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authorNot Zed <NotZed@Ximian.com>2002-01-14 17:35:52 +0800
committerMichael Zucci <zucchi@src.gnome.org>2002-01-14 17:35:52 +0800
commit345d090ac854ad26d2a19827d56f3d48382a1256 (patch)
tree43aed744bd98d91bfb0586e129094e4b1f263a0b /camel/providers/imap
parent7ace2ffaad1c6be679d29d5240512ceff35ea4a1 (diff)
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Rewritten to use a cache for body searches when online. Will need some
2002-01-14 Not Zed <NotZed@Ximian.com> * providers/imap/camel-imap-search.c (imap_body_contains): Rewritten to use a cache for body searches when online. Will need some heavy testing but so far seems to be beneficial. * providers/imap/camel-imap-folder.c (imap_search_by_expression, search_by_uids): dont initialise search object here. (camel_imap_folder_new): Setup search object here with pointer to cache dir. 2001-12-01 Not Zed <NotZed@Ximian.com> * camel-store-summary.[ch]: New class to store a store's folder list in. Not yet completed. svn path=/trunk/; revision=15314
Diffstat (limited to 'camel/providers/imap')
-rw-r--r--camel/providers/imap/camel-imap-folder.c8
-rw-r--r--camel/providers/imap/camel-imap-search.c474
-rw-r--r--camel/providers/imap/camel-imap-search.h13
3 files changed, 384 insertions, 111 deletions
diff --git a/camel/providers/imap/camel-imap-folder.c b/camel/providers/imap/camel-imap-folder.c
index 6939587f10..714e245643 100644
--- a/camel/providers/imap/camel-imap-folder.c
+++ b/camel/providers/imap/camel-imap-folder.c
@@ -226,6 +226,8 @@ camel_imap_folder_new (CamelStore *parent, const char *folder_name,
!g_strcasecmp (folder_name, "INBOX"))
folder->folder_flags |= CAMEL_FOLDER_FILTER_RECENT;
+ imap_folder->search = camel_imap_search_new(folder_dir);
+
return folder;
}
@@ -1314,9 +1316,6 @@ imap_search_by_expression (CamelFolder *folder, const char *expression, CamelExc
command channel too */
CAMEL_IMAP_FOLDER_LOCK(folder, search_lock);
- if (!imap_folder->search)
- imap_folder->search = camel_imap_search_new ();
-
camel_folder_search_set_folder (imap_folder->search, folder);
summary = camel_folder_get_summary(folder);
camel_folder_search_set_summary(imap_folder->search, summary);
@@ -1353,9 +1352,6 @@ imap_search_by_uids(CamelFolder *folder, const char *expression, GPtrArray *uids
CAMEL_IMAP_FOLDER_LOCK(folder, search_lock);
- if (imap_folder->search == NULL)
- imap_folder->search = camel_imap_search_new();
-
camel_folder_search_set_folder(imap_folder->search, folder);
camel_folder_search_set_summary(imap_folder->search, summary);
diff --git a/camel/providers/imap/camel-imap-search.c b/camel/providers/imap/camel-imap-search.c
index 2adaaef244..b184843f27 100644
--- a/camel/providers/imap/camel-imap-search.c
+++ b/camel/providers/imap/camel-imap-search.c
@@ -4,8 +4,9 @@
/*
* Authors:
* Dan Winship <danw@ximian.com>
+ * Michael Zucchi <notzed@ximian.com>
*
- * Copyright 2000, 2001 Ximian, Inc.
+ * Copyright 2000, 2001, 2002 Ximian, Inc.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of version 2 of the GNU General Public
@@ -35,10 +36,58 @@
#include "camel-imap-search.h"
#include "camel-imap-private.h"
#include "camel-imap-utils.h"
+#include "camel-imap-summary.h"
-static ESExpResult *
-imap_body_contains (struct _ESExp *f, int argc, struct _ESExpResult **argv,
- CamelFolderSearch *s);
+#include "e-util/md5-utils.h" /* md5 hash building */
+#include "camel-mime-utils.h" /* base64 encoding */
+
+#include "camel-seekable-stream.h"
+
+#define d(x) x
+
+/*
+ File is:
+ BODY (as in body search)
+ Last uid when search performed
+ termcount: number of search terms
+ matchcount: number of matches
+ term0, term1 ...
