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nextcloud-desktop/modules/csync_owncloud.c
Klaas Freitag 373746c296 Fix crash in case of NE_TIMEOUT happened. 
Fixes https://github.com/owncloud/mirall/issues/1010

In case of NE_TIMEOUT the request is repeated for three times. In this
case, the hooks weren't correctly unhooked which caused a crash.
2013-09-18 12:58:17 +02:00

1934 lines
60 KiB
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/*
* libcsync -- a library to sync a directory with another
*
* Copyright (c) 2011 by Andreas Schneider <asn@cryptomilk.org>
* Copyright (c) 2012 by Klaas Freitag <freitag@owncloud.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "csync_owncloud.h"
#include <inttypes.h>
/*
* free the fetchCtx
*/
static void free_fetchCtx( struct listdir_context *ctx )
{
struct resource *newres, *res;
if( ! ctx ) return;
newres = ctx->list;
res = newres;
ctx->ref--;
if (ctx->ref > 0) return;
SAFE_FREE(ctx->target);
while( res ) {
SAFE_FREE(res->uri);
SAFE_FREE(res->name);
SAFE_FREE(res->md5);
newres = res->next;
SAFE_FREE(res);
res = newres;
}
SAFE_FREE(ctx);
}
/*
* local variables.
*/
struct dav_session_s dav_session; /* The DAV Session, initialised in dav_connect */
int _connected = 0; /* flag to indicate if a connection exists, ie.
the dav_session is valid */
csync_auth_callback _authcb;
long long chunked_total_size = 0;
long long chunked_done = 0;
struct listdir_context *propfind_cache = 0;
bool is_first_propfind = true;
csync_vio_file_stat_t _stat_cache;
/* id cache, cache the ETag: header of a GET request */
struct { char *uri; char *id; } _id_cache = { NULL, NULL };
static void clean_caches() {
clear_propfind_recursive_cache();
is_first_propfind = true;
free_fetchCtx(propfind_cache);
propfind_cache = NULL;
SAFE_FREE(_stat_cache.name);
SAFE_FREE(_stat_cache.md5 );
SAFE_FREE(_id_cache.uri);
SAFE_FREE(_id_cache.id);
}
#define PUT_BUFFER_SIZE 1024*5
char _buffer[PUT_BUFFER_SIZE];
/* Differance in usec between two time */
static int64_t _timediff(struct timeval x , struct timeval y)
{
return (y.tv_sec - x.tv_sec)*1000000 + (y.tv_usec - x.tv_usec);
}
/*
* helper method to build up a user text for SSL problems, called from the
* verify_sslcert callback.
*/
static void addSSLWarning( char *ptr, const char *warn, int len )
{
char *concatHere = ptr;
int remainingLen = 0;
if( ! (warn && ptr )) return;
remainingLen = len - strlen(ptr);
if( remainingLen <= 0 ) return;
concatHere = ptr + strlen(ptr); /* put the write pointer to the end. */
strncpy( concatHere, warn, remainingLen );
}
/*
* Callback to verify the SSL certificate, called from libneon.
* It analyzes the SSL problem, creates a user information text and passes
* it to the csync callback to ask the user.
*/
#define LEN 4096
static int verify_sslcert(void *userdata, int failures,
const ne_ssl_certificate *certificate)
{
char problem[LEN];
char buf[MAX(NE_SSL_DIGESTLEN, NE_ABUFSIZ)];
int ret = -1;
const ne_ssl_certificate *cert = certificate;
(void) userdata;
memset( problem, 0, LEN );
while( cert ) {
addSSLWarning( problem, "There are problems with the SSL certificate:\n", LEN );
if( failures & NE_SSL_NOTYETVALID ) {
addSSLWarning( problem, " * The certificate is not yet valid.\n", LEN );
}
if( failures & NE_SSL_EXPIRED ) {
addSSLWarning( problem, " * The certificate has expired.\n", LEN );
}
if( failures & NE_SSL_UNTRUSTED ) {
addSSLWarning( problem, " * The certificate is not trusted!\n", LEN );
}
if( failures & NE_SSL_IDMISMATCH ) {
addSSLWarning( problem, " * The hostname for which the certificate was "
"issued does not match the hostname of the server\n", LEN );
}
if( failures & NE_SSL_BADCHAIN ) {
addSSLWarning( problem, " * The certificate chain contained a certificate other than the server cert\n", LEN );
}
if( failures & NE_SSL_REVOKED ) {
addSSLWarning( problem, " * The server certificate has been revoked by the issuing authority.\n", LEN );
}
if (ne_ssl_cert_digest(cert, buf) == 0) {
addSSLWarning( problem, "Certificate fingerprint: ", LEN );
addSSLWarning( problem, buf, LEN );
addSSLWarning( problem, "\n", LEN );
}
cert = ne_ssl_cert_signedby( cert );
}
addSSLWarning( problem, "Do you want to accept the certificate chain anyway?\nAnswer yes to do so and take the risk: ", LEN );
if( _authcb ){
/* call the csync callback */
DEBUG_WEBDAV("Call the csync callback for SSL problems");
memset( buf, 0, NE_ABUFSIZ );
(*_authcb) ( problem, buf, NE_ABUFSIZ-1, 1, 0, NULL );
if( buf[0] == 'y' || buf[0] == 'Y') {
ret = 0;
} else {
DEBUG_WEBDAV("Authentication callback replied %s", buf );
}
}
DEBUG_WEBDAV("## VERIFY_SSL CERT: %d", ret );
return ret;
}
/*
* Authentication callback. Is set by ne_set_server_auth to be called
* from the neon lib to authenticate a request.
*/
static int ne_auth( void *userdata, const char *realm, int attempt,
char *username, char *password)
{
char buf[NE_ABUFSIZ];
(void) userdata;
(void) realm;
/* DEBUG_WEBDAV( "Authentication required %s", realm ); */
if( username && password ) {
DEBUG_WEBDAV( "Authentication required %s", username );
if( dav_session.user ) {
/* allow user without password */
if( strlen( dav_session.user ) < NE_ABUFSIZ ) {
strcpy( username, dav_session.user );
}
if( dav_session.pwd && strlen( dav_session.pwd ) < NE_ABUFSIZ ) {
strcpy( password, dav_session.pwd );
}
} else if( _authcb != NULL ){
/* call the csync callback */
DEBUG_WEBDAV("Call the csync callback for %s", realm );
memset( buf, 0, NE_ABUFSIZ );
(*_authcb) ("Enter your username: ", buf, NE_ABUFSIZ-1, 1, 0, NULL );
if( strlen(buf) < NE_ABUFSIZ ) {
strcpy( username, buf );
}
memset( buf, 0, NE_ABUFSIZ );
(*_authcb) ("Enter your password: ", buf, NE_ABUFSIZ-1, 0, 0, NULL );
if( strlen(buf) < NE_ABUFSIZ) {
strcpy( password, buf );
}
} else {
DEBUG_WEBDAV("I can not authenticate!");
}
}
return attempt;
}
/*
* Authentication callback. Is set by ne_set_proxy_auth to be called
* from the neon lib to authenticate against a proxy. The data to authenticate
* against comes from mirall throught vio_module_init function.
