gecko/netwerk/streamconv/converters/nsMultiMixedConv.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nsMultiMixedConv.h"
#include "nsMemory.h"
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#include "nsInt64.h"
#include "plstr.h"
#include "nsIHttpChannel.h"
#include "nsIServiceManager.h"
#include "nsNetUtil.h"
#include "nsMimeTypes.h"
#include "nsIStringStream.h"
#include "nsReadableUtils.h"
#include "nsCRT.h"
#include "nsIHttpChannelInternal.h"
#include "nsURLHelper.h"
#include "nsIStreamConverterService.h"
//
// Helper function for determining the length of data bytes up to
// the next multipart token. A token is usually preceded by a LF
// or CRLF delimiter.
//
static PRUint32
LengthToToken(const char *cursor, const char *token)
{
PRUint32 len = token - cursor;
// Trim off any LF or CRLF preceding the token
if (len && *(token-1) == '\n') {
--len;
if (len && *(token-2) == '\r')
--len;
}
return len;
}
nsPartChannel::nsPartChannel(nsIChannel *aMultipartChannel, PRUint32 aPartID,
nsIStreamListener* aListener) :
mMultipartChannel(aMultipartChannel),
mListener(aListener),
mStatus(NS_OK),
mContentLength(LL_MAXUINT),
mIsByteRangeRequest(PR_FALSE),
mByteRangeStart(0),
mByteRangeEnd(0),
mPartID(aPartID),
mIsLastPart(PR_FALSE)
{
mMultipartChannel = aMultipartChannel;
// Inherit the load flags from the original channel...
mMultipartChannel->GetLoadFlags(&mLoadFlags);
mMultipartChannel->GetLoadGroup(getter_AddRefs(mLoadGroup));
}
nsPartChannel::~nsPartChannel()
{
}
void nsPartChannel::InitializeByteRange(PRInt64 aStart, PRInt64 aEnd)
{
mIsByteRangeRequest = PR_TRUE;
mByteRangeStart = aStart;
mByteRangeEnd = aEnd;
}
nsresult nsPartChannel::SendOnStartRequest(nsISupports* aContext)
{
return mListener->OnStartRequest(this, aContext);
}
nsresult nsPartChannel::SendOnDataAvailable(nsISupports* aContext,
nsIInputStream* aStream,
PRUint32 aOffset, PRUint32 aLen)
{
return mListener->OnDataAvailable(this, aContext, aStream, aOffset, aLen);
}
nsresult nsPartChannel::SendOnStopRequest(nsISupports* aContext,
nsresult aStatus)
{
// Drop the listener
nsCOMPtr<nsIStreamListener> listener;
listener.swap(mListener);
return listener->OnStopRequest(this, aContext, aStatus);
}
//
// nsISupports implementation...
//
NS_IMPL_ADDREF(nsPartChannel)
NS_IMPL_RELEASE(nsPartChannel)
NS_INTERFACE_MAP_BEGIN(nsPartChannel)
NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIChannel)
NS_INTERFACE_MAP_ENTRY(nsIRequest)
NS_INTERFACE_MAP_ENTRY(nsIChannel)
NS_INTERFACE_MAP_ENTRY(nsIByteRangeRequest)
NS_INTERFACE_MAP_ENTRY(nsIMultiPartChannel)
NS_INTERFACE_MAP_END
//
// nsIRequest implementation...
//
NS_IMETHODIMP
nsPartChannel::GetName(nsACString &aResult)
{
return mMultipartChannel->GetName(aResult);
}
NS_IMETHODIMP
nsPartChannel::IsPending(PRBool *aResult)
{
// For now, consider the active lifetime of each part the same as
// the underlying multipart channel... This is not exactly right,
// but it is good enough :-)
return mMultipartChannel->IsPending(aResult);
}
NS_IMETHODIMP
nsPartChannel::GetStatus(nsresult *aResult)
{
nsresult rv = NS_OK;
if (NS_FAILED(mStatus)) {
*aResult = mStatus;
} else {
rv = mMultipartChannel->GetStatus(aResult);
}
return rv;
}
NS_IMETHODIMP
nsPartChannel::Cancel(nsresult aStatus)
{
// Cancelling an individual part must not cancel the underlying
// multipart channel...
