Change content type to "UTF-8"

[ochatelain]

IS:

1. The media-type of XML messages is currently defined as application/xml.
2. In the example request <?xml version="1.0" encoding="UTF-8"?> is declared inside the file as text, but not mandatory.
   ... so the content-type negotiation would be up to the SU / SP ...
3. One Service User sent us XML without any encoding.
4. We expected for historic reason "ISO-8859-1" as default.

PROPOSAL

1. Let's change the media-type from application/xml to application/xml; charset=utf-8 in Release 5.0 and never talk about the issue again :-).

Here the location in the specification:

One of the sections affected - PAIN.001 upoad in PSS:

  /iso20022/payments:
    post:
      tags:
        - iso20022
      summary: Submit an ISO20022 XML payment instruction (PAIN.001)
      description: >
        Submit an ISO20022 XML PAIN.001 payment instruction.

        The submitted payment instruction must conform to the XML Schema and
        Implementation Guidelines defined by Swiss Payment Standards;

        see:
        https://www.six-interbank-clearing.com/en/home/standardization/iso-payments/customer-bank/implementation-guidelines.html
      operationId: submitIso20022PaymentInstruction
      parameters:
        - $ref: '#/components/parameters/permissionid_in_header'
        - $ref: '#/components/parameters/correlation_in_header'
        - $ref: '#/components/parameters/agent_in_header'
        - $ref: '#/components/parameters/targetid_in_header'
        - $ref: '#/components/parameters/psu_ip_in_header'
        - $ref: '#/components/parameters/psu_user_agent_in_header'
        - $ref: '#/components/parameters/optional_authorization_in_header'
        - $ref: '#/components/parameters/optional_instance_id_in_header'
      requestBody:
        required: true
        description: Payment instruction details as defined by data model.
        content:
          application/xml:
            schema:
              type: string

[RaulGuirao]

According to SPS pain and camt specification the messages need to be UTF-8 encoded.
We have noticed that banks may accept also other encodings too.

[RaulGuirao]

The adding of the «charset=utf-8» in the content header will not be any breaking change. bLink system will not validate if the enconding complies with UTF-8 therefore there will be no impact on serivce user nor service provider.
The adding helps to state more precise and clear which enconding is expected.

[svenbiellmann]

Meeting Notes 4.4.24

The pull request will be prepared and discussed on next meeting.