*/
static int ne_proxy_auth( void *userdata, const char *realm, int attempt,
char *username, char *password)
{
(void) userdata;
(void) realm;
if( dav_session.proxy_user && strlen( dav_session.proxy_user ) < NE_ABUFSIZ) {
strcpy( username, dav_session.proxy_user );
if( dav_session.proxy_pwd && strlen( dav_session.proxy_pwd ) < NE_ABUFSIZ) {
strcpy( password, dav_session.proxy_pwd );
}
}
/* NTLM needs several attempts */
return (attempt < 3) ? 0 : -1;
}
/* Configure the proxy depending on the variables */
static int configureProxy( ne_session *session )
{
int port = 8080;
int re = -1;
if( ! session ) return -1;
if( ! dav_session.proxy_type ) return 0; /* Go by NoProxy per default */
if( dav_session.proxy_port > 0 ) {
port = dav_session.proxy_port;
}
if( c_streq(dav_session.proxy_type, "NoProxy" )) {
DEBUG_WEBDAV("No proxy configured.");
re = 0;
} else if( c_streq(dav_session.proxy_type, "DefaultProxy") ||
c_streq(dav_session.proxy_type, "HttpProxy") ||
c_streq(dav_session.proxy_type, "HttpCachingProxy") ||
c_streq(dav_session.proxy_type, "Socks5Proxy")) {
if( dav_session.proxy_host ) {
DEBUG_WEBDAV("%s at %s:%d", dav_session.proxy_type, dav_session.proxy_host, port );
if (c_streq(dav_session.proxy_type, "Socks5Proxy")) {
ne_session_socks_proxy(session, NE_SOCK_SOCKSV5, dav_session.proxy_host, port,
dav_session.proxy_user, dav_session.proxy_pwd);
} else {
ne_session_proxy(session, dav_session.proxy_host, port );
}
re = 2;
} else {
DEBUG_WEBDAV("%s requested but no proxy host defined.", dav_session.proxy_type );
/* we used to try ne_system_session_proxy here, but we should rather err out
to behave exactly like the caller. */
}
} else {
DEBUG_WEBDAV( "Unsupported Proxy: %s", dav_session.proxy_type );
}
return re;
}
/*
* This hook is called for with the response of a request. Here its checked
* if a Set-Cookie header is there for the PHPSESSID. The key is stored into
* the webdav session to be added to subsequent requests.
*/
static void post_request_hook(ne_request *req, void *userdata, const ne_status *status)
{
const char *set_cookie_header = NULL;
const char *sc = NULL;
char *key = NULL;
(void) userdata;
if (dav_session.session_key)
return; /* We already have a session cookie, and we should ignore other ones */
if(!(status && req)) return;
if( status->klass == 2 || status->code == 401 ) {
/* successful request */
set_cookie_header = ne_get_response_header( req, "Set-Cookie" );
if( set_cookie_header ) {
DEBUG_WEBDAV(" Set-Cookie found: %s", set_cookie_header);
/* try to find a ', ' sequence which is the separator of neon if multiple Set-Cookie
* headers are there.
* The following code parses a string like this:
* Set-Cookie: 50ace6bd8a669=p537brtt048jh8srlp2tuep7em95nh9u98mj992fbqc47d1aecp1;
*/
sc = set_cookie_header;
while(sc) {
const char *sc_val = sc;
const char *sc_end = sc_val;
int cnt = 0;
int len = strlen(sc_val); /* The length of the rest of the header string. */
while( cnt < len && *sc_end != ';' && *sc_end != ',') {
cnt++;
sc_end++;
}
if( cnt == len ) {
/* exit: We are at the end. */
sc = NULL;
} else if( *sc_end == ';' ) {
/* We are at the end of the session key. */
int keylen = sc_end-sc_val;
if( key ) {
int oldlen = strlen(key);
key = c_realloc(key, oldlen + 2 + keylen+1);
strcpy(key + oldlen, "; ");
strncpy(key + oldlen + 2, sc_val, keylen);
key[oldlen + 2 + keylen] = '\0';
} else {
key = c_malloc(keylen+1);
strncpy( key, sc_val, keylen );
key[keylen] = '\0';
}
/* now search for a ',' to find a potential other header entry */
while(cnt < len && *sc_end != ',') {
cnt++;
sc_end++;
}
if( cnt < len )
sc = sc_end+2; /* mind the space after the comma */
else
sc = NULL;
} else if( *sc_end == ',' ) {
/* A new entry is to check. */
if( *(sc_end + 1) == ' ') {
sc = sc_end+2;
} else {
/* error condition */
sc = NULL;
}
}
}
}
} else {
DEBUG_WEBDAV("Request failed, don't take session header.");
}
if( key ) {
DEBUG_WEBDAV("----> Session-key: %s", key);
SAFE_FREE(dav_session.session_key);
dav_session.session_key = key;
}
}
/*
* this hook is called just after a request has been created, before its sent.
* Here it is used to set the proxy connection header if available.
*/
static void request_created_hook(ne_request *req, void *userdata,
const char *method, const char *requri)
{
(void) userdata;
(void) method;
(void) requri;
if( !req ) return;
if(dav_session.proxy_type) {
/* required for NTLM */
ne_add_request_header(req, "Proxy-Connection", "Keep-Alive");
}
}
/*
* this hook is called just before a request has been sent.
* Here it is used to set the session cookie if available.
*/
static void pre_send_hook(ne_request *req, void *userdata,
ne_buffer *header)
{
(void) userdata;
if( !req ) return;
if(dav_session.session_key) {
ne_buffer_concat(header, "Cookie: ", dav_session.session_key, "\r\n", NULL);
}
}
static int post_send_hook(ne_request *req, void *userdata,
const ne_status *status)
{
const char *location;
(void) userdata;
(void) status;
location = ne_get_response_header(req, "Location");
if( !location ) return NE_OK;
if( dav_session.redir_callback ) {
if( dav_session.redir_callback( dav_session.csync_ctx, location ) ) {
return NE_REDIRECT;
} else {
return NE_RETRY;
}
}
return NE_REDIRECT;
}
/* called from neon */
static void ne_notify_status_cb (void *userdata, ne_session_status status,
const ne_session_status_info *info)
{
struct transfer_context *tc = (struct transfer_context*) userdata;
struct timeval now;
int bandwidth_limit = 0;
if ((status == ne_status_sending || status == ne_status_recving)) {
if (info->sr.total > 0) {
oc_notify_progress( tc->url, CSYNC_NOTIFY_PROGRESS,
chunked_done + info->sr.progress,
chunked_total_size ? chunked_total_size : info->sr.total );
}
if (chunked_total_size && info->sr.total > 0 && info->sr.total == info->sr.progress) {
chunked_done += info->sr.total;
DEBUG_WEBDAV("Chunk upload completed for '%s' (%lld bytes out of %lld)", tc->url , chunked_done, chunked_total_size);
}
}
/* throttle connection */
if (status == ne_status_sending) bandwidth_limit = dav_session.bandwidth_limit_upload;
if (status == ne_status_recving) bandwidth_limit = dav_session.bandwidth_limit_download;
if (bandwidth_limit > 0 && gettimeofday(&now, NULL) == 0) {
int64_t diff = _timediff(tc->last_time, now);
int64_t len = info->sr.progress - tc->last_progress;
if (len > 0 && diff > 0 && (1000000 * len / diff) > (int64_t)bandwidth_limit) {
int64_t wait_time = (1000000 * len / bandwidth_limit) - diff;
if (wait_time > 0) {
usleep(wait_time);
}
}
tc->last_progress = info->sr.progress;
gettimeofday(&tc->last_time, NULL);
} else if (bandwidth_limit < 0 && bandwidth_limit > -100 && gettimeofday(&now, NULL) == 0) {
int64_t diff = _timediff(tc->last_time, now);
if (diff > 0) {
// -bandwidth_limit is the % of bandwidth
int64_t wait_time = -diff * (1 + 100.0 / bandwidth_limit);
if (wait_time > 0) {
usleep(wait_time);
}
}
gettimeofday(&tc->last_time, NULL);
}
}
// as per http://sourceforge.net/p/predef/wiki/OperatingSystems/
// extend as required
static const char* get_platform() {
#if defined (_WIN32)
return "Windows";
#elif defined(__APPLE__)
return "Macintosh";
#elif defined(__gnu_linux__)
return "Linux";
#elif defined(__DragonFly__)
/* might also define __FreeBSD__ */
return "DragonFlyBSD";
#elif defined(__FreeBSD__)
return "FreeBSD";
#elif defined(__NetBSD__)
return "NetBSD";
#elif defined(__OpenBSD__)
return "OpenBSD";
#elif defined(sun) || defined(__sun)
return "Solaris";
#else
return "Unknown OS";
#endif
}
/*
* Connect to a DAV server
* This function sets the flag _connected if the connection is established
* and returns if the flag is set, so calling it frequently is save.
