我构建了一个圣杯Web应用程序,该应用程序托管在s3存储桶中,并调用xgboost端点。通过网络应用程序调用模型时,我总是收到错误消息。当我查看Lambda日志文件时,发现输入未正确解码。 input_text = app.current_request.raw_body.decode()
从二进制解码输入的正确代码是什么,以便我可以将常规字符串传递给端点?
这是错误:
botocore.errorfactory.ModelError:调用InvokeEndpoint操作时发生错误(ModelError):从模型收到消息为“无法将字符串转换为float:user_input = 1%”的客户端错误(415)。
这是我的index.html文件:
<html>
<head></head>
<body>
<form method="post" action="<chalice_deployed_http>">
<input type="text" name="user_input"><br>
<input type="submit" value="Submit">
</form>
</body>
</html>
这是我的app.py文件:
try:
from StringIO import StringIO
except ImportError:
from io import StringIO
from io import BytesIO
import csv
import sys, os, base64, datetime, hashlib, hmac
from chalice import Chalice, NotFoundError, BadRequestError
import boto3
app = Chalice(app_name='<name_of_chalice_app>')
app.debug = True
sagemaker = boto3.client('sagemaker-runtime')
@app.route('/', methods=['POST'], content_types=['application/x-www-form-urlencoded'])
def handle_data():
input_text = app.current_request.raw_body.decode()
res = sagemaker.invoke_endpoint(
EndpointName='<endpoint_name>',
Body=input_text,
ContentType='text/csv',
Accept='Accept'
)
return res['Body'].read().decode()[0]
我应该能够传递这样的字符串:
'1,4,26,0.076923077,2,3,1,0.611940299,0.7818181820000001,0.40376569,0.571611506,0.12,12,1,0.0,2,1.0,1,2,6,3,1,1, 1,1,1,3,1,0.000666667,1,1,2,2,-1.0,0.490196078,-1.0,0.633928571,6.0,145,2,2,1,3,2,2,1,3, 2,3,3,-1.0,1,3,1,1,2,1,2,3,1,3,3,1,3,2,3,-1.0,3,3,1,2, 2,1,3,3,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,3,0.3497921158934803,0'
并获得如下输出:
'5'
答案 0 :(得分:0)
这有效:
input_text = app.current_request.raw_body
d = parse_qs(input_text)
lst = d[b'user_input'][0].decode()
res = sagemaker.invoke_endpoint(
EndpointName='<name-of-SageMaker-Endpoint>',
Body=lst,
ContentType='text/csv',
Accept='Accept'
)
答案 1 :(得分:0)
此博客文章显示了如何从Chalice应用程序调用SageMaker端点。它使用内置的图像分类算法,但是将其适应XGBoost不会有任何麻烦。
https://medium.com/@julsimon/using-chalice-to-serve-sagemaker-predictions-a2015c02b033