X-Git-Url: https://code.citadel.org/?a=blobdiff_plain;f=libcitadel%2Flib%2Fstringbuf.c;h=9ebc2dd593616ef94b2c9f94cd46563e8d188c87;hb=5249c9ab6b14efd4d0f92cb64afd78bff3f7e163;hp=9bc1c8eb04aa9015ab7f5d62abdd50fe5b2d0175;hpb=3c0b1d8686c302e511389e2afbbbf436af2c56e9;p=citadel.git

diff --git a/libcitadel/lib/stringbuf.c b/libcitadel/lib/stringbuf.c
index 9bc1c8eb0..9ebc2dd59 100644
--- a/libcitadel/lib/stringbuf.c
+++ b/libcitadel/lib/stringbuf.c
@@ -32,6 +32,9 @@
 
 #include "libcitadel.h"
 
+#include "b64/cencode.h"
+#include "b64/cdecode.h"
+
 #ifdef HAVE_ICONV
 #include <iconv.h>
 #endif
@@ -51,6 +54,12 @@ int ZEXPORT compress_gzip(Bytef * dest, size_t * destLen,
 #endif
 int BaseStrBufSize = 64;
 int EnableSplice = 0;
+int ZLibCompressionRatio = -1; /* defaults to 6 */
+#ifdef HAVE_ZLIB
+#define DEF_MEM_LEVEL 8 /*< memlevel??? */
+#define OS_CODE 0x03	/*< unix */
+const int gz_magic[2] = { 0x1f, 0x8b };	/* gzip magic header */
+#endif
 
 const char *StrBufNOTNULL = ((char*) NULL) - 1;
 
@@ -1177,7 +1186,6 @@ void StrBufStripAllBut(StrBuf *Buf, char leftboundary, char rightboundary)
 	const char *pRight;
 
 	if ((Buf == NULL) || (Buf->buf == NULL)) {
-		StrBufCutAt(Buf, 0, Buf->buf);
 		return;
 	}
 
@@ -1185,19 +1193,11 @@ void StrBufStripAllBut(StrBuf *Buf, char leftboundary, char rightboundary)
 	if (pRight != NULL) {
 		StrBufCutAt(Buf, 0, pRight);
 	}
-	else {
-		StrBufCutAt(Buf, 0, Buf->buf);
-		return;
-	}
 
 	pLeft = strrchr(ChrPtr(Buf), leftboundary);
 	if (pLeft != NULL) {
 		StrBufCutLeft(Buf, pLeft - Buf->buf + 1);
 	}
-	else {
-		StrBufCutAt(Buf, 0, Buf->buf);
-		return;
-	}
 }
 
 
@@ -1934,6 +1934,129 @@ void StrBufUrlescUPAppend(StrBuf *OutBuf, const StrBuf *In, const char *PlainIn)
 	*pt = '\0';
 }
 
