2 d5af38cc 2022-01-10 op * Copyright (c) 2022 Omar Polo <op@omarpolo.com>
4 d5af38cc 2022-01-10 op * Permission to use, copy, modify, and distribute this software for any
5 d5af38cc 2022-01-10 op * purpose with or without fee is hereby granted, provided that the above
6 d5af38cc 2022-01-10 op * copyright notice and this permission notice appear in all copies.
8 d5af38cc 2022-01-10 op * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 d5af38cc 2022-01-10 op * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 d5af38cc 2022-01-10 op * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 d5af38cc 2022-01-10 op * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 d5af38cc 2022-01-10 op * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 d5af38cc 2022-01-10 op * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 d5af38cc 2022-01-10 op * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 d5af38cc 2022-01-10 op #include "compat.h"
19 d5af38cc 2022-01-10 op #include <stdlib.h>
20 d5af38cc 2022-01-10 op #include <stdint.h>
21 d5af38cc 2022-01-10 op #include <string.h>
23 d5af38cc 2022-01-10 op #include "telescope.h"
24 d5af38cc 2022-01-10 op #include "mcache.h"
25 8f3c9af8 2022-01-11 op #include "parser.h"
26 9d65b1d9 2022-01-11 op #include "utils.h"
28 946d3439 2022-01-12 op static struct timeval tv = { 5 * 60, 0 };
29 4b4c3458 2022-01-11 op static struct event timerev;
31 a96922a1 2022-01-11 op static struct ohash h;
32 a96922a1 2022-01-11 op static size_t npages;
33 a96922a1 2022-01-11 op static size_t tot;
35 d5af38cc 2022-01-10 op struct mcache_entry {
37 fe84b750 2022-01-19 op parserfn parser;
39 d5af38cc 2022-01-10 op struct evbuffer *evb;
44 ffcd827c 2022-01-11 op mcache_free_entry(const char *url)
46 ffcd827c 2022-01-11 op struct mcache_entry *e;
47 ffcd827c 2022-01-11 op unsigned int slot;
49 a96922a1 2022-01-11 op slot = ohash_qlookup(&h, url);
50 a96922a1 2022-01-11 op if ((e = ohash_remove(&h, slot)) == NULL)
54 a96922a1 2022-01-11 op tot -= EVBUFFER_LENGTH(e->evb);
56 ffcd827c 2022-01-11 op evbuffer_free(e->evb);
61 4b4c3458 2022-01-11 op clean_old_entries(int fd, short ev, void *data)
63 4b4c3458 2022-01-11 op struct mcache_entry *e;
64 4b4c3458 2022-01-11 op unsigned int i;
65 4b4c3458 2022-01-11 op time_t treshold;
67 946d3439 2022-01-12 op /* delete pages older than an hour */
68 946d3439 2022-01-12 op treshold = time(NULL) - 60 * 60;
70 a96922a1 2022-01-11 op for (e = ohash_first(&h, &i); e != NULL; e = ohash_next(&h, &i))
71 4b4c3458 2022-01-11 op if (e->ts < treshold)
72 4b4c3458 2022-01-11 op mcache_free_entry(e->url);
74 4b4c3458 2022-01-11 op evtimer_add(&timerev, &tv);
78 d5af38cc 2022-01-10 op mcache_init(void)
80 d5af38cc 2022-01-10 op struct ohash_info info = {
81 d5af38cc 2022-01-10 op .key_offset = offsetof(struct mcache_entry, url),
82 d5af38cc 2022-01-10 op .calloc = hash_calloc,
83 d5af38cc 2022-01-10 op .free = hash_free,
84 d5af38cc 2022-01-10 op .alloc = hash_alloc,
87 a96922a1 2022-01-11 op ohash_init(&h, 5, &info);
89 4b4c3458 2022-01-11 op evtimer_set(&timerev, clean_old_entries, NULL);
93 8f3c9af8 2022-01-11 op mcache_tab(struct tab *tab)
95 d5af38cc 2022-01-10 op struct mcache_entry *e;
96 d5af38cc 2022-01-10 op unsigned int slot;
97 d5af38cc 2022-01-10 op size_t l, len;
98 8f3c9af8 2022-01-11 op const char *url;
100 8f3c9af8 2022-01-11 op url = tab->hist_cur->h;
101 d5af38cc 2022-01-10 op l = strlen(url);
102 d5af38cc 2022-01-10 op len = sizeof(*e) + l + 1;
104 d5af38cc 2022-01-10 op if ((e = calloc(1, len)) == NULL)
106 4b4c3458 2022-01-11 op e->ts = time(NULL);
107 fe84b750 2022-01-19 op e->parser = tab->buffer.page.init;
108 8f3c9af8 2022-01-11 op e->trust = tab->trust;
109 d5af38cc 2022-01-10 op memcpy(e->url, url, l);
111 d5af38cc 2022-01-10 op if ((e->evb = evbuffer_new()) == NULL)
114 fe84b750 2022-01-19 op if (!parser_serialize(tab, e->evb))
117 ffcd827c 2022-01-11 op /* free any previously cached copies of this page */
118 ffcd827c 2022-01-11 op mcache_free_entry(url);
120 a96922a1 2022-01-11 op slot = ohash_qlookup(&h, url);
121 a96922a1 2022-01-11 op ohash_insert(&h, slot, e);
124 a96922a1 2022-01-11 op tot += EVBUFFER_LENGTH(e->evb);
126 4b4c3458 2022-01-11 op if (!evtimer_pending(&timerev, NULL))
127 4b4c3458 2022-01-11 op evtimer_add(&timerev, &tv);
132 d5af38cc 2022-01-10 op if (e->evb != NULL)
133 d5af38cc 2022-01-10 op evbuffer_free(e->evb);
139 8f3c9af8 2022-01-11 op mcache_lookup(const char *url, struct tab *tab)
141 d5af38cc 2022-01-10 op struct mcache_entry *e;
142 d5af38cc 2022-01-10 op unsigned int slot;
144 a96922a1 2022-01-11 op slot = ohash_qlookup(&h, url);
145 a96922a1 2022-01-11 op if ((e = ohash_find(&h, slot)) == NULL)
148 fe84b750 2022-01-19 op parser_init(tab, e->parser);
149 8f3c9af8 2022-01-11 op if (!parser_parse(tab, EVBUFFER_DATA(e->evb), EVBUFFER_LENGTH(e->evb)))
151 8f3c9af8 2022-01-11 op if (!parser_free(tab))
154 8f3c9af8 2022-01-11 op tab->trust = e->trust;
158 8f3c9af8 2022-01-11 op parser_free(tab);
159 8f3c9af8 2022-01-11 op erase_buffer(&tab->buffer);
164 a96922a1 2022-01-11 op mcache_info(size_t *r_npages, size_t *r_tot)
166 a96922a1 2022-01-11 op *r_npages = npages;
167 a96922a1 2022-01-11 op *r_tot = tot;