// XXX but we should stop sending data for _this_ part channel!
mStatus = aStatus;
return NS_OK;
}
NS_IMETHODIMP
nsPartChannel::Suspend(void)
{
// Suspending an individual part must not suspend the underlying
// multipart channel...
// XXX why not?
return NS_OK;
}
NS_IMETHODIMP
nsPartChannel::Resume(void)
{
// Resuming an individual part must not resume the underlying
// multipart channel...
// XXX why not?
return NS_OK;
}
//
// nsIChannel implementation
//
NS_IMETHODIMP
nsPartChannel::GetOriginalURI(nsIURI * *aURI)
{
return mMultipartChannel->GetOriginalURI(aURI);
}
NS_IMETHODIMP
nsPartChannel::SetOriginalURI(nsIURI *aURI)
{
return mMultipartChannel->SetOriginalURI(aURI);
}
NS_IMETHODIMP
nsPartChannel::GetURI(nsIURI * *aURI)
{
return mMultipartChannel->GetURI(aURI);
}
NS_IMETHODIMP
nsPartChannel::Open(nsIInputStream **result)
{
// This channel cannot be opened!
return NS_ERROR_FAILURE;
}
NS_IMETHODIMP
nsPartChannel::AsyncOpen(nsIStreamListener *aListener, nsISupports *aContext)
{
// This channel cannot be opened!
return NS_ERROR_FAILURE;
}
NS_IMETHODIMP
nsPartChannel::GetLoadFlags(nsLoadFlags *aLoadFlags)
{
*aLoadFlags = mLoadFlags;
return NS_OK;
}
NS_IMETHODIMP
nsPartChannel::SetLoadFlags(nsLoadFlags aLoadFlags)
{
mLoadFlags = aLoadFlags;
return NS_OK;
}
NS_IMETHODIMP
nsPartChannel::GetLoadGroup(nsILoadGroup* *aLoadGroup)
{
*aLoadGroup = mLoadGroup;
NS_IF_ADDREF(*aLoadGroup);
return NS_OK;
}
NS_IMETHODIMP
nsPartChannel::SetLoadGroup(nsILoadGroup* aLoadGroup)
{
mLoadGroup = aLoadGroup;
return NS_OK;
}
NS_IMETHODIMP
nsPartChannel::GetOwner(nsISupports* *aOwner)
{
return mMultipartChannel->GetOwner(aOwner);
}
NS_IMETHODIMP
nsPartChannel::SetOwner(nsISupports* aOwner)
{
return mMultipartChannel->SetOwner(aOwner);
}
NS_IMETHODIMP
nsPartChannel::GetNotificationCallbacks(nsIInterfaceRequestor* *aCallbacks)
{
return mMultipartChannel->GetNotificationCallbacks(aCallbacks);
}
NS_IMETHODIMP
nsPartChannel::SetNotificationCallbacks(nsIInterfaceRequestor* aCallbacks)
{
return mMultipartChannel->SetNotificationCallbacks(aCallbacks);
}
NS_IMETHODIMP
nsPartChannel::GetSecurityInfo(nsISupports * *aSecurityInfo)
{
return mMultipartChannel->GetSecurityInfo(aSecurityInfo);
}
NS_IMETHODIMP
nsPartChannel::GetContentType(nsACString &aContentType)
{
aContentType = mContentType;
return NS_OK;
}
NS_IMETHODIMP
nsPartChannel::SetContentType(const nsACString &aContentType)
{
PRBool dummy;
net_ParseContentType(aContentType, mContentType, mContentCharset, &dummy);
return NS_OK;
}
NS_IMETHODIMP
nsPartChannel::GetContentCharset(nsACString &aContentCharset)
{
aContentCharset = mContentCharset;
return NS_OK;
}
NS_IMETHODIMP
nsPartChannel::SetContentCharset(const nsACString &aContentCharset)
{
mContentCharset = aContentCharset;
return NS_OK;
}
NS_IMETHODIMP
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nsPartChannel::GetContentLength(PRInt32 *aContentLength)
