DiskFileItemFactory (Apache Tomcat 7.0.109 API Documentation)

java.lang.Object
- org.apache.tomcat.util.http.fileupload.disk.DiskFileItemFactory

All Implemented Interfaces:

FileItemFactory
```
public class DiskFileItemFactory
extends Object
implements FileItemFactory
```
The default FileItemFactory implementation. This implementation creates FileItem instances which keep their content either in memory, for smaller items, or in a temporary file on disk, for larger items. The size threshold, above which content will be stored on disk, is configurable, as is the directory in which temporary files will be created.

If not otherwise configured, the default configuration values are as follows:
- Size threshold is 10KB.
- Repository is the system default temp directory, as returned by System.getProperty("java.io.tmpdir").
NOTE: Files are created in the system default temp directory with predictable names. This means that a local attacker with write access to that directory can perform a TOUTOC attack to replace any uploaded file with a file of the attackers choice. The implications of this will depend on how the uploaded file is used but could be significant. When using this implementation in an environment with local, untrusted users, setRepository(File) MUST be used to configure a repository location that is not publicly writable. In a Servlet container the location identified by the ServletContext attribute java.servlet.context.tempdir may be used.

Temporary files, which are created for file items, should be deleted later on.
Since:

FileUpload 1.1

Field Summary

Fields
Modifier and Type Field and Description

static int DEFAULT_SIZE_THRESHOLD
The default threshold above which uploads will be stored on disk.

Fields
Modifier and Type	Field and Description
`static int`	`DEFAULT_SIZE_THRESHOLD` The default threshold above which uploads will be stored on disk.

Constructor Summary

Constructors
Constructor and Description
`DiskFileItemFactory()` Constructs an unconfigured instance of this class.
`DiskFileItemFactory(int sizeThreshold, File repository)` Constructs a preconfigured instance of this class.

Method Summary

Methods
Modifier and Type	Method and Description
`FileItem`	`createItem(String fieldName, String contentType, boolean isFormField, String fileName)` Create a new `DiskFileItem` instance from the supplied parameters and the local factory configuration.
`String`	`getDefaultCharset()` Returns the default charset for use when no explicit charset parameter is provided by the sender.
`File`	`getRepository()` Returns the directory used to temporarily store files that are larger than the configured size threshold.
`int`	`getSizeThreshold()` Returns the size threshold beyond which files are written directly to disk.
`void`	`setDefaultCharset(String pCharset)` Sets the default charset for use when no explicit charset parameter is provided by the sender.
`void`	`setRepository(File repository)` Sets the directory used to temporarily store files that are larger than the configured size threshold.
`void`	`setSizeThreshold(int sizeThreshold)` Sets the size threshold beyond which files are written directly to disk.

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

- Field Detail
  - DEFAULT_SIZE_THRESHOLD
```
public static final int DEFAULT_SIZE_THRESHOLD
```
    The default threshold above which uploads will be stored on disk.
    
    See Also:
    Constant Field Values
- Constructor Detail
  - DiskFileItemFactory
```
public DiskFileItemFactory()
```
    Constructs an unconfigured instance of this class. The resulting factory may be configured by calling the appropriate setter methods.
  - DiskFileItemFactory
```
public DiskFileItemFactory(int sizeThreshold,
                   File repository)
```
    Constructs a preconfigured instance of this class.
    
    Parameters:
    sizeThreshold - The threshold, in bytes, below which items will be retained in memory and above which they will be stored as a file.
    repository - The data repository, which is the directory in which files will be created, should the item size exceed the threshold.
- Method Detail
  - getRepository
```
public File getRepository()
```
    Returns the directory used to temporarily store files that are larger than the configured size threshold.
    
    Returns:
    The directory in which temporary files will be located.
    See Also:
    setRepository(java.io.File)
  - setRepository
```
public void setRepository(File repository)
```
    Sets the directory used to temporarily store files that are larger than the configured size threshold.
    
    Parameters:
    repository - The directory in which temporary files will be located.
    See Also:
    getRepository()
  - getSizeThreshold
```
public int getSizeThreshold()
```
    Returns the size threshold beyond which files are written directly to disk. The default value is 10240 bytes.
    
    Returns:
    The size threshold, in bytes.
    See Also:
    setSizeThreshold(int)
  - setSizeThreshold
```
public void setSizeThreshold(int sizeThreshold)
```
    Sets the size threshold beyond which files are written directly to disk.
    
    Parameters:
    sizeThreshold - The size threshold, in bytes.
    See Also:
    getSizeThreshold()
  - createItem
```
public FileItem createItem(String fieldName,
                  String contentType,
                  boolean isFormField,
                  String fileName)
```
    Create a new DiskFileItem instance from the supplied parameters and the local factory configuration.
    
    Specified by:
    
    createItem in interface FileItemFactory
    
    Parameters:
    fieldName - The name of the form field.
    contentType - The content type of the form field.
    isFormField - true if this is a plain form field; false otherwise.
    fileName - The name of the uploaded file, if any, as supplied by the browser or other client.
    
    Returns:
    The newly created file item.
  - getDefaultCharset
```
public String getDefaultCharset()
```
    Returns the default charset for use when no explicit charset parameter is provided by the sender.
    
    Returns:
    the default charset
  - setDefaultCharset
```
public void setDefaultCharset(String pCharset)
```
    Sets the default charset for use when no explicit charset parameter is provided by the sender.
    
    Parameters:
    pCharset - the default charset

Class DiskFileItemFactory

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

DEFAULT_SIZE_THRESHOLD

Constructor Detail

DiskFileItemFactory

DiskFileItemFactory

Method Detail

getRepository

setRepository

getSizeThreshold

setSizeThreshold

createItem

getDefaultCharset

setDefaultCharset