skylark-utils
Version:
An Elegant HTML5 JavaScript Library.
282 lines (242 loc) • 9.84 kB
JavaScript
define([
"./skylark",
"./langx"
],function(skylark, langx){
var Deferred = langx.Deferred,
blankRE = /^\s*$/,
scriptTypeRE = /^(?:text|application)\/javascript/i,
xmlTypeRE = /^(?:text|application)\/xml/i;
function empty() {}
var ajaxSettings = {
// Default type of request
type: 'GET',
// Callback that is executed before request
beforeSend: empty,
// Callback that is executed if the request succeeds
success: empty,
// Callback that is executed the the server drops error
error: empty,
// Callback that is executed on request complete (both: error and success)
complete: empty,
// The context for the callbacks
context: null,
// Whether to trigger "global" Ajax events
global: true,
// Transport
xhr: function() {
return new window.XMLHttpRequest();
},
// MIME types mapping
// IIS returns Javascript as "application/x-javascript"
accepts: {
script: 'text/javascript, application/javascript, application/x-javascript',
json: 'application/json',
xml: 'application/xml, text/xml',
html: 'text/html',
text: 'text/plain'
},
// Whether the request is to another domain
crossDomain: false,
// Default timeout
timeout: 0,
// Whether data should be serialized to string
processData: true,
// Whether the browser should be allowed to cache GET responses
cache: true
}
function mimeToDataType(mime) {
if (mime) {
mime = mime.split(';', 2)[0];
}
return mime && (mime == 'text/html' ? 'html' :
mime == 'application/json' ? 'json' :
scriptTypeRE.test(mime) ? 'script' :
xmlTypeRE.test(mime) && 'xml') || 'text';
}
function appendQuery(url, query) {
if (query == '') {
return url;
}
return (url + '&' + query).replace(/[&?]{1,2}/, '?');
}
function serialize(params, obj, traditional, scope) {
var type, array = langx.isArray(obj),
hash = langx.isPlainObject(obj)
langx.each(obj, function(key, value) {
type = langx.type(value);
if (scope) {
key = traditional ? scope :
scope + '[' + (hash || type == 'object' || type == 'array' ? key : '') + ']' ;
}
// handle data in serializeArray() format
if (!scope && array) {
params.add(value.name, value.value);
// recurse into nested objects
} else if (type == "array" || (!traditional && type == "object")) {
serialize(params, value, traditional, key);
} else {
params.add(key, value);
}
})
}
function param(obj, traditional) {
var params = []
params.add = function(key, value) {
if (langx.isFunction(value)) {
value = value();
}
if (value == null) {
value = "";
}
this.push(escape(key) + '=' + escape(value));
}
serialize(params, obj, traditional);
return params.join('&').replace(/%20/g, '+')
}
// serialize payload and append it to the URL for GET requests
function serializeData(options) {
if (options.processData && options.data && !langx.isString(options.data)) {
options.data = $.param(options.data, options.traditional)
}
if (options.data && (!options.type || options.type.toUpperCase() == 'GET')) {
options.url = appendQuery(options.url, options.data);
options.data = undefined;
}
}
function ajaxSuccess(data, xhr, settings, deferred) {
var context = settings.context,
status = 'success'
settings.success.call(context, data, status, xhr)
//if (deferred) deferred.resolveWith(context, [data, status, xhr])
//triggerGlobal(settings, context, 'ajaxSuccess', [xhr, settings, data])
ajaxComplete(status, xhr, settings)
}
// type: "timeout", "error", "abort", "parsererror"
function ajaxError(error, type, xhr, settings, deferred) {
var context = settings.context
settings.error.call(context, xhr, type, error)
//if (deferred) deferred.rejectWith(context, [xhr, type, error])
//triggerGlobal(settings, context, 'ajaxError', [xhr, settings, error || type])
ajaxComplete(type, xhr, settings)
}
// status: "success", "notmodified", "error", "timeout", "abort", "parsererror"
function ajaxComplete(status, xhr, settings) {
var context = settings.context
settings.complete.call(context, xhr, status)
//triggerGlobal(settings, context, 'ajaxComplete', [xhr, settings])
//ajaxStop(settings)
}
function ajax(options) {
var settings = langx.mixin({}, options),
deferred = new Deferred();
langx.safeMixin(settings,ajaxSettings);
//ajaxStart(settings)
if (!settings.crossDomain) {
// settings.crossDomain = !langx.isSameOrigin(settings.url);
}
serializeData(settings);
var dataType = settings.dataType;
var mime = settings.accepts[dataType],
headers = {},
setHeader = function(name, value) { headers[name.toLowerCase()] = [name, value] },
protocol = /^([\w-]+:)\/\//.test(settings.url) ? RegExp.$1 : window.location.protocol,
xhr = settings.xhr(),
nativeSetHeader = xhr.setRequestHeader,
abortTimeout;
//if (deferred) deferred.promise(xhr)
if (!settings.crossDomain) {
setHeader('X-Requested-With', 'XMLHttpRequest');
}
setHeader('Accept', mime || '*/*')
if (mime = settings.mimeType || mime) {
if (mime.indexOf(',') > -1) mime = mime.split(',', 2)[0]
xhr.overrideMimeType && xhr.overrideMimeType(mime)
}
if (settings.contentType || (settings.contentType !== false && settings.data && settings.type.toUpperCase() != 'GET')) {
setHeader('Content-Type', settings.contentType || 'application/x-www-form-urlencoded')
}
if (settings.headers) {
for (name in settings.headers) {
setHeader(name, settings.headers[name]);
}
}
xhr.setRequestHeader = setHeader;
xhr.onreadystatechange = function() {
if (xhr.readyState == 4) {
xhr.onreadystatechange = empty
clearTimeout(abortTimeout)
var result, error = false
if ((xhr.status >= 200 && xhr.status < 300) || xhr.status == 304 || (xhr.status == 0 && protocol == 'file:')) {
dataType = dataType || mimeToDataType(settings.mimeType || xhr.getResponseHeader('content-type'))
result = xhr.responseText
try {
// http://perfectionkills.com/global-eval-what-are-the-options/
if (dataType == 'script') {
(1, eval)(result);
} else if (dataType == 'xml') {
result = xhr.responseXML
} else if (dataType == 'json') {
result = blankRE.test(result) ? null : JSON.parse(result);
}
} catch (e) {
error = e
}
if (error) {
ajaxError(error, 'parsererror', xhr, settings, deferred);
} else {
ajaxSuccess(result, xhr, settings, deferred);
}
} else {
ajaxError(xhr.statusText || null, xhr.status ? 'error' : 'abort', xhr, settings, deferred);
}
}
}
/*
if (ajaxBeforeSend(xhr, settings) === false) {
xhr.abort()
ajaxError(null, 'abort', xhr, settings, deferred)
return xhr
}
if (settings.xhrFields)
for (name in settings.xhrFields) xhr[name] = settings.xhrFields[name]
*/
var async = 'async' in settings ? settings.async : true
xhr.open(settings.type, settings.url, async, settings.username, settings.password)
for (name in headers) {
nativeSetHeader.apply(xhr, headers[name]);
}
if (settings.timeout > 0) {
abortTimeout = setTimeout(function() {
xhr.onreadystatechange = empty;
xhr.abort();
ajaxError(null, 'timeout', xhr, settings, deferred);
}, settings.timeout);
}
// avoid sending empty string (#319)
xhr.send(settings.data ? settings.data : null)
return xhr;
}
function get( /* url, data, success, dataType */ ) {
return ajax(parseArguments.apply(null, arguments))
}
function post( /* url, data, success, dataType */ ) {
var options = parseArguments.apply(null, arguments);
options.type = 'POST';
return ajax(options);
}
function getJSON( /* url, data, success */ ) {
var options = parseArguments.apply(null, arguments);
options.dataType = 'json';
return ajax(options);
}
function http(){
return http;
}
langx.mixin(http, {
ajax: ajax,
get: get,
gtJSON: getJSON,
post: post
});
return skylark.http = http;
});