{
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*aContentLength = mContentLength; // XXX truncates 64-bit value
return NS_OK;
}
NS_IMETHODIMP
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nsPartChannel::SetContentLength(PRInt32 aContentLength)
{
mContentLength = aContentLength;
return NS_OK;
}
NS_IMETHODIMP
nsPartChannel::GetContentDisposition(nsACString &aContentDisposition)
{
aContentDisposition = mContentDisposition;
return NS_OK;
}
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NS_IMETHODIMP
nsPartChannel::SetContentDisposition(const nsACString &aContentDisposition)
{
mContentDisposition = aContentDisposition;
return NS_OK;
}
NS_IMETHODIMP
nsPartChannel::GetPartID(PRUint32 *aPartID)
{
*aPartID = mPartID;
return NS_OK;
}
NS_IMETHODIMP
nsPartChannel::GetIsLastPart(PRBool *aIsLastPart)
{
*aIsLastPart = mIsLastPart;
return NS_OK;
}
//
// nsIByteRangeRequest implementation...
//
NS_IMETHODIMP
nsPartChannel::GetIsByteRangeRequest(PRBool *aIsByteRangeRequest)
{
*aIsByteRangeRequest = mIsByteRangeRequest;
return NS_OK;
}
NS_IMETHODIMP
nsPartChannel::GetStartRange(PRInt64 *aStartRange)
{
*aStartRange = mByteRangeStart;
return NS_OK;
}
NS_IMETHODIMP
nsPartChannel::GetEndRange(PRInt64 *aEndRange)
{
*aEndRange = mByteRangeEnd;
return NS_OK;
}
NS_IMETHODIMP
nsPartChannel::GetBaseChannel(nsIChannel ** aReturn)
{
NS_ENSURE_ARG_POINTER(aReturn);
*aReturn = mMultipartChannel;
NS_IF_ADDREF(*aReturn);
return NS_OK;
}
// nsISupports implementation
NS_IMPL_ISUPPORTS3(nsMultiMixedConv,
nsIStreamConverter,
nsIStreamListener,
nsIRequestObserver)
// nsIStreamConverter implementation
// No syncronous conversion at this time.
NS_IMETHODIMP
nsMultiMixedConv::Convert(nsIInputStream *aFromStream,
const char *aFromType,
const char *aToType,
nsISupports *aCtxt, nsIInputStream **_retval) {
return NS_ERROR_NOT_IMPLEMENTED;
}
// Stream converter service calls this to initialize the actual stream converter (us).
NS_IMETHODIMP
nsMultiMixedConv::AsyncConvertData(const char *aFromType, const char *aToType,
nsIStreamListener *aListener, nsISupports *aCtxt) {
NS_ASSERTION(aListener && aFromType && aToType, "null pointer passed into multi mixed converter");
// hook up our final listener. this guy gets the various On*() calls we want to throw
// at him.
//
// WARNING: this listener must be able to handle multiple OnStartRequest, OnDataAvail()
// and OnStopRequest() call combinations. We call of series of these for each sub-part
// in the raw stream.
mFinalListener = aListener;
return NS_OK;
}
#define ERR_OUT { free(buffer); return rv; }
// nsIStreamListener implementation
NS_IMETHODIMP
nsMultiMixedConv::OnDataAvailable(nsIRequest *request, nsISupports *context,
nsIInputStream *inStr, PRUint32 sourceOffset, PRUint32 count) {
if (mToken.IsEmpty()) // no token, no love.
