Ziele Untersuchung
mit Columbo Integrität von
Datenbanken Interaktion und
Portierbarkeit Ergonomie der
Schnittstellen

Angebot Produkte Projekt Beratung

Mittel Analytik Modellierung Sprachen Algebra Logik Hardware Denken Kreativität

Zusammenhänge Gesellschaft Wirtschaft Branche Firma


products/sources/formale Sprachen/C/Firefox/dom/html/ (Browser von der Mozilla Stiftung Version 136.0.1^©) Datei vom 10.2.2025 mit Größe 27 kB

Quelle HTMLFormSubmission.cpp Sprache: C

/* -*- 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/. */

#include "HTMLFormSubmission.h"
#include "HTMLFormElement.h"
#include "HTMLFormSubmissionConstants.h"
#include "nsCOMPtr.h"
#include "nsComponentManagerUtils.h"
#include "nsGkAtoms.h"
#include "nsIFormControl.h"
#include "nsError.h"
#include "nsGenericHTMLElement.h"
#include "nsAttrValueInlines.h"
#include "nsDirectoryServiceDefs.h"
#include "nsStringStream.h"
#include "nsIURI.h"
#include "nsIURIMutator.h"
#include "nsIURL.h"
#include "nsNetUtil.h"
#include "nsLinebreakConverter.h"
#include "nsEscape.h"
#include "nsUnicharUtils.h"
#include "nsIMultiplexInputStream.h"
#include "nsIMIMEInputStream.h"
#include "nsIScriptError.h"
#include "nsCExternalHandlerService.h"
#include "nsContentUtils.h"

#include "mozilla/dom/Document.h"
#include "mozilla/dom/AncestorIterator.h"
#include "mozilla/dom/Directory.h"
#include "mozilla/dom/File.h"
#include "mozilla/StaticPrefs_dom.h"
#include "mozilla/RandomNum.h"

#include <tuple>

namespace mozilla::dom {

namespace {

void SendJSWarning(Document* aDocument, const char* aWarningName,
                   const nsTArray<nsString>& aWarningArgs) {
  nsContentUtils::ReportToConsole(nsIScriptError::warningFlag, "HTML"_ns,
                                  aDocument, nsContentUtils::eFORMS_PROPERTIES,
                                  aWarningName, aWarningArgs);
}

void RetrieveFileName(Blob* aBlob, nsAString& aFilename) {
  if (!aBlob) {
    return;
  }

  RefPtr<File> file = aBlob->ToFile();
  if (file) {
    file->GetName(aFilename);
  }
}

void RetrieveDirectoryName(Directory* aDirectory, nsAString& aDirname) {
  MOZ_ASSERT(aDirectory);

  ErrorResult rv;
  aDirectory->GetName(aDirname, rv);
  if (NS_WARN_IF(rv.Failed())) {
    rv.SuppressException();
    aDirname.Truncate();
  }
}

// --------------------------------------------------------------------------

class FSURLEncoded : public EncodingFormSubmission {
public:
  /**
   * @param aEncoding the character encoding of the form
   * @param aMethod the method of the submit (either NS_FORM_METHOD_GET or
   *        NS_FORM_METHOD_POST).
   */
  FSURLEncoded(nsIURI* aActionURL, const nsAString& aTarget,
               NotNull<const Encoding*> aEncoding, int32_t aMethod,
               Document* aDocument, Element* aSubmitter)
      : EncodingFormSubmission(aActionURL, aTarget, aEncoding, aSubmitter),
        mMethod(aMethod),
        mDocument(aDocument),
        mWarnedFileControl(false) {}

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

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

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

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

protected:
  /**
   * URL encode a Unicode string by encoding it to bytes, converting linebreaks
   * properly, and then escaping many bytes as %xx.
   *
   * @param aStr the string to encode
   * @param aEncoded the encoded string [OUT]
   * @throws NS_ERROR_OUT_OF_MEMORY if we run out of memory
   */
  nsresult URLEncode(const nsAString& aStr, nsACString& aEncoded);

private:
  /**
   * The method of the submit (either NS_FORM_METHOD_GET or
   * NS_FORM_METHOD_POST).
   */
  int32_t mMethod;

