Javascript AWS Lambda HTTP POST 请求 (Node.js)
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AWS Lambda HTTP POST Request (Node.js)
提问by Misuti
I'm relatively new to AWS lambda function and nodejs. I'm working on to try and get the list of 5 cities in a country by using HTTP POST request from this website: "http://www.webservicex.net/globalweather.asmx?op=GetCitiesByCountry"
我对 AWS lambda 函数和 nodejs 比较陌生。我正在尝试使用来自以下网站的 HTTP POST 请求来尝试获取一个国家/地区的 5 个城市的列表：“ http://www.webservicex.net/globalweather.asmx?op=GetCitiesByCountry”
I've been searching about how to do a HTTP POST request in lambda function but I can't seem to find a good explanation for it.
我一直在寻找如何在 lambda 函数中执行 HTTP POST 请求，但似乎找不到一个很好的解释。
Searches that I found for http post:
我为 http 帖子找到的搜索：
https://www.npmjs.com/package/http-postHow to make an HTTP POST request in node.js?
https://www.npmjs.com/package/http-post如何在 node.js 中发起 HTTP POST 请求？
采纳答案by Rupali Pemare
Try the following sample, invoking HTTP GET or POST request in nodejs from AWS lambda
尝试以下示例，从 AWS lambda 调用 nodejs 中的 HTTP GET 或 POST 请求
const options = {
hostname: 'hostname',
port: port number,
path: urlpath,
method: 'method type'
};
const req = https.request(options, (res) => {
res.setEncoding('utf8');
res.on('data', (chunk) => {
// code to execute
});
res.on('end', () => {
// code to execute
});
});
req.on('error', (e) => {
callback(null, "Error has occured");
});
req.end();
Consider the sample
考虑样本
回答by Luciano Marqueto
I had difficulty implementing the other answers so I'm posting what worked for me.
我很难实施其他答案，所以我发布了对我有用的内容。
In this case the function receives url, path and post data
在这种情况下，函数接收 url、path 和 post 数据
Lambda function
Lambda 函数
var querystring = require('querystring');
var http = require('http');
exports.handler = function (event, context) {
var post_data = querystring.stringify(
event.body
);
// An object of options to indicate where to post to
var post_options = {
host: event.url,
port: '80',
path: event.path,
method: 'POST',
headers: {
'Content-Type': 'application/x-www-form-urlencoded',
'Content-Length': Buffer.byteLength(post_data)
}
};
// Set up the request
var post_req = http.request(post_options, function(res) {
res.setEncoding('utf8');
res.on('data', function (chunk) {
console.log('Response: ' + chunk);
context.succeed();
});
res.on('error', function (e) {
console.log("Got error: " + e.message);
context.done(null, 'FAILURE');
});
});
// post the data
post_req.write(post_data);
post_req.end();
}
Example of call parameters
调用参数示例
{
"url": "example.com",
"path": "/apifunction",
"body": { "data": "your data"} <-- here your object
}
回答by valdeci
I think that the cleaner and more performatic way, without the needed of externals libs can be something like this:
我认为更干净、更高效的方式，不需要外部库，可以是这样的：
const https = require('https');
const doPostRequest = () => {
const data = {
value1: 1,
value2: 2,
};
return new Promise((resolve, reject) => {
const options = {
host: 'www.example.com',
path: '/post/example/action',
method: 'POST',
headers: {
'Content-Type': 'application/json'
}
};
//create the request object with the callback with the result
const req = https.request(options, (res) => {
resolve(JSON.stringify(res.statusCode));
});
// handle the possible errors
req.on('error', (e) => {
reject(e.message);
});
//do the request
req.write(JSON.stringify(data));
//finish the request
req.end();
});
};
exports.handler = async (event) => {
await doPostRequest()
.then(result => console.log(`Status code: ${result}`))
.catch(err => console.error(`Error doing the request for the event: ${JSON.stringify(event)} => ${err}`));
};
This lambda has been made and tested on following Runtimes: Node.js 8.10and Node.js 10.xand is able to do HTTPS requests, to do HTTP requests you need to import and change the object to http:
此 lambda 已在以下运行时制作和测试：Node.js 8.10并且Node.js 10.x能够执行 HTTPS 请求，要执行 HTTP 请求，您需要导入并将对象更改为http：
const http = require('http');
回答by Gurdev Singh
Use HTTP object and use POSTas the request type. HTTP requests in AWS Lambda are no different from HTTP requests using NodeJS.
使用 HTTP 对象并POST用作请求类型。AWS Lambda 中的 HTTP 请求与使用 NodeJS 的 HTTP 请求没有区别。
Let me know if you need any more help.
如果您需要更多帮助，请告诉我。
