Line data Source code
1 : #define _GNU_SOURCE
2 : #include "fd_http_server_private.h"
3 :
4 : #include "picohttpparser.h"
5 : #include "fd_sha1.h"
6 : #include "../base64/fd_base64.h"
7 : #include "../../util/net/fd_ip4.h"
8 :
9 : #include <stdarg.h>
10 : #include <stdio.h>
11 : #include <errno.h>
12 : #include <unistd.h>
13 : #include <poll.h>
14 : #include <stdlib.h>
15 : #include <strings.h>
16 : #include <sys/socket.h>
17 : #include <netinet/in.h>
18 :
19 : #define POOL_NAME ws_conn_pool
20 12 : #define POOL_T struct fd_http_server_ws_connection
21 : #define POOL_IDX_T ushort
22 0 : #define POOL_NEXT parent
23 : #include "../../util/tmpl/fd_pool.c"
24 :
25 : #define POOL_NAME conn_pool
26 12 : #define POOL_T struct fd_http_server_connection
27 : #define POOL_IDX_T ushort
28 18 : #define POOL_NEXT parent
29 : #include "../../util/tmpl/fd_pool.c"
30 :
31 : #define TREAP_NAME ws_conn_treap
32 : #define TREAP_T struct fd_http_server_ws_connection
33 : #define TREAP_QUERY_T void * /* We don't use query ... */
34 : #define TREAP_CMP(q,e) (__extension__({ (void)(q); (void)(e); -1; })) /* which means we don't need to give a real
35 : implementation to cmp either */
36 0 : #define TREAP_IDX_T ushort
37 : #define TREAP_OPTIMIZE_ITERATION 1
38 0 : #define TREAP_LT(e0,e1) ((e0)->send_frames[ (e0)->send_frame_idx ].off<(e1)->send_frames[ (e1)->send_frame_idx ].off)
39 :
40 : #include "../../util/tmpl/fd_treap.c"
41 :
42 : #define TREAP_NAME conn_treap
43 : #define TREAP_T struct fd_http_server_connection
44 : #define TREAP_QUERY_T void * /* We don't use query ... */
45 : #define TREAP_CMP(q,e) (__extension__({ (void)(q); (void)(e); -1; })) /* which means we don't need to give a real
46 : implementation to cmp either */
47 0 : #define TREAP_IDX_T ushort
48 : #define TREAP_OPTIMIZE_ITERATION 1
49 0 : #define TREAP_LT(e0,e1) ((e0)->response._body_off<(e1)->response._body_off)
50 :
51 : #include "../../util/tmpl/fd_treap.c"
52 :
53 : #define FD_HTTP_SERVER_DEBUG 0
54 :
55 : FD_FN_CONST char const *
56 0 : fd_http_server_connection_close_reason_str( int reason ) {
57 0 : switch( reason ) {
58 0 : case FD_HTTP_SERVER_CONNECTION_CLOSE_OK: return "OK-Connection was closed normally";
59 0 : case FD_HTTP_SERVER_CONNECTION_CLOSE_EVICTED: return "EVICTED-Connection was evicted to make room for a new one";
60 0 : case FD_HTTP_SERVER_CONNECTION_CLOSE_TOO_SLOW: return "TOO_SLOW-Client was too slow and did not read the reponse in time";
61 0 : case FD_HTTP_SERVER_CONNECTION_CLOSE_EXPECTED_EOF: return "EXPECTED_EOF-Client continued to send data when we expected no more";
62 0 : case FD_HTTP_SERVER_CONNECTION_CLOSE_PEER_RESET: return "PEER_RESET-Connection was reset by peer";
63 0 : case FD_HTTP_SERVER_CONNECTION_CLOSE_LARGE_REQUEST: return "LARGE_REQUEST-Request body was too large";
64 0 : case FD_HTTP_SERVER_CONNECTION_CLOSE_BAD_REQUEST: return "BAD_REQUEST-Request was malformed";
65 0 : case FD_HTTP_SERVER_CONNECTION_CLOSE_MISSING_CONENT_LENGTH_HEADER: return "MISSING_CONENT_LENGTH_HEADER-Missing Content-Length header field";
66 0 : case FD_HTTP_SERVER_CONNECTION_CLOSE_UNKNOWN_METHOD: return "UNKNOWN_METHOD-Request method was not recognized";
67 0 : case FD_HTTP_SERVER_CONNECTION_CLOSE_PATH_TOO_LONG: return "PATH_TOO_LONG-Request path was too long";
68 0 : case FD_HTTP_SERVER_CONNECTION_CLOSE_WS_BAD_KEY: return "WS_BAD_KEY-Malformed Sec-WebSocket-Key header field";
69 0 : case FD_HTTP_SERVER_CONNECTION_CLOSE_WS_UNEXPECTED_VERSION: return "WS_UNEXPECTED_VERSION-Unexpected Sec-Websocket-Version field";
70 0 : case FD_HTTP_SERVER_CONNECTION_CLOSE_WS_MISSING_KEY_HEADER: return "WS_MISSING_KEY_HEADER-Missing Sec-WebSocket-Key header field";
71 0 : case FD_HTTP_SERVER_CONNECTION_CLOSE_WS_MISSING_VERSION_HEADER: return "WS_MISSING_VERSION_HEADER-Missing Sec-WebSocket-Version header field";
72 0 : case FD_HTTP_SERVER_CONNECTION_CLOSE_WS_BAD_MASK: return "WS_BAD_MASK-Got frame from client without mask flag set";
73 0 : case FD_HTTP_SERVER_CONNECTION_CLOSE_WS_UNKNOWN_OPCODE: return "WS_UNKNOWN_OPCODE-Unknown opcode in websocket frame";
74 0 : case FD_HTTP_SERVER_CONNECTION_CLOSE_WS_OVERSIZE_FRAME: return "WS_OVERSIZE_FRAME-Websocket frame was too large";
75 0 : case FD_HTTP_SERVER_CONNECTION_CLOSE_WS_CLIENT_TOO_SLOW: return "WS_CLIENT_TOO_SLOW-Client was too slow to keep up with sender";
76 0 : case FD_HTTP_SERVER_CONNECTION_CLOSE_WS_MISSING_UPGRADE: return "WS_MISSING_UPGRADE-Missing Upgrade header field";
77 0 : case FD_HTTP_SERVER_CONNECTION_CLOSE_WS_EXPECTED_CONT_OPCODE: return "WS_EXPECTED_CONT_OPCODE-Expected continuation opcode in websocket frame";
78 0 : case FD_HTTP_SERVER_CONNECTION_CLOSE_WS_EXPECTED_TEXT_OPCODE: return "WS_EXPECTED_TEXT_OPCODE-Expected text opcode in websocket frame";
79 0 : case FD_HTTP_SERVER_CONNECTION_CLOSE_WS_CONTROL_FRAME_TOO_LARGE: return "WS_CONTROL_FRAME_TOO_LARGE-Websocket control frame was too large";
80 0 : case FD_HTTP_SERVER_CONNECTION_CLOSE_WS_CHANGED_OPCODE: return "FD_HTTP_SERVER_CONNECTION_CLOSE_WS_CHANGED_OPCODE-Websocket frame type changed unexpectedly";
81 0 : default: break;
82 0 : }
83 :
84 0 : return "unknown";
85 0 : }
86 :
87 : FD_FN_CONST char const *
88 0 : fd_http_server_method_str( uchar method ) {
89 0 : switch( method ) {
90 0 : case FD_HTTP_SERVER_METHOD_GET: return "GET";
91 0 : case FD_HTTP_SERVER_METHOD_POST: return "POST";
92 0 : default: break;
93 0 : }
94 :
95 0 : return "unknown";
96 0 : }
97 :
98 : FD_FN_CONST ulong
99 9 : fd_http_server_align( void ) {
100 9 : return FD_HTTP_SERVER_ALIGN;
101 9 : }
102 :
103 : FD_FN_CONST ulong
104 12 : fd_http_server_footprint( fd_http_server_params_t params ) {
105 12 : ulong l = FD_LAYOUT_INIT;
106 12 : l = FD_LAYOUT_APPEND( l, FD_HTTP_SERVER_ALIGN, sizeof( fd_http_server_t ) );
107 12 : l = FD_LAYOUT_APPEND( l, conn_pool_align(), conn_pool_footprint( params.max_connection_cnt ) );
108 12 : l = FD_LAYOUT_APPEND( l, ws_conn_pool_align(), ws_conn_pool_footprint( params.max_ws_connection_cnt ) );
109 12 : l = FD_LAYOUT_APPEND( l, conn_treap_align(), conn_treap_footprint( params.max_connection_cnt ) );
110 12 : l = FD_LAYOUT_APPEND( l, ws_conn_treap_align(), ws_conn_treap_footprint( params.max_ws_connection_cnt ) );
111 12 : l = FD_LAYOUT_APPEND( l, alignof( struct pollfd ), (params.max_connection_cnt+params.max_ws_connection_cnt+1UL)*sizeof( struct pollfd ) );
112 12 : l = FD_LAYOUT_APPEND( l, 1UL, params.max_request_len*params.max_connection_cnt );
113 12 : l = FD_LAYOUT_APPEND( l, 1UL, params.max_ws_recv_frame_len*params.max_ws_connection_cnt );
114 12 : l = FD_LAYOUT_APPEND( l, alignof( struct fd_http_server_ws_frame ), params.max_ws_send_frame_cnt*params.max_ws_connection_cnt*sizeof( struct fd_http_server_ws_frame ) );
115 12 : l = FD_LAYOUT_APPEND( l, 1UL, params.outgoing_buffer_sz );
116 12 : return FD_LAYOUT_FINI( l, fd_http_server_align() );
117 12 : }
118 :
119 : void *
120 : fd_http_server_new( void * shmem,
121 : fd_http_server_params_t params,
122 : fd_http_server_callbacks_t callbacks,
123 6 : void * callback_ctx ) {
124 6 : if( FD_UNLIKELY( !shmem ) ) {
125 0 : FD_LOG_WARNING(( "NULL shmem" ));
126 0 : return NULL;
127 0 : }
128 :
129 6 : if( FD_UNLIKELY( !fd_ulong_is_aligned( (ulong)shmem, fd_http_server_align() ) ) ) {
130 0 : FD_LOG_WARNING(( "misaligned shmem" ));
131 0 : return NULL;
132 0 : }
133 :
134 6 : if( FD_UNLIKELY( params.max_ws_connection_cnt && params.max_ws_recv_frame_len<params.max_request_len ) ) {
135 0 : FD_LOG_WARNING(( "max_ws_recv_frame_len<max_request_len" ));
136 0 : return NULL;
137 0 : }
138 :
139 6 : FD_SCRATCH_ALLOC_INIT( l, shmem );
140 6 : fd_http_server_t * http = FD_SCRATCH_ALLOC_APPEND( l, FD_HTTP_SERVER_ALIGN, sizeof(fd_http_server_t) );
