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Added extension "deflate-frame".

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Using by default instead of "deflate-stream".
This commit is contained in:
David Galeano 2013-01-09 18:21:33 +08:00 • committed by Andy Green
parent e2cf992571
commit 85a092135e
6 changed files with 598 additions and 346 deletions
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1
lib/Makefile.am
View file

@ -8,6 +8,7 @@ dist_libwebsockets_la_SOURCES=libwebsockets.c \
client-handshake.c \
extension.c \
extension-deflate-stream.c extension-deflate-stream.h \
extension-deflate-frame.c extension-deflate-frame.h\
private-libwebsockets.h

205
lib/extension-deflate-frame.c Normal file
View file

@ -0,0 +1,205 @@
#include "private-libwebsockets.h"
#include "extension-deflate-frame.h"
#include <stdio.h>
#include <string.h>
#include <assert.h>
#define LWS_ZLIB_WINDOW_BITS 15
#define LWS_ZLIB_MEMLEVEL 8
int lws_extension_callback_deflate_frame(
struct libwebsocket_context *context,
struct libwebsocket_extension *ext,
struct libwebsocket *wsi,
enum libwebsocket_extension_callback_reasons reason,
void *user, void *in, size_t len)
{
struct lws_ext_deflate_frame_conn *conn =
(struct lws_ext_deflate_frame_conn *)user;
struct lws_tokens *eff_buf = (struct lws_tokens *)in;
int n;
switch (reason) {
/*
* for deflate-frame, both client and server sides act the same
*/
case LWS_EXT_CALLBACK_CLIENT_CONSTRUCT:
case LWS_EXT_CALLBACK_CONSTRUCT:
conn->zs_in.zalloc = conn->zs_out.zalloc = Z_NULL;
conn->zs_in.zfree = conn->zs_out.zfree = Z_NULL;
conn->zs_in.opaque = conn->zs_out.opaque = Z_NULL;
n = inflateInit2(&conn->zs_in, -LWS_ZLIB_WINDOW_BITS);
if (n != Z_OK) {
lws_log(LWS_LOG_WARNING, "deflateInit returned %d", n);
return 1;
}
n = deflateInit2(&conn->zs_out,
DEFLATE_FRAME_COMPRESSION_LEVEL, Z_DEFLATED,
-LWS_ZLIB_WINDOW_BITS, LWS_ZLIB_MEMLEVEL,
Z_DEFAULT_STRATEGY);
if (n != Z_OK) {
lws_log(LWS_LOG_WARNING, "deflateInit returned %d", n);
return 1;
}
conn->buf_in_length = MAX_USER_RX_BUFFER;
conn->buf_out_length = MAX_USER_RX_BUFFER;
conn->compressed_out = 0;
conn->buf_in = (unsigned char *)malloc(LWS_SEND_BUFFER_PRE_PADDING +
conn->buf_in_length +
LWS_SEND_BUFFER_POST_PADDING);
conn->buf_out = (unsigned char *)malloc(LWS_SEND_BUFFER_PRE_PADDING +
conn->buf_out_length +
LWS_SEND_BUFFER_POST_PADDING);
lws_log(LWS_LOG_DEBUG, "zlibs constructed");
break;
case LWS_EXT_CALLBACK_DESTROY:
free(conn->buf_in);
free(conn->buf_out);
conn->buf_in_length = 0;
conn->buf_out_length = 0;
conn->compressed_out = 0;
(void)inflateEnd(&conn->zs_in);
(void)deflateEnd(&conn->zs_out);
lws_log(LWS_LOG_DEBUG, "zlibs destructed");
break;
case LWS_EXT_CALLBACK_PAYLOAD_RX:
if ((libwebsocket_get_reserved_bits(wsi) & 0x40) == 0)
return 0;
/*
* inflate the incoming payload
*/
conn->zs_in.next_in = (unsigned char *)eff_buf->token;
conn->zs_in.avail_in = eff_buf->token_len;
conn->zs_in.next_in[eff_buf->token_len + 0] = 0;
conn->zs_in.next_in[eff_buf->token_len + 1] = 0;
conn->zs_in.next_in[eff_buf->token_len + 2] = 0xff;
conn->zs_in.next_in[eff_buf->token_len + 3] = 0xff;
conn->zs_in.avail_in += 4;
conn->zs_in.next_out = conn->buf_in + LWS_SEND_BUFFER_PRE_PADDING;
conn->zs_in.avail_out = conn->buf_in_length;
while (1)
{
n = inflate(&conn->zs_in, Z_SYNC_FLUSH);
switch (n) {
case Z_NEED_DICT:
case Z_DATA_ERROR:
case Z_MEM_ERROR:
/*
* screwed.. close the connection... we will get a
* destroy callback to take care of closing nicely
*/
lws_log(LWS_LOG_ERROR, "zlib error inflate %d: %s", n, conn->zs_in.msg);
return -1;
}
if (conn->zs_in.avail_in > 0)
{
size_t len_so_far = (conn->zs_in.next_out - (conn->buf_in + LWS_SEND_BUFFER_PRE_PADDING));
unsigned char *new_buf;
conn->buf_in_length *= 2;
new_buf = (unsigned char *)malloc(LWS_SEND_BUFFER_PRE_PADDING +
conn->buf_in_length +
LWS_SEND_BUFFER_POST_PADDING);
memcpy(new_buf + LWS_SEND_BUFFER_PRE_PADDING,
conn->buf_in + LWS_SEND_BUFFER_PRE_PADDING,
len_so_far);
free(conn->buf_in);
conn->buf_in = new_buf;
conn->zs_in.next_out = (new_buf + LWS_SEND_BUFFER_PRE_PADDING + len_so_far);
conn->zs_in.avail_out = (conn->buf_in_length - len_so_far);
}
else
{
break;
}
}
/* rewrite the buffer pointers and length */
eff_buf->token = (char *)(conn->buf_in + LWS_SEND_BUFFER_PRE_PADDING);
eff_buf->token_len = (int)(conn->zs_in.next_out - (conn->buf_in + LWS_SEND_BUFFER_PRE_PADDING));
return 0;
case LWS_EXT_CALLBACK_PAYLOAD_TX:
/*
* deflate the outgoing payload
*/
conn->zs_out.next_in = (unsigned char *)eff_buf->token;
conn->zs_out.avail_in = eff_buf->token_len;
conn->zs_out.next_out = conn->buf_out + LWS_SEND_BUFFER_PRE_PADDING;
conn->zs_out.avail_out = conn->buf_out_length;
while (1)
{
n = deflate(&conn->zs_out, Z_SYNC_FLUSH);
if (n == Z_STREAM_ERROR) {
/*
* screwed.. close the connection... we will get a
* destroy callback to take care of closing nicely
*/
lws_log(LWS_LOG_ERROR, "zlib error deflate");
return -1;
}
if (conn->zs_out.avail_in > 0)
{
size_t len_so_far = (conn->zs_out.next_out - (conn->buf_out + LWS_SEND_BUFFER_PRE_PADDING));
unsigned char *new_buf;
conn->buf_out_length *= 2;
new_buf = (unsigned char *)malloc(LWS_SEND_BUFFER_PRE_PADDING +
conn->buf_out_length +
LWS_SEND_BUFFER_POST_PADDING);
memcpy(new_buf + LWS_SEND_BUFFER_PRE_PADDING,
conn->buf_out + LWS_SEND_BUFFER_PRE_PADDING,
len_so_far);
free(conn->buf_out);
conn->buf_out = new_buf;
conn->zs_out.next_out = (new_buf + LWS_SEND_BUFFER_PRE_PADDING + len_so_far);
conn->zs_out.avail_out = (conn->buf_out_length - len_so_far);
}
else
{
break;
}
}
conn->compressed_out = 1;
/* rewrite the buffer pointers and length */
eff_buf->token = (char *)(conn->buf_out + LWS_SEND_BUFFER_PRE_PADDING);
eff_buf->token_len = (int)(conn->zs_out.next_out - (conn->buf_out + LWS_SEND_BUFFER_PRE_PADDING)) - 4;
return 0;
case LWS_EXT_CALLBACK_PACKET_TX_PRESEND:
if (conn->compressed_out)
{
conn->compressed_out = 0;
*((unsigned char *)eff_buf->token) |= 0x40;
}
break;
case LWS_EXT_CALLBACK_CHECK_OK_TO_PROPOSE_EXTENSION:
/* Avoid x-webkit-deflate-frame extension on client */
if (strcmp((char *)in, "x-webkit-deflate-frame") == 0)
{
return 1;
}
break;
default:
break;
}
return 0;
}

