-
Notifications
You must be signed in to change notification settings - Fork 0
/
libex_http_server.c
executable file
·726 lines (581 loc) · 25.6 KB
/
libex_http_server.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
/* -------------------------------------------------------------------------- */
/* (c) ali@balarabe.com [libex_http_server.c] */
/* -------------------------------------------------------------------------- */
#include "libex_c_precompiled.h"
#include "libex_http_server_.h"
#if defined INCLUDED_LIBEX_HTTP_SERVER_H
#include "libex_config_.h"
#include <limits.h>
#include <stdio.h> /* for printf() */
#include <stdlib.h> /* for exit() */
#include <string.h> /* for memset() */
#if PLATFORM_LINUX
#include <error.h>
#include <pthread.h>
#endif
#if PLATFORM_WIN32
#include <winsock2.h> /* Windows API */
#include <process.h> /* threads */
#endif
#include "libex_.h"
#include "libex_bytes_.h"
#include "libex_call_.h"
#include "libex_const_.h"
#include "libex_debug_.h"
#include "libex_error_.h"
#include "libex_logging_.h"
#include "libex_macro_.h"
#include "libex_network_.h"
#include "libex_stringc_.h"
#include "libex_system_.h"
#include "libex_type_.h"
#if defined __cplusplus_cli
#pragma unmanaged
#endif
#if defined _MSC_VER
#pragma warning (disable:4710) /* W:L4 function not inlined */
#pragma warning (disable:4820) /* W:L4 'N' bytes padding added after 'NAME' */
/* TODO: remove this later, once utf8 encoding is used everywhere */
#pragma warning (disable:4133) /* W:L3 incompatible types - from T1 to T2 */
#endif
#define _DOC_NOT_FOUND \
"<!DOCTYPE html PUBLIC '-//w3c//dtd xhtml 1.0 transitional//en'" \
" 'http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd'>" \
"<html xmlns='http://www.w3.org/1999/xhtml'>" \
"<head><title>E404</title></head>" \
"<body bgcolor='#ffffff'>" \
"<div style='position: absolute; left: 55px; width: 350px;" \
" top: 55px; height: 85px; background-color: #FF3300;" \
" font-family: Arial, Helvetica, sans-serif;" \
" font-size: xx-large; font-weight: bolder;" \
" color: #FFFFFF;' align='center'>" \
"404: That page was not found! *</div>" \
"<div style='position: absolute; left: 55px; width: 350px;" \
" top: 150px; font-family: Arial, Helvetica, sans-serif;" \
" font-weight: bolder; color: #FF3300;' align='center'>" \
"* However the server is responding.</div>" \
"</body></html>" /*#*/
/* -------------------------------------------------------------------------- */
NAMESPACE(c_)
typedef struct _http_server_t {
bool running_server; /* _http_server_t */
int listen_port; /* _http_server_t */
socket_t server_sock; /* _http_server_t */
HttpServer_callback_fn(http_get_handler_fn); /* _http_server_t */
/* TODO: array of requests? */
}
_http_server_t;
/* -------------------------------------------------------------------------- */
/* Functions: Private */
#define _BASE_OBJ_WRAP_INC
#define _OBJ_HANDLE_TYPE HttpServer
#define _OBJ_INNER_TYPE _http_server_t
#define _OBJ_ALLOC_FN_UID UID(F293F7)
#define _OBJ_FREE_FN_UID UID(F6E0C0)
#define _OBJ_CONST_FN_UID UID(FF76AF)
#define _OBJ_FN_UID UID(FF35EC)
#define _OBJ_WRAP_FN_UID UID(F0D3C4)
#include "libex_object_wrapper.inc.c"
typedef struct _client_thread_args_t {
_http_server_t* server; /* _client_thread_args_t */
socket_t client_sock; /* _client_thread_args_t */
bool args_read; /* _client_thread_args_t */
}
_client_thread_args_t;
/* -------------------------------------------------------------------------- */
