我正在尝试使用Axios和Cheerio的AWS Lambda函数进行演示,将端点称为{message:Internal Server Error}
后,我得到了响应。exports.lambdaHandler = async (event, context) => {
try {
const axios = require('axios');
const cheerio = require('cheerio');
axios.get('https://www.kitco.com').then((response) => {
const html = response.data;
const $ = cheerio.load(html);
const ask = $('#AU-ask').text();
const bid = $('#AU-bid').text();
const resbid = bid.slice(0,7);
const resask = ask.slice(0,7);
const result = {
"ask": resask,
"bid": resbid
}
return result;
});
response = {
'statusCode': 200,
'body': result
}
} catch (err) {
console.log(err);
return err;
}
return response
};
答案 0 :(得分:1)
result
显然不在response
范围内,因此将导致典型的undefined
错误。
解决方案是处理axios.get
回调中的逻辑,请尝试以下操作:
const axios = require('axios');
const cheerio = require('cheerio');
exports.lambdaHandler = (event, context) => {
axios.get('https://www.kitco.com')
.then((response) => {
const html = response.data;
const $ = cheerio.load(html);
const ask = $('#AU-ask').text();
const bid = $('#AU-bid').text();
const resbid = bid.slice(0, 7);
const resask = ask.slice(0, 7);
const result = {
statusCode: 200,
body: {
ask: resask,
bid: resbid
}
};
console.log(result);
})
.catch(err => {
console.log(err);
});
};
答案 1 :(得分:1)
您可以在Lambda控制台Web的“监视器”选项卡中获取错误详细信息。抱歉,您在response is undefined
行中收到类似return response
的错误。
使用您的代码,调用函数时将立即执行return response
行,但是response
范围中未定义lambdaHandler
。
我建议不要将async/await
语法与Promise语法(.then .catch)混合使用,只使用其中之一,我建议使用async/await
语法。
该功能将如下:
exports.lambdaHandler = async (event, context) => {
try {
const axios = require('axios');
const cheerio = require('cheerio');
const response = await axios.get('https://www.kitco.com'); // wait until we get the response
const html = response.data;
const $ = cheerio.load(html);
const ask = $('#AU-ask').text();
const bid = $('#AU-bid').text();
const resbid = bid.slice(0, 7);
const resask = ask.slice(0, 7);
const result = {
"ask": resask,
"bid": resbid
}
return {
statusCode: 200,
body: JSON.stringify(result), // If you working with lambda-proxy-integrations, the `body` must be a string
}; // return to response the request
} catch (err) {
console.log(err);
return {
statusCode: 500, // Example, http status will be 500 when you got an exception
body: JSON.stringify({error: err}),
}
}
};