921 lines
21 KiB
JavaScript
921 lines
21 KiB
JavaScript
/**
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* Root reference for iframes.
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*/
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var root;
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if (typeof window !== 'undefined') { // Browser window
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root = window;
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} else if (typeof self !== 'undefined') { // Web Worker
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root = self;
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} else { // Other environments
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console.warn("Using browser-only version of superagent in non-browser environment");
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root = this;
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}
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var Emitter = require('component-emitter');
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var RequestBase = require('./request-base');
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var isObject = require('./is-object');
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var ResponseBase = require('./response-base');
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var Agent = require('./agent-base');
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/**
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* Noop.
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*/
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function noop(){};
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/**
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* Expose `request`.
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*/
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var request = exports = module.exports = function(method, url) {
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// callback
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if ('function' == typeof url) {
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return new exports.Request('GET', method).end(url);
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}
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// url first
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if (1 == arguments.length) {
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return new exports.Request('GET', method);
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}
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return new exports.Request(method, url);
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}
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exports.Request = Request;
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/**
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* Determine XHR.
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*/
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request.getXHR = function () {
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if (root.XMLHttpRequest
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&& (!root.location || 'file:' != root.location.protocol
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|| !root.ActiveXObject)) {
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return new XMLHttpRequest;
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} else {
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try { return new ActiveXObject('Microsoft.XMLHTTP'); } catch(e) {}
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try { return new ActiveXObject('Msxml2.XMLHTTP.6.0'); } catch(e) {}
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try { return new ActiveXObject('Msxml2.XMLHTTP.3.0'); } catch(e) {}
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try { return new ActiveXObject('Msxml2.XMLHTTP'); } catch(e) {}
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}
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throw Error("Browser-only version of superagent could not find XHR");
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};
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/**
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* Removes leading and trailing whitespace, added to support IE.
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*
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* @param {String} s
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* @return {String}
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* @api private
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*/
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var trim = ''.trim
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? function(s) { return s.trim(); }
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: function(s) { return s.replace(/(^\s*|\s*$)/g, ''); };
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/**
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* Serialize the given `obj`.
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*
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* @param {Object} obj
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* @return {String}
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* @api private
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*/
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function serialize(obj) {
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if (!isObject(obj)) return obj;
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var pairs = [];
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for (var key in obj) {
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pushEncodedKeyValuePair(pairs, key, obj[key]);
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}
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return pairs.join('&');
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}
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/**
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* Helps 'serialize' with serializing arrays.
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* Mutates the pairs array.
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*
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* @param {Array} pairs
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* @param {String} key
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* @param {Mixed} val
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*/
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function pushEncodedKeyValuePair(pairs, key, val) {
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if (val != null) {
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if (Array.isArray(val)) {
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val.forEach(function(v) {
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pushEncodedKeyValuePair(pairs, key, v);
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});
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} else if (isObject(val)) {
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for(var subkey in val) {
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pushEncodedKeyValuePair(pairs, key + '[' + subkey + ']', val[subkey]);
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}
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} else {
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pairs.push(encodeURIComponent(key)
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+ '=' + encodeURIComponent(val));
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}
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} else if (val === null) {
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pairs.push(encodeURIComponent(key));
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}
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}
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/**
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* Expose serialization method.
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*/
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request.serializeObject = serialize;
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/**
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* Parse the given x-www-form-urlencoded `str`.
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*
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* @param {String} str
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* @return {Object}
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* @api private
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*/
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function parseString(str) {
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var obj = {};
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var pairs = str.split('&');
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var pair;
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var pos;
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for (var i = 0, len = pairs.length; i < len; ++i) {
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pair = pairs[i];
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pos = pair.indexOf('=');
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if (pos == -1) {
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obj[decodeURIComponent(pair)] = '';
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} else {
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obj[decodeURIComponent(pair.slice(0, pos))] =
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decodeURIComponent(pair.slice(pos + 1));
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}
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}
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return obj;
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}
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/**
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* Expose parser.
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*/
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request.parseString = parseString;
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/**
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* Default MIME type map.
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*
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* superagent.types.xml = 'application/xml';
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*
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*/
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request.types = {
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html: 'text/html',
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json: 'application/json',
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xml: 'text/xml',
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urlencoded: 'application/x-www-form-urlencoded',
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'form': 'application/x-www-form-urlencoded',
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'form-data': 'application/x-www-form-urlencoded'
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};
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/**
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* Default serialization map.