  /** The query string so far (the part after the ?) */
  nsCString mQueryString;

  /** The document whose URI to use when reporting errors */
  nsCOMPtr<Document> mDocument;

  /** Whether or not we have warned about a file control not being submitted */
  bool mWarnedFileControl;
};

nsresult FSURLEncoded::AddNameValuePair(const nsAString& aName,
                                        const nsAString& aValue) {
  // Encode value
  nsCString convValue;
  nsresult rv = URLEncode(aValue, convValue);
  NS_ENSURE_SUCCESS(rv, rv);

  // Encode name
  nsAutoCString convName;
  rv = URLEncode(aName, convName);
  NS_ENSURE_SUCCESS(rv, rv);

  // Append data to string
  if (mQueryString.IsEmpty()) {
    mQueryString += convName + "="_ns + convValue;
  } else {
    mQueryString += "&"_ns + convName + "="_ns + convValue;
  }

  return NS_OK;
}

nsresult FSURLEncoded::AddNameBlobPair(const nsAString& aName, Blob* aBlob) {
  if (!mWarnedFileControl) {
    SendJSWarning(mDocument, "ForgotFileEnctypeWarning", nsTArray<nsString>());
    mWarnedFileControl = true;
  }

  nsAutoString filename;
  RetrieveFileName(aBlob, filename);
  return AddNameValuePair(aName, filename);
}

nsresult FSURLEncoded::AddNameDirectoryPair(const nsAString& aName,
                                            Directory* aDirectory) {
  // No warning about because Directory objects are never sent via form.

  nsAutoString dirname;
  RetrieveDirectoryName(aDirectory, dirname);
  return AddNameValuePair(aName, dirname);
}

void HandleMailtoSubject(nsCString& aPath) {
  // Walk through the string and see if we have a subject already.
  bool hasSubject = false;
  bool hasParams = false;
  int32_t paramSep = aPath.FindChar('?');
  while (paramSep != kNotFound && paramSep < (int32_t)aPath.Length()) {
    hasParams = true;

    // Get the end of the name at the = op.  If it is *after* the next &,
    // assume that someone made a parameter without an = in it
    int32_t nameEnd = aPath.FindChar('=', paramSep + 1);
    int32_t nextParamSep = aPath.FindChar('&', paramSep + 1);
    if (nextParamSep == kNotFound) {
      nextParamSep = aPath.Length();
    }

    // If the = op is after the &, this parameter is a name without value.
    // If there is no = op, same thing.
    if (nameEnd == kNotFound || nextParamSep < nameEnd) {
      nameEnd = nextParamSep;
    }

    if (nameEnd != kNotFound) {
      if (Substring(aPath, paramSep + 1, nameEnd - (paramSep + 1))
              .LowerCaseEqualsLiteral("subject")) {
        hasSubject = true;
        break;
      }
    }

    paramSep = nextParamSep;
  }

  // If there is no subject, append a preformed subject to the mailto line
  if (!hasSubject) {
    if (hasParams) {
      aPath.Append('&');
    } else {
      aPath.Append('?');
    }

    // Get the default subject
    nsAutoString brandName;
    nsresult rv = nsContentUtils::GetLocalizedString(
        nsContentUtils::eBRAND_PROPERTIES, "brandShortName", brandName);
    if (NS_FAILED(rv)) return;
    nsAutoString subjectStr;
    rv = nsContentUtils::FormatLocalizedString(
        subjectStr, nsContentUtils::eFORMS_PROPERTIES, "DefaultFormSubject",
        brandName);
    if (NS_FAILED(rv)) return;
    aPath.AppendLiteral("subject=");
    nsCString subjectStrEscaped;
    rv = NS_EscapeURL(NS_ConvertUTF16toUTF8(subjectStr), esc_Query,
                      subjectStrEscaped, mozilla::fallible);
    if (NS_FAILED(rv)) return;

    aPath.Append(subjectStrEscaped);
  }
}

nsresult FSURLEncoded::GetEncodedSubmission(nsIURI* aURI,
                                            nsIInputStream** aPostDataStream,
                                            nsCOMPtr<nsIURI>& aOutURI) {
  nsresult rv = NS_OK;
  aOutURI = aURI;

