NodeJS 使用 POST 将 POST 传递给外部 API
[英]NodeJS passing POST to external API using POST
问题描述
Getting a dreaded JSON error .
得到一个可怕的 JSON 错误。
I am using an external API that allegedly takes a POST to add a user to a group.我正在使用一个据称采用 POST 将用户添加到组的外部 API。 in my nodeJS express app - I want to pass-thru the data coming from my app to the external API.在我的 nodeJS express 应用程序中 - 我想将来自我的应用程序的数据传递到外部 API。
my "GET" methods work - but now I am trying to take a form submitted to my app, and pass the data to an external API using "POST".我的“GET”方法有效 - 但现在我试图将表单提交给我的应用程序，并使用“POST”将数据传递给外部 API。
Here is the code I am testing (assume the api url and credentials are correct - and NOT the issue) I have tested the external API passing the same JSON object directly to the external API using Postman, and it works without error.这是我正在测试的代码（假设 api url 和凭据是正确的 - 而不是问题）我已经测试了使用 Postman 将相同的 JSON 对象直接传递给外部 API 的外部 API，并且它可以正常工作。
const express = require('express');
const router = express.Router();
const https = require('https');
function callExternalAPI( RequestOptions ) {
return new Promise((resolve, reject) => {
https.request(
RequestOptions,
function(response) {
const { statusCode } = response;
if (statusCode >= 300) {
reject(
new Error( response.statusMessage )
);
}
const chunks = [];
response.on('data', (chunk) => {
chunks.push(chunk);
});
response.on('end', () => {
const result = Buffer.concat(chunks).toString();
resolve( JSON.parse(result) );
});
}
)
.end();
})
}
router.get('/thing', /*auth,*/ ( req, res, next ) => {
callExternalAPI(
{
host: 'api_url',
path: '/list',
method: 'GET',
headers: {
'Content-Type': 'application/json',
'Authorization': 'Basic ' + new Buffer( auth_un + ':' + auth_pw ).toString('base64')
}
}
)
.then(
response => {
console.log(response);
}
)
.catch(
error => {
console.log(error);
}
);
});
router.post('/thing', /*auth,*/ ( req, res, next ) => {
callExternalAPI(
{
host: 'api_url',
path: '/addThing',
method: 'POST',
headers: {
'Content-Type': 'application/json',
'Authorization': 'Basic ' + new Buffer( auth_un + ':' + auth_pw ).toString('base64')
},
data: {
'group_id': req.body.group_id,
'person_id': req.body.person_id
}
}
)
.then(
response => {
console.log(response);
}
)
.catch(
error => {
console.log(error);
}
);
});
module.exports = router;
console logging the req.body looks lie this控制台记录 req.body 看起来是这样的
{ group_id: '45b62b61-62fa-4684-a058-db3ef284f699', person_id: '3b1c915c-3906-42cf-8084-f9a25179d6b2' }
And the error looks like this错误看起来像这样
undefined:1
<html><title>JSpring Application Exception</title>
<h2>JSpring Exception Stack Trace</h2>
<pre>SafeException: FiberServer.parsers.parseJSONBuf(): JSON parse failed.
^
SyntaxError: Unexpected token < in JSON at position 0
Granted the console.log of the req.body does not have the required double quotes, but I think that is just the log dump format - but it might be munging the JSON.授予 req.body 的 console.log 没有所需的双引号，但我认为这只是日志转储格式 - 但它可能正在处理 JSON。 I have tried wrapping this in stringify;我曾尝试将其包装在 stringify 中； meaning something like this: data: JSON.stringify( req.body ) (but the same error occurs).意思是这样的： data: JSON.stringify( req.body ) （但发生同样的错误）。
callExternalAPI(
{
host: 'api_url',
path: '/addThing',
method: 'POST',
headers: {
'Content-Type': 'application/json',
'Authorization': 'Basic ' + new Buffer( auth_un + ':' + auth_pw ).toString('base64')
},
**data: JSON.stringify( req.body )**
}
)
I am testing this in postman, having the body be 'raw json' with headers as 'application/json' the body is this:我正在邮递员中对此进行测试，使正文为“原始 json”，标题为“应用程序/json”，正文是这样的：
{
"group_id": "45b62b61-62fa-4684-a058-db3ef284f699",
"person_id": "3b1c915c-3906-42cf-8084-f9a25179d6b2"
}
2 个解决方案
解决方案1
1 已采纳 2019-12-07 22:13:50
You should try to write the POST payload in the request body instead of passing it inside the options object:您应该尝试在请求正文中写入POST 有效负载，而不是将其传递到选项对象中：
function callExternalAPI( RequestOptions ) {
const { data, ...options } = RequestOptions;
return new Promise((resolve, reject) => {
const req = https.request(
options,
function(response) {
const { statusCode } = response;
if (statusCode >= 300) {
reject(
new Error( response.statusMessage )
);
}
const chunks = [];
response.on('data', (chunk) => {
chunks.push(chunk);
});
response.on('end', () => {
const result = Buffer.concat(chunks).toString();
resolve( JSON.parse(result) );
});
}
);
req.write(JSON.stringify(data));
req.end();
})
}
解决方案2
0 2019-12-07 22:04:59
In express you must use bodyParser At the top of the file when you initializing your express app add this lines在 express 中，您必须使用 bodyParser 在初始化 express 应用程序时在文件顶部添加此行
const app = express()
const bodyParser = require('body-parser')
app.use(bodyParser.urlencoded({ extended: false }))
app.use(bodyParser.json())
https://medium.com/@adamzerner/how-bodyparser-works-247897a93b90 https://medium.com/@adamzerner/how-bodyparser-works-247897a93b90
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