+ match0, match1, match2, ...
+*/
+
+/* size of in-memory cache */
+#define MATCH_CACHE_SIZE (32)
+
+/* Also takes care of 'endianness' file magic */
+#define MATCH_MARK (('B' << 24) | ('O' << 16) | ('D' << 8) | 'Y')
+
+/* on-disk header, in native endianness format, matches follow */
+struct _match_header {
+ guint32 mark;
+ guint32 validity; /* uidvalidity for this folder */
+ guint32 lastuid;
+ guint32 termcount;
+ guint32 matchcount;
+};
+
+/* in-memory record */
+struct _match_record {
+ struct _match_record *next;
+ struct _match_record *prev;
+
+ char hash[17];
+
+ guint32 lastuid;
+ guint32 validity;
+
+ unsigned int termcount;
+ char **terms;
+ GArray *matches;
+};
+
+
+static void free_match(CamelImapSearch *is, struct _match_record *mr);
+static ESExpResult *imap_body_contains (struct _ESExp *f, int argc, struct _ESExpResult **argv, CamelFolderSearch *s);
static CamelFolderSearchClass *imap_search_parent_class;
@@ -49,12 +98,33 @@ camel_imap_search_class_init (CamelImapSearchClass *camel_imap_search_class)
CamelFolderSearchClass *camel_folder_search_class =
CAMEL_FOLDER_SEARCH_CLASS (camel_imap_search_class);
- imap_search_parent_class = camel_type_get_global_classfuncs (camel_folder_search_get_type ());
+ imap_search_parent_class = (CamelFolderSearchClass *)camel_type_get_global_classfuncs (camel_folder_search_get_type ());
/* virtual method overload */
camel_folder_search_class->body_contains = imap_body_contains;
}
+static void
+camel_imap_search_init(CamelImapSearch *is)
+{
+ e_dlist_init(&is->matches);
+ is->matches_hash = g_hash_table_new(g_str_hash, g_str_equal);
+ is->matches_count = 0;
+ is->lastuid = 0;
+}
+
+static void
+camel_imap_search_finalise(CamelImapSearch *is)
+{
+ struct _match_record *mr;
+
+ while ( (mr = (struct _match_record *)e_dlist_remtail(&is->matches)) )
+ free_match(is, mr);
+ g_hash_table_destroy(is->matches_hash);
+ if (is->cache)
+ camel_object_unref((CamelObject *)is->cache);
+}
+
CamelType
camel_imap_search_get_type (void)
{
@@ -65,138 +135,334 @@ camel_imap_search_get_type (void)
CAMEL_FOLDER_SEARCH_TYPE, "CamelImapSearch",
sizeof (CamelImapSearch),
sizeof (CamelImapSearchClass),
- (CamelObjectClassInitFunc) camel_imap_search_class_init,
- NULL, NULL, NULL);
+ (CamelObjectClassInitFunc) camel_imap_search_class_init, NULL,
+ (CamelObjectInitFunc) camel_imap_search_init,
+ (CamelObjectFinalizeFunc) camel_imap_search_finalise);
}
return camel_imap_search_type;
}
+/**
+ * camel_imap_search_new:
+ *
+ * Return value: A new CamelImapSearch widget.