/* Functions: Private General-Purpose */
#if PLATFORM_LINUX
#define _ERRNO errno
#endif
#if PLATFORM_WIN32
#define _ERRNO WSAGetLastError_win()
#endif
#define _net_warn( SYSTEM_FN_NAME_, SRC_UID_ ) \
_net_warn_fn(SRC_UID_, FN_NAME_A, SYSTEM_FN_NAME_, _ERRNO) /*#*/
static void _net_warn_fn( /*F*/
const uint32_t src_uid_, /*-*/
chars_t source_func_, /*-*/
const char* system_func_, /*-*/
const int error_no_ ) { /*-*/
GO (UID(F9E641));
#if PLATFORM_LINUX
error(0, error_no_, "-> %s() -> %s. UID(%6X).", source_func_,
system_func_, src_uid_);
#endif /* PLATFORM_LINUX */
#if PLATFORM_WIN32
if (error_no_ != WSAECONNRESET_win) {
new_chars_t err = formatT(_T("%s error: %d - %s"),
system_func_, error_no_,
net_error_name(error_no_));
log_warn(err, source_func_, src_uid_, NULL);
freeT(&err);
}
#endif /* PLATFORM_WIN32 */
RETURN(NIL);
} /* _net_warn_fn */
static socket_t _socket_create_listener( const int port_ ) { /*F*/
GO (UID(FAEDEA));
socket_t ret = 0;
/* create the server socket */
ret = _SOCKET(AF_INET, SOCK_STREAM, 0);
if (ret == INVALID_SOCKET) {
WARN(_T("server_sock == INVALID_SOCKET"), UID(E1A2D0));
RETURN(ret);
}
{
/* set socket option to allow local address reuse: */
int reuse_address = 1;
const int result = SETSOCKOPT(
ret, /* socket */
SOL_SOCKET, /* level */
SO_REUSEADDR, /* optname */
CAST(void*, &reuse_address), /* optval */
sizeof(reuse_address)); /* optlen */
ASSERT(result == 0, UID(E82573));
}
{
/* connect the server socket to the local address and port: */
struct sockaddr_in listen_address;
CLEAR(listen_address);
listen_address.sin_family = AF_INET; /* always AF_INET */
listen_address.sin_addr.s_addr = HTONL(INADDR_ANY); /* type */
listen_address.sin_port = HTONS(CAST(uint16_t, port_));
{
/* on Linux, bind() returns -1 and sets 'errno' */
const int result =
BIND(ret, CAST(struct sockaddr*, &listen_address),
sizeof(listen_address));
if (result != 0) {
_net_warn(_T("BIND()"), UID(E0FB43));
ret = INVALID_SOCKET;
RETURN(ret);
}
}
}
/* put the socket into 'listen' mode to get */
/* incoming connections from clients */
if (LISTEN(ret, 25) != 0) {
_net_warn(_T("LISTEN()"), UID(EFA065));
}
RETURN(ret);
} /* _socket_create_listener */
static bool _socket_is_readable_or_bad( const socket_t socket_ ) { /*F*/
GO (UID(FBE90A));
int count = 0;
struct timeval timeout = { 0, 100 }; /* seconds and microseconds */
fd_set sockets;
FD_ZERO(&sockets);
#if defined _MSC_VER
#pragma warning (push)
#pragma warning (disable:4127) /* W:L4 conditional expression is constant */
#endif
FD_SET(socket_, &sockets);
#if defined _MSC_VER
#pragma warning (pop)
#endif
count = SELECT(
socket_ + 1, /* Max FD in set + 1. (Ignored on Windows) */
&sockets, /* set of sockets to check for readability */
NULL, /* set of sockets to check for writability */
NULL, /* set of sockets to check for errors */
&timeout); /* maximum time to wait */
if (count == SOCKET_ERROR) {
#if PLATFORM_LINUX
const int err_no = errno;
const bool report_err = (errno != EBADF);
#endif /* PLATFORM_LINUX */
#if PLATFORM_WIN32
const int err_no = WSAGetLastError_win();
const bool report_err = (err_no != WSAENOTSOCK_win &&
err_no != WSAECONNRESET_win);
#endif /* PLATFORM_WIN32 */
if (report_err) {
new_chars_t err = formatT(_T("SELECT() error: %d - %s"),
err_no, net_error_name(err_no));
WARN(err, UID(EBD5C6));
freeT(&err);
}
}
{
const bool ret = (count > 0 && count != SOCKET_ERROR);
RETURN(ret);
}
} /* _socket_is_readable_or_bad */