*/
static int dav_connect(const char *base_url) {
int useSSL = 0;
int rc;
char protocol[6] = {'\0'};
char uaBuf[256];
char *path = NULL;
char *scheme = NULL;
char *host = NULL;
unsigned int port = 0;
int proxystate = -1;
if (_connected) {
return 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 );
goto out;
}
DEBUG_WEBDAV("* scheme %s", scheme );
DEBUG_WEBDAV("* host %s", host );
DEBUG_WEBDAV("* port %u", port );
DEBUG_WEBDAV("* path %s", path );
if( strcmp( scheme, "owncloud" ) == 0 ) {
strcpy( protocol, "http");
} else if( strcmp( scheme, "ownclouds" ) == 0 ) {
strcpy( protocol, "https");
useSSL = 1;
} else {
DEBUG_WEBDAV("Invalid scheme %s, go outa here!", scheme );
rc = -1;
goto out;
}
DEBUG_WEBDAV("* user %s", dav_session.user ? dav_session.user : "");
if (port == 0) {
port = ne_uri_defaultport(protocol);
}
rc = ne_sock_init();
DEBUG_WEBDAV("ne_sock_init: %d", rc );
if (rc < 0) {
rc = -1;
goto out;
}
dav_session.ctx = ne_session_create( protocol, host, port);
if (dav_session.ctx == NULL) {
DEBUG_WEBDAV("Session create with protocol %s failed", protocol );
rc = -1;
goto out;
}
if (dav_session.read_timeout == 0)
dav_session.read_timeout = 300; // set 300 seconds as default.
ne_set_read_timeout(dav_session.ctx, dav_session.read_timeout);
snprintf( uaBuf, sizeof(uaBuf), "Mozilla/5.0 (%s) csyncoC/%s",
get_platform(), CSYNC_STRINGIFY( LIBCSYNC_VERSION ));
ne_set_useragent( dav_session.ctx, uaBuf);
ne_set_server_auth(dav_session.ctx, ne_auth, 0 );
if( useSSL ) {
if (!ne_has_support(NE_FEATURE_SSL)) {
DEBUG_WEBDAV("Error: SSL is not enabled.");
rc = -1;
goto out;
}
ne_ssl_trust_default_ca( dav_session.ctx );
ne_ssl_set_verify( dav_session.ctx, verify_sslcert, 0 );
}
/* Hook called when a request is created. It sets the proxy connection header. */
ne_hook_create_request( dav_session.ctx, request_created_hook, NULL );
/* Hook called after response headers are read. It gets the Session ID. */
ne_hook_post_headers( dav_session.ctx, post_request_hook, NULL );
/* Hook called before a request is sent. It sets the cookies. */
ne_hook_pre_send( dav_session.ctx, pre_send_hook, NULL );
/* Hook called after request is dispatched. Used for handling possible redirections. */
ne_hook_post_send( dav_session.ctx, post_send_hook, NULL );
/* Proxy support */
proxystate = configureProxy( dav_session.ctx );
if( proxystate < 0 ) {
DEBUG_WEBDAV("Error: Proxy-Configuration failed.");
} else if( proxystate > 0 ) {
ne_set_proxy_auth( dav_session.ctx, ne_proxy_auth, 0 );
}
/* Disable, it is broken right now */
dav_session.no_recursive_propfind = true;
_connected = 1;
rc = 0;
out:
SAFE_FREE(path);
SAFE_FREE(host);
SAFE_FREE(scheme);
return rc;
}
/*
* result parsing list.
* This function is called to parse the result of the propfind request
* to list directories on the WebDAV server. I takes a single resource
* and fills a resource struct and stores it to the result list which
* is stored in the listdir_context.
*/
static void results(void *userdata,
const ne_uri *uri,
const ne_prop_result_set *set)
{
struct listdir_context *fetchCtx = userdata;
struct resource *newres = 0;
const char *clength, *modtime = NULL;
const char *resourcetype = NULL;
const char *md5sum = NULL;
const ne_status *status = NULL;
char *path = ne_path_unescape( uri->path );
(void) status;
if( ! fetchCtx ) {
DEBUG_WEBDAV("No valid fetchContext");
return;
}
if( ! fetchCtx->target ) {
DEBUG_WEBDAV("error: target must not be zero!" );
return;
}
/* Fill the resource structure with the data about the file */
newres = c_malloc(sizeof(struct resource));
newres->uri = path; /* no need to strdup because ne_path_unescape already allocates */
newres->name = c_basename( path );
modtime = ne_propset_value( set, &ls_props[0] );
clength = ne_propset_value( set, &ls_props[1] );
resourcetype = ne_propset_value( set, &ls_props[2] );
md5sum = ne_propset_value( set, &ls_props[3] );
newres->type = resr_normal;
if( clength == NULL && resourcetype && strncmp( resourcetype, "<DAV:collection>", 16 ) == 0) {
newres->type = resr_collection;
}
if (modtime) {
newres->modtime = oc_httpdate_parse(modtime);
}
/* DEBUG_WEBDAV("Parsing Modtime: %s -> %llu", modtime, (unsigned long long) newres->modtime ); */
if (clength) {
char *p;
newres->size = DAV_STRTOL(clength, &p, 10);
if (*p) {
newres->size = 0;
}
/* DEBUG_WEBDAV("Parsed File size for %s from %s: %lld", newres->name, clength, (long long)newres->size ); */
}
if( md5sum ) {
int len = strlen(md5sum)-2;
if( len > 0 ) {
/* Skip the " around the string coming back from the ne_propset_value call */
newres->md5 = c_malloc(len+1);
strncpy( newres->md5, md5sum+1, len );
newres->md5[len] = '\0';
}
}
/* prepend the new resource to the result list */
newres->next = fetchCtx->list;
fetchCtx->list = newres;
fetchCtx->result_count = fetchCtx->result_count + 1;
/* DEBUG_WEBDAV( "results for URI %s: %d %d", newres->name, (int)newres->size, (int)newres->type ); */
}
/*
* fetches a resource list from the WebDAV server. This is equivalent to list dir.
