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 1.7 1995/11/10 14:47:32 adam
45 * Plus (+) characters automatically converted to space in forms.
46 * Work on search in multiple targets. Doesn't work well - yet.
47 * Presentation formats enhanced.
49 * Revision 1.6 1995/11/06 10:51:17 adam
50 * End of response marker in response from wsh/wproto to wcgi.
51 * Shells are respawned when necessary.
53 * Revision 1.5 1995/11/02 16:35:37 adam
54 * Bug fixes and select on FIFOs in wcgi - doesn't really work!
56 * Revision 1.4 1995/10/31 16:56:25 adam
57 * Record presentation.
59 * Revision 1.3 1995/10/27 15:12:10 adam
60 * IrTcl incorporated in the gateway.
61 * Better separation of script types.
62 * Z39.50 gateway scripts entered.
64 * Revision 1.2 1995/10/23 16:55:39 adam
65 * A lot of changes - really.
67 * Revision 1.1 1995/10/20 11:49:26 adam
68 * First version of www gateway.
75 #include <sys/types.h>
85 static int wproto_dumpcache(WCLIENT wc, int level);
86 static int wproto_findcache(WCLIENT wc, char *name);
87 static void wproto_uncache(WCLIENT wc, int level);
89 static char *mod = "wproto";
91 void wo_write (WCLIENT wc, const char *s, size_t len)
93 if (wc->outbuffer_offset + len >= wc->outbuffer_size)
94 wc->outbuffer = realloc(wc->outbuffer, wc->outbuffer_size +=
96 memcpy(wc->outbuffer + wc->outbuffer_offset, s, len);
97 wc->outbuffer_offset += len;
100 void wo_puts (WCLIENT wc, const char *s)
102 wo_write (wc, s, strlen(s));
105 void wo_printf (WCLIENT wc, const char *fmt, ...)
111 vsprintf(tmpbuf, fmt, ap);
116 void wo_clear (WCLIENT wc, char *type)
119 wc->outbuffer = malloc(wc->outbuffer_size = OUTBUFFER_CHUNK);
120 wc->outbuffer_offset = 0;
121 wo_printf(wc, "Content-type: %s\n\n", type);
124 int wo_puthtml (WCLIENT wc, char *name)
129 wo_clear(wc, "text/html");
130 if (!(f = fopen(name, "r")))
132 wo_printf(wc, "<BR>Failed to open file: %s<BR>", name);
135 while (ch = getc(f), !feof(f))
137 if (wo_putc(wc, ch) < 0)
147 int wo_flush(WCLIENT wc)
151 if (!(wc->outbuffer_offset))
153 towrite = wc->outbuffer_offset;
154 wc->outbuffer_offset = 0;
160 wrote = write(wc->lineout, wc->outbuffer + wc->outbuffer_offset,
164 gw_log (GW_LOG_FATAL|GW_LOG_ERRNO, mod, "write response");
167 gw_log (GW_LOG_DEBUG, mod, "wrote %d bytes", wrote);
168 if (wc->cache_fd >= 0)
169 if (write(wc->cache_fd, wc->outbuffer + wc->outbuffer_offset,
172 gw_log (GW_LOG_FATAL|GW_LOG_ERRNO, mod, "write cache");
178 wc->outbuffer_offset += wrote;
180 wc->outbuffer_offset = 0;
184 int wo_overflow(WCLIENT wc, char ch)
186 gw_log (GW_LOG_DEBUG, mod, "wo_overflow");
187 if (wo_flush(wc) < 0)
189 return wo_putc(wc, ch);
192 int wo_finish(WCLIENT wc)
194 gw_log (GW_LOG_DEBUG, mod, "wo_finish");
197 if (wo_flush(wc) < 0)
201 if (wc->cache_fd >= 0)
209 static void descramble(char *t, const char *o)
215 if (*o == '%' && isxdigit(*(o + 1)) && isxdigit(*(o + 2)))
217 sscanf(o + 1, "%2x", &v);
238 static void decode_form(wform_data *form, char *buf)
246 for (p = form[i].name; *buf && *buf != '='; buf++)
251 for (p = tmp; *buf && *buf != '&'; buf++)
254 descramble(form[i].value, tmp);
259 *form[i].name = '\0';
262 char *wgetval(WCLIENT wc, char *name)
266 for (i = 0; *wc->wf_data[i].name; i++)
267 if (!strcmp(name, wc->wf_data[i].name))
268 return wc->wf_data[i].value;
272 int wproto_process(WCLIENT wc, int timeout)
274 int toread, rs, level;
275 char combuf[COMBUF], *p,*t;
277 struct timeval to, *top;
281 gw_log (GW_LOG_DEBUG, mod, "process waiting for input.");
291 FD_SET(wc->linein, &input);
292 /* go through select handle list */
293 while ((rs = select(wc->linein + 1, &input, 0, 0, top)) < 0 &&
298 gw_log (GW_LOG_FATAL|GW_LOG_ERRNO, mod, "select");
