CancelToken = self.AbortController || Object;
redaxios.create = create;
return redaxios;
})();