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Make header parsing more efficient, prepare multithreading and keep-alive.

erdgeist 12 years ago
parent
commit
f3c0359876
  1. 66
      opentracker.c
  2. 111
      ot_http.c
  3. 14
      ot_http.h

66
opentracker.c

@ -143,10 +143,8 @@ static size_t header_complete( char * request, ssize_t byte_count ) {
static void handle_dead( const int64 sock ) {
struct http_data* cookie=io_getcookie( sock );
if( cookie ) {
if( cookie->flag & STRUCT_HTTP_FLAG_IOB_USED )
iob_reset( &cookie->data.batch );
if( cookie->flag & STRUCT_HTTP_FLAG_ARRAY_USED )
array_reset( &cookie->data.request );
iob_reset( &cookie->batch );
array_reset( &cookie->request );
if( cookie->flag & STRUCT_HTTP_FLAG_WAITINGFORTASK )
mutex_workqueue_canceltask( sock );
free( cookie );
@ -154,46 +152,42 @@ static void handle_dead( const int64 sock ) {
io_close( sock );
}
static ssize_t handle_read( const int64 sock, struct ot_workstruct *ws ) {
static void handle_read( const int64 sock, struct ot_workstruct *ws ) {
struct http_data* cookie = io_getcookie( sock );
ssize_t byte_count;
if( ( byte_count = io_tryread( sock, ws->inbuf, G_INBUF_SIZE ) ) <= 0 ) {
handle_dead( sock );
return 0;
return;
}
/* If we get the whole request in one packet, handle it without copying */
if( !array_start( &cookie->data.request ) ) {
if( memchr( ws->inbuf, '\n', byte_count ) ) {
if( !array_start( &cookie->request ) ) {
if( ( ws->header_size = header_complete( ws->inbuf, byte_count ) ) ) {
ws->request = ws->inbuf;
ws->request_size = byte_count;
return http_handle_request( sock, ws );
}
/* ... else take a copy */
cookie->flag |= STRUCT_HTTP_FLAG_ARRAY_USED;
array_catb( &cookie->data.request, ws->inbuf, byte_count );
return 0;
http_handle_request( sock, ws );
} else
array_catb( &cookie->request, ws->inbuf, byte_count );
return;
}
array_catb( &cookie->data.request, ws->inbuf, byte_count );
if( array_failed( &cookie->data.request ) ||
array_bytes( &cookie->data.request ) > 8192 )
return http_issue_error( sock, ws, CODE_HTTPERROR_500 );
if( !memchr( array_start( &cookie->data.request ), '\n', array_bytes( &cookie->data.request ) ) )
return 0;
array_catb( &cookie->request, ws->inbuf, byte_count );
if( array_failed( &cookie->request ) || array_bytes( &cookie->request ) > 8192 ) {
http_issue_error( sock, ws, CODE_HTTPERROR_500 );
return;
}
ws->request = array_start( &cookie->data.request );
ws->request_size = array_bytes( &cookie->data.request );
return http_handle_request( sock, ws );
while( ( ws->header_size = header_complete( array_start( &cookie->request ), array_bytes( &cookie->request ) ) ) ) {
ws->request = array_start( &cookie->request );
ws->request_size = array_bytes( &cookie->request );
http_handle_request( sock, ws );
}
}
static void handle_write( const int64 sock ) {
struct http_data* cookie=io_getcookie( sock );
if( !cookie || ( iob_send( sock, &cookie->data.batch ) <= 0 ) )
if( !cookie || ( iob_send( sock, &cookie->batch ) <= 0 ) )
handle_dead( sock );
}
@ -214,12 +208,12 @@ static void handle_accept( const int64 serversocket ) {
io_close( sock );
continue;
}
io_setcookie( sock, cookie );
io_wantread( sock );
memset(cookie, 0, sizeof( struct http_data ) );
memcpy(cookie->ip,ip,sizeof(ot_ip6));
io_setcookie( sock, cookie );
io_wantread( sock );
stats_issue_event( EVENT_ACCEPT, FLAG_TCP, (uintptr_t)ip);
/* That breaks taia encapsulation. But there is no way to take system
@ -228,17 +222,16 @@ static void handle_accept( const int64 serversocket ) {
tai_unix( &(t.sec), (g_now_seconds + OT_CLIENT_TIMEOUT) );
io_timeout( sock, t );
}
if( errno == EAGAIN )
io_eagain( serversocket );
}
static void server_mainloop( ) {
static void * server_mainloop( void * args ) {
struct ot_workstruct ws;
time_t next_timeout_check = g_now_seconds + OT_CLIENT_TIMEOUT_CHECKINTERVAL;
struct iovec *iovector;
int iovec_entries;
(void)args;
/* Initialize our "thread local storage" */
ws.inbuf = malloc( G_INBUF_SIZE );
ws.outbuf = malloc( G_OUTBUF_SIZE );
@ -282,6 +275,7 @@ static void server_mainloop( ) {
/* Enforce setting the clock */
signal_handler( SIGALRM );
}
return 0;
}
static int64_t ot_try_bind( ot_ip6 ip, uint16_t port, PROTO_FLAG proto ) {
@ -475,7 +469,7 @@ void load_state(const char * const state_filename ) {
if( inbuf[ i++ ] != ':' || !( consumed = scan_ulonglong( inbuf+i, &downcount ) ) ) continue;
add_torrent_from_saved_state( infohash, base, downcount );
}
fclose( state_filehandle );
}
@ -606,7 +600,7 @@ int main( int argc, char **argv ) {
/* Kick off our initial clock setting alarm */
alarm(5);
server_mainloop( );
server_mainloop( 0 );
return 0;
}

