org.eclipse.jetty.servlets
类 MultiPartFilter

java.lang.Object
  org.eclipse.jetty.servlets.MultiPartFilter

所有已实现的接口：

Filter

public class MultiPartFilter
extends Object
implements Filter

Multipart Form Data Filter.

This class decodes the multipart/form-data stream sent by a HTML form that uses a file input item. Any files sent are stored to a temporary file and a File object added to the request as an attribute. All other values are made available via the normal getParameter API and the setCharacterEncoding mechanism is respected when converting bytes to Strings.

If the init parameter "delete" is set to "true", any files created will be deleted when the current request returns.

The init parameter maxFormKeys sets the maximum number of keys that may be present in a form (default set by system property org.eclipse.jetty.server.Request.maxFormKeys or 1000) to protect against DOS attacks by bad hash keys.

The init parameter deleteFiles controls if uploaded files are automatically deleted after the request completes. Use init parameter "maxFileSize" to set the max size file that can be uploaded. Use init parameter "maxRequestSize" to limit the size of the multipart request.

字段摘要

static String

CONTENT_TYPE_SUFFIX

构造方法摘要

MultiPartFilter()

方法摘要

void	destroy() Called by the web container to indicate to a filter that it is being taken out of service.
void	doFilter(ServletRequest request, ServletResponse response, FilterChain chain) The doFilter method of the Filter is called by the container each time a request/response pair is passed through the chain due to a client request for a resource at the end of the chain.
void	init(FilterConfig filterConfig) Called by the web container to indicate to a filter that it is being placed into service.

从类 java.lang.Object 继承的方法

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

字段详细信息

CONTENT_TYPE_SUFFIX

public static final String CONTENT_TYPE_SUFFIX

另请参见：

常量字段值

构造方法详细信息

MultiPartFilter

public MultiPartFilter()

方法详细信息

init

public void init(FilterConfig filterConfig)
          throws ServletException

从接口 Filter 复制的描述

Called by the web container to indicate to a filter that it is being placed into service.

The servlet container calls the init method exactly once after instantiating the filter. The init method must complete successfully before the filter is asked to do any filtering work.

The web container cannot place the filter into service if the init method either

1. Throws a ServletException
2. Does not return within a time period defined by the web container

指定者：

接口 Filter 中的 init

抛出：

ServletException

另请参见：

Filter.init(javax.servlet.FilterConfig)

doFilter

public void doFilter(ServletRequest request,
                     ServletResponse response,
                     FilterChain chain)
              throws IOException,
                     ServletException

从接口 Filter 复制的描述

The doFilter method of the Filter is called by the container each time a request/response pair is passed through the chain due to a client request for a resource at the end of the chain. The FilterChain passed in to this method allows the Filter to pass on the request and response to the next entity in the chain.

A typical implementation of this method would follow the following pattern:

1. Examine the request
2. Optionally wrap the request object with a custom implementation to filter content or headers for input filtering
3. Optionally wrap the response object with a custom implementation to filter content or headers for output filtering
4. • Either invoke the next entity in the chain using the FilterChain object (chain.doFilter()),
   • or not pass on the request/response pair to the next entity in the filter chain to block the request processing
5. Directly set headers on the response after invocation of the next entity in the filter chain.

指定者：

接口 Filter 中的 doFilter

抛出：

IOException

ServletException

另请参见：

Filter.doFilter(javax.servlet.ServletRequest, javax.servlet.ServletResponse, javax.servlet.FilterChain)

destroy

public void destroy()

从接口 Filter 复制的描述

Called by the web container to indicate to a filter that it is being taken out of service.

This method is only called once all threads within the filter's doFilter method have exited or after a timeout period has passed. After the web container calls this method, it will not call the doFilter method again on this instance of the filter.

This method gives the filter an opportunity to clean up any resources that are being held (for example, memory, file handles, threads) and make sure that any persistent state is synchronized with the filter's current state in memory.

指定者：

接口 Filter 中的 destroy

另请参见：

Filter.destroy()