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
|
/*****************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2002, Daniel Stenberg, <daniel@haxx.se>, et al.
*
* In order to be useful for every potential user, curl and libcurl are
* dual-licensed under the MPL and the MIT/X-derivate licenses.
*
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the MPL or the MIT/X-derivate
* licenses. You may pick one of these licenses.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
* $Id$
*****************************************************************************/
/* sws.c: simple (silly?) web server
This code was originally graciously donated to the project Juergen
Wilke. Thanks a bunch!
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <signal.h>
#include <time.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
const char *
spitout(FILE *stream,
const char *main,
const char *sub, int *size);
#define DEFAULT_PORT 8999
#ifndef DEFAULT_LOGFILE
#define DEFAULT_LOGFILE "log/sws.log"
#endif
#define VERSION "cURL test suite HTTP server/0.1"
#define REQUEST_DUMP "log/server.input"
#define TEST_DATA_PATH "data/test%d"
static const char *docfriends = "HTTP/1.1 200 Mighty fine indeed\r\n\r\nWE ROOLZ\r\n";
static const char *doc404 = "HTTP/1.1 404 Not Found\n"
"Server: " VERSION "\n"
"Connection: close\n"
"Content-Type: text/html\n"
"\n"
"<!DOCTYPE HTML PUBLIC \"-//IETF//DTD HTML 2.0//EN\">\n"
"<HTML><HEAD>\n"
"<TITLE>404 Not Found</TITLE>\n"
"</HEAD><BODY>\n"
"<H1>Not Found</H1>\n"
"The requested URL was not found on this server.\n"
"<P><HR><ADDRESS>" VERSION "</ADDRESS>\n" "</BODY></HTML>\n";
#ifdef HAVE_SIGNAL
static volatile int sigpipe;
#endif
static FILE *logfp;
static void logmsg(const char *msg)
{
time_t t = time(NULL);
struct tm *curr_time = localtime(&t);
char loctime[80];
strcpy(loctime, asctime(curr_time));
loctime[strlen(loctime) - 1] = '\0';
fprintf(logfp, "%s: pid %d: %s\n", loctime, (int)getpid(), msg);
#ifdef DEBUG
fprintf(stderr, "%s: pid %d: %s\n", loctime, (int)getpid(), msg);
#endif
fflush(logfp);
}
#ifdef HAVE_SIGNAL
static void sigpipe_handler(int sig)
{
(void)sig; /* prevent warning */
sigpipe = 1;
}
#endif
int ProcessRequest(char *request)
{
char *line=request;
unsigned long contentlength=0;
#define END_OF_HEADERS "\r\n\r\n"
char *end;
end = strstr(request, END_OF_HEADERS);
if(!end)
/* we don't have a complete request yet! */
return 0;
/* **** Persistancy ****
*
* If the request is a HTTP/1.0 one, we close the connection unconditionally
* when we're done.
*
* If the request is a HTTP/1.1 one, we MUST check for a "Connection:"
* header that might say "close". If it does, we close a connection when
* this request is processed. Otherwise, we keep the connection alive for X
* seconds.
*/
do {
if(!strncasecmp("Content-Length:", line, 15))
contentlength = strtol(line+15, &line, 10);
line = strchr(line, '\n');
if(line)
line++;
} while(line);
if(contentlength > 0 ) {
if(contentlength <= strlen(end+strlen(END_OF_HEADERS)))
return 1; /* done */
else
return 0; /* not complete yet */
}
return 1; /* done */
}
/* store the entire request in a file */
void storerequest(char *reqbuf)
{
FILE *dump;
dump = fopen(REQUEST_DUMP, "ab"); /* b is for windows-preparing */
if(dump) {
fwrite(reqbuf, 1, strlen(reqbuf), dump);
fclose(dump);
}
}
#define REQBUFSIZ 150000
#define REQBUFSIZ_TXT "149999"
/* very-big-path support */
#define MAXDOCNAMELEN 140000
#define MAXDOCNAMELEN_TXT "139999"
#define REQUEST_KEYWORD_SIZE 256
static int get_request(int sock, int *part)
{
static char reqbuf[REQBUFSIZ], doc[MAXDOCNAMELEN];
static char request[REQUEST_KEYWORD_SIZE];
unsigned int offset = 0;
int prot_major, prot_minor;
char logbuf[256];
*part = 0; /* part zero equals none */
while (offset < REQBUFSIZ) {
int got = recv(sock, reqbuf + offset, REQBUFSIZ - offset, 0);
if (got <= 0) {
if (got < 0) {
perror("recv");
return -1;
}
logmsg("Connection closed by client");
return -1;
}
offset += got;
reqbuf[offset] = 0;
if(ProcessRequest(reqbuf))
break;
}
if (offset >= REQBUFSIZ) {
logmsg("Request buffer overflow, closing connection");
