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'use strict';
var utils = require('./../utils');
var settle = require('./../core/settle');
var buildURL = require('./../helpers/buildURL');
var parseHeaders = require('./../helpers/parseHeaders');
var isURLSameOrigin = require('./../helpers/isURLSameOrigin');
var createError = require('../core/createError');
var btoa = (typeof window !== 'undefined' && window.btoa && window.btoa.bind(window)) || require('./../helpers/btoa');
module.exports = function xhrAdapter(config) {
return new Promise(function dispatchXhrRequest(resolve, reject) {
var requestData = config.data;
var requestHeaders = config.headers;
if (utils.isFormData(requestData)) {
delete requestHeaders['Content-Type']; // Let the browser set it
}
var request = new XMLHttpRequest();
var loadEvent = 'onreadystatechange';
var xDomain = false;
// For IE 8/9 CORS support
// Only supports POST and GET calls and doesn't returns the response headers.
// DON'T do this for testing b/c XMLHttpRequest is mocked, not XDomainRequest.
if (process.env.NODE_ENV !== 'test' &&
typeof window !== 'undefined' &&
window.XDomainRequest && !('withCredentials' in request) &&
!isURLSameOrigin(config.url)) {
request = new window.XDomainRequest();
loadEvent = 'onload';
xDomain = true;
request.onprogress = function handleProgress() {};
request.ontimeout = function handleTimeout() {};
}
// HTTP basic authentication
if (config.auth) {
var username = config.auth.username || '';
var password = config.auth.password || '';
requestHeaders.Authorization = 'Basic ' + btoa(username + ':' + password);
}
request.open(config.method.toUpperCase(), buildURL(config.url, config.params, config.paramsSerializer), true);
// Set the request timeout in MS
request.timeout = config.timeout;
// Listen for ready state
request[loadEvent] = function handleLoad() {
if (!request || (request.readyState !== 4 && !xDomain)) {
return;
}
// The request errored out and we didn't get a response, this will be
// handled by onerror instead
// With one exception: request that using file: protocol, most browsers
// will return status as 0 even though it's a successful request
if (request.status === 0 && !(request.responseURL && request.responseURL.indexOf('file:') === 0)) {
return;
}
// Prepare the response
var responseHeaders = 'getAllResponseHeaders' in request ? parseHeaders(request.getAllResponseHeaders()) : null;
var responseData = !config.responseType || config.responseType === 'text' ? request.responseText : request.response;
var response = {
data: responseData,
// IE sends 1223 instead of 204 (https://github.com/mzabriskie/axios/issues/201)
status: request.status === 1223 ? 204 : request.status,
statusText: request.status === 1223 ? 'No Content' : request.statusText,
headers: responseHeaders,
config: config,
request: request
};
settle(resolve, reject, response);
// Clean up request
request = null;
};
// Handle low level network errors
request.onerror = function handleError() {
// Real errors are hidden from us by the browser
// onerror should only fire if it's a network error
reject(createError('Network Error', config, null, request));
// Clean up request
request = null;
};
// Handle timeout
request.ontimeout = function handleTimeout() {
reject(createError('timeout of ' + config.timeout + 'ms exceeded', config, 'ECONNABORTED',
request));
// Clean up request
request = null;
};
// Add xsrf header
// This is only done if running in a standard browser environment.
// Specifically not if we're in a web worker, or react-native.
if (utils.isStandardBrowserEnv()) {
var cookies = require('./../helpers/cookies');
// Add xsrf header
var xsrfValue = (config.withCredentials || isURLSameOrigin(config.url)) && config.xsrfCookieName ?
cookies.read(config.xsrfCookieName) :
undefined;
if (xsrfValue) {
requestHeaders[config.xsrfHeaderName] = xsrfValue;
}
}
// Add headers to the request
if ('setRequestHeader' in request) {
utils.forEach(requestHeaders, function setRequestHeader(val, key) {
if (typeof requestData === 'undefined' && key.toLowerCase() === 'content-type') {
// Remove Content-Type if data is undefined
delete requestHeaders[key];
} else {
// Otherwise add header to the request
request.setRequestHeader(key, val);
}
});
}
// Add withCredentials to request if needed
if (config.withCredentials) {
request.withCredentials = true;
}
// Add responseType to request if needed
if (config.responseType) {
try {
request.responseType = config.responseType;
} catch (e) {
// Expected DOMException thrown by browsers not compatible XMLHttpRequest Level 2.
// But, this can be suppressed for 'json' type as it can be parsed by default 'transformResponse' function.
if (config.responseType !== 'json') {
throw e;
}
}
}
// Handle progress if needed
if (typeof config.onDownloadProgress === 'function') {
request.addEventListener('progress', config.onDownloadProgress);
}
// Not all browsers support upload events
if (typeof config.onUploadProgress === 'function' && request.upload) {
request.upload.addEventListener('progress', config.onUploadProgress);
}
if (config.cancelToken) {
// Handle cancellation
config.cancelToken.promise.then(function onCanceled(cancel) {
if (!request) {
return;
}
request.abort();
reject(cancel);
// Clean up request
request = null;
});
}
if (requestData === undefined) {
requestData = null;
}
// Send the request
request.send(requestData);
});
};
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