Repository navigation
File Upload multipart/form-data validation issue #34
Description
Good afternoon. Need your help.
I am using openapi: 3.0.0 and github.com/oapi-codegen/nethttp-middleware v1.0.2 library for data validation.
I am trying to upload a photo file to the server but I am facing the following problem.
request body has an error: failed to decode request body: path attachment: unsupported content type \"image/png\”
My swagger file looks like this
openapi: 3.0.0
/files/upload:
post:
summary: Uploads document
operationId: uploadFile
tags:
- files
requestBody:
required: true
content:
multipart/form-data:
schema:
type: object
properties:
attachment:
type: string
format: binary
required:
- attachment
encoding:
attachment:
contentType: image/png, image/jpeg
responses:
"200":
content:
application/json:
schema:
$ref: '#/components/schemas/FileUploadResponse'
I suspect the error occurs github.com/getkin/kin-openapi/openapi3filter/req_resp_decoder.go on line 1462.
we send image contentType = image/png to contentType = multipart/form-data for validation and get an error.
var value any
if _, value, err = decodeBody(part, http.Header(part.Header), valueSchema, subEncFn); err != nil {
if v, ok := err.(*ParseError); ok {
return nil, &ParseError{path: []any{name}, Cause: v}
}
return nil, fmt.Errorf(“part %s: %w”, name, err)
}
at this point we expect contentType = multipart/form-data but get another one contentType = image/png and return with an error.
decoder, ok := bodyDecoders[mediaType]
if !ok {
return "", nil, &ParseError{
Kind: KindUnsupportedFormat,
Reason: fmt.Sprintf("%s %q", prefixUnsupportedCT, mediaType),
}
}
to solve this problem you need to put inside bodyDecoders not only contentType=multipart/form-data but also all contentType and encoding lists (image/png, image/jpeg and so on) in bodyDecoders.
Activity