*/
static struct listdir_context *fetch_resource_list(const char *uri, int depth)
{
struct listdir_context *fetchCtx;
int ret = 0;
ne_propfind_handler *hdl = NULL;
ne_request *request = NULL;
const char *content_type = NULL;
char *curi = NULL;
const ne_status *req_status = NULL;
curi = _cleanPath( uri );
if (propfind_cache) {
if (c_streq(curi, propfind_cache->target)) {
propfind_cache->ref++;
SAFE_FREE(curi);
return propfind_cache;
}
}
if (propfind_recursive_cache && !dav_session.no_recursive_propfind) {
fetchCtx = get_listdir_context_from_cache(curi);
if (fetchCtx) {
return fetchCtx;
} else {
/* Not found in the recursive cache, fetch some */
return fetch_resource_list_recursive(uri, curi);
}
} else if (!is_first_propfind && !dav_session.no_recursive_propfind) {
/* 2nd propfind */
return fetch_resource_list_recursive(uri, curi);
}
is_first_propfind = false;
fetchCtx = c_malloc( sizeof( struct listdir_context ));
if (!fetchCtx) {
errno = ENOMEM;
SAFE_FREE(curi);
return NULL;
}
fetchCtx->list = NULL;
fetchCtx->target = curi;
fetchCtx->currResource = NULL;
fetchCtx->ref = 1;
/* do a propfind request and parse the results in the results function, set as callback */
hdl = ne_propfind_create(dav_session.ctx, curi, depth);
if(hdl) {
ret = ne_propfind_named(hdl, ls_props, results, fetchCtx);
request = ne_propfind_get_request( hdl );
req_status = ne_get_status( request );
}
if( ret == NE_OK ) {
fetchCtx->currResource = fetchCtx->list;
/* Check the request status. */
if( req_status && req_status->klass != 2 ) {
set_errno_from_http_errcode(req_status->code);
DEBUG_WEBDAV("ERROR: Request failed: status %d (%s)", req_status->code,
req_status->reason_phrase);
ret = NE_CONNECT;
set_error_message(req_status->reason_phrase);
oc_notify_progress( uri, CSYNC_NOTIFY_ERROR,
req_status->code,
(intptr_t)(req_status->reason_phrase) );
}
DEBUG_WEBDAV("Simple propfind result code %d.", req_status->code);
} else {
if( ret == NE_ERROR && req_status->code == 404) {
errno = ENOENT;
} else {
set_errno_from_neon_errcode(ret);
}
}
if( ret == NE_OK ) {
/* Check the content type. If the server has a problem, ie. database is gone or such,
* the content type is not xml but a html error message. Stop on processing if it's
* not XML.
* FIXME: Generate user error message from the reply content.
*/
content_type = ne_get_response_header( request, "Content-Type" );
if( !(content_type && c_streq(content_type, "application/xml; charset=utf-8") ) ) {
DEBUG_WEBDAV("ERROR: Content type of propfind request not XML: %s.",
content_type ? content_type: "<empty>");
errno = ERRNO_WRONG_CONTENT;
set_error_message("Server error: PROPFIND reply is not XML formatted!");
ret = NE_CONNECT;
}
}
if( ret != NE_OK ) {
const char *err = NULL;
err = ne_get_error( dav_session.ctx );
DEBUG_WEBDAV("WRN: propfind named failed with %d, request error: %s", ret, err ? err : "<nil>");
}
if( hdl )
ne_propfind_destroy(hdl);
if( ret != NE_OK ) {
free_fetchCtx(fetchCtx);
return NULL;
}
free_fetchCtx(propfind_cache);
propfind_cache = fetchCtx;
propfind_cache->ref++;
return fetchCtx;
}
static struct listdir_context *fetch_resource_list_attempts(const char *uri, int depth)
{
int i;
struct listdir_context *fetchCtx = NULL;
for(i = 0; i < 10; ++i) {
fetchCtx = fetch_resource_list(uri, depth);
if(fetchCtx) break;
/* only loop in case the content is not XML formatted. Otherwise for every
* non successful stat (for non existing directories) its tried 10 times. */
if( errno != ERRNO_WRONG_CONTENT ) break;
DEBUG_WEBDAV("=> Errno after fetch resource list for %s: %d", uri, errno);
DEBUG_WEBDAV(" New attempt %i", i);
}
return fetchCtx;
}
static void fill_stat_cache( csync_vio_file_stat_t *lfs ) {
if( _stat_cache.name ) SAFE_FREE(_stat_cache.name);
if( _stat_cache.md5 ) SAFE_FREE(_stat_cache.md5 );
if( !lfs) return;
_stat_cache.name = c_strdup(lfs->name);
_stat_cache.mtime = lfs->mtime;
_stat_cache.fields = lfs->fields;
_stat_cache.type = lfs->type;
_stat_cache.size = lfs->size;
if( lfs->md5 ) {
_stat_cache.md5 = c_strdup(lfs->md5);
}
}
/*
* file functions
*/
static int owncloud_stat(const char *uri, csync_vio_file_stat_t *buf) {
/* get props:
* modtime
* creattime
* size
*/
csync_vio_file_stat_t *lfs = NULL;
struct listdir_context *fetchCtx = NULL;
char *decodedUri = NULL;
int len = 0;
errno = 0;
DEBUG_WEBDAV("owncloud_stat %s called", uri );
buf->name = c_basename(uri);
if (buf->name == NULL) {
errno = ENOMEM;
return -1;
}
if( _stat_cache.name && strcmp( buf->name, _stat_cache.name ) == 0 ) {
buf->fields = CSYNC_VIO_FILE_STAT_FIELDS_NONE;
buf->fields |= CSYNC_VIO_FILE_STAT_FIELDS_TYPE;
buf->fields |= CSYNC_VIO_FILE_STAT_FIELDS_SIZE;
buf->fields |= CSYNC_VIO_FILE_STAT_FIELDS_MTIME;
buf->fields |= CSYNC_VIO_FILE_STAT_FIELDS_PERMISSIONS;
buf->fields = _stat_cache.fields;
buf->type = _stat_cache.type;
buf->mtime = _stat_cache.mtime;
buf->size = _stat_cache.size;
buf->mode = _stat_perms( _stat_cache.type );
buf->md5 = NULL;
if( _stat_cache.md5 ) {
buf->md5 = c_strdup( _stat_cache.md5 );
buf->fields |= CSYNC_VIO_FILE_STAT_FIELDS_MD5;
}
return 0;
}
/* fetch data via a propfind call. */
/* fetchCtx = fetch_resource_list( uri, NE_DEPTH_ONE); */
fetchCtx = fetch_resource_list_attempts( uri, NE_DEPTH_ONE);
DEBUG_WEBDAV("=> Errno after fetch resource list for %s: %d", uri, errno);
if (!fetchCtx) {
return -1;
}
if( fetchCtx ) {
struct resource *res = fetchCtx->list;
while( res ) {
/* remove trailing slashes */
len = strlen(res->uri);
while( len > 0 && res->uri[len-1] == '/' ) --len;
decodedUri = ne_path_unescape( fetchCtx->target ); /* allocates memory */
/* Only do the comparaison of the part of the string without the trailing
slashes, and make sure decodedUri is not too large */
if( strncmp(res->uri, decodedUri, len ) == 0 && decodedUri[len] == '\0') {
SAFE_FREE( decodedUri );
break;
}
res = res->next;
SAFE_FREE( decodedUri );
}
if( res ) {
DEBUG_WEBDAV("Working on file %s", res->name );
} else {
DEBUG_WEBDAV("ERROR: Result struct not valid!");
}
lfs = resourceToFileStat( res );
if( lfs ) {
buf->fields = CSYNC_VIO_FILE_STAT_FIELDS_NONE;
buf->fields |= CSYNC_VIO_FILE_STAT_FIELDS_TYPE;
buf->fields |= CSYNC_VIO_FILE_STAT_FIELDS_SIZE;
buf->fields |= CSYNC_VIO_FILE_STAT_FIELDS_MTIME;
buf->fields |= CSYNC_VIO_FILE_STAT_FIELDS_PERMISSIONS;
buf->fields |= CSYNC_VIO_FILE_STAT_FIELDS_MD5;
buf->fields = lfs->fields;
buf->type = lfs->type;
buf->mtime = lfs->mtime;
buf->size = lfs->size;
buf->mode = _stat_perms( lfs->type );
buf->md5 = NULL;
if( lfs->md5 ) {
buf->md5 = c_strdup( lfs->md5 );
}
/* fill the static stat buf as input for the stat function */
csync_vio_file_stat_destroy( lfs );
}
free_fetchCtx( fetchCtx );
}
DEBUG_WEBDAV("STAT result from propfind: %s, mtime: %llu", buf->name ? buf->name:"NULL",
(unsigned long long) buf->mtime );
return 0;
}
static ssize_t owncloud_write(csync_vio_method_handle_t *fhandle, const void *buf, size_t count) {
(void) fhandle;
(void) buf;
(void) count;
return 0;
}
static int content_reader(void *userdata, const char *buf, size_t len)
{
struct transfer_context *writeCtx = userdata;
size_t written = 0;
if( buf && writeCtx->fd ) {
/* DEBUG_WEBDAV("Writing %scompressed %d bytes", (writeCtx->decompress ? "" : "NON "), len); */
written = write(writeCtx->fd, buf, len);
if( len != written ) {
DEBUG_WEBDAV("WRN: content_reader wrote wrong num of bytes: %zu, %zu %d %d", len, written, errno, writeCtx->fd);
}
writeCtx->get_size += len;
return NE_OK;
} else {
errno = EBADF;
}
return NE_ERROR;
}
/*
* This hook is called after the response is here from the server, but before
* the response body is parsed. It decides if the response is compressed and
* if it is it installs the compression reader accordingly.
