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gecko-dev/dom/html/nsFormSubmission.cpp
Andrea Marchesini 61b9bd0496 Bug 1166231 - Make nsIDOMBlob an empty interface, r=ehsan
2015-05-19 15:36:37 +01:00

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/* -*- 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 "nsFormSubmission.h"
#include "nsCOMPtr.h"
#include "nsIForm.h"
#include "nsILinkHandler.h"
#include "nsIDocument.h"
#include "nsGkAtoms.h"
#include "nsIFormControl.h"
#include "nsIDOMHTMLFormElement.h"
#include "nsError.h"
#include "nsGenericHTMLElement.h"
#include "nsAttrValueInlines.h"
#include "nsISaveAsCharset.h"
#include "nsIFile.h"
#include "nsDirectoryServiceDefs.h"
#include "nsStringStream.h"
#include "nsIURI.h"
#include "nsIURL.h"
#include "nsNetUtil.h"
#include "nsLinebreakConverter.h"
#include "nsEscape.h"
#include "nsUnicharUtils.h"
#include "nsIMultiplexInputStream.h"
#include "nsIMIMEInputStream.h"
#include "nsIMIMEService.h"
#include "nsIConsoleService.h"
#include "nsIScriptError.h"
#include "nsIStringBundle.h"
#include "nsCExternalHandlerService.h"
#include "nsIFileStreams.h"
#include "nsContentUtils.h"
#include "mozilla/dom/EncodingUtils.h"
#include "mozilla/dom/File.h"
using namespace mozilla;
using mozilla::dom::EncodingUtils;
static void
SendJSWarning(nsIDocument* aDocument,
const char* aWarningName,
const char16_t** aWarningArgs, uint32_t aWarningArgsLen)
{
nsContentUtils::ReportToConsole(nsIScriptError::warningFlag,
NS_LITERAL_CSTRING("HTML"), aDocument,
nsContentUtils::eFORMS_PROPERTIES,
aWarningName,
aWarningArgs, aWarningArgsLen);
}
// --------------------------------------------------------------------------
class nsFSURLEncoded : public nsEncodingFormSubmission
{
public:
/**
* @param aCharset the charset of the form as a string
* @param aMethod the method of the submit (either NS_FORM_METHOD_GET or
* NS_FORM_METHOD_POST).
*/
nsFSURLEncoded(const nsACString& aCharset,
int32_t aMethod,
nsIDocument* aDocument,
nsIContent* aOriginatingElement)
: nsEncodingFormSubmission(aCharset, aOriginatingElement),
mMethod(aMethod),
mDocument(aDocument),
mWarnedFileControl(false)
{
}
virtual nsresult AddNameValuePair(const nsAString& aName,
const nsAString& aValue) override;
virtual nsresult AddNameFilePair(const nsAString& aName,
File* aFile) override;
virtual nsresult GetEncodedSubmission(nsIURI* aURI,
nsIInputStream** aPostDataStream)
override;
virtual bool SupportsIsindexSubmission() override
{
return true;
}
virtual nsresult AddIsindex(const nsAString& aValue) 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, nsCString& 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<nsIDocument> mDocument;
/** Whether or not we have warned about a file control not being submitted */
bool mWarnedFileControl;
};
nsresult
nsFSURLEncoded::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_LITERAL_CSTRING("=") + convValue;
} else {
mQueryString += NS_LITERAL_CSTRING("&") + convName
+ NS_LITERAL_CSTRING("=") + convValue;
}
return NS_OK;
}
nsresult
nsFSURLEncoded::AddIsindex(const nsAString& aValue)
{
// Encode value
nsCString convValue;
nsresult rv = URLEncode(aValue, convValue);
NS_ENSURE_SUCCESS(rv, rv);
// Append data to string
if (mQueryString.IsEmpty()) {
mQueryString.Assign(convValue);
} else {
mQueryString += NS_LITERAL_CSTRING("&isindex=") + convValue;
}
return NS_OK;
}
nsresult
nsFSURLEncoded::AddNameFilePair(const nsAString& aName,
