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/*************************************************************************** |
/* SPDX-License-Identifier: GPL-3.0-or-later */ |
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article_cache.c - description |
/* |
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------------------- |
* article_cache |
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Copyright : (C) 2004-2025 by Leaflet |
* - convert article content from DB to local cache with LML conversion and line offset index |
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Email : leaflet@leafok.com |
* |
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***************************************************************************/ |
* Copyright (C) 2004-2025 Leaflet <leaflet@leafok.com> |
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*/ |
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/*************************************************************************** |
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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 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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***************************************************************************/ |
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#include "article_cache.h" |
#include "article_cache.h" |
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#include "lml.h" |
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#include "log.h" |
#include "log.h" |
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#include <errno.h> |
#include <errno.h> |
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#include <stdio.h> |
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#include <fcntl.h> |
#include <fcntl.h> |
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#include <stdio.h> |
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#include <stdlib.h> |
#include <stdlib.h> |
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#include <string.h> |
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#include <time.h> |
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#include <unistd.h> |
#include <unistd.h> |
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#include <sys/mman.h> |
#include <sys/mman.h> |
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#include <sys/stat.h> |
#include <sys/stat.h> |
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#include <strings.h> |
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#define _POSIX_C_SOURCE 200809L |
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#include <string.h> |
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#define ARTICLE_HEADER_MAX_LEN 4096 |
#define ARTICLE_HEADER_MAX_LEN 4096 |
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#define ARTICLE_CONTENT_MAX_LEN 1024 * 1024 * 4 // 4MB |
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#define ARTICLE_FOOTER_MAX_LEN 4096 |
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#define SUB_DT_MAX_LEN 50 |
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static const char *BBS_article_footer_color[] = { |
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"\033[31m", |
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"\033[32m", |
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"\033[33m", |
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"\033[34m", |
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"\033[35m", |
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"\033[36m", |
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"\033[37m", |
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}; |
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static const int BBS_article_footer_color_count = 7; |
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static char *content_f; // static buffer in large size |
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inline static int article_cache_path(char *file_path, size_t buf_len, const char *cache_dir, const ARTICLE *p_article) |
inline static int article_cache_path(char *file_path, size_t buf_len, const char *cache_dir, const ARTICLE *p_article) |
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{ |
{ |
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if (file_path == NULL || cache_dir == NULL || p_article == NULL) |
if (file_path == NULL || cache_dir == NULL || p_article == NULL) |
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{ |
{ |
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log_error("article_cache_path() NULL pointer error\n"); |
log_error("NULL pointer error\n"); |
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return -1; |
return -1; |
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} |
} |
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return 0; |
return 0; |
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} |
} |
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int article_cache_generate(const char *cache_dir, const ARTICLE *p_article, const SECTION_LIST *p_section, const char *content, int overwrite) |
int article_cache_generate(const char *cache_dir, const ARTICLE *p_article, const SECTION_LIST *p_section, |
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const char *content, const char *sub_ip, int overwrite) |
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{ |
{ |
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char data_file[FILE_PATH_LEN]; |
char data_file[FILE_PATH_LEN]; |
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int fd; |
int fd; |
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ARTICLE_CACHE cache; |
ARTICLE_CACHE cache; |
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struct tm tm_sub_dt; |
struct tm tm_sub_dt; |
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char str_sub_dt[50]; |
char str_sub_dt[SUB_DT_MAX_LEN + 1]; |
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char header[ARTICLE_HEADER_MAX_LEN]; |
char header[ARTICLE_HEADER_MAX_LEN]; |
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size_t header_len; |
size_t header_len; |
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long header_line_cnt; |
long header_line_cnt; |
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char footer[ARTICLE_FOOTER_MAX_LEN]; |
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size_t footer_len; |
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long footer_line_cnt; |
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long i; |
long i; |
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if (cache_dir == NULL || p_article == NULL || content == NULL) |
if (cache_dir == NULL || p_article == NULL || content == NULL) |
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{ |
{ |
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log_error("article_cache_generate() NULL pointer error\n"); |
