Tableau: Unable to upload Data Source using REST. [NodeJS] - node.js

Question

I am trying to upload a data source to my tableau site using the following code:
const request = require('request')
const fs = require('fs')
const options = {
url: 'https://prod-apnortheast-a.online.tableau.com/api/3.12/sites/578341b7-325c-4dda-be08-ff0b10c4b18c/datasources',
headers: {
Authorization: 'Bearer xxxxxxxxxxxxxx',
'Content-Type': 'application/xml;charset=UTF-8',
boundary: 'boundary-string'
},
body: `--boundary-string
Content-Disposition: name="request_payload"
Content-Type: text/xml
<tsRequest>
<datasource name="datasource-name"
description="datasource-description">
<connectionCredentials name="xxxx#abc.com"
password="xxxxxx"/>
<project id="96ec15ee-eef1-41ac-beda-1f03d9209305" />
</datasource>
</tsRequest>
--boundary-string
Content-Disposition: name="tableau_datasource"; filename="datasource-file-name"
Content-Type: application/octet-stream
This is the content of data source file.
Hello from Mayank
--boundary-string--`
}
function callback (error, response, body) {
if (error) {
console.log(error)
}
console.log( body, response.headers, response.statusCode)
}
request.post(options, callback)
But instead of a successful upload, I get the following error:
Response Body:
<?xml version='1.0' encoding='UTF-8'?><tsResponse xmlns="http://tableau.com/api" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://tableau.com/api http://tableau.com/api/ts-api-3.12.xsd"><error code="406000"><summary>Bad Request</summary><detail>Content type 'application/xml;charset=UTF-8' not supported</detail></error></tsResponse>
Response Headers:
{
'content-type': 'application/xml;charset=UTF-8',
date: 'Mon, 30 Aug 2021 08:17:57 GMT',
p3p: 'CP="NON"',
'referrer-policy': 'strict-origin-when-cross-origin',
server: 'Tableau',
'set-cookie': [
'hid=pdanaa-hap01; domain=.prod-apnortheast-a.online.tableau.com; path=/; HttpOnly; Secure; SameSite=None',
'AWSELB=05DBF7950E7E74D8AC3E3765F2EF65B6BB96F639EDB7A6D781435ACF3E27CEC2643898FB33239EFFBCA90E45D6EE0951AC6ECA4251ACA4E386D74627D58239403899B395F5F04C31144F69D44D5789C3FA7D6D9DC6;PATH=/;DOMAIN=.prod-apnortheast-a.online.tableau.com;SECURE;HTTPONLY;SAMESITE=None'
],
'strict-transport-security': 'max-age=31536000; includeSubDomains',
tableau_error_code: '0xE3C7443A',
tableau_error_source: 'NeedsClassification',
tableau_service_name: 'vizportal',
tableau_status_code: '2',
'x-content-type-options': 'nosniff',
'x-tableau': 'Tableau Server',
'x-ua-compatible': 'IE=Edge',
'x-xss-protection': '1; mode=block',
'content-length': '365',
connection: 'Close'
}
Response Status Code: 406
References:
https://help.tableau.com/current/api/rest_api/en-us/REST/rest_api_ref_publishing.htm#publish_data_source
https://help.tableau.com/current/api/rest_api/en-us/REST/rest_api_ref.htm

Answer 1

According to Tableau's documentation here
The Content-Type header for the request must be set to multipart/mixed; boundary=boundary-string.
Although I'm using PHP, I had this exact same error as you while trying to publish flows using the API. Changing to "multipart/mixed" in the Content-Type fixed it for me (wasn't the end of my problems though). So maybe changing your code to
...
headers: {
Authorization: 'Bearer xxxxxxxxxxxxxx',
'Content-Type': 'multipart/mixed; boundary=boundary-string'
},
...
could do the trick.
Please notice the content type change and that boundary is not a header by itself like you did.
Just note, your example code as it is might still generate 400 errors since that's not a valid data source file. Since I run Tableau Server I had to do a lot of troubleshooting by tailing the logs at the server and try to figure what was wrong.