+/** 
+ * @ingroup StrBuf_DeEnCoder
+ * @brief append a string with characters having a special meaning in xml encoded to the buffer
+ * @param OutBuf the output buffer
+ * @param In Buffer to encode
+ * @param PlainIn way in from plain old c strings
+ * @param PlainInLen way in from plain old c strings; maybe you've got binary data or know the length?
+ * @param OverrideLowChars should chars < 0x20 be replaced by _ or escaped as xml entity?
+ */
+void StrBufXMLEscAppend(StrBuf *OutBuf,
+			const StrBuf *In,
+			const char *PlainIn,
+			long PlainInLen,
+			int OverrideLowChars)
+{
+	const char *pch, *pche;
+	char *pt, *pte;
+	int IsUtf8Sequence;
+	int len;
+
+	if (((In == NULL) && (PlainIn == NULL)) || (OutBuf == NULL) )
+		return;
+	if (PlainIn != NULL) {
+		if (PlainInLen < 0)
+			len = strlen((const char*)PlainIn);
+		else
+			len = PlainInLen;
+		pch = PlainIn;
+		pche = pch + len;
+	}
+	else {
+		pch = (const char*)In->buf;
+		pche = pch + In->BufUsed;
+		len = In->BufUsed;
+	}
+
+	if (len == 0)
+		return;
+
+	pt = OutBuf->buf + OutBuf->BufUsed;
+	/**< we max append 6 chars at once plus the \0 */
+	pte = OutBuf->buf + OutBuf->BufSize - 6;
+
+	while (pch < pche) {
+		if (pt >= pte) {
+			OutBuf->BufUsed = pt - OutBuf->buf;
+			IncreaseBuf(OutBuf, 1, -1);
+			pte = OutBuf->buf + OutBuf->BufSize - 6;
+			/**< we max append 3 chars at once plus the \0 */
+
+			pt = OutBuf->buf + OutBuf->BufUsed;
+		}
+
+		if (*pch == '<') {
+			memcpy(pt, HKEY("&lt;"));
+			pt += 4;
+			pch ++;
+		}
+		else if (*pch == '>') {
+			memcpy(pt, HKEY("&gt;"));
+			pt += 4;
+			pch ++;
+		}
+		else if (*pch == '&') {
+			memcpy(pt, HKEY("&amp;"));
+			pt += 5;
+			pch++;
+		}
+		else if ((*pch >= 0x20) && (*pch <= 0x7F)) {
+			*pt = *pch;
+			pt++; pch++;
+		}
+		else if (*pch < 0x20) {
+			/* we probably shouldn't be doing this */
+			if (OverrideLowChars)
+			{
+				*pt = '_';
+				pt ++;
+				pch ++;
+			}
+			else
+			{
+				*pt = '&';
+				pt++;
+				*pt = HexList[*(unsigned char*)pch][0];
+				pt ++;
+				*pt = HexList[*(unsigned char*)pch][1];
+				pt ++; pch ++;
+				*pt = '&';
+				pt++;
+				pch ++;
+			}
+		}
+		else {
+			IsUtf8Sequence =  Ctdl_GetUtf8SequenceLength(pch, pche);
+			if (IsUtf8Sequence)
+			{
+				while (IsUtf8Sequence > 0){
+					*pt = *pch;
+					pt ++;
+					pch ++;
+					--IsUtf8Sequence;
+				}
+			}
+			else
+			{
+				*pt = '&';
+				pt++;
+				*pt = HexList[*(unsigned char*)pch][0];
+				pt ++;
+				*pt = HexList[*(unsigned char*)pch][1];
+				pt ++; pch ++;
+				*pt = '&';
+				pt++;
+				pch ++;
+			}
+		}
+	}
+	*pt = '\0';
+	OutBuf->BufUsed = pt - OutBuf->buf;
+}
+
+
 /** 
  * @ingroup StrBuf_DeEnCoder
  * @brief append a string in hex encoding to the buffer
@@ -1985,6 +2108,45 @@ void StrBufHexEscAppend(StrBuf *OutBuf, const StrBuf *In, const unsigned char *P
 	*pt = '\0';
 }
 
+void StrBufBase64Append(StrBuf *OutBuf, const StrBuf *In, const char *PlainIn, long PlainInLen, int linebreaks)
+{
+	const char *pch;
+	char *pt;
+	int len;
+	long ExpectLen;
+	
+	if (((In == NULL) && (PlainIn == NULL)) || (OutBuf == NULL) )
+		return;
+	if (PlainIn != NULL) {
+		if (PlainInLen < 0)
+			len = strlen(PlainIn);
+		else
+			len = PlainInLen;
+		pch = PlainIn;
+	}
+	else {
+		pch = In->buf;
+		len = In->BufUsed;
+	}
+
+	if (len == 0) 
+		return;
+
+	ExpectLen = ((len * 134) / 100) + OutBuf->BufUsed;
+
+	if (ExpectLen > OutBuf->BufSize)
+		if (IncreaseBuf(OutBuf, 1, ExpectLen) < ExpectLen)
+			return;
+
+	pt = OutBuf->buf + OutBuf->BufUsed;
+
+	len = CtdlEncodeBase64(pt, pch, len, linebreaks);
+
+	pt += len;
+	OutBuf->BufUsed += len;
+	*pt = '\0';
+}
+
 /** 
  * @ingroup StrBuf_DeEnCoder
  * @brief append a string in hex encoding to the buffer
@@ -2667,9 +2829,319 @@ int StrBufDecodeBase64(StrBuf *Buf)
 	free(Buf->buf);
 	Buf->buf = xferbuf;
 	Buf->BufUsed = siz;
+
+	Buf->buf[Buf->BufUsed] = '\0';
 	return siz;
 }
 
