1 /* $Id: http_command.c,v 1.44 2007-05-23 21:58:28 adam Exp $
2 Copyright (c) 2006-2007, Index Data.
4 This file is part of Pazpar2.
6 Pazpar2 is free software; you can redistribute it and/or modify it under
7 the terms of the GNU General Public License as published by the Free
8 Software Foundation; either version 2, or (at your option) any later
11 Pazpar2 is distributed in the hope that it will be useful, but WITHOUT ANY
12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16 You should have received a copy of the GNU General Public License
17 along with Pazpar2; see the file LICENSE. If not, write to the
18 Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
23 * $Id: http_command.c,v 1.44 2007-05-23 21:58:28 adam Exp $
27 #include <sys/types.h>
34 #include <yaz/snprintf.h>
39 #include <yaz/yaz-util.h>
46 #include "http_command.h"
50 // Update this when the protocol changes
51 #define PAZPAR2_PROTOCOL_VERSION "1"
54 IOCHAN timeout_iochan; // NOTE: This is NOT associated with a socket
55 struct session *psession;
56 unsigned int session_id;
59 struct http_session *next;
62 static struct http_session *session_list = 0;
64 void http_session_destroy(struct http_session *s);
66 static void session_timeout(IOCHAN i, int event)
68 struct http_session *s = iochan_getdata(i);
69 http_session_destroy(s);
72 struct http_session *http_session_create()
74 NMEM nmem = nmem_create();
75 struct http_session *r = nmem_malloc(nmem, sizeof(*r));
77 r->psession = new_session(nmem);
81 r->next = session_list;
83 r->timeout_iochan = iochan_create(-1, session_timeout, 0);
84 iochan_setdata(r->timeout_iochan, r);
85 iochan_settimeout(r->timeout_iochan, global_parameters.session_timeout);
87 pazpar2_add_channel(r->timeout_iochan);
91 void http_session_destroy(struct http_session *s)
93 struct http_session **p;
95 for (p = &session_list; *p; p = &(*p)->next)
101 iochan_destroy(s->timeout_iochan);
102 destroy_session(s->psession);
103 nmem_destroy(s->nmem);
106 static void error(struct http_response *rs,
107 const char *code, const char *msg, const char *extra)
109 struct http_channel *c = rs->channel;
111 char *sep = extra ? ": " : "";
113 rs->msg = nmem_strdup(c->nmem, msg);
114 strcpy(rs->code, code);
116 yaz_snprintf(text, sizeof(text),
117 "<error code=\"general\">%s%s%s</error>", msg, sep,
120 yaz_log(YLOG_WARN, "HTTP %s %s%s%s", code, msg, sep,
122 rs->payload = nmem_strdup(c->nmem, text);
123 http_send_response(c);
126 unsigned int make_sessionid()
132 if (global_parameters.debug_mode)
138 if (gettimeofday(&t, 0) < 0)
140 yaz_log(YLOG_WARN|YLOG_ERRNO, "gettimeofday");
143 /* at most 256 sessions per second ..
144 (long long would be more appropriate)*/
146 res = ((res << 8) | (seq & 0xff)) & ((1U << 31) - 1);
151 static struct http_session *locate_session(struct http_request *rq, struct http_response *rs)
153 struct http_session *p;
154 char *session = http_argbyname(rq, "session");
159 error(rs, "417", "Must supply session", 0);
163 for (p = session_list; p; p = p->next)
164 if (id == p->session_id)
166 iochan_activity(p->timeout_iochan);
169 error(rs, "417", "Session does not exist, or it has expired", 0);
173 // Decode settings parameters and apply to session
174 // Syntax: setting[target]=value
175 static int process_settings(struct session *se, struct http_request *rq,
176 struct http_response *rs)
178 struct http_argument *a;
180 for (a = rq->arguments; a; a = a->next)
181 if (strchr(a->name, '['))
188 // Nmem_strsplit *rules*!!!