141 6 : void * conn_pool = FD_SCRATCH_ALLOC_APPEND( l, conn_pool_align(), conn_pool_footprint( params.max_connection_cnt ) );
142 6 : void * ws_conn_pool = FD_SCRATCH_ALLOC_APPEND( l, ws_conn_pool_align(), ws_conn_pool_footprint( params.max_ws_connection_cnt ) );
143 6 : http->conn_treap = FD_SCRATCH_ALLOC_APPEND( l, conn_treap_align(), conn_treap_footprint( params.max_connection_cnt ) );
144 6 : http->ws_conn_treap = FD_SCRATCH_ALLOC_APPEND( l, ws_conn_treap_align(), ws_conn_treap_footprint( params.max_ws_connection_cnt ) );
145 6 : http->pollfds = FD_SCRATCH_ALLOC_APPEND( l, alignof(struct pollfd), (params.max_connection_cnt+params.max_ws_connection_cnt+1UL)*sizeof( struct pollfd ) );
146 6 : char * _request_bytes = FD_SCRATCH_ALLOC_APPEND( l, 1UL, params.max_request_len*params.max_connection_cnt );
147 6 : uchar * _ws_recv_bytes = FD_SCRATCH_ALLOC_APPEND( l, 1UL, params.max_ws_recv_frame_len*params.max_ws_connection_cnt );
148 6 : struct fd_http_server_ws_frame * _ws_send_frames = FD_SCRATCH_ALLOC_APPEND( l, alignof(struct fd_http_server_ws_frame), params.max_ws_send_frame_cnt*params.max_ws_connection_cnt*sizeof(struct fd_http_server_ws_frame) );
149 6 : http->oring = FD_SCRATCH_ALLOC_APPEND( l, 1UL, params.outgoing_buffer_sz );
150 :
151 0 : http->oring_sz = params.outgoing_buffer_sz;
152 6 : http->stage_err = 0;
153 6 : http->stage_off = 0UL;
154 6 : http->stage_len = 0UL;
155 :
156 6 : http->callbacks = callbacks;
157 6 : http->callback_ctx = callback_ctx;
158 6 : http->evict_conn_id = 0UL;
159 6 : http->evict_ws_conn_id = 0UL;
160 6 : http->max_conns = params.max_connection_cnt;
161 6 : http->max_ws_conns = params.max_ws_connection_cnt;
162 6 : http->max_request_len = params.max_request_len;
163 6 : http->max_ws_recv_frame_len = params.max_ws_recv_frame_len;
164 6 : http->max_ws_send_frame_cnt = params.max_ws_send_frame_cnt;
165 :
166 6 : http->conns = conn_pool_join( conn_pool_new( conn_pool, params.max_connection_cnt ) );
167 6 : conn_treap_join( conn_treap_new( http->conn_treap, params.max_connection_cnt ) );
168 6 : conn_treap_seed( http->conns, params.max_connection_cnt, 42UL );
169 :
170 6 : http->ws_conns = ws_conn_pool_join( ws_conn_pool_new( ws_conn_pool, params.max_ws_connection_cnt ) );
171 6 : ws_conn_treap_join( ws_conn_treap_new( http->ws_conn_treap, params.max_ws_connection_cnt ) );
172 6 : ws_conn_treap_seed( http->ws_conns, params.max_ws_connection_cnt, 42UL );
173 :
174 24 : for( ulong i=0UL; i<params.max_connection_cnt; i++ ) {
175 18 : http->pollfds[ i ].fd = -1;
176 18 : http->pollfds[ i ].events = POLLIN | POLLOUT;
177 18 : http->conns[ i ] = (struct fd_http_server_connection){
178 18 : .request_bytes = _request_bytes+i*params.max_request_len,
179 18 : .parent = http->conns[ i ].parent,
180 18 : };
181 18 : }
182 :
183 6 : for( ulong i=0UL; i<params.max_ws_connection_cnt; i++ ) {
184 0 : http->pollfds[ params.max_connection_cnt+i ].fd = -1;
185 0 : http->pollfds[ params.max_connection_cnt+i ].events = POLLIN | POLLOUT;
186 0 : http->ws_conns[ i ] = (struct fd_http_server_ws_connection){
187 0 : .recv_bytes = _ws_recv_bytes+i*params.max_ws_recv_frame_len,
188 0 : .send_frames = _ws_send_frames+i*params.max_ws_send_frame_cnt,
189 0 : .parent = http->ws_conns[ i ].parent,
190 0 : };
191 0 : }
192 :
193 6 : http->pollfds[ params.max_connection_cnt+params.max_ws_connection_cnt ].fd = -1;
194 6 : http->pollfds[ params.max_connection_cnt+params.max_ws_connection_cnt ].events = POLLIN | POLLOUT;
195 :
196 6 : FD_COMPILER_MFENCE();
197 6 : FD_VOLATILE( http->magic ) = FD_HTTP_SERVER_MAGIC;
198 6 : FD_COMPILER_MFENCE();
199 :
200 6 : return (void *)http;
201 6 : }
202 :
203 : fd_http_server_t *
204 6 : fd_http_server_join( void * shhttp ) {
205 :
206 6 : if( FD_UNLIKELY( !shhttp ) ) {
207 0 : FD_LOG_WARNING(( "NULL shhttp" ));
208 0 : return NULL;
209 0 : }
210 :
211 6 : if( FD_UNLIKELY( !fd_ulong_is_aligned( (ulong)shhttp, fd_http_server_align() ) ) ) {
212 0 : FD_LOG_WARNING(( "misaligned shhttp" ));
213 0 : return NULL;
214 0 : }
215 :
216 6 : fd_http_server_t * http = (fd_http_server_t *)shhttp;
217 :
218 6 : if( FD_UNLIKELY( http->magic!=FD_HTTP_SERVER_MAGIC ) ) {
219 0 : FD_LOG_WARNING(( "bad magic" ));
220 0 : return NULL;
221 0 : }
222 :
223 6 : return http;
224 6 : }
225 :
226 : void *
227 3 : fd_http_server_leave( fd_http_server_t * http ) {
228 :
229 3 : if( FD_UNLIKELY( !http ) ) {
230 0 : FD_LOG_WARNING(( "NULL http" ));
231 0 : return NULL;
232 0 : }
233 :
234 3 : return (void *)http;
235 3 : }
236 :
237 : void *
238 3 : fd_http_server_delete( void * shhttp ) {
239 :
240 3 : if( FD_UNLIKELY( !shhttp ) ) {
241 0 : FD_LOG_WARNING(( "NULL shhttp" ));
242 0 : return NULL;
243 0 : }
244 :
245 3 : if( FD_UNLIKELY( !fd_ulong_is_aligned( (ulong)shhttp, fd_http_server_align() ) ) ) {
246 0 : FD_LOG_WARNING(( "misaligned shhttp" ));
247 0 : return NULL;
248 0 : }
249 :
250 3 : fd_http_server_t * http = (fd_http_server_t *)shhttp;
251 :
252 3 : if( FD_UNLIKELY( http->magic!=FD_HTTP_SERVER_MAGIC ) ) {
253 0 : FD_LOG_WARNING(( "bad magic" ));
254 0 : return NULL;
255 0 : }
256 :
257 3 : FD_COMPILER_MFENCE();
258 3 : FD_VOLATILE( http->magic ) = 0UL;
259 3 : FD_COMPILER_MFENCE();
260 :
261 3 : return (void *)http;
262 3 : }
263 :
264 : int
265 0 : fd_http_server_fd( fd_http_server_t * http ) {
266 0 : return http->socket_fd;
267 0 : }
268 :
269 : fd_http_server_t *
270 : fd_http_server_listen( fd_http_server_t * http,
271 : uint address,
272 0 : ushort port ) {
273 0 : int sockfd = socket( AF_INET, SOCK_STREAM | SOCK_NONBLOCK, 0 );
274 0 : if( FD_UNLIKELY( -1==sockfd ) ) FD_LOG_ERR(( "socket failed (%i-%s)", errno, strerror( errno ) ));
275 :
276 0 : int optval = 1;
277 0 : if( FD_UNLIKELY( -1==setsockopt( sockfd, SOL_SOCKET, SO_REUSEADDR, &optval, sizeof( optval ) ) ) )
278 0 : FD_LOG_ERR(( "setsockopt failed (%i-%s)", errno, strerror( errno ) ));
279 :
280 0 : struct sockaddr_in addr = {
281 0 : .sin_family = AF_INET,
282 0 : .sin_port = fd_ushort_bswap( port ),
283 0 : .sin_addr.s_addr = address,
284 0 : };
285 :
286 0 : if( FD_UNLIKELY( -1==bind( sockfd, fd_type_pun( &addr ), sizeof( addr ) ) ) ) {
287 0 : FD_LOG_ERR(( "bind(%i,AF_INET," FD_IP4_ADDR_FMT ":%u) failed (%i-%s)",
288 0 : sockfd, FD_IP4_ADDR_FMT_ARGS( address ), port,
289 0 : errno, fd_io_strerror( errno ) ));
290 0 : }
291 0 : if( FD_UNLIKELY( -1==listen( sockfd, (int)http->max_conns ) ) ) FD_LOG_ERR(( "listen failed (%i-%s)", errno, fd_io_strerror( errno ) ));
292 :
293 0 : http->socket_fd = sockfd;
294 0 : http->pollfds[ http->max_conns+http->max_ws_conns ].fd = http->socket_fd;
295 :
296 0 : return http;
297 0 : }
298 :
299 : static void
300 : close_conn( fd_http_server_t * http,
301 : ulong conn_idx,
302 0 : int reason ) {
303 0 : FD_TEST( http->pollfds[ conn_idx ].fd!=-1 );
304 : #if FD_HTTP_SERVER_DEBUG
305 : FD_LOG_NOTICE(( "Closing connection %lu (fd=%d) (%d-%s)", conn_idx, http->pollfds[ conn_idx ].fd, reason, fd_http_server_connection_close_reason_str( reason ) ));
306 : #endif
307 :
308 0 : if( FD_UNLIKELY( -1==close( http->pollfds[ conn_idx ].fd ) ) ) FD_LOG_ERR(( "close failed (%i-%s)", errno, strerror( errno ) ));
309 :
310 0 : http->pollfds[ conn_idx ].fd = -1;
311 0 : if( FD_LIKELY( conn_idx<http->max_conns ) ) {
312 0 : if( FD_LIKELY( http->callbacks.close ) ) http->callbacks.close( conn_idx, reason, http->callback_ctx );
313 0 : } else {
314 0 : if( FD_LIKELY( http->callbacks.ws_close ) ) http->callbacks.ws_close( conn_idx-http->max_conns, reason, http->callback_ctx );
315 0 : }
316 :
317 0 : if( FD_UNLIKELY( conn_idx<http->max_conns ) ) {
318 0 : struct fd_http_server_connection * conn = &http->conns[ conn_idx ];
319 0 : if( FD_LIKELY( (conn->state==FD_HTTP_SERVER_CONNECTION_STATE_WRITING_HEADER || conn->state==FD_HTTP_SERVER_CONNECTION_STATE_WRITING_BODY)
