/
tinyhttpd.c
475 lines (442 loc) · 14.2 KB
/
tinyhttpd.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
/*
* tinyhttpd tiny http server
*
* @build make examples
*
* @server bin/tinyhttpd 8000
*
* @client bin/curl -v http://127.0.0.1:8000/
* bin/curl -v http://127.0.0.1:8000/ping
* bin/curl -v http://127.0.0.1:8000/echo -d "hello,world!"
*
* @webbench bin/wrk http://127.0.0.1:8000/ping
*
*/
#include "hv.h"
#include "hloop.h"
/*
* workflow:
* hloop_new -> hloop_create_tcp_server -> hloop_run ->
* on_accept -> HV_ALLOC(http_conn_t) -> hio_readline ->
* on_recv -> parse_http_request_line -> hio_readline ->
* on_recv -> parse_http_head -> ... -> hio_readbytes(content_length) ->
* on_recv -> on_request -> http_reply-> hio_write -> hio_close ->
* on_close -> HV_FREE(http_conn_t)
*
*/
static const char* host = "0.0.0.0";
static int port = 8000;
static int thread_num = 1;
static hloop_t* accept_loop = NULL;
static hloop_t** worker_loops = NULL;
#define HTTP_KEEPALIVE_TIMEOUT 60000 // ms
#define HTTP_MAX_URL_LENGTH 256
#define HTTP_MAX_HEAD_LENGTH 1024
#define HTML_TAG_BEGIN "<html><body><center><h1>"
#define HTML_TAG_END "</h1></center></body></html>"
// status_message
#define HTTP_OK "OK"
#define NOT_FOUND "Not Found"
#define NOT_IMPLEMENTED "Not Implemented"
// Content-Type
#define TEXT_PLAIN "text/plain"
#define TEXT_HTML "text/html"
typedef enum {
s_begin,
s_first_line,
s_request_line = s_first_line,
s_status_line = s_first_line,
s_head,
s_head_end,
s_body,
s_end
} http_state_e;
typedef struct {
// first line
int major_version;
int minor_version;
union {
// request line
struct {
char method[32];
char path[HTTP_MAX_URL_LENGTH];
};
// status line
struct {
int status_code;
char status_message[64];
};
};
// headers
char host[64];
int content_length;
char content_type[64];
unsigned keepalive: 1;
// char head[HTTP_MAX_HEAD_LENGTH];
// int head_len;
// body
char* body;
int body_len; // body_len = content_length
} http_msg_t;
typedef struct {
hio_t* io;
http_state_e state;
http_msg_t request;
http_msg_t response;
// for http_serve_file
FILE* fp;
hbuf_t filebuf;
} http_conn_t;
static char s_date[32] = {0};
static void update_date(htimer_t* timer) {
uint64_t now = hloop_now(hevent_loop(timer));
gmtime_fmt(now, s_date);
}
static int http_response_dump(http_msg_t* msg, char* buf, int len) {
int offset = 0;
// status line
offset += snprintf(buf + offset, len - offset, "HTTP/%d.%d %d %s\r\n", msg->major_version, msg->minor_version, msg->status_code, msg->status_message);
// headers
offset += snprintf(buf + offset, len - offset, "Server: libhv/%s\r\n", hv_version());
offset += snprintf(buf + offset, len - offset, "Connection: %s\r\n", msg->keepalive ? "keep-alive" : "close");
if (msg->content_length > 0) {
offset += snprintf(buf + offset, len - offset, "Content-Length: %d\r\n", msg->content_length);
}
if (*msg->content_type) {
offset += snprintf(buf + offset, len - offset, "Content-Type: %s\r\n", msg->content_type);
}
if (*s_date) {
offset += snprintf(buf + offset, len - offset, "Date: %s\r\n", s_date);
}
// TODO: Add your headers
offset += snprintf(buf + offset, len - offset, "\r\n");
// body
if (msg->body && msg->content_length > 0) {
memcpy(buf + offset, msg->body, msg->content_length);
offset += msg->content_length;
}
return offset;
}
static int http_reply(http_conn_t* conn,
int status_code, const char* status_message,
const char* content_type,
const char* body, int body_len) {
http_msg_t* req = &conn->request;
http_msg_t* resp = &conn->response;
resp->major_version = req->major_version;
resp->minor_version = req->minor_version;
resp->status_code = status_code;
if (status_message) strncpy(resp->status_message, status_message, sizeof(req->status_message) - 1);
if (content_type) strncpy(resp->content_type, content_type, sizeof(req->content_type) - 1);
resp->keepalive = req->keepalive;
if (body) {
if (body_len <= 0) body_len = strlen(body);
resp->content_length = body_len;
resp->body = (char*)body;
}
char* buf = NULL;
STACK_OR_HEAP_ALLOC(buf, HTTP_MAX_HEAD_LENGTH + resp->content_length, HTTP_MAX_HEAD_LENGTH + 1024);
int msglen = http_response_dump(resp, buf, HTTP_MAX_HEAD_LENGTH + resp->content_length);
int nwrite = hio_write(conn->io, buf, msglen);
STACK_OR_HEAP_FREE(buf);
return nwrite < 0 ? nwrite : msglen;
}
static void http_send_file(http_conn_t* conn) {
if (!conn || !conn->fp) return;
// alloc filebuf
if (!conn->filebuf.base) {
conn->filebuf.len = 4096;
HV_ALLOC(conn->filebuf, conn->filebuf.len);
}
char* filebuf = conn->filebuf.base;
size_t filebuflen = conn->filebuf.len;
// read file
int nread = fread(filebuf, 1, filebuflen, conn->fp);
if (nread <= 0) {
// eof or error
hio_close(conn->io);