  *aPostDataStream = nullptr;

  if (mMethod == NS_FORM_METHOD_POST) {
    if (aURI->SchemeIs("mailto")) {
      nsAutoCString path;
      rv = aURI->GetPathQueryRef(path);
      NS_ENSURE_SUCCESS(rv, rv);

      HandleMailtoSubject(path);

      // Append the body to and force-plain-text args to the mailto line
      nsAutoCString escapedBody;
      if (NS_WARN_IF(!NS_Escape(mQueryString, escapedBody, url_XAlphas))) {
        return NS_ERROR_OUT_OF_MEMORY;
      }

      path += "&force-plain-text=Y&body="_ns + escapedBody;

      return NS_MutateURI(aURI).SetPathQueryRef(path).Finalize(aOutURI);
    } else {
      nsCOMPtr<nsIInputStream> dataStream;
      rv = NS_NewCStringInputStream(getter_AddRefs(dataStream),
                                    std::move(mQueryString));
      NS_ENSURE_SUCCESS(rv, rv);
      mQueryString.Truncate();

      nsCOMPtr<nsIMIMEInputStream> mimeStream(
          do_CreateInstance("@mozilla.org/network/mime-input-stream;1", &rv));
      NS_ENSURE_SUCCESS(rv, rv);

      mimeStream->AddHeader("Content-Type",
                            "application/x-www-form-urlencoded");
      mimeStream->SetData(dataStream);

      mimeStream.forget(aPostDataStream);
    }

  } else {
    // Get the full query string
    if (aURI->SchemeIs("javascript")) {
      return NS_OK;
    }

    nsCOMPtr<nsIURL> url = do_QueryInterface(aURI);
    if (url) {
      // Make sure that we end up with a query component in the URL.  If
      // mQueryString is empty, nsIURI::SetQuery() will remove the query
      // component, which is not what we want.
      rv = NS_MutateURI(aURI)
               .SetQuery(mQueryString.IsEmpty() ? "?"_ns : mQueryString)
               .Finalize(aOutURI);
    } else {
      nsAutoCString path;
      rv = aURI->GetPathQueryRef(path);
      NS_ENSURE_SUCCESS(rv, rv);
      // Bug 42616: Trim off named anchor and save it to add later
      int32_t namedAnchorPos = path.FindChar('#');
      nsAutoCString namedAnchor;
      if (kNotFound != namedAnchorPos) {
        path.Right(namedAnchor, (path.Length() - namedAnchorPos));
        path.Truncate(namedAnchorPos);
      }

      // Chop off old query string (bug 25330, 57333)
      // Only do this for GET not POST (bug 41585)
      int32_t queryStart = path.FindChar('?');
      if (kNotFound != queryStart) {
        path.Truncate(queryStart);
      }

      path.Append('?');
      // Bug 42616: Add named anchor to end after query string
      path.Append(mQueryString + namedAnchor);

      rv = NS_MutateURI(aURI).SetPathQueryRef(path).Finalize(aOutURI);
    }
  }

  return rv;
}

// i18n helper routines
nsresult FSURLEncoded::URLEncode(const nsAString& aStr, nsACString& aEncoded) {
  nsAutoCString encodedBuf;
  // We encode with eValueEncode because the urlencoded format needs the newline
  // normalizations but percent-escapes characters that eNameEncode doesn't,
  // so calling NS_Escape would still be needed.
  nsresult rv = EncodeVal(aStr, encodedBuf, EncodeType::eValueEncode);
  NS_ENSURE_SUCCESS(rv, rv);

  if (NS_WARN_IF(!NS_Escape(encodedBuf, aEncoded, url_XPAlphas))) {
    return NS_ERROR_OUT_OF_MEMORY;
  }

