DXR will be turned off on Tuesday, December 29th. It will redirect to Searchfox.
See the announcement on Discourse.

DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

Implementation

Mercurial (c68fe15a81fc)

VCS Links

Line Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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
#ifndef mozilla_dom_HTMLFormSubmission_h
#define mozilla_dom_HTMLFormSubmission_h

#include "mozilla/Attributes.h"
#include "mozilla/dom/Element.h"
#include "mozilla/dom/UserActivation.h"
#include "mozilla/dom/UserActivation.h"
#include "mozilla/dom/HTMLDialogElement.h"
#include "nsCOMPtr.h"
#include "mozilla/Encoding.h"
#include "nsString.h"


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

namespace mozilla {
namespace mozilla {
namespace dom {

class Blob;
class Directory;
class HTMLFormElement;
class HTMLFormElement;

/**
 * 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)
   * METHOD)
   *
   * @param aForm the form to get a submission object based on
   * @param aSubmitter the submitter element (can be null)
   * @param aFormSubmission the form submission object (out param)
   */
   */
  static nsresult GetFromForm(HTMLFormElement* aForm,
                              nsGenericHTMLElement* aSubmitter,
                              NotNull<const Encoding*>& aEncoding,
                              HTMLFormSubmission** aFormSubmission);
                              HTMLFormSubmission** aFormSubmission);

  MOZ_COUNTED_DTOR_VIRTUAL(HTMLFormSubmission)

  /**
   * Submit a name/value pair
   * 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,
  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.
   * not null.
   */
  virtual nsresult AddNameBlobOrNullPair(const nsAString& aName,
                                         Blob* aBlob) = 0;

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


  /**
   * 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 [IN]
   * @param aURI the URI being submitted to [IN]
   * @param aPostDataStream a data stream for POST data [OUT]
   * @param aOutURI the resulting URI. May be the same as aURI [OUT]
   */
  virtual nsresult GetEncodedSubmission(nsIURI* aURI,
                                        nsIInputStream** aPostDataStream,
                                        nsIInputStream** aPostDataStream,
                                        nsCOMPtr<nsIURI>& aOutURI) = 0;

  /**
   * Get the charset that will be used for submission.
   */
   */
  void GetCharset(nsACString& aCharset) { mEncoding->Name(aCharset); }

  Element* GetSubmitterElement() const { return mSubmitter.get(); }


  /**
   * Get the action URI that will be used for submission.
   */
  nsIURI* GetActionURL() const { return mActionURL; }

  /**
   * Get the target that will be used for submission.
   * Get the target that will be used for submission.
   */
  void GetTarget(nsAString& aTarget) { aTarget = mTarget; }

  /**
   * Return true if this form submission was user-initiated.
   * Return true if this form submission was user-initiated.
   */
  bool IsInitiatedFromUserInput() const { return mInitiatedFromUserInput; }

  virtual DialogFormSubmission* GetAsDialogSubmission() { return nullptr; }


 protected:
  /**
   * Can only be constructed by subclasses.
   *
   * @param aEncoding the character encoding of the form
   * @param aEncoding the character encoding of the form
   * @param aSubmitter the submitter element (can be null)
   */
  HTMLFormSubmission(nsIURI* aActionURL, const nsAString& aTarget,
  HTMLFormSubmission(nsIURI* aActionURL, const nsAString& aTarget,
                     mozilla::NotNull<const mozilla::Encoding*> aEncoding,
                     Element* aSubmitter)
      : mActionURL(aActionURL),
        mTarget(aTarget),
        mEncoding(aEncoding),
        mEncoding(aEncoding),
        mSubmitter(aSubmitter),
        mInitiatedFromUserInput(UserActivation::IsHandlingUserInput()) {
    MOZ_COUNT_CTOR(HTMLFormSubmission);
  }


  // The action url.
  nsCOMPtr<nsIURI> mActionURL;

  // The target.
  // The target.
  nsString mTarget;

  // The character encoding of this form submission
  mozilla::NotNull<const mozilla::Encoding*> mEncoding;


  // Submitter element.
  RefPtr<Element> mSubmitter;

