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Compute server time from http header and adjust mtimes.

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Klaas Freitag 2012-07-03 14:38:43 +02:00
parent 98bc5098c9
commit c263a39334
1 changed files with 52 additions and 2 deletions
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54
modules/csync_owncloud.c
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@ -119,6 +119,10 @@ struct dav_session_s {
ne_session *ctx;
char *user;
char *pwd;
time_t time_delta; /* The time delta to use. */
long int time_delta_sum; /* What is the time delta average? */
int time_delta_cnt; /* How often was the server time gathered? */
};
/* The list of properties that is fetched in PropFind on a collection */
@ -347,6 +351,9 @@ static int dav_connect(const char *base_url) {
return 0;
}
dav_session.time_delta_sum = 0;
dav_session.time_delta_cnt = 0;
rc = c_parse_uri( base_url, &scheme, &dav_session.user, &dav_session.pwd, &host, &port, &path );
if( rc < 0 ) {
DEBUG_WEBDAV("Failed to parse uri %s", base_url );
@ -505,14 +512,51 @@ static int fetch_resource_list( const char *curi,
struct listdir_context *fetchCtx )
{
int ret = 0;
ne_propfind_handler *hdl = NULL;
ne_request *request = NULL;
const char *date_header = NULL;
time_t server_time;
time_t now;
time_t time_diff;
time_t time_diff_delta;
/* do a propfind request and parse the results in the results function, set as callback */
ret = ne_simple_propfind( dav_session.ctx, curi, depth, ls_props, results, fetchCtx );
/* ret = ne_simple_propfind( dav_session.ctx, curi, depth, ls_props, results, fetchCtx ); */
hdl = ne_propfind_create(dav_session.ctx, curi, depth);
ret = ne_propfind_named(hdl, ls_props, results, fetchCtx);
if( ret == NE_OK ) {
DEBUG_WEBDAV("Simple propfind OK.");
fetchCtx->currResource = fetchCtx->list;
request = ne_propfind_get_request( hdl );
date_header = ne_get_response_header( request, "Date" );
DEBUG_WEBDAV("Server Date from HTTP header value: %s", date_header);
server_time = ne_rfc1123_parse( date_header );
now = time(NULL);
time_diff = server_time - now;
dav_session.time_delta_sum += time_diff;
dav_session.time_delta_cnt++;
/* check the changing of the time delta */
time_diff_delta = llabs(dav_session.time_delta - time_diff);
if( time_diff_delta > 5 ) {
DEBUG_WEBDAV("WRN: The time delta changed more than 5 second");
} else if( time_diff_delta == 0) {
DEBUG_WEBDAV("Ok: Time delta remained the same.");
} else {
DEBUG_WEBDAV("Difference to last server time delta: %d", time_diff_delta );
}
dav_session.time_delta = time_diff;
/* DEBUG_WEBDAV("%d <0> %d", server_time, now); */
dav_session.time_delta = time_diff;
}
ne_propfind_destroy(hdl);
return ret;
}
@ -545,7 +589,13 @@ static csync_vio_file_stat_t *resourceToFileStat( struct resource *res )
DEBUG_WEBDAV("ERROR: Unknown resource type %d", res->type);
}
lfs->mtime = res->modtime;
/* Correct the mtime of the file with the server time delta */
if( dav_session.time_delta_cnt == 0 ) {
DEBUG_WEBDAV("WRN: Delta time not yet computed.");
lfs->mtime = res->modtime;
} else {
lfs->mtime = res->modtime + dav_session.time_delta;
}
lfs->fields |= CSYNC_VIO_FILE_STAT_FIELDS_MTIME;
lfs->size = res->size;
lfs->fields |= CSYNC_VIO_FILE_STAT_FIELDS_SIZE;