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/*
* Copyright (C) 2009 Sony Computer Entertainment Inc.
* Copyright 2009 Sony Corp.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#if defined(HAVE_CONFIG_H)
#include "config.h"
#endif
#define _GNU_SOURCE
#include <assert.h>
#include <stdbool.h>
#include <string.h>
#include "log/log.h"
#include "talloc/talloc.h"
#include "url.h"
/**
* pb_scheme_info - Helper for parsing URLs.
*/
struct pb_scheme_info {
enum pb_url_scheme scheme;
const char *str;
unsigned int str_len;
bool has_host;
};
static const struct pb_scheme_info schemes[] = {
{
.scheme = pb_url_file,
.str = "file",
.str_len = sizeof("file") - 1,
.has_host = false,
},
{
.scheme = pb_url_ftp,
.str = "ftp",
.str_len = sizeof("ftp") - 1,
.has_host = true,
},
{
.scheme = pb_url_http,
.str = "http",
.str_len = sizeof("http") - 1,
.has_host = true,
},
{
.scheme = pb_url_https,
.str = "https",
.str_len = sizeof("https") - 1,
.has_host = true,
},
{
.scheme = pb_url_nfs,
.str = "nfs",
.str_len = sizeof("nfs") - 1,
.has_host = true,
},
{
.scheme = pb_url_sftp,
.str = "sftp",
.str_len = sizeof("sftp") - 1,
.has_host = true,
},
{
.scheme = pb_url_tftp,
.str = "tftp",
.str_len = sizeof("tftp") - 1,
.has_host = true,
},
};
static const struct pb_scheme_info *file_scheme = &schemes[0];
/**
* pb_url_find_scheme - Find the pb_scheme_info for a URL string.
*/
static const struct pb_scheme_info *pb_url_scheme_info(
enum pb_url_scheme scheme)
{
unsigned int i;
for (i = 0; i < sizeof(schemes) / sizeof(schemes[0]); i++) {
const struct pb_scheme_info *info = &schemes[i];
if (info->scheme == scheme)
return info;
}
return NULL;
}
static const struct pb_scheme_info *pb_url_find_scheme(const char *url)
{
static const int sep_len = sizeof("://") - 1;
static const char *sep = "://";
unsigned int i, url_len;
url_len = strlen(url);
for (i = 0; i < sizeof(schemes) / sizeof(schemes[0]); i++) {
const struct pb_scheme_info *scheme = &schemes[i];
if (url_len < scheme->str_len + sep_len)
continue;
if (strncmp(url + scheme->str_len, sep, sep_len))
continue;
if (strncasecmp(url, scheme->str, scheme->str_len))
continue;
return scheme;
}
return NULL;
}
static void pb_url_parse_path(struct pb_url *url)
{
const char *p = strrchr(url->path, '/');
talloc_free(url->dir);
talloc_free(url->file);
if (p) {
p++;
url->dir = talloc_strndup(url, url->path, p - url->path);
url->file = talloc_strdup(url, p);
} else {
url->dir = NULL;
url->file = talloc_strdup(url, url->path);
}
}
/**
* pb_url_parse - Parse a remote file URL.
* @ctx: The talloc context to associate with the returned string.
*
* Returns a talloc'ed struct pb_url instance on success, or NULL on error.
*/
struct pb_url *pb_url_parse(void *ctx, const char *url_str)
{
const struct pb_scheme_info *si;
struct pb_url *url;
const char *p;
pb_log("%s: '%s'\n", __func__, url_str);
if (!url_str || !*url_str) {
assert(0 && "bad url");
return NULL;
}
url = talloc_zero(ctx, struct pb_url);
if (!url)
return NULL;
si = pb_url_find_scheme(url_str);
if (si) {
url->scheme = si->scheme;
p = url_str + si->str_len + strlen("://");
} else {
url->scheme = file_scheme->scheme;
p = url_str;
}
url->full = talloc_strdup(url, url_str);
if (url->scheme == pb_url_file) {
url->port = NULL;
url->host = NULL;
url->path = talloc_strdup(url, p);
} else {
int len;
const char *col;
const char *path;
path = strchr(p, '/');
if (!path) {
pb_log("%s: parse path failed '%s'\n", __func__ , p);
goto fail;
}
col = strchr(p, ':');
if (col) {
len = path - col - 1;
url->port = len ? talloc_strndup(url, col + 1, len)
: NULL;
len = col - p;
url->host = len ? talloc_strndup(url, p, len) : NULL;
} else {
url->port = NULL;
url->host = talloc_strndup(url, p, path - p);
}
/* remove multiple leading slashes */
for (; *path && *(path+1) == '/'; path++)
;
url->path = talloc_strdup(url, path);
}
pb_url_parse_path(url);
pb_log(" scheme %d\n", url->scheme);
pb_log(" host '%s'\n", url->host);
pb_log(" port '%s'\n", url->port);
pb_log(" path '%s'\n", url->path);
pb_log(" dir '%s'\n", url->dir);
pb_log(" file '%s'\n", url->file);
return url;
fail:
talloc_free(url);
return NULL;
}
static bool is_url(const char *str)
{
return strstr(str, "://") != NULL;
}
char *pb_url_to_string(struct pb_url *url)
{
const struct pb_scheme_info *scheme = pb_url_scheme_info(url->scheme);
assert(scheme);
return talloc_asprintf(url, "%s://%s%s", scheme->str,
scheme->has_host ? url->host : "", url->path);
}
static void pb_url_update_full(struct pb_url *url)
{
talloc_free(url->full);
url->full = pb_url_to_string(url);
}
static struct pb_url *pb_url_copy(void *ctx, const struct pb_url *url)
{
struct pb_url *new_url;
new_url = talloc(ctx, struct pb_url);
new_url->scheme = url->scheme;
new_url->full = talloc_strdup(url, url->full);
new_url->host = url->host ? talloc_strdup(url, url->host) : NULL;
new_url->port = url->port ? talloc_strdup(url, url->port) : NULL;
new_url->path = url->path ? talloc_strdup(url, url->path) : NULL;
new_url->dir = url->dir ? talloc_strdup(url, url->dir) : NULL;
new_url->file = url->file ? talloc_strdup(url, url->file) : NULL;
return new_url;
}
struct pb_url *pb_url_join(void *ctx, const struct pb_url *url, const char *s)
{
struct pb_url *new_url;
/* complete url: just parse all info from s */
if (is_url(s))
return pb_url_parse(ctx, s);
new_url = pb_url_copy(ctx, url);
if (s[0] == '/') {
/* absolute path: replace path of new_url */
talloc_free(new_url->path);
new_url->path = talloc_strdup(new_url, s);
} else {
/* relative path: join s to existing path. We know that
* url->dir ends with a slash. */
char *tmp = new_url->path;
new_url->path = talloc_asprintf(new_url, "%s%s", url->dir, s);
talloc_free(tmp);
}
/* replace ->dir and ->file with components from ->path */
pb_url_parse_path(new_url);
/* and re-generate the full URL */
pb_url_update_full(new_url);
return new_url;
}
const char *pb_url_scheme_name(enum pb_url_scheme scheme)
{
const struct pb_scheme_info *info = pb_url_scheme_info(scheme);
return info ? info->str : NULL;
}
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