+/**
+ * @ingroup StrBuf_DeEnCoder
+ * @brief decode a buffer from base 64 encoding; expects targetbuffer
+ * @param BufIn Buffor to transform
+ * @param BufOut Buffer to put result into
+ */
+int StrBufDecodeBase64To(const StrBuf *BufIn, StrBuf *BufOut)
+{
+	if ((BufIn == NULL) || (BufOut == NULL))
+		return -1;
+
+	if (BufOut->BufSize < BufIn->BufUsed)
+		IncreaseBuf(BufOut, BufIn->BufUsed, 0);
+
+	BufOut->BufUsed = CtdlDecodeBase64(BufOut->buf,
+					   BufIn->buf,
+					   BufIn->BufUsed);
+	return BufOut->BufUsed;
+}
+
+typedef struct __z_enc_stream {
+	StrBuf OutBuf;
+	z_stream zstream;
+} z_enc_stream;
+
+void *StrBufNewStreamContext(eStreamType type)
+{
+	base64_decodestate *state;;
+
+	switch (type)
+	{
+	case eBase64Decode:
+	case eBase64Encode:
+		state = (base64_decodestate*) malloc(sizeof(base64_decodestate));
+		base64_init_decodestate(state);
+		return state;
+		break;
+	case eZLibDecode:
+	{
+
+		z_enc_stream *stream;
+		int err;
+
+		stream = (z_enc_stream *) malloc(sizeof(z_enc_stream));
+		memset(stream, 0, sizeof(z_enc_stream));
+		stream->OutBuf.BufSize = 4*SIZ; /// TODO 64
+		stream->OutBuf.buf = (char*)malloc(stream->OutBuf.BufSize);
+
+		err = inflateInit(&stream->zstream);
+
+		if (err != Z_OK)
+			return NULL;/// tODO cleanup
+		return stream;
+
+	}
+	case eZLibEncode:
+	{
+		z_enc_stream *stream;
+		int err;
+
+		stream = (z_enc_stream *) malloc(sizeof(z_enc_stream));
+		memset(stream, 0, sizeof(z_enc_stream));
+		stream->OutBuf.BufSize = 4*SIZ; /// todo 64
+		stream->OutBuf.buf = (char*)malloc(stream->OutBuf.BufSize);
+		/* write gzip header */
+		stream->OutBuf.BufUsed = snprintf
+			(stream->OutBuf.buf,
+			 stream->OutBuf.BufSize, 
+			 "%c%c%c%c%c%c%c%c%c%c",
+			 gz_magic[0], gz_magic[1], Z_DEFLATED,
+			 0 /*flags */ , 0, 0, 0, 0 /*time */ , 0 /* xflags */ ,
+			 OS_CODE);
+
+		err = deflateInit2(&stream->zstream,
+				   ZLibCompressionRatio,
+				   Z_DEFLATED,
+				   -MAX_WBITS,
+				   DEF_MEM_LEVEL,
+				   Z_DEFAULT_STRATEGY);
+		if (err != Z_OK)
+			return NULL;/// tODO cleanup
+		return stream;
+	}
+	case eEmtyCodec:
+		/// TODO
+
+		break;
+	}
+	return NULL;
+}
+
+void StrBufDestroyStreamContext(eStreamType type, void **vStream)
+{
+	switch (type)
+	{
+	case eBase64Encode:
+	case eBase64Decode:
+		free(*vStream);
+		*vStream = NULL;
+		break;
+	case eZLibDecode:
+	{
+		z_enc_stream *stream = (z_enc_stream *)*vStream;
+		(void)inflateEnd(&stream->zstream);
+		free(stream->OutBuf.buf);
+		free(stream);
+	}
+	case eZLibEncode:
+	{
+		z_enc_stream *stream = (z_enc_stream *)*vStream;
+		free(stream->OutBuf.buf);
+		free(stream);
+// todo more?
+		*vStream = NULL;
+		break;
+	}
+	case eEmtyCodec: 
+		break; /// TODO
+	}
+}
+
+void StrBufStreamTranscode(eStreamType type, IOBuffer *Target, IOBuffer *In, const char* pIn, long pInLen, void *vStream, int LastChunk)
+{
+
+	switch (type)
+	{
+	case eBase64Encode:
+	{
+		/// TODO
+/*
+		// base64_decodestate *state = (base64_decodestate*)vStream;
+		long ExpectLen;
+		
+		if (In != NULL)
+		{
+			pIn = In->buf;
+			pInLen = In->BufUsed;
+		}
+		if ((In == NULL) || (vStream == NULL))
+			return;
+		
+		ExpectLen = (pInLen / 4) * 3;
+
+		if (Target->BufSize - Target->BufUsed < ExpectLen)
+		{
+			IncreaseBuf(Target, 1, Target->BufUsed + ExpectLen + 1);
+		}
+
+		////	ExpectLen = base64_encode_block(pIn, pInLen, Target->buf + Target->BufUsed, state);
+		Target->BufUsed += ExpectLen;
+		Target->buf[Target->BufUsed] = '\0';
+*/
+	}
+	break;
+	case eBase64Decode:
+	{
+/*
+		base64_decodestate *state = (base64_decodestate *)vStream;
+		long ExpectLen;
+		
+		if (In != NULL)
+		{
+			pIn = In->buf;
+			pInLen = In->BufUsed;
+		}
+		if ((pIn == NULL) || (vStream == NULL))
+			return;
+		
+		ExpectLen = (pInLen / 4) * 3;
+
+		if (Target->BufSize - Target->BufUsed < ExpectLen)
+		{
+			IncreaseBuf(Target, 1, Target->BufUsed + ExpectLen + 1);
+		}
+
+		ExpectLen = base64_decode_block(pIn, pInLen, Target->buf + Target->BufUsed, state);
