> [Wiki](Home) ▸ [[API Reference|API-Reference]] ▸ [[Networking|Networking-API]] ▸ **Handler**
# Handler
> [`Source`](/Neft-io/neft/blob/896e26485d0b149407adb656828a9a4cc709823f/src/networking/handler.litcoffee)
## Table of contents
* [Handler](#handler)
* [**Class** Handler](#class-handler)
* [constructor](#constructor)
* [method](#method)
* [uri](#uri)
* [*Schema* Handler::schema = null](#schema-handlerschema--null)
* [callback](#callback)
* [exec](#exec)
* [toString](#tostring)
* [Glossary](#glossary)
# **Class** Handler
Represents a callback function called on the request.
Each handler must determine an uri, which is compared with the got request URI.
You should use `createHandler()` to create a functional handler.
Access it with:
```javascript
var Networking = require('networking');
var Handler = Networking.Handler;
```
> [`Source`](/Neft-io/neft/blob/896e26485d0b149407adb656828a9a4cc709823f/src/networking/handler.litcoffee)
##constructor
- Syntax
Handler::constructor(*Object* options)- Prototype method of
- Handler
- Parameters
> [`Source`](/Neft-io/neft/blob/896e26485d0b149407adb656828a9a4cc709823f/src/networking/handler.litcoffee#handlerconstructorobject-options)
##method
- Syntax
*String* Handler::method- Prototype property of
- Handler
- Type
- String
Describes which type of the request, this handler can handle.
> [`Source`](/Neft-io/neft/blob/896e26485d0b149407adb656828a9a4cc709823f/src/networking/handler.litcoffee#string-handlermethod)
##uri
- Syntax
*Networking.Uri* Handler::uri- Prototype property of
- Handler
- Type
- Networking.Uri
This property is compared with the request uri.
> [`Source`](/Neft-io/neft/blob/896e26485d0b149407adb656828a9a4cc709823f/src/networking/handler.litcoffee#networkinguri-handleruri)
## *Schema* Handler::schema = null
Used to determine whether the request uri is valid and can be handled by the handler callback.
> [`Source`](/Neft-io/neft/blob/896e26485d0b149407adb656828a9a4cc709823f/src/networking/handler.litcoffee)
##callback
- Syntax
*Function* Handler::callback- Prototype property of
- Handler
- Type
- Function
Function used to handle the request.
It's called with three parameters: [Networking.Request](/Neft-io/neft/wiki/Networking-Request-API#class-request), [Networking.Response](/Neft-io/neft/wiki/Networking-Response-API#class-response) and
a *next* function.
If the *next* function is called, the next handler is checked.
> [`Source`](/Neft-io/neft/blob/896e26485d0b149407adb656828a9a4cc709823f/src/networking/handler.litcoffee#function-handlercallback)
##exec
- Syntax
Handler::exec(*Networking.Request* request, *Networking.Response* response, *Function* next)- Prototype method of
- Handler
- Parameters
Executes the handler, that is:
- compares the uri with the request,
- validates the request uri with the schema,
- calls the handler callback.
It's internally called by the `createRequest()`.
> [`Source`](/Neft-io/neft/blob/896e26485d0b149407adb656828a9a4cc709823f/src/networking/handler.litcoffee#handlerexecnetworkingrequest-request-networkingresponse-response-function-next)
##toString
- Syntax
*String* Handler::toString()- Prototype method of
- Handler
- Returns
- String
Returns a string describing the handler.
```javascript
"get /users/{name}"
```
> [`Source`](/Neft-io/neft/blob/896e26485d0b149407adb656828a9a4cc709823f/src/networking/handler.litcoffee#string-handlertostring)
# Glossary
- [Networking.Handler](#class-handler)