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*
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* superagent.serialize['application/xml'] = function(obj){
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* return 'generated xml here';
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* };
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*
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*/
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request.serialize = {
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'application/x-www-form-urlencoded': serialize,
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'application/json': JSON.stringify,
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};
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/**
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* Default parsers.
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*
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* superagent.parse['application/xml'] = function(str){
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* return { object parsed from str };
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* };
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*
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*/
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request.parse = {
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'application/x-www-form-urlencoded': parseString,
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'application/json': JSON.parse,
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};
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/**
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* Parse the given header `str` into
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* an object containing the mapped fields.
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*
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* @param {String} str
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* @return {Object}
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* @api private
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*/
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function parseHeader(str) {
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var lines = str.split(/\r?\n/);
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var fields = {};
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var index;
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var line;
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var field;
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var val;
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for (var i = 0, len = lines.length; i < len; ++i) {
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line = lines[i];
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index = line.indexOf(':');
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if (index === -1) { // could be empty line, just skip it
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continue;
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}
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field = line.slice(0, index).toLowerCase();
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val = trim(line.slice(index + 1));
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fields[field] = val;
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}
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return fields;
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}
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/**
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* Check if `mime` is json or has +json structured syntax suffix.
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*
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* @param {String} mime
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* @return {Boolean}
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* @api private
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*/
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function isJSON(mime) {
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// should match /json or +json
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// but not /json-seq
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return /[\/+]json($|[^-\w])/.test(mime);
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}
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/**
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* Initialize a new `Response` with the given `xhr`.
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*
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* - set flags (.ok, .error, etc)
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* - parse header
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*
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* Examples:
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*
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* Aliasing `superagent` as `request` is nice:
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*
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* request = superagent;
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*
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* We can use the promise-like API, or pass callbacks:
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*
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* request.get('/').end(function(res){});
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* request.get('/', function(res){});
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*
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* Sending data can be chained:
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*
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* request
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* .post('/user')
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* .send({ name: 'tj' })
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* .end(function(res){});
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*
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* Or passed to `.send()`:
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*
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* request
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* .post('/user')
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* .send({ name: 'tj' }, function(res){});
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*
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* Or passed to `.post()`:
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*
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* request
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* .post('/user', { name: 'tj' })
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* .end(function(res){});
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*
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* Or further reduced to a single call for simple cases:
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*
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* request
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* .post('/user', { name: 'tj' }, function(res){});
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*
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* @param {XMLHTTPRequest} xhr
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* @param {Object} options
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* @api private
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*/
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function Response(req) {
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this.req = req;
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this.xhr = this.req.xhr;
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// responseText is accessible only if responseType is '' or 'text' and on older browsers
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this.text = ((this.req.method !='HEAD' && (this.xhr.responseType === '' || this.xhr.responseType === 'text')) || typeof this.xhr.responseType === 'undefined')
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? this.xhr.responseText
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: null;
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this.statusText = this.req.xhr.statusText;
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var status = this.xhr.status;
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// handle IE9 bug: http://stackoverflow.com/questions/10046972/msie-returns-status-code-of-1223-for-ajax-request
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if (status === 1223) {
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status = 204;
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}
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this._setStatusProperties(status);
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this.header = this.headers = parseHeader(this.xhr.getAllResponseHeaders());
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// getAllResponseHeaders sometimes falsely returns "" for CORS requests, but
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// getResponseHeader still works. so we get content-type even if getting
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// other headers fails.
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this.header['content-type'] = this.xhr.getResponseHeader('content-type');
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this._setHeaderProperties(this.header);
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if (null === this.text && req._responseType) {
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this.body = this.xhr.response;
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} else {
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this.body = this.req.method != 'HEAD'
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? this._parseBody(this.text ? this.text : this.xhr.response)
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: null;
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}
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}
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ResponseBase(Response.prototype);
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/**
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* Parse the given body `str`.
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*
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* Used for auto-parsing of bodies. Parsers
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* are defined on the `superagent.parse` object.
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*
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* @param {String} str
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* @return {Mixed}
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* @api private
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*/
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Response.prototype._parseBody = function(str) {
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var parse = request.parse[this.type];
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if (this.req._parser) {
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return this.req._parser(this, str);
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}
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if (!parse && isJSON(this.type)) {
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parse = request.parse['application/json'];
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}
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return parse && str && (str.length || str instanceof Object)
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? parse(str)
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: null;
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};
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/**
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* Return an `Error` representative of this response.