+		Target->BufUsed += ExpectLen;
+		Target->buf[Target->BufUsed] = '\0';
+*/
+	}
+	break;
+	case eZLibEncode:
+	{
+		z_enc_stream *stream = (z_enc_stream *)vStream;
+		int org_outbuf_len = stream->zstream.total_out;
+		int err;
+		unsigned int chunkavail;
+
+		if (In->ReadWritePointer != NULL)
+		{
+			stream->zstream.next_in = (Bytef *) In->ReadWritePointer;
+			stream->zstream.avail_in = (uInt) In->Buf->BufUsed - 
+				(In->ReadWritePointer - In->Buf->buf);
+		}
+		else
+		{
+			stream->zstream.next_in = (Bytef *) In->Buf->buf;
+			stream->zstream.avail_in = (uInt) In->Buf->BufUsed;
+		}
+		
+		stream->zstream.next_out = (unsigned char*)stream->OutBuf.buf + stream->OutBuf.BufUsed;
+		stream->zstream.avail_out = chunkavail = (uInt) stream->OutBuf.BufSize - stream->OutBuf.BufUsed;
+
+		err = deflate(&stream->zstream,  (LastChunk) ? Z_FINISH : Z_NO_FLUSH);
+
+		stream->OutBuf.BufUsed += (chunkavail - stream->zstream.avail_out);
+		/// todo + org_outbuf_len;
+
+		if (Target) SwapBuffers(Target->Buf, &stream->OutBuf);
+
+		if (stream->zstream.avail_in == 0)
+		{
+			FlushStrBuf(In->Buf);
+			In->ReadWritePointer = NULL;
+		}
+		else
+		{
+			if (stream->zstream.avail_in < 64)
+			{
+				memmove(In->Buf->buf,
+					In->Buf->buf + In->Buf->BufUsed - stream->zstream.avail_in,
+					stream->zstream.avail_in);
+
+				In->Buf->BufUsed = stream->zstream.avail_in;
+				In->Buf->buf[In->Buf->BufUsed] = '\0';
+			}
+			else
+			{
+				
+				In->ReadWritePointer = In->Buf->buf + 
+					(In->Buf->BufUsed - stream->zstream.avail_in);
+			}
+		}
+
+	}
+	break;
+	case eZLibDecode: {
+		z_enc_stream *stream = (z_enc_stream *)vStream;
+		int org_outbuf_len = stream->zstream.total_out;
+		int err;
+
+		if ((stream->zstream.avail_out != 0) && (stream->zstream.next_in != NULL)) {
+			if (In->ReadWritePointer != NULL)
+			{
+				stream->zstream.next_in = (Bytef *) In->ReadWritePointer;
+				stream->zstream.avail_in = (uInt) In->Buf->BufUsed - 
+					(In->ReadWritePointer - In->Buf->buf);
+			}
+			else
+			{
+				stream->zstream.next_in = (Bytef *) In->Buf->buf;
+				stream->zstream.avail_in = (uInt) In->Buf->BufUsed;
+			}
+		}
+
+		stream->zstream.next_out = (unsigned char*)stream->OutBuf.buf + stream->OutBuf.BufUsed;
+		stream->zstream.avail_out = (uInt) stream->OutBuf.BufSize - stream->OutBuf.BufUsed;
+
+		err = inflate(&stream->zstream, Z_NO_FLUSH);
+
+		///assert(ret != Z_STREAM_ERROR);  /* state not clobbered * /
+		switch (err) {
+		case Z_NEED_DICT:
+			err = Z_DATA_ERROR;     /* and fall through */
+
+		case Z_DATA_ERROR:
+			fprintf(stderr, "sanoteuh\n");
+		case Z_MEM_ERROR:
+			(void)inflateEnd(&stream->zstream);
+			return err;
+		}
+
+		stream->OutBuf.BufUsed += stream->zstream.total_out + org_outbuf_len;
+
+		if (Target) SwapBuffers(Target->Buf, &stream->OutBuf);
+
+		if (stream->zstream.avail_in == 0)
+		{
+			FlushStrBuf(In->Buf);
+			In->ReadWritePointer = NULL;
+		}
+		else
+		{
+			if (stream->zstream.avail_in < 64)
+			{
+				memmove(In->Buf->buf,
+					In->Buf->buf + In->Buf->BufUsed - stream->zstream.avail_in,
+					stream->zstream.avail_in);
+
+				In->Buf->BufUsed = stream->zstream.avail_in;
+				In->Buf->buf[In->Buf->BufUsed] = '\0';
+			}
+			else
+			{
+				
+				In->ReadWritePointer = In->Buf->buf + 
+					(In->Buf->BufUsed - stream->zstream.avail_in);
+			}
+		}
+	}
+		break;
+	case eEmtyCodec: {
+
+	}
+		break; /// TODO
+	}
+}
+
 /**
  * @ingroup StrBuf_DeEnCoder
  * @brief decode a buffer from base 64 encoding; destroys original
@@ -2824,7 +3296,6 @@ int StrBufRFC2047encode(StrBuf **target, const StrBuf *source)
 		ch = (unsigned char) source->buf[i];
 		if ((ch  <  32) || 
 		    (ch  > 126) || 
-		    (ch ==  61) ||
 		    (ch == '=') ||
                     (ch == '?') ||
 		    (ch == '_') ||
@@ -2852,6 +3323,95 @@ int StrBufRFC2047encode(StrBuf **target, const StrBuf *source)
 	return (*target)->BufUsed;;
 }
 
