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## org.apache.commons.fileupload
Class FileUploadBase

    java.lang.Object
      org.apache.commons.fileupload.FileUploadBase

Direct Known Subclasses:
  DiskFileUpload, FileUpload

    public abstract class FileUploadBase

extends Object

High level API for processing file uploads.

This class handles multiple files per single HTML widget, sent using `multipart/mixed` encoding type, as specified by RFC 1867. Use `parseRequest(HttpServletRequest)` to acquire a list of `FileItem`s associated with a given HTML widget.

How the data for individual parts is stored is determined by the factory used to create them; a given part may be in memory, on disk, or somewhere else.

Version:
  $Id: FileUploadBase.java 963609 2010-07-13 06:56:47Z jochen $
Author:
  Rafal Krzewski, Daniel Rall, Jason van Zyl, John McNally, Martin Cooper, Sean C. Sullivan

Nested Class Summary
`static class` | `FileUploadBase.FileSizeLimitExceededException` Thrown to indicate that A files size exceeds the configured maximum.
`static class` | `FileUploadBase.FileUploadIOException` This exception is thrown for hiding an inner `FileUploadException` in an `IOException`.
`static class` | `FileUploadBase.InvalidContentTypeException` Thrown to indicate that the request is not a multipart request.
`static class` | `FileUploadBase.IOFileUploadException` Thrown to indicate an IOException.
`protected static class` | `FileUploadBase.SizeException` This exception is thrown, if a requests permitted size is exceeded.
`static class` | `FileUploadBase.SizeLimitExceededException` Thrown to indicate that the request size exceeds the configured maximum.
`static class` | `FileUploadBase.UnknownSizeException` Deprecated. As of commons-fileupload 1.2, the presence of a content-length header is no longer required.

Field Summary
`static String` | `ATTACHMENT` Content-disposition value for file attachment.
`static String` | `CONTENT_DISPOSITION` HTTP content disposition header name.
`static String` | `CONTENT_LENGTH` HTTP content length header name.
`static String` | `CONTENT_TYPE` HTTP content type header name.
`static String` | `FORM_DATA` Content-disposition value for form data.
`static int` | `MAX_HEADER_SIZE` Deprecated. This constant is no longer used. As of commons-fileupload 1.2, the only applicable limit is the total size of a parts headers, `MultipartStream.HEADER_PART_SIZE_MAX`.
`static String` | `MULTIPART` Part of HTTP content type header.
`static String` | `MULTIPART_FORM_DATA` HTTP content type header for multipart forms.
`static String` | `MULTIPART_MIXED` HTTP content type header for multiple uploads.

Constructor Summary
`FileUploadBase()`

Method Summary
`protected FileItem` | `createItem(Map headers, boolean isFormField)` Deprecated. This method is no longer used in favour of internally created instances of `FileItem`.
`protected byte[]` | `getBoundary(String contentType)` Retrieves the boundary from the `Content-type` header.
`protected String` | `getFieldName(FileItemHeaders headers)` Retrieves the field name from the `Content-disposition` header.
`protected String` | `getFieldName(Map headers)` Deprecated. Use `getFieldName(FileItemHeaders)`.
`abstract FileItemFactory` | `getFileItemFactory()` Returns the factory class used when creating file items.
`protected String` | `getFileName(FileItemHeaders headers)` Retrieves the file name from the `Content-disposition` header.
`protected String` | `getFileName(Map headers)` Deprecated. Use `getFileName(FileItemHeaders)`.
`long` | `getFileSizeMax()` Returns the maximum allowed size of a single uploaded file, as opposed to `getSizeMax()`.
`protected String` | `getHeader(Map headers, String name)` Deprecated. Use `FileItemHeaders.getHeader(String)`.
`String` | `getHeaderEncoding()` Retrieves the character encoding used when reading the headers of an individual part.
`FileItemIterator` | `getItemIterator(RequestContext ctx)` Processes an RFC 1867 compliant `multipart/form-data` stream.
`protected FileItemHeaders` | `getParsedHeaders(String headerPart)` Parses the `header-part` and returns as key/value pairs.
`ProgressListener` | `getProgressListener()` Returns the progress listener.
`long` | `getSizeMax()` Returns the maximum allowed size of a complete request, as opposed to `getFileSizeMax()`.
`static boolean` | `isMultipartContent(javax.servlet.http.HttpServletRequest req)` Deprecated. Use the method on `ServletFileUpload` instead.
`static boolean` | `isMultipartContent(RequestContext ctx)` Utility method that determines whether the request contains multipart content.
`protected FileItemHeadersImpl` | `newFileItemHeaders()` Creates a new instance of `FileItemHeaders`.
`protected Map` | `parseHeaders(String headerPart)` Deprecated. Use `getParsedHeaders(String)`
`List` | `parseRequest(javax.servlet.http.HttpServletRequest req)` Deprecated. Use the method in `ServletFileUpload` instead.
`List` | `parseRequest(RequestContext ctx)` Processes an RFC 1867 compliant `multipart/form-data` stream.
`abstract void` | `setFileItemFactory(FileItemFactory factory)` Sets the factory class to use when creating file items.
`void` | `setFileSizeMax(long fileSizeMax)` Sets the maximum allowed size of a single uploaded file, as opposed to `getSizeMax()`.
`void` | `setHeaderEncoding(String encoding)` Specifies the character encoding to be used when reading the headers of individual part.
`void` | `setProgressListener(ProgressListener pListener)` Sets the progress listener.
`void` | `setSizeMax(long sizeMax)` Sets the maximum allowed size of a complete request, as opposed to `setFileSizeMax(long)`.

