2 * Copyright (c) 1995, the EUROPAGATE consortium (see below).
4 * The EUROPAGATE consortium members are:
6 * University College Dublin
7 * Danmarks Teknologiske Videnscenter
8 * An Chomhairle Leabharlanna
9 * Consejo Superior de Investigaciones Cientificas
11 * Permission to use, copy, modify, distribute, and sell this software and
12 * its documentation, in whole or in part, for any purpose, is hereby granted,
15 * 1. This copyright and permission notice appear in all copies of the
16 * software and its documentation. Notices of copyright or attribution
17 * which appear at the beginning of any file must remain unchanged.
19 * 2. The names of EUROPAGATE or the project partners may not be used to
20 * endorse or promote products derived from this software without specific
21 * prior written permission.
23 * 3. Users of this software (implementors and gateway operators) agree to
24 * inform the EUROPAGATE consortium of their use of the software. This
25 * information will be used to evaluate the EUROPAGATE project and the
26 * software, and to plan further developments. The consortium may use
27 * the information in later publications.
29 * 4. Users of this software agree to make their best efforts, when
30 * documenting their use of the software, to acknowledge the EUROPAGATE
31 * consortium, and the role played by the software in their work.
33 * THIS SOFTWARE IS PROVIDED "AS IS" AND WITHOUT WARRANTY OF ANY KIND,
34 * EXPRESS, IMPLIED, OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
35 * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
36 * IN NO EVENT SHALL THE EUROPAGATE CONSORTIUM OR ITS MEMBERS BE LIABLE
37 * FOR ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF
38 * ANY KIND, OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA
39 * OR PROFITS, WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND
40 * ON ANY THEORY OF LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE
41 * USE OR PERFORMANCE OF THIS SOFTWARE.
44 * Revision 1.6 1995/11/06 10:51:17 adam
45 * End of response marker in response from wsh/wproto to wcgi.
46 * Shells are respawned when necessary.
48 * Revision 1.5 1995/11/02 16:35:37 adam
49 * Bug fixes and select on FIFOs in wcgi - doesn't really work!
51 * Revision 1.4 1995/10/31 16:56:25 adam
52 * Record presentation.
54 * Revision 1.3 1995/10/27 15:12:10 adam
55 * IrTcl incorporated in the gateway.
56 * Better separation of script types.
57 * Z39.50 gateway scripts entered.
59 * Revision 1.2 1995/10/23 16:55:39 adam
60 * A lot of changes - really.
62 * Revision 1.1 1995/10/20 11:49:26 adam
63 * First version of www gateway.
70 #include <sys/types.h>
80 static int wproto_dumpcache(WCLIENT wc, int level);
81 static int wproto_findcache(WCLIENT wc, char *name);
82 static void wproto_uncache(WCLIENT wc, int level);
84 static char *mod = "wproto";
86 void wo_write (WCLIENT wc, const char *s, size_t len)
88 if (wc->outbuffer_offset + len >= wc->outbuffer_size)
89 wc->outbuffer = realloc(wc->outbuffer, wc->outbuffer_size +=
91 memcpy(wc->outbuffer + wc->outbuffer_offset, s, len);
92 wc->outbuffer_offset += len;
95 void wo_puts (WCLIENT wc, const char *s)
97 wo_write (wc, s, strlen(s));
100 void wo_printf (WCLIENT wc, const char *fmt, ...)
