fix UnicodeEncodeError
fix UnicodeEncodeError

if the content contain Chinese or other Non-English language, it will throw UnicodeEncodeError
lucius-feng/flaskbb,dromanow/flaskbb,zky001/flaskbb,qitianchan/flaskbb,zky001/flaskbb,dromanow/flaskbb,lucius-feng/flaskbb,dromanow/flaskbb,lucius-feng/flaskbb,realityone/flaskbb,realityone/flaskbb,qitianchan/flaskbb,zky001/flaskbb,realityone/flaskbb,qitianchan/flaskbb