File* aFile)
{
if (!mWarnedFileControl) {
SendJSWarning(mDocument, "ForgotFileEnctypeWarning", nullptr, 0);
mWarnedFileControl = true;
}
nsAutoString filename;
if (aFile) {
aFile->GetName(filename);
}
return AddNameValuePair(aName, filename);
}
static 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
nsXPIDLString brandName;
nsresult rv =
nsContentUtils::GetLocalizedString(nsContentUtils::eBRAND_PROPERTIES,
"brandShortName", brandName);
if (NS_FAILED(rv))
return;
const char16_t *formatStrings[] = { brandName.get() };
nsXPIDLString subjectStr;
rv = nsContentUtils::FormatLocalizedString(
nsContentUtils::eFORMS_PROPERTIES,
"DefaultFormSubject",
formatStrings,
subjectStr);
if (NS_FAILED(rv))
return;
aPath.AppendLiteral("subject=");
nsCString subjectStrEscaped;
aPath.Append(NS_EscapeURL(NS_ConvertUTF16toUTF8(subjectStr), esc_Query,
subjectStrEscaped));
}
}
nsresult
nsFSURLEncoded::GetEncodedSubmission(nsIURI* aURI,
nsIInputStream** aPostDataStream)
{
nsresult rv = NS_OK;
*aPostDataStream = nullptr;
if (mMethod == NS_FORM_METHOD_POST) {
bool isMailto = false;
aURI->SchemeIs("mailto", &isMailto);
if (isMailto) {
nsAutoCString path;
rv = aURI->GetPath(path);
NS_ENSURE_SUCCESS(rv, rv);
HandleMailtoSubject(path);
// Append the body to and force-plain-text args to the mailto line
nsCString escapedBody;
escapedBody.Adopt(nsEscape(mQueryString.get(), url_XAlphas));
path += NS_LITERAL_CSTRING("&force-plain-text=Y&body=") + escapedBody;
rv = aURI->SetPath(path);
} else {
nsCOMPtr<nsIInputStream> dataStream;
// XXX We *really* need to either get the string to disown its data (and
// not destroy it), or make a string input stream that owns the CString
// that is passed to it. Right now this operation does a copy.
rv = NS_NewCStringInputStream(getter_AddRefs(dataStream), mQueryString);
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIMIMEInputStream> mimeStream(
do_CreateInstance("@mozilla.org/network/mime-input-stream;1", &rv));
NS_ENSURE_SUCCESS(rv, rv);
#ifdef SPECIFY_CHARSET_IN_CONTENT_TYPE
mimeStream->AddHeader("Content-Type",
PromiseFlatString(
"application/x-www-form-urlencoded; charset="
+ mCharset
).get());
#else
mimeStream->AddHeader("Content-Type",
"application/x-www-form-urlencoded");
#endif
mimeStream->SetAddContentLength(true);
mimeStream->SetData(dataStream);
*aPostDataStream = mimeStream;
NS_ADDREF(*aPostDataStream);
}
} else {
// Get the full query string
bool schemeIsJavaScript;
rv = aURI->SchemeIs("javascript", &schemeIsJavaScript);
NS_ENSURE_SUCCESS(rv, rv);
if (schemeIsJavaScript) {
return NS_OK;
}
nsCOMPtr<nsIURL> url = do_QueryInterface(aURI);
if (url) {
url->SetQuery(mQueryString);
}
else {
nsAutoCString path;
rv = aURI->GetPath(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);
aURI->SetPath(path);
}
}
return rv;
}
// i18n helper routines
nsresult
nsFSURLEncoded::URLEncode(const nsAString& aStr, nsCString& aEncoded)
{
// convert to CRLF breaks
char16_t* convertedBuf =
nsLinebreakConverter::ConvertUnicharLineBreaks(PromiseFlatString(aStr).get(),
nsLinebreakConverter::eLinebreakAny,
nsLinebreakConverter::eLinebreakNet);
NS_ENSURE_TRUE(convertedBuf, NS_ERROR_OUT_OF_MEMORY);
nsAutoCString encodedBuf;
nsresult rv = EncodeVal(nsDependentString(convertedBuf), encodedBuf, false);
free(convertedBuf);
NS_ENSURE_SUCCESS(rv, rv);
char* escapedBuf = nsEscape(encodedBuf.get(), url_XPAlphas);
NS_ENSURE_TRUE(escapedBuf, NS_ERROR_OUT_OF_MEMORY);