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*
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* @return {Error}
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* @api public
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*/
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Response.prototype.toError = function(){
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var req = this.req;
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var method = req.method;
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var url = req.url;
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var msg = 'cannot ' + method + ' ' + url + ' (' + this.status + ')';
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var err = new Error(msg);
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err.status = this.status;
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err.method = method;
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err.url = url;
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return err;
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};
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/**
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* Expose `Response`.
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*/
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request.Response = Response;
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/**
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* Initialize a new `Request` with the given `method` and `url`.
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*
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* @param {String} method
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* @param {String} url
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* @api public
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*/
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function Request(method, url) {
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var self = this;
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this._query = this._query || [];
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this.method = method;
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this.url = url;
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this.header = {}; // preserves header name case
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this._header = {}; // coerces header names to lowercase
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this.on('end', function(){
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var err = null;
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var res = null;
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try {
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res = new Response(self);
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} catch(e) {
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err = new Error('Parser is unable to parse the response');
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err.parse = true;
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err.original = e;
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// issue #675: return the raw response if the response parsing fails
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if (self.xhr) {
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// ie9 doesn't have 'response' property
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err.rawResponse = typeof self.xhr.responseType == 'undefined' ? self.xhr.responseText : self.xhr.response;
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// issue #876: return the http status code if the response parsing fails
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err.status = self.xhr.status ? self.xhr.status : null;
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err.statusCode = err.status; // backwards-compat only
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} else {
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err.rawResponse = null;
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err.status = null;
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}
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return self.callback(err);
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}
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self.emit('response', res);
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var new_err;
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try {
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if (!self._isResponseOK(res)) {
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new_err = new Error(res.statusText || 'Unsuccessful HTTP response');
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}
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} catch(custom_err) {
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new_err = custom_err; // ok() callback can throw
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}
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// #1000 don't catch errors from the callback to avoid double calling it
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if (new_err) {
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new_err.original = err;
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new_err.response = res;
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new_err.status = res.status;
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self.callback(new_err, res);
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} else {
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self.callback(null, res);
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}
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});
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}
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/**
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* Mixin `Emitter` and `RequestBase`.
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*/
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Emitter(Request.prototype);
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RequestBase(Request.prototype);
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/**
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* Set Content-Type to `type`, mapping values from `request.types`.
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*
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* Examples:
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*
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* superagent.types.xml = 'application/xml';
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*
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* request.post('/')
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* .type('xml')
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* .send(xmlstring)
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* .end(callback);
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*
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* request.post('/')
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* .type('application/xml')
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* .send(xmlstring)
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* .end(callback);
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*
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* @param {String} type
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* @return {Request} for chaining
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* @api public
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*/
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Request.prototype.type = function(type){
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this.set('Content-Type', request.types[type] || type);
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return this;
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};
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/**
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* Set Accept to `type`, mapping values from `request.types`.
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*
|
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* Examples:
|
|
*
|
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* superagent.types.json = 'application/json';
|
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*
|
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* request.get('/agent')
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* .accept('json')
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* .end(callback);
|
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*
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* request.get('/agent')
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* .accept('application/json')
|
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* .end(callback);
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*
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* @param {String} accept
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* @return {Request} for chaining
|
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* @api public
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*/
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|
|
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Request.prototype.accept = function(type){
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this.set('Accept', request.types[type] || type);
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return this;
|
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};
|
|
|
|
/**
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* Set Authorization field value with `user` and `pass`.
|
|
*
|
|
* @param {String} user
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|
* @param {String} [pass] optional in case of using 'bearer' as type
|
|
* @param {Object} options with 'type' property 'auto', 'basic' or 'bearer' (default 'basic')
|
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* @return {Request} for chaining
|
|
* @api public
|
|
*/
|
|
|
|
Request.prototype.auth = function(user, pass, options){
|
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if (1 === arguments.length) pass = '';
|
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if (typeof pass === 'object' && pass !== null) { // pass is optional and can be replaced with options
|
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options = pass;
|
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pass = '';
|
|
}
|
|
if (!options) {
|
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options = {
|
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type: 'function' === typeof btoa ? 'basic' : 'auto',
|
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};
|
|
}
|
|
|
|
var encoder = function(string) {
|
|
if ('function' === typeof btoa) {
|
|
return btoa(string);
|
|
}
|
|
throw new Error('Cannot use basic auth, btoa is not a function');
|
|
};
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|
|
|
return this._auth(user, pass, options, encoder);
|
|
};
|
|
|
|
/**
|
|
* Add query-string `val`.