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

Field Detail

### CONTENT_TYPE

    public static final String CONTENT_TYPE

  HTTP content type header name.

  See Also:
    Constant Field Values

### CONTENT_DISPOSITION

    public static final String CONTENT_DISPOSITION

  HTTP content disposition header name.

  See Also:
    Constant Field Values

### CONTENT_LENGTH

    public static final String CONTENT_LENGTH

  HTTP content length header name.

  See Also:
    Constant Field Values

### FORM_DATA

    public static final String FORM_DATA

  Content-disposition value for form data.

  See Also:
    Constant Field Values

### ATTACHMENT

    public static final String ATTACHMENT

  Content-disposition value for file attachment.

  See Also:
    Constant Field Values

### MULTIPART

    public static final String MULTIPART

  Part of HTTP content type header.

  See Also:
    Constant Field Values

### MULTIPART_FORM_DATA

    public static final String MULTIPART_FORM_DATA

  HTTP content type header for multipart forms.

  See Also:
    Constant Field Values

### MULTIPART_MIXED

    public static final String MULTIPART_MIXED

  HTTP content type header for multiple uploads.

  See Also:
    Constant Field Values

### MAX_HEADER_SIZE

    public static final int MAX_HEADER_SIZE

  Deprecated. This constant is no longer used. As of commons-fileupload 1.2, the only applicable limit is the total size of a parts headers, `MultipartStream.HEADER_PART_SIZE_MAX`.
  The maximum length of a single header line that will be parsed (1024 bytes).

  See Also:
    Constant Field Values

Constructor Detail

### FileUploadBase

    public FileUploadBase()

Method Detail

### isMultipartContent

    public static final boolean isMultipartContent(RequestContext ctx)

  Utility method that determines whether the request contains multipart content.

  NOTE:This method will be moved to the `ServletFileUpload` class after the FileUpload 1.1 release. Unfortunately, since this method is static, it is not possible to provide its replacement until this method is removed.

  Parameters:
    `ctx` - The request context to be evaluated. Must be non-null.
  Returns:
    `true` if the request is multipart; `false` otherwise.

### isMultipartContent

    public static boolean isMultipartContent(javax.servlet.http.HttpServletRequest req)

  Deprecated. Use the method on `ServletFileUpload` instead.

  Utility method that determines whether the request contains multipart content.

  Parameters:
    `req` - The servlet request to be evaluated. Must be non-null.
  Returns:
    `true` if the request is multipart; `false` otherwise.

### getFileItemFactory

    public abstract FileItemFactory getFileItemFactory()

  Returns the factory class used when creating file items.

  Returns:
    The factory class for new file items.

### setFileItemFactory

    public abstract void setFileItemFactory(FileItemFactory factory)

  Sets the factory class to use when creating file items.

  Parameters:
    `factory` - The factory class for new file items.

### getSizeMax

    public long getSizeMax()

  Returns the maximum allowed size of a complete request, as opposed to `getFileSizeMax()`.

  Returns:
    The maximum allowed size, in bytes. The default value of -1 indicates, that there is no limit.
  See Also:
    `setSizeMax(long)`

### setSizeMax

    public void setSizeMax(long sizeMax)

  Sets the maximum allowed size of a complete request, as opposed to `setFileSizeMax(long)`.

  Parameters:
    `sizeMax` - The maximum allowed size, in bytes. The default value of -1 indicates, that there is no limit.
  See Also:
    `getSizeMax()`

### getFileSizeMax

    public long getFileSizeMax()

  Returns the maximum allowed size of a single uploaded file, as opposed to `getSizeMax()`.

  Returns:
    Maximum size of a single uploaded file.
  See Also:
    `setFileSizeMax(long)`

### setFileSizeMax

    public void setFileSizeMax(long fileSizeMax)

  Sets the maximum allowed size of a single uploaded file, as opposed to `getSizeMax()`.

  Parameters:
    `fileSizeMax` - Maximum size of a single uploaded file.
  See Also:
    `getFileSizeMax()`

### getHeaderEncoding

    public String getHeaderEncoding()

  Retrieves the character encoding used when reading the headers of an individual part. When not specified, or `null`, the request encoding is used. If that is also not specified, or `null`, the platform default encoding is used.

  Returns:
    The encoding used to read part headers.

### setHeaderEncoding

    public void setHeaderEncoding(String encoding)

  Specifies the character encoding to be used when reading the headers of individual part. When not specified, or `null`, the request encoding is used. If that is also not specified, or `null`, the platform default encoding is used.

  Parameters:
    `encoding` - The encoding used to read part headers.