189 nmem_strsplit(se->session_nmem, "[]", a->name, &res, &num);
192 error(rs, "417", "Malformed setting argument", a->name);
197 session_apply_setting(se, dbname, setting,
198 nmem_strdup(se->session_nmem, a->value));
203 static void cmd_exit(struct http_channel *c)
205 yaz_log(YLOG_WARN, "exit");
209 static void cmd_init(struct http_channel *c)
213 struct http_session *s = http_session_create();
214 struct http_response *rs = c->response;
216 yaz_log(YLOG_DEBUG, "HTTP Session init");
217 sesid = make_sessionid();
218 s->session_id = sesid;
219 if (process_settings(s->psession, c->request, c->response) < 0)
221 sprintf(buf, "<init><status>OK</status><session>%u</session>"
222 "<protocol>" PAZPAR2_PROTOCOL_VERSION "</protocol></init>", sesid);
223 rs->payload = nmem_strdup(c->nmem, buf);
224 http_send_response(c);
227 static void cmd_settings(struct http_channel *c)
229 struct http_response *rs = c->response;
230 struct http_request *rq = c->request;
231 struct http_session *s = locate_session(rq, rs);
236 if (process_settings(s->psession, rq, rs) < 0)
238 rs->payload = "<settings><status>OK</status></settings>";
239 http_send_response(c);
242 // Compares two hitsbytarget nodes by hitcount
243 static int cmp_ht(const void *p1, const void *p2)
245 const struct hitsbytarget *h1 = p1;
246 const struct hitsbytarget *h2 = p2;
247 return h2->hits - h1->hits;
250 // This implements functionality somewhat similar to 'bytarget', but in a termlist form
251 static void targets_termlist(WRBUF wrbuf, struct session *se, int num)
253 struct hitsbytarget *ht;
256 if (!(ht = hitsbytarget(se, &count)))
258 qsort(ht, count, sizeof(struct hitsbytarget), cmp_ht);
259 for (i = 0; i < count && i < num && ht[i].hits > 0; i++)
261 wrbuf_puts(wrbuf, "\n<term>\n");
262 wrbuf_printf(wrbuf, "<id>%s</id>\n", ht[i].id);
263 wrbuf_printf(wrbuf, "<name>%s</name>\n", ht[i].name);
264 wrbuf_printf(wrbuf, "<frequency>%d</frequency>\n", ht[i].hits);
265 wrbuf_printf(wrbuf, "<state>%s</state>\n", ht[i].state);
266 wrbuf_printf(wrbuf, "<diagnostic>%d</diagnostic>\n", ht[i].diagnostic);
267 wrbuf_puts(wrbuf, "\n</term>\n");
271 static void cmd_termlist(struct http_channel *c)
273 struct http_response *rs = c->response;
274 struct http_request *rq = c->request;
275 struct http_session *s = locate_session(rq, rs);
276 struct termlist_score **p;
279 char *name = http_argbyname(rq, "name");
280 char *nums = http_argbyname(rq, "num");
287 status = session_active_clients(s->psession);
291 if (strlen(name) > 255)
296 wrbuf_rewind(c->wrbuf);
298 wrbuf_puts(c->wrbuf, "<termlist>");
299 wrbuf_printf(c->wrbuf, "\n<activeclients>%d</activeclients>", status);
305 if (!(tp = strchr(name, ',')))
306 tp = name + strlen(name);
307 strncpy(tname, name, tp - name);
308 tname[tp - name] = '\0';
310 wrbuf_printf(c->wrbuf, "\n<list name=\"%s\">\n", tname);
311 if (!strcmp(tname, "xtargets"))
312 targets_termlist(c->wrbuf, s->psession, num);
315 p = termlist(s->psession, tname, &len);
317 for (i = 0; i < len && i < num; i++)
319 wrbuf_puts(c->wrbuf, "\n<term>");
320 wrbuf_printf(c->wrbuf, "<name>%s</name>", p[i]->term);
321 wrbuf_printf(c->wrbuf, "<frequency>%d</frequency>", p[i]->frequency);
322 wrbuf_puts(c->wrbuf, "</term>");
325 wrbuf_puts(c->wrbuf, "\n</list>");
330 wrbuf_puts(c->wrbuf, "</termlist>");