|
|
*
|
|
* Examples:
|
|
*
|
|
* request.get('/shoes')
|
|
* .query('size=10')
|
|
* .query({ color: 'blue' })
|
|
*
|
|
* @param {Object|String} val
|
|
* @return {Request} for chaining
|
|
* @api public
|
|
*/
|
|
|
|
Request.prototype.query = function(val){
|
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if ('string' != typeof val) val = serialize(val);
|
|
if (val) this._query.push(val);
|
|
return this;
|
|
};
|
|
|
|
/**
|
|
* Queue the given `file` as an attachment to the specified `field`,
|
|
* with optional `options` (or filename).
|
|
*
|
|
* ``` js
|
|
* request.post('/upload')
|
|
* .attach('content', new Blob(['<a id="a"><b id="b">hey!</b></a>'], { type: "text/html"}))
|
|
* .end(callback);
|
|
* ```
|
|
*
|
|
* @param {String} field
|
|
* @param {Blob|File} file
|
|
* @param {String|Object} options
|
|
* @return {Request} for chaining
|
|
* @api public
|
|
*/
|
|
|
|
Request.prototype.attach = function(field, file, options){
|
|
if (file) {
|
|
if (this._data) {
|
|
throw Error("superagent can't mix .send() and .attach()");
|
|
}
|
|
|
|
this._getFormData().append(field, file, options || file.name);
|
|
}
|
|
return this;
|
|
};
|
|
|
|
Request.prototype._getFormData = function(){
|
|
if (!this._formData) {
|
|
this._formData = new root.FormData();
|
|
}
|
|
return this._formData;
|
|
};
|
|
|
|
/**
|
|
* Invoke the callback with `err` and `res`
|
|
* and handle arity check.
|
|
*
|
|
* @param {Error} err
|
|
* @param {Response} res
|
|
* @api private
|
|
*/
|
|
|
|
Request.prototype.callback = function(err, res){
|
|
if (this._shouldRetry(err, res)) {
|
|
return this._retry();
|
|
}
|
|
|
|
var fn = this._callback;
|
|
this.clearTimeout();
|
|
|
|
if (err) {
|
|
if (this._maxRetries) err.retries = this._retries - 1;
|
|
this.emit('error', err);
|
|
}
|
|
|
|
fn(err, res);
|
|
};
|
|
|
|
/**
|
|
* Invoke callback with x-domain error.
|
|
*
|
|
* @api private
|
|
*/
|
|
|
|
Request.prototype.crossDomainError = function(){
|
|
var err = new Error('Request has been terminated\nPossible causes: the network is offline, Origin is not allowed by Access-Control-Allow-Origin, the page is being unloaded, etc.');
|
|
err.crossDomain = true;
|
|
|
|
err.status = this.status;
|
|
err.method = this.method;
|
|
err.url = this.url;
|
|
|
|
this.callback(err);
|
|
};
|
|
|
|
// This only warns, because the request is still likely to work
|
|
Request.prototype.buffer = Request.prototype.ca = Request.prototype.agent = function(){
|
|
console.warn("This is not supported in browser version of superagent");
|
|
return this;
|
|
};
|
|
|
|
// This throws, because it can't send/receive data as expected
|
|
Request.prototype.pipe = Request.prototype.write = function(){
|
|
throw Error("Streaming is not supported in browser version of superagent");
|
|
};
|
|
|
|
/**
|
|
* Check if `obj` is a host object,
|
|
* we don't want to serialize these :)
|
|
*
|
|
* @param {Object} obj
|
|
* @return {Boolean}
|
|
* @api private
|
|
*/
|
|
Request.prototype._isHost = function _isHost(obj) {
|
|
// Native objects stringify to [object File], [object Blob], [object FormData], etc.
|
|
return obj && 'object' === typeof obj && !Array.isArray(obj) && Object.prototype.toString.call(obj) !== '[object Object]';
|
|
}
|
|
|
|
/**
|
|
* Initiate request, invoking callback `fn(res)`
|
|
* with an instanceof `Response`.
