Grails，如何获取请求对象 [英] Grails, how to get the request object

问题描述

Grails有一个请求对象，它的定义是这里。

问题是当我尝试使用它时，我得到：

 没有这样的属性：请求类：xxx 
  

只产生了一个建议：

  import javax.servlet.http.HttpServletRequest 
 import org.springframework.web.context。 request.ServletRequestAttributes 
：
 def my（）{
 HttpServletRequest request =（（ServletRequestAttributes）RequestContextHolder.currentRequestAttributes（））。getRequest（）; 
} 
  

然而，这给出：

  groovy.lang.MissingPropertyException：No such property：RequestContextHolder for class：net.ohds.ReportService 
  

1. 如何在Grails中获取请求对象的句柄？


2. 您如何了解这一点？所以很少有人问这个问题，它必须记录在某个地方，或者在某些例子中，但我找不到。
>解决方案

在Grails 3.0中，从 service 获取请求对象：

grails-app / services / com / example / MyService.groovy

  import org.grails.web.util.WebUtils 
 ... 
 def request = WebUtils.retrieveGrailsWebRequest（）。getCurrentRequest（）
 def ip = request.getRemoteAddr（）
  

文档：

http://docs.grails.org/latest/api/org/grails/web/ util / WebUtils.html

注意：

旧的 codehaus 包已被弃用。

Grails has a request object which is defined here.

The problem is when I try to use it, I get:

No such property: request for class:xxx

Reading the first 100 hits googling this error only produced one suggestion:

import javax.servlet.http.HttpServletRequest
import org.springframework.web.context.request.ServletRequestAttributes
:
def my() {
    HttpServletRequest request = ((ServletRequestAttributes)RequestContextHolder.currentRequestAttributes()).getRequest();
}

However, this gives:

groovy.lang.MissingPropertyException: No such property: RequestContextHolder for class: net.ohds.ReportService

1. How does one get a handle on the request object in Grails?
2. How do you find out about this? So few people have asked this question, it must be documented somewhere, or in some example, but I can't find either.

解决方案

In Grails 3.0, from a service get the request object using:

grails-app/services/com/example/MyService.groovy

import org.grails.web.util.WebUtils
...
def request = WebUtils.retrieveGrailsWebRequest().getCurrentRequest()
def ip = request.getRemoteAddr()

Documentation:
http://docs.grails.org/latest/api/org/grails/web/util/WebUtils.html

Note:
The old codehaus package has been deprecated.

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