### parseRequest

    public List parseRequest(javax.servlet.http.HttpServletRequest req)
                      throws FileUploadException

  Deprecated. Use the method in `ServletFileUpload` instead.

  Processes an RFC 1867 compliant `multipart/form-data` stream.

  Parameters:
    `req` - The servlet request to be parsed.
  Returns:
    A list of `FileItem` instances parsed from the request, in the order that they were transmitted.
  Throws:
    `FileUploadException` - if there are problems reading/parsing the request or storing files.

### getItemIterator

    public FileItemIterator getItemIterator(RequestContext ctx)
                                     throws FileUploadException,
                                            IOException

  Processes an RFC 1867 compliant `multipart/form-data` stream.

  Parameters:
    `ctx` - The context for the request to be parsed.
  Returns:
    An iterator to instances of `FileItemStream` parsed from the request, in the order that they were transmitted.
  Throws:
    `FileUploadException` - if there are problems reading/parsing the request or storing files.
    `FileUploadBase.FileUploadIOException` - An I/O error occurred. This may be a network error while communicating with the client or a problem while storing the uploaded content.
    `IOException`

### parseRequest

    public List parseRequest(RequestContext ctx)
                      throws FileUploadException

  Processes an RFC 1867 compliant `multipart/form-data` stream.

  Parameters:
    `ctx` - The context for the request to be parsed.
  Returns:
    A list of `FileItem` instances parsed from the request, in the order that they were transmitted.
  Throws:
    `FileUploadException` - if there are problems reading/parsing the request or storing files.

### getBoundary

    protected byte[] getBoundary(String contentType)

  Retrieves the boundary from the `Content-type` header.

  Parameters:
    `contentType` - The value of the content type header from which to extract the boundary value.
  Returns:
    The boundary, as a byte array.

### getFileName

    protected String getFileName(Map headers)

  Deprecated. Use `getFileName(FileItemHeaders)`.

  Retrieves the file name from the `Content-disposition` header.

  Parameters:
    `headers` - A `Map` containing the HTTP request headers.
  Returns:
    The file name for the current `encapsulation`.

### getFileName

    protected String getFileName(FileItemHeaders headers)

  Retrieves the file name from the `Content-disposition` header.

  Parameters:
    `headers` - The HTTP headers object.
  Returns:
    The file name for the current `encapsulation`.

### getFieldName

    protected String getFieldName(FileItemHeaders headers)

  Retrieves the field name from the `Content-disposition` header.

  Parameters:
    `headers` - A `Map` containing the HTTP request headers.
  Returns:
    The field name for the current `encapsulation`.

### getFieldName

    protected String getFieldName(Map headers)

  Deprecated. Use `getFieldName(FileItemHeaders)`.

  Retrieves the field name from the `Content-disposition` header.

  Parameters:
    `headers` - A `Map` containing the HTTP request headers.
  Returns:
    The field name for the current `encapsulation`.

### createItem

    protected FileItem createItem(Map headers,
                                  boolean isFormField)
                           throws FileUploadException

  Deprecated. This method is no longer used in favour of internally created instances of `FileItem`.

  Creates a new `FileItem` instance.

  Parameters:
    `headers` - A `Map` containing the HTTP request headers.
    `isFormField` - Whether or not this item is a form field, as opposed to a file.
  Returns:
    A newly created `FileItem` instance.
  Throws:
    `FileUploadException` - if an error occurs.

### getParsedHeaders

    protected FileItemHeaders getParsedHeaders(String headerPart)

  Parses the `header-part` and returns as key/value pairs.

  If there are multiple headers of the same names, the name will map to a comma-separated list containing the values.

  Parameters:
    `headerPart` - The `header-part` of the current `encapsulation`.
  Returns:
    A `Map` containing the parsed HTTP request headers.

### newFileItemHeaders

    protected FileItemHeadersImpl newFileItemHeaders()

  Creates a new instance of `FileItemHeaders`.

  Returns:
    The new instance.

### parseHeaders

    protected Map parseHeaders(String headerPart)

  Deprecated. Use `getParsedHeaders(String)`

  Parses the `header-part` and returns as key/value pairs.

  If there are multiple headers of the same names, the name will map to a comma-separated list containing the values.

  Parameters:
    `headerPart` - The `header-part` of the current `encapsulation`.
  Returns:
    A `Map` containing the parsed HTTP request headers.

### getHeader

    protected final String getHeader(Map headers,
                                     String name)

  Deprecated. Use `FileItemHeaders.getHeader(String)`.

  Returns the header with the specified name from the supplied map. The header lookup is case-insensitive.

  Parameters:
    `headers` - A `Map` containing the HTTP request headers.
    `name` - The name of the header to return.
  Returns:
    The value of specified header, or a comma-separated list if there were multiple headers of that name.

### getProgressListener

    public ProgressListener getProgressListener()

  Returns the progress listener.

  Returns:
    The progress listener, if any, or null.

### setProgressListener

    public void setProgressListener(ProgressListener pListener)

  Sets the progress listener.

  Parameters:
    `pListener` - The progress listener, if any. Defaults to null.

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