static new_bytes_t _socket_receive( const socket_t socket_ ) { /*F*/
GO (UID(F2281C));
const size_t MAX_MESSAGE_SIZE = MB(16);
const size_t CHUNK_SIZE = KB(16);
int recv_total = 0; /* total number of bytes received */
int recv = 0; /* number of bytes received on last read */
/* prepare buffer which holds the complete received message */
new_bytes_t ret = { 0, NULL };
ret.size = CHUNK_SIZE;
ret.data = MALLOC(ret.size);
MEMSET(ret.data, 0x00, ret.size);
/* keep receiving and adding data to the buffer, until there's no more */
do {
/* re-allocate the buffer if it's too small for extra data */
if ((recv_total + CHUNK_SIZE) > ret.size) {
size_t new_size = ret.size * 2;
if (new_size > MAX_MESSAGE_SIZE) {
new_size = MAX_MESSAGE_SIZE;
}
{
uint8_t* new_buf = REALLOC(ret.data, new_size);
if (new_buf != NULL) {
ret.data = new_buf;
ret.size = new_size;
}
}
}
/* receive and append server's request to the buffer */
recv = RECV(socket_, ret.data + recv_total, CHUNK_SIZE, 0);
if (recv == SOCKET_ERROR) {
#if PLATFORM_LINUX
printf("recv == SOCKET_ERROR\n");;;
#endif
#if PLATFORM_WIN32
const int err_no = WSAGetLastError_win();
/* the virtual circuit was reset by the remote side */
/* executing a hard or abortive close. The application */
/* should close the socket as it is no longer usable. */
if (err_no == WSAECONNRESET_win) {
recv = 0;
}
if (err_no == WSAECONNABORTED_win) {
recv = 0;
} else
#endif /* PLATFORM_WIN32 */
{
/* the socket will be closed by closesocket(); */
_net_warn(_T("RECV()"), UID(E6FE98));
}
} else if (recv > 0) {
recv_total += recv;
if (recv_total > CAST(int, MAX_MESSAGE_SIZE)) {
log_warn(_T("Request is too long"), FN_NAME, UID(E4E247), NULL);
if (ret.data) {
Bytes_free(&ret);
ret.data = NULL;
}
ret.size = 0;
RETURN(ret);
}
} else {
continue; /* go back to fetch data, if none received yet */
}
sleep_ms(50); /* wait for 50ms, exit if no more incoming data */
{
unsigned long bytes_to_read = 0;
int result = 0;
#if PLATFORM_WIN32
result = ioctlsocket_win(socket_, FIONREAD, &bytes_to_read);
#endif
if (bytes_to_read == 0 || result != 0) {
break;
}
}
} while (recv != 0 && recv != SOCKET_ERROR);
Bytes_resize(&ret, recv_total);
RETURN(ret);
} /* _socket_receive */
static bool _socket_send_bytes( /*F*/
const socket_t socket_, /*-*/
const bytes_t send_data_ ) { /*-*/
GO (UID(FD96FE));
printf(">>> _socket_send_bytes() A\n");;;
#if 000 /* debugging stuff */
DUMP_OPEN;
{
new_chars_t bytes = Bytes_describeT(send_data_);
DUMP(_T("\n----------------------------\n")
_T(" _SOCKET %d SENDING = %s"), socket_, bytes);
freeT(&bytes);
}
DUMP_CLOSE;
#endif /* 000 */
{
const int result = SEND(socket_,
CAST(char*, send_data_.data),
CAST(int, send_data_.size), 0);
if (result == SOCKET_ERROR) {
#if PLATFORM_WIN32
const int err_no = WSAGetLastError_win();
if (err_no != WSAECONNABORTED_win) {
_net_warn(_T("SEND()"), UID(E4CA10));
}
#endif /* PLATFORM_WIN32 */
printf("<<< _socket_send_bytes() B\n");;;
RETURN(false);
}
}
printf("<<< _socket_send_bytes() C\n");;;
RETURN(true);
} /* _socket_send_bytes */
/* -------------------------------------------------------------------------- */
static new_http_request_t _parse_received_bytes( /*F*/
const bytes_t received_data_ ) { /*-*/
GO (UID(F6E353));
http_request_t ret;
CLEAR(ret);
ret.recv_data = Tutf8(CAST(const char*, received_data_.data));
{
size_t delim_pos = find2T(ret.recv_data, "\r\n\r\n");
size_t delim_len = 4;
{
const size_t pos = find2T(ret.recv_data, _T("\r\r"));
if (delim_pos != NONE &&
