3 Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU Lesser General Public License as published by
7 the Free Software Foundation; either version 2.1 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public License along
16 with this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
20 #include "lua_api/l_internal.h"
21 #include "common/c_converter.h"
22 #include "common/c_content.h"
23 #include "lua_api/l_http.h"
24 #include "httpfetch.h"
33 #define HTTP_API(name) \
34 lua_pushstring(L, #name); \
35 lua_pushcfunction(L, l_http_##name); \
39 void ModApiHttp::read_http_fetch_request(lua_State *L, HTTPFetchRequest &req)
41 luaL_checktype(L, 1, LUA_TTABLE);
43 req.caller = httpfetch_caller_alloc_secure();
44 getstringfield(L, 1, "url", req.url);
45 lua_getfield(L, 1, "user_agent");
46 if (lua_isstring(L, -1))
47 req.useragent = getstringfield_default(L, 1, "user_agent", "");
49 req.multipart = getboolfield_default(L, 1, "multipart", false);
50 req.timeout = getintfield_default(L, 1, "timeout", 3) * 1000;
52 // post_data: if table, post form data, otherwise raw data
53 lua_getfield(L, 1, "post_data");
54 if (lua_istable(L, 2)) {
56 while (lua_next(L, 2) != 0) {
57 req.post_fields[readParam<std::string>(L, -2)] = readParam<std::string>(L, -1);
60 } else if (lua_isstring(L, 2)) {
61 req.post_data = readParam<std::string>(L, 2);
65 lua_getfield(L, 1, "extra_headers");
66 if (lua_istable(L, 2)) {
68 while (lua_next(L, 2) != 0) {
69 req.extra_headers.emplace_back(readParam<std::string>(L, -1));
76 void ModApiHttp::push_http_fetch_result(lua_State *L, HTTPFetchResult &res, bool completed)
79 setboolfield(L, -1, "succeeded", res.succeeded);
80 setboolfield(L, -1, "timeout", res.timeout);
81 setboolfield(L, -1, "completed", completed);
82 setintfield(L, -1, "code", res.response_code);
83 setstringfield(L, -1, "data", res.data);
86 // http_api.fetch_async(HTTPRequest definition)
87 int ModApiHttp::l_http_fetch_async(lua_State *L)
92 read_http_fetch_request(L, req);
94 infostream << "Mod performs HTTP request with URL " << req.url << std::endl;
97 // Convert handle to hex string since lua can't handle 64-bit integers
98 std::stringstream handle_conversion_stream;
99 handle_conversion_stream << std::hex << req.caller;
100 std::string caller_handle(handle_conversion_stream.str());
102 lua_pushstring(L, caller_handle.c_str());
106 // http_api.fetch_async_get(handle)
107 int ModApiHttp::l_http_fetch_async_get(lua_State *L)
109 NO_MAP_LOCK_REQUIRED;
111 std::string handle_str = luaL_checkstring(L, 1);
113 // Convert hex string back to 64-bit handle
115 std::stringstream handle_conversion_stream;
116 handle_conversion_stream << std::hex << handle_str;
117 handle_conversion_stream >> handle;
120 bool completed = httpfetch_async_get(handle, res);
122 push_http_fetch_result(L, res, completed);
127 int ModApiHttp::l_request_http_api(lua_State *L)
129 NO_MAP_LOCK_REQUIRED;
131 // We have to make sure that this function is being called directly by
132 // a mod, otherwise a malicious mod could override this function and
133 // steal its return value.
136 // Make sure there's only one item below this function on the stack...
137 if (lua_getstack(L, 2, &info)) {
140 FATAL_ERROR_IF(!lua_getstack(L, 1, &info), "lua_getstack() failed");
141 FATAL_ERROR_IF(!lua_getinfo(L, "S", &info), "lua_getinfo() failed");
143 // ...and that that item is the main file scope.
144 if (strcmp(info.what, "main") != 0) {
148 // Mod must be listed in secure.http_mods or secure.trusted_mods
149 lua_rawgeti(L, LUA_REGISTRYINDEX, CUSTOM_RIDX_CURRENT_MOD_NAME);
150 if (!lua_isstring(L, -1)) {
154 std::string mod_name = readParam<std::string>(L, -1);
155 std::string http_mods = g_settings->get("secure.http_mods");
156 http_mods.erase(std::remove(http_mods.begin(), http_mods.end(), ' '), http_mods.end());
157 std::vector<std::string> mod_list_http = str_split(http_mods, ',');
159 std::string trusted_mods = g_settings->get("secure.trusted_mods");
160 trusted_mods.erase(std::remove(trusted_mods.begin(), trusted_mods.end(), ' '), trusted_mods.end());
161 std::vector<std::string> mod_list_trusted = str_split(trusted_mods, ',');
163 mod_list_http.insert(mod_list_http.end(), mod_list_trusted.begin(), mod_list_trusted.end());
164 if (std::find(mod_list_http.begin(), mod_list_http.end(), mod_name) == mod_list_http.end()) {
169 lua_getglobal(L, "core");
170 lua_getfield(L, -1, "http_add_fetch");
173 HTTP_API(fetch_async);
174 HTTP_API(fetch_async_get);
176 // Stack now looks like this:
177 // <core.http_add_fetch> <table with fetch_async, fetch_async_get>
178 // Now call core.http_add_fetch to append .fetch(request, callback) to table
185 void ModApiHttp::Initialize(lua_State *L, int top)
188 API_FCT(request_http_api);