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.

Header

Mercurial (31ec81b5d7bb)

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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* vim:set ts=4 sw=4 sts=4 et: */
/* 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/. */

#include "nsViewSourceChannel.h"
#include "nsIIOService.h"
#include "nsIServiceManager.h"
#include "nsIInterfaceRequestor.h"
#include "nsIInterfaceRequestorUtils.h"
#include "nsXPIDLString.h"
#include "nsReadableUtils.h"
#include "nsMimeTypes.h"
#include "nsNetUtil.h"
#include "nsIHttpHeaderVisitor.h"
#include "nsStringStream.h"

NS_IMPL_ADDREF(nsViewSourceChannel)
NS_IMPL_RELEASE(nsViewSourceChannel)
/*
  This QI uses NS_INTERFACE_MAP_ENTRY_CONDITIONAL to check for
  non-nullness of mHttpChannel, mCachingChannel, and mUploadChannel.
*/
NS_INTERFACE_MAP_BEGIN(nsViewSourceChannel)
    NS_INTERFACE_MAP_ENTRY(nsIViewSourceChannel)
    NS_INTERFACE_MAP_ENTRY(nsIStreamListener)
    NS_INTERFACE_MAP_ENTRY(nsIRequestObserver)
    NS_INTERFACE_MAP_ENTRY_CONDITIONAL(nsIHttpChannel, mHttpChannel)
    NS_INTERFACE_MAP_ENTRY_CONDITIONAL(nsIHttpChannelInternal, mHttpChannelInternal)
    NS_INTERFACE_MAP_ENTRY_CONDITIONAL(nsICachingChannel, mCachingChannel)
    NS_INTERFACE_MAP_ENTRY_CONDITIONAL(nsIApplicationCacheChannel, mApplicationCacheChannel)
    NS_INTERFACE_MAP_ENTRY_CONDITIONAL(nsIUploadChannel, mUploadChannel)
    NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsIRequest, nsIViewSourceChannel)
    NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsIChannel, nsIViewSourceChannel)
    NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIViewSourceChannel)
NS_INTERFACE_MAP_END

nsresult
nsViewSourceChannel::Init(nsIURI* uri)
{
    mOriginalURI = uri;

    nsAutoCString path;
    nsresult rv = uri->GetPath(path);
    if (NS_FAILED(rv))
      return rv;

    nsCOMPtr<nsIIOService> pService(do_GetIOService(&rv));
    if (NS_FAILED(rv)) return rv;

    nsAutoCString scheme;
    rv = pService->ExtractScheme(path, scheme);
    if (NS_FAILED(rv))
      return rv;

    // prevent viewing source of javascript URIs (see bug 204779)
    if (scheme.LowerCaseEqualsLiteral("javascript")) {
      NS_WARNING("blocking view-source:javascript:");
      return NS_ERROR_INVALID_ARG;
    }

    rv = pService->NewChannel(path, nullptr, nullptr, getter_AddRefs(mChannel));
    if (NS_FAILED(rv))
      return rv;

    mIsSrcdocChannel = false;

    mChannel->SetOriginalURI(mOriginalURI);
    mHttpChannel = do_QueryInterface(mChannel);
    mHttpChannelInternal = do_QueryInterface(mChannel);
    mCachingChannel = do_QueryInterface(mChannel);
    mApplicationCacheChannel = do_QueryInterface(mChannel);
    mUploadChannel = do_QueryInterface(mChannel);
    
    return NS_OK;
}

nsresult
nsViewSourceChannel::InitSrcdoc(nsIURI* aURI, const nsAString &aSrcdoc)
{

    nsresult rv;

    nsCOMPtr<nsIURI> inStreamURI;
    // Need to strip view-source: from the URI.  Hardcoded to
    // about:srcdoc as this is the only permissible URI for srcdoc 
    // loads
    rv = NS_NewURI(getter_AddRefs(inStreamURI),
                   NS_LITERAL_STRING("about:srcdoc"));
    NS_ENSURE_SUCCESS(rv, rv);

    rv = NS_NewInputStreamChannel(getter_AddRefs(mChannel), inStreamURI,
                                  aSrcdoc, NS_LITERAL_CSTRING("text/html"),
                                  true);