111
ot_http.c

@ -18,6 +18,7 @@
#include "iob.h"
#include "ip6.h"
#include "scan.h"
#include "case.h"
/* Opentracker */
#include "trackerlogic.h"
@ -44,33 +45,42 @@ static void http_senddata( const int64 sock, struct ot_workstruct *ws ) {
struct http_data *cookie = io_getcookie( sock );
ssize_t written_size;
if( !cookie ) { io_close(sock); return; }
/* whoever sends data is not interested in its input-array */
if( cookie && ( cookie->flag & STRUCT_HTTP_FLAG_ARRAY_USED ) ) {
cookie->flag &= ~STRUCT_HTTP_FLAG_ARRAY_USED;
array_reset( &cookie->data.request );
}
if( ws->keep_alive && ws->header_size != ws->request_size ) {
size_t rest = ws->request_size - ws->header_size;
if( array_start(&cookie->request) ) {
memmove( array_start(&cookie->request), ws->request + ws->header_size, rest );
array_truncate( &cookie->request, 1, rest );
} else
array_catb(&cookie->request, ws->request + ws->header_size, rest );
} else
array_reset( &cookie->request );
written_size = write( sock, ws->reply, ws->reply_size );
if( ( written_size < 0 ) || ( written_size == ws->reply_size ) ) {
free( cookie ); io_close( sock );
} else {
if( ( written_size < 0 ) || ( ( written_size == ws->reply_size ) && !ws->keep_alive ) ) {
array_reset( &cookie->request );
free( cookie ); io_close( sock ); return;
}
if( written_size < ws->reply_size ) {
char * outbuf;
tai6464 t;
if( !cookie ) return;
if( !( outbuf = malloc( ws->reply_size - written_size ) ) ) {
if( !( outbuf = malloc( ws->reply_size - written_size ) ) ) {
free(cookie); io_close( sock );
return;
}
iob_reset( &cookie->data.batch );
memcpy( outbuf, ws->reply + written_size, ws->reply_size - written_size );
iob_addbuf_free( &cookie->data.batch, outbuf, ws->reply_size - written_size );
cookie->flag |= STRUCT_HTTP_FLAG_IOB_USED;
iob_addbuf_free( &cookie->batch, outbuf, ws->reply_size - written_size );
/* writeable short data sockets just have a tcp timeout */
taia_uint( &t, 0 ); io_timeout( sock, t );
io_dontwantread( sock );
if( !ws->keep_alive ) {
taia_uint( &t, 0 ); io_timeout( sock, t );
io_dontwantread( sock );
}
io_wantwrite( sock );
}
}
@ -93,7 +103,7 @@ ssize_t http_issue_error( const int64 sock, struct ot_workstruct *ws, int code )
if( code == CODE_HTTPERROR_302 )
ws->reply_size = snprintf( ws->reply, G_OUTBUF_SIZE, "HTTP/1.0 302 Found\r\nContent-Length: 0\r\nLocation: %s\r\n\r\n", g_redirecturl );
else
ws->reply_size = snprintf( ws->reply, G_OUTBUF_SIZE, "HTTP/1.0 %s\r\nContent-Type: text/html\r\nConnection: close\r\nContent-Length: %zd\r\n\r\n<title>%s</title>\n", title, strlen(title)+16-4,title+4);
ws->reply_size = snprintf( ws->reply, G_OUTBUF_SIZE, "HTTP/1.0 %s\r\nContent-Type: text/html\r\nContent-Length: %zd\r\n\r\n<title>%s</title>\n", title, strlen(title)+16-4,title+4);
#ifdef _DEBUG_HTTPERROR
fprintf( stderr, "DEBUG: invalid request was: %s\n", ws->debugbuf );
@ -116,12 +126,8 @@ ssize_t http_sendiovecdata( const int64 sock, struct ot_workstruct *ws, int iove
HTTPERROR_500;
}
/* If this socket collected request in a buffer,