+/**
+ * @ingroup StrBuf_DeEnCoder
+ * @brief	Quoted-Printable encode a message; make it < 80 columns width.
+ * @param	source		Source string to be encoded.
+ * @returns     buffer with encoded message.
+ */
+StrBuf *StrBufRFC2047encodeMessage(const StrBuf *EncodeMe)
+{
+	StrBuf *OutBuf;
+	char *Optr, *OEptr;
+	const char *ptr, *eptr;
+	unsigned char ch;
+	int LinePos;
+
+	OutBuf = NewStrBufPlain(NULL, StrLength(EncodeMe) * 4);
+	Optr = OutBuf->buf;
+	OEptr = OutBuf->buf + OutBuf->BufSize;
+	ptr = EncodeMe->buf;
+	eptr = EncodeMe->buf + EncodeMe->BufUsed;
+	LinePos = 0;
+
+	while (ptr < eptr)
+	{
+		if (Optr + 4 >= OEptr)
+		{
+			long Offset;
+			Offset = Optr - OutBuf->buf;
+			OutBuf->BufUsed = Optr - OutBuf->buf;
+			IncreaseBuf(OutBuf, 1, 0);
+			Optr = OutBuf->buf + Offset;
+			OEptr = OutBuf->buf + OutBuf->BufSize;
+		}
+		if (*ptr == '\r')
+		{
+			/* ignore carriage returns */
+			ptr ++;
+		}
+		else if (*ptr == '\n') {
+			/* hard line break */
+			memcpy(Optr, HKEY("=0A"));
+			Optr += 3;
+			LinePos += 3;
+			ptr ++;
+		}
+		else if (( (*ptr >= 32) && (*ptr <= 60) ) ||
+			 ( (*ptr >= 62) && (*ptr <= 126) ))
+		{
+			*Optr = *ptr;
+			Optr ++;
+			ptr ++;
+			LinePos ++;
+		}
+		else {
+			ch = *ptr;
+			*Optr = '=';
+			Optr ++;
+			*Optr = HexList[ch][0];
+			Optr ++;
+			*Optr = HexList[ch][1];
+			Optr ++;
+			LinePos += 3;
+			ptr ++;
+		}
+
+		if (LinePos > 72) {
+			/* soft line break */
+			if (isspace(*(Optr - 1))) {
+				ch = *(Optr - 1);
+				Optr --;
+				*Optr = '=';
+				Optr ++;
+				*Optr = HexList[ch][0];
+				Optr ++;
+				*Optr = HexList[ch][1];
+				Optr ++;
+				LinePos += 3;
+			}
+			*Optr = '=';
+			Optr ++;
+			*Optr = '\n';
+			Optr ++;
+			LinePos = 0;
+		}
+	}
+	*Optr = '\0';
+	OutBuf->BufUsed = Optr - OutBuf->buf;
+
+	return OutBuf;
+}
 