    NS_ENSURE_SUCCESS(rv, rv);
    mOriginalURI = aURI;
    mIsSrcdocChannel = true;
    
    mChannel->SetOriginalURI(mOriginalURI);
    mHttpChannel = do_QueryInterface(mChannel);
    mHttpChannelInternal = do_QueryInterface(mChannel);
    mCachingChannel = do_QueryInterface(mChannel);
    mApplicationCacheChannel = do_QueryInterface(mChannel);
    mUploadChannel = do_QueryInterface(mChannel);
    return NS_OK;
}

////////////////////////////////////////////////////////////////////////////////
// nsIRequest methods:

NS_IMETHODIMP
nsViewSourceChannel::GetName(nsACString &result)
{
    return NS_ERROR_NOT_IMPLEMENTED;
}

NS_IMETHODIMP
nsViewSourceChannel::IsPending(bool *result)
{
    NS_ENSURE_TRUE(mChannel, NS_ERROR_FAILURE);

    return mChannel->IsPending(result);
}

NS_IMETHODIMP
nsViewSourceChannel::GetStatus(nsresult *status)
{
    NS_ENSURE_TRUE(mChannel, NS_ERROR_FAILURE);

    return mChannel->GetStatus(status);
}

NS_IMETHODIMP
nsViewSourceChannel::Cancel(nsresult status)
{
    NS_ENSURE_TRUE(mChannel, NS_ERROR_FAILURE);

    return mChannel->Cancel(status);
}

NS_IMETHODIMP
nsViewSourceChannel::Suspend(void)
{
    NS_ENSURE_TRUE(mChannel, NS_ERROR_FAILURE);

    return mChannel->Suspend();
}

NS_IMETHODIMP
nsViewSourceChannel::Resume(void)
{
    NS_ENSURE_TRUE(mChannel, NS_ERROR_FAILURE);

    return mChannel->Resume();
}

////////////////////////////////////////////////////////////////////////////////
// nsIChannel methods:

NS_IMETHODIMP
nsViewSourceChannel::GetOriginalURI(nsIURI* *aURI)
{
    NS_ASSERTION(aURI, "Null out param!");
    *aURI = mOriginalURI;
    NS_ADDREF(*aURI);
    return NS_OK;
}

NS_IMETHODIMP
nsViewSourceChannel::SetOriginalURI(nsIURI* aURI)
{
    NS_ENSURE_ARG_POINTER(aURI);
    mOriginalURI = aURI;
    return NS_OK;
}

NS_IMETHODIMP
nsViewSourceChannel::GetURI(nsIURI* *aURI)
{
    NS_ENSURE_TRUE(mChannel, NS_ERROR_FAILURE);

    nsCOMPtr<nsIURI> uri;
    nsresult rv = mChannel->GetURI(getter_AddRefs(uri));
    if (NS_FAILED(rv))
      return rv;

    // protect ourselves against broken channel implementations
    if (!uri) {
      NS_ERROR("inner channel returned NS_OK and a null URI");
      return NS_ERROR_UNEXPECTED;
    }

    nsAutoCString spec;
    uri->GetSpec(spec);

    /* XXX Gross hack -- NS_NewURI goes into an infinite loop on
       non-flat specs.  See bug 136980 */
    return NS_NewURI(aURI, nsAutoCString(NS_LITERAL_CSTRING("view-source:")+spec), nullptr);
}

NS_IMETHODIMP
nsViewSourceChannel::Open(nsIInputStream **_retval)
{
    NS_ENSURE_TRUE(mChannel, NS_ERROR_FAILURE);

    nsresult rv = mChannel->Open(_retval);
    if (NS_SUCCEEDED(rv)) {
        mOpened = true;
    }
    
    return rv;
}

NS_IMETHODIMP
nsViewSourceChannel::AsyncOpen(nsIStreamListener *aListener, nsISupports *ctxt)
{
    NS_ENSURE_TRUE(mChannel, NS_ERROR_FAILURE);

    mListener = aListener;

