Servlets (pandora 1.3.2 API)

java.lang.Object
- net.turnbig.pandora.web.Servlets

```
public class Servlets
extends Object
```
Http与Servlet工具类.

Author:

calvin

Field Summary

Fields
Modifier and Type Field and Description

static long ONE_YEAR_SECONDS

Fields
Modifier and Type	Field and Description
`static long`	`ONE_YEAR_SECONDS`

Constructor Summary

Constructors
Constructor and Description

Servlets()

Constructors
Constructor and Description
`Servlets()`

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method and Description
`static boolean`	`checkIfModifiedSince(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response, long lastModified)` 根据浏览器If-Modified-Since Header, 计算文件是否已被修改.
`static boolean`	`checkIfNoneMatchEtag(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response, String etag)` 根据浏览器 If-None-Match Header, 计算Etag是否已无效.
`static String`	`encodeHttpBasic(String userName, String password)` 客户端对Http Basic验证的 Header进行编码.
`static String`	`encodeParameterStringWithPrefix(Map<String,Object> params, String prefix)` 组合Parameters生成Query String的Parameter部分, 并在paramter name上加上prefix.
`static String`	`getBasePath(javax.servlet.http.HttpServletRequest request)` http://domain:port/context/related-path
`static String`	`getHost(javax.servlet.http.HttpServletRequest request)`
`static String`	`getIp(javax.servlet.http.HttpServletRequest request)`
`static Map<String,Object>`	`getParameters(javax.servlet.ServletRequest request)` 取得Request Parameters, copy from spring WebUtils.
`static Map<String,Object>`	`getParametersStartingWith(javax.servlet.ServletRequest request, String prefix)` 取得带相同前缀的Request Parameters, copy from spring WebUtils.
`static String`	`getRelatedpath(javax.servlet.http.HttpServletRequest request)` http://domain:port/context/related-path
`static void`	`output(javax.servlet.http.HttpServletResponse response, String contentType, String content)`
`static void`	`setEtag(javax.servlet.http.HttpServletResponse response, String etag)` 设置Etag Header.
`static void`	`setExpiresHeader(javax.servlet.http.HttpServletResponse response, long expiresSeconds)` 设置客户端缓存过期时间的Header.
`static void`	`setFileDownloadHeader(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response, String fileName)` 设置让浏览器弹出下载对话框的Header.
`static void`	`setLastModifiedHeader(javax.servlet.http.HttpServletResponse response, long lastModifiedDate)` 设置LastModified Header.
`static void`	`setNoCacheHeader(javax.servlet.http.HttpServletResponse response)` 设置禁止客户端缓存的Header.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail
- ONE_YEAR_SECONDS
```
public static final long ONE_YEAR_SECONDS
```
  See Also:
  
  Constant Field Values

Constructor Detail
- Servlets
```
public Servlets()
```

Method Detail

setExpiresHeader

public static void setExpiresHeader(javax.servlet.http.HttpServletResponse response,
                                    long expiresSeconds)

设置客户端缓存过期时间的Header.

setNoCacheHeader

public static void setNoCacheHeader(javax.servlet.http.HttpServletResponse response)

设置禁止客户端缓存的Header.

setLastModifiedHeader

public static void setLastModifiedHeader(javax.servlet.http.HttpServletResponse response,
                                         long lastModifiedDate)

设置LastModified Header.

setEtag

public static void setEtag(javax.servlet.http.HttpServletResponse response,
                           String etag)

设置Etag Header.

checkIfModifiedSince

public static boolean checkIfModifiedSince(javax.servlet.http.HttpServletRequest request,
                                           javax.servlet.http.HttpServletResponse response,
                                           long lastModified)

根据浏览器If-Modified-Since Header, 计算文件是否已被修改. 如果无修改, checkIfModify返回false ,设置304 not modify status.

Parameters:: lastModified - 内容的最后修改时间.

checkIfNoneMatchEtag

public static boolean checkIfNoneMatchEtag(javax.servlet.http.HttpServletRequest request,
                                           javax.servlet.http.HttpServletResponse response,
                                           String etag)

根据浏览器 If-None-Match Header, 计算Etag是否已无效. 如果Etag有效, checkIfNoneMatch返回false, 设置304 not modify status.

Parameters:: etag - 内容的ETag.

setFileDownloadHeader

public static void setFileDownloadHeader(javax.servlet.http.HttpServletRequest request,
                                         javax.servlet.http.HttpServletResponse response,
                                         String fileName)

设置让浏览器弹出下载对话框的Header.

Parameters:: fileName - 下载后的文件名.

getParametersStartingWith

public static Map<String,Object> getParametersStartingWith(javax.servlet.ServletRequest request,
                                                           String prefix)

取得带相同前缀的Request Parameters, copy from spring WebUtils. 返回的结果的Parameter名已去除前缀.

getParameters
```
public static Map<String,Object> getParameters(javax.servlet.ServletRequest request)
```
取得Request Parameters, copy from spring WebUtils. 返回的结果的Parameter

encodeParameterStringWithPrefix

public static String encodeParameterStringWithPrefix(Map<String,Object> params,
                                                     String prefix)

组合Parameters生成Query String的Parameter部分, 并在paramter name上加上prefix.

See Also:: getParametersStartingWith(javax.servlet.ServletRequest, java.lang.String)

encodeHttpBasic

public static String encodeHttpBasic(String userName,
                                     String password)

客户端对Http Basic验证的 Header进行编码.

getBasePath
```
public static String getBasePath(javax.servlet.http.HttpServletRequest request)
```
http://domain:port/context/related-path

Parameters:

request -

Returns:

http://domain:port/context

getRelatedpath
```
public static String getRelatedpath(javax.servlet.http.HttpServletRequest request)
```
http://domain:port/context/related-path

Parameters:

request -

Returns:

related-path

getHost

public static String getHost(javax.servlet.http.HttpServletRequest request)

getIp

public static String getIp(javax.servlet.http.HttpServletRequest request)

output

public static void output(javax.servlet.http.HttpServletResponse response,
                          String contentType,
                          String content)
                   throws IOException

Throws:: IOException

Class Servlets

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

ONE_YEAR_SECONDS

Constructor Detail

Servlets