146 lines
3.7 KiB
C
146 lines
3.7 KiB
C
/*
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* Treebird - Lightweight frontend for Pleroma
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* Copyright (C) 2022 Nekobit
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#include <fcgi_stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include "cookie.h"
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#include "key.h"
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enum cookie_state
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{
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STATE_C_NEUTRAL,
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STATE_C_STARTSP,
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STATE_K_START,
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STATE_V_START,
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};
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struct cookie_values cookies = { 0 };
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char* read_cookies_env()
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{
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struct http_cookie_info info;
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char* cookies_env = getenv("HTTP_COOKIE");
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// Is it even work bothering with?
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if (!cookies_env)
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return NULL;
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char* cookies_str = malloc(strlen(cookies_env));
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if (!cookies_str)
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{
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printf("malloc");
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return NULL;
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}
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strcpy(cookies_str, cookies_env);
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char* cookies_read = cookies_str;
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// Will loop through these
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struct key_value_refs refs[] = {
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{ "access_token", &(cookies.access_token) },
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{ "logged_in", &(cookies.logged_in) },
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{ "theme", &(cookies.theme) }
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};
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do
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{
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cookies_read = parse_cookies(cookies_read, &info);
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if (!(info.key && info.val)) break;
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for (int i = 0; i < (sizeof(refs)/sizeof(refs[0])); ++i)
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{
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if (strcmp(info.key, refs[i].key) == 0)
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*(refs[i].val) = info.val;
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}
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}
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while (cookies_read);
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// User is responsible for freeing when done!
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return cookies_str;
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}
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char* parse_cookies(char* begin, struct http_cookie_info* info)
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{
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int keydone = 0;
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enum cookie_state state = STATE_C_STARTSP;
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int end = 0;
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size_t val_s = 0;
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for (; *begin != ';' && *begin != '\0'; ++begin)
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{
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switch (*begin)
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{
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case '=':
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if (state == STATE_K_START) keydone = 1;
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state = STATE_C_STARTSP;
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*begin = '\0'; // Null ptr
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break;
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case ' ':
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// longkeyval = res;
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// ^ ^
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if (state == STATE_C_STARTSP ||
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state == STATE_K_START)
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break;
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// fall
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default:
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if (state == STATE_C_STARTSP)
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{
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if (keydone) info->val = begin;
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else info->key = begin;
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state = keydone ? STATE_V_START : STATE_K_START;
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}
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if (keydone) ++val_s;
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}
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}
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// Which character did we stop at?
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if (*begin == '\0')
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end = 1;
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else if (*begin == ';')
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*begin = '\0';
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// The val length may be large, so strlen can waste time
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info->val_len = val_s;
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return end ? NULL : begin+1;
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}
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int cookie_get_val(char* src, char* key, struct http_cookie_info* info)
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{
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struct http_cookie_info read_info;
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char* src_read = src;
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while (1)
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{
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src_read = parse_cookies(src_read, &read_info);
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if (!(read_info.key && read_info.val)) break;
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if (strcmp(read_info.key, key) == 0)
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{
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info->key = read_info.key;
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info->val = read_info.val;
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info->val_len = read_info.val_len;
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return 0;
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}
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if (!src_read) break;
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}
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return 1;
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}
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