 
 static void AddRecipient(StrBuf *Target, 
@@ -3583,10 +4143,6 @@ long StrBuf_Utf8StrCut(StrBuf *Buf, int maxlen)
  *                               wrapping ZLib                                 *
  *******************************************************************************/
 
-#ifdef HAVE_ZLIB
-#define DEF_MEM_LEVEL 8 /*< memlevel??? */
-#define OS_CODE 0x03	/*< unix */
-
 /**
  * @ingroup StrBuf_DeEnCoder
  * @brief uses the same calling syntax as compress2(), but it
@@ -3597,14 +4153,13 @@ long StrBuf_Utf8StrCut(StrBuf *Buf, int maxlen)
  * @param sourceLen length of source to encode 
  * @param level compression level
  */
+#ifdef HAVE_ZLIB
 int ZEXPORT compress_gzip(Bytef * dest,
 			  size_t * destLen,
 			  const Bytef * source,
 			  uLong sourceLen,     
 			  int level)
 {
-	const int gz_magic[2] = { 0x1f, 0x8b };	/* gzip magic header */
-
 	/* write gzip header */
 	snprintf((char *) dest, *destLen, 
 		 "%c%c%c%c%c%c%c%c%c%c",
@@ -3934,18 +4489,34 @@ long IOBufferStrLength(IOBuffer *FB)
 	return StrLength(FB->Buf) - (FB->ReadWritePointer - FB->Buf->buf);
 }
 
-void FDIOBufferInit(FDIOBuffer *FDB, IOBuffer *IO, int FD, long TotalSendSize)
+inline static void FDIOBufferFlush(FDIOBuffer *FDB)
 {
 	memset(FDB, 0, sizeof(FDIOBuffer));
-	FDB->ChunkSize = 
-		FDB->TotalSendSize = TotalSendSize;
+	FDB->OtherFD = -1;
+	FDB->SplicePipe[0] = -1;
+	FDB->SplicePipe[1] = -1;
+}
+
+void FDIOBufferInit(FDIOBuffer *FDB, IOBuffer *IO, int FD, long TotalSendSize)
+{
+	FDIOBufferFlush(FDB);
+
+	FDB->TotalSendSize = TotalSendSize;
+	if (TotalSendSize > 0)
+		FDB->ChunkSize = TotalSendSize;
+	else
+	{
+		TotalSendSize = SIZ * 10;
+		FDB->ChunkSize = TotalSendSize;
+	}
 	FDB->IOB = IO;
+
 #ifdef LINUX_SPLICE
 	if (EnableSplice)
 		pipe(FDB->SplicePipe);
 	else
 #endif
-		FDB->ChunkBuffer = NewStrBufPlain(NULL, TotalSendSize + 1);
+		FDB->ChunkBuffer = NewStrBufPlain(NULL, TotalSendSize+ 1);
 