  return NS_OK;
}

}  // anonymous namespace

// --------------------------------------------------------------------------

FSMultipartFormData::FSMultipartFormData(nsIURI* aActionURL,
                                         const nsAString& aTarget,
                                         NotNull<const Encoding*> aEncoding,
                                         Element* aSubmitter)
    : EncodingFormSubmission(aActionURL, aTarget, aEncoding, aSubmitter) {
  mPostData = do_CreateInstance("@mozilla.org/io/multiplex-input-stream;1");

  nsCOMPtr<nsIInputStream> inputStream = do_QueryInterface(mPostData);
  MOZ_ASSERT(SameCOMIdentity(mPostData, inputStream));
  mPostDataStream = inputStream;

  mTotalLength = 0;

  mBoundary.AssignLiteral("----geckoformboundary");
  mBoundary.AppendInt(mozilla::RandomUint64OrDie(), 16);
  mBoundary.AppendInt(mozilla::RandomUint64OrDie(), 16);
}

FSMultipartFormData::~FSMultipartFormData() {
  NS_ASSERTION(mPostDataChunk.IsEmpty(), "Left unsubmitted data");
}

nsIInputStream* FSMultipartFormData::GetSubmissionBody(
    uint64_t* aContentLength) {
  // Finish data
  mPostDataChunk += "--"_ns + mBoundary + nsLiteralCString("--" CRLF);

  // Add final data input stream
  AddPostDataStream();

  *aContentLength = mTotalLength;
  return mPostDataStream;
}

nsresult FSMultipartFormData::AddNameValuePair(const nsAString& aName,
                                               const nsAString& aValue) {
  nsAutoCString encodedVal;
  nsresult rv = EncodeVal(aValue, encodedVal, EncodeType::eValueEncode);
  NS_ENSURE_SUCCESS(rv, rv);

  nsAutoCString nameStr;
  rv = EncodeVal(aName, nameStr, EncodeType::eNameEncode);
  NS_ENSURE_SUCCESS(rv, rv);

  // Make MIME block for name/value pair

  mPostDataChunk += "--"_ns + mBoundary + nsLiteralCString(CRLF) +
                    "Content-Disposition: form-data; name=\""_ns + nameStr +
                    nsLiteralCString("\"" CRLF CRLF) + encodedVal +
                    nsLiteralCString(CRLF);

  return NS_OK;
}

nsresult FSMultipartFormData::AddNameBlobPair(const nsAString& aName,
                                              Blob* aBlob) {
  MOZ_ASSERT(aBlob);

  // Encode the control name
  nsAutoCString nameStr;
  nsresult rv = EncodeVal(aName, nameStr, EncodeType::eNameEncode);
  NS_ENSURE_SUCCESS(rv, rv);

  ErrorResult error;

  uint64_t size = 0;
  nsAutoCString filename;
  nsAutoCString contentType;
  nsCOMPtr<nsIInputStream> fileStream;
  nsAutoString filename16;

  RefPtr<File> file = aBlob->ToFile();
  if (file) {
    nsAutoString relativePath;
    file->GetRelativePath(relativePath);
    if (StaticPrefs::dom_webkitBlink_dirPicker_enabled() &&
        !relativePath.IsEmpty()) {
      filename16 = relativePath;
    }

    if (filename16.IsEmpty()) {
      RetrieveFileName(aBlob, filename16);
    }
  }

  rv = EncodeVal(filename16, filename, EncodeType::eFilenameEncode);
  NS_ENSURE_SUCCESS(rv, rv);

  // Get content type
  nsAutoString contentType16;
  aBlob->GetType(contentType16);
  if (contentType16.IsEmpty()) {
    contentType16.AssignLiteral("application/octet-stream");
  }

  NS_ConvertUTF16toUTF8 contentType8(contentType16);
  int32_t convertedBufLength = 0;
  char* convertedBuf = nsLinebreakConverter::ConvertLineBreaks(
      contentType8.get(), nsLinebreakConverter::eLinebreakAny,
      nsLinebreakConverter::eLinebreakSpace, contentType8.Length(),
      &convertedBufLength);
  contentType.Adopt(convertedBuf, convertedBufLength);