return NS_ERROR_FAILURE;
nsresult rv = NS_OK;
char *buffer = nsnull;
PRUint32 bufLen = 0, read = 0;
NS_ASSERTION(request, "multimixed converter needs a request");
nsCOMPtr<nsIChannel> channel = do_QueryInterface(request, &rv);
if (NS_FAILED(rv)) return rv;
// fill buffer
{
bufLen = count + mBufLen;
buffer = (char *) malloc(bufLen);
if (!buffer)
return NS_ERROR_OUT_OF_MEMORY;
if (mBufLen) {
// incorporate any buffered data into the parsing
memcpy(buffer, mBuffer, mBufLen);
free(mBuffer);
mBuffer = 0;
mBufLen = 0;
}
rv = inStr->Read(buffer + (bufLen - count), count, &read);
if (NS_FAILED(rv) || read == 0) return rv;
NS_ASSERTION(read == count, "poor data size assumption");
}
char *cursor = buffer;
if (mFirstOnData) {
// this is the first OnData() for this request. some servers
// don't bother sending a token in the first "part." This is
// illegal, but we'll handle the case anyway by shoving the
// boundary token in for the server.
mFirstOnData = PR_FALSE;
NS_ASSERTION(!mBufLen, "this is our first time through, we can't have buffered data");
const char * token = mToken.get();
PushOverLine(cursor, bufLen);
if (bufLen < mTokenLen+2) {
// we don't have enough data yet to make this comparison.
// skip this check, and try again the next time OnData()
// is called.
mFirstOnData = PR_TRUE;
}
else if (!PL_strnstr(cursor, token, mTokenLen+2)) {
buffer = (char *) realloc(buffer, bufLen + mTokenLen + 1);
if (!buffer)
return NS_ERROR_OUT_OF_MEMORY;
memmove(buffer + mTokenLen + 1, buffer, bufLen);
memcpy(buffer, token, mTokenLen);
buffer[mTokenLen] = '\n';
bufLen += (mTokenLen + 1);
// need to reset cursor to the buffer again (bug 100595)
cursor = buffer;
}
}
char *token = nsnull;
if (mProcessingHeaders) {
// we were not able to process all the headers
// for this "part" given the previous buffer given to
// us in the previous OnDataAvailable callback.
PRBool done = PR_FALSE;
rv = ParseHeaders(channel, cursor, bufLen, &done);
if (NS_FAILED(rv)) ERR_OUT
if (done) {
mProcessingHeaders = PR_FALSE;
rv = SendStart(channel);
if (NS_FAILED(rv)) ERR_OUT
}
}
PRInt32 tokenLinefeed = 1;
while ( (token = FindToken(cursor, bufLen)) ) {
if (*(token+mTokenLen+1) == '-') {
// This was the last delimiter so we can stop processing
rv = SendData(cursor, LengthToToken(cursor, token));
free(buffer);
if (NS_FAILED(rv)) return rv;
return SendStop(NS_OK);
}
if (!mNewPart && token > cursor) {
// headers are processed, we're pushing data now.
NS_ASSERTION(!mProcessingHeaders, "we should be pushing raw data");
rv = SendData(cursor, LengthToToken(cursor, token));
bufLen -= token - cursor;
if (NS_FAILED(rv)) ERR_OUT
}
// XXX else NS_ASSERTION(token == cursor, "?");
token += mTokenLen;
bufLen -= mTokenLen;
tokenLinefeed = PushOverLine(token, bufLen);
if (mNewPart) {
// parse headers
mNewPart = PR_FALSE;
cursor = token;
PRBool done = PR_FALSE;
rv = ParseHeaders(channel, cursor, bufLen, &done);
if (NS_FAILED(rv)) ERR_OUT
if (done) {
rv = SendStart(channel);
if (NS_FAILED(rv)) ERR_OUT
}
else {
// we haven't finished processing header info.
