multipart/form-data requests broken in version 0.243.1 (returning `Unsupported content type`)

[trannon]

Describe the Bug

I recently updated from Strawberry version 0.237.2 to 0.243.1. Under the prior version, I was able to submit queries to my graphql endpoints using a multipart/form-data POST like the following:

curl --location '0.0.0.0:8000/graphql' \
--form 'operations="{\"query\":\"{books{title, author}}\"}"'

However, under the newer version I started receiving a "Unsupported content type" 400 error with the same request.

This format is needed to send files and more complicated request use cases (with variables).

System Information

• Operating system: MacOS 14.6.1
• Strawberry version (if applicable): 0.243.1

Steps to reproduce

This can be reproduced by creating a simple strawberry endpoint by following the "Getting Started" docs to create a schema.py file like this:

import typing
import strawberry

@strawberry.type
class Book:
    title: str
    author: str

@strawberry.type
class Query:
    books: typing.List[Book]

def get_books():
    return [
        Book(
            title="The Great Gatsby",
            author="F. Scott Fitzgerald",
        ),
    ]

@strawberry.type
class Query:
    books: typing.List[Book] = strawberry.field(resolver=get_books)

schema = strawberry.Schema(query=Query)

Start the server by running strawberry server schema.

Under both versions (0.237.2 and 0.243.1), the following curl request WORKS:

curl --location '0.0.0.0:8000/graphql' \
--header 'Content-Type: application/json' \
--data '{"query": "{books{title, author}}"}'

The following request format works under the older version 0.237.2, but does NOT work under the newer version 0.243.1:

curl --location '0.0.0.0:8000/graphql' \
--form 'operations="{\"query\":\"{books{title, author}}\"}"'

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[patrick91]

hi @trannon, sorry about that, but have disabled multipart uploads by default, you can check the breaking change here: https://strawberry.rocks/docs/breaking-changes/0.243.0

[trannon]

I see, thank you for the quick response.

In my case, I am using the FastAPI integration and therefore I was able to restore the prior behavior by setting the multipart_uploads_enabled flag as indicated in the new integration docs:

schema = strawberry.Schema(...)
graphql_app = GraphQLRouter(schema, multipart_uploads_enabled=True)
app = FastAPI()
app.include_router(graphql_app, prefix="/gql")

This is for an internal tool and therefore the security implications are not a factor.

[patrick91]

@trannon thanks for getting back to us! Glad it's all good now 😊