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/*
WebDAV Class 1 namespace operations and 207 error handling
Copyright (C) 1999-2000, Joe Orton <joe@orton.demon.co.uk>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
MA 02111-1307, USA
Id: dav_basic.c,v 1.12 2000/05/09 18:28:00 joe Exp
*/
#include "config.h"
#include "http_request.h"
#include "dav_basic.h"
#include "uri.h" /* for uri_has_trailing_slash */
#include "http_basic.h" /* for http_content_type */
#include "string_utils.h" /* for sbuffer */
#include "dav_207.h"
/* Handling of 207 errors: we keep a string buffer, and append
* messages to it as they come down.
*
* Note, 424 means it would have worked but something else went wrong.
* We will have had the error for "something else", so we display
* that, and skip 424 errors. TODO: should display 'description' too,
* but find out whether servers actually use this first. */
/* This is passed as userdata to the 207 code. */
struct context {
char *href;
sbuffer buf;
unsigned int is_error;
};
static void *start_response( void *userdata, const char *href )
{
struct context *ctx = userdata;
HTTP_FREE( ctx->href );
ctx->href = xstrdup(href);
return NULL;
}
static void handle_error( struct context *ctx,
const char *status_line, const http_status *status )
{
if( status && status->class != 2 ) {
ctx->is_error = 1;
if( status->code != 424 ) {
sbuffer_concat( ctx->buf, ctx->href, ": ", status_line, "\n", NULL );
}
}
}
static void end_response( void *userdata, void *response, const char *status_line,
const http_status *status )
{
struct context *ctx = userdata;
handle_error( ctx, status_line, status );
}
static void
end_propstat( void *userdata, void *propstat, const char *status_line,
const http_status *status, const char *description )
{
struct context *ctx = userdata;
handle_error( ctx, status_line, status );
}
void dav_add_depth_header( http_req *req, int depth )
{
sbuffer hdrs = http_get_request_header( req );
switch( depth ) {
case DAV_DEPTH_ZERO:
sbuffer_zappend( hdrs, "Depth: 0" EOL );
break;
case DAV_DEPTH_ONE:
sbuffer_zappend( hdrs, "Depth: 1" EOL );
break;
default:
sbuffer_zappend( hdrs, "Depth: infinity" EOL );
break;
}
}
/* Dispatch a DAV request and handle a 207 error response appropriately */
int dav_simple_request( http_session *sess, http_req *req )
{
int ret, invalid;
http_status status;
http_content_type ctype = {0};
struct context ctx = {0};
dav_207_parser *p;
p = dav_207_init( &ctx );
ctx.buf = sbuffer_create();
dav_207_set_response_handlers( p, start_response, end_response );
dav_207_set_propstat_handlers( p, NULL, end_propstat );
http_add_response_body_reader( req, dav_accept_207, dav_207_parse, p );
http_add_response_header_handler( req, "Content-Type",
http_content_type_handler, &ctype );
ret = http_request_dispatch( req, &status );
invalid = dav_207_finish( p );
if( ret == HTTP_OK ) {
if( status.code == 207 ) {
if( invalid ) {
http_set_error( sess, dav_207_error(p) );
ret = HTTP_ERROR;
} else if( ctx.is_error ) {
http_set_error( sess, sbuffer_data(ctx.buf) );
ret = HTTP_ERROR;
}
} else if( status.class != 2 ) {
ret = HTTP_ERROR;
}
}
sbuffer_destroy(ctx.buf);
HTTP_FREE(ctx.href);
http_request_destroy( req );
return ret;
}
static int copy_or_move( http_session *sess, int is_move, int no_overwrite,
const char *src, const char *dest ) {
http_req *req = http_request_create( sess, is_move?"MOVE":"COPY", src );
const char *str;
sbuffer hdrs;
#ifdef USE_DAV_LOCKS
/* Copy needs to read/write the source, and write to the destination */
dav_lock_using_resource( req, src,
is_move?dav_lockusage_write:dav_lockusage_read,
DAV_DEPTH_INFINITE );
dav_lock_using_resource( req, dest, dav_lockusage_write,
DAV_DEPTH_INFINITE );
/* And we need to be able to add members to the destination's parent */
dav_lock_using_parent( req, dest );
#endif
hdrs = http_get_request_header( req );
str = http_get_server_hostport( sess );
sbuffer_concat( hdrs, "Destination: http://", str, dest, EOL, NULL );
if( no_overwrite )
sbuffer_zappend( hdrs, "Overwrite: F" EOL );
#if 0
/* FIXME */
if( ! http_webdav_server ) {
/* For non-WebDAV servers */
strcat( req.headers, "New-URI: " );
strcat( req.headers, to );
strcat( req.headers, EOL );
}
#endif
return dav_simple_request( sess, req );
}
int dav_copy( http_session *sess, const char *src, const char *dest ) {
return copy_or_move( sess, 0, 1, src, dest );
}
int dav_move( http_session *sess, const char *src, const char *dest ) {
return copy_or_move( sess, 1, 1, src, dest );
}
/* Deletes the specified resource. (and in only two lines of code!) */
int dav_delete( http_session *sess, const char *uri ) {
http_req *req = http_request_create( sess, "DELETE", uri );
#ifdef USE_DAV_LOCKS
dav_lock_using_resource( req, uri, dav_lockusage_write, DAV_DEPTH_INFINITE );
dav_lock_using_parent( req, uri );
#endif
/* joe: I asked on the DAV WG list about whether we might get a
* 207 error back from a DELETE... conclusion, you shouldn't if
* you don't send the Depth header, since we might be an HTTP/1.1
* client and a 2xx response indicates success to them. But
* it's all a bit unclear. In any case, DAV servers today do
* return 207 to DELETE even if we don't send the Depth header.
* So we handle 207 errors appropriately. */
return dav_simple_request( sess, req );
}
int dav_mkcol( http_session *sess, const char *uri )
{
http_req *req;
char *real_uri;
int ret;
if( uri_has_trailing_slash( uri ) ) {
real_uri = xstrdup( uri );
} else {
CONCAT2( real_uri, uri, "/" );
}
req = http_request_create( sess, "MKCOL", real_uri );
#ifdef USE_DAV_LOCKS
dav_lock_using_resource( req, real_uri, dav_lockusage_write, 0 );
dav_lock_using_parent( req, real_uri );
#endif
ret = dav_simple_request( sess, req );
free( real_uri );
return ret;
}
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