// we'll break out and try to process later.
mProcessingHeaders = PR_TRUE;
break;
}
}
else {
mNewPart = PR_TRUE;
// Reset state so we don't carry it over from part to part
mContentType.Truncate();
mContentLength = LL_MAXUINT;
mContentDisposition.Truncate();
mIsByteRangeRequest = PR_FALSE;
mByteRangeStart = 0;
mByteRangeEnd = 0;
rv = SendStop(NS_OK);
if (NS_FAILED(rv)) ERR_OUT
// reset the token to front. this allows us to treat
// the token as a starting token.
token -= mTokenLen + tokenLinefeed;
bufLen += mTokenLen + tokenLinefeed;
cursor = token;
}
}
// at this point, we want to buffer up whatever amount (bufLen)
// we have leftover. However, we *always* want to ensure that
// we buffer enough data to handle a broken token.
// carry over
PRUint32 bufAmt = 0;
if (mProcessingHeaders)
bufAmt = bufLen;
else if (bufLen) {
// if the data ends in a linefeed, and we're in the middle
// of a "part" (ie. mPartChannel exists) don't bother
// buffering, go ahead and send the data we have. Otherwise
// if we don't have a channel already, then we don't even
// have enough info to start a part, go ahead and buffer
// enough to collect a boundary token.
if (!mPartChannel || !(cursor[bufLen-1] == nsCRT::LF) )
bufAmt = PR_MIN(mTokenLen - 1, bufLen);
}
if (bufAmt) {
rv = BufferData(cursor + (bufLen - bufAmt), bufAmt);
if (NS_FAILED(rv)) ERR_OUT
bufLen -= bufAmt;
}
if (bufLen) {
rv = SendData(cursor, bufLen);
if (NS_FAILED(rv)) ERR_OUT
}
free(buffer);
return rv;
}
// nsIRequestObserver implementation
NS_IMETHODIMP
nsMultiMixedConv::OnStartRequest(nsIRequest *request, nsISupports *ctxt) {
// we're assuming the content-type is available at this stage
NS_ASSERTION(mToken.IsEmpty(), "a second on start???");
const char *bndry = nsnull;
nsCAutoString delimiter;
nsresult rv = NS_OK;
mContext = ctxt;
mFirstOnData = PR_TRUE;
mTotalSent = 0;
nsCOMPtr<nsIChannel> channel = do_QueryInterface(request, &rv);
if (NS_FAILED(rv)) return rv;
// ask the HTTP channel for the content-type and extract the boundary from it.
nsCOMPtr<nsIHttpChannel> httpChannel = do_QueryInterface(channel, &rv);
if (NS_SUCCEEDED(rv)) {
rv = httpChannel->GetResponseHeader(NS_LITERAL_CSTRING("content-type"), delimiter);
if (NS_FAILED(rv)) return rv;
} else {
// try asking the channel directly
rv = channel->GetContentType(delimiter);
if (NS_FAILED(rv)) return NS_ERROR_FAILURE;
}
bndry = strstr(delimiter.BeginWriting(), "boundary");
if (!bndry) return NS_ERROR_FAILURE;
bndry = strchr(bndry, '=');
if (!bndry) return NS_ERROR_FAILURE;
bndry++; // move past the equals sign
char *attrib = (char *) strchr(bndry, ';');
if (attrib) *attrib = '\0';
nsCAutoString boundaryString(bndry);
if (attrib) *attrib = ';';
boundaryString.Trim(" \"");
mToken = boundaryString;
mTokenLen = boundaryString.Length();
if (mTokenLen == 0)
return NS_ERROR_FAILURE;
return NS_OK;
}
NS_IMETHODIMP
nsMultiMixedConv::OnStopRequest(nsIRequest *request, nsISupports *ctxt,
nsresult aStatus) {
if (mToken.IsEmpty()) // no token, no love.
return NS_ERROR_FAILURE;
if (mPartChannel) {
mPartChannel->SetIsLastPart();
// we've already called SendStart() (which sets up the mPartChannel,
// and fires an OnStart()) send any data left over, and then fire the stop.
if (mBufLen > 0 && mBuffer) {
(void) SendData(mBuffer, mBufLen);
// don't bother checking the return value here, if the send failed
// we're done anyway as we're in the OnStop() callback.
free(mBuffer);
mBuffer = nsnull;
mBufLen = 0;
}
(void) SendStop(aStatus);
} else if (NS_FAILED(aStatus)) {
// underlying data production problem. we should not be in
// the middle of sending data. if we were, mPartChannel,
// above, would have been true.