    /*
     * We want to add ourselves to the loadgroup before opening
     * mChannel, since we want to make sure we're in the loadgroup
     * when mChannel finishes and fires OnStopRequest()
     */
    
    nsCOMPtr<nsILoadGroup> loadGroup;
    mChannel->GetLoadGroup(getter_AddRefs(loadGroup));
    if (loadGroup)
        loadGroup->AddRequest(static_cast<nsIViewSourceChannel*>
                                         (this), nullptr);
    
    nsresult rv = mChannel->AsyncOpen(this, ctxt);

    if (NS_FAILED(rv) && loadGroup)
        loadGroup->RemoveRequest(static_cast<nsIViewSourceChannel*>
                                            (this),
                                 nullptr, rv);

    if (NS_SUCCEEDED(rv)) {
        mOpened = true;
    }
    
    return rv;
}

/*
 * Both the view source channel and mChannel are added to the
 * loadgroup.  There should never be more than one request in the
 * loadgroup that has LOAD_DOCUMENT_URI set.  The one that has this
 * flag set is the request whose URI is used to refetch the document,
 * so it better be the viewsource channel.
 *
 * Therefore, we need to make sure that
 * 1) The load flags on mChannel _never_ include LOAD_DOCUMENT_URI
 * 2) The load flags on |this| include LOAD_DOCUMENT_URI when it was
 *    set via SetLoadFlags (mIsDocument keeps track of this flag).
 */

NS_IMETHODIMP
nsViewSourceChannel::GetLoadFlags(uint32_t *aLoadFlags)
{
    NS_ENSURE_TRUE(mChannel, NS_ERROR_FAILURE);

    nsresult rv = mChannel->GetLoadFlags(aLoadFlags);
    if (NS_FAILED(rv))
      return rv;

    // This should actually be just LOAD_DOCUMENT_URI but the win32 compiler
    // fails to deal due to amiguous inheritance.  nsIChannel::LOAD_DOCUMENT_URI
    // also fails; the Win32 compiler thinks that's supposed to be a method.
    if (mIsDocument)
      *aLoadFlags |= ::nsIChannel::LOAD_DOCUMENT_URI;

    return rv;
}

NS_IMETHODIMP
nsViewSourceChannel::SetLoadFlags(uint32_t aLoadFlags)
{
    NS_ENSURE_TRUE(mChannel, NS_ERROR_FAILURE);

    // "View source" always wants the currently cached content.
    // We also want to have _this_ channel, not mChannel to be the
    // 'document' channel in the loadgroup. 
 
    // These should actually be just LOAD_FROM_CACHE and LOAD_DOCUMENT_URI but
    // the win32 compiler fails to deal due to amiguous inheritance.
    // nsIChannel::LOAD_DOCUMENT_URI/nsIRequest::LOAD_FROM_CACHE also fails; the
    // Win32 compiler thinks that's supposed to be a method.
    mIsDocument = (aLoadFlags & ::nsIChannel::LOAD_DOCUMENT_URI) ? true : false;

    return mChannel->SetLoadFlags((aLoadFlags |
                                   ::nsIRequest::LOAD_FROM_CACHE) &
                                  ~::nsIChannel::LOAD_DOCUMENT_URI);
}

NS_IMETHODIMP
nsViewSourceChannel::GetContentType(nsACString &aContentType) 
{
    NS_ENSURE_TRUE(mChannel, NS_ERROR_FAILURE);

    aContentType.Truncate();

    if (mContentType.IsEmpty())
    {
        // Get the current content type
        nsresult rv;
        nsAutoCString contentType;
        rv = mChannel->GetContentType(contentType);
        if (NS_FAILED(rv)) return rv;