+ **/
+CamelFolderSearch *
+camel_imap_search_new (const char *cachedir)
+{
+ CamelFolderSearch *new = CAMEL_FOLDER_SEARCH (camel_object_new (camel_imap_search_get_type ()));
+ CamelImapSearch *is = (CamelImapSearch *)new;
+
+ camel_folder_search_construct (new);
+
+ is->cache = camel_data_cache_new(cachedir, 0, NULL);
+ if (is->cache) {
+ /* Expire entries after 14 days of inactivity */
+ camel_data_cache_set_expire_access(is->cache, 60*60*24*14);
+ }
+
+ return new;
+}
+
+
+static void
+hash_match(char hash[17], int argc, struct _ESExpResult **argv)
+{
+ MD5Context ctx;
+ unsigned char digest[16];
+ unsigned int state = 0, save = 0;
+ int i;
+
+ md5_init(&ctx);
+ for (i=0;i<argc;i++) {
+ if (argv[i]->type == ESEXP_RES_STRING)
+ md5_update(&ctx, argv[i]->value.string, strlen(argv[i]->value.string));
+ }
+ md5_final(&ctx, digest);
+
+ base64_encode_close(digest, 12, FALSE, hash, &state, &save);
+
+ for (i=0;i<16;i++) {
+ if (hash[i] == '+')
+ hash[i] = ',';
+ if (hash[i] == '/')
+ hash[i] = '_';
+ }
+
+ hash[16] = 0;
+}
+
static int
-cmp_uid(const void *ap, const void *bp)
+save_match(CamelImapSearch *is, struct _match_record *mr)
{
- unsigned int a, b;
+ guint32 mark = MATCH_MARK;
+ int ret = 0;
+ struct _match_header header;
+ CamelStream *stream;
- a = strtoul(((char **)ap)[0], NULL, 10);
- b = strtoul(((char **)bp)[0], NULL, 10);
- if (a<b)
+ /* since its a cache, doesn't matter if it doesn't save, at least we have the in-memory cache
+ for this session */
+ if (is->cache == NULL)
return -1;
- else if (a>b)
- return 1;
+
+ stream = camel_data_cache_add(is->cache, "search/body-contains", mr->hash, NULL);
+ if (stream == NULL)
+ return -1;
+
+ d(printf("Saving search cache entry to '%s': %s\n", mr->hash, mr->terms[0]));
+
+ /* we write the whole thing, then re-write the header magic, saves fancy sync code */
+ memcpy(&header.mark, " ", 4);
+ header.termcount = 0;
+ header.matchcount = mr->matches->len;
+ header.lastuid = mr->lastuid;
+ header.validity = mr->validity;
+
+ if (camel_stream_write(stream, (char *)&header, sizeof(header)) != sizeof(header)
+ || camel_stream_write(stream, mr->matches->data, mr->matches->len*sizeof(guint32)) != mr->matches->len*sizeof(guint32)
+ || camel_seekable_stream_seek((CamelSeekableStream *)stream, 0, CAMEL_STREAM_SET) == -1
+ || camel_stream_write(stream, (char *)&mark, sizeof(mark)) != sizeof(mark)) {
+ d(printf(" saving failed, removing cache entry\n"));
+ camel_data_cache_remove(is->cache, "search/body-contains", mr->hash, NULL);
+ ret = -1;
+ }
+
+ camel_object_unref((CamelObject *)stream);
+ return ret;
+}
+
+static void
+free_match(CamelImapSearch *is, struct _match_record *mr)
+{
+ int i;
+
+ for (i=0;i<mr->termcount;i++)
+ g_free(mr->terms[i]);
+ g_free(mr->terms);
+ g_array_free(mr->matches, TRUE);
+ g_free(mr);
+}
+
+static struct _match_record *
+load_match(CamelImapSearch *is, char hash[17], int argc, struct _ESExpResult **argv)
+{
+ struct _match_record *mr;
+ CamelStream *stream = NULL;
+ struct _match_header header;
+ int i;
+
+ mr = g_malloc0(sizeof(*mr));
+ mr->matches = g_array_new(0, 0, sizeof(guint32));
+ g_assert(strlen(hash) == 16);
+ strcpy(mr->hash, hash);
+ mr->terms = g_malloc0(sizeof(mr->terms[0]) * argc);
+ for (i=0;i<argc;i++) {
+ if (argv[i]->type == ESEXP_RES_STRING) {
+ mr->termcount++;
+ mr->terms[i] = g_strdup(argv[i]->value.string);
+ }
+ }
+
+ d(printf("Loading search cache entry to '%s': %s\n", mr->hash, mr->terms[0]));
