asterisk/main/uri.c

324 lines
8.1 KiB
C

/*
* Asterisk -- An open source telephony toolkit.
*
* Copyright (C) 2014, Digium, Inc.
*
* Kevin Harwell <kharwell@digium.com>
*
* See http://www.asterisk.org for more information about
* the Asterisk project. Please do not directly contact
* any of the maintainers of this project for assistance;
* the project provides a web site, mailing lists and IRC
* channels for your use.
*
* This program is free software, distributed under the terms of
* the GNU General Public License Version 2. See the LICENSE file
* at the top of the source tree.
*/
#include "asterisk.h"
#include "asterisk/astobj2.h"
#include "asterisk/strings.h"
#include "asterisk/uri.h"
#ifdef HAVE_URIPARSER
#include <uriparser/Uri.h>
#endif
/*! \brief Stores parsed uri information */
struct ast_uri {
/*! scheme (e.g. http, https, ws, wss, etc...) */
char *scheme;
/*! username:password */
char *user_info;
/*! host name or address */
char *host;
/*! associated port */
char *port;
/*! path info following host[:port] */
char *path;
/*! query information */
char *query;
/*! storage for uri string */
char uri[0];
};
/*!
* \brief Construct a uri object with the given values.
*
* \note The size parameters [should] include room for the string terminator
* (strlen(<param>) + 1). For instance, if a scheme of 'http' is given
* then the 'scheme_size' should be equal to 5.
*/
static struct ast_uri *ast_uri_create_(
const char *scheme, unsigned int scheme_size,
const char *user_info, unsigned int user_info_size,
const char *host, unsigned int host_size,
const char *port, unsigned int port_size,
const char *path, unsigned int path_size,
const char *query, unsigned int query_size)
{
#define SET_VALUE(param, field, size) \
do { if (param) { \
ast_copy_string(p, param, size); \
field = p; \
p += size; } } while (0)
char *p;
struct ast_uri *res = ao2_alloc(
sizeof(*res) + scheme_size + user_info_size + host_size +
port_size + path_size + query_size, NULL);
if (!res) {
ast_log(LOG_ERROR, "Unable to create URI object\n");
return NULL;
}
p = res->uri;
SET_VALUE(scheme, res->scheme, scheme_size);
SET_VALUE(user_info, res->user_info, user_info_size);
SET_VALUE(host, res->host, host_size);
SET_VALUE(port, res->port, port_size);
SET_VALUE(path, res->path, path_size);
SET_VALUE(query, res->query, query_size);
return res;
}
struct ast_uri *ast_uri_create(const char *scheme, const char *user_info,
const char *host, const char *port,
const char *path, const char *query)
{
return ast_uri_create_(
scheme, scheme ? strlen(scheme) + 1 : 0,
user_info, user_info ? strlen(user_info) + 1 : 0,
host, host ? strlen(host) + 1 : 0,
port, port ? strlen(port) + 1 : 0,
path, path ? strlen(path) + 1 : 0,
query, query ? strlen(query) + 1 : 0);
}
struct ast_uri *ast_uri_copy_replace(const struct ast_uri *uri, const char *scheme,
const char *user_info, const char *host,
const char *port, const char *path,
const char *query)
{
return ast_uri_create(
scheme ? scheme : uri->scheme,
user_info ? user_info : uri->user_info,
host ? host : uri->host,
port ? port : uri->port,
path ? path : uri->path,
query ? query : uri->query);
}
const char *ast_uri_scheme(const struct ast_uri *uri)
{
return uri->scheme;
}
const char *ast_uri_user_info(const struct ast_uri *uri)
{
return uri->user_info;
}
const char *ast_uri_host(const struct ast_uri *uri)
{
return uri->host;
}
const char *ast_uri_port(const struct ast_uri *uri)
{
return uri->port;
}
const char *ast_uri_path(const struct ast_uri *uri)
{
return uri->path;
}
const char *ast_uri_query(const struct ast_uri *uri)
{
return uri->query;
}
int ast_uri_is_secure(const struct ast_uri *uri)
{
return ast_strlen_zero(uri->scheme) ? 0 :
*(uri->scheme + strlen(uri->scheme) - 1) == 's';
}
#ifdef HAVE_URIPARSER
struct ast_uri *ast_uri_parse(const char *uri)
{
UriParserStateA state;
UriUriA uria;
struct ast_uri *res;
unsigned int scheme_size, user_info_size, host_size;
unsigned int port_size, path_size, query_size;
const char *path_start, *path_end;
state.uri = &uria;
if (uriParseUriA(&state, uri) != URI_SUCCESS) {
ast_log(LOG_ERROR, "Unable to parse URI %s\n", uri);
uriFreeUriMembersA(&uria);
return NULL;
}
scheme_size = uria.scheme.first ?