320 0 : && !conn->response.static_body ) ) {
321 0 : conn_treap_ele_remove( http->conn_treap, conn, http->conns );
322 0 : }
323 0 : conn_pool_ele_release( http->conns, conn );
324 0 : } else {
325 0 : struct fd_http_server_ws_connection * ws_conn = &http->ws_conns[ conn_idx-http->max_conns ];
326 0 : if( FD_LIKELY( ws_conn->send_frame_cnt ) ) ws_conn_treap_ele_remove( http->ws_conn_treap, ws_conn, http->ws_conns );
327 0 : ws_conn_pool_ele_release( http->ws_conns, ws_conn );
328 0 : }
329 0 : }
330 :
331 : void
332 : fd_http_server_close( fd_http_server_t * http,
333 : ulong conn_id,
334 0 : int reason ) {
335 0 : close_conn( http, conn_id, reason );
336 0 : }
337 :
338 : void
339 : fd_http_server_ws_close( fd_http_server_t * http,
340 : ulong ws_conn_id,
341 0 : int reason ) {
342 0 : close_conn( http, http->max_conns+ws_conn_id, reason );
343 0 : }
344 :
345 : /* These are the expected network errors which just mean the connection
346 : should be closed. Any errors from an accept(2), read(2), or send(2)
347 : that are not expected here will be considered fatal and terminate the
348 : server. */
349 :
350 : static inline int
351 0 : is_expected_network_error( int err ) {
352 0 : return
353 0 : err==ENETDOWN ||
354 0 : err==EPROTO ||
355 0 : err==ENOPROTOOPT ||
356 0 : err==EHOSTDOWN ||
357 0 : err==ENONET ||
358 0 : err==EHOSTUNREACH ||
359 0 : err==EOPNOTSUPP ||
360 0 : err==ENETUNREACH ||
361 0 : err==ETIMEDOUT ||
362 0 : err==ENETRESET ||
363 0 : err==ECONNABORTED ||
364 0 : err==ECONNRESET ||
365 0 : err==EPIPE;
366 0 : }
367 :
368 : static void
369 0 : accept_conns( fd_http_server_t * http ) {
370 0 : for(;;) {
371 0 : int fd = accept4( http->socket_fd, NULL, NULL, SOCK_NONBLOCK|SOCK_CLOEXEC );
372 :
373 0 : if( FD_UNLIKELY( -1==fd ) ) {
374 0 : if( FD_LIKELY( EAGAIN==errno ) ) break;
375 0 : else if( FD_LIKELY( is_expected_network_error( errno ) ) ) continue;
376 0 : else FD_LOG_ERR(( "accept failed (%i-%s)", errno, strerror( errno ) ));
377 0 : }
378 :
379 0 : if( FD_UNLIKELY( !conn_pool_free( http->conns ) ) ) {
380 0 : conn_treap_rev_iter_t it = conn_treap_fwd_iter_init( http->conn_treap, http->conns );
381 0 : if( FD_LIKELY( !conn_treap_fwd_iter_done( it ) ) ) {
382 0 : ulong conn_id = conn_treap_fwd_iter_idx( it );
383 0 : close_conn( http, conn_id, FD_HTTP_SERVER_CONNECTION_CLOSE_EVICTED );
384 0 : } else {
385 : /* If nobody is slow to read, just evict round robin */
386 0 : close_conn( http, http->evict_conn_id, FD_HTTP_SERVER_CONNECTION_CLOSE_EVICTED );
387 0 : http->evict_conn_id = (http->evict_conn_id+1UL) % http->max_conns;
388 0 : }
389 0 : }
390 :
391 0 : ulong conn_id = conn_pool_idx_acquire( http->conns );
392 :
393 0 : http->pollfds[ conn_id ].fd = fd;
394 0 : http->conns[ conn_id ].state = FD_HTTP_SERVER_CONNECTION_STATE_READING;
395 0 : http->conns[ conn_id ].request_bytes_read = 0UL;
396 0 : http->conns[ conn_id ].response_bytes_written = 0UL;
397 :
398 0 : if( FD_UNLIKELY( http->callbacks.open ) ) {
399 0 : http->callbacks.open( conn_id, fd, http->callback_ctx );
400 0 : }
401 :
402 : #if FD_HTTP_SERVER_DEBUG
403 : FD_LOG_NOTICE(( "Accepted connection %lu (fd=%d)", conn_id, fd ));
404 : #endif
405 0 : }
406 0 : }
407 :
408 : static void
409 : read_conn_http( fd_http_server_t * http,
410 0 : ulong conn_idx ) {
411 0 : struct fd_http_server_connection * conn = &http->conns[ conn_idx ];
412 :
413 0 : if( FD_UNLIKELY( conn->state!=FD_HTTP_SERVER_CONNECTION_STATE_READING ) ) {
414 0 : close_conn( http, conn_idx, FD_HTTP_SERVER_CONNECTION_CLOSE_EXPECTED_EOF );
415 0 : return;
416 0 : }
417 :
418 0 : long sz = read( http->pollfds[ conn_idx ].fd, conn->request_bytes+conn->request_bytes_read, http->max_request_len-conn->request_bytes_read );
419 0 : if( FD_UNLIKELY( -1==sz && errno==EAGAIN ) ) return; /* No data to read, continue. */
420 0 : else if( FD_UNLIKELY( !sz || (-1==sz && is_expected_network_error( errno ) ) ) ) {
421 0 : close_conn( http, conn_idx, FD_HTTP_SERVER_CONNECTION_CLOSE_PEER_RESET );
422 0 : return;
423 0 : }
424 0 : else if( FD_UNLIKELY( -1==sz ) ) FD_LOG_ERR(( "read failed (%i-%s)", errno, strerror( errno ) )); /* Unexpected programmer error, abort */
425 :
426 : /* New data was read... process it */
427 0 : conn->request_bytes_read += (ulong)sz;
428 0 : if( FD_UNLIKELY( conn->request_bytes_read==http->max_request_len ) ) {
429 0 : close_conn( http, conn_idx, FD_HTTP_SERVER_CONNECTION_CLOSE_LARGE_REQUEST );
430 0 : return;
431 0 : }
432 :
433 0 : char const * method;
434 0 : ulong method_len;
435 0 : char const * path;
436 0 : ulong path_len;
437 0 : int minor_version;
438 0 : struct phr_header headers[ 32 ];
439 0 : ulong num_headers = 32UL;
440 0 : int result = phr_parse_request( conn->request_bytes,
441 0 : conn->request_bytes_read,
442 0 : &method, &method_len,
443 0 : &path, &path_len,
444 0 : &minor_version,
445 0 : headers, &num_headers,
446 0 : conn->request_bytes_read - (ulong)sz );
447 0 : if( FD_UNLIKELY( -2==result ) ) return; /* Request still partial, wait for more data */
448 0 : else if( FD_UNLIKELY( -1==result ) ) {
449 0 : close_conn( http, conn_idx, FD_HTTP_SERVER_CONNECTION_CLOSE_BAD_REQUEST );
450 0 : return;
451 0 : }
452 :
453 0 : FD_TEST( result>0 && (ulong)result<=conn->request_bytes_read );
454 :
455 0 : uchar method_enum = UCHAR_MAX;
456 0 : if( FD_LIKELY( method_len==3UL && !strncmp( method, "GET", method_len ) ) ) method_enum = FD_HTTP_SERVER_METHOD_GET;
457 0 : else if( FD_LIKELY( method_len==4UL && !strncmp( method, "POST", method_len ) ) ) method_enum = FD_HTTP_SERVER_METHOD_POST;
458 0 : else if( FD_LIKELY( method_len==7UL && !strncmp( method, "OPTIONS", method_len ) ) ) method_enum = FD_HTTP_SERVER_METHOD_OPTIONS;
459 :
460 0 : if( FD_UNLIKELY( method_enum==UCHAR_MAX ) ) {
461 0 : close_conn( http, conn_idx, FD_HTTP_SERVER_CONNECTION_CLOSE_UNKNOWN_METHOD );
462 0 : return;
463 0 : }
464 :
465 0 : ulong content_len = 0UL;
466 0 : ulong content_length_len = 0UL;
467 0 : if( FD_UNLIKELY( method_enum==FD_HTTP_SERVER_METHOD_POST ) ) {
468 0 : char const * content_length = NULL;
469 0 : for( ulong i=0UL; i<num_headers; i++ ) {
470 0 : if( FD_LIKELY( headers[ i ].name_len==14UL && !strncasecmp( headers[ i ].name, "Content-Length", 14UL ) && headers[ i ].value_len>0UL ) ) {
471 0 : content_length = headers[ i ].value;
472 0 : content_length_len = headers[ i ].value_len;
473 0 : break;
474 0 : }
475 0 : }
476 :
477 0 : if( FD_UNLIKELY( !content_length ) ) {
478 0 : close_conn( http, conn_idx, FD_HTTP_SERVER_CONNECTION_CLOSE_MISSING_CONENT_LENGTH_HEADER );
479 0 : return;
480 0 : }
481 :
482 0 : for( ulong i=0UL; i<content_length_len; i++ ) {
483 0 : if( FD_UNLIKELY( content_length[ i ]<'0' || content_length[ i ]>'9' ) ) {
484 0 : close_conn( http, conn_idx, FD_HTTP_SERVER_CONNECTION_CLOSE_BAD_REQUEST );
485 0 : return;
486 0 : }
487 :
488 0 : ulong next = content_len*10UL + (ulong)(content_length[ i ]-'0');
489 0 : if( FD_UNLIKELY( next<content_len ) ) { /* Overflow */
490 0 : close_conn( http, conn_idx, FD_HTTP_SERVER_CONNECTION_CLOSE_LARGE_REQUEST );
491 0 : return;
492 0 : }
493 :
494 0 : content_len = next;
495 0 : }
496 :
497 0 : ulong total_len = (ulong)result+content_len;
498 :
499 0 : if( FD_UNLIKELY( total_len<content_len ) ) { /* Overflow */
500 0 : close_conn( http, conn_idx, FD_HTTP_SERVER_CONNECTION_CLOSE_LARGE_REQUEST );
501 0 : return;
502 0 : }
503 :
504 :
505 0 : if( FD_UNLIKELY( conn->request_bytes_read<(ulong)result+content_len ) ) {
506 0 : return; /* Request still partial, wait for more data */
507 0 : }
508 0 : }
509 :
510 0 : char content_type_nul_terminated[ 128 ] = {0};
511 0 : char accept_encoding_nul_terminated[ 128 ] = {0};
512 0 : for( ulong i=0UL; i<num_headers; i++ ) {
