dom/html/HTMLFormSubmission.h
author Masayuki Nakano <masayuki@d-toybox.com>
Fri, 19 May 2017 17:49:41 +0900
changeset 407399 b75c111837a802ceb953dba50a3c5a193d53ca22
parent 345034 8105df56b23209b8cb3389dfe483214472e0bb3f
child 412434 e155fa765af299f0e8cfb42e0a1709e5b04928b9
permissions -rw-r--r--
Bug 1339543 part 4 Change nsIWidget::ExecuteNativeKeyBinding() to nsIWidget::GetEditCommands() which just retrieves edit commands for the type r=smaug Now, nsIWidget::ExecuteNativeKeyBinding() isn't used by anybody for executing edit commands. Instead, they need array of edit commands for the key combination. So, the method should be renamed to GetEditCommands() and just return edit commands as an array. MozReview-Commit-ID: 4G0B1lJ8Lbe

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef mozilla_dom_HTMLFormSubmission_h
#define mozilla_dom_HTMLFormSubmission_h

#include "mozilla/Attributes.h"
#include "nsCOMPtr.h"
#include "nsIContent.h"
#include "nsNCRFallbackEncoderWrapper.h"
#include "nsString.h"

class nsIURI;
class nsIInputStream;
class nsGenericHTMLElement;
class nsIMultiplexInputStream;

namespace mozilla {
namespace dom {

class Blob;
class Directory;

/**
 * Class for form submissions; encompasses the function to call to submit as
 * well as the form submission name/value pairs
 */
class HTMLFormSubmission
{
public:
  /**
   * Get a submission object based on attributes in the form (ENCTYPE and
   * METHOD)
   *
   * @param aForm the form to get a submission object based on
   * @param aOriginatingElement the originating element (can be null)
   * @param aFormSubmission the form submission object (out param)
   */
  static nsresult
  GetFromForm(nsGenericHTMLElement* aForm,
              nsGenericHTMLElement* aOriginatingElement,
              HTMLFormSubmission** aFormSubmission);

  virtual ~HTMLFormSubmission()
  {
    MOZ_COUNT_DTOR(HTMLFormSubmission);
  }

  /**
   * Submit a name/value pair
   *
   * @param aName the name of the parameter
   * @param aValue the value of the parameter
   */
  virtual nsresult
  AddNameValuePair(const nsAString& aName, const nsAString& aValue) = 0;

  /**
   * Submit a name/blob pair
   *
   * @param aName the name of the parameter
   * @param aBlob the blob to submit. The file's name will be used if the Blob
   * is actually a File, otherwise 'blob' string is used instead if the aBlob is
   * not null.
   */
  virtual nsresult
  AddNameBlobOrNullPair(const nsAString& aName, Blob* aBlob) = 0;

  /**
   * Submit a name/directory pair
   *
   * @param aName the name of the parameter
   * @param aBlob the directory to submit.
   */
  virtual nsresult AddNameDirectoryPair(const nsAString& aName,
                                        Directory* aDirectory) = 0;

  /**
   * Reports whether the instance supports AddIsindex().
   *
   * @return true if supported.
   */
  virtual bool SupportsIsindexSubmission()
  {
    return false;
  }

  /**
   * Adds an isindex value to the submission.
   *
   * @param aValue the field value
   */
  virtual nsresult AddIsindex(const nsAString& aValue)
  {
    NS_NOTREACHED("AddIsindex called when not supported");
    return NS_ERROR_UNEXPECTED;
  }

  /**
   * Given a URI and the current submission, create the final URI and data
   * stream that will be submitted.  Subclasses *must* implement this.
   *
   * @param aURI the URI being submitted to [INOUT]
   * @param aPostDataStream a data stream for POST data [OUT]
   */
  virtual nsresult
  GetEncodedSubmission(nsIURI* aURI, nsIInputStream** aPostDataStream) = 0;

