294 lines
11 KiB
JavaScript
294 lines
11 KiB
JavaScript
// vim: et:ts=4:sw=4:sts=4:ft=javascript
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/*@
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Ox.Request <o> Basic request handler object
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FIXME: options is not a property, just documenting defaults
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options <o> Options object
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timeout <n|60000> request timeout
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type <s|"POST"> request type, possible values POST, GET, PUT, DELETE
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url <s> request url
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@*/
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Ox.Request = function(options) {
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var cache = {},
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//dfd = $.Deferred(),
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pending = {},
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requests = {},
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self = {
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options: Ox.extend({
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timeout: 60000,
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type: 'POST',
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url: '/api/'
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}, options)
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};
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return {
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/*@
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cancel <f> cancel pending requests
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() -> <u> cancel all requests
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(fn) -> <u> cancel all requests where function returns true
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(id) -> <u> cancel request by id
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@*/
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cancel: function() {
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if (arguments.length == 0) {
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// cancel all requests
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requests = {};
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} else if (Ox.isFunction(arguments[0])) {
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// cancel with function
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Ox.forEach(requests, function(req, id) {
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if (arguments[0](req)) {
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delete requests[id];
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}
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});
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} else {
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// cancel by id
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delete requests[arguments[0]];
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}
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},
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/*@
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clearCache <f> clear cached results
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() -> <u> ...
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@*/
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clearCache: function(query) {
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if (!query) {
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cache = {};
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} else {
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cache = Ox.filter(cache, function(val, key) {
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return key.indexOf(query) == -1;
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});
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}
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},
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_leakCache: function() {
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return cache;
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},
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/*@
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options <f> get/set options
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() -> <o> get options
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(options) -> <o> set options
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options <o> Options Object
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@*/
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options: function(options) {
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return Ox.getset(self.options, options, function() {}, this);
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},
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/*@
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requests <f> pending requests
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() -> <n> returns number of requests
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@*/
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requests: function() {
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return Ox.len(requests);
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},
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/*@
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send <f> send request
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(options) -> <n> returns request id
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options <o> Options Object
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age <n|-1> cache age
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id <n|Ox.uid()> request id
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timeout <n|self.options.timeout> overwrite default timeout
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type <n|self.options.timeout> overwrite default type
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url <n|self.options.timeout> overwrite default url
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@*/
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send: function(options) {
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var options = Ox.extend({
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age: -1,
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callback: null,
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id: Ox.uid(),
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timeout: self.options.timeout,
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type: self.options.type,
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url: self.options.url
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}, options),
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req = JSON.stringify({
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url: options.url,
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data: options.data
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});
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if (pending[options.id]) {
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setTimeout(function() {
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Ox.Request.send(options);
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}, 0);
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} else {
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requests[options.id] = {
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url: options.url,
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data: options.data
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};
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if (cache[req] && (
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options.age == -1
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|| options.age > +new Date() - cache[req].time
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)) {
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var data = cache[req].data;
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setTimeout(function() {
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callback && callback(data);
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}, 0);
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} else {
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pending[options.id] = true;
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$.ajax({
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complete: complete,
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data: options.data,
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//dataType: 'json',
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timeout: options.timeout,
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type: options.type,
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url: options.url
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});
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}
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}
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function callback(data) {
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if (requests[options.id]) {
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delete requests[options.id];
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options.callback && options.callback(data);
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}
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}
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function debug(request) {
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var $iframe = $('<iframe>')
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.css({ // fixme: should go into a class
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width: 768,
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height: 384
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}),
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$dialog = Ox.Dialog({
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title: 'Application Error',
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buttons: [
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Ox.Button({
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title: 'Close'
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})
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.bindEvent({
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click: function() {
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$dialog.close();
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}
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})
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],
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content: $iframe,
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width: 768,
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height: 384
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})
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.open(),
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iframe = $iframe[0].contentDocument || $iframe[0].contentWindow.document;
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iframe.open();
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iframe.write(request.responseText);
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iframe.close();
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}
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function complete(request) {
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var data;
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try {
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data = JSON.parse(request.responseText);
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} catch (err) {
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try {
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data = {
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status: {
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code: request.status,
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text: request.statusText
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}
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};
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} catch (err) {
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data = {
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status: {
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code: '500',
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text: 'Unknown Error'
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}
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};
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}
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}
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if (
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data.status.code == 200
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|| data.status.code == 404
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|| data.status.code == 409
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) {
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// we have to include not found and conflict
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// so that handlers can handle these cases
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cache[req] = {
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data: data,
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time: Ox.getTime()
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};
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callback(data);
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} else if (data.status.code == 401 || data.status.code == 403) {
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// unauthorized or forbidden
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var $dialog = Ox.Dialog({
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buttons: [
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Ox.Button({
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id: 'close',
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title: 'Close'
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})
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.bindEvent({
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click: function() {
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$dialog.close();
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}
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})
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],
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content: Ox.Element()
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.append(
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$('<img>')
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.attr({src: Ox.UI.PATH + 'png/icon128.png'})
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.css({position: 'absolute', left: '16px', top: '16px', width: '64px', height: '64px'})
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)
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.append(
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Ox.Element()
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.css({position: 'absolute', left: '96px', top: '16px', width: '256px'})
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.html('Sorry, you have made an unauthorized request.')
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),
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height: 192,
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keys: {enter: 'close', escape: 'close'},
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title: Ox.toTitleCase(data.status.text),
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width: 368
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})
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.open();
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} else {
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// 0 (timeout) or 500 (error)
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var $dialog = Ox.Dialog({
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buttons: [
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Ox.Button({
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id: 'details',
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title: 'Details'
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})
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.bindEvent({
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click: function() {
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$dialog.close(function() {
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debug(request);
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});
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}
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}),
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Ox.Button({
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id: 'close',
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title: 'Close'
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})
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.bindEvent({
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click: function() {
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$dialog.close();
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}
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})
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],
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content: Ox.Element()
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.append(
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$('<img>')
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.attr({src: Ox.UI.PATH + 'png/icon128.png'})
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.css({position: 'absolute', left: '16px', top: '16px', width: '64px', height: '64px'})
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)
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.append(
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Ox.Element()
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.css({position: 'absolute', left: '96px', top: '16px', width: '256px'})
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.html('Sorry, we have encountered an application error while handling your request. To help us find out what went wrong, you may want to report this error to an administrator. Otherwise, please try again later.')
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),
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height: 192,
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keys: {enter: 'close', escape: 'close'},
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title: 'Application Error',
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width: 368
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})
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.open();
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// fixme: change this to Send / Don't Send
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}
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pending[options.id] = false;
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}
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// return dfd.promise();
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return options.id;
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}
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};
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}();
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