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