return -1;
}
reqbuf[offset]=0;
logmsg("Received a request");
/* dump the request to an external file */
storerequest(reqbuf);
if (sscanf(reqbuf, "%" REQBUFSIZ_TXT"s %" MAXDOCNAMELEN_TXT "s HTTP/%d.%d",
request,
doc,
&prot_major,
&prot_minor) == 4) {
char *ptr;
int test_no=0;
/* find the last slash */
ptr = strrchr(doc, '/');
/* get the number after it */
if(ptr) {
if((strlen(doc) + strlen(request)) < 200)
sprintf(logbuf, "Got request: %s %s HTTP/%d.%d",
request, doc, prot_major, prot_minor);
else
sprintf(logbuf, "Got a *HUGE* request HTTP/%d.%d",
prot_major, prot_minor);
logmsg(logbuf);
if(!strncmp("/verifiedserver", ptr, 15)) {
logmsg("Are-we-friendly question received");
return -2;
}
ptr++; /* skip the slash */
test_no = strtol(ptr, &ptr, 10);
if(test_no > 10000) {
*part = test_no % 10000;
test_no /= 10000;
}
sprintf(logbuf, "Found test number %d in path", test_no);
logmsg(logbuf);
}
else {
logmsg("Did not find test number in PATH");
}
return test_no;
}
logmsg("Got illegal request");
fprintf(stderr, "Got illegal request\n");
return -1;
}
static int send_doc(int sock, int doc, int part_no)
{
int written;
int count;
const char *buffer;
char *ptr;
FILE *stream;
char *cmd=NULL;
int cmdsize;
char filename[256];
char partbuf[80]="data";
if(doc < 0) {
if(-2 == doc)
/* we got a "friends?" question, reply back that we sure are */
buffer = docfriends;
else
buffer = doc404;
ptr = NULL;
stream=NULL;
count = strlen(buffer);
}
else {
if(0 != part_no) {
sprintf(partbuf, "data%d", part_no);
}
sprintf(filename, TEST_DATA_PATH, doc);
stream=fopen(filename, "rb");
if(!stream) {
logmsg("Couldn't open test file");
return 0;
}
else {
buffer = spitout(stream, "reply", partbuf, &count);
ptr = (char *)buffer;
fclose(stream);
}
/* re-open the same file again */
stream=fopen(filename, "rb");
if(!stream) {
logmsg("Couldn't open test file");
return 0;
}
else {
/* get the custom server control "commands" */
cmd = (char *)spitout(stream, "reply", "postcmd", &cmdsize);
fclose(stream);
}
}
do {
written = send(sock, buffer, count, 0);
if (written < 0) {
return -1;
}
count -= written;
buffer += written;
} while(count>0);
if(ptr)
free(ptr);
if(cmdsize > 0 ) {
char command[32];
int num;
char *ptr=cmd;
do {
if(2 == sscanf(ptr, "%31s %d", command, &num)) {
if(!strcmp("wait", command))
sleep(num); /* wait this many seconds */
else {
logmsg("Unknown command in reply command section");
}
}
ptr = strchr(ptr, '\n');
if(ptr)
ptr++;
else
ptr = NULL;
} while(ptr && *ptr);
}
if(cmd)
free(cmd);
return 0;
}
int main(int argc, char *argv[])
{
struct sockaddr_in me;
int sock, msgsock, flag;
unsigned short port = DEFAULT_PORT;
const char *logfile = DEFAULT_LOGFILE;
int part_no;
FILE *pidfile;
if(argc>1)
port = atoi(argv[1]);
/* FIX: write our pid to a file name */
logfp = fopen(logfile, "a");
if (!logfp) {
perror(logfile);
exit(1);
}
#ifdef HAVE_SIGNAL
/* FIX: make a more portable signal handler */
signal(SIGPIPE, sigpipe_handler);
siginterrupt(SIGPIPE, 1);
#endif
sock = socket(AF_INET, SOCK_STREAM, 0);
if (sock < 0) {
perror("opening stream socket");
fprintf(logfp, "Error opening socket -- aborting\n");
fclose(logfp);
exit(1);
}
flag = 1;
if (setsockopt
(sock, SOL_SOCKET, SO_REUSEADDR, (const void *) &flag,
sizeof(int)) < 0) {
perror("setsockopt(SO_REUSEADDR)");
}
me.sin_family = AF_INET;
me.sin_addr.s_addr = INADDR_ANY;
me.sin_port = htons(port);
if (bind(sock, (struct sockaddr *) &me, sizeof me) < 0) {
perror("binding stream socket");
fprintf(logfp, "Error binding socket -- aborting\n");
fclose(logfp);
exit(1);
}
pidfile = fopen(".http.pid", "w");
if(pidfile) {
fprintf(pidfile, "%d\n", (int)getpid());
fclose(pidfile);
}
else
fprintf(stderr, "Couldn't write pid file\n");
/* start accepting connections */
listen(sock, 5);
fprintf(stderr, "*** %s listening on port %u ***\n", VERSION, port);
while (1) {
int doc;
msgsock = accept(sock, NULL, NULL);
if (msgsock == -1)
continue;
logmsg("New client connected");
doc = get_request(msgsock, &part_no);
send_doc(msgsock, doc, part_no);
close(msgsock);
}
close(sock);
fclose(logfp);
return 0;
}
|
