请求上下文

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createContext() 函数会在每个请求中被调用，其执行结果将传递给所有解析器。您可以通过此机制将上下文数据传递给下游的解析器。

示例代码

server/context.ts
ts
import * as trpc from '@trpc/server';
import * as trpcNext from '@trpc/server/adapters/next';
// The app's context - is generated for each incoming request
export async function createContext(opts?: trpcNext.CreateNextContextOptions) {
  // Create your context based on the request object
  // Will be available as `ctx` in all your resolvers
  // This is just an example of something you'd might want to do in your ctx fn
  async function getUserFromHeader() {
    if (opts?.req.headers.authorization) {
      // const user = await decodeJwtToken(req.headers.authorization.split(' ')[1])
      // return user;
    }
    return null;
  }
  const user = await getUserFromHeader();
  return {
    user,
  };
}
type Context = trpc.inferAsyncReturnType<typeof createContext>;
// Helper function to create a router with your app's context
export function createRouter() {
  return trpc.router<Context>();
}

server/context.ts
ts
import * as trpc from '@trpc/server';
import * as trpcNext from '@trpc/server/adapters/next';
// The app's context - is generated for each incoming request
export async function createContext(opts?: trpcNext.CreateNextContextOptions) {
  // Create your context based on the request object
  // Will be available as `ctx` in all your resolvers
  // This is just an example of something you'd might want to do in your ctx fn
  async function getUserFromHeader() {
    if (opts?.req.headers.authorization) {
      // const user = await decodeJwtToken(req.headers.authorization.split(' ')[1])
      // return user;
    }
    return null;
  }
  const user = await getUserFromHeader();
  return {
    user,
  };
}
type Context = trpc.inferAsyncReturnType<typeof createContext>;
// Helper function to create a router with your app's context
export function createRouter() {
  return trpc.router<Context>();
}