qwest-4.4.5

qwest/4.4.5/qwest.js

+/*! qwest 4.4.5 (https://github.com/pyrsmk/qwest) */
+
+module.exports = function() {
+
+	var global = typeof window != 'undefined' ? window : self,
+		pinkyswear = require('pinkyswear'),
+		jparam = require('jquery-param'),
+		defaultOptions = {},
+		// Default response type for XDR in auto mode
+		defaultXdrResponseType = 'json',
+		// Default data type
+		defaultDataType = 'post',
+		// Variables for limit mechanism
+		limit = null,
+		requests = 0,
+		request_stack = [],
+		// Get XMLHttpRequest object
+		getXHR = global.XMLHttpRequest? function(){
+			return new global.XMLHttpRequest();
+		}: function(){
+			return new ActiveXObject('Microsoft.XMLHTTP');
+		},
+		// Guess XHR version
+		xhr2 = (getXHR().responseType===''),
+
+	// Core function
+	qwest = function(method, url, data, options, before) {
+		// Format
+		method = method.toUpperCase();
+		data = data || null;
+		options = options || {};
+		for(var name in defaultOptions) {
+			if(!(name in options)) {
+				if(typeof defaultOptions[name] == 'object' && typeof options[name] == 'object') {
+					for(var name2 in defaultOptions[name]) {
+						options[name][name2] = defaultOptions[name][name2];
+					}
+				}
+				else {
+					options[name] = defaultOptions[name];
+				}
+			}
+		}
+
+		// Define variables
+		var nativeResponseParsing = false,
+			crossOrigin,
+			xhr,
+			xdr = false,
+			timeout,
+			aborted = false,
+			attempts = 0,
+			headers = {},
+			mimeTypes = {
+				text: '*/*',
+				xml: 'text/xml',
+				json: 'application/json',
+				post: 'application/x-www-form-urlencoded',
+				document: 'text/html'
+			},
+			accept = {
+				text: '*/*',
+				xml: 'application/xml; q=1.0, text/xml; q=0.8, */*; q=0.1',
+				json: 'application/json; q=1.0, text/*; q=0.8, */*; q=0.1'
+			},
+			i, j,
+			response,
+			sending = false,
+
+		// Create the promise
+		promise = pinkyswear(function(pinky) {
+			pinky.abort = function() {
+				if(!aborted) {
+					if(xhr && xhr.readyState != 4) { // https://stackoverflow.com/questions/7287706/ie-9-javascript-error-c00c023f
+						xhr.abort();
+					}
+					if(sending) {
+						--requests;
+						sending = false;
+					}
+					aborted = true;
+				}
+			};
+			pinky.send = function() {
+				// Prevent further send() calls
+				if(sending) {
+					return;
+				}
+				// Reached request limit, get out!
+				if(requests == limit) {
+					request_stack.push(pinky);
+					return;
+				}
+				// Verify if the request has not been previously aborted
+				if(aborted) {
+					if(request_stack.length) {
+						request_stack.shift().send();
+					}
+					return;
+				}
+				// The sending is running
+				++requests;
+				sending = true;
+				// Get XHR object
+				xhr = getXHR();
+				if(crossOrigin) {
+					if(!('withCredentials' in xhr) && global.XDomainRequest) {
+						xhr = new XDomainRequest(); // CORS with IE8/9
+						xdr = true;
+						if(method != 'GET' && method != 'POST') {
+							method = 'POST';
+						}
+					}
+				}
+				// Open connection
+				if(xdr) {
+					xhr.open(method, url);
+				}
+				else {
+					xhr.open(method, url, options.async, options.user, options.password);
+					if(xhr2 && options.async) {
+						xhr.withCredentials = options.withCredentials;
+					}
+				}
+				// Set headers
+				if(!xdr) {
+					for(var i in headers) {
+						if(headers[i]) {
+							xhr.setRequestHeader(i, headers[i]);
+						}
+					}
+				}
+				// Verify if the response type is supported by the current browser
+				if(xhr2 && options.responseType != 'auto') {
+					try {
+						xhr.responseType = options.responseType;
+						nativeResponseParsing = (xhr.responseType == options.responseType);
+					}
+					catch(e) {}
+				}
+				// Plug response handler
+				if(xhr2 || xdr) {
+					xhr.onload = handleResponse;
+					xhr.onerror = handleError;
+					// http://cypressnorth.com/programming/internet-explorer-aborting-ajax-requests-fixed/
+					if(xdr) {
+						xhr.onprogress = function() {};
+					}
+				}
+				else {
+					xhr.onreadystatechange = function() {
+						if(xhr.readyState == 4) {
+							handleResponse();
+						}
+					};
+				}
+				// Plug timeout
+				if(options.async) {
+					if('timeout' in xhr) {
+						xhr.timeout = options.timeout;
+						xhr.ontimeout = handleTimeout;
+					}
+					else {
+						timeout = setTimeout(handleTimeout, options.timeout);
+					}
+				}
+				// http://cypressnorth.com/programming/internet-explorer-aborting-ajax-requests-fixed/
+				else if(xdr) {
+					xhr.ontimeout = function() {};
+				}
+				// Override mime type to ensure the response is well parsed