* If the response is not compressed, the normal response body reader is installed.
*/
static void install_content_reader( ne_request *req, void *userdata, const ne_status *status )
{
const char *enc = NULL;
struct transfer_context *writeCtx = userdata;
(void) status;
if( !writeCtx ) {
DEBUG_WEBDAV("Error: install_content_reader called without valid write context!");
return;
}
enc = ne_get_response_header( req, "Content-Encoding" );
DEBUG_WEBDAV("Content encoding ist <%s> with status %d", enc ? enc : "empty",
status ? status->code : -1 );
if( enc && c_streq( enc, "gzip" )) {
writeCtx->decompress = ne_decompress_reader( req, ne_accept_2xx,
content_reader, /* reader callback */
(void*) writeCtx ); /* userdata */
} else {
ne_add_response_body_reader( req, ne_accept_2xx,
content_reader,
(void*) writeCtx );
writeCtx->decompress = NULL;
}
enc = ne_get_response_header( req, "ETag" );
if (enc && *enc) {
SAFE_FREE(_id_cache.uri);
SAFE_FREE(_id_cache.id);
_id_cache.uri = c_strdup(writeCtx->url);
_id_cache.id = c_strdup(enc);
}
}
static char*_lastDir = NULL;
/* capabilities are currently:
* bool atomar_copy_support - oC provides atomar copy
* bool do_post_copy_stat - oC does not want the post copy check
* bool time_sync_required - oC does not require the time sync
* int unix_extensions - oC supports unix extensions.
* bool propagate_on_fd - oC supports the send_file method.
*/
static csync_vio_capabilities_t _owncloud_capabilities = { true, false, false, 0, true, false, false };
static csync_vio_capabilities_t *owncloud_capabilities(void)
{
#ifdef _WIN32
_owncloud_capabilities.unix_extensions = 0;
#endif
return &_owncloud_capabilities;
}
static const char* owncloud_file_id( const char *path )
{
ne_request *req = NULL;
const char *header = NULL;
char *uri = _cleanPath(path);
char *buf = NULL;
const char *cbuf = NULL;
csync_vio_file_stat_t *fs = NULL;
bool doHeadRequest = false;
if (_id_cache.uri && c_streq(path, _id_cache.uri)) {
header = _id_cache.id;
}
doHeadRequest= false; /* ownCloud server doesn't have good support for HEAD yet */
if( !header && doHeadRequest ) {
int neon_stat;
/* Perform an HEAD request to the resource. HEAD delivers the
* ETag header back. */
req = ne_request_create(dav_session.ctx, "HEAD", uri);
neon_stat = ne_request_dispatch(req);
set_errno_from_neon_errcode( neon_stat );
header = ne_get_response_header(req, "etag");
}
/* If the request went wrong or the server did not respond correctly
* (that can happen for collections) a stat call is done which translates
* into a PROPFIND request.
*/
if( ! header ) {
/* ... and do a stat call. */
fs = csync_vio_file_stat_new();
if(fs == NULL) {
DEBUG_WEBDAV( "owncloud_file_id: memory fault.");
errno = ENOMEM;
return NULL;
}
if( owncloud_stat( path, fs ) == 0 ) {
header = fs->md5;
}
}
/* In case the result is surrounded by "" cut them away. */
if( header ) {
if( header [0] == '"' && header[ strlen(header)-1] == '"') {
int len = strlen( header )-2;
buf = c_malloc( len+1 );
strncpy( buf, header+1, len );
buf[len] = '\0';
cbuf = buf;
/* do not free header here, as it belongs to the request */
} else {
cbuf = c_strdup(header);
}
}
DEBUG_WEBDAV("Get file ID for %s: %s", path, cbuf ? cbuf:"<null>");
if( fs ) csync_vio_file_stat_destroy(fs);
if( req ) ne_request_destroy(req);
SAFE_FREE(uri);
return cbuf;
}
static csync_vio_method_handle_t *owncloud_open(const char *durl,
int flags,
mode_t mode) {
char *uri = NULL;
char *dir = NULL;
int put = 0;
int rc = NE_OK;
struct transfer_context *writeCtx = NULL;
csync_vio_file_stat_t statBuf;
ZERO_STRUCT(statBuf);
(void) mode; /* unused on webdav server */
DEBUG_WEBDAV( "=> open called for %s", durl );
uri = _cleanPath( durl );
if( ! uri ) {
DEBUG_WEBDAV("Failed to clean path for %s", durl );
errno = EACCES;
rc = NE_ERROR;
}
if( rc == NE_OK )
dav_connect( durl );
if (flags & O_WRONLY) {
put = 1;
}
if (flags & O_RDWR) {
put = 1;
}
if (flags & O_CREAT) {
put = 1;
}
if( rc == NE_OK && put ) {
/* check if the dir name exists. Otherwise return ENOENT */
dir = c_dirname( durl );
if (dir == NULL) {
errno = ENOMEM;
SAFE_FREE(uri);
return NULL;
}
DEBUG_WEBDAV("Stating directory %s", dir );
if( c_streq( dir, _lastDir )) {
DEBUG_WEBDAV("Dir %s is there, we know it already.", dir);
} else {
if( owncloud_stat( dir, &statBuf ) == 0 ) {
SAFE_FREE(statBuf.name);
SAFE_FREE(statBuf.md5);
DEBUG_WEBDAV("Directory of file to open exists.");
SAFE_FREE( _lastDir );
_lastDir = c_strdup(dir);
} else {
DEBUG_WEBDAV("Directory %s of file to open does NOT exist.", dir );
/* the directory does not exist. That is an ENOENT */
errno = ENOENT;
SAFE_FREE(dir);
SAFE_FREE(uri);
SAFE_FREE(statBuf.name);
return NULL;
}
}
}
writeCtx = c_malloc( sizeof(struct transfer_context) );
writeCtx->url = c_strdup(durl);
writeCtx->req = NULL;
writeCtx->fd = -1;
if( rc == NE_OK && put) {
DEBUG_WEBDAV("PUT request on %s!", uri);
writeCtx->method = "PUT";
}
if( rc == NE_OK && ! put ) {
writeCtx->method = "GET";
DEBUG_WEBDAV("GET request on %s", uri );
}
if( rc != NE_OK ) {
SAFE_FREE( writeCtx );
}
SAFE_FREE( uri );
SAFE_FREE( dir );
return (csync_vio_method_handle_t *) writeCtx;
