angular-cn/packages/zone.js/lib/extra/jsonp.ts

78 lines
2.7 KiB
TypeScript

/**
* @license
* Copyright Google Inc. All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
Zone.__load_patch('jsonp', (global: any, Zone: ZoneType, api: _ZonePrivate) => {
const noop = function() {};
// because jsonp is not a standard api, there are a lot of
// implementations, so zone.js just provide a helper util to
// patch the jsonp send and onSuccess/onError callback
// the options is an object which contains
// - jsonp, the jsonp object which hold the send function
// - sendFuncName, the name of the send function
// - successFuncName, success func name
// - failedFuncName, failed func name
(Zone as any)[Zone.__symbol__('jsonp')] = function patchJsonp(options: any) {
if (!options || !options.jsonp || !options.sendFuncName) {
return;
}
const noop = function() {};
[options.successFuncName, options.failedFuncName].forEach(methodName => {
if (!methodName) {
return;
}
const oriFunc = global[methodName];
if (oriFunc) {
api.patchMethod(global, methodName, (delegate: Function) => (self: any, args: any[]) => {
const task = global[api.symbol('jsonTask')];
if (task) {
task.callback = delegate;
return task.invoke.apply(self, args);
} else {
return delegate.apply(self, args);
}
});
} else {
Object.defineProperty(global, methodName, {
configurable: true,
enumerable: true,
get: function() {
return function() {
const task = global[api.symbol('jsonpTask')];
const target = this ? this : global;
const delegate = global[api.symbol(`jsonp${methodName}callback`)];
if (task) {
if (delegate) {
task.callback = delegate;
}
global[api.symbol('jsonpTask')] = undefined;
return task.invoke.apply(this, arguments);
} else {
if (delegate) {
return delegate.apply(this, arguments);
}
}
return null;
};
},
set: function(callback: Function) {
this[api.symbol(`jsonp${methodName}callback`)] = callback;
}
});
}
});
api.patchMethod(
options.jsonp, options.sendFuncName, (delegate: Function) => (self: any, args: any[]) => {
global[api.symbol('jsonpTask')] = Zone.current.scheduleMacroTask(
'jsonp', noop, {}, (task: Task) => { return delegate.apply(self, args); }, noop);
});
};
});