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Getting XML data into the platform

Description

There are multiple ways you could process externally-stored XML data, here we will describe some common patterns on getting XML data into your integration flow.

Accepting XML payload over HTTP

You can send an XML Payload over HTTP and it will be accepted by the WebHook component. You can do this in two ways:

HTTP Post with XML as a Body

You can send your XML document as a Body via HTTP Post. Your HTTP request must have the following properties:

  • HTTP Request method should be POST,
  • Content type of your request should be application/xml,
  • Body of your HTTP request should only include your XML content,
  • Whole HTTP POST with the header must not be bigger than 10MB, otherwise it will be rejected.

Here how you can post your XML data using curl

curl -X POST -H "Content-Type: application/xml" \
  -d '<foo>Hello XML!</foo>' \
  https://in.platform.address/hooks/your-hook

In this case, your XML document will be parsed and transformed into JSON document automatically (learn how to prevent automatic parsing). Resulting JSON Document will be used as placed in a body of your message and message will be sent to the next component in the flow. Here is how such message will look like:

{
  "id": "2b90def0-d250-11e6-a2f1-5b2841bfd572",
  "attachments": {},
  "body": {
    "foo": "Hello XML!"
  },
  "headers": {
    "x-real-ip": "10.0.5.31, 10.0.5.31",
    "host": "in.platform.address",
    "x-forwarded-for": "10.0.5.31",
    "x-nginx-proxy": "true",
    "x-forwarded-proto": "https",
    "connection": "upgrade",
    "content-length": "21",
    "user-agent": "curl/7.51.0",
    "accept": "*/*",
    "content-type": "application/xml"
  }
}

NOTE: your XML payload will be automatically parsed and transformed to JSON and if it is an invalid XML document the platform will return HTTP 400 "Bad Request" error (e.g. close tag is missing).

I want to prevent body transformation

In case you want avoid body transformation to JSON, use raw query parameter (?raw=true) like below:

curl -X POST -H "Content-Type: application/xml" \
  -d '<foo>Hello XML!</foo>' \
  https://in.platform.address/hooks/your-hook?raw=true

This works for any payload, including XML.

HTTP Post with XML file as attachment

If you don’t like how XML is parsed and represented as JSON object or you would like to preserve your XML file for further processing, then you can send your XML file in attachment - using multipart/form-data content type, so your HTTP request must have the following properties:

  • Method must be POST,
  • Content type must be multipart/form-data,
  • We highly recommend to have the attached file content type as application/xml,
  • Whole HTTP POST with the header and the attachment must not be bigger than 10MB, otherwise it will be rejected.

After receiving such HTTP request WebHook component will upload your file to the platform attachments storage and place a reference to it inside the attachments part of the generate message:

{
  "id": "2b90def0-d250-11e6-a2f1-6b2841bfd574",
  "attachments": {
    "data.xml" : {
      "url": "http://attachment_storage_URL/files/1cfc3a71-d7a7-44e6-a15e-ae18860d537c",
      "content-type": "application/xml"
    }
  },
  "body": {
  },
  "headers": {
    "x-real-ip": "10.0.5.31, 10.0.5.31",
    "host": "in.platform.address",
    "x-forwarded-for": "10.0.5.31",
    "x-nginx-proxy": "true",
    "x-forwarded-proto": "https",
    "connection": "upgrade",
    "content-length": "21",
    "user-agent": "curl/7.51.0",
    "accept": "*/*",
    "content-type": "application/xml"
  }
}

NOTE: The platform will not parse your XML file. It will be temporarily stored for the next steps in the integration flow to pick and process this file. It is the responsibility of the following components to handle parsing/validation/transformation later.

Reading XML files from external location

You can read XML files from the external location, e.g. URI or FTP or any other file storage service. For example, you can take the SFTP component, every file SFTP component will find on your server will be sent as an attachment, similar to the sample above. If you would like to parse the attachments.