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add openapi 3.1 support #5372

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@chrisradek chrisradek commented Dec 13, 2024

This PR adds support for Open API 3.1 in the @typespec/openapi3 package.

The changes in this PR includes:
#4946 - adds output-spec-versions emitter option
#5035 - adds initial open api 3.1 schema emitter
#5245 - add support for tuples
#5246 - add support for enums backed by multiple types
#5310 - playground support for array of constants emitter options
#5407 - add support for json-schema decorators
#5549 - add support for binary types in Open API 3.1

chrisradek and others added 10 commits November 6, 2024 09:48
)

This PR adds a new `@typespec/openapi3` emitter option to support
specifying which Open API 3.x specs to output.

Currently marked as `@internal` since currently only 1 version is
actually supported. Once `v3.1` is supported we can remove the
`@internal` annotation.

---------

Co-authored-by: Christopher Radek <[email protected]>
Related to #5009 and #5010

This PR starts the work of getting an Open API 3.1 emitter in the
`@typespec/openapi3` package.

There are a few changes introduced in this PR:
1. Added the `OpenAPIDocument3_1` and related types. The biggest change
here is updating the Open API schema to be based on Json Schema 2020-12.
The Json Schema types don't currently exist in `@typespec/json-schema`
so I added them to `@typespec/openapi3` for now while iterating. Can
move to `@typespec/json-schema` now or later if we want.
2. Created the OpenAPISchemaEmitter3_1 class to target Open API 3.1
schemas. Currently completely standalone from Json Schema and Open API
3.0 schema emitters.
3. Updated nearly all tests to now run against both Open API 3.x
versions. Intentionally left out the enum tests and schema examples
since those will be updated shortly and be different between the two
versions.
4. Added support for `type: "null"` in the 3.1 schema emitter. I
squeezed this change in because the changes involved were actually
really small, and this way TypeScript was happy we were emitting 3.1
schemas that matched the defined interface (no `nullable`). I copied the
behavior that the Json Schema emitter uses for handling nulls.
5. Updated `exclusiveMinimum/Maximum` to be a number value instead of a
boolean to match the Open API 3.1 spec.

Note to reviewers: Hide whitespace - otherwise the test changes will
look monstrous.

---------

Co-authored-by: Christopher Radek <[email protected]>
Implements #5013

Co-authored-by: Christopher Radek <[email protected]>
Implements #5011 
The only place I found this made sense to emit a schema type as a list
currently is with enums as mentioned in the linked issue.

Co-authored-by: Christopher Radek <[email protected]>
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azure-sdk commented Dec 13, 2024

All changed packages have been documented.

  • @typespec/openapi3
  • @typespec/playground
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@typespec/openapi3 - feature ✏️

Adds support for @typespec/json-schema decorators with Open API 3.0 and 3.1 emitters.

@typespec/openapi3 - feature ✏️

Adds support for emitting Open API 3.1 models using the openapi-versions emitter configuration option.,> Open API 3.0 is emitted by default.

@typespec/playground - feature ✏️

Add support for displaying array-based emitter options

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azure-sdk commented Dec 13, 2024

You can try these changes here

🛝 Playground 🌐 Website 📚 Next docs 🛝 VSCode Extension

@chrisradek chrisradek marked this pull request as ready for review December 16, 2024 17:48
chrisradek and others added 2 commits January 2, 2025 12:56
This PR updates the `@typespec/openapi3` emitter to read state from the
`@typespec/json-schema` decorators.

---------

Co-authored-by: Christopher Radek <[email protected]>
This PR updates the playground to handle array emitter options.

Currently this mainly supports options that are an array of enums - such
as the new openapi3 versions option.

If an option accepts an array of non-enums, then currently it will
display a single input field, effectively restricting usage to a single
element. As new array options come up we can decide how we want to
display them (e.g. show a '+' sign and create a new element?)

Screenshot of the `Openapi Versions` option showing both choices as
selectable:

![image](https://github.com/user-attachments/assets/955d2ea0-2ec0-435c-8805-7efb5f50b5c4)

Co-authored-by: Christopher Radek <[email protected]>
Fixes #5507 

This PR updates the Open API 3.1 schema to support binary types.

The linked issue includes more details on the required changes (and Open
API 3.1 spec) but here's a quick summary:

## Binary types

Open API supports 2 types of binary data: raw (unencoded) binary, and
encoded binary.

In Open API 3.0, binary data is described using the `string` type with
`format: binary` indicating raw binary data, and `format: byte`
indicating encoded binary data (defaulted to base64 encoding).

In Open API 3.1, binary data is represented with an empty schema - `{}`
for raw binary data, and uses the `string` type with `contentEncoding:
base64` to represent encoded binary data (note that the actual value of
contentEncoding can be anything).
Additionally, `contentMediaType` can be set on both raw and encoded
binary data schemas, though this value will be ignored if `encoding`
fields are present (common for multipart) or if it matches the
requestBody content type.

This PR preserves the behavior where `@encode` can be used to indicate
the content encoding. For Open API 3.0, it updates the encoded binary
schema's `format` field. In Open API 3.1, it will update the encoded
binary schema's `contentEncoding` field.

---------

Co-authored-by: Christopher Radek <[email protected]>
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4 participants