Parsing a struct in Multipart Form Data panics #897
Description
I've seen that parsing arbitrary types has been implemented just recently.
curl http://localhost:9999/foo \
--form 'name=josh' \
--form 'content=@abc.pdf'Parses fine into:
type Input struct {
RawBody huma.MultipartFormFiles[struct {
Name string `form:"name"`
Content huma.FormFile `form:"content"`
}]
}But imagine a scenario where I need to upload a file (possibly binary) to the server. And alongside this file, I want to send some additional metadata as JSON. Like this:
curl http://localhost:9999/foo \
--form 'metadata={\"client\":\"curl\", \"user_id\":1}' \
--form 'content=@abc.pdf'Then, I would try to define the Input struct as follows:
type Input struct {
RawBody huma.MultipartFormFiles[struct {
Metadata Metadata `form:"metadata" contentType:"application/json"`
Content huma.FormFile `form:"content"`
}]
}
type Metadata struct {
Client string `json:"client"`
UserID int `json:"user_id"`
}With that, Huma even generates the right OpenAPI spec:
...
Metadata:
additionalProperties: false
properties:
client:
type: string
user_id:
format: int64
type: integer
required:
- client
- user_id
type: object
...
requestBody:
content:
multipart/form-data:
encoding:
content:
contentType: application/octet-stream
metadata:
contentType: text/plain
schema:
properties:
content:
contentEncoding: binary
contentMediaType: application/octet-stream
format: binary
type: string
metadata:
$ref: "#/components/schemas/Metadata"
type: object
...But sadly, the parsing then fails when a request is fired.
http: panic serving [::1]:50273: unsupported param type Metadata