return;
}
// send file
hio_write(conn->io, filebuf, nread);
}
static void on_write(hio_t* io, const void* buf, int writebytes) {
if (!io) return;
if (!hio_write_is_complete(io)) return;
http_conn_t* conn = (http_conn_t*)hevent_userdata(io);
http_send_file(conn);
}
static int http_serve_file(http_conn_t* conn) {
http_msg_t* req = &conn->request;
http_msg_t* resp = &conn->response;
// GET / HTTP/1.1\r\n
const char* filepath = req->path + 1;
// homepage
if (*filepath == '\0') {
filepath = "index.html";
}
// open file
conn->fp = fopen(filepath, "rb");
if (!conn->fp) {
http_reply(conn, 404, NOT_FOUND, TEXT_HTML, HTML_TAG_BEGIN NOT_FOUND HTML_TAG_END, 0);
return 404;
}
// send head
size_t filesize = hv_filesize(filepath);
resp->content_length = filesize;
const char* suffix = hv_suffixname(filepath);
const char* content_type = NULL;
if (strcmp(suffix, "html") == 0) {
content_type = TEXT_HTML;
} else {
// TODO: set content_type by suffix
}
hio_setcb_write(conn->io, on_write);
int nwrite = http_reply(conn, 200, "OK", content_type, NULL, 0);
if (nwrite < 0) return nwrite; // disconnected
return 200;
}
static bool parse_http_request_line(http_conn_t* conn, char* buf, int len) {
// GET / HTTP/1.1
http_msg_t* req = &conn->request;
sscanf(buf, "%s %s HTTP/%d.%d", req->method, req->path, &req->major_version, &req->minor_version);
if (req->major_version != 1) return false;
if (req->minor_version == 1) req->keepalive = 1;
// printf("%s %s HTTP/%d.%d\r\n", req->method, req->path, req->major_version, req->minor_version);
return true;
}
static bool parse_http_head(http_conn_t* conn, char* buf, int len) {
http_msg_t* req = &conn->request;
// Content-Type: text/html
const char* key = buf;
const char* val = buf;
char* delim = strchr(buf, ':');
if (!delim) return false;
*delim = '\0';
val = delim + 1;
// trim space
while (*val == ' ') ++val;
// printf("%s: %s\r\n", key, val);
if (stricmp(key, "Content-Length") == 0) {
req->content_length = atoi(val);
} else if (stricmp(key, "Content-Type") == 0) {
strncpy(req->content_type, val, sizeof(req->content_type) - 1);
} else if (stricmp(key, "Connection") == 0) {
if (stricmp(val, "close") == 0) {
req->keepalive = 0;
}
} else {
// TODO: save other head
}
return true;
}
static int on_request(http_conn_t* conn) {
http_msg_t* req = &conn->request;
// TODO: router
if (strcmp(req->method, "GET") == 0) {
// GET /ping HTTP/1.1\r\n
if (strcmp(req->path, "/ping") == 0) {
http_reply(conn, 200, "OK", TEXT_PLAIN, "pong", 4);
return 200;
} else {
// TODO: Add handler for your path
}
return http_serve_file(conn);
} else if (strcmp(req->method, "POST") == 0) {
// POST /echo HTTP/1.1\r\n
if (strcmp(req->path, "/echo") == 0) {
http_reply(conn, 200, "OK", req->content_type, req->body, req->content_length);
return 200;
} else {
// TODO: Add handler for your path
}
} else {
// TODO: handle other method
}
http_reply(conn, 501, NOT_IMPLEMENTED, TEXT_HTML, HTML_TAG_BEGIN NOT_IMPLEMENTED HTML_TAG_END, 0);
return 501;
}
static void on_close(hio_t* io) {
// printf("on_close fd=%d error=%d\n", hio_fd(io), hio_error(io));
http_conn_t* conn = (http_conn_t*)hevent_userdata(io);
if (conn) {
if (conn->fp) {
// close file
fclose(conn->fp);
conn->fp = NULL;
}
// free filebuf
HV_FREE(conn->filebuf.base);
HV_FREE(conn);
hevent_set_userdata(io, NULL);
}
}
static void on_recv(hio_t* io, void* buf, int readbytes) {
char* str = (char*)buf;
// printf("on_recv fd=%d readbytes=%d\n", hio_fd(io), readbytes);
// printf("%.*s", readbytes, str);
http_conn_t* conn = (http_conn_t*)hevent_userdata(io);
http_msg_t* req = &conn->request;
switch (conn->state) {
case s_begin:
// printf("s_begin");
conn->state = s_first_line;
case s_first_line:
// printf("s_first_line\n");
if (readbytes < 2) {
fprintf(stderr, "Not match \r\n!");
hio_close(io);
return;
}
str[readbytes - 2] = '\0';
if (parse_http_request_line(conn, str, readbytes - 2) == false) {
fprintf(stderr, "Failed to parse http request line:\n%s\n", str);
hio_close(io);
return;
}
// start read head
conn->state = s_head;
hio_readline(io);
break;
case s_head:
// printf("s_head\n");
if (readbytes < 2) {
fprintf(stderr, "Not match \r\n!");
hio_close(io);
return;
}
if (readbytes == 2 && str[0] == '\r' && str[1] == '\n') {
conn->state = s_head_end;
} else {
str[readbytes - 2] = '\0';
if (parse_http_head(conn, str, readbytes - 2) == false) {
fprintf(stderr, "Failed to parse http head:\n%s\n", str);
hio_close(io);
return;
}
hio_readline(io);
break;
}
case s_head_end:
// printf("s_head_end\n");
if (req->content_length == 0) {
conn->state = s_end;
goto s_end;
} else {
// start read body
conn->state = s_body;
// WARN: too large content_length should read multiple times!