  // Get input stream
  aBlob->CreateInputStream(getter_AddRefs(fileStream), error);
  if (NS_WARN_IF(error.Failed())) {
    return error.StealNSResult();
  }

  // Get size
  size = aBlob->GetSize(error);
  if (error.Failed()) {
    error.SuppressException();
    fileStream = nullptr;
  }

  if (fileStream) {
    // Create buffered stream (for efficiency)
    nsCOMPtr<nsIInputStream> bufferedStream;
    rv = NS_NewBufferedInputStream(getter_AddRefs(bufferedStream),
                                   fileStream.forget(), 8192);
    NS_ENSURE_SUCCESS(rv, rv);

    fileStream = bufferedStream;
  }

  AddDataChunk(nameStr, filename, contentType, fileStream, size);
  return NS_OK;
}

nsresult FSMultipartFormData::AddNameDirectoryPair(const nsAString& aName,
                                                   Directory* aDirectory) {
  if (!StaticPrefs::dom_webkitBlink_dirPicker_enabled()) {
    return NS_OK;
  }

  // Encode the control name
  nsAutoCString nameStr;
  nsresult rv = EncodeVal(aName, nameStr, EncodeType::eNameEncode);
  NS_ENSURE_SUCCESS(rv, rv);

  nsAutoCString dirname;
  nsAutoString dirname16;

  ErrorResult error;
  nsAutoString path;
  aDirectory->GetPath(path, error);
  if (NS_WARN_IF(error.Failed())) {
    error.SuppressException();
  } else {
    dirname16 = path;
  }

  if (dirname16.IsEmpty()) {
    RetrieveDirectoryName(aDirectory, dirname16);
  }

  rv = EncodeVal(dirname16, dirname, EncodeType::eFilenameEncode);
  NS_ENSURE_SUCCESS(rv, rv);

  AddDataChunk(nameStr, dirname, "application/octet-stream"_ns, nullptr, 0);
  return NS_OK;
}

void FSMultipartFormData::AddDataChunk(const nsACString& aName,
                                       const nsACString& aFilename,
                                       const nsACString& aContentType,
                                       nsIInputStream* aInputStream,
                                       uint64_t aInputStreamSize) {
  //
  // Make MIME block for name/value pair
  //
  // more appropriate than always using binary?
  mPostDataChunk += "--"_ns + mBoundary + nsLiteralCString(CRLF);
  mPostDataChunk += "Content-Disposition: form-data; name=\""_ns + aName +
                    "\"; filename=\""_ns + aFilename +
                    nsLiteralCString("\"" CRLF) + "Content-Type: "_ns +
                    aContentType + nsLiteralCString(CRLF CRLF);

  // We should not try to append an invalid stream. That will happen for example
  // if we try to update a file that actually do not exist.
  if (aInputStream) {
    // We need to dump the data up to this point into the POST data stream
    // here, since we're about to add the file input stream
    AddPostDataStream();

    mPostData->AppendStream(aInputStream);
    mTotalLength += aInputStreamSize;
  }

  // CRLF after file
  mPostDataChunk.AppendLiteral(CRLF);
}

nsresult FSMultipartFormData::GetEncodedSubmission(
    nsIURI* aURI, nsIInputStream** aPostDataStream, nsCOMPtr<nsIURI>& aOutURI) {
  nsresult rv;
  aOutURI = aURI;