        // If we don't know our type, just say so.  The unknown
        // content decoder will then kick in automatically, and it
        // will call our SetOriginalContentType method instead of our
        // SetContentType method to set the type it determines.
        if (!contentType.Equals(UNKNOWN_CONTENT_TYPE)) {
          contentType = VIEWSOURCE_CONTENT_TYPE;
        }

        mContentType = contentType;
    }

    aContentType = mContentType;
    return NS_OK;
}

NS_IMETHODIMP
nsViewSourceChannel::SetContentType(const nsACString &aContentType)
{
    // Our GetContentType() currently returns VIEWSOURCE_CONTENT_TYPE
    //
    // However, during the parsing phase the parser calls our
    // channel's GetContentType(). Returning the string above trips up
    // the parser. In order to avoid messy changes and not to have the
    // parser depend on nsIViewSourceChannel Vidur proposed the
    // following solution:
    //
    // The ViewSourceChannel initially returns a content type of
    // VIEWSOURCE_CONTENT_TYPE.  Based on this type decisions to
    // create a viewer for doing a view source are made.  After the
    // viewer is created, nsLayoutDLF::CreateInstance() calls this
    // SetContentType() with the original content type.  When it's
    // time for the parser to find out the content type it will call
    // our channel's GetContentType() and it will get the original
    // content type, such as, text/html and everything is kosher from
    // then on.

    if (!mOpened) {
        // We do not take hints
        return NS_ERROR_NOT_AVAILABLE;
    }
    
    mContentType = aContentType;
    return NS_OK;
}

NS_IMETHODIMP
nsViewSourceChannel::GetContentCharset(nsACString &aContentCharset)
{
    NS_ENSURE_TRUE(mChannel, NS_ERROR_FAILURE);

    return mChannel->GetContentCharset(aContentCharset);
}

NS_IMETHODIMP
nsViewSourceChannel::SetContentCharset(const nsACString &aContentCharset)
{
    NS_ENSURE_TRUE(mChannel, NS_ERROR_FAILURE);

    return mChannel->SetContentCharset(aContentCharset);
}

// We don't forward these methods becacuse content-disposition isn't whitelisted
// (see GetResponseHeader/VisitResponseHeaders).
NS_IMETHODIMP
nsViewSourceChannel::GetContentDisposition(uint32_t *aContentDisposition)
{
    return NS_ERROR_NOT_AVAILABLE;
}

NS_IMETHODIMP
nsViewSourceChannel::SetContentDisposition(uint32_t aContentDisposition)
{
    return NS_ERROR_NOT_AVAILABLE;
}

NS_IMETHODIMP
nsViewSourceChannel::GetContentDispositionFilename(nsAString &aContentDispositionFilename)
{
    return NS_ERROR_NOT_AVAILABLE;
}

NS_IMETHODIMP
nsViewSourceChannel::SetContentDispositionFilename(const nsAString &aContentDispositionFilename)
{
    return NS_ERROR_NOT_AVAILABLE;
}

NS_IMETHODIMP
nsViewSourceChannel::GetContentDispositionHeader(nsACString &aContentDispositionHeader)
{
    return NS_ERROR_NOT_AVAILABLE;
}

NS_IMETHODIMP
nsViewSourceChannel::GetContentLength(int64_t *aContentLength)
{
    NS_ENSURE_TRUE(mChannel, NS_ERROR_FAILURE);

    return mChannel->GetContentLength(aContentLength);
}

NS_IMETHODIMP
nsViewSourceChannel::SetContentLength(int64_t aContentLength)
{
    NS_ENSURE_TRUE(mChannel, NS_ERROR_FAILURE);

    return mChannel->SetContentLength(aContentLength);
}

NS_IMETHODIMP
nsViewSourceChannel::GetLoadGroup(nsILoadGroup* *aLoadGroup)
{
    NS_ENSURE_TRUE(mChannel, NS_ERROR_FAILURE);

