angular2
Version:
Angular 2 - a web framework for modern web apps
135 lines • 15.7 kB
JavaScript
;"use strict";
var lang_1 = require('angular2/src/facade/lang');
var exceptions_1 = require('angular2/src/facade/exceptions');
var collection_1 = require('angular2/src/facade/collection');
/**
* Polyfill for [Headers](https://developer.mozilla.org/en-US/docs/Web/API/Headers/Headers), as
* specified in the [Fetch Spec](https://fetch.spec.whatwg.org/#headers-class).
*
* The only known difference between this `Headers` implementation and the spec is the
* lack of an `entries` method.
*
* ### Example ([live demo](http://plnkr.co/edit/MTdwT6?p=preview))
*
* ```
* import {Headers} from 'angular2/http';
*
* var firstHeaders = new Headers();
* firstHeaders.append('Content-Type', 'image/jpeg');
* console.log(firstHeaders.get('Content-Type')) //'image/jpeg'
*
* // Create headers from Plain Old JavaScript Object
* var secondHeaders = new Headers({
* 'X-My-Custom-Header': 'Angular'
* });
* console.log(secondHeaders.get('X-My-Custom-Header')); //'Angular'
*
* var thirdHeaders = new Headers(secondHeaders);
* console.log(thirdHeaders.get('X-My-Custom-Header')); //'Angular'
* ```
*/
var Headers = (function () {
function Headers(headers) {
var _this = this;
if (headers instanceof Headers) {
this._headersMap = headers._headersMap;
return;
}
this._headersMap = new collection_1.Map();
if (lang_1.isBlank(headers)) {
return;
}
// headers instanceof StringMap
collection_1.StringMapWrapper.forEach(headers, function (v, k) {
_this._headersMap.set(k, collection_1.isListLikeIterable(v) ? v : [v]);
});
}
/**
* Returns a new Headers instance from the given DOMString of Response Headers
*/
Headers.fromResponseHeaderString = function (headersString) {
return headersString.trim()
.split('\n')
.map(function (val) { return val.split(':'); })
.map(function (_a) {
var key = _a[0], parts = _a.slice(1);
return ([key.trim(), parts.join(':').trim()]);
})
.reduce(function (headers, _a) {
var key = _a[0], value = _a[1];
return !headers.set(key, value) && headers;
}, new Headers());
};
/**
* Appends a header to existing list of header values for a given header name.
*/
Headers.prototype.append = function (name, value) {
var mapName = this._headersMap.get(name);
var list = collection_1.isListLikeIterable(mapName) ? mapName : [];
list.push(value);
this._headersMap.set(name, list);
};
/**
* Deletes all header values for the given name.
*/
Headers.prototype.delete = function (name) { this._headersMap.delete(name); };
Headers.prototype.forEach = function (fn) {
this._headersMap.forEach(fn);
};
/**
* Returns first header that matches given name.
*/
Headers.prototype.get = function (header) { return collection_1.ListWrapper.first(this._headersMap.get(header)); };
/**
* Check for existence of header by given name.
*/
Headers.prototype.has = function (header) { return this._headersMap.has(header); };
/**
* Provides names of set headers
*/
Headers.prototype.keys = function () { return collection_1.MapWrapper.keys(this._headersMap); };
/**
* Sets or overrides header value for given name.
*/
Headers.prototype.set = function (header, value) {
var list = [];
if (collection_1.isListLikeIterable(value)) {
var pushValue = value.join(',');
list.push(pushValue);
}
else {
list.push(value);
}
this._headersMap.set(header, list);
};
/**
* Returns values of all headers.
*/
Headers.prototype.values = function () { return collection_1.MapWrapper.values(this._headersMap); };
/**
* Returns string of all headers.
*/
Headers.prototype.toJSON = function () {
var serializableHeaders = {};
this._headersMap.forEach(function (values, name) {
var list = [];
collection_1.iterateListLike(values, function (val) { return list = collection_1.ListWrapper.concat(list, val.split(',')); });
serializableHeaders[name] = list;
});
return serializableHeaders;
};
/**
* Returns list of header values for a given name.