// if we send the start, the URI Loader's m_targetStreamListener, may
// be pointing at us causing a nice stack overflow. So, don't call
// OnStartRequest! - This breaks necko's semantecs.
//(void) mFinalListener->OnStartRequest(request, ctxt);
(void) mFinalListener->OnStopRequest(request, ctxt, aStatus);
}
return NS_OK;
}
// nsMultiMixedConv methods
nsMultiMixedConv::nsMultiMixedConv() :
mCurrentPartID(0)
{
mTokenLen = 0;
mNewPart = PR_TRUE;
mContentLength = LL_MAXUINT;
mBuffer = nsnull;
mBufLen = 0;
mProcessingHeaders = PR_FALSE;
mByteRangeStart = 0;
mByteRangeEnd = 0;
mTotalSent = 0;
mIsByteRangeRequest = PR_FALSE;
}
nsMultiMixedConv::~nsMultiMixedConv() {
NS_ASSERTION(!mBuffer, "all buffered data should be gone");
if (mBuffer) {
free(mBuffer);
mBuffer = nsnull;
}
}
nsresult
nsMultiMixedConv::BufferData(char *aData, PRUint32 aLen) {
NS_ASSERTION(!mBuffer, "trying to over-write buffer");
char *buffer = (char *) malloc(aLen);
if (!buffer) return NS_ERROR_OUT_OF_MEMORY;
memcpy(buffer, aData, aLen);
mBuffer = buffer;
mBufLen = aLen;
return NS_OK;
}
nsresult
nsMultiMixedConv::SendStart(nsIChannel *aChannel) {
nsresult rv = NS_OK;
nsCOMPtr<nsIStreamListener> partListener(mFinalListener);
if (mContentType.IsEmpty()) {
mContentType.AssignLiteral(UNKNOWN_CONTENT_TYPE);
nsCOMPtr<nsIStreamConverterService> serv =
do_GetService(NS_STREAMCONVERTERSERVICE_CONTRACTID, &rv);
if (NS_SUCCEEDED(rv)) {
nsCOMPtr<nsIStreamListener> converter;
rv = serv->AsyncConvertData(UNKNOWN_CONTENT_TYPE,
"*/*",
mFinalListener,
mContext,
getter_AddRefs(converter));
if (NS_SUCCEEDED(rv)) {
partListener = converter;
}
}
}
// if we already have an mPartChannel, that means we never sent a Stop()
// before starting up another "part." that would be bad.
NS_ASSERTION(!mPartChannel, "tisk tisk, shouldn't be overwriting a channel");
nsPartChannel *newChannel;
newChannel = new nsPartChannel(aChannel, mCurrentPartID++, partListener);
if (!newChannel)
return NS_ERROR_OUT_OF_MEMORY;
if (mIsByteRangeRequest) {
newChannel->InitializeByteRange(mByteRangeStart, mByteRangeEnd);
}
mTotalSent = 0;
// Set up the new part channel...
mPartChannel = newChannel;
rv = mPartChannel->SetContentType(mContentType);
if (NS_FAILED(rv)) return rv;
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rv = mPartChannel->SetContentLength(mContentLength); // XXX Truncates 64-bit!