    return mChannel->GetLoadGroup(aLoadGroup);
}

NS_IMETHODIMP
nsViewSourceChannel::SetLoadGroup(nsILoadGroup* aLoadGroup)
{
    NS_ENSURE_TRUE(mChannel, NS_ERROR_FAILURE);

    return mChannel->SetLoadGroup(aLoadGroup);
}

NS_IMETHODIMP
nsViewSourceChannel::GetOwner(nsISupports* *aOwner)
{
    NS_ENSURE_TRUE(mChannel, NS_ERROR_FAILURE);

    return mChannel->GetOwner(aOwner);
}

NS_IMETHODIMP
nsViewSourceChannel::SetOwner(nsISupports* aOwner)
{
    NS_ENSURE_TRUE(mChannel, NS_ERROR_FAILURE);

    return mChannel->SetOwner(aOwner);
}

NS_IMETHODIMP
nsViewSourceChannel::GetNotificationCallbacks(nsIInterfaceRequestor* *aNotificationCallbacks)
{
    NS_ENSURE_TRUE(mChannel, NS_ERROR_FAILURE);

    return mChannel->GetNotificationCallbacks(aNotificationCallbacks);
}

NS_IMETHODIMP
nsViewSourceChannel::SetNotificationCallbacks(nsIInterfaceRequestor* aNotificationCallbacks)
{
    NS_ENSURE_TRUE(mChannel, NS_ERROR_FAILURE);

    return mChannel->SetNotificationCallbacks(aNotificationCallbacks);
}

NS_IMETHODIMP 
nsViewSourceChannel::GetSecurityInfo(nsISupports * *aSecurityInfo)
{
    NS_ENSURE_TRUE(mChannel, NS_ERROR_FAILURE);

    return mChannel->GetSecurityInfo(aSecurityInfo);
}

// nsIViewSourceChannel methods
NS_IMETHODIMP
nsViewSourceChannel::GetOriginalContentType(nsACString &aContentType) 
{
    NS_ENSURE_TRUE(mChannel, NS_ERROR_FAILURE);

    return mChannel->GetContentType(aContentType);
}

NS_IMETHODIMP
nsViewSourceChannel::SetOriginalContentType(const nsACString &aContentType)
{
    NS_ENSURE_TRUE(mChannel, NS_ERROR_FAILURE);

    // clear our cached content-type value
    mContentType.Truncate();

    return mChannel->SetContentType(aContentType);
}

NS_IMETHODIMP
nsViewSourceChannel::GetIsSrcdocChannel(bool* aIsSrcdocChannel)
{
    *aIsSrcdocChannel = mIsSrcdocChannel;
    return NS_OK;
}

// nsIRequestObserver methods
NS_IMETHODIMP
nsViewSourceChannel::OnStartRequest(nsIRequest *aRequest, nsISupports *aContext)
{
    NS_ENSURE_TRUE(mListener, NS_ERROR_FAILURE);
    // The channel may have gotten redirected... Time to update our info
    mChannel = do_QueryInterface(aRequest);
    mHttpChannel = do_QueryInterface(aRequest);
    mCachingChannel = do_QueryInterface(aRequest);
    mUploadChannel = do_QueryInterface(aRequest);
    
    return mListener->OnStartRequest(static_cast<nsIViewSourceChannel*>
                                                (this),
                                     aContext);
}


NS_IMETHODIMP
nsViewSourceChannel::OnStopRequest(nsIRequest *aRequest, nsISupports* aContext,
                               nsresult aStatus)
{
    NS_ENSURE_TRUE(mListener, NS_ERROR_FAILURE);
    if (mChannel)
    {
        nsCOMPtr<nsILoadGroup> loadGroup;
        mChannel->GetLoadGroup(getter_AddRefs(loadGroup));
        if (loadGroup)
        {
            loadGroup->RemoveRequest(static_cast<nsIViewSourceChannel*>
                                                (this),
                                     nullptr, aStatus);
        }
    }
    return mListener->OnStopRequest(static_cast<nsIViewSourceChannel*>
                                               (this),
                                    aContext, aStatus);
}


