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from flask import Flask, render_template, abort, request
import os
from config import LOG_ROOT, ALLOWED_EXTENSIONS, MAX_LINES_PER_PAGE
import vvdutils as vv
import pathlib
app = Flask(__name__)
app.config['SEND_FILE_MAX_AGE_DEFAULT'] = 10  # 静态文件缓存10s
def is_safe_path(path):
    """增强路径安全检查"""
    target = os.path.abspath(os.path.join(LOG_ROOT, path))
    return os.path.commonpath([LOG_ROOT, target]) == LOG_ROOT
@app.route('/')
def index():
    return browse('')
@app.route('/browse/<path:subpath>')
def browse(subpath):
    if not is_safe_path(subpath):
        abort(403)
        abs_path = os.path.join(LOG_ROOT, subpath)
    if not os.path.exists(abs_path):
        abort(404)
        entries = []
    try:
        for entry in sorted(os.listdir(abs_path), key=lambda x: (not os.path.isdir(os.path.join(abs_path, x)), x.lower())):
            entry_path = os.path.join(subpath, entry)
            full_path = os.path.join(abs_path, entry)
            # 最后修改时间（所有系统通用）
            if os.path.isdir(full_path):
                time_info = vv.get_file_time(full_path, datetime_res=True)
                entries.append({
                    'name': entry,
                    'path': entry_path,
                    'is_dir': True,
                    'size': '-',
                    'modify_time': vv.time_string(datetime_obj=time_info['modify_time']),
                    'created_time': vv.time_string(datetime_obj=time_info['create_time'])
                })
            else:
                ext = pathlib.Path(entry).suffix[1:].lower()
                if ext not in ALLOWED_EXTENSIONS:
                    continue
                time_info = vv.get_file_time(full_path, datetime_res=True)
                entries.append({
                    'name': entry,
                    'path': entry_path,
                    'is_dir': False,
                    'size': os.path.getsize(full_path),
                    'modify_time': vv.time_string(datetime_obj=time_info['modify_time']),
                    'created_time': vv.time_string(datetime_obj=time_info['create_time'])
                })
    except PermissionError:
        abort(403)
        parent = os.path.dirname(subpath)
    return render_template('browse.html',
                         entries=entries,
                         current_path=subpath,
                         parent=parent)
# @lru_cache(maxsize=100) # 由于时刻在变化，不能缓存
def get_cached_line_count(filepath):
    return vv.get_file_line_number(filepath)
@app.route('/view/<path:filepath>')
def view_file(filepath):
    if not is_safe_path(filepath):
        abort(403)
        page = request.args.get('page', 1, type=int)
    search_term = request.args.get('search', '').lower()
    abs_path = os.path.join(LOG_ROOT, filepath)
        if not os.path.isfile(abs_path):
        abort(404)
        try:
        total_lines = get_cached_line_count(abs_path)
    except Exception as e:
        app.logger.error(f"读取文件行数失败: {str(e)}")
        abort(500)
        total_pages = max(1, (total_lines + MAX_LINES_PER_PAGE - 1) // MAX_LINES_PER_PAGE)
    page = max(1, min(page, total_pages))
        try:
        with open(abs_path, 'r', encoding='utf-8', errors='ignore') as f:
            start_line = (page - 1) * MAX_LINES_PER_PAGE
            content = []
            for _ in range(start_line):
                if not f.readline():
                    break
            for _ in range(MAX_LINES_PER_PAGE):
                line = f.readline()
                if not line:
                    break
                if search_term in line.lower():
                    content.append(line)
    except IOError as e:
        app.logger.error(f"文件读取失败: {str(e)}")
        abort(500)
        return render_template('view.html',
                         filename=os.path.basename(filepath),
                         content=''.join(content),
                         filepath=filepath,
                         page=page,
                         total_pages=total_pages)
@app.errorhandler(404)
def page_not_found(e):
    return render_template('404.html'), 404
@app.errorhandler(403)
def forbidden(e):
    return render_template('403.html'), 403
if __name__ == '__main__':
    app.run(debug=True)