aEncoded.Adopt(escapedBuf);
return NS_OK;
}
// --------------------------------------------------------------------------
nsFSMultipartFormData::nsFSMultipartFormData(const nsACString& aCharset,
nsIContent* aOriginatingElement)
: nsEncodingFormSubmission(aCharset, aOriginatingElement)
{
mPostDataStream =
do_CreateInstance("@mozilla.org/io/multiplex-input-stream;1");
mTotalLength = 0;
mBoundary.AssignLiteral("---------------------------");
mBoundary.AppendInt(rand());
mBoundary.AppendInt(rand());
mBoundary.AppendInt(rand());
}
nsFSMultipartFormData::~nsFSMultipartFormData()
{
NS_ASSERTION(mPostDataChunk.IsEmpty(), "Left unsubmitted data");
}
nsIInputStream*
nsFSMultipartFormData::GetSubmissionBody(uint64_t* aContentLength)
{
// Finish data
mPostDataChunk += NS_LITERAL_CSTRING("--") + mBoundary
+ NS_LITERAL_CSTRING("--" CRLF);
// Add final data input stream
AddPostDataStream();
*aContentLength = mTotalLength;
return mPostDataStream;
}
nsresult
nsFSMultipartFormData::AddNameValuePair(const nsAString& aName,
const nsAString& aValue)
{
nsCString valueStr;
nsAutoCString encodedVal;
nsresult rv = EncodeVal(aValue, encodedVal, false);
NS_ENSURE_SUCCESS(rv, rv);
valueStr.Adopt(nsLinebreakConverter::
ConvertLineBreaks(encodedVal.get(),
nsLinebreakConverter::eLinebreakAny,
nsLinebreakConverter::eLinebreakNet));
nsAutoCString nameStr;
rv = EncodeVal(aName, nameStr, true);
NS_ENSURE_SUCCESS(rv, rv);
// Make MIME block for name/value pair
// XXX: name parameter should be encoded per RFC 2231
// RFC 2388 specifies that RFC 2047 be used, but I think it's not
// consistent with MIME standard.
mPostDataChunk += NS_LITERAL_CSTRING("--") + mBoundary
+ NS_LITERAL_CSTRING(CRLF)
+ NS_LITERAL_CSTRING("Content-Disposition: form-data; name=\"")
+ nameStr + NS_LITERAL_CSTRING("\"" CRLF CRLF)
+ valueStr + NS_LITERAL_CSTRING(CRLF);
return NS_OK;
}
nsresult
nsFSMultipartFormData::AddNameFilePair(const nsAString& aName,
File* aFile)
{
// Encode the control name
nsAutoCString nameStr;
nsresult rv = EncodeVal(aName, nameStr, true);
NS_ENSURE_SUCCESS(rv, rv);
nsCString filename, contentType;
nsCOMPtr<nsIInputStream> fileStream;
if (aFile) {
nsAutoString filename16;
aFile->GetName(filename16);
ErrorResult error;
nsAutoString filepath16;
aFile->GetPath(filepath16, error);
if (NS_WARN_IF(error.Failed())) {
return error.StealNSResult();
}
if (!filepath16.IsEmpty()) {
// File.path includes trailing "/"
filename16 = filepath16 + filename16;
}
rv = EncodeVal(filename16, filename, true);
NS_ENSURE_SUCCESS(rv, rv);
// Get content type
nsAutoString contentType16;
aFile->GetType(contentType16);
if (contentType16.IsEmpty()) {
contentType16.AssignLiteral("application/octet-stream");
}
contentType.Adopt(nsLinebreakConverter::
ConvertLineBreaks(NS_ConvertUTF16toUTF8(contentType16).get(),
nsLinebreakConverter::eLinebreakAny,
nsLinebreakConverter::eLinebreakSpace));
// Get input stream
aFile->GetInternalStream(getter_AddRefs(fileStream), error);
if (NS_WARN_IF(error.Failed())) {
return error.StealNSResult();
}
if (fileStream) {
// Create buffered stream (for efficiency)
nsCOMPtr<nsIInputStream> bufferedStream;
rv = NS_NewBufferedInputStream(getter_AddRefs(bufferedStream),
fileStream, 8192);
NS_ENSURE_SUCCESS(rv, rv);
fileStream = bufferedStream;
}
}
else {
contentType.AssignLiteral("application/octet-stream");
}
//
// Make MIME block for name/value pair
//
// more appropriate than always using binary?