log_error("NULL pointer error\n"); |
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return -1; |
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} |
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if (content_f == NULL && (content_f = malloc(ARTICLE_CONTENT_MAX_LEN)) == NULL) |
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{ |
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log_error("malloc(content_f) error: OOM\n"); |
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return -1; |
return -1; |
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} |
} |
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return -2; |
return -2; |
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} |
} |
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bzero(&cache, sizeof(cache)); |
memset(&cache, 0, sizeof(cache)); |
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// Generate article header |
// Generate article header / footer |
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localtime_r(&(p_article->sub_dt), &tm_sub_dt); |
localtime_r(&(p_article->sub_dt), &tm_sub_dt); |
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strftime(str_sub_dt, sizeof(str_sub_dt), "%c", &tm_sub_dt); |
strftime(str_sub_dt, sizeof(str_sub_dt), "%c %Z", &tm_sub_dt); |
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snprintf(header, sizeof(header), "发布者: %s (%s), 版块: %s (%s)\n标 题: %s\n发布于: %s (%s)\n\n", |
snprintf(header, sizeof(header), "鍙戝竷鑰: %s (%s), 鐗堝潡: %s (%s)\n鏍 棰: %s\n鍙戝竷浜: %s (%s)\n\n", |
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p_article->username, p_article->nickname, p_section->sname, p_section->stitle, p_article->title, BBS_name, str_sub_dt); |
p_article->username, p_article->nickname, p_section->sname, p_section->stitle, p_article->title, BBS_name, str_sub_dt); |
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snprintf(footer, sizeof(footer), |
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"\n--\n%s鈥 鏉ユ簮: %s http://%s [FROM: %s]\033[m\n\n", |
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BBS_article_footer_color[p_article->aid % BBS_article_footer_color_count], |
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BBS_name, BBS_server, sub_ip); |
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header_len = strnlen(header, sizeof(header)); |
header_len = strnlen(header, sizeof(header)); |
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cache.data_len = header_len + strlen(content); |
footer_len = strnlen(footer, sizeof(footer)); |
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header_line_cnt = split_data_lines(header, SCREEN_COLS, cache.line_offsets, MAX_SPLIT_FILE_LINES, 1, NULL); |
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if (header_len != cache.line_offsets[header_line_cnt]) |
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{ |
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#ifdef _DEBUG |
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log_error("Header of article(aid=%d) is truncated from %ld to %ld\n", p_article->aid, header_len, cache.line_offsets[header_line_cnt]); |
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#endif |
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header_len = (size_t)cache.line_offsets[header_line_cnt]; |
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} |
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// Apply LML render to content body |
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cache.data_len = header_len + (size_t)lml_render(content, content_f, ARTICLE_CONTENT_MAX_LEN, SCREEN_COLS, 0); |
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header_line_cnt = split_data_lines(header, SCREEN_COLS, cache.line_offsets, MAX_SPLIT_FILE_LINES); |
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cache.line_total = header_line_cnt + |
cache.line_total = header_line_cnt + |
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split_data_lines(content, SCREEN_COLS, cache.line_offsets + header_line_cnt, MAX_SPLIT_FILE_LINES - header_line_cnt); |
split_data_lines(content_f, SCREEN_COLS + 1, cache.line_offsets + header_line_cnt, MAX_SPLIT_FILE_LINES - header_line_cnt, 1, NULL); |
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if (cache.line_total >= MAX_SPLIT_FILE_LINES) |
if (cache.data_len - header_len != (size_t)cache.line_offsets[cache.line_total]) |
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{ |
{ |
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log_error("split_data_lines(%s) truncated over limit lines %d >= %d\n", data_file, cache.line_total, MAX_SPLIT_FILE_LINES); |
#ifdef _DEBUG |
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cache.line_total = MAX_SPLIT_FILE_LINES - 1; |
log_error("Body of article(aid=%d) is truncated from %ld to %ld\n", |
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p_article->aid, cache.data_len - header_len, cache.line_offsets[cache.line_total]); |
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#endif |
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cache.data_len = header_len + (size_t)(cache.line_offsets[cache.line_total]); |
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} |
} |
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for (i = header_line_cnt; i <= cache.line_total; i++) |
for (i = header_line_cnt; i <= cache.line_total; i++) |
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cache.line_offsets[i] += (long)header_len; |
cache.line_offsets[i] += (long)header_len; |
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} |
} |
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if (write(fd, &cache, sizeof(cache)) == -1) |
footer_line_cnt = split_data_lines(footer, SCREEN_COLS, cache.line_offsets + cache.line_total, MAX_SPLIT_FILE_LINES - cache.line_total, 1, NULL); |
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if (footer_len != cache.line_offsets[cache.line_total + footer_line_cnt]) |
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{ |
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#ifdef _DEBUG |
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log_error("Footer of article(aid=%d) is truncated from %ld to %ld\n", |
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p_article->aid, footer_len, cache.line_offsets[cache.line_total + footer_line_cnt]); |
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#endif |
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footer_len = (size_t)(cache.line_offsets[cache.line_total + footer_line_cnt]); |
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} |
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for (i = 0; i <= footer_line_cnt; i++) |
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{ |
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cache.line_offsets[cache.line_total + i] += (long)cache.data_len; |
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} |
