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// Copyright 2016 Yahoo Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
/**
*******************************************************************************
*
* @author Markus Bjartveit Kr�ger
* @date Creation date: 2001-11-21
* @version $Id$
*
* @file
*
* HTTP chunked output stream.
*
* Copyright (c) : 2001 Fast Search & Transfer ASA
* ALL RIGHTS RESERVED
*
******************************************************************************/
#include <vespa/fastos/fastos.h>
#include <string.h>
#include <vespa/fastlib/net/httpchunkedoutputstream.h>
Fast_HTTPChunkedOutputStream::Fast_HTTPChunkedOutputStream(Fast_OutputStream &out,
size_t chunkSize)
: Fast_FilterOutputStream(out),
_chunkSize(chunkSize),
_buffer(NULL),
_bufferUsed(0),
_writeHasFailed(false)
{
_buffer = new char[_chunkSize+2]; // Leave room for CRLF at end of chunk
assert(_buffer != NULL);
}
Fast_HTTPChunkedOutputStream::~Fast_HTTPChunkedOutputStream(void)
{
delete [] _buffer;
}
bool Fast_HTTPChunkedOutputStream::WriteChunk(void)
{
// Don't write an empty block, as this will end the entity.
if (_bufferUsed == 0)
{
return true;
}
if (_writeHasFailed)
return false;
char chunkHeader[100];
char *from;
size_t bytesLeft;
ssize_t bytesWritten;
bytesLeft = sprintf(chunkHeader, "%x\r\n",
static_cast<unsigned int>(_bufferUsed));
from = chunkHeader;
while (bytesLeft > 0)
{
bytesWritten = Fast_FilterOutputStream::Write(from, bytesLeft);
if (bytesWritten < 0)
{
_writeHasFailed = true;
return false;
}
else
{
from += bytesWritten;
bytesLeft -= bytesWritten;
}
}
_buffer[_bufferUsed++] = '\r';
_buffer[_bufferUsed++] = '\n';
bytesLeft = _bufferUsed;
from = _buffer;
while (bytesLeft > 0)
{
bytesWritten = Fast_FilterOutputStream::Write(from, bytesLeft);
if (bytesWritten < 0)
{
_bufferUsed -= 2;
_writeHasFailed = true;
return false;
}
else
{
from += bytesWritten;
bytesLeft -= bytesWritten;
}
}
_bufferUsed = 0;
return true;
}
bool Fast_HTTPChunkedOutputStream::Close(void)
{
WriteChunk();
char chunkHeader[] = { '0', '\r', '\n', '\r', '\n' };
char *from = chunkHeader;
size_t bytesLeft = sizeof(chunkHeader);
ssize_t bytesWritten;
while (bytesLeft > 0)
{
bytesWritten = Fast_FilterOutputStream::Write(from, bytesLeft);
if (bytesWritten < 0)
{
break;
}
else
{
from += bytesWritten;
bytesLeft -= bytesWritten;
}
}
return (bytesLeft == 0);
}
ssize_t
Fast_HTTPChunkedOutputStream::Write(const void *sourceBuffer, size_t length)
{
const char *from = static_cast<const char*>(sourceBuffer);
size_t numBytesWritten = length;
while (length > 0)
{
size_t bufferRemain = _chunkSize - _bufferUsed;
if (bufferRemain > 0) {
size_t blockLength = (length < bufferRemain) ? length : bufferRemain;
memcpy(_buffer + _bufferUsed, from, blockLength);
_bufferUsed += blockLength;
from += blockLength;
length -= blockLength;
}
if (length > 0)
{
if (!WriteChunk())
{
return -1;
}
}
}
return numBytesWritten;
}
void
Fast_HTTPChunkedOutputStream::Flush(void)
{
WriteChunk();
Fast_FilterOutputStream::Flush();
}
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