+				if(options.responseType != 'auto' && 'overrideMimeType' in xhr) {
+					xhr.overrideMimeType(mimeTypes[options.responseType]);
+				}
+				// Run 'before' callback
+				if(before) {
+					before(xhr);
+				}
+				// Send request
+				if(xdr) {
+					// https://developer.mozilla.org/en-US/docs/Web/API/XDomainRequest
+					setTimeout(function() {
+						xhr.send(method != 'GET'? data : null);
+					}, 0);
+				}
+				else {
+					xhr.send(method != 'GET' ? data : null);
+				}
+			};
+			return pinky;
+		}),
+
+		// Handle the response
+		handleResponse = function() {
+			var i, responseType;
+			// Stop sending state
+			sending = false;
+			clearTimeout(timeout);
+			// Launch next stacked request
+			if(request_stack.length) {
+				request_stack.shift().send();
+			}
+			// Verify if the request has not been previously aborted
+			if(aborted) {
+				return;
+			}
+			// Decrease the number of requests
+			--requests;
+			// Handle response
+			try{
+				// Process response
+				if(nativeResponseParsing) {
+					if('response' in xhr && xhr.response === null) {
+						throw 'The request response is empty';
+					}
+					response = xhr.response;
+				}
+				else {
+					// Guess response type
+					responseType = options.responseType;
+					if(responseType == 'auto') {
+						if(xdr) {
+							responseType = defaultXdrResponseType;
+						}
+						else {
+							var ct = xhr.getResponseHeader('Content-Type') || '';
+							if(ct.indexOf(mimeTypes.json)>-1) {
+								responseType = 'json';
+							}
+							else if(ct.indexOf(mimeTypes.xml) > -1) {
+								responseType = 'xml';
+							}
+							else {
+								responseType = 'text';
+							}
+						}
+					}
+					// Handle response type
+					switch(responseType) {
+						case 'json':
+							if(xhr.responseText.length) {
+								try {
+									if('JSON' in global) {
+										response = JSON.parse(xhr.responseText);
+									}
+									else {
+										response = new Function('return (' + xhr.responseText + ')')();
+									}
+								}
+								catch(e) {
+									throw "Error while parsing JSON body : "+e;
+								}
+							}
+							break;
+						case 'xml':
+							// Based on jQuery's parseXML() function
+							try {
+								// Standard
+								if(global.DOMParser) {
+									response = (new DOMParser()).parseFromString(xhr.responseText,'text/xml');
+								}
+								// IE<9
+								else {
+									response = new ActiveXObject('Microsoft.XMLDOM');
+									response.async = 'false';
+									response.loadXML(xhr.responseText);
+								}
+							}
+							catch(e) {
+								response = undefined;
+							}
+							if(!response || !response.documentElement || response.getElementsByTagName('parsererror').length) {
+								throw 'Invalid XML';
+							}
+							break;
+						default:
+							response = xhr.responseText;
+					}
+				}
+				// Late status code verification to allow passing data when, per example, a 409 is returned
+				// --- https://stackoverflow.com/questions/10046972/msie-returns-status-code-of-1223-for-ajax-request
+				if('status' in xhr && !/^2|1223/.test(xhr.status)) {
+					throw xhr.status + ' (' + xhr.statusText + ')';
+				}
+				// Fulfilled
+				promise(true, [xhr, response]);
+			}
+			catch(e) {
+				// Rejected
+				promise(false, [e, xhr, response]);
+			}
+		},
+
+		// Handle errors
+		handleError = function(message) {
+			if(!aborted) {
+				message = typeof message == 'string' ? message : 'Connection aborted';
+				promise.abort();
+				promise(false, [new Error(message), xhr, null]);
+			}
+		},
+			
+		// Handle timeouts
+		handleTimeout = function() {
+			if(!aborted) {
+				if(!options.attempts || ++attempts != options.attempts) {
+					xhr.abort();
+					sending = false;
+					promise.send();
+				}
+				else {
+					handleError('Timeout (' + url + ')');
+				}
+			}
+		};
+
+		// Normalize options
+		options.async = 'async' in options ? !!options.async : true;
+		options.cache = 'cache' in options ? !!options.cache : false;
+		options.dataType = 'dataType' in options ? options.dataType.toLowerCase() : defaultDataType;
+		options.responseType = 'responseType' in options ? options.responseType.toLowerCase() : 'auto';
+		options.user = options.user || '';
+		options.password = options.password || '';
+		options.withCredentials = !!options.withCredentials;
+		options.timeout = 'timeout' in options ? parseInt(options.timeout, 10) : 30000;
+		options.attempts = 'attempts' in options ? parseInt(options.attempts, 10) : 1;
+
+		// Guess if we're dealing with a cross-origin request
+		i = url.match(/\/\/(.+?)\//);
+		crossOrigin = i && (i[1] ? i[1] != location.host : false);
+