513 0 : if( FD_LIKELY( headers[ i ].name_len==12UL && !strncasecmp( headers[ i ].name, "Content-Type", 12UL ) ) ) {
514 0 : if( FD_UNLIKELY( headers[ i ].value_len>(sizeof(content_type_nul_terminated)-1UL) ) ) {
515 0 : close_conn( http, conn_idx, FD_HTTP_SERVER_CONNECTION_CLOSE_BAD_REQUEST );
516 0 : return;
517 0 : }
518 0 : memcpy( content_type_nul_terminated, headers[ i ].value, headers[ i ].value_len );
519 0 : break;
520 0 : }
521 :
522 0 : if( FD_LIKELY( headers[ i ].name_len==15UL && !strncasecmp( headers[ i ].name, "Accept-Encoding", 15UL ) ) ) {
523 0 : if( FD_UNLIKELY( headers[ i ].value_len>(sizeof(accept_encoding_nul_terminated)-1UL) ) ) {
524 0 : close_conn( http, conn_idx, FD_HTTP_SERVER_CONNECTION_CLOSE_BAD_REQUEST );
525 0 : return;
526 0 : }
527 0 : memcpy( accept_encoding_nul_terminated, headers[ i ].value, headers[ i ].value_len );
528 0 : }
529 0 : }
530 :
531 0 : char path_nul_terminated[ 128 ] = {0};
532 0 : if( FD_UNLIKELY( path_len>(sizeof( path_nul_terminated )-1UL) ) ) {
533 0 : close_conn( http, conn_idx, FD_HTTP_SERVER_CONNECTION_CLOSE_PATH_TOO_LONG );
534 0 : return;
535 0 : }
536 0 : memcpy( path_nul_terminated, path, path_len );
537 :
538 0 : char const * upgrade_key = NULL;
539 0 : for( ulong i=0UL; i<num_headers; i++ ) {
540 0 : if( FD_LIKELY( headers[ i ].name_len==7UL && !strncasecmp( headers[ i ].name, "Upgrade", 7UL ) && headers[ i ].value_len==9UL ) ) {
541 0 : upgrade_key = headers[ i ].value;
542 0 : break;
543 0 : }
544 0 : }
545 :
546 0 : conn->upgrade_websocket = 0;
547 0 : if( FD_UNLIKELY( upgrade_key && !strncmp( upgrade_key, "websocket", 9UL ) ) ) {
548 0 : conn->request_bytes_len = (ulong)result;
549 0 : conn->upgrade_websocket = 1;
550 :
551 0 : char const * sec_websocket_key = NULL;
552 0 : for( ulong i=0UL; i<num_headers; i++ ) {
553 0 : if( FD_LIKELY( headers[ i ].name_len==17UL && !strncasecmp( headers[ i ].name, "Sec-WebSocket-Key", 17UL ) ) ) {
554 0 : sec_websocket_key = headers[ i ].value;
555 0 : if( FD_UNLIKELY( headers[ i ].value_len!=24 ) ) {
556 0 : close_conn( http, conn_idx, FD_HTTP_SERVER_CONNECTION_CLOSE_WS_BAD_KEY );
557 0 : return;
558 0 : }
559 0 : break;
560 0 : }
561 0 : }
562 :
563 0 : char const * sec_websocket_version = NULL;
564 0 : for( ulong i=0UL; i<num_headers; i++ ) {
565 0 : if( FD_LIKELY( headers[ i ].name_len==21UL && !strncasecmp( headers[ i ].name, "Sec-Websocket-Version", 21UL ) ) ) {
566 0 : sec_websocket_version = headers[ i ].value;
567 0 : if( FD_UNLIKELY( headers[ i ].value_len!=2 || strncmp( sec_websocket_version, "13", 2UL ) ) ) {
568 0 : close_conn( http, conn_idx, FD_HTTP_SERVER_CONNECTION_CLOSE_WS_UNEXPECTED_VERSION );
569 0 : return;
570 0 : }
571 0 : break;
572 0 : }
573 0 : }
574 :
575 0 : if( FD_UNLIKELY( !sec_websocket_key ) ) {
576 0 : close_conn( http, conn_idx, FD_HTTP_SERVER_CONNECTION_CLOSE_WS_MISSING_KEY_HEADER );
577 0 : return;
578 0 : }
579 :
580 0 : if( FD_UNLIKELY( !sec_websocket_version ) ) {
581 0 : close_conn( http, conn_idx, FD_HTTP_SERVER_CONNECTION_CLOSE_WS_MISSING_VERSION_HEADER );
582 0 : return;
583 0 : }
584 :
585 0 : conn->sec_websocket_key = sec_websocket_key;
586 0 : }
587 :
588 0 : conn->state = FD_HTTP_SERVER_CONNECTION_STATE_WRITING_HEADER;
589 :
590 0 : fd_http_server_request_t request = {
591 0 : .connection_id = conn_idx,
592 :
593 0 : .method = method_enum,
594 0 : .path = path_nul_terminated,
595 :
596 0 : .ctx = http->callback_ctx,
597 :
598 0 : .headers.content_type = content_type_nul_terminated,
599 0 : .headers.accept_encoding = accept_encoding_nul_terminated,
600 0 : .headers.upgrade_websocket = conn->upgrade_websocket,
601 0 : };
602 :
603 0 : switch( method_enum ) {
604 0 : case FD_HTTP_SERVER_METHOD_POST: {
605 0 : request.post.body = (uchar*)conn->request_bytes+result;
606 0 : request.post.body_len = content_len;
607 0 : } break;
608 0 : default: break;
609 0 : }
610 :
611 0 : fd_http_server_response_t response = http->callbacks.request( &request );
612 0 : if( FD_LIKELY( http->pollfds[ conn_idx ].fd==-1 ) ) return; /* Connection was closed by callback */
613 0 : conn->response = response;
614 :
615 : #if FD_HTTP_SERVER_DEBUG
616 : FD_LOG_NOTICE(( "Received %s request \"%s\" from %lu (fd=%d) response code %lu", fd_http_server_method_str( method_enum ), path_nul_terminated, conn_idx, http->pollfds[ conn_idx ].fd, conn->response.status ));
617 : #endif
618 :
619 0 : if( FD_LIKELY( !conn->response.static_body ) ) conn_treap_ele_insert( http->conn_treap, conn, http->conns );
620 0 : }
621 :
622 : static void
623 : read_conn_ws( fd_http_server_t * http,
624 0 : ulong conn_idx ) {
625 0 : struct fd_http_server_ws_connection * conn = &http->ws_conns[ conn_idx-http->max_conns ];
626 :
627 0 : long sz = read( http->pollfds[ conn_idx ].fd, conn->recv_bytes+conn->recv_bytes_parsed+conn->recv_bytes_read, http->max_ws_recv_frame_len-conn->recv_bytes_parsed-conn->recv_bytes_read );
628 0 : if( FD_UNLIKELY( -1==sz && errno==EAGAIN ) ) return; /* No data to read, continue. */
629 0 : else if( FD_UNLIKELY( !sz || (-1==sz && is_expected_network_error( errno ) ) ) ) {
630 0 : close_conn( http, conn_idx, FD_HTTP_SERVER_CONNECTION_CLOSE_PEER_RESET );
631 0 : return;
632 0 : }
633 0 : else if( FD_UNLIKELY( -1==sz ) ) FD_LOG_ERR(( "read failed (%i-%s)", errno, strerror( errno ) )); /* Unexpected programmer error, abort */
634 :
635 : /* New data was read... process it */
636 0 : conn->recv_bytes_read += (ulong)sz;
637 0 : again:
638 0 : if( FD_UNLIKELY( conn->recv_bytes_read<2UL ) ) return; /* Need at least 2 bytes to determine frame length */
639 :
640 0 : int is_mask_set = conn->recv_bytes[ conn->recv_bytes_parsed+1UL ] & 0x80;
641 0 : if( FD_UNLIKELY( !is_mask_set ) ) {
642 0 : close_conn( http, conn_idx, FD_HTTP_SERVER_CONNECTION_CLOSE_WS_BAD_MASK );
643 0 : return;
644 0 : }
645 :
646 0 : int opcode = conn->recv_bytes[ conn->recv_bytes_parsed ] & 0x0F;
647 0 : if( FD_UNLIKELY( opcode!=0x0 && opcode!=0x1 && opcode!=0x2 && opcode!=0x8 && opcode!=0x9 && opcode!=0xA ) ) {
648 0 : close_conn( http, conn_idx, FD_HTTP_SERVER_CONNECTION_CLOSE_WS_UNKNOWN_OPCODE );
649 0 : return;
650 0 : }
651 :
652 0 : ulong payload_len = conn->recv_bytes[ conn->recv_bytes_parsed+1UL ] & 0x7F;
653 0 : if( FD_UNLIKELY( (payload_len==126 || payload_len==127) && (opcode==0x8 || opcode==0x9 || opcode==0xA) ) ) {
654 0 : close_conn( http, conn_idx, FD_HTTP_SERVER_CONNECTION_CLOSE_WS_CONTROL_FRAME_TOO_LARGE );
655 0 : return;
656 0 : }
657 :
658 0 : ulong len_bytes;
659 0 : if( FD_LIKELY( payload_len<126UL ) ) {
660 0 : len_bytes = 1UL;
661 0 : } else if( FD_LIKELY( payload_len==126 ) ) {
662 0 : if( FD_UNLIKELY( conn->recv_bytes_read<4UL ) ) return; /* Need at least 4 bytes to determine frame length */
663 0 : payload_len = ((ulong)conn->recv_bytes[ conn->recv_bytes_parsed+2UL ]<<8UL) | (ulong)conn->recv_bytes[ conn->recv_bytes_parsed+3UL ];
664 0 : len_bytes = 3UL;
665 0 : } else if( FD_LIKELY( payload_len==127 ) ) {
666 0 : if( FD_UNLIKELY( conn->recv_bytes_read<10UL ) ) return; /* Need at least 10 bytes to determine frame length */
667 0 : payload_len = ((ulong)conn->recv_bytes[ conn->recv_bytes_parsed+2 ]<<56UL) | ((ulong)conn->recv_bytes[ conn->recv_bytes_parsed+3UL ]<<48UL) | ((ulong)conn->recv_bytes[ conn->recv_bytes_parsed+4UL ]<<40UL) | ((ulong)conn->recv_bytes[ conn->recv_bytes_parsed+5UL ]<<32UL) |
668 0 : ((ulong)conn->recv_bytes[ conn->recv_bytes_parsed+6 ]<<24UL) | ((ulong)conn->recv_bytes[ conn->recv_bytes_parsed+7UL ]<<16UL) | ((ulong)conn->recv_bytes[ conn->recv_bytes_parsed+8UL ]<<8UL ) | (ulong)conn->recv_bytes[ conn->recv_bytes_parsed+9UL ];
669 0 : len_bytes = 9UL;
670 0 : } else {
671 0 : FD_LOG_ERR(( "unexpected payload_len %lu", payload_len )); /* Silence clang sanitizer, not possible */
