apollo-upload-client

A terminating Apollo Link for Apollo Client that allows FileList, File, Blob or ReactNativeFile instances within query or mutation variables and sends GraphQL multipart requests.

Setup

Install with npm:

npm install apollo-upload-client

Apollo Boost doesn’t allow link customization; if you are using it migrate to a manual Apollo Client setup.

Apollo Client can only have 1 “terminating” Apollo Link that sends the GraphQL requests; if one such as apollo-link-http is already setup, remove it.

Initialize the client with a terminating link using createUploadLink.

Also ensure the GraphQL server implements the GraphQL multipart request spec and that uploads are handled correctly in resolvers.

Usage

Use FileList, File, Blob or ReactNativeFile instances anywhere within query or mutation variables to send a GraphQL multipart request.

See also the example API and client.

FileList

const { useMutation } = require("@apollo/react-hooks");
const gql = require("graphql-tag");

const MUTATION = gql`
  mutation($files: [Upload!]!) {
    uploadFiles(files: $files) {
      success
    }
  }
`;

const UploadFile = () => {
  const [mutate] = useMutation(MUTATION);
  const onChange = ({ target: { validity, files } }) =>
    validity.valid && mutate({ variables: { files } });

  return <input type="file" multiple required onChange={onChange} />;
};

File

const { useMutation } = require("@apollo/react-hooks");
const gql = require("graphql-tag");

const MUTATION = gql`
  mutation($file: Upload!) {
    uploadFile(file: $file) {
      success
    }
  }
`;

const UploadFile = () => {
  const [mutate] = useMutation(MUTATION);
  const onChange = ({
    target: {
      validity,
      files: [file]
    }
  }) => validity.valid && mutate({ variables: { file } });

  return <input type="file" required onChange={onChange} />;
};

Blob

const gql = require("graphql-tag");

// Apollo Client instance.
const client = require("./client");

const file = new Blob(["Foo."], { type: "text/plain" });

// Optional, defaults to `blob`.
file.name = "bar.txt";

client.mutate({
  mutation: gql`
    mutation($file: Upload!) {
      uploadFile(file: $file) {
        success
      }
    }
  `,
  variables: { file }
});

Support

• Node.js v8.10+
• Browsers > 0.5%, not OperaMini all, not dead
• React Native

Consider polyfilling:

• Promise
• fetch
• FormData

API

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