+		// Prepare data
+		if('ArrayBuffer' in global && data instanceof ArrayBuffer) {
+			options.dataType = 'arraybuffer';
+		}
+		else if('Blob' in global && data instanceof Blob) {
+			options.dataType = 'blob';
+		}
+		else if('Document' in global && data instanceof Document) {
+			options.dataType = 'document';
+		}
+		else if('FormData' in global && data instanceof FormData) {
+			options.dataType = 'formdata';
+		}
+		if(data !== null) {
+			switch(options.dataType) {
+				case 'json':
+					data = JSON.stringify(data);
+					break;
+				case 'post':
+					data = jparam(data);
+			}
+		}
+
+		// Prepare headers
+		if(options.headers) {
+			var format = function(match,p1,p2) {
+				return p1 + p2.toUpperCase();
+			};
+			for(i in options.headers) {
+				headers[i.replace(/(^|-)([^-])/g,format)] = options.headers[i];
+			}
+		}
+		if(!('Content-Type' in headers) && method!='GET') {
+			if(options.dataType in mimeTypes) {
+				if(mimeTypes[options.dataType]) {
+					headers['Content-Type'] = mimeTypes[options.dataType];
+				}
+			}
+		}
+		if(!headers.Accept) {
+			headers.Accept = (options.responseType in accept) ? accept[options.responseType] : '*/*';
+		}
+		if(!crossOrigin && !('X-Requested-With' in headers)) { // (that header breaks in legacy browsers with CORS)
+			headers['X-Requested-With'] = 'XMLHttpRequest';
+		}
+		if(!options.cache && !('Cache-Control' in headers)) {
+			headers['Cache-Control'] = 'no-cache';
+		}
+
+		// Prepare URL
+		if(method == 'GET' && data && typeof data == 'string') {
+			url += (/\?/.test(url)?'&':'?') + data;
+		}
+
+		// Start the request
+		if(options.async) {
+			promise.send();
+		}
+
+		// Return promise
+		return promise;
+
+	};
+	
+	// Define external qwest object
+	var getNewPromise = function(q) {
+			// Prepare
+			var promises = [],
+				loading = 0,
+				values = [];
+			// Create a new promise to handle all requests
+			return pinkyswear(function(pinky) {
+				// Basic request method
+				var method_index = -1,
+					createMethod = function(method) {
+						return function(url, data, options, before) {
+							var index = ++method_index;
+							++loading;
+							promises.push(qwest(method, pinky.base + url, data, options, before).then(function(xhr, response) {
+								values[index] = arguments;
+								if(!--loading) {
+									pinky(true, values.length == 1 ? values[0] : [values]);
+								}
+							}, function() {
+								pinky(false, arguments);
+							}));
+							return pinky;
+						};
+					};
+				// Define external API
+				pinky.get = createMethod('GET');
+				pinky.post = createMethod('POST');
+				pinky.put = createMethod('PUT');
+				pinky['delete'] = createMethod('DELETE');
+				pinky['catch'] = function(f) {
+					return pinky.then(null, f);
+				};
+				pinky.complete = function(f) {
+					var func = function() {
+						f(); // otherwise arguments will be passed to the callback
+					};
+					return pinky.then(func, func);
+				};
+				pinky.map = function(type, url, data, options, before) {
+					return createMethod(type.toUpperCase()).call(this, url, data, options, before);
+				};
+				// Populate methods from external object
+				for(var prop in q) {
+					if(!(prop in pinky)) {
+						pinky[prop] = q[prop];
+					}
+				}
+				// Set last methods
+				pinky.send = function() {
+					for(var i=0, j=promises.length; i<j; ++i) {
+						promises[i].send();
+					}
+					return pinky;
+				};
+				pinky.abort = function() {
+					for(var i=0, j=promises.length; i<j; ++i) {
+						promises[i].abort();
+					}
+					return pinky;
+				};
+				return pinky;
+			});
+		},
+		q = {
+			base: '',
+			get: function() {
+				return getNewPromise(q).get.apply(this, arguments);
+			},
+			post: function() {
+				return getNewPromise(q).post.apply(this, arguments);
+			},
+			put: function() {
+				return getNewPromise(q).put.apply(this, arguments);
+			},
+			'delete': function() {
+				return getNewPromise(q)['delete'].apply(this, arguments);
+			},
+			map: function() {
+				return getNewPromise(q).map.apply(this, arguments);
+			},
+			xhr2: xhr2,
+			limit: function(by) {
+				limit = by;
+				return q;
+			},
+			setDefaultOptions: function(options) {
+				defaultOptions = options;
+				return q;
+			},
+			setDefaultXdrResponseType: function(type) {
+				defaultXdrResponseType = type.toLowerCase();
+				return q;
+			},
+			setDefaultDataType: function(type) {
+				defaultDataType = type.toLowerCase();
+				return q;
+			},
+			getOpenRequests: function() {
+				return requests;
+			}
+		};
+	
+	return q;
+
+}();

qwest/4.4.5/qwest.min.js

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