Parsing ISO8601 date time from server fails due to milliseconds

[laurensvm]

Question

The server returns date-time strings as 2023-12-28T11:08:38.303+01:00. The default JSONDecoder does not parse this properly and an extension is required to fallback to millisecond parsing. I'm wondering what in your opinion is the best way to solve this issue (preferably without changing the openapi spec, as many other services rely on it. I know it would be possible to parse it as a string and convert to Date manually, but this would require changing the openapi spec). Is it possible to provide a custom JSONDecoder to the generator with a DateFormatter able to handle the millisecond ISO8601 date-time?

Thanks a lot for this project and your help!

[simonjbeaumont]

@laurensvm Client.init accepts a configuration: OpenAPIRuntime.Configuration parameter. This allows you to specify a different (or custom) DateTranscoder.

By default, this is DateTranscoder.iso8601 which uses Foundation's default settings, which, as you point out, do not handle fractional seconds.

You can use .iso8601WithFractionalSeconds instead, which does handle this:

let client = Client(
    serverURL: URL(string: "http://localhost:8080/api")!,
    configuration: .init(dateTranscoder: .iso8601WithFractionalSeconds),  // <-- Specify the date transcoder here.
    transport: URLSessionTransport()
)

[laurensvm]

Thank you, this is exactly what I was looking for!