106 vsprintf(tmpbuf, fmt, ap);
111 void wo_clear (WCLIENT wc, char *type)
114 wc->outbuffer = malloc(wc->outbuffer_size = OUTBUFFER_CHUNK);
115 wc->outbuffer_offset = 0;
116 wo_printf(wc, "Content-type: %s\n\n", type);
119 int wo_puthtml (WCLIENT wc, char *name)
124 wo_clear(wc, "text/html");
125 if (!(f = fopen(name, "r")))
127 wo_printf(wc, "<BR>Failed to open file: %s<BR>", name);
130 while (ch = getc(f), !feof(f))
132 if (wo_putc(wc, ch) < 0)
142 int wo_flush(WCLIENT wc)
146 if (!(wc->outbuffer_offset))
148 towrite = wc->outbuffer_offset;
149 wc->outbuffer_offset = 0;
155 wrote = write(wc->lineout, wc->outbuffer + wc->outbuffer_offset,
159 gw_log (GW_LOG_FATAL|GW_LOG_ERRNO, mod, "write response");
162 gw_log (GW_LOG_DEBUG, mod, "wrote %d bytes", wrote);
163 if (wc->cache_fd >= 0)
164 if (write(wc->cache_fd, wc->outbuffer + wc->outbuffer_offset,
167 gw_log (GW_LOG_FATAL|GW_LOG_ERRNO, mod, "write cache");
173 wc->outbuffer_offset += wrote;
175 wc->outbuffer_offset = 0;
179 int wo_overflow(WCLIENT wc, char ch)
181 gw_log (GW_LOG_DEBUG, mod, "wo_overflow");
182 if (wo_flush(wc) < 0)
184 return wo_putc(wc, ch);
187 int wo_finish(WCLIENT wc)
189 gw_log (GW_LOG_DEBUG, mod, "wo_finish");
192 if (wo_flush(wc) < 0)
196 if (wc->cache_fd >= 0)
204 static void descramble(char *t, const char *o)
210 if (*o == '%' && isxdigit(*(o + 1)) && isxdigit(*(o + 2)))
212 sscanf(o + 1, "%2x", &v);
222 static void decode_form(wform_data *form, char *buf)
230 for (p = form[i].name; *buf && *buf != '='; buf++)
235 for (p = tmp; *buf && *buf != '&'; buf++)
238 descramble(form[i].value, tmp);
243 *form[i].name = '\0';
246 char *wgetval(WCLIENT wc, char *name)
250 for (i = 0; *wc->wf_data[i].name; i++)
251 if (!strcmp(name, wc->wf_data[i].name))
252 return wc->wf_data[i].value;
256 int wproto_process(WCLIENT wc, int timeout)
258 int toread, rs, level;
259 char combuf[COMBUF], *p,*t;
261 struct timeval to, *top;
265 gw_log (GW_LOG_DEBUG, mod, "process waiting for input.");
275 FD_SET(wc->linein, &input);
276 /* go through select handle list */
277 while ((rs = select(wc->linein + 1, &input, 0, 0, top)) < 0 &&
282 gw_log (GW_LOG_FATAL|GW_LOG_ERRNO, mod, "select");
287 gw_log (GW_LOG_STAT, mod,
288 "wproto_process returning 0 after %d second timeout.",
290 unlink (wc->wf_serverp);
293 /* determine handle (fifo or user) */
294 if (read(wc->linein, &toread, sizeof(toread)) < sizeof(toread))
296 gw_log (GW_LOG_FATAL|GW_LOG_ERRNO, mod, "wp_proc:len read failed");
299 toread -= sizeof(toread);
300 if (read(wc->linein, combuf, toread) < toread)
302 gw_log (GW_LOG_FATAL|GW_LOG_ERRNO, mod, "wp_proc: data read failed");
306 for (t = wc->wf_serverp; (*t = *p); t++, p++);
308 for (t = wc->wf_parms; (*t = *p); t++, p++);
310 p++; /* we don't deal with envvars yet */
311 decode_form(wc->wf_data, p);
312 if (wc->lineout < 0 && (wc->lineout = open(wc->wf_serverp, O_WRONLY))