pos != NONE &&
pos < delim_pos) {
delim_pos = pos;
delim_len = 2;
}
}
ret.recv_header = T_first(ret.recv_data, delim_pos);
ret.recv_command = T_get_token(ret.recv_header, 0, _T(" "));
ret.recv_url = T_get_token(ret.recv_header, 1, _T(" "));
upper_in_T(ret.recv_command);
while (beginsT(ret.recv_url, _T("/")) ||
ends2T(ret.recv_url, _T("/"))) {
trim4_in_T(ret.recv_url, _T("/"), true, true);
}
ret.recv_body = T_offset(ret.recv_data, delim_pos + delim_len);
trim_in_T(ret.recv_body);
}
RETURN(ret);
} /* _parse_received_bytes */
static void _closesocket( socket_t* socket_ ) { /*F*/
GO (UID(F9A9C7));
#if PLATFORM_LINUX
if (0 != close(*socket_)) {
_net_warn("close()", UID(E77C2F));
}
#endif /* PLATFORM_LINUX */
#if PLATFORM_WIN32
if (0 != closesocket_win(*socket_)) {
const int err_no = WSAGetLastError_win();
if (err_no != WSAECONNRESET_win &&
err_no != WSAENOTSOCK_win) {
new_chars_t err = formatT(_T("_closesocket() error: %d - %s"),
err_no, net_error_name(err_no));
WARN(err, UID(E947A3));
freeT(&err);
}
}
#endif /* PLATFORM_WIN32 */
*socket_ = INVALID_SOCKET;
RETURN(NIL);
} /* _closesocket */
static void _free_request( http_request_t* request_ ) { /*F*/
GO (UID(F3F979));
if (request_ != NULL) {
if (request_->recv_header != NULL) {
freeA(&request_->recv_header);
}
if (request_->recv_command != NULL) {
freeA(&request_->recv_command);
}
if (request_->recv_url != NULL) {
freeA(&request_->recv_url);
}
if (request_->recv_body != NULL) {
freeA(&request_->recv_body);
}
if (request_->recv_data != NULL) {
freeA(&request_->recv_data);
}
}
RETURN(NIL);
} /* _free_request */
static THREAD_RETURN_TYPE _client_thread( void* client_thread_args_ ) { /*F*/
GO (UID(FFD30E));
bool keep_running = true;
_client_thread_args_t args;
CLEAR(args);
{
/* 'unbox' arguments: */
_client_thread_args_t* args_ptr = client_thread_args_;
args = *args_ptr;
args_ptr->args_read = true;
}
net_start(UID(EAC944));
do {
new_bytes_t received = _socket_receive(args.client_sock);
if (received.size == 0) {
break;
} else {
new_http_request_t request = _parse_received_bytes(received);
new_bytes_t reply = { 0, NULL };
bool const_reply = false;
const char* mime = mime_type(request.recv_url);
{
const int received_size = CAST(int, received.size);
printf("\n\n>>> ------------------->\n header=(%d bytes) %s\n",
received_size, request.recv_header);;;
}
#if 000 /* debugging stuff */
DUMP_OPEN;
{
new_chars_t bytes = Bytes_describeT(received);
DUMP(_T("\n----------------------------\n")
_T(" _SOCKET %d RECEIVED = %s"), args.client_sock, bytes);
freeT(&bytes);
}
DUMP_CLOSE;
#endif /* 000 */
/* invoke the HTTP GET handler callback function */
if (args.server->http_get_handler_fn != NULL) {
reply = args.server->http_get_handler_fn(&request);
}
/* if request isn't processed, send boilerplate '404 - Not Found' */
if (reply.size == 0) {
const_reply = true;
mime = _T("text/html");
reply.data = CAST(uint8_t*, _DOC_NOT_FOUND);
reply.size = STRLEN(_DOC_NOT_FOUND);
}
{
/* prepare HTTP headers and send reply */
new_bytes_t header =
Bytes_fromNewChars(
formatA(
"HTTP/1.1 200 OK" "\r\n"
"Connection: keep-alive" "\r\n"
"Content-Type: %s" "\r\n"
"Content-Length: %d" "\r\n" "\r\n",
mime_type, reply.size));
new_bytes_t send = Bytes_join(header, reply);
_socket_send_bytes(args.client_sock, send);
Bytes_free(&send);
Bytes_free(&header);
}
Bytes_free(&received); /* free up memory */
if (!const_reply) {
Bytes_free(&reply);
}
_free_request(&request);
{
/* wait for more data to arrive on the socket */