303 gw_log (GW_LOG_STAT, mod,
304 "wproto_process returning 0 after %d second timeout.",
306 unlink (wc->wf_serverp);
309 /* determine handle (fifo or user) */
310 if (read(wc->linein, &toread, sizeof(toread)) < sizeof(toread))
312 gw_log (GW_LOG_FATAL|GW_LOG_ERRNO, mod, "wp_proc:len read failed");
315 toread -= sizeof(toread);
316 if (read(wc->linein, combuf, toread) < toread)
318 gw_log (GW_LOG_FATAL|GW_LOG_ERRNO, mod, "wp_proc: data read failed");
322 for (t = wc->wf_serverp; (*t = *p); t++, p++);
324 for (t = wc->wf_parms; (*t = *p); t++, p++);
326 p++; /* we don't deal with envvars yet */
327 decode_form(wc->wf_data, p);
328 if (wc->lineout < 0 && (wc->lineout = open(wc->wf_serverp, O_WRONLY))
331 gw_log (GW_LOG_FATAL|GW_LOG_ERRNO, mod, "open %s", wc->wf_serverp);
334 /* look in cache only if request carries no forms data. */
335 if (!*wc->wf_data[0].name && (level = wproto_findcache(wc,
338 wproto_dumpcache(wc, level);
348 WCLIENT wproto_init(void)
350 char *val, path2[256];
353 gw_log (GW_LOG_DEBUG, mod, "wproto_init");
354 close(1); /* release us from the wserver */
355 if (!(new = malloc(sizeof(*new))))
357 gw_log (GW_LOG_FATAL|GW_LOG_ERRNO, mod, "malloc");
360 if (!(val = getenv ("GWID")))
362 gw_log (GW_LOG_FATAL, mod, "GWID not set");
365 new->id = atoi (val);
366 sprintf(new->path, "%s/%s/clt%d", FIFOROOT, FIFODIR, new->id);
367 if (mkfifo(new->path, 0666 | S_IFIFO) < 0)
369 gw_log (GW_LOG_FATAL|GW_LOG_ERRNO, mod, "mkfifo(%s)", new->path);
372 gw_log (GW_LOG_DEBUG, mod, "Synchronizing with server.");
373 sprintf(path2, "%s/%s/srv%d", FIFOROOT, FIFODIR, getppid());
374 if ((new->lineout = open(path2, O_WRONLY)) < 0)
376 gw_log (GW_LOG_FATAL|GW_LOG_ERRNO, mod, "open out %s", path2);
379 if (write(new->lineout, "OK", 2) < 2)
381 gw_log (GW_LOG_FATAL|GW_LOG_ERRNO, mod, "write");
384 gw_log (GW_LOG_DEBUG, mod, "Synchronized.");
385 if ((new->linein = open(new->path, O_RDONLY)) < 0)
387 gw_log (GW_LOG_FATAL|GW_LOG_ERRNO, mod, "open input %s", new->path);
390 gw_log (GW_LOG_DEBUG, mod, "init. linein=%d lineout=%d",
391 new->linein, new->lineout);
392 /* we put a handle on this so we get a blocking read when no peer */
393 if (open(new->path, O_WRONLY | O_NDELAY) < 0)
395 gw_log (GW_LOG_FATAL|GW_LOG_ERRNO, mod, "open dummy %s", new->path);
399 new->cache_level = -1;
404 static void wproto_uncache(WCLIENT wc, int level)
406 for (;wc->cache_level >= level; wc->cache_level--)
407 unlink(wc->cache[wc->cache_level].path);
410 void wproto_terminate(WCLIENT wc)
414 wproto_uncache(wc, 0);
418 int wproto_cache(WCLIENT wc, int level)
422 if (level > wc->cache_level + 1)
424 gw_log (GW_LOG_FATAL, mod, "Illegal cache level increment.");
427 wproto_uncache(wc, level);
428 p = &wc->cache[++wc->cache_level];
429 sprintf(p->path, "%s/%s/csh%d.%d", FIFOROOT, FIFODIR, wc->id, level);
430 if ((wc->cache_fd = open(p->path, O_WRONLY|O_CREAT|O_TRUNC, 0600)) < 0)
432 gw_log (GW_LOG_FATAL|GW_LOG_ERRNO, mod, "open %s", p->path);
435 strcpy(p->name, wc->wf_parms);
439 static int wproto_findcache(WCLIENT wc, char *name)
443 for (i = 0; i <= wc->cache_level; i++)
444 if (!strcmp(wc->cache[i].name, name))
449 static int wproto_dumpcache(WCLIENT wc, int level)
453 gw_log (GW_LOG_STAT, mod, "Using Cache: %s", wc->cache[level].name);
454 if ((fd = open(wc->cache[level].path, O_RDONLY)) < 0)
456 gw_log (GW_LOG_FATAL, mod, "open (R) %s", wc->cache[level].path);
459 while ((rd = read(fd, wc->outbuffer, OUTBUFFER_CHUNK)) > 0)
460 if (write(wc->lineout, wc->outbuffer, rd) < rd)
462 gw_log (GW_LOG_FATAL|GW_LOG_ERRNO, mod, "write toline");
467 gw_log (GW_LOG_FATAL|GW_LOG_ERRNO, mod, "read");
470 wproto_uncache(wc, level + 1);