// nsIStreamListener methods
NS_IMETHODIMP
nsViewSourceChannel::OnDataAvailable(nsIRequest *aRequest, nsISupports* aContext,
                                     nsIInputStream *aInputStream,
                                     uint64_t aSourceOffset,
                                     uint32_t aLength) 
{
    NS_ENSURE_TRUE(mListener, NS_ERROR_FAILURE);
    return mListener->OnDataAvailable(static_cast<nsIViewSourceChannel*>
                                                 (this),
                                      aContext, aInputStream,
                                      aSourceOffset, aLength);
}


// nsIHttpChannel methods

// We want to forward most of nsIHttpChannel over to mHttpChannel, but we want
// to override GetRequestHeader and VisitHeaders. The reason is that we don't
// want various headers like Link: and Refresh: applying to view-source.
NS_IMETHODIMP
nsViewSourceChannel::GetRequestMethod(nsACString & aRequestMethod)
{
    return !mHttpChannel ? NS_ERROR_NULL_POINTER :
        mHttpChannel->GetRequestMethod(aRequestMethod);
}

NS_IMETHODIMP
nsViewSourceChannel::SetRequestMethod(const nsACString & aRequestMethod)
{
    return !mHttpChannel ? NS_ERROR_NULL_POINTER :
        mHttpChannel->SetRequestMethod(aRequestMethod);
}

NS_IMETHODIMP
nsViewSourceChannel::GetReferrer(nsIURI * *aReferrer)
{
    return !mHttpChannel ? NS_ERROR_NULL_POINTER :
        mHttpChannel->GetReferrer(aReferrer);
}

NS_IMETHODIMP
nsViewSourceChannel::SetReferrer(nsIURI * aReferrer)
{
    return !mHttpChannel ? NS_ERROR_NULL_POINTER :
        mHttpChannel->SetReferrer(aReferrer);
}

NS_IMETHODIMP
nsViewSourceChannel::GetRequestHeader(const nsACString & aHeader,
                                      nsACString & aValue)
{
    return !mHttpChannel ? NS_ERROR_NULL_POINTER :
        mHttpChannel->GetRequestHeader(aHeader, aValue);
}

NS_IMETHODIMP
nsViewSourceChannel::SetRequestHeader(const nsACString & aHeader,
                                      const nsACString & aValue,
                                      bool aMerge)
{
    return !mHttpChannel ? NS_ERROR_NULL_POINTER :
        mHttpChannel->SetRequestHeader(aHeader, aValue, aMerge);
}

NS_IMETHODIMP
nsViewSourceChannel::VisitRequestHeaders(nsIHttpHeaderVisitor *aVisitor)
{
    return !mHttpChannel ? NS_ERROR_NULL_POINTER :
        mHttpChannel->VisitRequestHeaders(aVisitor);
}

NS_IMETHODIMP
nsViewSourceChannel::GetAllowPipelining(bool *aAllowPipelining)
{
    return !mHttpChannel ? NS_ERROR_NULL_POINTER :
        mHttpChannel->GetAllowPipelining(aAllowPipelining);
}

NS_IMETHODIMP
nsViewSourceChannel::SetAllowPipelining(bool aAllowPipelining)
{
    return !mHttpChannel ? NS_ERROR_NULL_POINTER :
        mHttpChannel->SetAllowPipelining(aAllowPipelining);
}

NS_IMETHODIMP
nsViewSourceChannel::GetRedirectionLimit(uint32_t *aRedirectionLimit)
{
    return !mHttpChannel ? NS_ERROR_NULL_POINTER :
        mHttpChannel->GetRedirectionLimit(aRedirectionLimit);
}

NS_IMETHODIMP
nsViewSourceChannel::SetRedirectionLimit(uint32_t aRedirectionLimit)
{
    return !mHttpChannel ? NS_ERROR_NULL_POINTER :
        mHttpChannel->SetRedirectionLimit(aRedirectionLimit);
}