}
static csync_vio_method_handle_t *owncloud_creat(const char *durl, mode_t mode) {
csync_vio_method_handle_t *handle = owncloud_open(durl, O_CREAT|O_WRONLY|O_TRUNC, mode);
/* on create, the file needs to be created empty */
owncloud_write( handle, NULL, 0 );
return handle;
}
static int _user_want_abort()
{
return csync_abort_requested(dav_session.csync_ctx);
}
static void _log_callback(const char *func, const char *text)
{
csync_log(CSYNC_LOG_PRIORITY_TRACE, func, "%s", text);
}
static int owncloud_sendfile(csync_vio_method_handle_t *src, csync_vio_method_handle_t *hdl ) {
int rc = 0;
int neon_stat;
const ne_status *status;
struct transfer_context *write_ctx = (struct transfer_context*) hdl;
fhandle_t *fh = (fhandle_t *) src;
int fd;
int error_code = 0;
char *clean_uri = NULL;
int64_t file_size;
if( ! write_ctx ) {
errno = EINVAL;
return -1;
}
if( !fh ) {
errno = EINVAL;
return -1;
}
fd = fh->fd;
clean_uri = _cleanPath( write_ctx->url );
chunked_total_size = 0;
chunked_done = 0;
gettimeofday(&write_ctx->last_time, NULL);
DEBUG_WEBDAV("Sendfile handling request type %s. fd %d", write_ctx->method, fd);
/*
* Copy from the file descriptor if method == PUT
* Copy to the file descriptor if method == GET
*/
if( c_streq( write_ctx->method, "PUT") ) {
bool finished = true;
int attempts = 0;
/*
* do ten tries to upload the file chunked. Check the file size and mtime
* before submitting a chunk and after having submitted the last one.
* If the file has changed, retry.
*/
do {
Hbf_State state = HBF_SUCCESS;
hbf_transfer_t *trans = hbf_init_transfer(clean_uri);
hbf_set_log_callback(trans, _log_callback);
if (dav_session.hbf_block_size > 0) {
trans->threshold = trans->block_size = dav_session.hbf_block_size;
}
if (dav_session.hbf_threshold > 0) {
trans->threshold = dav_session.hbf_threshold;
}
finished = true;
if (!trans) {
DEBUG_WEBDAV("hbf_init_transfer failed");
rc = 1;
} else {
state = hbf_splitlist(trans, fd);
file_size = trans->stat_size;
(void) file_size;
DEBUG_WEBDAV("about to send %d block", trans->block_cnt);
/* Reuse chunk info that was stored in database if existing. */
if (dav_session.chunk_info && dav_session.chunk_info->transfer_id) {
DEBUG_WEBDAV("Existing chunk info %d %d ", dav_session.chunk_info->start_id, dav_session.chunk_info->transfer_id);
trans->start_id = dav_session.chunk_info->start_id;
trans->transfer_id = dav_session.chunk_info->transfer_id;
}
if (state == HBF_SUCCESS) {
ne_set_notifier(dav_session.ctx, ne_notify_status_cb, write_ctx);
oc_notify_progress(write_ctx->url, CSYNC_NOTIFY_START_UPLOAD, 0, 0);
}
/* Register the abort callback */
hbf_set_abort_callback( trans, _user_want_abort );
if( state == HBF_SUCCESS ) {
chunked_total_size = trans->stat_size;
/* Transfer all the chunks through the HTTP session using PUT. */
state = hbf_transfer( dav_session.ctx, trans, "PUT" );
}
/* Handle errors. */
if ( state != HBF_SUCCESS ) {
if( state == HBF_USER_ABORTED ) {
DEBUG_WEBDAV("User Aborted file upload!");
errno = ERRNO_USER_ABORT;
rc = -1;
}
/* If the source file changed during submission, lets try again */
if( state == HBF_SOURCE_FILE_CHANGE ) {
if( attempts++ < 30 ) { /* FIXME: How often do we want to try? */
finished = false; /* make it try again from scratch. */
DEBUG_WEBDAV("SOURCE file has changed during upload, retry #%d in two seconds!", attempts);
sleep(2);
}
}
if( finished ) {
SAFE_FREE(dav_session.error_string);
dav_session.error_string = c_strdup(hbf_error_string(trans, state));
error_code = hbf_fail_http_code(trans);
set_errno_from_http_errcode(error_code);
rc = 1;
if (dav_session.chunk_info) {
dav_session.chunk_info->start_id = trans->start_id;
dav_session.chunk_info->transfer_id = trans->transfer_id;
}
}
}
}
hbf_free_transfer(trans);
} while( !finished );
ne_set_notifier(dav_session.ctx, 0, 0);
if( rc == 0 ) {
DEBUG_WEBDAV(" * Upload finished %s", write_ctx->url);
} else {
oc_notify_progress(write_ctx->url, CSYNC_NOTIFY_ERROR, error_code, (intptr_t)(dav_session.error_string));
}
} else if( c_streq( write_ctx->method, "GET") ) {
/* GET a file to the file descriptor */
/* actually do the request */
int retry = 0;
DEBUG_WEBDAV(" -- GET on %s", write_ctx->url);
write_ctx->fd = fd;
ne_set_notifier(dav_session.ctx, ne_notify_status_cb, write_ctx);
oc_notify_progress(write_ctx->url, CSYNC_NOTIFY_START_DOWNLOAD, 0 , 0);
do {
csync_stat_t sb;
if (write_ctx->req)
ne_request_destroy( write_ctx->req );
if( _user_want_abort() ) {
errno = ERRNO_USER_ABORT;
break;
}
write_ctx->req = ne_request_create(dav_session.ctx, "GET", clean_uri);;
/* Allow compressed content by setting the header */
ne_add_request_header( write_ctx->req, "Accept-Encoding", "gzip" );
if (_tfstat(fd, &sb) >= 0 && sb.st_size > 0) {
char brange[64];
snprintf(brange, sizeof brange, "bytes=%"PRId64"-", (int64_t) sb.st_size);
ne_add_request_header(write_ctx->req, "Range", brange);
ne_add_request_header(write_ctx->req, "Accept-Ranges", "bytes");
DEBUG_WEBDAV("Retry with range %s fd %d", brange, fd);
}
/* hook called before the content is parsed to set the correct reader,
* either the compressed- or uncompressed reader.
