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Context Module

The Context module is an encapsulation for http request and response. The Context module provides an Input object for user input which is the request and an Output object for output which is the response.

Context Object

Here are the functions encapsulated for input and output in the context object.

  • Redirect
  • Abort
  • WriteString
  • GetCookie
  • SetCookie

Context object is the parameter of a Filter function so that you can use a filter to manipulate it or finish the process in advance.

Input Object

The Input object is the encapsulation of request. Here are the implemented methods:

  • Protocol

Get request protocol. E.g.: HTTP/1.0

  • Uri

The RequestURI of request. E.g.: /hi

  • Url

The URL of request. E.g.:

  • Site

The combination of scheme and domain. E.g.:

  • Scheme

The request scheme. E.g.: http, https

  • Domain

The request domain. E.g.:

  • Host

The request domain. Same as Domain.

  • Method

The request method. It’s a standard http request method. E.g.: GET, POST,

  • Is

Test if it’s a http method. E.g.: Is("GET") will return true or false

  • IsAjax

Test if it’s a ajax request. Return true or false.

  • IsSecure

Test if the request is an https request. Return true or false.

  • IsWebsocket

Test if the request is a Websocket request. Return true or false.

  • IsUpload

Test if there a is file uploaded in the request. Return true or false.

  • IP

Return the IP of the requesting user. If the user is using a proxy, it will get the real IP recursively.

  • Proxy

Return all IP addresses of the proxy request.

  • Refer

Return the refer of the request.

  • SubDomains

Return the sub domains of the request. For example, request domain is, then this function returns blog.

  • Port

Return the port of request. E.g.: 8080

  • UserAgent

Return UserAgent of request. E.g.: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/31.0.1650.57 Safari/537.36

  • Param

Can be set in router config. Used to get those params. E.g.: Param(":id") return 12

  • Query

Return all params in GET and POST requests. This is similar as $_REQUEST in PHP

  • Header

Return request header. E.g.: Header("Accept-Language") will return the value in request header, E.g.: zh-CN,zh;q=0.8,en;q=0.6

  • Cookie

Return request Cookie. E.g.: Cookie("username") will return the value of username in cookies

  • Session

Return initialized session. It is the Session object in the session module of Beego. Return the related data stored on the server.

  • Body

Return request body. E.g.: in API application request sends JSON data and it can’t be retrieved by Query. You need to use Body to get the JSON data.

  • GetData

Get value of Data in Input

  • SetData

Set value of Data in Input. GetData and SetData is used to pass data from Filter to Controller.

Output Object

Output object is the encapsulation of response. Here are the implemented methods:

  • Header

Set response header. E.g.: Header("Server","beego")

  • Body

Set response body. E.g.: Body([]byte("astaxie"))

  • Cookie

Set response cookie. E.g.: Cookie("sessionID","beegoSessionID")

  • Json

Parse Data into JSON and call Body to return it.

  • Jsonp

Parse Data into JSONP and call Body to return it.

  • Xml

Parse Data into XML and call Body to return it.

  • Download

Pass in file path and output file.

  • ContentType

Set response ContentType

  • SetStatus

Set response status

  • Session

Set the value which will be stored on the server. E.g.: Session("username","astaxie"). Then it can be read later.

  • IsCachable

Test if it’s a cacheable status based on status.

  • IsEmpty

Test if output is empty based on status.

  • IsOk

Test if response is 200 based on status.

  • IsSuccessful

Test if response is successful based on status.

  • IsRedirect

Test if response is redirected based on status.

  • IsForbidden

Test if response is forbidden based on status.

  • IsNotFound

Test if response is forbidden based on status.

  • IsClientError

Test if response is client error based on status.

  • IsServerError

Test if response is server error based on status.

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