142 lines
2.7 KiB
JavaScript
142 lines
2.7 KiB
JavaScript
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/**
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* headers.js
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*
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* Headers class offers convenient helpers
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*/
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module.exports = Headers;
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/**
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* Headers class
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*
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* @param Object headers Response headers
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* @return Void
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*/
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function Headers(headers) {
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var self = this;
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this._headers = {};
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// Headers
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if (headers instanceof Headers) {
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headers = headers.raw();
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}
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// plain object
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for (var prop in headers) {
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if (!headers.hasOwnProperty(prop)) {
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continue;
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}
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if (typeof headers[prop] === 'string') {
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this.set(prop, headers[prop]);
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} else if (typeof headers[prop] === 'number' && !isNaN(headers[prop])) {
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this.set(prop, headers[prop].toString());
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} else if (Array.isArray(headers[prop])) {
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headers[prop].forEach(function(item) {
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self.append(prop, item.toString());
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});
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}
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}
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}
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/**
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* Return first header value given name
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*
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* @param String name Header name
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* @return Mixed
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*/
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Headers.prototype.get = function(name) {
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var list = this._headers[name.toLowerCase()];
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return list ? list[0] : null;
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};
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/**
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* Return all header values given name
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*
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* @param String name Header name
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* @return Array
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*/
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Headers.prototype.getAll = function(name) {
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if (!this.has(name)) {
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return [];
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}
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return this._headers[name.toLowerCase()];
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};
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/**
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* Iterate over all headers
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*
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* @param Function callback Executed for each item with parameters (value, name, thisArg)
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* @param Boolean thisArg `this` context for callback function
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* @return Void
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*/
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Headers.prototype.forEach = function(callback, thisArg) {
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Object.getOwnPropertyNames(this._headers).forEach(function(name) {
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this._headers[name].forEach(function(value) {
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callback.call(thisArg, value, name, this)
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}, this)
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}, this)
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}
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/**
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* Overwrite header values given name
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*
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* @param String name Header name
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* @param String value Header value
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* @return Void
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*/
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Headers.prototype.set = function(name, value) {
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this._headers[name.toLowerCase()] = [value];
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};
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/**
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* Append a value onto existing header
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*
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* @param String name Header name
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* @param String value Header value
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* @return Void
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*/
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Headers.prototype.append = function(name, value) {
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if (!this.has(name)) {
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this.set(name, value);
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return;
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}
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this._headers[name.toLowerCase()].push(value);
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};
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/**
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* Check for header name existence
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*
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* @param String name Header name
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* @return Boolean
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*/
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Headers.prototype.has = function(name) {
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return this._headers.hasOwnProperty(name.toLowerCase());
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};
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/**
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* Delete all header values given name
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*
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* @param String name Header name
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* @return Void
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*/
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Headers.prototype['delete'] = function(name) {
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delete this._headers[name.toLowerCase()];
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};
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/**
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* Return raw headers (non-spec api)
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*
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* @return Object
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*/
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Headers.prototype.raw = function() {
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return this._headers;
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};
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