  // Make header
  nsCOMPtr<nsIMIMEInputStream> mimeStream =
      do_CreateInstance("@mozilla.org/network/mime-input-stream;1", &rv);
  NS_ENSURE_SUCCESS(rv, rv);

  nsAutoCString contentType;
  GetContentType(contentType);
  mimeStream->AddHeader("Content-Type", contentType.get());

  uint64_t bodySize;
  mimeStream->SetData(GetSubmissionBody(&bodySize));

  mimeStream.forget(aPostDataStream);

  return NS_OK;
}

nsresult FSMultipartFormData::AddPostDataStream() {
  nsresult rv = NS_OK;

  nsCOMPtr<nsIInputStream> postDataChunkStream;
  rv = NS_NewCStringInputStream(getter_AddRefs(postDataChunkStream),
                                mPostDataChunk);
  NS_ASSERTION(postDataChunkStream, "Could not open a stream for POST!");
  if (postDataChunkStream) {
    mPostData->AppendStream(postDataChunkStream);
    mTotalLength += mPostDataChunk.Length();
  }

  mPostDataChunk.Truncate();

  return rv;
}

// --------------------------------------------------------------------------

namespace {

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

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

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

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

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

private:
  nsString mBody;
};

nsresult FSTextPlain::AddNameValuePair(const nsAString& aName,
                                       const nsAString& aValue) {
  // XXX This won't work well with a name like "a=b" or "a\nb" but I suppose
  // text/plain doesn't care about that.  Parsers aren't built for escaped
  // values so we'll have to live with it.
  mBody.Append(aName + u"="_ns + aValue + NS_LITERAL_STRING_FROM_CSTRING(CRLF));

  return NS_OK;
}

nsresult FSTextPlain::AddNameBlobPair(const nsAString& aName, Blob* aBlob) {
  nsAutoString filename;
  RetrieveFileName(aBlob, filename);
  AddNameValuePair(aName, filename);
  return NS_OK;
}

nsresult FSTextPlain::AddNameDirectoryPair(const nsAString& aName,
                                           Directory* aDirectory) {
  nsAutoString dirname;
  RetrieveDirectoryName(aDirectory, dirname);
  AddNameValuePair(aName, dirname);
  return NS_OK;
}

nsresult FSTextPlain::GetEncodedSubmission(nsIURI* aURI,
                                           nsIInputStream** aPostDataStream,
                                           nsCOMPtr<nsIURI>& aOutURI) {
  nsresult rv = NS_OK;
  aOutURI = aURI;

  *aPostDataStream = nullptr;

  // XXX HACK We are using the standard URL mechanism to give the body to the
  // mailer instead of passing the post data stream to it, since that sounds
  // hard.
  if (aURI->SchemeIs("mailto")) {
    nsAutoCString path;
    rv = aURI->GetPathQueryRef(path);
    NS_ENSURE_SUCCESS(rv, rv);

    HandleMailtoSubject(path);

    // Append the body to and force-plain-text args to the mailto line
    nsAutoCString escapedBody;
    if (NS_WARN_IF(!NS_Escape(NS_ConvertUTF16toUTF8(mBody), escapedBody,
                              url_XAlphas))) {
      return NS_ERROR_OUT_OF_MEMORY;
    }

    path += "&force-plain-text=Y&body="_ns + escapedBody;

    rv = NS_MutateURI(aURI).SetPathQueryRef(path).Finalize(aOutURI);
  } else {
    // Create data stream.
    // We use eValueEncode to send the data through the charset encoder and to
    // normalize linebreaks to use the "standard net" format (\r\n), but not
    // perform any other escaping. This means that names and values which
    // contain '=' or newlines are potentially ambiguously encoded, but that is
    // how text/plain is specced.
    nsCString cbody;
    EncodeVal(mBody, cbody, EncodeType::eValueEncode);

    nsCOMPtr<nsIInputStream> bodyStream;
    rv = NS_NewCStringInputStream(getter_AddRefs(bodyStream), std::move(cbody));
    if (!bodyStream) {
      return NS_ERROR_OUT_OF_MEMORY;
    }