672 0 : }
673 :
674 0 : ulong header_len = 1UL+len_bytes+4UL;
675 0 : ulong frame_len = header_len+payload_len;
676 0 : if( FD_UNLIKELY( frame_len<header_len ) ) { /* Overflow */
677 0 : close_conn( http, conn_idx, FD_HTTP_SERVER_CONNECTION_CLOSE_WS_OVERSIZE_FRAME );
678 0 : return;
679 0 : }
680 :
681 0 : if( FD_UNLIKELY( conn->recv_bytes_parsed+frame_len+1UL>http->max_ws_recv_frame_len ) ) {
682 0 : close_conn( http, conn_idx, FD_HTTP_SERVER_CONNECTION_CLOSE_WS_OVERSIZE_FRAME );
683 0 : return;
684 0 : }
685 :
686 0 : if( FD_UNLIKELY( conn->recv_bytes_read<frame_len ) ) return; /* Need more data to read the full frame */
687 :
688 : /* Data frame, process it */
689 :
690 0 : int is_fin_set = conn->recv_bytes[ conn->recv_bytes_parsed+0UL ] & 0x80;
691 :
692 0 : uchar * mask = conn->recv_bytes+conn->recv_bytes_parsed+1UL+len_bytes;
693 0 : uchar mask_copy[ 4 ] = { mask[ 0 ], mask[ 1 ], mask[ 2 ], mask[ 3 ] }; /* Bytes will be overwritten by the memmove below */
694 :
695 0 : uchar * payload = conn->recv_bytes+conn->recv_bytes_parsed+header_len;
696 0 : for( ulong i=0UL; i<payload_len; i++ ) conn->recv_bytes[ conn->recv_bytes_parsed+i ] = payload[ i ] ^ mask_copy[ i % 4 ];
697 :
698 : /* Frame is complete, process it */
699 :
700 0 : if( FD_UNLIKELY( opcode==0x8 ) ) {
701 0 : close_conn( http, conn_idx, FD_HTTP_SERVER_CONNECTION_CLOSE_PEER_RESET );
702 0 : return;
703 0 : } else if( FD_UNLIKELY( opcode==0x9 ) ) {
704 : /* Ping frame, queue pong unless we are already sending one */
705 0 : if( FD_LIKELY( conn->pong_state!=FD_HTTP_SERVER_PONG_STATE_WAITING ) ) {
706 0 : conn->pong_state = FD_HTTP_SERVER_PONG_STATE_WAITING;
707 0 : conn->pong_data_len = payload_len;
708 0 : FD_TEST( payload_len<=125UL );
709 0 : memcpy( conn->pong_data, conn->recv_bytes+conn->recv_bytes_parsed, payload_len );
710 0 : }
711 0 : if( FD_UNLIKELY( conn->recv_bytes_read-frame_len ) ) {
712 0 : memmove( conn->recv_bytes, conn->recv_bytes+conn->recv_bytes_parsed+frame_len, conn->recv_bytes_read-frame_len );
713 0 : }
714 0 : conn->recv_bytes_parsed = 0UL;
715 0 : conn->recv_bytes_read -= frame_len;
716 0 : return;
717 0 : } else if( FD_UNLIKELY( opcode==0xA ) ) {
718 : /* Pong frame, ignore */
719 0 : if( FD_UNLIKELY( conn->recv_bytes_read-frame_len ) ) {
720 0 : memmove( conn->recv_bytes, conn->recv_bytes+conn->recv_bytes_parsed+frame_len, conn->recv_bytes_read-frame_len );
721 0 : }
722 0 : conn->recv_bytes_parsed = 0UL;
723 0 : conn->recv_bytes_read -= frame_len;
724 0 : return;
725 0 : }
726 :
727 0 : if( FD_UNLIKELY( conn->recv_started_msg && opcode!=0x0 ) ) {
728 0 : close_conn( http, conn_idx, FD_HTTP_SERVER_CONNECTION_CLOSE_WS_EXPECTED_CONT_OPCODE );
729 0 : return;
730 0 : }
731 :
732 0 : if( FD_UNLIKELY( !conn->recv_started_msg && opcode!=0x1 && opcode!=0x2 ) ) {
733 0 : close_conn( http, conn_idx, FD_HTTP_SERVER_CONNECTION_CLOSE_WS_EXPECTED_TEXT_OPCODE );
734 0 : return;
735 0 : }
736 :
737 0 : if( FD_UNLIKELY( conn->recv_started_msg && opcode!=conn->recv_last_opcode ) ) {
738 0 : close_conn( http, conn_idx, FD_HTTP_SERVER_CONNECTION_CLOSE_WS_CHANGED_OPCODE );
739 0 : return;
740 0 : }
741 0 : conn->recv_last_opcode = opcode;
742 :
743 : /* Check if this is a complete message */
744 :
745 0 : if( FD_UNLIKELY( !is_fin_set ) ) {
746 0 : conn->recv_started_msg = 1;
747 0 : conn->recv_bytes_read -= frame_len;
748 0 : conn->recv_bytes_parsed += payload_len;
749 0 : return; /* Not a complete message yet */
750 0 : }
751 :
752 : /* Complete message, process it */
753 :
754 0 : uchar * trailing_data = conn->recv_bytes+conn->recv_bytes_parsed+frame_len;
755 0 : ulong trailing_data_len = conn->recv_bytes_read-frame_len;
756 :
757 0 : conn->recv_bytes_parsed += payload_len;
758 0 : conn->recv_bytes_read -= frame_len;
759 :
760 0 : uchar tmp = conn->recv_bytes[ conn->recv_bytes_parsed ];
761 0 : conn->recv_bytes[ conn->recv_bytes_parsed ] = 0; /* NUL terminate */
762 0 : http->callbacks.ws_message( conn_idx-http->max_conns, conn->recv_bytes, conn->recv_bytes_parsed, http->callback_ctx );
763 0 : if( FD_UNLIKELY( -1==http->pollfds[ conn_idx ].fd ) ) return; /* Connection was closed by callback */
764 0 : conn->recv_bytes[ conn->recv_bytes_parsed ] = tmp;
765 :
766 0 : conn->recv_started_msg = 0;
767 0 : conn->recv_bytes_parsed = 0UL;
768 0 : if( FD_UNLIKELY( trailing_data_len ) ) {
769 0 : memmove( conn->recv_bytes, trailing_data, trailing_data_len );
770 0 : goto again; /* Might be another message in the buffer to process */
771 0 : }
772 0 : }
773 :
774 : static void
775 : read_conn( fd_http_server_t * http,
776 0 : ulong conn_idx ) {
777 0 : if( FD_LIKELY( conn_idx<http->max_conns ) ) read_conn_http( http, conn_idx );
778 0 : else read_conn_ws( http, conn_idx );
779 0 : }
780 :
781 : static void
782 : write_conn_http( fd_http_server_t * http,
783 0 : ulong conn_idx ) {
784 0 : struct fd_http_server_connection * conn = &http->conns[ conn_idx ];
785 :
786 0 : char header_buf[ 1024 ];
787 :
788 0 : uchar const * response;
789 0 : ulong response_len;
790 0 : switch( conn->state ) {
791 0 : case FD_HTTP_SERVER_CONNECTION_STATE_READING:
792 0 : return; /* No data staged for write yet. */
793 0 : case FD_HTTP_SERVER_CONNECTION_STATE_WRITING_HEADER:
794 0 : switch( conn->response.status ) {
795 0 : case 200:
796 0 : if( FD_UNLIKELY( conn->response.upgrade_websocket ) ) {
797 0 : if( FD_UNLIKELY( !conn->upgrade_websocket ) ) {
798 0 : close_conn( http, conn_idx, FD_HTTP_SERVER_CONNECTION_CLOSE_WS_MISSING_UPGRADE );
799 0 : return;
800 0 : }
801 :
802 0 : uchar sec_websocket_key[ 60 ];
803 0 : fd_memcpy( sec_websocket_key, conn->sec_websocket_key, 24 );
804 0 : fd_memcpy( sec_websocket_key+24, "258EAFA5-E914-47DA-95CA-C5AB0DC85B11", 36 );
805 :
806 0 : uchar sec_websocket_accept[ 20 ];
807 0 : fd_sha1_hash( sec_websocket_key, 60, sec_websocket_accept );
808 0 : char sec_websocket_accept_base64[ FD_BASE64_ENC_SZ( 20 ) ];
809 0 : ulong encoded_len = fd_base64_encode( sec_websocket_accept_base64, sec_websocket_accept, 20 );
810 0 : FD_TEST( fd_cstr_printf_check( header_buf, sizeof( header_buf ), &response_len, "HTTP/1.1 101 Switching Protocols\r\nUpgrade: websocket\r\nConnection: Upgrade\r\nSec-WebSocket-Accept: %.*s\r\n", (int)encoded_len, sec_websocket_accept_base64 ) );
811 0 : } else {
812 0 : ulong body_len = conn->response.static_body ? conn->response.static_body_len : conn->response._body_len;
813 0 : FD_TEST( fd_cstr_printf_check( header_buf, sizeof( header_buf ), &response_len, "HTTP/1.1 200 OK\r\nContent-Length: %lu\r\nConnection: close\r\n", body_len ) );
814 0 : }
815 0 : break;
816 0 : case 204: {
817 0 : ulong body_len = conn->response.static_body ? conn->response.static_body_len : conn->response._body_len;
818 0 : FD_TEST( fd_cstr_printf_check( header_buf, sizeof( header_buf ), &response_len, "HTTP/1.1 204 No Content\r\nContent-Length: %lu\r\n", body_len ) );
819 0 : break;
820 0 : }
821 0 : case 400: {
822 0 : ulong body_len = conn->response.static_body ? conn->response.static_body_len : conn->response._body_len;
823 0 : FD_TEST( fd_cstr_printf_check( header_buf, sizeof( header_buf ), &response_len, "HTTP/1.1 400 Bad Request\r\nContent-Length: %lu\r\n", body_len ) );
824 0 : break;
825 0 : }
826 0 : case 404:
827 0 : FD_TEST( fd_cstr_printf_check( header_buf, sizeof( header_buf ), &response_len, "HTTP/1.1 404 Not Found\r\nContent-Length: 0\r\n" ) );
828 0 : break;
829 0 : case 405:
830 0 : FD_TEST( fd_cstr_printf_check( header_buf, sizeof( header_buf ), &response_len, "HTTP/1.1 405 Method Not Allowed\r\nContent-Length: 0\r\n" ) );
831 0 : break;
832 0 : case 500:
833 0 : FD_TEST( fd_cstr_printf_check( header_buf, sizeof( header_buf ), &response_len, "HTTP/1.1 500 Internal Server Error\r\nContent-Length: 0\r\n" ) );