free it now */
if( cookie->flag & STRUCT_HTTP_FLAG_ARRAY_USED ) {
cookie->flag &= ~STRUCT_HTTP_FLAG_ARRAY_USED;
array_reset( &cookie->data.request );
}
/* If this socket collected request in a buffer, free it now */
array_reset( &cookie->request );
/* If we came here, wait for the answer is over */
cookie->flag &= ~STRUCT_HTTP_FLAG_WAITINGFORTASK;
@ -145,16 +151,14 @@ ssize_t http_sendiovecdata( const int64 sock, struct ot_workstruct *ws, int iove
else
header_size = sprintf( header, "HTTP/1.0 200 OK\r\nContent-Type: text/plain\r\nContent-Length: %zd\r\n\r\n", size );
iob_reset( &cookie->data.batch );
iob_addbuf_free( &cookie->data.batch, header, header_size );
iob_reset( &cookie->batch );
iob_addbuf_free( &cookie->batch, header, header_size );
/* Will move to ot_iovec.c */
for( i=0; i<iovec_entries; ++i )
iob_addbuf_munmap( &cookie->data.batch, iovector[i].iov_base, iovector[i].iov_len );
iob_addbuf_munmap( &cookie->batch, iovector[i].iov_base, iovector[i].iov_len );
free( iovector );
cookie->flag |= STRUCT_HTTP_FLAG_IOB_USED;
/* writeable sockets timeout after 10 minutes */
taia_now( &t ); taia_addsec( &t, &t, OT_CLIENT_TIMEOUT_SEND );
io_timeout( sock, t );
@ -240,9 +244,7 @@ static const ot_keywords keywords_format[] =
}
/* Simple stats can be answerred immediately */
if( !( ws->reply_size = return_stats_for_tracker( ws->reply, mode, 0 ) ) ) HTTPERROR_500;
return ws->reply_size;
return ws->reply_size = return_stats_for_tracker( ws->reply, mode, 0 );
}
#ifdef WANT_MODEST_FULLSCRAPES
@ -336,7 +338,7 @@ static ssize_t http_handle_scrape( const int64 sock, struct ot_workstruct *ws, c
numwant = OT_MAXMULTISCRAPE_COUNT;
/* Enough for http header + whole scrape string */
if( !( ws->reply_size = return_tcp_scrape_for_torrent( multiscrape_buf, numwant, ws->reply ) ) ) HTTPERROR_500;
ws->reply_size = return_tcp_scrape_for_torrent( multiscrape_buf, numwant, ws->reply );
stats_issue_event( EVENT_SCRAPE, FLAG_TCP, ws->reply_size );
return ws->reply_size;
}
@ -345,6 +347,19 @@ static ssize_t http_handle_scrape( const int64 sock, struct ot_workstruct *ws, c
unsigned long long numwants[201];
#endif
static char* http_header( char *data, size_t byte_count, char *header ) {
size_t i;
long sl = strlen( header );
for( i = 0; i + sl + 2 < byte_count; ++i ) {
if( data[i] != '\n' || data[ i + sl + 1] != ':' ) continue;
if( !case_equalb( data + i + 1, sl, header ) ) continue;
data += i + sl + 2;
while( *data == ' ' || *data == '\t' ) ++data;
return data;
}
return 0;
}
static ot_keywords keywords_announce[] = { { "port", 1 }, { "left", 2 }, { "event", 3 }, { "numwant", 4 }, { "compact", 5 }, { "compact6", 5 }, { "info_hash", 6 },
#ifdef WANT_IP_FROM_QUERY_STRING
{ "ip", 7 },
@ -373,29 +388,12 @@ static ssize_t http_handle_announce( const int64 sock, struct ot_workstruct *ws,
#ifdef WANT_IP_FROM_PROXY
if( accesslist_isblessed( cookie->ip, OT_PERMISSION_MAY_PROXY ) ) {
ot_ip6 proxied_ip;
char *fwd, *fwd_new = ws->request;