if (NS_FAILED(rv)) return rv;
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rv = mPartChannel->SetContentDisposition(mContentDisposition);
if (NS_FAILED(rv)) return rv;
nsLoadFlags loadFlags = 0;
mPartChannel->GetLoadFlags(&loadFlags);
loadFlags |= nsIChannel::LOAD_REPLACE;
mPartChannel->SetLoadFlags(loadFlags);
nsCOMPtr<nsILoadGroup> loadGroup;
(void)mPartChannel->GetLoadGroup(getter_AddRefs(loadGroup));
// Add the new channel to the load group (if any)
if (loadGroup) {
rv = loadGroup->AddRequest(mPartChannel, nsnull);
if (NS_FAILED(rv)) return rv;
}
// Let's start off the load. NOTE: we don't forward on the channel passed
// into our OnDataAvailable() as it's the root channel for the raw stream.
return mPartChannel->SendOnStartRequest(mContext);
}
nsresult
nsMultiMixedConv::SendStop(nsresult aStatus) {
nsresult rv = NS_OK;
if (mPartChannel) {
rv = mPartChannel->SendOnStopRequest(mContext, aStatus);
// don't check for failure here, we need to remove the channel from
// the loadgroup.
// Remove the channel from its load group (if any)
nsCOMPtr<nsILoadGroup> loadGroup;
(void) mPartChannel->GetLoadGroup(getter_AddRefs(loadGroup));
if (loadGroup)
(void) loadGroup->RemoveRequest(mPartChannel, mContext, aStatus);
}
mPartChannel = 0;
return rv;
}
nsresult
nsMultiMixedConv::SendData(char *aBuffer, PRUint32 aLen) {
nsresult rv = NS_OK;
if (!mPartChannel) return NS_ERROR_FAILURE; // something went wrong w/ processing
if (mContentLength != LL_MAXUINT) {
// make sure that we don't send more than the mContentLength
// XXX why? perhaps the Content-Length header was actually wrong!!
if ((PRUint64(aLen) + mTotalSent) > mContentLength)
aLen = mContentLength - mTotalSent;
if (aLen == 0)
return NS_OK;
}
PRUint32 offset = mTotalSent;
mTotalSent += aLen;
nsCOMPtr<nsIStringInputStream> ss(
do_CreateInstance("@mozilla.org/io/string-input-stream;1", &rv));
if (NS_FAILED(rv))
return rv;
rv = ss->ShareData(aBuffer, aLen);
if (NS_FAILED(rv))
return rv;
nsCOMPtr<nsIInputStream> inStream(do_QueryInterface(ss, &rv));
if (NS_FAILED(rv)) return rv;
return mPartChannel->SendOnDataAvailable(mContext, inStream, offset, aLen);
}
PRInt32
nsMultiMixedConv::PushOverLine(char *&aPtr, PRUint32 &aLen) {
PRInt32 chars = 0;
if ((aLen > 0) && (*aPtr == nsCRT::CR || *aPtr == nsCRT::LF)) {
if ((aLen > 1) && (aPtr[1] == nsCRT::LF))
chars++;
chars++;
aPtr += chars;
aLen -= chars;
}
return chars;
}
nsresult
nsMultiMixedConv::ParseHeaders(nsIChannel *aChannel, char *&aPtr,
PRUint32 &aLen, PRBool *_retval) {
// NOTE: this data must be ascii.
// NOTE: aPtr is NOT null terminated!
nsresult rv = NS_OK;
char *cursor = aPtr, *newLine = nsnull;
PRUint32 cursorLen = aLen;
PRBool done = PR_FALSE;
PRUint32 lineFeedIncrement = 1;
mContentLength = LL_MAXUINT; // XXX what if we were already called?