  /**
   * Get the charset that will be used for submission.
   */
  void GetCharset(nsACString& aCharset)
  {
    aCharset = mCharset;
  }

  nsIContent* GetOriginatingElement() const
  {
    return mOriginatingElement.get();
  }

protected:
  /**
   * Can only be constructed by subclasses.
   *
   * @param aCharset the charset of the form as a string
   * @param aOriginatingElement the originating element (can be null)
   */
  HTMLFormSubmission(const nsACString& aCharset,
                     nsIContent* aOriginatingElement)
    : mCharset(aCharset)
    , mOriginatingElement(aOriginatingElement)
  {
    MOZ_COUNT_CTOR(HTMLFormSubmission);
  }

  // The name of the encoder charset
  nsCString mCharset;

  // Originating element.
  nsCOMPtr<nsIContent> mOriginatingElement;
};

class EncodingFormSubmission : public HTMLFormSubmission
{
public:
  EncodingFormSubmission(const nsACString& aCharset,
                         nsIContent* aOriginatingElement);

  virtual ~EncodingFormSubmission();

  /**
   * Encode a Unicode string to bytes using the encoder (or just copy the input
   * if there is no encoder).
   * @param aStr the string to encode
   * @param aResult the encoded string [OUT]
   * @param aHeaderEncode If true, turns all linebreaks into spaces and escapes
   *                      all quotes
   * @throws an error if UnicodeToNewBytes fails
   */
  nsresult EncodeVal(const nsAString& aStr, nsCString& aResult,
                     bool aHeaderEncode);

private:
  // The encoder that will encode Unicode names and values
  nsNCRFallbackEncoderWrapper mEncoder;
};

/**
 * Handle multipart/form-data encoding, which does files as well as normal
 * inputs.  This always does POST.
 */
class FSMultipartFormData : public EncodingFormSubmission
{
public:
  /**
   * @param aCharset the charset of the form as a string
   */
  FSMultipartFormData(const nsACString& aCharset,
                      nsIContent* aOriginatingElement);
  ~FSMultipartFormData();
 
  virtual nsresult
  AddNameValuePair(const nsAString& aName, const nsAString& aValue) override;

  virtual nsresult
  AddNameBlobOrNullPair(const nsAString& aName, Blob* aBlob) override;

  virtual nsresult
  AddNameDirectoryPair(const nsAString& aName, Directory* aDirectory) override;

  virtual nsresult
  GetEncodedSubmission(nsIURI* aURI, nsIInputStream** aPostDataStream) override;

  void GetContentType(nsACString& aContentType)
  {
    aContentType =
      NS_LITERAL_CSTRING("multipart/form-data; boundary=") + mBoundary;
  }

  nsIInputStream* GetSubmissionBody(uint64_t* aContentLength);

protected:

  /**
   * Roll up the data we have so far and add it to the multiplexed data stream.
   */
  nsresult AddPostDataStream();

private:
  void AddDataChunk(const nsACString& aName,
                    const nsACString& aFilename,
                    const nsACString& aContentType,
                    nsIInputStream* aInputStream,
                    uint64_t aInputStreamSize);
  /**
   * The post data stream as it is so far.  This is a collection of smaller
   * chunks--string streams and file streams interleaved to make one big POST
   * stream.
   */
  nsCOMPtr<nsIMultiplexInputStream> mPostDataStream;

  /**
   * The current string chunk.  When a file is hit, the string chunk gets
   * wrapped up into an input stream and put into mPostDataStream so that the
   * file input stream can then be appended and everything is in the right
   * order.  Then the string chunk gets appended to again as we process more
   * name/value pairs.
   */
  nsCString mPostDataChunk;

  /**
   * The boundary string to use after each "part" (the boundary that marks the
   * end of a value).  This is computed randomly and is different for each
   * submission.
   */
  nsCString mBoundary;

  /**
   * The total length in bytes of the streams that make up mPostDataStream
   */
  uint64_t mTotalLength;
};

} // namespace dom
} // namespace mozilla

#endif /* mozilla_dom_HTMLFormSubmission_h */