331 rs->payload = nmem_strdup(rq->channel->nmem, wrbuf_cstr(c->wrbuf));
332 http_send_response(c);
336 static void cmd_bytarget(struct http_channel *c)
338 struct http_response *rs = c->response;
339 struct http_request *rq = c->request;
340 struct http_session *s = locate_session(rq, rs);
341 struct hitsbytarget *ht;
346 if (!(ht = hitsbytarget(s->psession, &count)))
348 error(rs, "500", "Failed to retrieve hitcounts", 0);
351 wrbuf_rewind(c->wrbuf);
352 wrbuf_puts(c->wrbuf, "<bytarget><status>OK</status>");
354 for (i = 0; i < count; i++)
356 wrbuf_puts(c->wrbuf, "\n<target>");
357 wrbuf_printf(c->wrbuf, "<id>%s</id>\n", ht[i].id);
358 wrbuf_printf(c->wrbuf, "<hits>%d</hits>\n", ht[i].hits);
359 wrbuf_printf(c->wrbuf, "<diagnostic>%d</diagnostic>\n", ht[i].diagnostic);
360 wrbuf_printf(c->wrbuf, "<records>%d</records>\n", ht[i].records);
361 wrbuf_printf(c->wrbuf, "<state>%s</state>\n", ht[i].state);
362 wrbuf_puts(c->wrbuf, "</target>");
365 wrbuf_puts(c->wrbuf, "</bytarget>");
366 rs->payload = nmem_strdup(c->nmem, wrbuf_cstr(c->wrbuf));
367 http_send_response(c);
370 static void write_metadata(WRBUF w, struct conf_service *service,
371 struct record_metadata **ml, int full)
375 for (imeta = 0; imeta < service->num_metadata; imeta++)
377 struct conf_metadata *cmd = &service->metadata[imeta];
378 struct record_metadata *md;
379 if (!cmd->brief && !full)
381 for (md = ml[imeta]; md; md = md->next)
383 wrbuf_printf(w, "\n<md-%s>", cmd->name);
386 case Metadata_type_generic:
387 wrbuf_puts(w, md->data.text);
389 case Metadata_type_year:
390 wrbuf_printf(w, "%d", md->data.number.min);
391 if (md->data.number.min != md->data.number.max)
392 wrbuf_printf(w, "-%d", md->data.number.max);
395 wrbuf_puts(w, "[can't represent]");
397 wrbuf_printf(w, "</md-%s>", cmd->name);
402 static void write_subrecord(struct record *r, WRBUF w,
403 struct conf_service *service, int show_details)
405 char *name = session_setting_oneval(client_get_database(r->client), PZ_NAME);
407 wrbuf_printf(w, "<location id=\"%s\" name=\"%s\">",
408 client_get_database(r->client)->database->url,
409 *name ? name : "Unknown");
411 write_metadata(w, service, r->metadata, 1);
412 wrbuf_puts(w, "</location>\n");
415 static void cmd_record(struct http_channel *c)
417 struct http_response *rs = c->response;
418 struct http_request *rq = c->request;
419 struct http_session *s = locate_session(rq, rs);
420 struct record_cluster *rec;
422 struct conf_service *service = global_parameters.server->service;
423 char *idstr = http_argbyname(rq, "id");
430 error(rs, "417", "Must supply id", 0);
433 wrbuf_rewind(c->wrbuf);
435 if (!(rec = show_single(s->psession, id)))
437 error(rs, "500", "Record missing", 0);
440 wrbuf_puts(c->wrbuf, "<record>\n");
441 wrbuf_printf(c->wrbuf, "<recid>%d</recid>", rec->recid);
442 write_metadata(c->wrbuf, service, rec->metadata, 1);
443 for (r = rec->records; r; r = r->next)
444 write_subrecord(r, c->wrbuf, service, 1);
445 wrbuf_puts(c->wrbuf, "</record>\n");
446 rs->payload = nmem_strdup(c->nmem, wrbuf_cstr(c->wrbuf));
447 http_send_response(c);
450 static void show_records(struct http_channel *c, int active)
452 struct http_request *rq = c->request;
453 struct http_response *rs = c->response;
454 struct http_session *s = locate_session(rq, rs);
455 struct record_cluster **rl;
