letters.py 文件源码

def tail():
    if request.method == 'POST':
        fi = request.form['file']
        if os.path.isfile(fi):
            n = int(request.form['n'])
            le = io.open(fi, 'r', encoding='utf-8')
            taildata = le.read()[-n:]
            le.close()
        else:
            taildata = "No such file."
        return render_template('tail.html',taildata=taildata)