/* Zero terminate for string routines. Normally we'd only overwrite bollocks */
ws->request[ws->request_size-1] = 0;
/* Find last occurence of the forwarded header */
do {
fwd = fwd_new;
fwd_new += 16;
fwd_new = strcasestr( fwd_new, "\nX-Forwarded-For:" );
} while( fwd_new );
/* Skip spaces between : and the ip address */
if( fwd ) {
fwd += 18; /* sizeof( "\nX-Forwarded-For:" ) */
while( *fwd == ' ' ) ++fwd;
}
char *fwd = http_header( ws->request, ws->header_size, "x-forwarded-for" );
if( fwd && scan_ip6( fwd, proxied_ip ) )
OT_SETIP( &peer, proxied_ip );
else
OT_SETIP( &peer, cookie->ip );
}
} else
#endif
OT_SETIP( &peer, cookie->ip );
OT_SETPORT( &peer, &port );
@ -509,8 +507,6 @@ static ssize_t http_handle_announce( const int64 sock, struct ot_workstruct *ws,
else
ws->reply_size = add_peer_to_torrent_and_return_peers( *hash, &peer, FLAG_TCP, numwant, ws->reply );
if( !ws->reply_size ) HTTPERROR_500;
stats_issue_event( EVENT_ANNOUNCE, FLAG_TCP, ws->reply_size);
return ws->reply_size;
}
@ -586,10 +582,17 @@ ssize_t http_handle_request( const int64 sock, struct ot_workstruct *ws ) {
else
HTTPERROR_404;
/* Find out if the client wants to keep this connection alive */
ws->keep_alive = 0;
#ifdef WANT_KEEPALIVE
read_ptr=http_header( ws->request, ws->header_size, "connection");
if( read_ptr && ( *read_ptr == 'K' || *read_ptr == 'k' ) ) ws->keep_alive = 1;
#endif
/* If routines handled sending themselves, just return */
if( ws->reply_size == -2 ) return 0;
/* If routine failed, let http error take over */
if( ws->reply_size == -1 ) HTTPERROR_500;
if( ws->reply_size <= 0 ) HTTPERROR_500;
/* This one is rather ugly, so I take you step by step through it.
@ -602,8 +605,8 @@ ssize_t http_handle_request( const int64 sock, struct ot_workstruct *ws ) {
ws->reply = ws->outbuf + reply_off;
/* 2. Now we sprintf our header so that sprintf writes its terminating '\0' exactly one byte before content starts. Complete
packet size is increased by size of header plus one byte '\n', we will copy over '\0' in next step */
ws->reply_size += 1 + sprintf( ws->reply, "HTTP/1.0 200 OK\r\nContent-Type: text/plain\r\nContent-Length: %zd\r\n\r", ws->reply_size );
packet size is increased by size of header plus one byte '\n', we will copy over '\0' in next step */
ws->reply_size += 1 + sprintf( ws->reply, "HTTP/1.1 200 OK\r\nContent-Type: text/plain\r\nContent-Length: %zd\r\n\r", ws->reply_size );
/* 3. Finally we join both blocks neatly */
ws->outbuf[ SUCCESS_HTTP_HEADER_LENGTH - 1 ] = '\n';

14
ot_http.h

@ -7,18 +7,14 @@
#define __OT_HTTP_H__
typedef enum {
STRUCT_HTTP_FLAG_ARRAY_USED = 1,
STRUCT_HTTP_FLAG_IOB_USED = 2,
STRUCT_HTTP_FLAG_WAITINGFORTASK = 4,
STRUCT_HTTP_FLAG_GZIP = 8,
STRUCT_HTTP_FLAG_BZIP2 = 16
STRUCT_HTTP_FLAG_WAITINGFORTASK = 1,
STRUCT_HTTP_FLAG_GZIP = 2,
STRUCT_HTTP_FLAG_BZIP2 = 4
} STRUCT_HTTP_FLAG;
struct http_data {
union {
array request;
io_batch batch;
} data;
array request;
io_batch batch;
ot_ip6 ip;
STRUCT_HTTP_FLAG flag;
};

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