456 struct reclist_sortparms *sp;
457 char *start = http_argbyname(rq, "start");
458 char *num = http_argbyname(rq, "num");
459 char *sort = http_argbyname(rq, "sort");
469 // We haven't counted clients yet if we're called on a block release
471 active = session_active_clients(s->psession);
474 startn = atoi(start);
479 if (!(sp = reclist_parse_sortparms(c->nmem, sort)))
481 error(rs, "500", "Bad sort parameters", 0);
485 rl = show(s->psession, sp, startn, &numn, &total, &total_hits, c->nmem);
487 wrbuf_rewind(c->wrbuf);
488 wrbuf_puts(c->wrbuf, "<show>\n<status>OK</status>\n");
489 wrbuf_printf(c->wrbuf, "<activeclients>%d</activeclients>\n", active);
490 wrbuf_printf(c->wrbuf, "<merged>%d</merged>\n", total);
491 wrbuf_printf(c->wrbuf, "<total>%d</total>\n", total_hits);
492 wrbuf_printf(c->wrbuf, "<start>%d</start>\n", startn);
493 wrbuf_printf(c->wrbuf, "<num>%d</num>\n", numn);
495 for (i = 0; i < numn; i++)
499 struct record_cluster *rec = rl[i];
500 struct conf_service *service = global_parameters.server->service;
502 wrbuf_puts(c->wrbuf, "<hit>\n");
503 write_metadata(c->wrbuf, service, rec->metadata, 0);
504 for (ccount = 0, p = rl[i]->records; p; p = p->next, ccount++)
505 write_subrecord(p, c->wrbuf, service, 0); // subrecs w/o details
507 wrbuf_printf(c->wrbuf, "<count>%d</count>\n", ccount);
508 wrbuf_printf(c->wrbuf, "<recid>%d</recid>\n", rec->recid);
509 wrbuf_puts(c->wrbuf, "</hit>\n");
512 wrbuf_puts(c->wrbuf, "</show>\n");
513 rs->payload = nmem_strdup(c->nmem, wrbuf_cstr(c->wrbuf));
514 http_send_response(c);
517 static void show_records_ready(void *data)
519 struct http_channel *c = (struct http_channel *) data;
524 static void cmd_show(struct http_channel *c)
526 struct http_request *rq = c->request;
527 struct http_response *rs = c->response;
528 struct http_session *s = locate_session(rq, rs);
529 char *block = http_argbyname(rq, "block");
535 status = session_active_clients(s->psession);
539 if (status && (!s->psession->reclist || !s->psession->reclist->num_records))
541 session_set_watch(s->psession, SESSION_WATCH_RECORDS, show_records_ready, c);
542 yaz_log(YLOG_DEBUG, "Blocking on cmd_show");
547 show_records(c, status);
550 static void cmd_ping(struct http_channel *c)
552 struct http_request *rq = c->request;
553 struct http_response *rs = c->response;
554 struct http_session *s = locate_session(rq, rs);
557 rs->payload = "<ping><status>OK</status></ping>";
558 http_send_response(c);
561 static int utf_8_valid(const char *str)
563 yaz_iconv_t cd = yaz_iconv_open("utf-8", "utf-8");
566 /* check that query is UTF-8 encoded */
567 char *inbuf = (char *) str; /* we know iconv does not alter this */
568 size_t inbytesleft = strlen(inbuf);
570 size_t outbytesleft = strlen(inbuf) + 10;
571 char *out = xmalloc(outbytesleft);
573 size_t r = yaz_iconv(cd, &inbuf, &inbytesleft, &outbuf, &outbytesleft);
575 /* if OK, try flushing the rest */
576 if (r != (size_t) (-1))
577 r = yaz_iconv(cd, 0, 0, &outbuf, &outbytesleft);
580 if (r == (size_t) (-1))
586 static void cmd_search(struct http_channel *c)
588 struct http_request *rq = c->request;
589 struct http_response *rs = c->response;
590 struct http_session *s = locate_session(rq, rs);
591 char *query = http_argbyname(rq, "query");
592 char *filter = http_argbyname(rq, "filter");