  // Keep track of whether this form submission was user-initiated or not
  bool mInitiatedFromUserInput;
  bool mInitiatedFromUserInput;
};

class EncodingFormSubmission : public HTMLFormSubmission {
 public:
  EncodingFormSubmission(nsIURI* aActionURL, const nsAString& aTarget,
  EncodingFormSubmission(nsIURI* aActionURL, const nsAString& aTarget,
                         mozilla::NotNull<const mozilla::Encoding*> aEncoding,
                         Element* aSubmitter);

  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 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);
};

class DialogFormSubmission final : public HTMLFormSubmission {
class DialogFormSubmission final : public HTMLFormSubmission {
 public:
  DialogFormSubmission(nsAString& aResult, nsIURI* aActionURL,
                       const nsAString& aTarget,
                       NotNull<const Encoding*> aEncoding, Element* aSubmitter,
                       HTMLDialogElement* aDialogElement)
      : HTMLFormSubmission(aActionURL, aTarget, aEncoding, aSubmitter),
      : HTMLFormSubmission(aActionURL, aTarget, aEncoding, aSubmitter),
        mDialogElement(aDialogElement),
        mReturnValue(aResult) {}
  nsresult AddNameValuePair(const nsAString& aName,
                            const nsAString& aValue) override {
    MOZ_CRASH("This method should not be called");
    MOZ_CRASH("This method should not be called");
    return NS_OK;
  }

  nsresult AddNameBlobOrNullPair(const nsAString& aName, Blob* aBlob) override {
    MOZ_CRASH("This method should not be called");
    MOZ_CRASH("This method should not be called");
    return NS_OK;
  }

  nsresult AddNameDirectoryPair(const nsAString& aName,
                                Directory* aDirectory) override {
                                Directory* aDirectory) override {
    MOZ_CRASH("This method should not be called");
    return NS_OK;
  }

  nsresult GetEncodedSubmission(nsIURI* aURI, nsIInputStream** aPostDataStream,
  nsresult GetEncodedSubmission(nsIURI* aURI, nsIInputStream** aPostDataStream,
                                nsCOMPtr<nsIURI>& aOutURI) override {
    MOZ_CRASH("This method should not be called");
    return NS_OK;
  }

  DialogFormSubmission* GetAsDialogSubmission() override { return this; }


  HTMLDialogElement* DialogElement() { return mDialogElement; }

  nsString& ReturnValue() { return mReturnValue; }

 private:
 private:
  const RefPtr<HTMLDialogElement> mDialogElement;
  nsString mReturnValue;
};


/**
 * Handle multipart/form-data encoding, which does files as well as normal
 * inputs.  This always does POST.
 */
class FSMultipartFormData : public EncodingFormSubmission {
class FSMultipartFormData : public EncodingFormSubmission {
 public:
  /**
   * @param aEncoding the character encoding of the form
   */
  FSMultipartFormData(nsIURI* aActionURL, const nsAString& aTarget,
  FSMultipartFormData(nsIURI* aActionURL, const nsAString& aTarget,
                      mozilla::NotNull<const mozilla::Encoding*> aEncoding,
                      Element* aSubmitter);
  ~FSMultipartFormData();


  virtual nsresult AddNameValuePair(const nsAString& aName,
                                    const nsAString& aValue) override;

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

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

  virtual nsresult GetEncodedSubmission(nsIURI* aURI,
  virtual nsresult GetEncodedSubmission(nsIURI* aURI,
                                        nsIInputStream** aPostDataStream,
                                        nsCOMPtr<nsIURI>& aOutURI) override;

  void GetContentType(nsACString& aContentType) {
    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> mPostData;
  nsCOMPtr<nsIMultiplexInputStream> mPostData;

  /**
   * The same stream, but as an nsIInputStream.
   * Raw pointers because it is just QI of mInputStream.
   */
   */
  nsIInputStream* mPostDataStream;

  /**
   * The current string chunk.  When a file is hit, the string chunk gets
   * 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;
  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.
   * submission.
   */
  nsCString mBoundary;

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

}  // namespace dom
}  // namespace dom
}  // namespace mozilla

#endif /* mozilla_dom_HTMLFormSubmission_h */