Package org.apache.commons.fileupload2.core

Class AbstractFileUpload<R,I extends FileItem<I>,F extends FileItemFactory<I>>

java.lang.Object
org.apache.commons.fileupload2.core.AbstractFileUpload<R,I,F>
Type Parameters:
R - The request context type.
I - The FileItem type.
F - the FileItemFactory type.
Direct Known Subclasses:
JakartaServletFileUpload, JakartaServletFileUpload, JavaxPortletFileUpload, JavaxServletFileUpload
public abstract class AbstractFileUpload<R,I extends FileItem<I>,F extends FileItemFactory<I>> 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(RequestContext) to acquire a list of FileItems 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.

  • Field Details

  • Constructor Details

  • Method Details

    • 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.

    • getBoundary

      public byte[] getBoundary(String contentType)
      Gets 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.

    • getFieldName

      public String getFieldName(FileItemHeaders headers)
      Gets 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.

    • getFileCountMax

      public long getFileCountMax()
      Gets the maximum number of files allowed in a single request.
      Returns:
      The maximum number of files allowed in a single request.

    • getFileItemFactory

      public F getFileItemFactory()
      Gets the factory class used when creating file items.
      Returns:
      The factory class for new file items.

    • getFileName

      public String getFileName(FileItemHeaders headers)
      Gets the file name from the Content-disposition header.
      Parameters:
      headers - The HTTP headers object.
      Returns:
      The file name for the current encapsulation.

    • getFileSizeMax

      public long getFileSizeMax()
      Gets the maximum allowed size of a single uploaded file, as opposed to getSizeMax().
      Returns:
      Maximum size of a single uploaded file.
      See Also:

    • getHeaderCharset

      public Charset getHeaderCharset()
      Gets 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.

    • getItemIterator

      public abstract FileItemInputIterator getItemIterator(R request) throws FileUploadException, IOException
      Gets a file item iterator.
      Parameters:
      request - The servlet request to be parsed.
      Returns:
      An iterator to instances of FileItemInput parsed from the request, in the order that they were transmitted.
      Throws:
      FileUploadException - if there are problems reading/parsing the request or storing files.
      IOException - An I/O error occurred. This may be a network error while communicating with the client or a problem while storing the uploaded content.

    • getItemIterator

      public FileItemInputIterator getItemIterator(RequestContext requestContext) throws FileUploadException, IOException
      Gets an RFC 1867 compliant multipart/form-data stream.
      Parameters:
      requestContext - The context for the request to be parsed.
      Returns:
      An iterator to instances of FileItemInput parsed from the request, in the order that they were transmitted.
      Throws:
      FileUploadException - if there are problems reading/parsing the request or storing files.
      IOException - An I/O error occurred. This may be a network error while communicating with the client or a problem while storing the uploaded content.

    • getParsedHeaders

      public 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.

    • getProgressListener

      public ProgressListener getProgressListener()
      Gets the progress listener.
      Returns:
      The progress listener, if any, or null.

    • getSizeMax

      public long getSizeMax()
      Gets 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:

    • newFileItemHeaders

      protected FileItemHeaders newFileItemHeaders()
      Creates a new instance of FileItemHeaders.
      Returns:
      The new instance.

    • parseParameterMap

      public abstract Map<String,List<I>> parseParameterMap(R request) throws FileUploadException
      Parses an RFC 1867 compliant multipart/form-data stream.
      Parameters:
      request - The servlet request to be parsed.
      Returns:
      A map of FileItem instances parsed from the request.
      Throws:
      FileUploadException - if there are problems reading/parsing the request or storing files.

    • parseParameterMap

      public Map<String,List<I>> parseParameterMap(RequestContext ctx) throws FileUploadException
      Parses an RFC 1867 compliant multipart/form-data stream.
      Parameters:
      ctx - The context for the request to be parsed.
      Returns:
      A map of FileItem instances parsed from the request.
      Throws:
      FileUploadException - if there are problems reading/parsing the request or storing files.

    • parseRequest

      public abstract List<I> parseRequest(R request) throws FileUploadException
      Parses an RFC 1867 compliant multipart/form-data stream.
      Parameters:
      request - 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.

    • parseRequest

      public List<I> parseRequest(RequestContext requestContext) throws FileUploadException
      Parses an RFC 1867 compliant multipart/form-data stream.
      Parameters:
      requestContext - 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.

    • setFileCountMax

      public void setFileCountMax(long fileCountMax)
      Sets the maximum number of files allowed per request.
      Parameters:
      fileCountMax - The new limit. -1 means no limit.

    • setFileItemFactory

      public void setFileItemFactory(F factory)
      Sets the factory class to use when creating file items.
      Parameters:
      factory - The factory class for new file items.

    • 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:

    • setHeaderCharset

      public void setHeaderCharset(Charset headerCharset)
      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:
      headerCharset - The encoding used to read part headers.

    • setProgressListener

      public void setProgressListener(ProgressListener progressListener)
      Sets the progress listener.
      Parameters:
      progressListener - The progress listener, if any. Defaults to null.

    • 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: