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[openldap] / libraries / liblutil / fetch.c
1 /* fetch.c - routines for fetching data at URLs */
2 /* $OpenLDAP$ */
3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
4  *
5  * Copyright 1999-2005 The OpenLDAP Foundation.
6  * Portions Copyright 1999-2003 Kurt D. Zeilenga.
7  * All rights reserved.
8  *
9  * Redistribution and use in source and binary forms, with or without
10  * modification, are permitted only as authorized by the OpenLDAP
11  * Public License.
12  *
13  * A copy of this license is available in the file LICENSE in the
14  * top-level directory of the distribution or, alternatively, at
15  * <http://www.OpenLDAP.org/license.html>.
16  */
17 /* This work was initially developed by Kurt D. Zeilenga for
18  * inclusion in OpenLDAP Software.
19  */
20
21 #include "portable.h"
22
23 #include <stdio.h>
24
25 #include <ac/stdlib.h>
26
27 #include <ac/string.h>
28 #include <ac/socket.h>
29 #include <ac/time.h>
30
31 #ifdef HAVE_FETCH
32 #include <fetch.h>
33 #endif
34
35 #include "ldap_log.h"
36 #include "lber_pvt.h"
37 #include "ldap_pvt.h"
38 #include "ldap_config.h"
39 #include "ldif.h"
40
41 FILE *
42 ldif_open_url(
43         LDAP_CONST char *urlstr
44 )
45 {
46         FILE *url;
47         char *p = NULL;
48 #ifdef HAVE_FETCH
49         url = fetchGetURL( (char*) urlstr, "" );
50
51 #else
52         if( strncasecmp( "file://", urlstr, sizeof("file://")-1 ) == 0 ) {
53                 p = strchr( &urlstr[sizeof("file://")-1], '/' );
54                 if( p == NULL ) {
55                         return NULL;
56                 }
57
58                 /* we don't check for LDAP_DIRSEP since URLs should contain '/' */
59                 /* skip over false root */
60                 p++;
61
62                 p = ber_strdup( p );
63                 ldap_pvt_hex_unescape( p );
64
65                 url = fopen( p, "rb" );
66
67                 ber_memfree( p );
68         } else {
69                 return NULL;
70         }
71 #endif
72         return url;
73 }
74
75 int
76 ldif_fetch_url(
77     LDAP_CONST char     *urlstr,
78     char        **valuep,
79     ber_len_t *vlenp
80 )
81 {
82         FILE *url;
83         char buffer[1024];
84         char *p = NULL;
85         size_t total;
86         size_t bytes;
87
88         *valuep = NULL;
89         *vlenp = 0;
90
91         url = ldif_open_url( urlstr );
92
93         if( url == NULL ) {
94                 return -1;
95         }
96
97         total = 0;
98
99         while( (bytes = fread( buffer, 1, sizeof(buffer), url )) != 0 ) {
100                 char *newp = ber_memrealloc( p, total + bytes + 1 );
101                 if( newp == NULL ) {
102                         ber_memfree( p );
103                         fclose( url );
104                         return -1;
105                 }
106                 p = newp;
107                 AC_MEMCPY( &p[total], buffer, bytes );
108                 total += bytes;
109         }
110
111         fclose( url );
112
113         if( total == 0 ) {
114                 char *newp = ber_memrealloc( p, 1 );
115                 if( newp == NULL ) {
116                         ber_memfree( p );
117                         return -1;
118                 }
119                 p = newp;
120         }
121
122         p[total] = '\0';
123         *valuep = p;
124         *vlenp = total;
125
126         return 0;
127 }