mPostDataChunk += NS_LITERAL_CSTRING("--") + mBoundary
+ NS_LITERAL_CSTRING(CRLF);
// XXX: name/filename parameter should be encoded per RFC 2231
// RFC 2388 specifies that RFC 2047 be used, but I think it's not
// consistent with the MIME standard.
mPostDataChunk +=
NS_LITERAL_CSTRING("Content-Disposition: form-data; name=\"")
+ nameStr + NS_LITERAL_CSTRING("\"; filename=\"")
+ filename + NS_LITERAL_CSTRING("\"" CRLF)
+ NS_LITERAL_CSTRING("Content-Type: ")
+ contentType + NS_LITERAL_CSTRING(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 (fileStream) {
ErrorResult error;
uint64_t size = aFile->GetSize(error);
if (error.Failed()) {
error.SuppressException();
} else {
// 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();
mPostDataStream->AppendStream(fileStream);
mTotalLength += size;
}
}
// CRLF after file
mPostDataChunk.AppendLiteral(CRLF);
return NS_OK;
}
nsresult
nsFSMultipartFormData::GetEncodedSubmission(nsIURI* aURI,
nsIInputStream** aPostDataStream)
{
nsresult rv;
// 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());
mimeStream->SetAddContentLength(true);
uint64_t unused;
mimeStream->SetData(GetSubmissionBody(&unused));
mimeStream.forget(aPostDataStream);
return NS_OK;
}
nsresult
nsFSMultipartFormData::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) {
mPostDataStream->AppendStream(postDataChunkStream);
mTotalLength += mPostDataChunk.Length();
}
mPostDataChunk.Truncate();
return rv;
}
// --------------------------------------------------------------------------
class nsFSTextPlain : public nsEncodingFormSubmission
{
public:
nsFSTextPlain(const nsACString& aCharset, nsIContent* aOriginatingElement)
: nsEncodingFormSubmission(aCharset, aOriginatingElement)
{
}
virtual nsresult AddNameValuePair(const nsAString& aName,
const nsAString& aValue) override;
virtual nsresult AddNameFilePair(const nsAString& aName,
File* aFile) override;
virtual nsresult GetEncodedSubmission(nsIURI* aURI,
nsIInputStream** aPostDataStream)
override;
private:
nsString mBody;
};
nsresult
nsFSTextPlain::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 + NS_LITERAL_STRING("=") + aValue +
NS_LITERAL_STRING(CRLF));
return NS_OK;
}
nsresult
nsFSTextPlain::AddNameFilePair(const nsAString& aName,
File* aFile)
{
nsAutoString filename;
if (aFile) {
aFile->GetName(filename);
}
AddNameValuePair(aName, filename);
return NS_OK;
}
nsresult
nsFSTextPlain::GetEncodedSubmission(nsIURI* aURI,
nsIInputStream** aPostDataStream)
{
nsresult rv = NS_OK;
// 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.
bool isMailto = false;
aURI->SchemeIs("mailto", &isMailto);
if (isMailto) {
nsAutoCString path;
rv = aURI->GetPath(path);
NS_ENSURE_SUCCESS(rv, rv);
HandleMailtoSubject(path);
// Append the body to and force-plain-text args to the mailto line
char* escapedBuf = nsEscape(NS_ConvertUTF16toUTF8(mBody).get(),
url_XAlphas);
NS_ENSURE_TRUE(escapedBuf, NS_ERROR_OUT_OF_MEMORY);
nsCString escapedBody;
escapedBody.Adopt(escapedBuf);
path += NS_LITERAL_CSTRING("&force-plain-text=Y&body=") + escapedBody;
rv = aURI->SetPath(path);
} else {
// Create data stream.