834 0 : break;
835 0 : default:
836 0 : FD_TEST( fd_cstr_printf_check( header_buf, sizeof( header_buf ), &response_len, "HTTP/1.1 500 Internal Server Error\r\nContent-Length: 0\r\n" ) );
837 0 : break;
838 0 : }
839 :
840 0 : if( FD_LIKELY( conn->response.content_type ) ) {
841 0 : ulong content_type_len;
842 0 : FD_TEST( fd_cstr_printf_check( header_buf+response_len, sizeof( header_buf )-response_len, &content_type_len, "Content-Type: %s\r\n", conn->response.content_type ) );
843 0 : response_len += content_type_len;
844 0 : }
845 0 : if( FD_LIKELY( conn->response.cache_control ) ) {
846 0 : ulong cache_control_len;
847 0 : FD_TEST( fd_cstr_printf_check( header_buf+response_len, sizeof( header_buf )-response_len, &cache_control_len, "Cache-Control: %s\r\n", conn->response.cache_control ) );
848 0 : response_len += cache_control_len;
849 0 : }
850 0 : if( FD_LIKELY( conn->response.content_encoding ) ) {
851 0 : ulong content_encoding_len;
852 0 : FD_TEST( fd_cstr_printf_check( header_buf+response_len, sizeof( header_buf )-response_len, &content_encoding_len, "Content-Encoding: %s\r\n", conn->response.content_encoding ) );
853 0 : response_len += content_encoding_len;
854 0 : }
855 0 : if( FD_LIKELY( conn->response.access_control_allow_origin ) ) {
856 0 : ulong access_control_allow_origin_len;
857 0 : FD_TEST( fd_cstr_printf_check( header_buf+response_len, sizeof( header_buf )-response_len, &access_control_allow_origin_len, "Access-Control-Allow-Origin: %s\r\n", conn->response.access_control_allow_origin ) );
858 0 : response_len += access_control_allow_origin_len;
859 0 : }
860 0 : if( FD_LIKELY( conn->response.access_control_allow_methods ) ) {
861 0 : ulong access_control_allow_methods_len;
862 0 : FD_TEST( fd_cstr_printf_check( header_buf+response_len, sizeof( header_buf )-response_len, &access_control_allow_methods_len, "Access-Control-Allow-Methods: %s\r\n", conn->response.access_control_allow_methods ) );
863 0 : response_len += access_control_allow_methods_len;
864 0 : }
865 0 : if( FD_LIKELY( conn->response.access_control_allow_headers ) ) {
866 0 : ulong access_control_allow_headers_len;
867 0 : FD_TEST( fd_cstr_printf_check( header_buf+response_len, sizeof( header_buf )-response_len, &access_control_allow_headers_len, "Access-Control-Allow-Headers: %s\r\n", conn->response.access_control_allow_headers ) );
868 0 : response_len += access_control_allow_headers_len;
869 0 : }
870 0 : if( FD_LIKELY( conn->response.access_control_max_age ) ) {
871 0 : ulong access_control_max_age_len;
872 0 : FD_TEST( fd_cstr_printf_check( header_buf+response_len, sizeof( header_buf )-response_len, &access_control_max_age_len, "Access-Control-Max-Age: %lu\r\n", conn->response.access_control_max_age ) );
873 0 : response_len += access_control_max_age_len;
874 0 : }
875 0 : FD_TEST( fd_cstr_printf_check( header_buf+response_len, sizeof( header_buf )-response_len, NULL, "\r\n" ) );
876 0 : response_len += 2UL;
877 :
878 0 : response = (uchar const *)header_buf;
879 0 : break;
880 0 : case FD_HTTP_SERVER_CONNECTION_STATE_WRITING_BODY:
881 0 : if( FD_UNLIKELY( conn->response.static_body ) ) {
882 0 : response = conn->response.static_body;
883 0 : response_len = conn->response.static_body_len;
884 0 : } else {
885 0 : response = http->oring+(conn->response._body_off%http->oring_sz);
886 0 : response_len = conn->response._body_len;
887 0 : }
888 0 : break;
889 0 : default:
890 0 : FD_LOG_ERR(( "invalid server state (%d)", conn->state ));
891 0 : }
892 :
893 0 : long sz = send( http->pollfds[ conn_idx ].fd, response+conn->response_bytes_written, response_len-conn->response_bytes_written, MSG_NOSIGNAL );
894 0 : if( FD_UNLIKELY( -1==sz && errno==EAGAIN ) ) return; /* No data was written, continue. */
895 0 : if( FD_UNLIKELY( -1==sz && is_expected_network_error( errno ) ) ) {
896 0 : close_conn( http, conn_idx, FD_HTTP_SERVER_CONNECTION_CLOSE_PEER_RESET );
897 0 : return;
898 0 : }
899 0 : if( FD_UNLIKELY( -1==sz ) ) FD_LOG_ERR(( "write failed (%i-%s)", errno, strerror( errno ) )); /* Unexpected programmer error, abort */
900 :
901 0 : conn->response_bytes_written += (ulong)sz;
902 0 : if( FD_UNLIKELY( conn->response_bytes_written==response_len ) ) {
903 0 : switch( conn->state ) {
904 0 : case FD_HTTP_SERVER_CONNECTION_STATE_WRITING_HEADER:
905 0 : if( FD_UNLIKELY( conn->response.upgrade_websocket ) ) {
906 0 : if( FD_UNLIKELY( !conn->upgrade_websocket ) ) {
907 0 : close_conn( http, conn_idx, FD_HTTP_SERVER_CONNECTION_CLOSE_WS_MISSING_UPGRADE );
908 0 : return;
909 0 : }
910 :
911 0 : int fd = http->pollfds[ conn_idx ].fd;
912 0 : http->pollfds[ conn_idx ].fd = -1;
913 :
914 0 : struct fd_http_server_connection * conn = &http->conns[ conn_idx ];
915 0 : if( FD_LIKELY( !conn->response.static_body ) ) conn_treap_ele_remove( http->conn_treap, conn, http->conns );
916 0 : conn_pool_ele_release( http->conns, conn );
917 :
918 0 : if( FD_UNLIKELY( !ws_conn_pool_free( http->ws_conns ) ) ) {
919 0 : ws_conn_treap_rev_iter_t it = ws_conn_treap_rev_iter_init( http->ws_conn_treap, http->ws_conns );
920 0 : if( FD_LIKELY( !ws_conn_treap_rev_iter_done( it ) ) ) {
921 0 : ulong ws_conn_id = ws_conn_treap_rev_iter_idx( it );
922 0 : close_conn( http, http->max_conns+ws_conn_id, FD_HTTP_SERVER_CONNECTION_CLOSE_EVICTED );
923 0 : } else {
924 0 : close_conn( http, http->max_conns+http->evict_ws_conn_id, FD_HTTP_SERVER_CONNECTION_CLOSE_EVICTED );
925 0 : http->evict_ws_conn_id = (http->evict_ws_conn_id+1UL) % http->max_ws_conns;
926 0 : }
927 0 : }
928 :
929 0 : ulong ws_conn_id = ws_conn_pool_idx_acquire( http->ws_conns );
930 0 : http->pollfds[ http->max_conns+ws_conn_id ].fd = fd;
931 :
932 0 : http->ws_conns[ ws_conn_id ].pong_state = FD_HTTP_SERVER_PONG_STATE_NONE;
933 0 : http->ws_conns[ ws_conn_id ].send_frame_cnt = 0UL;
934 0 : http->ws_conns[ ws_conn_id ].send_frame_state = FD_HTTP_SERVER_SEND_FRAME_STATE_HEADER;
935 0 : http->ws_conns[ ws_conn_id ].send_frame_idx = 0UL;
936 0 : http->ws_conns[ ws_conn_id ].recv_started_msg = 0;
937 0 : http->ws_conns[ ws_conn_id ].recv_bytes_parsed = 0UL;
938 0 : http->ws_conns[ ws_conn_id ].recv_bytes_read = 0UL;
939 0 : http->ws_conns[ ws_conn_id ].send_frame_bytes_written = 0UL;
940 :
941 0 : FD_TEST( conn->request_bytes_read>=conn->request_bytes_len );
942 0 : if( FD_UNLIKELY( conn->request_bytes_read-conn->request_bytes_len>0UL ) ) {
943 : /* Client might have already started sending data prior to
944 : response, so make sure to move it to the recv buffer. */
945 0 : FD_TEST( conn->request_bytes_read-conn->request_bytes_len<=http->max_ws_recv_frame_len );
946 0 : fd_memcpy( http->ws_conns[ ws_conn_id ].recv_bytes, conn->request_bytes+conn->request_bytes_len, conn->request_bytes_read-conn->request_bytes_len );
947 0 : http->ws_conns[ ws_conn_id ].recv_bytes_read = conn->request_bytes_read-conn->request_bytes_len;
948 0 : }
949 :
950 : #if FD_HTTP_SERVER_DEBUG
951 : FD_LOG_WARNING(( "Upgraded connection %lu (fd=%d) to websocket connection %lu", conn_idx, fd, ws_conn_id ));
952 : #endif
953 :
954 0 : if( FD_LIKELY( http->callbacks.ws_open ) ) http->callbacks.ws_open( ws_conn_id, http->callback_ctx );
955 0 : } else {
956 0 : conn->state = FD_HTTP_SERVER_CONNECTION_STATE_WRITING_BODY;
957 0 : conn->response_bytes_written = 0UL;
958 0 : }
959 0 : break;
960 0 : case FD_HTTP_SERVER_CONNECTION_STATE_WRITING_BODY:
961 0 : close_conn( http, conn_idx, FD_HTTP_SERVER_CONNECTION_CLOSE_OK );
962 0 : break;
963 0 : }
964 0 : }
965 0 : }
966 :
967 : static int
968 : maybe_write_pong( fd_http_server_t * http,
969 0 : ulong conn_idx ) {
970 0 : struct fd_http_server_ws_connection * conn = &http->ws_conns[ conn_idx-http->max_conns ];
971 :
972 : /* No need to pong if ....