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cache.data_len += footer_len; |
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cache.line_total += footer_line_cnt; |
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cache.mmap_len = sizeof(cache) - sizeof(long) * (MAX_SPLIT_FILE_LINES - (size_t)(cache.line_total) - 1) + cache.data_len; |
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if (write(fd, &cache, cache.mmap_len - cache.data_len) == -1) |
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{ |
{ |
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log_error("write(%s, cache) error (%d)\n", data_file, errno); |
log_error("write(%s, cache) error (%d)\n", data_file, errno); |
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close(fd); |
close(fd); |
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close(fd); |
close(fd); |
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return -3; |
return -3; |
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} |
} |
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if (write(fd, content, cache.data_len - header_len) == -1) |
if (write(fd, content_f, cache.data_len - header_len - footer_len) == -1) |
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{ |
{ |
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log_error("write(%s, content) error (%d)\n", data_file, errno); |
log_error("write(%s, content) error (%d)\n", data_file, errno); |
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close(fd); |
close(fd); |
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return -3; |
return -3; |
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} |
} |
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if (write(fd, footer, footer_len) == -1) |
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{ |
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log_error("write(%s, footer) error (%d)\n", data_file, errno); |
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close(fd); |
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return -3; |
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} |
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if (close(fd) == -1) |
if (close(fd) == -1) |
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{ |
{ |
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return 0; |
return 0; |
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} |
} |
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void article_cache_cleanup(void) |
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{ |
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if (content_f) |
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{ |
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free(content_f); |
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content_f = NULL; |
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} |
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} |
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int article_cache_load(ARTICLE_CACHE *p_cache, const char *cache_dir, const ARTICLE *p_article) |
int article_cache_load(ARTICLE_CACHE *p_cache, const char *cache_dir, const ARTICLE *p_article) |
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{ |
{ |
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char data_file[FILE_PATH_LEN]; |
char data_file[FILE_PATH_LEN]; |
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if (p_cache == NULL || cache_dir == NULL || p_article == NULL) |
if (p_cache == NULL || cache_dir == NULL || p_article == NULL) |
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{ |
{ |
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log_error("article_cache_load() NULL pointer error\n"); |
log_error("NULL pointer error\n"); |
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return -1; |
return -1; |
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} |
} |
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return -2; |
return -2; |
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} |
} |
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memcpy((void *)p_cache, p_mmap, sizeof(ARTICLE_CACHE)); |
if (((ARTICLE_CACHE *)p_mmap)->mmap_len != mmap_len) |
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if (sizeof(ARTICLE_CACHE) + p_cache->data_len != mmap_len) |
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{ |
{ |
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log_error("Inconsistent length, cache_len(%ld) + data_len(%ld) != mmap_len(%ld)\n", |
log_error("Inconsistent mmap len of article (cid=%d), %ld != %ld\n", p_article->cid, p_cache->mmap_len, mmap_len); |
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sizeof(ARTICLE_CACHE), p_cache->data_len, mmap_len); |
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if (munmap(p_mmap, mmap_len) < 0) |
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{ |
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log_error("munmap() error (%d)\n", errno); |
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} |
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return -3; |
return -3; |
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} |
} |
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memset(p_cache, 0, sizeof(*p_cache)); |
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memcpy((void *)p_cache, p_mmap, (size_t)(((ARTICLE_CACHE *)p_mmap)->mmap_len - ((ARTICLE_CACHE *)p_mmap)->data_len)); |
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p_cache->p_mmap = p_mmap; |
p_cache->p_mmap = p_mmap; |
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p_cache->p_data = p_mmap + sizeof(ARTICLE_CACHE); |
p_cache->p_data = (char *)p_mmap + (p_cache->mmap_len - p_cache->data_len); |
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return 0; |
return 0; |
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} |
} |
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{ |
{ |
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if (p_cache == NULL || p_cache->p_mmap == NULL) |
if (p_cache == NULL || p_cache->p_mmap == NULL) |
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{ |
{ |
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log_error("article_cache_unload() NULL pointer error\n"); |
log_error("NULL pointer error\n"); |
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return -1; |
return -1; |
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} |
} |
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if (munmap(p_cache->p_mmap, sizeof(ARTICLE_CACHE) + p_cache->data_len) < 0) |
if (munmap(p_cache->p_mmap, p_cache->mmap_len) < 0) |
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{ |
{ |
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log_error("munmap() error (%d)\n", errno); |
log_error("munmap() error (%d)\n", errno); |
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return -2; |
return -2; |