 	FDB->OtherFD = FD;
 }
@@ -3966,74 +4537,165 @@ void FDIOBufferDelete(FDIOBuffer *FDB)
 	
 	if (FDB->OtherFD > 0)
 		close(FDB->OtherFD);
-	memset(FDB, 0, sizeof(FDIOBuffer));	
+	FDIOBufferFlush(FDB);
 }
 
 int FileSendChunked(FDIOBuffer *FDB, const char **Err)
 {
 	ssize_t sent, pipesize;
-#ifdef LINUX_SPLICE
-	if (EnableSplice)
+
+	if (FDB->TotalSendSize > 0)
 	{
-		if (FDB->PipeSize == 0)
+#ifdef LINUX_SPLICE
+		if (EnableSplice)
 		{
-			pipesize = splice(FDB->OtherFD,
-					  &FDB->TotalSentAlready, 
-					  FDB->SplicePipe[1],
-					  NULL, 
-					  FDB->ChunkSendRemain, 
-					  SPLICE_F_MOVE);
+			if (FDB->PipeSize == 0)
+			{
+				pipesize = splice(FDB->OtherFD,
+						  &FDB->TotalSentAlready, 
+						  FDB->SplicePipe[1],
+						  NULL, 
+						  FDB->ChunkSendRemain, 
+						  SPLICE_F_MOVE);
 	