// We do want to send the data through the charset encoder and we want to
// normalize linebreaks to use the "standard net" format (\r\n), but we
// don't want to perform any other encoding. This means that names and
// values which contains '=' or newlines are potentially ambigiously
// encoded, but that how text/plain is specced.
nsCString cbody;
EncodeVal(mBody, cbody, false);
cbody.Adopt(nsLinebreakConverter::
ConvertLineBreaks(cbody.get(),
nsLinebreakConverter::eLinebreakAny,
nsLinebreakConverter::eLinebreakNet));
nsCOMPtr<nsIInputStream> bodyStream;
rv = NS_NewCStringInputStream(getter_AddRefs(bodyStream), 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->SetAddContentLength(true);
mimeStream->SetData(bodyStream);
CallQueryInterface(mimeStream, aPostDataStream);
}
return rv;
}
// --------------------------------------------------------------------------
nsEncodingFormSubmission::nsEncodingFormSubmission(const nsACString& aCharset,
nsIContent* aOriginatingElement)
: nsFormSubmission(aCharset, aOriginatingElement)
{
nsAutoCString charset(aCharset);
// canonical name is passed so that we just have to check against
// *our* canonical names listed in charsetaliases.properties
if (charset.EqualsLiteral("ISO-8859-1")) {
charset.AssignLiteral("windows-1252");
}
if (!(charset.EqualsLiteral("UTF-8") || charset.EqualsLiteral("gb18030"))) {
NS_ConvertUTF8toUTF16 charsetUtf16(charset);
const char16_t* charsetPtr = charsetUtf16.get();
SendJSWarning(aOriginatingElement ? aOriginatingElement->GetOwnerDocument()
: nullptr,
"CannotEncodeAllUnicode",
&charsetPtr,
1);
}
mEncoder = do_CreateInstance(NS_SAVEASCHARSET_CONTRACTID);
if (mEncoder) {
nsresult rv =
mEncoder->Init(charset.get(),
(nsISaveAsCharset::attr_EntityAfterCharsetConv +
nsISaveAsCharset::attr_FallbackDecimalNCR),
0);
if (NS_FAILED(rv)) {
mEncoder = nullptr;
}
}
}
nsEncodingFormSubmission::~nsEncodingFormSubmission()
{
}
// i18n helper routines
nsresult
nsEncodingFormSubmission::EncodeVal(const nsAString& aStr, nsCString& aOut,
bool aHeaderEncode)
{
if (mEncoder && !aStr.IsEmpty()) {
aOut.Truncate();
nsresult rv = mEncoder->Convert(PromiseFlatString(aStr).get(),
getter_Copies(aOut));
NS_ENSURE_SUCCESS(rv, rv);
}
else {
// fall back to UTF-8
CopyUTF16toUTF8(aStr, aOut);
}
if (aHeaderEncode) {
aOut.Adopt(nsLinebreakConverter::
ConvertLineBreaks(aOut.get(),
nsLinebreakConverter::eLinebreakAny,
nsLinebreakConverter::eLinebreakSpace));
aOut.ReplaceSubstring(NS_LITERAL_CSTRING("\""),
NS_LITERAL_CSTRING("\\\""));
}
return NS_OK;
}
// --------------------------------------------------------------------------
static void
GetSubmitCharset(nsGenericHTMLElement* aForm,
nsACString& oCharset)
{
oCharset.AssignLiteral("UTF-8"); // default to utf-8
nsAutoString acceptCharsetValue;
aForm->GetAttr(kNameSpaceID_None, nsGkAtoms::acceptcharset,
acceptCharsetValue);
int32_t charsetLen = acceptCharsetValue.Length();
if (charsetLen > 0) {
int32_t offset=0;
int32_t spPos=0;
// get charset from charsets one by one
do {
spPos = acceptCharsetValue.FindChar(char16_t(' '), offset);
