Apollo server file download

With GraphQL, we are achieving a single paradigm of data management. Just how Apollo Client merges remote and local data. Apollo Server enables you to combine multiple previously orthogonal data sources into a single paradigm.

This post being about the specific case of file uploads and JSON data. The upload functionality follows the GraphQL multipart form requests specification. Two parts are needed to make the upload work correctly. The server and the client:. The Client: On the client, file objects are mapped into a mutation and sent to the server in a multipart request. The Server: The multipart request is received.

The server processes it and provides an upload argument to a resolver. In the resolver function, the upload promise resolves an object. The default option for enabling file uploads in Apollo Server 2. It is added automatically by Apollo Server. Apollo Server 2. Instead, the instructions below show how to integrate it yourself. You cannot do this with the "batteries-included" apollo-server library; you must use a web framework integration such as apollo-server-express instead.

This page shows out to integrate graphql-upload with Express and Fastify. To implement similar functionality with another Node. Some integrations might need to use graphql-upload 's processRequest directly. These cookies are necessary for the website to function and cannot be switched off in our systems. They are usually only set in response to actions made by you which amount to a request for services, such as setting your privacy preferences, logging in or filling in forms.

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If you do not allow these cookies, you will experience less targeted advertising. This website uses cookies to ensure you receive the best possible experience. Learn More. Then, create an index. Due to its human-readability, we recommend using schema-definition language SDL to define a GraphQL schema-- a GraphQLSchema object from graphql-js can also be specified instead of typeDefs and resolvers using the schema property:.

Finally, start the server using node index. For more details, check out the Apollo Server Getting Started guide and the fullstack tutorial. For questions, the Apollo community forum is a great place to get help. While the standalone installation above can be used without making a decision about which web framework to use, the Apollo Server integration packages are paired with specific web frameworks e.

Express, Koa, hapi. The following web frameworks have Apollo Server integrations, and each of these linked integrations has its own installation instructions and examples on its package README.

A request context is available for each request. When context is defined as a function, it will be called on each request and will receive an object containing a req property, which represents the request itself. By returning an object from the context function, it will be available as the third positional parameter of the resolvers:. Install Direnv a tool that automatically sets up environment variables in project directories or nvm. We use nvm to ensure we're running the expected version of Node and we use Direnv to install and run nvm automatically.

Are you stuck? Want to contribute? Come visit us in the Apollo community forum! Apollo builds open-source software and a graph platform to unify GraphQL across your apps and services. We help you ship faster with:. Check out the Odyssey learning platform, the perfect place to start your GraphQL journey with videos and interactive code challenges. Skip to content. Star