稿类型的定义功能,包异功能

0

的问题

我有一个功能需要采取一种任意的同步功能和返回的结果的等待,同步功能,但包装在一个尝试/抓住其中增加了一些额外的逻辑。 看到 ts游乐场.

const with401Redirection =
    <T extends (...args: any[]) => Promise<any>>(
        call: T
    ): ((...args: Parameters<T>) => ReturnType<T>) =>
    // @ts-expect-error
    async (...args: Parameters<T>): ReturnType<T> => {
        try {
            return await call(...args);
        } catch (error) {
            if ((error as any).httpStatus === 401) {
                // do some stuff here
            }

            throw error;
        }
    };

interface User {
    id: string;
    name: string;
}

interface ItemPayload {
    field1: string;
    field2: string;
}

interface ItemResponse {
    id: string;
    field1: string;
    field2: string;
}

const client = {
    get<ResponseType>(url: string): Promise<ResponseType> {
        // logic to hit server and return result here
        return '' as any;
    },
    post<ResponseType>(url: string, body: Record<string, any>): Promise<ResponseType> {
        // logic to hit server and return result here
        return '' as any;
    }
};

const getUser = with401Redirection(() =>
    client.get<User>('url_1')
);

const saveItem = with401Redirection((body: ItemPayload) =>
    client.post<ItemResponse>('url_2', body)
);

我觉得像 // @ts-expect-errorwith401Redirection 不应该是必要的--我如何可以将其删除,或通常清理打字 with401Redirection 功能? 请记住我想要维护的事实, getUsersaveItem 功能有它们的类型自动地推断出我。

1

最好的答案

2

试试这个:

TS游乐场链接

type Awaited<T> = T extends PromiseLike<infer U> ? Awaited<U> : T;
type AsyncFn = (...args: any[]) => Promise<any>;

function with401Redirection <T extends AsyncFn>(call: T): (...args: Parameters<T>) => Promise<Awaited<ReturnType<T>>> {
    return async (...args: Parameters<T>) => {
        try {
            return await call(...args);
        }
        catch (exception) {
            if (typeof exception === 'object' && (exception as any)?.httpStatus === 401) {
                // do some stuff here
            }
            throw exception;
        }
    };
}

阅读有关的实际的、即将到来 Awaited 类型在TS4.5:

https://devblogs.microsoft.com/typescript/announcing-typescript-4-5-beta/#the-awaited-type-and-promise-improvements

2021-11-13 00:21:15

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