1 files changed, 365 insertions, 0 deletions

diff --git a/libetpan/src/driver/implementation/nntp/nntpdriver_cached_message.c b/libetpan/src/driver/implementation/nntp/nntpdriver_cached_message.c
new file mode 100644
index 0000000..131b689
--- a/dev/null
+++ b/libetpan/src/driver/implementation/nntp/nntpdriver_cached_message.c
@@ -0,0 +1,365 @@
+/*
+ * libEtPan! -- a mail stuff library
+ *
+ * Copyright (C) 2001, 2005 - DINH Viet Hoa
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the libEtPan! project nor the names of its
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+/*
+ * $Id$
+ */
+
+#include "nntpdriver_cached_message.h"
+
+#include <string.h>
+#include <stdlib.h>
+
+#include "mail_cache_db.h"
+
+#include "mailmessage.h"
+#include "mailmessage_tools.h"
+#include "nntpdriver.h"
+#include "nntpdriver_tools.h"
+#include "nntpdriver_cached.h"
+#include "nntpdriver_message.h"
+#include "generic_cache.h"
+
+static int nntp_prefetch(mailmessage * msg_info);
+
+static void nntp_prefetch_free(struct generic_message_t * msg);
+
+static int nntp_initialize(mailmessage * msg_info);
+
+static int nntp_fetch_header(mailmessage * msg_info,
+                             char ** result,
+                             size_t * result_len);
+
+static int nntp_fetch_size(mailmessage * msg_info,
+                           size_t * result);
+
+static void nntp_uninitialize(mailmessage * msg_info);
+
+static void nntp_flush(mailmessage * msg_info);
+
+static void nntp_check(mailmessage * msg_info);
+
+static int nntp_get_flags(mailmessage * msg_info,
+                          struct mail_flags ** result);
+
+static mailmessage_driver local_nntp_cached_message_driver = {
+  .msg_name = "nntp-cached",
+
+  .msg_initialize = nntp_initialize,
+  .msg_uninitialize = nntp_uninitialize,
+
+  .msg_flush = nntp_flush,
+  .msg_check = nntp_check,
+
+  .msg_fetch_result_free = mailmessage_generic_fetch_result_free,
+
+  .msg_fetch = mailmessage_generic_fetch,
+  .msg_fetch_header = nntp_fetch_header,
+  .msg_fetch_body = mailmessage_generic_fetch_body,
+  .msg_fetch_size = nntp_fetch_size,
+  .msg_get_bodystructure = mailmessage_generic_get_bodystructure,
+  .msg_fetch_section = mailmessage_generic_fetch_section,
+  .msg_fetch_section_header = mailmessage_generic_fetch_section_header,
+  .msg_fetch_section_mime = mailmessage_generic_fetch_section_mime,
+  .msg_fetch_section_body = mailmessage_generic_fetch_section_body,
+  .msg_fetch_envelope = mailmessage_generic_fetch_envelope,
+
+  .msg_get_flags = nntp_get_flags,
+};
+
+mailmessage_driver * nntp_cached_message_driver =
+&local_nntp_cached_message_driver;
+
+static inline struct nntp_cached_session_state_data *
+get_cached_session_data(mailmessage * msg)
+{
+  return msg->msg_session->sess_data;
+}
+
+static inline mailsession * get_ancestor_session(mailmessage * msg)
+{
+  return get_cached_session_data(msg)->nntp_ancestor;
+}
+
+static inline struct nntp_session_state_data *
+get_ancestor_session_data(mailmessage * msg)
+{
+  return get_ancestor_session(msg)->sess_data;
+}
+
+static inline newsnntp *
+get_nntp_session(mailmessage * msg)
+{
+  return get_ancestor_session_data(msg)->nntp_session;
+}
+
+static int nntp_prefetch(mailmessage * msg_info)
+{
+  char * msg_content;
+  size_t msg_length;
+  struct generic_message_t * msg;
+  int r;
+  struct nntp_cached_session_state_data * cached_data;
+  struct nntp_session_state_data * ancestor_data;
+  char filename[PATH_MAX];
+
+  /* we try the cached message */
+
+  cached_data = get_cached_session_data(msg_info);
+
+  ancestor_data = get_ancestor_session_data(msg_info);
+
+  snprintf(filename, PATH_MAX, "%s/%s/%i", cached_data->nntp_cache_directory,
+      ancestor_data->nntp_group_name, msg_info->msg_index);
+  
+  r = generic_cache_read(filename, &msg_content, &msg_length);
+  if (r == MAIL_NO_ERROR) {
+    msg = msg_info->msg_data;
+
+    msg->msg_message = msg_content;
+    msg->msg_length = msg_length;
+
+    return MAIL_NO_ERROR;
+  }
+
+  /* we get the message through the network */
+
+  r = nntpdriver_article(get_ancestor_session(msg_info),
+      msg_info->msg_index, &msg_content,
+      &msg_length);
+
+  if (r != MAIL_NO_ERROR)
+    return r;
+
+  /* we write the message cache */
+
+  generic_cache_store(filename, msg_content, msg_length);
+
+  msg = msg_info->msg_data;
+
+  msg->msg_message = msg_content;
+  msg->msg_length = msg_length;
+
+  return MAIL_NO_ERROR;
+}
+
+static void nntp_prefetch_free(struct generic_message_t * msg)
+{
+  if (msg->msg_message != NULL) {
+    mmap_string_unref(msg->msg_message);
+    msg->msg_message = NULL;
