Python微信公众号后台开发<004>：图片上传及返回

# 用户发送图片
@robot.image
def blog(message,session
    print(dir(message)) 
    print(message.__dict__)
    print("msg", message.img)

def request_download(img_url, img_save_path):
    import requests
    r = requests.get(img_url)
    with open(img_save_path, 'wb') as f:
        f.write(r.content)

def get_access_token(appid, secret):
    '''获取access_token,100分钟刷新一次'''

    url = 'https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid={}&secret={}'.format(appid, secret)
    r = requests.get(url)
    parse_json = json.loads(r.content.decode())

    token = parse_json['access_token']

    return token


def img_upload(mediaType, name):
    token = get_access_token(app_id, secret)
    url = "https://api.weixin.qq.com/cgi-bin/media/upload?access_token=%s&type=%s" % (token, mediaType)
    files = {'media': open('{}'.format(name), 'rb')}
    r = requests.post(url, files=files)
    parse_json = json.loads(r.content.decode())

    return parse_json['media_id']

reply = ImageReply(media_id=media_id, message=message)
return reply

# 用户发送图片
@robot.image
def blog(message,session):
    changdu = str(len(session))
    print("changdu", session)

    # 保证图片名称唯一
    uuid = create_uuid()
    img_url = message.img
    img_path = "./Christmas_Hat/Image/" + uuid + ".png"
    img_outPath = "./Christmas_Hat/Image/out" + uuid + ".png"

    # print("msg", message.img)
    # print(dir(message)) # 获取对象所有属性
    # print(message.__dict__)
    # print("\n"+message.MediaId)

    # 下载图片
    request_download(img_url, img_path)
    # 图片处理
    add_hat(img_path, img_outPath)

    # 上传至服务器
    media_id = img_upload("image", img_outPath)
    # message.MediaId = media_id
    # 返回信息
    reply = ImageReply(media_id=media_id, message=message)
    return reply