    // Create mime stream with headers and such
    nsCOMPtr<nsIMIMEInputStream> mimeStream =
        do_CreateInstance("@mozilla.org/network/mime-input-stream;1", &rv);
    NS_ENSURE_SUCCESS(rv, rv);

    mimeStream->AddHeader("Content-Type", "text/plain");
    mimeStream->SetData(bodyStream);
    mimeStream.forget(aPostDataStream);
  }

  return rv;
}

}  // anonymous namespace

// --------------------------------------------------------------------------

HTMLFormSubmission::HTMLFormSubmission(
    nsIURI* aActionURL, const nsAString& aTarget,
    mozilla::NotNull<const mozilla::Encoding*> aEncoding)
    : mActionURL(aActionURL),
      mTarget(aTarget),
      mEncoding(aEncoding),
      mInitiatedFromUserInput(UserActivation::IsHandlingUserInput()) {
  MOZ_COUNT_CTOR(HTMLFormSubmission);
}

EncodingFormSubmission::EncodingFormSubmission(
    nsIURI* aActionURL, const nsAString& aTarget,
    NotNull<const Encoding*> aEncoding, Element* aSubmitter)
    : HTMLFormSubmission(aActionURL, aTarget, aEncoding) {
  if (!aEncoding->CanEncodeEverything()) {
    nsAutoCString name;
    aEncoding->Name(name);
    AutoTArray<nsString, 1> args;
    CopyUTF8toUTF16(name, *args.AppendElement());
    SendJSWarning(aSubmitter ? aSubmitter->GetOwnerDocument() : nullptr,
                  "CannotEncodeAllUnicode", args);
  }
}

EncodingFormSubmission::~EncodingFormSubmission() = default;

// i18n helper routines
nsresult EncodingFormSubmission::EncodeVal(const nsAString& aStr,
                                           nsCString& aOut,
                                           EncodeType aEncodeType) {
  nsresult rv;
  std::tie(rv, std::ignore) = mEncoding->Encode(aStr, aOut);
  if (NS_FAILED(rv)) {
    return rv;
  }

  if (aEncodeType != EncodeType::eFilenameEncode) {
    // Normalize newlines
    int32_t convertedBufLength = 0;
    char* convertedBuf = nsLinebreakConverter::ConvertLineBreaks(
        aOut.get(), nsLinebreakConverter::eLinebreakAny,
        nsLinebreakConverter::eLinebreakNet, (int32_t)aOut.Length(),
        &convertedBufLength);
    aOut.Adopt(convertedBuf, convertedBufLength);
  }

  if (aEncodeType != EncodeType::eValueEncode) {
    // Percent-escape LF, CR and double quotes.
    int32_t offset = 0;
    while ((offset = aOut.FindCharInSet("\n\r\"", offset)) != kNotFound) {
      if (aOut[offset] == '\n') {
        aOut.ReplaceLiteral(offset, 1, "%0A");
      } else if (aOut[offset] == '\r') {
        aOut.ReplaceLiteral(offset, 1, "%0D");
      } else if (aOut[offset] == '"') {
        aOut.ReplaceLiteral(offset, 1, "%22");
      } else {
        MOZ_ASSERT(false);
        offset++;
        continue;
      }
    }
  }

  return NS_OK;
}

// --------------------------------------------------------------------------

namespace {

void GetEnumAttr(nsGenericHTMLElement* aContent, nsAtom* atom,
                 int32_t* aValue) {
  const nsAttrValue* value = aContent->GetParsedAttr(atom);
  if (value && value->Type() == nsAttrValue::eEnum) {
    *aValue = value->GetEnumValue();
  }
}

}  // anonymous namespace

/* static */
nsresult HTMLFormSubmission::GetFromForm(HTMLFormElement* aForm,
                                         nsGenericHTMLElement* aSubmitter,
                                         NotNull<const Encoding*>& aEncoding,
                                         HTMLFormSubmission** aFormSubmission) {
  // Get all the information necessary to encode the form data
  NS_ASSERTION(aForm->GetComposedDoc(),
               "Should have doc if we're building submission!");

  nsresult rv;

  // Get method (default: GET)
  int32_t method = NS_FORM_METHOD_GET;
  if (aSubmitter && aSubmitter->HasAttr(nsGkAtoms::formmethod)) {
    GetEnumAttr(aSubmitter, nsGkAtoms::formmethod, &method);
  } else {
    GetEnumAttr(aForm, nsGkAtoms::method, &method);
  }

  if (method == NS_FORM_METHOD_DIALOG) {
    HTMLDialogElement* dialog = aForm->FirstAncestorOfType<HTMLDialogElement>();