hio_readbytes(io, req->content_length);
break;
}
case s_body:
// printf("s_body\n");
req->body = str;
req->body_len += readbytes;
if (req->body_len == req->content_length) {
conn->state = s_end;
} else {
// WARN: too large content_length should be handled by streaming!
break;
}
case s_end:
s_end:
// printf("s_end\n");
// received complete request
on_request(conn);
if (hio_is_closed(io)) return;
if (req->keepalive) {
// Connection: keep-alive\r\n
// reset and receive next request
memset(&conn->request, 0, sizeof(http_msg_t));
memset(&conn->response, 0, sizeof(http_msg_t));
conn->state = s_first_line;
hio_readline(io);
} else {
// Connection: close\r\n
hio_close(io);
}
break;
default: break;
}
}
static void new_conn_event(hevent_t* ev) {
hloop_t* loop = ev->loop;
hio_t* io = (hio_t*)hevent_userdata(ev);
hio_attach(loop, io);
/*
char localaddrstr[SOCKADDR_STRLEN] = {0};
char peeraddrstr[SOCKADDR_STRLEN] = {0};
printf("tid=%ld connfd=%d [%s] <= [%s]\n",
(long)hv_gettid(),
(int)hio_fd(io),
SOCKADDR_STR(hio_localaddr(io), localaddrstr),
SOCKADDR_STR(hio_peeraddr(io), peeraddrstr));
*/
hio_setcb_close(io, on_close);
hio_setcb_read(io, on_recv);
hio_set_keepalive_timeout(io, HTTP_KEEPALIVE_TIMEOUT);
http_conn_t* conn = NULL;
HV_ALLOC_SIZEOF(conn);
conn->io = io;
hevent_set_userdata(io, conn);
// start read first line
conn->state = s_first_line;
hio_readline(io);
}
static hloop_t* get_next_loop() {
static int s_cur_index = 0;
if (s_cur_index == thread_num) {
s_cur_index = 0;
}
return worker_loops[s_cur_index++];
}
static void on_accept(hio_t* io) {
hio_detach(io);
hloop_t* worker_loop = get_next_loop();
hevent_t ev;
memset(&ev, 0, sizeof(ev));
ev.loop = worker_loop;
ev.cb = new_conn_event;
ev.userdata = io;
hloop_post_event(worker_loop, &ev);
}
static HTHREAD_ROUTINE(worker_thread) {
hloop_t* loop = (hloop_t*)userdata;
hloop_run(loop);
return 0;
}
static HTHREAD_ROUTINE(accept_thread) {
hloop_t* loop = (hloop_t*)userdata;
hio_t* listenio = hloop_create_tcp_server(loop, host, port, on_accept);
if (listenio == NULL) {
exit(1);
}
printf("tinyhttpd listening on %s:%d, listenfd=%d, thread_num=%d\n",
host, port, hio_fd(listenio), thread_num);
// NOTE: add timer to update date every 1s
htimer_add(loop, update_date, 1000, INFINITE);
hloop_run(loop);
return 0;
}
int main(int argc, char** argv) {
if (argc < 2) {
printf("Usage: %s port [thread_num]\n", argv[0]);
return -10;
}
port = atoi(argv[1]);
if (argc > 2) {
thread_num = atoi(argv[2]);
} else {
thread_num = get_ncpu();
}
if (thread_num == 0) thread_num = 1;
worker_loops = (hloop_t**)malloc(sizeof(hloop_t*) * thread_num);
for (int i = 0; i < thread_num; ++i) {
worker_loops[i] = hloop_new(HLOOP_FLAG_AUTO_FREE);
hthread_create(worker_thread, worker_loops[i]);
}
accept_loop = hloop_new(HLOOP_FLAG_AUTO_FREE);
accept_thread(accept_loop);
return 0;
}