diff options
Diffstat (limited to 'lib/url')
| -rw-r--r-- | lib/url/url.c | 215 | ||||
| -rw-r--r-- | lib/url/url.h | 65 |
2 files changed, 280 insertions, 0 deletions
diff --git a/lib/url/url.c b/lib/url/url.c new file mode 100644 index 0000000..4e4b961 --- /dev/null +++ b/lib/url/url.c @@ -0,0 +1,215 @@ +/* + * 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 <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; +}; + +static const struct pb_scheme_info schemes[] = { + { + .scheme = pb_url_file, + .str = "file", + .str_len = sizeof("file") - 1, + }, + { + .scheme = pb_url_ftp, + .str = "ftp", + .str_len = sizeof("ftp") - 1, + }, + { + .scheme = pb_url_http, + .str = "http", + .str_len = sizeof("http") - 1, + }, + { + .scheme = pb_url_https, + .str = "https", + .str_len = sizeof("https") - 1, + }, + { + .scheme = pb_url_nfs, + .str = "nfs", + .str_len = sizeof("nfs") - 1, + }, + { + .scheme = pb_url_sftp, + .str = "sftp", + .str_len = sizeof("sftp") - 1, + }, + { + .scheme = pb_url_tftp, + .str = "tftp", + .str_len = sizeof("tftp") - 1, + }, +}; + +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_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; + } + + /* Assume this is a non-url local file. */ + + return file_scheme; +} + +/** + * 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); + + url->scheme = si->scheme; + p = url_str + si->str_len + strlen("://"); + + 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); + } + + p = strrchr(url->path, '/'); + + 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_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; +} + +const char *pb_url_scheme_name(enum pb_url_scheme scheme) +{ + unsigned int i; + + for (i = 0; i < sizeof(schemes) / sizeof(schemes[0]); i++) + if (schemes[i].scheme == scheme) + return schemes[i].str; + + return NULL; +} diff --git a/lib/url/url.h b/lib/url/url.h new file mode 100644 index 0000000..3cb7cd8 --- /dev/null +++ b/lib/url/url.h @@ -0,0 +1,65 @@ +/* + * 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(_PB_URL_PARSER_H) +#define _PB_URL_PARSER_H + +/** + * enum pb_url_scheme - Enumeration of the URL schemes we can handle. + */ + +enum pb_url_scheme { + pb_url_unknown = 0, + pb_url_file, + pb_url_ftp, + pb_url_http, + pb_url_https, + pb_url_nfs, + pb_url_sftp, + pb_url_tftp, +}; + +/** + * struct pb_url - Parsed URL info. + * @scheme: The enum pb_url_scheme for this URL. + * @full: The full URL = scheme://host:port/path. + * @host: The host part of URL. + * @port: The port part of URL. + * @path: The path part of URL. + * @dir: The dir part of path. + * @file: The file part of path. + * + * For info on URL syntax see: + * http://www.ietf.org/rfc/rfc3986.txt + */ + +struct pb_url { + enum pb_url_scheme scheme; + char *full; + char *host; + char *port; + char *path; + char *dir; + char *file; +}; + +struct pb_url *pb_url_parse(void *ctx, const char *url_str); + +const char *pb_url_scheme_name(enum pb_url_scheme scheme); + +#endif |
