feat: server middleware

[mcansh]

closes #514

• chore: use latest versions of react-router packages
• feat: update types for server file middleware

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[Copilot]

Pull Request Overview

This PR updates and refactors middleware integration and dependency handling for the remix-fastify package and its examples. Key changes include removing the middleware bundle entry and associated files, updating react-router types and context handling, and revising dependency updates in the pnpmfile.

• Removed middleware entry and related files from the remix-fastify package.
• Updated type definitions and context management for react-router integration.
• Enhanced dependency resolution in .pnpmfile.cjs for examples using remix-related packages.

Reviewed Changes

Copilot reviewed 16 out of 23 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
packages/remix-fastify/tsup.config.ts	Removed middleware entry from build and updated re-export paths.
packages/remix-fastify/src/shared.ts	Removed an unused import from react-router.
packages/remix-fastify/src/react-router.ts	Updated type definitions for the load context with conditional types.
packages/remix-fastify/src/middleware.ts	Removed middleware file as it is no longer used.
packages/remix-fastify/middleware.{js, d.cts, cjs}	Removed legacy middleware export files.
examples/react-router/vite.config.ts	Simplified plugin configuration for react-router usage.
examples/react-router/server.ts	Updated plugin registration with a getLoadContext option.
examples/react-router/react-router.config.ts	Added configuration for enabling unstable middleware.
examples/react-router/context.ts	Added a new context creation file with default adapter context.
examples/react-router/app/root.tsx	Updated context usage and middleware configuration in the app root.
.pnpmfile.cjs	Revised dependency resolution to update remix-related dependencies.

Files not reviewed (7)

• examples/basic/package.json: Language not supported
• examples/basic/tsconfig.json: Language not supported
• examples/playground/package.json: Language not supported
• examples/react-router/package.json: Language not supported
• examples/react-router/tsconfig.json: Language not supported
• examples/vite/package.json: Language not supported
• package.json: Language not supported

Comments suppressed due to low confidence (1)

examples/react-router/context.ts:8

• [nitpick] The default value 'lol default value' might be too informal for production. Consider updating it to a more descriptive and professional string.

session: "lol default value",

[pkg-pr-new]

More templates

• example-basic-template
• example-playground
• example-react-router-template
• example-vite-remix

npm i https://pkg.pr.new/@mcansh/remix-fastify@515

commit: 45e753a

[jpinn97]

Hi, thanks for getting onto this quickly. Had no issue with the react-router side of it, but I've observed no effect from getLoadContext under the current implementation and double checking against the 7.3 patch notes too. I have been able to pass other things through such as Symbols, and retrieve them, so this works.

// server.ts
export const CONTEXT_KEY = Symbol.for('adapter-context-key');

function getAdapterContext(request: FastifyRequest) {
  return {
    session: "test"
  };
}

// @ts-expect-error
await app.register(reactRouterFastify, {
  getLoadContext(request): unstable_InitialContext {
    let map = new Map();
    map.set(adapterContext, getAdapterContext(request));
    
    map.set(CONTEXT_KEY, getAdapterContext(request));
    
    console.log("Setting context:", map);
    return map;
  },
});

// root.tsx
export function loader({ context }: Route.LoaderArgs) {
  // Get the context using the Symbol approach
  const symbolContextValue = context.get(CONTEXT_KEY);
  
  console.log('Symbol context get:', { symbolContextValue });
  
  return null;
}

export const unstable_middleware: unstable_MiddlewareFunction[] = [
  async ({ context }) => {
    // Get the context using the Symbol approach in middleware too
    const symbolContextValue = context.get(CONTEXT_KEY);
    
    console.log('Middleware symbol context:', { symbolContextValue });
  },
];

Obviously this isn't the context, or the correct implemtation, but essentially to prove it passes through.
I cannot set the map however, context.get(adapterContext continues to return the map with default value, so not exactly sure what happening, either not updating the context or the context is being overwrote in rr?

[mcansh]

Hi, thanks for getting onto this quickly. Had no issue with the react-router side of it, but I've observed no effect from getLoadContext under the current implementation and double checking against the 7.3 patch notes too. I have been able to pass other things through such as Symbols, and retrieve them, so this works.

// server.ts

export const CONTEXT_KEY = Symbol.for('adapter-context-key');



function getAdapterContext(request: FastifyRequest) {

  return {

    session: "test"

  };

}



// @ts-expect-error

await app.register(reactRouterFastify, {

  getLoadContext(request): unstable_InitialContext {

    let map = new Map();

    map.set(adapterContext, getAdapterContext(request));

    

    map.set(CONTEXT_KEY, getAdapterContext(request));

    

    console.log("Setting context:", map);

    return map;

  },

});



// root.tsx

export function loader({ context }: Route.LoaderArgs) {

  // Get the context using the Symbol approach

  const symbolContextValue = context.get(CONTEXT_KEY);

  

  console.log('Symbol context get:', { symbolContextValue });

  

  return null;

}



export const unstable_middleware: unstable_MiddlewareFunction[] = [

  async ({ context }) => {

    // Get the context using the Symbol approach in middleware too

    const symbolContextValue = context.get(CONTEXT_KEY);

    

    console.log('Middleware symbol context:', { symbolContextValue });

  },

];

Obviously this isn't the context, or the correct implemtation, but essentially to prove it passes through.

I cannot set the map however, context.get(adapterContext continues to return the map with default value, so not exactly sure what happening, either not updating the context or the context is being overwrote in rr?

do you have the required lines for typescript in your react router config? can you provide a minimal reproduction repo just to be safe?

[jpinn97]

I've tried this PR as is. Cloned the PR bot template, so its as is, are you saying it works for you?

[mcansh]

I've tried this PR as is. Cloned the PR bot template, so its as is, are you saying it works for you?

yep, aside from the one // @ts-expect-error i have in server.ts when registering the plugin

[jpinn97]

Well I don't know then, cloned your monorepo fresh. My expectation is this would print out abc for the first loader get context, not the default value?

[mcansh]

i'll look into some more this evening. here im required to add an initial value, but in an express app im not

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