973 :
974 : Client has not sent a ping */
975 0 : if( FD_LIKELY( conn->pong_state==FD_HTTP_SERVER_PONG_STATE_NONE ) ) return 0;
976 : /* We are in the middle of writing a data frame */
977 0 : if( FD_LIKELY( conn->send_frame_cnt && (conn->send_frame_state==FD_HTTP_SERVER_SEND_FRAME_STATE_DATA || conn->send_frame_bytes_written ) ) ) return 0;
978 :
979 : /* Otherwise, we need to pong */
980 0 : if( FD_LIKELY( conn->pong_state==FD_HTTP_SERVER_PONG_STATE_WAITING ) ) {
981 0 : conn->pong_state = FD_HTTP_SERVER_PONG_STATE_WRITING;
982 0 : conn->pong_bytes_written = 0UL;
983 0 : }
984 :
985 0 : uchar frame[ 2UL+125UL ];
986 0 : frame[ 0 ] = 0x80 | 0x0A; /* FIN, 0xA for pong. */
987 0 : frame[ 1 ] = (uchar)conn->pong_data_len;
988 0 : fd_memcpy( frame+2UL, conn->pong_data, conn->pong_data_len );
989 :
990 0 : long sz = send( http->pollfds[ conn_idx ].fd, frame+conn->pong_bytes_written, 2UL+conn->pong_data_len-conn->pong_bytes_written, MSG_NOSIGNAL );
991 0 : if( FD_UNLIKELY( -1==sz && errno==EAGAIN ) ) return 1; /* No data was written, continue. */
992 0 : else if( FD_UNLIKELY( -1==sz && is_expected_network_error( errno ) ) ) {
993 0 : close_conn( http, conn_idx, FD_HTTP_SERVER_CONNECTION_CLOSE_PEER_RESET );
994 0 : return 1;
995 0 : }
996 0 : else if( FD_UNLIKELY( -1==sz ) ) FD_LOG_ERR(( "write failed (%i-%s)", errno, strerror( errno ) )); /* Unexpected programmer error, abort */
997 :
998 0 : conn->pong_bytes_written += (ulong)sz;
999 0 : if( FD_UNLIKELY( conn->pong_bytes_written==2UL+conn->pong_data_len ) ) {
1000 0 : conn->pong_state = FD_HTTP_SERVER_PONG_STATE_NONE;
1001 0 : return 0;
1002 0 : }
1003 :
1004 0 : return 1;
1005 0 : }
1006 :
1007 : static void
1008 : write_conn_ws( fd_http_server_t * http,
1009 0 : ulong conn_idx ) {
1010 0 : struct fd_http_server_ws_connection * conn = &http->ws_conns[ conn_idx-http->max_conns ];
1011 :
1012 0 : if( FD_UNLIKELY( maybe_write_pong( http, conn_idx ) ) ) return;
1013 0 : if( FD_UNLIKELY( !conn->send_frame_cnt ) ) return;
1014 :
1015 0 : fd_http_server_ws_frame_t * frame = &conn->send_frames[ conn->send_frame_idx ];
1016 0 : switch( conn->send_frame_state ) {
1017 0 : case FD_HTTP_SERVER_SEND_FRAME_STATE_HEADER: {
1018 0 : uchar header[ 10 ];
1019 0 : ulong header_len;
1020 0 : header[ 0 ] = 0x80 | 0x01; /* FIN, 0x1 for text. */
1021 0 : if( FD_LIKELY( frame->len<126UL ) ) {
1022 0 : header[ 1 ] = (uchar)frame->len;
1023 0 : header_len = 2UL;
1024 0 : } else if( FD_LIKELY( frame->len<65536UL ) ) {
1025 0 : header[ 1 ] = 126;
1026 0 : header[ 2 ] = (uchar)(frame->len>>8);
1027 0 : header[ 3 ] = (uchar)(frame->len);
1028 0 : header_len = 4UL;
1029 0 : } else {
1030 0 : header[ 1 ] = 127;
1031 0 : header[ 2 ] = (uchar)(frame->len>>56);
1032 0 : header[ 3 ] = (uchar)(frame->len>>48);
1033 0 : header[ 4 ] = (uchar)(frame->len>>40);
1034 0 : header[ 5 ] = (uchar)(frame->len>>32);
1035 0 : header[ 6 ] = (uchar)(frame->len>>24);
1036 0 : header[ 7 ] = (uchar)(frame->len>>16);
1037 0 : header[ 8 ] = (uchar)(frame->len>>8);
1038 0 : header[ 9 ] = (uchar)(frame->len);
1039 0 : header_len = 10UL;
1040 0 : }
1041 :
1042 0 : long sz = send( http->pollfds[ conn_idx ].fd, header+conn->send_frame_bytes_written, header_len-conn->send_frame_bytes_written, MSG_NOSIGNAL );
1043 0 : if( FD_UNLIKELY( -1==sz && errno==EAGAIN ) ) return; /* No data was written, continue. */
1044 0 : else if( FD_UNLIKELY( -1==sz && is_expected_network_error( errno ) ) ) {
1045 0 : close_conn( http, conn_idx, FD_HTTP_SERVER_CONNECTION_CLOSE_PEER_RESET );
1046 0 : return;
1047 0 : }
1048 0 : else if( FD_UNLIKELY( -1==sz ) ) FD_LOG_ERR(( "write failed (%i-%s)", errno, strerror( errno ) )); /* Unexpected programmer error, abort */
1049 :
1050 0 : conn->send_frame_bytes_written += (ulong)sz;
1051 0 : if( FD_UNLIKELY( conn->send_frame_bytes_written==header_len ) ) {
1052 0 : conn->send_frame_state = FD_HTTP_SERVER_SEND_FRAME_STATE_DATA;
1053 0 : conn->send_frame_bytes_written = 0UL;
1054 0 : }
1055 0 : break;
1056 0 : }
1057 0 : case FD_HTTP_SERVER_SEND_FRAME_STATE_DATA: {
1058 0 : uchar const * data = http->oring+(frame->off%http->oring_sz);
1059 0 : long sz = send( http->pollfds[ conn_idx ].fd, data+conn->send_frame_bytes_written, frame->len-conn->send_frame_bytes_written, MSG_NOSIGNAL );
1060 0 : if( FD_UNLIKELY( -1==sz && errno==EAGAIN ) ) return; /* No data was written, continue. */
1061 0 : else if( FD_UNLIKELY( -1==sz && is_expected_network_error( errno ) ) ) {
1062 0 : close_conn( http, conn_idx, FD_HTTP_SERVER_CONNECTION_CLOSE_PEER_RESET );
1063 0 : return;
1064 0 : }
1065 0 : else if( FD_UNLIKELY( -1==sz ) ) FD_LOG_ERR(( "write failed (%i-%s)", errno, strerror( errno ) )); /* Unexpected programmer error, abort */
1066 :
1067 0 : conn->send_frame_bytes_written += (ulong)sz;
1068 0 : if( FD_UNLIKELY( conn->send_frame_bytes_written==frame->len ) ) {
1069 0 : conn->send_frame_state = FD_HTTP_SERVER_SEND_FRAME_STATE_HEADER;
1070 0 : conn->send_frame_idx = (conn->send_frame_idx+1UL) % http->max_ws_send_frame_cnt;
1071 0 : conn->send_frame_cnt--;
1072 0 : conn->send_frame_bytes_written = 0UL;
1073 :
1074 0 : ws_conn_treap_ele_remove( http->ws_conn_treap, conn, http->ws_conns );
1075 0 : if( FD_LIKELY( conn->send_frame_cnt ) ) ws_conn_treap_ele_insert( http->ws_conn_treap, conn, http->ws_conns );
1076 0 : }
1077 0 : break;
1078 0 : }
1079 0 : }
1080 0 : }
1081 :
1082 : int
1083 : fd_http_server_ws_send( fd_http_server_t * http,
1084 0 : ulong ws_conn_id ) {
1085 0 : struct fd_http_server_ws_connection * conn = &http->ws_conns[ ws_conn_id ];
1086 :
1087 0 : if( FD_UNLIKELY( http->stage_err ) ) {
1088 0 : http->stage_err = 0;
1089 0 : http->stage_len = 0;
1090 0 : return -1;
1091 0 : }
1092 :
1093 0 : if( FD_UNLIKELY( conn->send_frame_cnt==http->max_ws_send_frame_cnt ) ) {
1094 0 : close_conn( http, ws_conn_id+http->max_conns, FD_HTTP_SERVER_CONNECTION_CLOSE_WS_CLIENT_TOO_SLOW );
1095 0 : return 0;
1096 0 : }
1097 :
1098 0 : fd_http_server_ws_frame_t frame = {
1099 0 : .off = http->stage_off,
1100 0 : .len = http->stage_len,
1101 0 : };
1102 :
1103 0 : conn->send_frames[ (conn->send_frame_idx+conn->send_frame_cnt) % http->max_ws_send_frame_cnt ] = frame;
1104 0 : conn->send_frame_cnt++;
1105 :
1106 0 : if( FD_LIKELY( conn->send_frame_cnt==1UL ) ) {
1107 0 : ws_conn_treap_ele_insert( http->ws_conn_treap, conn, http->ws_conns );
1108 0 : }
1109 :
1110 0 : http->stage_off += http->stage_len;
1111 0 : http->stage_len = 0;
1112 :
1113 0 : return 0;
1114 0 : }
1115 :
1116 : int
1117 0 : fd_http_server_ws_broadcast( fd_http_server_t * http ) {
1118 0 : if( FD_UNLIKELY( http->stage_err ) ) {
1119 0 : http->stage_err = 0;
1120 0 : http->stage_len = 0;
1121 0 : return -1;
1122 0 : }
1123 :
1124 0 : fd_http_server_ws_frame_t frame = {
1125 0 : .off = http->stage_off,
1126 0 : .len = http->stage_len,
1127 0 : };
1128 :
1129 0 : for( ulong i=0UL; i<http->max_ws_conns; i++ ) {
1130 0 : if( FD_LIKELY( http->pollfds[ http->max_conns+i ].fd==-1 ) ) continue;
1131 :
1132 0 : struct fd_http_server_ws_connection * conn = &http->ws_conns[ i ];
1133 0 : if( FD_UNLIKELY( conn->send_frame_cnt==http->max_ws_send_frame_cnt ) ) {
1134 0 : close_conn( http, i+http->max_conns, FD_HTTP_SERVER_CONNECTION_CLOSE_WS_CLIENT_TOO_SLOW );
1135 0 : continue;
1136 0 : }
1137 :
