javax.servlet.http.Part Maven / Gradle / Ivy
/*
* Copyright (c) 1997, 2018 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0, which is available at
* http://www.eclipse.org/legal/epl-2.0.
*
* This Source Code may also be made available under the following Secondary
* Licenses when the conditions for such availability set forth in the
* Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
* version 2 with the GNU Classpath Exception, which is available at
* https://www.gnu.org/software/classpath/license.html.
*
* SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
*/
package javax.servlet.http;
import java.io.*;
import java.util.*;
/**
* This class represents a part or form item that was received within a
* multipart/form-data POST request.
*
* @since Servlet 3.0
*/
public interface Part {
/**
* Gets the content of this part as an InputStream
*
* @return The content of this part as an InputStream
* @throws IOException If an error occurs in retrieving the content
* as an InputStream
*/
public InputStream getInputStream() throws IOException;
/**
* Gets the content type of this part.
*
* @return The content type of this part.
*/
public String getContentType();
/**
* Gets the name of this part
*
* @return The name of this part as a String
*/
public String getName();
/**
* Gets the file name specified by the client
*
* @return the submitted file name
*
* @since Servlet 3.1
*/
public String getSubmittedFileName();
/**
* Returns the size of this fille.
*
* @return a long specifying the size of this part, in bytes.
*/
public long getSize();
/**
* A convenience method to write this uploaded item to disk.
*
*
This method is not guaranteed to succeed if called more than once for
* the same part. This allows a particular implementation to use, for
* example, file renaming, where possible, rather than copying all of the
* underlying data, thus gaining a significant performance benefit.
*
* @param fileName The location into which the uploaded part should
be stored. The value may be a file name or a path. The actual
location of the file in the filesystem is relative to {@link
javax.servlet.MultipartConfigElement#getLocation()}. Absolute
paths are used as provided and are relative to
getLocation(). Note: that this is a system
dependent string and URI notation may not be acceptable on all
systems. For portability, this string should be generated with
the File or Path APIs.
*
* @throws IOException if an error occurs.
*/
public void write(String fileName) throws IOException;
/**
* Deletes the underlying storage for a file item, including deleting any
* associated temporary disk file.
*
* @throws IOException if an error occurs.
*/
public void delete() throws IOException;
/**
*
* Returns the value of the specified mime header
* as a String. If the Part did not include a header
* of the specified name, this method returns null.
* If there are multiple headers with the same name, this method
* returns the first header in the part.
* The header name is case insensitive. You can use
* this method with any request header.
*
* @param name a String specifying the
* header name
*
* @return a String containing the
* value of the requested
* header, or null
* if the part does not
* have a header of that name
*/
public String getHeader(String name);
/**
* Gets the values of the Part header with the given name.
*
*
Any changes to the returned Collection must not
* affect this Part.
*
*
Part header names are case insensitive.
*
* @param name the header name whose values to return
*
* @return a (possibly empty) Collection of the values of
* the header with the given name
*/
public Collection getHeaders(String name);
/**
* Gets the header names of this Part.
*
* Some servlet containers do not allow
* servlets to access headers using this method, in
* which case this method returns null
*
*
Any changes to the returned Collection must not
* affect this Part.
*
* @return a (possibly empty) Collection of the header
* names of this Part
*/
public Collection getHeaderNames();
}