Alexa 检索图像的技能

Question

现在我的技能有两个槽

• (1) 详细信息编号
• (2) 页码。

技能正确获取这些槽位并成功将它们重复给用户。

但是，我想要从具有这些插槽作为文件名的 S3 存储桶中提取和映像的技能（即 detailNumber-pageNumber.png）。如何实现？

class LaunchRequestHandler(AbstractRequestHandler):
"""Handler for Skill Launch."""
def can_handle(self, handler_input):
    # type: (HandlerInput) -> bool
    return ask_utils.is_request_type("LaunchRequest")(handler_input)

def handle(self, handler_input):
    # type: (HandlerInput) -> Response
    speak_output = "Welcome, to fabrication. What detail would you like to view?"
    reprompt_text = "Open detail 5 on LSF-900."

    return (
        handler_input.response_builder
            .speak(speak_output)
            .ask(reprompt_text)
            .response
    )

---

class OpenDetailIntentHandler(AbstractRequestHandler):
"""Handler for Open Detail Intent."""
def can_handle(self, handler_input):
    # type: (HandlerInput) -> bool
    return ask_utils.is_intent_name("OpenDetailIntent")(handler_input)

def handle(self, handler_input):
    # type: (HandlerInput) -> Response
    slots = handler_input.request_envelope.request.intent.slots
    detailNumber = slots["detailNumber"].value
    pageNumber = slots["pageNumber"].value
    speak_output = 'Thanks, I will show you detail {detailNumber} on page LSF {pageNumber}.'.format(detailNumber=detailNumber, pageNumber=pageNumber)

    return (
        handler_input.response_builder
            .speak(speak_output)
            # .ask("add a reprompt if you want to keep the session open for the user to respond")
            .response
    )

Answer 1

如果您使用 s3 Alexa Hosted

1. 确保您的文件在 s3 上
2. Create a presigned URL：

示例 >

from ask_sdk_model import ui
from utils import create_presigned_url

def handle(self, handler_input):
    # type: (HandlerInput) -> Response
    image_url = create_presigned_url("Media/" + detailNumber + "-" + pageNumber +" .png")
    

utils.py（在开发者控制台的临时模板中可用）

import logging
import os
import boto3
from botocore.exceptions import ClientError


def create_presigned_url(object_name):
    """Generate a presigned URL to share an S3 object with a capped expiration of 60 seconds

    :param object_name: string
    :return: Presigned URL as string. If error, returns None.
    """
    s3_client = boto3.client('s3',
                             region_name=os.environ.get('S3_PERSISTENCE_REGION'),
                             config=boto3.session.Config(signature_version='s3v4',s3={'addressing_style': 'path'}))
    try:
        bucket_name = os.environ.get('S3_PERSISTENCE_BUCKET')
        response = s3_client.generate_presigned_url('get_object',
                                                    Params={'Bucket': bucket_name,
                                                            'Key': object_name},
                                                    ExpiresIn=60*1)
    except ClientError as e:
        logging.error(e)
        return None

    # The response contains the presigned URL
    return response

确保使用 Media 作为 Alexa 托管技能的默认父文件夹。

如果您不使用 s3 Alexa Hosted

如果如上所述 s3 不是公开的，那么您可以直接提供 s3 的路径，或者创建具有适当权限的签名 URL。