6 获取请求头和URL信息

@app.route("/req",methods=['GET','POST'])
def req():
    print(request.headers)      #请求头的信息全部在这里面
    print(request.json)         #None   Content-Type: application/json 的时候 数据是放到这里面的
    print(request.data)         #b'' #当 Content-Type 无法解析的时候 存放原始数据
    print(request.url)          #http://127.0.0.1/req
    print(request.path)         #/req
    print(request.host)         #127.0.0.1
    print(request.host_url)     #http://127.0.0.1/
    print(request.full_path)    #/req?
    return render_template("data.html")