-			if (pipesize == -1)
+				if (pipesize == -1)
+				{
+					*Err = strerror(errno);
+					return pipesize;
+				}
+				FDB->PipeSize = pipesize;
+			}
+			sent =  splice(FDB->SplicePipe[0],
+				       NULL, 
+				       FDB->IOB->fd,
+				       NULL, 
+				       FDB->PipeSize,
+				       SPLICE_F_MORE | SPLICE_F_MOVE | SPLICE_F_NONBLOCK);
+			if (sent == -1)
 			{
 				*Err = strerror(errno);
-				return pipesize;
+				return sent;
 			}
-			FDB->PipeSize = pipesize;
+			FDB->PipeSize -= sent;
+			FDB->ChunkSendRemain -= sent;
+			return sent;
 		}
-		sent =  splice(FDB->SplicePipe[0],
-			       NULL, 
-			       FDB->IOB->fd,
-			       NULL, 
-			       FDB->PipeSize,
-			       SPLICE_F_MORE | SPLICE_F_MOVE | SPLICE_F_NONBLOCK);
-		if (sent == -1)
+		else
+#endif
 		{
-			*Err = strerror(errno);
-			return sent;
+			char *pRead;
+			long nRead = 0;
+
+			pRead = FDB->ChunkBuffer->buf;
+			while ((FDB->ChunkBuffer->BufUsed < FDB->TotalSendSize) && (nRead >= 0))
+			{
+				nRead = read(FDB->OtherFD, pRead, FDB->TotalSendSize - FDB->ChunkBuffer->BufUsed);
+				if (nRead > 0) {
+					FDB->ChunkBuffer->BufUsed += nRead;
+					FDB->ChunkBuffer->buf[FDB->ChunkBuffer->BufUsed] = '\0';
+				}
+				else if (nRead == 0) {}
+				else return nRead;
+			}
+
+			nRead = write(FDB->IOB->fd,
+				      FDB->ChunkBuffer->buf     + FDB->TotalSentAlready,
+				      FDB->ChunkBuffer->BufUsed - FDB->TotalSentAlready);
+
+			if (nRead >= 0) {
+				FDB->TotalSentAlready += nRead;
+				FDB->ChunkSendRemain -= nRead;
+				return FDB->ChunkSendRemain;
+			}
+			else {
+				return nRead;
+			}
 		}
-		FDB->PipeSize -= sent;
-		FDB->ChunkSendRemain -= sent;
-		return sent;
 	}
 	else
-#endif
 	{
-		char *pRead;
-		long nRead = 0;
-
-		pRead = FDB->ChunkBuffer->buf;
-		while ((FDB->ChunkBuffer->BufUsed < FDB->TotalSendSize) && (nRead >= 0))
+#ifdef LINUX_SPLICE
+		if (EnableSplice)
 		{
-			nRead = read(FDB->OtherFD, pRead, FDB->TotalSendSize - FDB->ChunkBuffer->BufUsed);
-			if (nRead > 0) {
-				FDB->ChunkBuffer->BufUsed += nRead;
-				FDB->ChunkBuffer->buf[FDB->ChunkBuffer->BufUsed] = '\0';
+			if (FDB->PipeSize == 0)
+			{
+				pipesize = splice(FDB->OtherFD,
+						  &FDB->TotalSentAlready, 
+						  FDB->SplicePipe[1],
+						  NULL, 
+						  SIZ * 10, 
+						  SPLICE_F_MOVE);
+	
+				if (pipesize == -1)
+				{
+					*Err = strerror(errno);
+					return pipesize;
+				}
+				FDB->PipeSize = pipesize;
+				if (pipesize == 0)
+					return -1;
 			}
-			else if (nRead == 0) {}
-			else return nRead;
-		
+			sent =  splice(FDB->SplicePipe[0],
+				       NULL, 
+				       FDB->IOB->fd,
+				       NULL, 
+				       FDB->PipeSize,
+				       SPLICE_F_MORE | SPLICE_F_MOVE | SPLICE_F_NONBLOCK);
+			if (sent == -1)
+			{
+				*Err = strerror(errno);
+				return sent;
+			}
+			FDB->PipeSize -= sent;
+			FDB->ChunkSendRemain -= sent;
+			return sent;
 		}
+		else
+#endif
+		{
+			char *pRead;
+			long nRead = 0;
+
+			pRead = FDB->ChunkBuffer->buf;
+			while ((FDB->ChunkSendRemain == 0) && 
+			       (FDB->ChunkBuffer->BufUsed < FDB->ChunkBuffer->BufSize) &&
+			       (nRead >= 0))
+			{
+				FDB->TotalSentAlready = 0;
+				nRead = read(FDB->OtherFD, pRead, FDB->ChunkBuffer->BufSize - FDB->ChunkBuffer->BufUsed);
+				if (nRead > 0) {
+					FDB->ChunkBuffer->BufUsed += nRead;
+					FDB->ChunkBuffer->buf[FDB->ChunkBuffer->BufUsed] = '\0';
+					FDB->ChunkSendRemain += nRead;
+				}
+				else if (nRead == 0)
+				{
+					return -1;
+				}
+				else
+				{
+					*Err = strerror(errno);
+					return nRead;
+				}
+			}
 
-		nRead = write(FDB->IOB->fd, FDB->ChunkBuffer->buf + FDB->TotalSentAlready, FDB->ChunkSendRemain);
+			nRead = write(FDB->IOB->fd,
+				      FDB->ChunkBuffer->buf     + FDB->TotalSentAlready,
+				      FDB->ChunkBuffer->BufUsed - FDB->TotalSentAlready);
 
-		if (nRead >= 0) {
-			FDB->TotalSentAlready += nRead;
-			FDB->ChunkSendRemain -= nRead;
-			return FDB->ChunkSendRemain;
-		}
-		else {
-			return nRead;
+			if (nRead >= 0) {
+				FDB->TotalSentAlready += nRead;
+				FDB->ChunkSendRemain -= nRead;
+				if (FDB->ChunkSendRemain == 0)
+				{
+					FDB->ChunkBuffer->BufUsed = 0;
+					FDB->TotalSentAlready = 0;
+				}
+				return FDB->ChunkSendRemain;
+			}
+			else {
+				return nRead;
+			}
 		}
 	}
 }