+
+ memset(&header, 0, sizeof(header));
+ if (is->cache)
+ stream = camel_data_cache_get(is->cache, "search/body-contains", mr->hash, NULL);
+ if (stream != NULL) {
+ /* 'cause i'm gonna be lazy, i'm going to have the termcount == 0 for now,
+ and not load or save them since i can't think of a nice way to do it, the hash
+ should be sufficient to key it */
+ /* This check should also handle endianness changes, we just throw away
+ the data (its only a cache) */
+ if (camel_stream_read(stream, (char *)&header, sizeof(header)) == sizeof(header)
+ && header.validity == is->validity
+ && header.mark == MATCH_MARK
+ && header.termcount == 0) {
+ d(printf(" found %d matches\n", header.matchcount));
+ g_array_set_size(mr->matches, header.matchcount);
+ camel_stream_read(stream, mr->matches->data, sizeof(guint32)*header.matchcount);
+ } else {
+ d(printf(" file format invalid/validity changed\n"));
+ memset(&header, 0, sizeof(header));
+ }
+ camel_object_unref((CamelObject *)stream);
+ } else {
+ d(printf(" no cache entry found\n"));
+ }
+
+ mr->validity = header.validity;
+ if (mr->validity != is->validity)
+ mr->lastuid = 0;
+ else
+ mr->lastuid = header.lastuid;
+
+ return mr;
+}
+
+static int
+sync_match(CamelImapSearch *is, struct _match_record *mr)
+{
+ char *p, *result, *lasts = NULL;
+ CamelImapResponse *response;
+ guint32 uid;
+ CamelFolder *folder = ((CamelFolderSearch *)is)->folder;
+ CamelImapStore *store = (CamelImapStore *)folder->parent_store;
+
+ if (mr->lastuid >= is->lastuid && mr->validity == is->validity)
+ return 0;
+
+ d(printf("updating match record for uid's %d:%d\n", mr->lastuid+1, is->lastuid));
+
+ /* TODO: Handle multiple search terms */
+
+ response = camel_imap_command (store, folder, NULL,
+ "UID SEARCH UID %d:%d BODY \"%s\"",
+ mr->lastuid+1, is->lastuid, mr->terms[0]);
+ if (!response)
+ return -1;
+ result = camel_imap_response_extract (store, response, "SEARCH", NULL);
+ if (!result)
+ return -1;
+
+ p = result + sizeof ("* SEARCH");
+ for (p = strtok_r (p, " ", &lasts); p; p = strtok_r (NULL, " ", &lasts)) {
+ uid = strtoul(p, NULL, 10);
+ g_array_append_vals(mr->matches, &uid, 1);
+ }
+ g_free(result);
+
+ mr->validity = is->validity;
+ mr->lastuid = is->lastuid;
+ save_match(is, mr);
return 0;
}
+static struct _match_record *
+get_match(CamelImapSearch *is, int argc, struct _ESExpResult **argv)
+{
+ char hash[17];
+ struct _match_record *mr;
+
+ hash_match(hash, argc, argv);
+
+ mr = g_hash_table_lookup(is->matches_hash, hash);
+ if (mr == NULL) {
+ while (is->matches_count >= MATCH_CACHE_SIZE) {
+ mr = (struct _match_record *)e_dlist_remtail(&is->matches);
+ if (mr) {
+ printf("expiring match '%s' (%s)\n", mr->hash, mr->terms[0]);
+ g_hash_table_remove(is->matches_hash, mr->hash);
+ free_match(is, mr);
+ is->matches_count--;
+ } else {
+ is->matches_count = 0;
+ }
+ }
+ mr = load_match(is, hash, argc, argv);
+ g_hash_table_insert(is->matches_hash, mr->hash, mr);
+ is->matches_count++;
+ } else {
+ e_dlist_remove((EDListNode *)mr);
+ }
+
+ e_dlist_addhead(&is->matches, (EDListNode *)mr);
+
+ /* what about offline mode? */
+ /* We could cache those results too, or should we cache them elsewhere? */
+ sync_match(is, mr);
+
+ return mr;
+}
+
static ESExpResult *
-imap_body_contains (struct _ESExp *f, int argc, struct _ESExpResult **argv,
- CamelFolderSearch *s)
+imap_body_contains (struct _ESExp *f, int argc, struct _ESExpResult **argv, CamelFolderSearch *s)