315 gw_log (GW_LOG_FATAL|GW_LOG_ERRNO, mod, "open %s", wc->wf_serverp);
318 /* look in cache only if request carries no forms data. */
319 if (!*wc->wf_data[0].name && (level = wproto_findcache(wc,
322 wproto_dumpcache(wc, level);
332 WCLIENT wproto_init(void)
334 char *val, path2[256];
337 gw_log (GW_LOG_DEBUG, mod, "wproto_init");
338 close(1); /* release us from the wserver */
339 if (!(new = malloc(sizeof(*new))))
341 gw_log (GW_LOG_FATAL|GW_LOG_ERRNO, mod, "malloc");
344 if (!(val = getenv ("GWID")))
346 gw_log (GW_LOG_FATAL, mod, "GWID not set");
349 new->id = atoi (val);
350 sprintf(new->path, "%s/%s/clt%d", FIFOROOT, FIFODIR, new->id);
351 if (mkfifo(new->path, 0666 | S_IFIFO) < 0)
353 gw_log (GW_LOG_FATAL|GW_LOG_ERRNO, mod, "mkfifo(%s)", new->path);
356 gw_log (GW_LOG_DEBUG, mod, "Synchronizing with server.");
357 sprintf(path2, "%s/%s/srv%d", FIFOROOT, FIFODIR, getppid());
358 if ((new->lineout = open(path2, O_WRONLY)) < 0)
360 gw_log (GW_LOG_FATAL|GW_LOG_ERRNO, mod, "open out %s", path2);
363 if (write(new->lineout, "OK", 2) < 2)
365 gw_log (GW_LOG_FATAL|GW_LOG_ERRNO, mod, "write");
368 gw_log (GW_LOG_DEBUG, mod, "Synchronized.");
369 if ((new->linein = open(new->path, O_RDONLY)) < 0)
371 gw_log (GW_LOG_FATAL|GW_LOG_ERRNO, mod, "open input %s", new->path);
374 gw_log (GW_LOG_DEBUG, mod, "init. linein=%d lineout=%d",
375 new->linein, new->lineout);
376 /* we put a handle on this so we get a blocking read when no peer */
377 if (open(new->path, O_WRONLY | O_NDELAY) < 0)
379 gw_log (GW_LOG_FATAL|GW_LOG_ERRNO, mod, "open dummy %s", new->path);
383 new->cache_level = -1;
388 static void wproto_uncache(WCLIENT wc, int level)
390 for (;wc->cache_level >= level; wc->cache_level--)
391 unlink(wc->cache[wc->cache_level].path);
394 void wproto_terminate(WCLIENT wc)
398 wproto_uncache(wc, 0);
402 int wproto_cache(WCLIENT wc, int level)
406 if (level > wc->cache_level + 1)
408 gw_log (GW_LOG_FATAL, mod, "Illegal cache level increment.");
411 wproto_uncache(wc, level);
412 p = &wc->cache[++wc->cache_level];
413 sprintf(p->path, "%s/%s/csh%d.%d", FIFOROOT, FIFODIR, wc->id, level);
414 if ((wc->cache_fd = open(p->path, O_WRONLY|O_CREAT|O_TRUNC, 0600)) < 0)
416 gw_log (GW_LOG_FATAL|GW_LOG_ERRNO, mod, "open %s", p->path);
419 strcpy(p->name, wc->wf_parms);
423 static int wproto_findcache(WCLIENT wc, char *name)
427 for (i = 0; i <= wc->cache_level; i++)
428 if (!strcmp(wc->cache[i].name, name))
433 static int wproto_dumpcache(WCLIENT wc, int level)
437 gw_log (GW_LOG_STAT, mod, "Using Cache: %s", wc->cache[level].name);
438 if ((fd = open(wc->cache[level].path, O_RDONLY)) < 0)
440 gw_log (GW_LOG_FATAL, mod, "open (R) %s", wc->cache[level].path);
443 while ((rd = read(fd, wc->outbuffer, OUTBUFFER_CHUNK)) > 0)
444 if (write(wc->lineout, wc->outbuffer, rd) < rd)
446 gw_log (GW_LOG_FATAL|GW_LOG_ERRNO, mod, "write toline");
451 gw_log (GW_LOG_FATAL|GW_LOG_ERRNO, mod, "read");
454 wproto_uncache(wc, level + 1);