/* (HTTP 1.1 persistent connection) */
unsigned long time_ms = uptime_ms();
while (5000 > (uptime_ms() - time_ms) &&
!_socket_is_readable_or_bad(
args.client_sock)) {
sleep_ms(50);
}
}
}
} while (keep_running);
if (args.client_sock != INVALID_SOCKET) {
_closesocket(&args.client_sock);
}
net_end(UID(E30B12));
#if PLATFORM_LINUX
RETURN(NULL);
#endif
#if PLATFORM_WIN32
RETURN(NIL);
#endif
} /* _client_thread */
/* -------------------------------------------------------------------------- */
/* Constructor: */
PUBLIC HttpServer HttpServer_init( void ) { /*C*/
GO (UID(CD1F62));
_http_server_t* ob = _object_alloc();
new_HttpServer ret = _object_wrap(ob);
ob->listen_port = 0;
net_start(UID(E1A42F));
RETURN(ret);
} /* HttpServer_init */
/* -------------------------------------------------------------------------- */
/* Destructor: */
PUBLIC void HttpServer_free( HttpServer* object_ ) { /*D*/
GO (UID(D5042A));
if (object_ != NULL) {
_http_server_t* const me = _object(object_, UID(E863B3));
_closesocket(&me->server_sock);
me->running_server = false;
net_end(UID(EA60F7));
_object_free(object_);
}
RETURN(NIL);
} /* HttpServer_free */
/* -------------------------------------------------------------------------- */
/* Methods: */
PUBLIC void HttpServer_run( /*M*/
HttpServer object_, /*-*/
const int listen_on_port_ ) { /*-*/
GO (UID(FF9A13));
_http_server_t* const me = _object(&object_, UID(E7A740));
me->server_sock = _socket_create_listener(listen_on_port_);
if (me->server_sock == INVALID_SOCKET) {
RETURN(NIL);
}
me->listen_port = listen_on_port_;
me->running_server = true;
while (me->running_server) {
/* wait for a client connection request */
socket_t client_sock = 0;
while (me->running_server && client_sock == 0) {
if (me->running_server &&
_socket_is_readable_or_bad(me->server_sock)) {
struct sockaddr_in client_addr;
int size = sizeof(struct sockaddr_in);
client_sock = ACCEPT(me->server_sock,
CAST(struct sockaddr*, &client_addr),
&size);
}
}
/* start client thread */
if (me->running_server) {
_client_thread_args_t args;
args.server = me;
args.client_sock = client_sock;
args.args_read = false;
{
#if PLATFORM_LINUX
static pthread_t client_thread = 0;
const int result =
pthread_create(&client_thread, /* thread id (out) */
NULL, /* thread attribs. */
_client_thread, /* start routine */
&args); /* pass argument */
/* On success, pthread_create() returns 0; */
/* on error, it returns an error number, */
/* and the contents of *thread are undefined. */
if (result != 0) {
perror("pthread_create() failed"); /* UID(E936A7) */
exit(EXIT_FAILURE);
}
#endif /* PLATFORM_LINUX */
#if PLATFORM_WIN32
const uintptr_t client_thread =
_beginthread(_client_thread, 0, &args);
while (client_thread != CAST(uintptr_t, -1) &&
!args.args_read) {
sleep_ms(20);
}
#endif /* PLATFORM_WIN32 */
}
}
}
printf("_closesocket() C\n");;;
_closesocket(&me->server_sock);
RETURN(NIL);
} /* HttpServer_run */
PUBLIC void HttpServer_setHttpGetHandler( /*M*/
HttpServer object_, /*-*/
HttpServer_callback_fn(callback_fn_) ) { /*-*/
GO (UID(FD19C6));
_http_server_t* const me = _object(&object_, UID(E0FAF8));
me->http_get_handler_fn = callback_fn_;
RETURN(NIL);
} /* HttpServer_setHttpGetHandler */
PUBLIC void HttpServer_stop( HttpServer object_ ) { /*M*/
GO (UID(F74C9F));
_http_server_t* const me = _object(&object_, UID(E6C90D));
me->running_server = false;
RETURN(NIL);
} /* HttpServer_stop */
END_NAMESPACE /*c_*/
#endif /*eof*/