Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
Add Lua interface to HTTPFetchRequest
This allows mods to perform both asynchronous and synchronous HTTP requests. Mods are only granted access to HTTP APIs if either mod security is disabled or if they are whitelisted in any of the the secure.http_mods and secure.trusted_mods settings. Adds httpfetch_caller_alloc_secure to generate random, non-predictable caller IDs so that lua mods cannot spy on each others HTTP queries.
- Loading branch information
Showing
12 changed files
with
357 additions
and
1 deletion.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,176 @@ | ||
/* | ||
Minetest | ||
Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com> | ||
This program is free software; you can redistribute it and/or modify | ||
it under the terms of the GNU Lesser General Public License as published by | ||
the Free Software Foundation; either version 2.1 of the License, or | ||
(at your option) any later version. | ||
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 Lesser General Public License for more details. | ||
You should have received a copy of the GNU Lesser General Public License along | ||
with this program; if not, write to the Free Software Foundation, Inc., | ||
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | ||
*/ | ||
|
||
#include "lua_api/l_internal.h" | ||
#include "common/c_converter.h" | ||
#include "common/c_content.h" | ||
#include "lua_api/l_http.h" | ||
#include "httpfetch.h" | ||
#include "settings.h" | ||
#include "log.h" | ||
|
||
#include <algorithm> | ||
#include <iomanip> | ||
#include <cctype> | ||
|
||
#define HTTP_API(name) \ | ||
lua_pushstring(L, #name); \ | ||
lua_pushcfunction(L, l_http_##name); \ | ||
lua_settable(L, -3); | ||
|
||
#if USE_CURL | ||
void ModApiHttp::read_http_fetch_request(lua_State *L, HTTPFetchRequest &req) | ||
{ | ||
luaL_checktype(L, 1, LUA_TTABLE); | ||
|
||
req.caller = httpfetch_caller_alloc_secure(); | ||
getstringfield(L, 1, "url", req.url); | ||
lua_getfield(L, 1, "user_agent"); | ||
if (lua_isstring(L, -1)) | ||
req.useragent = getstringfield_default(L, 1, "user_agent", ""); | ||
lua_pop(L, 1); | ||
req.multipart = getboolfield_default(L, 1, "multipart", false); | ||
req.timeout = getintfield_default(L, 1, "timeout", 3) * 1000; | ||
|
||
// post_data: if table, post form data, otherwise raw data | ||
lua_getfield(L, 1, "post_data"); | ||
if (lua_istable(L, 2)) { | ||
lua_pushnil(L); | ||
while (lua_next(L, 2) != 0) | ||
{ | ||
req.post_fields[luaL_checkstring(L, -2)] = luaL_checkstring(L, -1); | ||
lua_pop(L, 1); | ||
} | ||
} else if (lua_isstring(L, 2)) { | ||
req.post_data = lua_tostring(L, 2); | ||
} | ||
lua_pop(L, 1); | ||
|
||
lua_getfield(L, 1, "extra_headers"); | ||
if (lua_istable(L, 2)) { | ||
lua_pushnil(L); | ||
while (lua_next(L, 2) != 0) | ||
{ | ||
const char *header = luaL_checkstring(L, -1); | ||
req.extra_headers.push_back(header); | ||
lua_pop(L, 1); | ||
} | ||
} | ||
lua_pop(L, 1); | ||
} | ||
|
||
void ModApiHttp::push_http_fetch_result(lua_State *L, HTTPFetchResult &res, bool completed) | ||
{ | ||
lua_newtable(L); | ||
setboolfield(L, -1, "succeeded", res.succeeded); | ||
setboolfield(L, -1, "timeout", res.timeout); | ||
setboolfield(L, -1, "completed", completed); | ||
setintfield(L, -1, "code", res.response_code); | ||
setstringfield(L, -1, "data", res.data.c_str()); | ||
} | ||
|
||
// http_api.fetch_async(HTTPRequest definition) | ||
int ModApiHttp::l_http_fetch_async(lua_State *L) | ||
{ | ||
NO_MAP_LOCK_REQUIRED; | ||
|
||
HTTPFetchRequest req; | ||
read_http_fetch_request(L, req); | ||
|
||
actionstream << "Mod performs HTTP request with URL " << req.url << std::endl; | ||
httpfetch_async(req); | ||
|
||
// Convert handle to hex string since lua can't handle 64-bit integers | ||
std::stringstream handle_conversion_stream; | ||
handle_conversion_stream << std::hex << req.caller; | ||
std::string caller_handle(handle_conversion_stream.str()); | ||
|
||
lua_pushstring(L, caller_handle.c_str()); | ||
return 1; | ||
} | ||
|
||
// http_api.fetch_async_get(handle) | ||
int ModApiHttp::l_http_fetch_async_get(lua_State *L) | ||
{ | ||
NO_MAP_LOCK_REQUIRED; | ||
|
||
std::string handle_str = luaL_checkstring(L, 1); | ||
|
||
// Convert hex string back to 64-bit handle | ||
u64 handle; | ||
std::stringstream handle_conversion_stream; | ||
handle_conversion_stream << std::hex << handle_str; | ||
handle_conversion_stream >> handle; | ||
|
||
HTTPFetchResult res; | ||
bool completed = httpfetch_async_get(handle, res); | ||
|
||
push_http_fetch_result(L, res, completed); | ||
|
||
return 1; | ||
} | ||
|
||
int ModApiHttp::l_request_http_api(lua_State *L) | ||
{ | ||
NO_MAP_LOCK_REQUIRED; | ||
|
||
// Mod must be listed in secure.http_mods or secure.trusted_mods | ||
lua_rawgeti(L, LUA_REGISTRYINDEX, CUSTOM_RIDX_CURRENT_MOD_NAME); | ||
if (!lua_isstring(L, -1)) { | ||
lua_pushnil(L); | ||
return 1; | ||
} | ||
|
||
const char *mod_name = lua_tostring(L, -1); | ||
std::string http_mods = g_settings->get("secure.http_mods"); | ||
http_mods.erase(std::remove(http_mods.begin(), http_mods.end(), ' '), http_mods.end()); | ||
std::vector<std::string> mod_list_http = str_split(http_mods, ','); | ||
|
||
std::string trusted_mods = g_settings->get("secure.trusted_mods"); | ||
trusted_mods.erase(std::remove(trusted_mods.begin(), trusted_mods.end(), ' '), trusted_mods.end()); | ||
std::vector<std::string> mod_list_trusted = str_split(trusted_mods, ','); | ||
|
||
mod_list_http.insert(mod_list_http.end(), mod_list_trusted.begin(), mod_list_trusted.end()); | ||
if (std::find(mod_list_http.begin(), mod_list_http.end(), mod_name) == mod_list_http.end()) { | ||
lua_pushnil(L); | ||
return 1; | ||
} | ||
|
||
lua_getglobal(L, "core"); | ||
lua_getfield(L, -1, "http_add_fetch"); | ||
|
||
lua_newtable(L); | ||
HTTP_API(fetch_async); | ||
HTTP_API(fetch_async_get); | ||
|
||
// Stack now looks like this: | ||
// <core.http_add_fetch> <table with fetch_async, fetch_async_get> | ||
// Now call core.http_add_fetch to append .fetch(request, callback) to table | ||
lua_call(L, 1, 1); | ||
|
||
return 1; | ||
} | ||
#endif | ||
|
||
void ModApiHttp::Initialize(lua_State *L, int top) | ||
{ | ||
#if USE_CURL | ||
API_FCT(request_http_api); | ||
#endif | ||
} |
Oops, something went wrong.