+  }
+}
+
+static int nntp_initialize(mailmessage * msg_info)
+{
+  struct generic_message_t * msg;
+  int r;
+  char * uid;
+  char static_uid[20];
+
+  snprintf(static_uid, 20, "%u", msg_info->msg_index);
+  uid = strdup(static_uid);
+  if (uid == NULL)
+    return MAIL_ERROR_MEMORY;
+  
+  r = mailmessage_generic_initialize(msg_info);
+  if (r != MAIL_NO_ERROR) {
+    free(uid);
+    return r;
+  }
+
+  msg = msg_info->msg_data;
+  msg->msg_prefetch = nntp_prefetch;
+  msg->msg_prefetch_free = nntp_prefetch_free;
+  msg_info->msg_uid = uid;
+
+  return MAIL_NO_ERROR;
+}
+
+
+static void nntp_uninitialize(mailmessage * msg_info)
+{
+  mailmessage_generic_uninitialize(msg_info);
+}
+
+#define FLAGS_NAME "flags.db"
+
+static void nntp_flush(mailmessage * msg_info)
+{
+  mailmessage_generic_flush(msg_info);
+}
+
+
+static void nntp_check(mailmessage * msg_info)
+{
+  int r;
+
+  if (msg_info->msg_flags != NULL) {
+    r = mail_flags_store_set(get_cached_session_data(msg_info)->nntp_flags_store,
+        msg_info);
+    /* ignore errors */
+  }
+}
+     
+static int nntp_fetch_header(mailmessage * msg_info,
+                             char ** result,
+                             size_t * result_len)
+{
+  struct generic_message_t * msg;
+  char * headers;
+  size_t headers_length;
+  struct nntp_cached_session_state_data * cached_data;
+  struct nntp_session_state_data * ancestor_data;
+  int r;
+  char filename[PATH_MAX];
+
+  msg = msg_info->msg_data;
+
+  if (msg->msg_message != NULL)
+    return mailmessage_generic_fetch_header(msg_info,
+        result, result_len);
+  
+  /* we try the cached message */
+  
+  cached_data = get_cached_session_data(msg_info);
+
+  ancestor_data = get_ancestor_session_data(msg_info);
+
+  snprintf(filename, PATH_MAX, "%s/%s/%i-header",
+      cached_data->nntp_cache_directory,
+      ancestor_data->nntp_group_name, msg_info->msg_index);
+
+  r = generic_cache_read(filename, &headers, &headers_length);
+  if (r == MAIL_NO_ERROR) {
+    * result = headers;
+    * result_len = headers_length;
+
+    return MAIL_NO_ERROR;
+  }
+
+  /* we get the message through the network */
+
+  r = nntpdriver_head(get_ancestor_session(msg_info), msg_info->msg_index,
+                      &headers, &headers_length);
+  if (r != MAIL_NO_ERROR)
+    return r;
+
+  /* we write the message cache */
+
+  generic_cache_store(filename, headers, headers_length);
+
+  * result = headers;
+  * result_len = headers_length;
+
+  return MAIL_NO_ERROR;
+}
+
+static int nntp_fetch_size(mailmessage * msg_info,
+                           size_t * result)
+{
+  return nntpdriver_size(get_ancestor_session(msg_info),
+      msg_info->msg_index, result);
+}
+
+static int nntp_get_flags(mailmessage * msg_info,
+    struct mail_flags ** result)
+{
+  int r;
+  struct mail_flags * flags;
+  struct mail_cache_db * cache_db_flags;
+  char filename_flags[PATH_MAX];
+  int res;
+  MMAPString * mmapstr;
+
+  if (msg_info->msg_flags != NULL) {
+    * result = msg_info->msg_flags;
+    
+    return MAIL_NO_ERROR;
+  }
+
+  flags = mail_flags_store_get(get_cached_session_data(msg_info)->nntp_flags_store, msg_info->msg_index);
+
+  if (flags == NULL) {
+    struct nntp_cached_session_state_data * cached_data;
+    struct nntp_session_state_data * ancestor_data;
+    
+    cached_data = get_cached_session_data(msg_info);
+    
+    ancestor_data = get_ancestor_session_data(msg_info);
+    if (ancestor_data->nntp_group_name == NULL) {
+      res = MAIL_ERROR_BAD_STATE;
+      goto err;
+    }
+    
+    snprintf(filename_flags, PATH_MAX, "%s/%s/%s",
+        cached_data->nntp_flags_directory,
+        ancestor_data->nntp_group_name, FLAGS_NAME);
+    
+    r = mail_cache_db_open_lock(filename_flags, &cache_db_flags);
+    if (r < 0) {
+      res = MAIL_ERROR_MEMORY;
+      goto err;
+    }
+    
+    mmapstr = mmap_string_new("");
+    if (mmapstr == NULL) {
+      res = MAIL_ERROR_MEMORY;
+      goto close_db_flags;
+    }
+    
+    r = nntpdriver_get_cached_flags(cache_db_flags, mmapstr,
+        msg_info->msg_index, &flags);
+    if (r != MAIL_NO_ERROR) {
+      flags = mail_flags_new_empty();
+      if (flags == NULL) {
+        res = MAIL_ERROR_MEMORY;
+        goto free_mmapstr;
+      }
+    }
+
+    mmap_string_free(mmapstr);
+    mail_cache_db_close_unlock(filename_flags, cache_db_flags);
+  }
+
+  msg_info->msg_flags = flags;
+
+  * result = flags;
+
+  return MAIL_NO_ERROR;
+
+ free_mmapstr:
+  mmap_string_free(mmapstr);
+ close_db_flags:
+  mail_cache_db_close_unlock(filename_flags, cache_db_flags);
+ err:
+  return res;
+}