599 error(rs, "417", "Must supply query", 0);
602 if (!utf_8_valid(query))
604 error(rs, "417", "Query not UTF-8 encoded", 0);
607 res = search(s->psession, query, filter);
610 error(rs, "417", res, 0);
613 rs->payload = "<search><status>OK</status></search>";
614 http_send_response(c);
618 static void cmd_stat(struct http_channel *c)
620 struct http_request *rq = c->request;
621 struct http_response *rs = c->response;
622 struct http_session *s = locate_session(rq, rs);
623 struct statistics stat;
629 clients = session_active_clients(s->psession);
630 statistics(s->psession, &stat);
632 wrbuf_rewind(c->wrbuf);
633 wrbuf_puts(c->wrbuf, "<stat>");
634 wrbuf_printf(c->wrbuf, "<activeclients>%d</activeclients>\n", clients);
635 wrbuf_printf(c->wrbuf, "<hits>%d</hits>\n", stat.num_hits);
636 wrbuf_printf(c->wrbuf, "<records>%d</records>\n", stat.num_records);
637 wrbuf_printf(c->wrbuf, "<clients>%d</clients>\n", stat.num_clients);
638 wrbuf_printf(c->wrbuf, "<unconnected>%d</unconnected>\n", stat.num_no_connection);
639 wrbuf_printf(c->wrbuf, "<connecting>%d</connecting>\n", stat.num_connecting);
640 wrbuf_printf(c->wrbuf, "<initializing>%d</initializing>\n", stat.num_initializing);
641 wrbuf_printf(c->wrbuf, "<searching>%d</searching>\n", stat.num_searching);
642 wrbuf_printf(c->wrbuf, "<presenting>%d</presenting>\n", stat.num_presenting);
643 wrbuf_printf(c->wrbuf, "<idle>%d</idle>\n", stat.num_idle);
644 wrbuf_printf(c->wrbuf, "<failed>%d</failed>\n", stat.num_failed);
645 wrbuf_printf(c->wrbuf, "<error>%d</error>\n", stat.num_error);
646 wrbuf_puts(c->wrbuf, "</stat>");
647 rs->payload = nmem_strdup(c->nmem, wrbuf_cstr(c->wrbuf));
648 http_send_response(c);
651 static void cmd_info(struct http_channel *c)
653 char yaz_version_str[20];
654 struct http_response *rs = c->response;
656 wrbuf_rewind(c->wrbuf);
657 wrbuf_puts(c->wrbuf, "<info>\n");
658 wrbuf_printf(c->wrbuf, " <version>\n");
659 wrbuf_printf(c->wrbuf, " <pazpar2>%s</pazpar2>\n", VERSION);
661 yaz_version(yaz_version_str, 0);
662 wrbuf_printf(c->wrbuf, " <yaz compiled=\"%s\">%s</yaz>\n",
663 YAZ_VERSION, yaz_version_str);
664 wrbuf_printf(c->wrbuf, " </version>\n");
666 wrbuf_puts(c->wrbuf, "</info>");
667 rs->payload = nmem_strdup(c->nmem, wrbuf_cstr(c->wrbuf));
668 http_send_response(c);
673 void (*fun)(struct http_channel *c);
675 { "init", cmd_init },
676 { "settings", cmd_settings },
677 { "stat", cmd_stat },
678 { "bytarget", cmd_bytarget },
679 { "show", cmd_show },
680 { "search", cmd_search },
681 { "termlist", cmd_termlist },
682 { "exit", cmd_exit },
683 { "ping", cmd_ping },
684 { "record", cmd_record },
685 { "info", cmd_info },
689 void http_command(struct http_channel *c)
691 char *command = http_argbyname(c->request, "command");
692 struct http_response *rs = http_create_response(c);
697 http_addheader(rs, "Expires", "Thu, 19 Nov 1981 08:52:00 GMT");
698 http_addheader(rs, "Cache-Control", "no-store, no-cache, must-revalidate, post-check=0, pre-check=0");
702 error(rs, "417", "Must supply command", 0);
705 for (i = 0; commands[i].name; i++)
706 if (!strcmp(commands[i].name, command))
708 (*commands[i].fun)(c);
711 if (!commands[i].name)
712 error(rs, "417", "Unknown command", command);
720 * indent-tabs-mode: nil
722 * vim: shiftwidth=4 tabstop=8 expandtab