*/
ne_hook_post_headers( dav_session.ctx, install_content_reader, write_ctx );
neon_stat = ne_request_dispatch(write_ctx->req );
/* delete the hook again, otherwise they get chained as they are with the session */
ne_unhook_post_headers( dav_session.ctx, install_content_reader, write_ctx );
/* if the compression handle is set through the post_header hook, delete it. */
if( write_ctx->decompress ) {
ne_decompress_destroy( write_ctx->decompress );
}
/* possible return codes are:
* NE_OK, NE_AUTH, NE_CONNECT, NE_TIMEOUT, NE_ERROR (from ne_request.h)
*/
status = ne_get_status( write_ctx->req );
if( neon_stat != NE_OK ) {
/* If a timeout happened try again for three times */
if (neon_stat == NE_TIMEOUT && (++retry) < 3) {
continue;
}
set_errno_from_neon_errcode(neon_stat);
DEBUG_WEBDAV("Error GET: Neon: %d, errno %d", neon_stat, errno);
error_code = errno;
if( status != NULL ) {
SAFE_FREE(dav_session.error_string);
dav_session.error_string = c_strdup(status->reason_phrase);
}
rc = 1;
} else {
if( status != NULL ) {
DEBUG_WEBDAV("GET http result %d (%s)", status->code, status->reason_phrase ? status->reason_phrase : "<empty");
if( status->klass != 2 ) {
DEBUG_WEBDAV("sendfile request failed with http status %d!", status->code);
set_errno_from_http_errcode( status->code );
/* decide if soft error or hard error that stops the whole sync. */
/* Currently all problems concerning one file are soft errors */
if( status->klass == 4 /* Forbidden and stuff, soft error */ ) {
rc = 1;
} else if( status->klass == 5 /* Server errors and such */ ) {
rc = 1; /* No Abort on individual file errors. */
} else {
rc = 1;
}
error_code = status->code;
SAFE_FREE(dav_session.error_string);
dav_session.error_string = c_strdup(status->reason_phrase);
} else {
DEBUG_WEBDAV("http request all cool, result code %d", status->code);
}
} else {
/* No status but still a problem */
DEBUG_WEBDAV("GET failed, but no neon status available.");
error_code = 400;
rc = 1;
}
}
break;
} while (1);
ne_set_notifier(dav_session.ctx, 0, 0);
if( rc == 0 ) {
DEBUG_WEBDAV(" ** Finished download %s", write_ctx->url);
} else {
oc_notify_progress( write_ctx->url, CSYNC_NOTIFY_ERROR, error_code , (intptr_t)(dav_session.error_string));
}
} else {
DEBUG_WEBDAV("Unknown method!");
errno = ERRNO_GENERAL_ERROR;
rc = -1;
}
chunked_total_size = 0;
chunked_done = 0;
SAFE_FREE(clean_uri);
return rc;
}
static int owncloud_close(csync_vio_method_handle_t *fhandle) {
struct transfer_context *writeCtx;
int ret = 0;
writeCtx = (struct transfer_context*) fhandle;
if (fhandle == NULL) {
DEBUG_WEBDAV("*** Close returns errno EBADF!");
errno = EBADF;
return -1;
}
if (writeCtx->req)
ne_request_destroy( writeCtx->req );
if( ret != -1 && strcmp( writeCtx->method, "PUT" ) == 0 ) {
// Clear the cache so get_id gets the updates
clean_caches();
}
/* free mem. Note that the request mem is freed by the ne_request_destroy call */
SAFE_FREE( writeCtx->url );
SAFE_FREE( writeCtx );
return ret;
}
static ssize_t owncloud_read(csync_vio_method_handle_t *fhandle, void *buf, size_t count) {
size_t len = 0;
(void) fhandle;
(void) buf;
(void) count;
return len;
}
static int64_t owncloud_lseek(csync_vio_method_handle_t *fhandle, int64_t offset, int whence) {
(void) fhandle;
(void) offset;
(void) whence;
return -1;
}
/*
* directory functions
*/
static csync_vio_method_handle_t *owncloud_opendir(const char *uri) {
struct listdir_context *fetchCtx = NULL;
DEBUG_WEBDAV("opendir method called on %s", uri );
dav_connect( uri );
/* fetchCtx = fetch_resource_list( uri, NE_DEPTH_ONE ); */
fetchCtx = fetch_resource_list_attempts( uri, NE_DEPTH_ONE);
if( !fetchCtx ) {
/* errno is set properly in fetch_resource_list */
DEBUG_WEBDAV("Errno set to %d", errno);
return NULL;
} else {
fetchCtx->currResource = fetchCtx->list;
DEBUG_WEBDAV("opendir returning handle %p", (void*) fetchCtx );
return fetchCtx;
}
/* no freeing of curi because its part of the fetchCtx and gets freed later */
}
static int owncloud_closedir(csync_vio_method_handle_t *dhandle) {
struct listdir_context *fetchCtx = dhandle;
DEBUG_WEBDAV("closedir method called %p!", dhandle);
free_fetchCtx(fetchCtx);
return 0;
}
static csync_vio_file_stat_t *owncloud_readdir(csync_vio_method_handle_t *dhandle) {
struct listdir_context *fetchCtx = dhandle;
if( fetchCtx == NULL) {
/* DEBUG_WEBDAV("An empty dir or at end"); */
return NULL;
}
while( fetchCtx->currResource ) {
resource* currResource = fetchCtx->currResource;
char *escaped_path = NULL;
/* set pointer to next element */
fetchCtx->currResource = fetchCtx->currResource->next;
/* It seems strange: first uri->path is unescaped to escape it in the next step again.
* The reason is that uri->path is not completely escaped (ie. it seems only to have
* spaces escaped), while the fetchCtx->target is fully escaped.
* See http://bugs.owncloud.org/thebuggenie/owncloud/issues/oc-613
*/
escaped_path = ne_path_escape( currResource->uri );
if (ne_path_compare(fetchCtx->target, escaped_path) != 0) {
csync_vio_file_stat_t* lfs = resourceToFileStat(currResource);
fill_stat_cache(lfs);
SAFE_FREE( escaped_path );
return lfs;
}
/* This is the target URI */
SAFE_FREE( escaped_path );
}
return NULL;
}
static int owncloud_mkdir(const char *uri, mode_t mode) {
int rc = NE_OK;
int len = 0;
char *path = _cleanPath( uri );
(void) mode; /* unused */
if( ! path ) {
errno = EINVAL;
rc = -1;
}
rc = dav_connect(uri);
if (rc < 0) {
errno = EINVAL;
}
/* the uri path is required to have a trailing slash */
if( rc >= 0 ) {
len = strlen( path );
if( path[len-1] != '/' ) {
path = c_realloc(path, len+2);
path[len]= '/';
path[len+1] = 0;
}
DEBUG_WEBDAV("MKdir on %s", path );
rc = ne_mkcol(dav_session.ctx, path );
set_errno_from_neon_errcode(rc);
/* Special for mkcol: it returns 405 if the directory already exists.