while (cursorLen && (newLine = (char *) memchr(cursor, nsCRT::LF, cursorLen))) {
// adjust for linefeeds
if ((newLine > cursor) && (newLine[-1] == nsCRT::CR) ) { // CRLF
lineFeedIncrement = 2;
newLine--;
}
else
lineFeedIncrement = 1; // reset
if (newLine == cursor) {
// move the newLine beyond the linefeed marker
NS_ASSERTION(cursorLen >= lineFeedIncrement, "oops!");
cursor += lineFeedIncrement;
cursorLen -= lineFeedIncrement;
done = PR_TRUE;
break;
}
char tmpChar = *newLine;
*newLine = '\0'; // cursor is now null terminated
char *colon = (char *) strchr(cursor, ':');
if (colon) {
*colon = '\0';
nsCAutoString headerStr(cursor);
headerStr.CompressWhitespace();
*colon = ':';
nsCAutoString headerVal(colon + 1);
headerVal.CompressWhitespace();
// examine header
if (headerStr.LowerCaseEqualsLiteral("content-type")) {
mContentType = headerVal;
} else if (headerStr.LowerCaseEqualsLiteral("content-length")) {
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mContentLength = atoi(headerVal.get()); // XXX 64-bit math?
} else if (headerStr.LowerCaseEqualsLiteral("content-disposition")) {
mContentDisposition = headerVal;
} else if (headerStr.LowerCaseEqualsLiteral("set-cookie")) {
nsCOMPtr<nsIHttpChannelInternal> httpInternal =
do_QueryInterface(aChannel);
if (httpInternal) {
httpInternal->SetCookie(headerVal.get());
}
} else if (headerStr.LowerCaseEqualsLiteral("content-range") ||
headerStr.LowerCaseEqualsLiteral("range") ) {
// something like: Content-range: bytes 7000-7999/8000
char* tmpPtr;
tmpPtr = (char *) strchr(colon + 1, '/');
if (tmpPtr)
*tmpPtr = '\0';
// pass the bytes-unit and the SP
char *range = (char *) strchr(colon + 2, ' ');
if (!range)
return NS_ERROR_FAILURE;
if (range[0] == '*'){
mByteRangeStart = mByteRangeEnd = 0;
}
else {
tmpPtr = (char *) strchr(range, '-');
if (!tmpPtr)
return NS_ERROR_FAILURE;
tmpPtr[0] = '\0';
mByteRangeStart = atoi(range); // XXX want 64-bit conv
tmpPtr++;
mByteRangeEnd = atoi(tmpPtr);
}
mIsByteRangeRequest = PR_TRUE;
if (mContentLength == LL_MAXUINT)
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mContentLength = PRUint64(PRInt64(mByteRangeEnd - mByteRangeStart + nsInt64(1)));
}
}
*newLine = tmpChar;
newLine += lineFeedIncrement;
cursorLen -= (newLine - cursor);
cursor = newLine;
}
aPtr = cursor;
aLen = cursorLen;
*_retval = done;
return rv;
}
char *
nsMultiMixedConv::FindToken(char *aCursor, PRUint32 aLen) {
// strnstr without looking for null termination
const char *token = mToken.get();
char *cur = aCursor;
if (!(token && aCursor && *token)) {
NS_WARNING("bad data");
return nsnull;
}
for (; aLen >= mTokenLen; aCursor++, aLen--) {
if (!memcmp(aCursor, token, mTokenLen) ) {
if ((aCursor - cur) >= 2) {
// back the cursor up over a double dash for backwards compat.
if ((*(aCursor-1) == '-') && (*(aCursor-2) == '-')) {
aCursor -= 2;
aLen += 2;
// we're playing w/ double dash tokens, adjust.
mToken.Assign(aCursor, mTokenLen + 2);
mTokenLen = mToken.Length();
}
}
return aCursor;
}
}
return nsnull;
}
nsresult
NS_NewMultiMixedConv(nsMultiMixedConv** aMultiMixedConv)
{
NS_PRECONDITION(aMultiMixedConv != nsnull, "null ptr");
if (! aMultiMixedConv)
return NS_ERROR_NULL_POINTER;
*aMultiMixedConv = new nsMultiMixedConv();
if (! *aMultiMixedConv)
return NS_ERROR_OUT_OF_MEMORY;
NS_ADDREF(*aMultiMixedConv);
return NS_OK;
}