{
CamelImapStore *store = CAMEL_IMAP_STORE (s->folder->parent_store);
- char *value = argv[0]->value.string;
- CamelImapResponse *response = NULL;
- char *result, *p, *lasts = NULL, *real_uid;
- const char *uid = "";
+ CamelImapSearch *is = (CamelImapSearch *)s;
+ char *uid;
ESExpResult *r;
- CamelMessageInfo *info;
+ CamelMessageInfo *info;
GHashTable *uid_hash = NULL;
- char *set;
- GPtrArray *sorted;
- int i;
+ GPtrArray *array;
+ int i, j;
+ struct _match_record *mr;
+ guint32 uidn, *uidp;
+
+ d(printf("Performing body search '%s'\n", argv[0]->value.string));
+
+ /* TODO: Cache offline searches too? */
/* If offline, search using the parent class, which can handle this manually */
if (!camel_disco_store_check_online (CAMEL_DISCO_STORE (store), NULL))
return imap_search_parent_class->body_contains(f, argc, argv, s);
- if (s->current) {
- uid = camel_message_info_uid (s->current);
- r = e_sexp_result_new (f, ESEXP_RES_BOOL);
- r->value.bool = FALSE;
- response = camel_imap_command (store, s->folder, NULL,
- "UID SEARCH UID %s BODY \"%s\"",
- uid, value);
- } else {
- r = e_sexp_result_new (f, ESEXP_RES_ARRAY_PTR);
-
- if (argc == 1 && *value == '\0' && s->folder) {
- /* optimise the match "" case - match everything */
+ /* optimise the match "" case - match everything */
+ if (argc == 1 && argv[0]->value.string[0] == '\0') {
+ if (s->current) {
+ r = e_sexp_result_new(f, ESEXP_RES_BOOL);
+ r->value.bool = TRUE;
+ } else {
+ r = e_sexp_result_new(f, ESEXP_RES_ARRAY_PTR);
r->value.ptrarray = g_ptr_array_new ();
for (i = 0; i < s->summary->len; i++) {
- CamelMessageInfo *info = g_ptr_array_index (s->summary, i);
- g_ptr_array_add (r->value.ptrarray, (char *)camel_message_info_uid (info));
+ info = g_ptr_array_index(s->summary, i);
+ g_ptr_array_add(r->value.ptrarray, (char *)camel_message_info_uid(info));
}
+ }
+ } else if (s->summary->len == 0) {
+ /* nothing to match case, do nothing (should be handled higher up?) */
+ if (s->current) {
+ r = e_sexp_result_new(f, ESEXP_RES_BOOL);
+ r->value.bool = FALSE;
} else {
- /* If searching a (reasonably small) subset of
- the real folder size, then use a
- message-set to optimise it */
- /* TODO: This peeks a bunch of 'private'ish data */
- if (s->summary->len < camel_folder_get_message_count(s->folder)/2) {
- sorted = g_ptr_array_new();
- g_ptr_array_set_size(sorted, s->summary->len);
- for (i=0;i<s->summary->len;i++)
- sorted->pdata[i] = (void *)camel_message_info_uid((CamelMessageInfo *)s->summary->pdata[i]);
- qsort(sorted->pdata, sorted->len, sizeof(sorted->pdata[0]), cmp_uid);
- set = imap_uid_array_to_set(s->folder->summary, sorted);
- response = camel_imap_command (store, s->folder, NULL,
- "UID SEARCH UID %s BODY \"%s\"",
- set, value);
- g_free(set);
- g_ptr_array_free(sorted, TRUE);
- } else {
- response = camel_imap_command (store, s->folder, NULL,
- "UID SEARCH BODY \"%s\"",
- value);
- }
-
+ r = e_sexp_result_new(f, ESEXP_RES_ARRAY_PTR);
r->value.ptrarray = g_ptr_array_new ();
}
- }
-
- if (!response)
- return r;
- result = camel_imap_response_extract (store, response, "SEARCH", NULL);
- if (!result)
- return r;
-
- p = result + sizeof ("* SEARCH");
- for (p = strtok_r (p, " ", &lasts); p; p = strtok_r (NULL, " ", &lasts)) {
+ } else {
+ int truth = FALSE;
+
+ /* setup lastuid/validity for synchronising */
+ info = g_ptr_array_index(s->summary, s->summary->len-1);
+ is->lastuid = strtoul(camel_message_info_uid(info), NULL, 10);