21
lib/extension-deflate-frame.h Normal file
View file

@ -0,0 +1,21 @@
#include <zlib.h>
#define DEFLATE_FRAME_COMPRESSION_LEVEL 1
struct lws_ext_deflate_frame_conn {
z_stream zs_in;
z_stream zs_out;
int buf_in_length;
int buf_out_length;
int compressed_out;
unsigned char *buf_in;
unsigned char *buf_out;
};
extern int lws_extension_callback_deflate_frame(
struct libwebsocket_context *context,
struct libwebsocket_extension *ext,
struct libwebsocket *wsi,
enum libwebsocket_extension_callback_reasons reason,
void *user, void *in, size_t len);

14
lib/extension.c
View file

@ -1,5 +1,6 @@
#include "private-libwebsockets.h"
#include "extension-deflate-frame.h"
#include "extension-deflate-stream.h"
#include "extension-x-google-mux.h"
@ -11,11 +12,24 @@ struct libwebsocket_extension libwebsocket_internal_extensions[] = {
sizeof (struct lws_ext_x_google_mux_conn)
},
#endif
#ifdef LWS_EXT_DEFLATE_STREAM
{
"deflate-stream",
lws_extension_callback_deflate_stream,
sizeof (struct lws_ext_deflate_stream_conn)
},
#else
{
"x-webkit-deflate-frame",
lws_extension_callback_deflate_frame,
sizeof (struct lws_ext_deflate_frame_conn)
},
{
"deflate-frame",
lws_extension_callback_deflate_frame,
sizeof (struct lws_ext_deflate_frame_conn)
},
#endif
{ /* terminator */
NULL, NULL, 0
}

553
win32port/libwebsocketswin32/libwebsocketswin32.vcxproj
View file

@ -1,274 +1,279 @@
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