uria.scheme.afterLast - uria.scheme.first + 1 : 0;
user_info_size = uria.userInfo.first ?
uria.userInfo.afterLast - uria.userInfo.first + 1 : 0;
host_size = uria.hostText.first ?
uria.hostText.afterLast - uria.hostText.first + 1 : 0;
port_size = uria.portText.first ?
uria.portText.afterLast - uria.portText.first + 1 : 0;
path_start = uria.pathHead && uria.pathHead->text.first ?
uria.pathHead->text.first : NULL;
path_end = path_start ? uria.pathTail->text.afterLast : NULL;
path_size = path_end ? path_end - path_start + 1 : 0;
query_size = uria.query.first ?
uria.query.afterLast - uria.query.first + 1 : 0;
res = ast_uri_create_(uria.scheme.first, scheme_size,
uria.userInfo.first, user_info_size,
uria.hostText.first, host_size,
uria.portText.first, port_size,
path_start, path_size,
uria.query.first, query_size);
uriFreeUriMembersA(&uria);
return res;
}
#else
struct ast_uri *ast_uri_parse(const char *uri)
{
#define SET_VALUES(value) \
value = uri; \
size_##value = p - uri + 1; \
uri = p + 1;
const char *p, *scheme = NULL, *user_info = NULL, *host = NULL;
const char *port = NULL, *path = NULL, *query = NULL;
unsigned int size_scheme = 0, size_user_info = 0, size_host = 0;
unsigned int size_port = 0, size_path = 0, size_query = 0;
if ((p = strstr(uri, "://"))) {
scheme = uri;
size_scheme = p - uri + 1;
uri = p + 3;
}
if ((p = strchr(uri, '@'))) {
SET_VALUES(user_info);
}
if ((p = strchr(uri, ':'))) {
SET_VALUES(host);
}
if ((p = strchr(uri, '/'))) {
if (!host) {
SET_VALUES(host);
} else {
SET_VALUES(port);
}
}
if ((p = strchr(uri, '?'))) {
query = p + 1;
size_query = strlen(query) + 1;
} else {
p = uri + strlen(uri);
}
if (!host) {
SET_VALUES(host);
} else if (*(uri - 1) == ':') {
SET_VALUES(port);
} else if (*(uri - 1) == '/') {
SET_VALUES(path);
}
return ast_uri_create_(scheme, size_scheme,
user_info, size_user_info,
host, size_host,
port, size_port,
path, size_path,
query, size_query);
}
#endif
static struct ast_uri *uri_parse_and_default(const char *uri, const char *scheme,
const char *port, const char *secure_port)
{
struct ast_uri *res;
int len = strlen(scheme);
if (!strncmp(uri, scheme, len)) {
res = ast_uri_parse(uri);
} else {
/* make room for <scheme>:// */
char *with_scheme = ast_malloc(len + strlen(uri) + 4);
if (!with_scheme) {
ast_log(LOG_ERROR, "Unable to allocate uri '%s' with "
"scheme '%s'", uri, scheme);
return NULL;
}
/* safe - 'with_scheme' created with size equal to len of
scheme plus length of uri plus space for extra characters
'://' and terminator */
sprintf(with_scheme, "%s://%s", scheme, uri);
res = ast_uri_parse(with_scheme);
ast_free(with_scheme);
}
if (res && ast_strlen_zero(ast_uri_port(res))) {
/* default the port if not given */
struct ast_uri *tmp = ast_uri_copy_replace(
res, NULL, NULL, NULL,
ast_uri_is_secure(res) ? secure_port : port,
NULL, NULL);
ao2_ref(res, -1);
res = tmp;
}
return res;
}
struct ast_uri *ast_uri_parse_http(const char *uri)
{
return uri_parse_and_default(uri, "http", "80", "443");
}
struct ast_uri *ast_uri_parse_websocket(const char *uri)
{
return uri_parse_and_default(uri, "ws", "80", "443");
}
char *ast_uri_make_host_with_port(const struct ast_uri *uri)
{
int host_size = ast_uri_host(uri) ?
strlen(ast_uri_host(uri)) : 0;
/* if there is a port +1 for the colon */
int port_size = ast_uri_port(uri) ?
strlen(ast_uri_port(uri)) + 1 : 0;
char *res = ast_malloc(host_size + port_size + 1);
if (!res) {
return NULL;
}
memcpy(res, ast_uri_host(uri), host_size);
if (ast_uri_port(uri)) {
res[host_size] = ':';
memcpy(res + host_size + 1,
ast_uri_port(uri), port_size - 1);
}
res[host_size + port_size] = '\0';
return res;
}