|
|
*
|
|
* @param {Function} fn
|
|
* @return {Request} for chaining
|
|
* @api public
|
|
*/
|
|
|
|
Request.prototype.end = function(fn){
|
|
if (this._endCalled) {
|
|
console.warn("Warning: .end() was called twice. This is not supported in superagent");
|
|
}
|
|
this._endCalled = true;
|
|
|
|
// store callback
|
|
this._callback = fn || noop;
|
|
|
|
// querystring
|
|
this._finalizeQueryString();
|
|
|
|
return this._end();
|
|
};
|
|
|
|
Request.prototype._end = function() {
|
|
var self = this;
|
|
var xhr = (this.xhr = request.getXHR());
|
|
var data = this._formData || this._data;
|
|
|
|
this._setTimeouts();
|
|
|
|
// state change
|
|
xhr.onreadystatechange = function(){
|
|
var readyState = xhr.readyState;
|
|
if (readyState >= 2 && self._responseTimeoutTimer) {
|
|
clearTimeout(self._responseTimeoutTimer);
|
|
}
|
|
if (4 != readyState) {
|
|
return;
|
|
}
|
|
|
|
// In IE9, reads to any property (e.g. status) off of an aborted XHR will
|
|
// result in the error "Could not complete the operation due to error c00c023f"
|
|
var status;
|
|
try { status = xhr.status } catch(e) { status = 0; }
|
|
|
|
if (!status) {
|
|
if (self.timedout || self._aborted) return;
|
|
return self.crossDomainError();
|
|
}
|
|
self.emit('end');
|
|
};
|
|
|
|
// progress
|
|
var handleProgress = function(direction, e) {
|
|
if (e.total > 0) {
|
|
e.percent = e.loaded / e.total * 100;
|
|
}
|
|
e.direction = direction;
|
|
self.emit('progress', e);
|
|
};
|
|
if (this.hasListeners('progress')) {
|
|
try {
|
|
xhr.onprogress = handleProgress.bind(null, 'download');
|
|
if (xhr.upload) {
|
|
xhr.upload.onprogress = handleProgress.bind(null, 'upload');
|
|
}
|
|
} catch(e) {
|
|
// Accessing xhr.upload fails in IE from a web worker, so just pretend it doesn't exist.
|
|
// Reported here:
|
|
// https://connect.microsoft.com/IE/feedback/details/837245/xmlhttprequest-upload-throws-invalid-argument-when-used-from-web-worker-context
|
|
}
|
|
}
|
|
|
|
// initiate request
|
|
try {
|
|
if (this.username && this.password) {
|
|
xhr.open(this.method, this.url, true, this.username, this.password);
|
|
} else {
|
|
xhr.open(this.method, this.url, true);
|
|
}
|
|
} catch (err) {
|
|
// see #1149
|
|
return this.callback(err);
|
|
}
|
|
|
|
// CORS
|
|
if (this._withCredentials) xhr.withCredentials = true;
|
|
|
|
// body
|
|
if (!this._formData && 'GET' != this.method && 'HEAD' != this.method && 'string' != typeof data && !this._isHost(data)) {
|
|
// serialize stuff
|
|
var contentType = this._header['content-type'];
|
|
var serialize = this._serializer || request.serialize[contentType ? contentType.split(';')[0] : ''];
|
|
if (!serialize && isJSON(contentType)) {
|
|
serialize = request.serialize['application/json'];
|
|
}
|
|
if (serialize) data = serialize(data);
|
|
}
|
|
|
|
// set header fields
|
|
for (var field in this.header) {
|
|
if (null == this.header[field]) continue;
|
|
|
|
if (this.header.hasOwnProperty(field))
|
|
xhr.setRequestHeader(field, this.header[field]);
|
|
}
|
|
|
|
if (this._responseType) {
|
|
xhr.responseType = this._responseType;
|
|
}
|
|
|
|
// send stuff
|
|
this.emit('request', this);
|
|
|
|
// IE11 xhr.send(undefined) sends 'undefined' string as POST payload (instead of nothing)
|
|
// We need null here if data is undefined
|
|
xhr.send(typeof data !== 'undefined' ? data : null);
|
|
return this;
|
|
};
|
|
|
|
request.agent = function() {
|
|
return new Agent();
|
|
};
|
|
|
|
["GET", "POST", "OPTIONS", "PATCH", "PUT", "DELETE"].forEach(function(method) {
|
|
Agent.prototype[method.toLowerCase()] = function(url, fn) {
|
|
var req = new request.Request(method, url);
|
|
this._setDefaults(req);
|
|
if (fn) {
|
|
req.end(fn);
|
|
}
|
|
return req;
|
|
};
|
|
});
|
|
|
|
Agent.prototype.del = Agent.prototype['delete'];
|
|
|
|
/**
|
|
* GET `url` with optional callback `fn(res)`.