1138 0 : conn->send_frames[ (conn->send_frame_idx+conn->send_frame_cnt) % http->max_ws_send_frame_cnt ] = frame;
1139 0 : conn->send_frame_cnt++;
1140 :
1141 0 : if( FD_LIKELY( conn->send_frame_cnt==1UL ) ) {
1142 0 : ws_conn_treap_ele_insert( http->ws_conn_treap, conn, http->ws_conns );
1143 0 : }
1144 0 : }
1145 :
1146 0 : http->stage_off += http->stage_len;
1147 0 : http->stage_len = 0;
1148 :
1149 0 : return 0;
1150 0 : }
1151 :
1152 : static void
1153 : write_conn( fd_http_server_t * http,
1154 0 : ulong conn_idx ) {
1155 0 : if( FD_LIKELY( conn_idx<http->max_conns ) ) write_conn_http( http, conn_idx );
1156 0 : else write_conn_ws( http, conn_idx );
1157 0 : }
1158 :
1159 : int
1160 : fd_http_server_poll( fd_http_server_t * http,
1161 0 : int poll_timeout ) {
1162 0 : int nfds = poll( http->pollfds, http->max_conns+http->max_ws_conns+1UL, poll_timeout );
1163 0 : if( FD_UNLIKELY( 0==nfds ) ) return 0;
1164 0 : else if( FD_UNLIKELY( -1==nfds && errno==EINTR ) ) return 0;
1165 0 : else if( FD_UNLIKELY( -1==nfds ) ) FD_LOG_ERR(( "poll failed (%i-%s)", errno, strerror( errno ) ));
1166 :
1167 : /* Poll existing connections for new data. */
1168 0 : for( ulong i=0UL; i<http->max_conns+http->max_ws_conns+1UL; i++ ) {
1169 0 : if( FD_UNLIKELY( -1==http->pollfds[ i ].fd ) ) continue;
1170 0 : if( FD_UNLIKELY( i==http->max_conns+http->max_ws_conns ) ) {
1171 0 : accept_conns( http );
1172 0 : } else {
1173 0 : if( FD_LIKELY( http->pollfds[ i ].revents & POLLIN ) ) read_conn( http, i );
1174 0 : if( FD_UNLIKELY( -1==http->pollfds[ i ].fd ) ) continue;
1175 0 : if( FD_LIKELY( http->pollfds[ i ].revents & POLLOUT ) ) write_conn( http, i );
1176 : /* No need to handle POLLHUP, read() will return 0 soon enough. */
1177 0 : }
1178 0 : }
1179 :
1180 0 : return 1;
1181 0 : }
1182 :
1183 : static void
1184 : fd_http_server_evict_until( fd_http_server_t * http,
1185 676779 : ulong off ) {
1186 676779 : conn_treap_fwd_iter_t next;
1187 676779 : for( conn_treap_fwd_iter_t it=conn_treap_fwd_iter_init( http->conn_treap, http->conns ); !conn_treap_fwd_iter_idx( it ); it=next ) {
1188 0 : next = conn_treap_fwd_iter_next( it, http->conns );
1189 0 : struct fd_http_server_connection * conn = conn_treap_fwd_iter_ele( it, http->conns );
1190 :
1191 0 : if( FD_UNLIKELY( conn->response._body_off<off ) ) {
1192 0 : close_conn( http, conn_treap_fwd_iter_idx( it ), FD_HTTP_SERVER_CONNECTION_CLOSE_EVICTED );
1193 0 : } else {
1194 0 : break;
1195 0 : }
1196 0 : }
1197 :
1198 676779 : ws_conn_treap_fwd_iter_t ws_next;
1199 676779 : for( ws_conn_treap_fwd_iter_t it=ws_conn_treap_fwd_iter_init( http->ws_conn_treap, http->ws_conns ); !ws_conn_treap_fwd_iter_idx( it ); it=ws_next ) {
1200 0 : ws_next = ws_conn_treap_fwd_iter_next( it, http->ws_conns );
1201 0 : struct fd_http_server_ws_connection * conn = ws_conn_treap_fwd_iter_ele( it, http->ws_conns );
1202 :
1203 0 : if( FD_UNLIKELY( conn->send_frames[ conn->send_frame_idx ].off<off ) ) {
1204 0 : close_conn( http, ws_conn_treap_fwd_iter_idx( it )+http->max_conns, FD_HTTP_SERVER_CONNECTION_CLOSE_WS_CLIENT_TOO_SLOW );
1205 0 : } else {
1206 0 : break;
1207 0 : }
1208 0 : }
1209 676779 : }
1210 :
1211 : static void
1212 : fd_http_server_reserve( fd_http_server_t * http,
1213 747438 : ulong len ) {
1214 747438 : ulong remaining = http->oring_sz-((http->stage_off%http->oring_sz)+http->stage_len);
1215 747438 : if( FD_UNLIKELY( len>remaining ) ) {
1216 : /* Appending the format string into the hcache would go past the end
1217 : of the buffer... two cases, */
1218 81420 : if( FD_UNLIKELY( http->stage_len+len>http->oring_sz ) ) {
1219 : /* Case 1: The snap is going to be larger than the entire buffer,
1220 : there's no way to fit it even if we evict everything
1221 : else. Mark the hcache as errored and exit. */
1222 :
1223 70659 : FD_LOG_WARNING(( "tried to reserve %lu bytes for an outgoing message which exceeds the entire data size", http->stage_len+len ));
1224 70659 : http->stage_err = 1;
1225 70659 : return;
1226 70659 : } else {
1227 : /* Case 2: The snap can fit if we relocate it to the start of the
1228 : buffer and evict whatever was there. We also evict the
1229 : rest of the buffer behind where the snap was to
1230 : preserve the invariant that snaps are always evicted in
1231 : circular order. */
1232 :
1233 10761 : ulong stage_end = http->stage_off+remaining+http->stage_len+len;
1234 10761 : ulong clamp = fd_ulong_if( stage_end>=http->oring_sz, stage_end-http->oring_sz, 0UL );
1235 10761 : fd_http_server_evict_until( http, clamp );
1236 10761 : memmove( http->oring, http->oring+(http->stage_off%http->oring_sz), http->stage_len );
1237 10761 : http->stage_off += http->stage_len+remaining;
1238 10761 : }
1239 666018 : } else {
1240 : /* The snap can fit in the buffer, we just need to evict whatever
1241 : was there before. */
1242 666018 : ulong stage_end = http->stage_off+http->stage_len+len;
1243 666018 : ulong clamp = fd_ulong_if( stage_end>=http->oring_sz, stage_end-http->oring_sz, 0UL );
1244 666018 : fd_http_server_evict_until( http, clamp );
1245 666018 : }
1246 747438 : }
1247 :
1248 : void
1249 : fd_http_server_stage_trunc( fd_http_server_t * http,
1250 0 : ulong len ) {
1251 0 : http->stage_len = len;
1252 0 : }
1253 :
1254 : ulong
1255 0 : fd_http_server_stage_len( fd_http_server_t * http ) {
1256 0 : return http->stage_len;
1257 0 : }
1258 :
1259 : void
1260 : fd_http_server_printf( fd_http_server_t * http,
1261 : char const * fmt,
1262 1524654 : ... ) {
1263 1524654 : if( FD_UNLIKELY( http->stage_err ) ) return;
1264 :
1265 747438 : va_list ap;
1266 747438 : va_start( ap, fmt );
1267 747438 : ulong printed_len = (ulong)vsnprintf( NULL, 0UL, fmt, ap );
1268 747438 : va_end( ap );
1269 :
1270 747438 : fd_http_server_reserve( http, printed_len );
1271 747438 : if( FD_UNLIKELY( http->stage_err ) ) return;
1272 :
1273 676779 : va_start( ap, fmt );
1274 676779 : vsnprintf( (char *)http->oring+(http->stage_off%http->oring_sz)+http->stage_len,
1275 676779 : INT_MAX, /* We already proved it's going to fit above */
1276 676779 : fmt,
1277 676779 : ap );
1278 676779 : va_end( ap );
1279 :
1280 676779 : http->stage_len += printed_len;
1281 676779 : }
1282 :
1283 : void
1284 : fd_http_server_memcpy( fd_http_server_t * http,
1285 : uchar const * data,
1286 0 : ulong data_len ) {
1287 0 : fd_http_server_reserve( http, data_len );
1288 0 : if( FD_UNLIKELY( http->stage_err ) ) return;
1289 :
1290 0 : fd_memcpy( (char *)http->oring+(http->stage_off%http->oring_sz)+http->stage_len,
1291 0 : data,
1292 0 : data_len );
1293 0 : http->stage_len += data_len;
1294 0 : }
1295 :
1296 : void
1297 6 : fd_http_server_unstage( fd_http_server_t * http ) {
1298 6 : http->stage_err = 0;
1299 6 : http->stage_len = 0UL;
1300 6 : }
1301 :
1302 : int
1303 : fd_http_server_stage_body( fd_http_server_t * http,
1304 95244 : fd_http_server_response_t * response ) {
1305 95244 : if( FD_UNLIKELY( http->stage_err ) ) {
1306 70659 : http->stage_err = 0;
1307 70659 : http->stage_len = 0;
1308 70659 : return -1;
1309 70659 : }
1310 :
1311 24585 : response->_body_off = http->stage_off;
1312 24585 : response->_body_len = http->stage_len;
1313 24585 : http->stage_off += http->stage_len;
1314 24585 : http->stage_len = 0;
1315 24585 : return 0;
1316 95244 : }
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