* To keep csync vio_mkdirs working errno EEXIST has to be returned. */
if (errno == EPERM && http_result_code_from_session() == 405) {
errno = EEXIST;
} else if (rc != NE_OK) {
oc_notify_progress(uri, CSYNC_NOTIFY_ERROR, http_result_code_from_session(),
(intptr_t)(dav_session.error_string) );
}
}
SAFE_FREE( path );
if( rc < 0 || rc != NE_OK ) {
return -1;
}
return 0;
}
static int owncloud_rmdir(const char *uri) {
int rc = NE_OK;
char* curi = _cleanPath( uri );
if( curi == NULL ) {
DEBUG_WEBDAV("Can not clean path for %s, bailing out.", uri ? uri:"<empty>");
return -1;
}
rc = dav_connect(uri);
if (rc < 0) {
errno = EINVAL;
}
if( rc >= 0 ) {
rc = ne_delete(dav_session.ctx, curi);
set_errno_from_neon_errcode( rc );
}
SAFE_FREE( curi );
if( rc < 0 || rc != NE_OK ) {
return -1;
}
return 0;
}
static int owncloud_rename(const char *olduri, const char *newuri) {
char *src = NULL;
char *target = NULL;
int rc = NE_OK;
rc = dav_connect(olduri);
if (rc < 0) {
errno = EINVAL;
}
src = _cleanPath( olduri );
target = _cleanPath( newuri );
if( rc >= 0 ) {
DEBUG_WEBDAV("MOVE: %s => %s: %d", src, target, rc );
rc = ne_move(dav_session.ctx, 1, src, target );
if (rc == NE_ERROR && http_result_code_from_session() == 409) {
/* destination folder might not exist */
errno = ENOENT;
} else {
set_errno_from_neon_errcode(rc);
if (rc != NE_OK) {
oc_notify_progress(olduri, CSYNC_NOTIFY_ERROR, http_result_code_from_session(),
(intptr_t)(dav_session.error_string) );
}
}
}
SAFE_FREE( src );
SAFE_FREE( target );
if( rc != NE_OK )
return 1;
return 0;
}
static int owncloud_unlink(const char *uri) {
int rc = NE_OK;
char *path = _cleanPath( uri );
if( ! path ) {
rc = NE_ERROR;
errno = EINVAL;
}
if( rc == NE_OK ) {
rc = dav_connect(uri);
if (rc < 0) {
errno = EINVAL;
}
}
if( rc == NE_OK ) {
rc = ne_delete( dav_session.ctx, path );
set_errno_from_neon_errcode(rc);
}
SAFE_FREE( path );
return 0;
}
static int owncloud_chmod(const char *uri, mode_t mode) {
(void) uri;
(void) mode;
return 0;
}
static int owncloud_chown(const char *uri, uid_t owner, gid_t group) {
(void) uri;
(void) owner;
(void) group;
return 0;
}
static char *owncloud_error_string()
{
return dav_session.error_string;
}
static int owncloud_commit() {
SAFE_FREE( _lastDir );
clean_caches();
if( dav_session.ctx )
ne_session_destroy( dav_session.ctx );
/* DEBUG_WEBDAV( "********** vio_module_shutdown" ); */
dav_session.ctx = 0;
ne_sock_exit();
_connected = 0; /* triggers dav_connect to go through the whole neon setup */
return 0;
}
static int owncloud_utimes(const char *uri, const struct timeval *times) {
ne_proppatch_operation ops[2];
ne_propname pname;
int rc = NE_OK;
char val[255];
char *curi = NULL;
const struct timeval *modtime = times+1;
long newmodtime;
curi = _cleanPath( uri );
if( ! uri ) {
errno = ENOENT;
return -1;
}
if( !times ) {
errno = EACCES;
return -1; /* FIXME: Find good errno */
}
pname.nspace = "DAV:";
pname.name = "lastmodified";
newmodtime = modtime->tv_sec;
snprintf( val, sizeof(val), "%ld", newmodtime );
DEBUG_WEBDAV("Setting LastModified of %s to %s", curi, val );
ops[0].name = &pname;
ops[0].type = ne_propset;
ops[0].value = val;
ops[1].name = NULL;
rc = ne_proppatch( dav_session.ctx, curi, ops );
SAFE_FREE(curi);
if( rc != NE_OK ) {
const char *err = ne_get_error(dav_session.ctx);
set_errno_from_neon_errcode(rc);
DEBUG_WEBDAV("Error in propatch: %s", err == NULL ? "<empty err msg.>" : err);
return -1;
}
clean_caches();
return 0;
}
static int owncloud_set_property(const char *key, void *data) {
#define READ_STRING_PROPERTY(P) \
if (c_streq(key, #P)) { \
SAFE_FREE(dav_session.P); \
dav_session.P = c_strdup((const char*)data); \
return 0; \
}
READ_STRING_PROPERTY(session_key)
READ_STRING_PROPERTY(proxy_type)
READ_STRING_PROPERTY(proxy_host)
READ_STRING_PROPERTY(proxy_user)
READ_STRING_PROPERTY(proxy_pwd)
#undef READ_STRING_PROPERTY
if (c_streq(key, "proxy_port")) {
dav_session.proxy_port = *(int*)(data);
return 0;
}
if (c_streq(key, "read_timeout") || c_streq(key, "timeout")) {
dav_session.read_timeout = *(int*)(data);
return 0;
}
if( c_streq(key, "csync_context")) {
dav_session.csync_ctx = data;
return 0;
}
if( c_streq(key, "hbf_info")) {
dav_session.chunk_info = (csync_hbf_info_t *)(data);
return 0;
}
if( c_streq(key, "get_dav_session")) {
/* Give the ne_session to the caller */
*(ne_session**)data = dav_session.ctx;
return 0;
}
if( c_streq(key, "no_recursive_propfind")) {
dav_session.no_recursive_propfind = *(bool*)(data);
return 0;
}
if( c_streq(key, "hbf_block_size")) {
dav_session.hbf_block_size = *(int64_t*)(data);
return 0;
}
if( c_streq(key, "hbf_threshold")) {
dav_session.hbf_threshold = *(int64_t*)(data);
return 0;
}
if( c_streq(key, "bandwidth_limit_upload")) {
dav_session.bandwidth_limit_upload = *(int*)(data);
return 0;
}
if( c_streq(key, "bandwidth_limit_download")) {
dav_session.bandwidth_limit_download = *(int*)(data);
return 0;
}
if( c_streq(key, "overall_progress_data")) {
dav_session.overall_progress_data = (csync_overall_progress_t*)(data);
}
if( c_streq(key, "redirect_callback")) {
if (data) {
csync_owncloud_redirect_callback_t* cb_wrapper = data;
dav_session.redir_callback = *cb_wrapper;
} else {
dav_session.redir_callback = NULL;
}
}
return -1;
}
csync_vio_method_t _method = {
.method_table_size = sizeof(csync_vio_method_t),
.get_capabilities = owncloud_capabilities,
.get_file_id = owncloud_file_id,
.open = owncloud_open,
.creat = owncloud_creat,
.close = owncloud_close,
.read = owncloud_read,
.write = owncloud_write,
.sendfile = owncloud_sendfile,
.lseek = owncloud_lseek,
.opendir = owncloud_opendir,
.closedir = owncloud_closedir,
.readdir = owncloud_readdir,
.mkdir = owncloud_mkdir,
.rmdir = owncloud_rmdir,
.stat = owncloud_stat,
.rename = owncloud_rename,
.unlink = owncloud_unlink,
.chmod = owncloud_chmod,
.chown = owncloud_chown,
.utimes = owncloud_utimes,
.set_property = owncloud_set_property,
.get_error_string = owncloud_error_string,
.commit = owncloud_commit
};
csync_vio_method_t *vio_module_init(const char *method_name, const char *args,
csync_auth_callback cb, void *userdata) {
(void) method_name;
(void) args;
(void) userdata;
_authcb = cb;
_connected = 0; /* triggers dav_connect to go through the whole neon setup */
memset(&dav_session, 0, sizeof(dav_session));
return &_method;
}
void vio_module_shutdown(csync_vio_method_t *method) {
(void) method;
owncloud_commit();
SAFE_FREE( dav_session.user );
SAFE_FREE( dav_session.pwd );
SAFE_FREE( dav_session.proxy_type );
SAFE_FREE( dav_session.proxy_host );
SAFE_FREE( dav_session.proxy_user );
SAFE_FREE( dav_session.proxy_pwd );
SAFE_FREE( dav_session.session_key);
SAFE_FREE( dav_session.error_string );
/* DEBUG_WEBDAV( "********** vio_module_shutdown" ); */
}
/* vim: set ts=4 sw=4 et cindent: */
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