int32_t cnt = ((-1==spPos)?(charsetLen-offset):(spPos-offset));
if (cnt > 0) {
nsAutoString uCharset;
acceptCharsetValue.Mid(uCharset, offset, cnt);
if (EncodingUtils::FindEncodingForLabel(uCharset, oCharset))
return;
}
offset = spPos + 1;
} while (spPos != -1);
}
// if there are no accept-charset or all the charset are not supported
// Get the charset from document
nsIDocument* doc = aForm->GetComposedDoc();
if (doc) {
oCharset = doc->GetDocumentCharacterSet();
}
}
static void
GetEnumAttr(nsGenericHTMLElement* aContent,
nsIAtom* atom, int32_t* aValue)
{
const nsAttrValue* value = aContent->GetParsedAttr(atom);
if (value && value->Type() == nsAttrValue::eEnum) {
*aValue = value->GetEnumValue();
}
}
nsresult
GetSubmissionFromForm(nsGenericHTMLElement* aForm,
nsGenericHTMLElement* aOriginatingElement,
nsFormSubmission** aFormSubmission)
{
// Get all the information necessary to encode the form data
NS_ASSERTION(aForm->GetComposedDoc(),
"Should have doc if we're building submission!");
// Get encoding type (default: urlencoded)
int32_t enctype = NS_FORM_ENCTYPE_URLENCODED;
if (aOriginatingElement &&
aOriginatingElement->HasAttr(kNameSpaceID_None, nsGkAtoms::formenctype)) {
GetEnumAttr(aOriginatingElement, nsGkAtoms::formenctype, &enctype);
} else {
GetEnumAttr(aForm, nsGkAtoms::enctype, &enctype);
}
// Get method (default: GET)
int32_t method = NS_FORM_METHOD_GET;
if (aOriginatingElement &&
aOriginatingElement->HasAttr(kNameSpaceID_None, nsGkAtoms::formmethod)) {
GetEnumAttr(aOriginatingElement, nsGkAtoms::formmethod, &method);
} else {
GetEnumAttr(aForm, nsGkAtoms::method, &method);
}
// Get charset
nsAutoCString charset;
GetSubmitCharset(aForm, charset);
// We now have a canonical charset name, so we only have to check it
// against canonical names.
// use UTF-8 for UTF-16* (per WHATWG and existing practice of
// MS IE/Opera).
if (StringBeginsWith(charset, NS_LITERAL_CSTRING("UTF-16"))) {
charset.AssignLiteral("UTF-8");
}
// Choose encoder
if (method == NS_FORM_METHOD_POST &&
enctype == NS_FORM_ENCTYPE_MULTIPART) {
*aFormSubmission = new nsFSMultipartFormData(charset, aOriginatingElement);
} else if (method == NS_FORM_METHOD_POST &&
enctype == NS_FORM_ENCTYPE_TEXTPLAIN) {
*aFormSubmission = new nsFSTextPlain(charset, aOriginatingElement);
} else {
nsIDocument* doc = aForm->OwnerDoc();
if (enctype == NS_FORM_ENCTYPE_MULTIPART ||
enctype == NS_FORM_ENCTYPE_TEXTPLAIN) {
nsAutoString enctypeStr;
if (aOriginatingElement &&
aOriginatingElement->HasAttr(kNameSpaceID_None,
nsGkAtoms::formenctype)) {
aOriginatingElement->GetAttr(kNameSpaceID_None, nsGkAtoms::formenctype,
enctypeStr);
} else {
aForm->GetAttr(kNameSpaceID_None, nsGkAtoms::enctype, enctypeStr);
}
const char16_t* enctypeStrPtr = enctypeStr.get();
SendJSWarning(doc, "ForgotPostWarning",
&enctypeStrPtr, 1);
}
*aFormSubmission = new nsFSURLEncoded(charset, method, doc,
aOriginatingElement);
}
NS_ENSURE_TRUE(*aFormSubmission, NS_ERROR_OUT_OF_MEMORY);
return NS_OK;
}
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