    // If there isn't one, do nothing.
    if (!dialog) {
      return NS_ERROR_FAILURE;
    }

    nsAutoString result;
    if (aSubmitter) {
      aSubmitter->ResultForDialogSubmit(result);
    }
    *aFormSubmission = new DialogFormSubmission(result, aEncoding, dialog);
    return NS_OK;
  }

  MOZ_ASSERT(method != NS_FORM_METHOD_DIALOG);

  // Get action
  nsCOMPtr<nsIURI> actionURL;
  rv = aForm->GetActionURL(getter_AddRefs(actionURL), aSubmitter);
  NS_ENSURE_SUCCESS(rv, rv);

  // Check if CSP allows this form-action
  nsCOMPtr<nsIContentSecurityPolicy> csp = aForm->GetCsp();
  if (csp) {
    bool permitsFormAction = true;

    // form-action is only enforced if explicitly defined in the
    // policy - do *not* consult default-src, see:
    // http://www.w3.org/TR/CSP2/#directive-default-src
    rv = csp->Permits(aForm, nullptr /* nsICSPEventListener */, actionURL,
                      nsIContentSecurityPolicy::FORM_ACTION_DIRECTIVE,
                      true /* aSpecific */, true /* aSendViolationReports */,
                      &permitsFormAction);
    NS_ENSURE_SUCCESS(rv, rv);
    if (!permitsFormAction) {
      return NS_ERROR_CSP_FORM_ACTION_VIOLATION;
    }
  }

  // Get target
  nsAutoString target;
  aForm->GetSubmissionTarget(aSubmitter, target);

  // Get encoding type (default: urlencoded)
  int32_t enctype = NS_FORM_ENCTYPE_URLENCODED;
  if (aSubmitter && aSubmitter->HasAttr(nsGkAtoms::formenctype)) {
    GetEnumAttr(aSubmitter, nsGkAtoms::formenctype, &enctype);
  } else {
    GetEnumAttr(aForm, nsGkAtoms::enctype, &enctype);
  }

  // Choose encoder
  if (method == NS_FORM_METHOD_POST && enctype == NS_FORM_ENCTYPE_MULTIPART) {
    *aFormSubmission =
        new FSMultipartFormData(actionURL, target, aEncoding, aSubmitter);
  } else if (method == NS_FORM_METHOD_POST &&
             enctype == NS_FORM_ENCTYPE_TEXTPLAIN) {
    *aFormSubmission =
        new FSTextPlain(actionURL, target, aEncoding, aSubmitter);
  } else {
    Document* doc = aForm->OwnerDoc();
    if (enctype == NS_FORM_ENCTYPE_MULTIPART ||
        enctype == NS_FORM_ENCTYPE_TEXTPLAIN) {
      AutoTArray<nsString, 1> args;
      nsString& enctypeStr = *args.AppendElement();
      if (aSubmitter && aSubmitter->HasAttr(nsGkAtoms::formenctype)) {
        aSubmitter->GetAttr(nsGkAtoms::formenctype, enctypeStr);
      } else {
        aForm->GetAttr(nsGkAtoms::enctype, enctypeStr);
      }

      SendJSWarning(doc, "ForgotPostWarning", args);
    }
    *aFormSubmission =
        new FSURLEncoded(actionURL, target, aEncoding, method, doc, aSubmitter);
  }

  return NS_OK;
}

}  // namespace mozilla::dom

quality98%

¤ Dauer der Verarbeitung: 0.18 Sekunden (vorverarbeitet) ¤

Wurzel

Suchen

Beweissystem der NASA

Beweissystem Isabelle

NIST Cobol Testsuite

Cephes Mathematical Library

Wiener Entwicklungsmethode

Haftungshinweis

Die Informationen auf dieser Webseite wurden nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit, noch Qualität der bereit gestellten Informationen zugesichert.