+ is->validity = ((CamelImapSummary *)(s->folder->summary))->validity;
+
+ mr = get_match(is, argc, argv);
+
if (s->current) {
- if (!strcmp (uid, p)) {
- r->value.bool = TRUE;
- break;
- }
+ uidn = strtoul(camel_message_info_uid(s->current), NULL, 10);
+ uidp = (guint32 *)mr->matches->data;
+ j = mr->matches->len;
+ for (i=0;i<j && !truth;i++)
+ truth = *uidp++ == uidn;
+ r = e_sexp_result_new(f, ESEXP_RES_BOOL);
+ r->value.bool = truth;
} else {
- /* if we need to setup a hash of summary items, this way we get
- access to the summary memory which is locked for the duration of
- the search, and wont vanish on us */
- if (uid_hash == NULL) {
- uid_hash = g_hash_table_new (g_str_hash, g_str_equal);
- for (i = 0; i < s->summary->len; i++) {
- info = s->summary->pdata[i];
- g_hash_table_insert (uid_hash, (char *)camel_message_info_uid (info), info);
- }
+ r = e_sexp_result_new(f, ESEXP_RES_ARRAY_PTR);
+ array = r->value.ptrarray = g_ptr_array_new();
+
+ /* We use a hash to map the uid numbers to uid strings as required by the search api */
+ /* We use the summary's strings so we dont need to alloc more */
+ uid_hash = g_hash_table_new(NULL, NULL);
+ for (i = 0; i < s->summary->len; i++) {
+ info = s->summary->pdata[i];
+ uid = (char *)camel_message_info_uid(info);
+ uidn = strtoul(uid, NULL, 10);
+ g_hash_table_insert(uid_hash, (void *)uidn, uid);
}
- if (g_hash_table_lookup_extended (uid_hash, p, (void *)&real_uid, (void *)&info))
- g_ptr_array_add (r->value.ptrarray, real_uid);
+
+ uidp = (guint32 *)mr->matches->data;
+ j = mr->matches->len;
+ for (i=0;i<j && !truth;i++) {
+ uid = g_hash_table_lookup(uid_hash, (void *)*uidp++);
+ if (uid)
+ g_ptr_array_add(array, uid);
+ }
+
+ g_hash_table_destroy(uid_hash);
}
}
-
- /* we could probably cache this globally, but its probably not worth it */
- if (uid_hash)
- g_hash_table_destroy (uid_hash);
-
- return r;
-}
-/**
- * camel_imap_search_new:
- *
- * Return value: A new CamelImapSearch widget.
- **/
-CamelFolderSearch *
-camel_imap_search_new (void)
-{
- CamelFolderSearch *new = CAMEL_FOLDER_SEARCH (camel_object_new (camel_imap_search_get_type ()));
-
- camel_folder_search_construct (new);
- return new;
+ return r;
}
diff --git a/camel/providers/imap/camel-imap-search.h b/camel/providers/imap/camel-imap-search.h
index 44335f0e82..9d1694c2c9 100644
--- a/camel/providers/imap/camel-imap-search.h
+++ b/camel/providers/imap/camel-imap-search.h
@@ -27,6 +27,8 @@
#define _CAMEL_IMAP_SEARCH_H
#include <camel/camel-folder-search.h>
+#include <e-util/e-msgport.h>
+#include <camel/camel-data-cache.h>
#define CAMEL_IMAP_SEARCH_TYPE (camel_imap_search_get_type ())
#define CAMEL_IMAP_SEARCH(obj) CAMEL_CHECK_CAST (obj, camel_imap_search_get_type (), CamelImapSearch)
@@ -38,6 +40,15 @@ typedef struct _CamelImapSearchClass CamelImapSearchClass;
struct _CamelImapSearch {
CamelFolderSearch parent;
+ guint32 lastuid; /* current 'last uid' for the folder */
+ guint32 validity; /* validity of the current folder */
+
+ CamelDataCache *cache; /* disk-cache for searches */
+
+ /* cache of body search matches */
+ unsigned int matches_count;
+ EDList matches;
+ GHashTable *matches_hash;
};
struct _CamelImapSearchClass {
@@ -46,6 +57,6 @@ struct _CamelImapSearchClass {
};
guint camel_imap_search_get_type (void);
-CamelFolderSearch *camel_imap_search_new (void);
+CamelFolderSearch *camel_imap_search_new (const char *cachedir);
#endif /* ! _CAMEL_IMAP_SEARCH_H */