*/
Headers.prototype.getAll = function (header) {
var headers = this._headersMap.get(header);
return collection_1.isListLikeIterable(headers) ? headers : [];
};
/**
* This method is not implemented.
*/
Headers.prototype.entries = function () { throw new exceptions_1.BaseException('"entries" method is not implemented on Headers class'); };
return Headers;
}());
exports.Headers = Headers;
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//'Angular'\n *\n * var thirdHeaders = new Headers(secondHeaders);\n * console.log(thirdHeaders.get('X-My-Custom-Header')); //'Angular'\n * ```\n */\nexport class Headers {\n  /** @internal */\n  _headersMap: Map<string, string[]>;\n  constructor(headers?: Headers | {[key: string]: any}) {\n    if (headers instanceof Headers) {\n      this._headersMap = (<Headers>headers)._headersMap;\n      return;\n    }\n\n    this._headersMap = new Map<string, string[]>();\n\n    if (isBlank(headers)) {\n      return;\n    }\n\n    // headers instanceof StringMap\n    StringMapWrapper.forEach(headers, (v: any, k: string) => {\n      this._headersMap.set(k, isListLikeIterable(v) ? v : [v]);\n    });\n  }\n\n  /**\n   * Returns a new Headers instance from the given DOMString of Response Headers\n   */\n  static fromResponseHeaderString(headersString: string): Headers {\n    return headersString.trim()\n        .split('\\n')\n        .map(val => val.split(':'))\n        .map(([key, ...parts]) => ([key.trim(), parts.join(':').trim()]))\n        .reduce((headers, [key, value]) => !headers.set(key, value) && headers, new Headers());\n  }\n\n  /**\n   * Appends a header to existing list of header values for a given header name.\n   */\n  append(name: string, value: string): void {\n    var mapName = this._headersMap.get(name);\n    var list = isListLikeIterable(mapName) ? mapName : [];\n    list.push(value);\n    this._headersMap.set(name, list);\n  }\n\n  /**\n   * Deletes all header values for the given name.\n   */\n  delete (name: string): void { this._headersMap.delete(name); }\n\n  forEach(fn: (values: string[], name: string, headers: Map<string, string[]>) => void): void {\n    this._headersMap.forEach(fn);\n  }\n\n  /**\n   * Returns first header that matches given name.\n   */\n  get(header: string): string { return ListWrapper.first(this._headersMap.get(header)); }\n\n  /**\n   * Check for existence of header by given name.\n   */\n  has(header: string): boolean { return this._headersMap.has(header); }\n\n  /**\n   * Provides names of set headers\n   */\n  keys(): string[] { return MapWrapper.keys(this._headersMap); }\n\n  /**\n   * Sets or overrides header value for given name.\n   */\n  set(header: string, value: string | string[]): void {\n    var list: string[] = [];\n\n    if (isListLikeIterable(value)) {\n      var pushValue = (<string[]>value).join(',');\n      list.push(pushValue);\n    } else {\n      list.push(<string>value);\n    }\n\n    this._headersMap.set(header, list);\n  }\n\n  /**\n   * Returns values of all headers.\n   */\n  values(): string[][] { return MapWrapper.values(this._headersMap); }\n\n  /**\n   * Returns string of all headers.\n   */\n  toJSON(): {[key: string]: any} {\n    let serializableHeaders = {};\n    this._headersMap.forEach((values: string[], name: string) => {\n      let list = [];\n\n      iterateListLike(values, val => list = ListWrapper.concat(list, val.split(',')));\n\n      serializableHeaders[name] = list;\n    });\n    return serializableHeaders;\n  }\n\n  /**\n   * Returns list of header values for a given name.\n   */\n  getAll(header: string): string[] {\n    var headers = this._headersMap.get(header);\n    return isListLikeIterable(headers) ? headers : [];\n  }\n\n  /**\n   * This method is not implemented.\n   */\n  entries() { throw new BaseException('\"entries\" method is not implemented on Headers class'); }\n}\n"]}