NS_IMETHODIMP
nsViewSourceChannel::GetResponseStatus(uint32_t *aResponseStatus)
{
    return !mHttpChannel ? NS_ERROR_NULL_POINTER :
        mHttpChannel->GetResponseStatus(aResponseStatus);
}

NS_IMETHODIMP
nsViewSourceChannel::GetResponseStatusText(nsACString & aResponseStatusText)
{
    return !mHttpChannel ? NS_ERROR_NULL_POINTER :
        mHttpChannel->GetResponseStatusText(aResponseStatusText);
}

NS_IMETHODIMP
nsViewSourceChannel::GetRequestSucceeded(bool *aRequestSucceeded)
{
    return !mHttpChannel ? NS_ERROR_NULL_POINTER :
        mHttpChannel->GetRequestSucceeded(aRequestSucceeded);
}

NS_IMETHODIMP
nsViewSourceChannel::GetResponseHeader(const nsACString & aHeader,
                                       nsACString & aValue)
{
    if (!mHttpChannel)
        return NS_ERROR_NULL_POINTER;

    if (!aHeader.Equals(NS_LITERAL_CSTRING("Content-Type"),
                        nsCaseInsensitiveCStringComparator()) &&
        !aHeader.Equals(NS_LITERAL_CSTRING("X-Content-Security-Policy"),
                        nsCaseInsensitiveCStringComparator()) &&
        !aHeader.Equals(NS_LITERAL_CSTRING("X-Content-Security-Policy-Report-Only"),
                        nsCaseInsensitiveCStringComparator()) &&
        !aHeader.Equals(NS_LITERAL_CSTRING("Content-Security-Policy"),
                        nsCaseInsensitiveCStringComparator()) &&
        !aHeader.Equals(NS_LITERAL_CSTRING("Content-Security-Policy-Report-Only"),
                        nsCaseInsensitiveCStringComparator()) &&
        !aHeader.Equals(NS_LITERAL_CSTRING("X-Frame-Options"),
                        nsCaseInsensitiveCStringComparator())) {
        aValue.Truncate();
        return NS_OK;
    }
        
    return mHttpChannel->GetResponseHeader(aHeader, aValue);
}

NS_IMETHODIMP
nsViewSourceChannel::SetResponseHeader(const nsACString & header,
                                       const nsACString & value, bool merge)
{
    return !mHttpChannel ? NS_ERROR_NULL_POINTER :
        mHttpChannel->SetResponseHeader(header, value, merge);
}

NS_IMETHODIMP
nsViewSourceChannel::VisitResponseHeaders(nsIHttpHeaderVisitor *aVisitor)
{
    if (!mHttpChannel)
        return NS_ERROR_NULL_POINTER;

    NS_NAMED_LITERAL_CSTRING(contentTypeStr, "Content-Type");
    nsAutoCString contentType;
    nsresult rv =
        mHttpChannel->GetResponseHeader(contentTypeStr, contentType);
    if (NS_SUCCEEDED(rv))
        aVisitor->VisitHeader(contentTypeStr, contentType);
    return NS_OK;
}

NS_IMETHODIMP
nsViewSourceChannel::IsNoStoreResponse(bool *_retval)
{
    return !mHttpChannel ? NS_ERROR_NULL_POINTER :
        mHttpChannel->IsNoStoreResponse(_retval);
}

NS_IMETHODIMP
nsViewSourceChannel::IsNoCacheResponse(bool *_retval)
{
    return !mHttpChannel ? NS_ERROR_NULL_POINTER :
        mHttpChannel->IsNoCacheResponse(_retval);
}

NS_IMETHODIMP
nsViewSourceChannel::RedirectTo(nsIURI *uri)
{
    return !mHttpChannel ? NS_ERROR_NULL_POINTER :
        mHttpChannel->RedirectTo(uri);
}