|
|
*
|
|
* @param {String} url
|
|
* @param {Mixed|Function} [data] or fn
|
|
* @param {Function} [fn]
|
|
* @return {Request}
|
|
* @api public
|
|
*/
|
|
|
|
request.get = function(url, data, fn) {
|
|
var req = request('GET', url);
|
|
if ('function' == typeof data) (fn = data), (data = null);
|
|
if (data) req.query(data);
|
|
if (fn) req.end(fn);
|
|
return req;
|
|
};
|
|
|
|
/**
|
|
* HEAD `url` with optional callback `fn(res)`.
|
|
*
|
|
* @param {String} url
|
|
* @param {Mixed|Function} [data] or fn
|
|
* @param {Function} [fn]
|
|
* @return {Request}
|
|
* @api public
|
|
*/
|
|
|
|
request.head = function(url, data, fn) {
|
|
var req = request('HEAD', url);
|
|
if ('function' == typeof data) (fn = data), (data = null);
|
|
if (data) req.query(data);
|
|
if (fn) req.end(fn);
|
|
return req;
|
|
};
|
|
|
|
/**
|
|
* OPTIONS query to `url` with optional callback `fn(res)`.
|
|
*
|
|
* @param {String} url
|
|
* @param {Mixed|Function} [data] or fn
|
|
* @param {Function} [fn]
|
|
* @return {Request}
|
|
* @api public
|
|
*/
|
|
|
|
request.options = function(url, data, fn) {
|
|
var req = request('OPTIONS', url);
|
|
if ('function' == typeof data) (fn = data), (data = null);
|
|
if (data) req.send(data);
|
|
if (fn) req.end(fn);
|
|
return req;
|
|
};
|
|
|
|
/**
|
|
* DELETE `url` with optional `data` and callback `fn(res)`.
|
|
*
|
|
* @param {String} url
|
|
* @param {Mixed} [data]
|
|
* @param {Function} [fn]
|
|
* @return {Request}
|
|
* @api public
|
|
*/
|
|
|
|
function del(url, data, fn) {
|
|
var req = request('DELETE', url);
|
|
if ('function' == typeof data) (fn = data), (data = null);
|
|
if (data) req.send(data);
|
|
if (fn) req.end(fn);
|
|
return req;
|
|
}
|
|
|
|
request['del'] = del;
|
|
request['delete'] = del;
|
|
|
|
/**
|
|
* PATCH `url` with optional `data` and callback `fn(res)`.
|
|
*
|
|
* @param {String} url
|
|
* @param {Mixed} [data]
|
|
* @param {Function} [fn]
|
|
* @return {Request}
|
|
* @api public
|
|
*/
|
|
|
|
request.patch = function(url, data, fn) {
|
|
var req = request('PATCH', url);
|
|
if ('function' == typeof data) (fn = data), (data = null);
|
|
if (data) req.send(data);
|
|
if (fn) req.end(fn);
|
|
return req;
|
|
};
|
|
|
|
/**
|
|
* POST `url` with optional `data` and callback `fn(res)`.
|
|
*
|
|
* @param {String} url
|
|
* @param {Mixed} [data]
|
|
* @param {Function} [fn]
|
|
* @return {Request}
|
|
* @api public
|
|
*/
|
|
|
|
request.post = function(url, data, fn) {
|
|
var req = request('POST', url);
|
|
if ('function' == typeof data) (fn = data), (data = null);
|
|
if (data) req.send(data);
|
|
if (fn) req.end(fn);
|
|
return req;
|
|
};
|
|
|
|
/**
|
|
* PUT `url` with optional `data` and callback `fn(res)`.
|
|
*
|
|
* @param {String} url
|
|
* @param {Mixed|Function} [data] or fn
|
|
* @param {Function} [fn]
|
|
* @return {Request}
|
|
* @api public
|
|
*/
|
|
|
|
request.put = function(url, data, fn) {
|
|
var req = request('PUT', url);
|
|
if ('function' == typeof data) (fn = data), (data = null);
|
|
if (data) req.send(data);
|
|
if (fn) req.end(fn);
|
|
return req;
|
|
};
|