ts-rest-client's Introduction

Typed Rest Client

概要

型システムを利用し、漏れがないようにレスポンスの処理が可能なRest API Client。仕様書に定義されているエラーレスポンスについては個別にハンドリング可能。

使用方法

    import { 
        Router,
        SuccessResponse,
        ExpectedErrorResponse,
        HttpCodes,
        RESTClient,
        UnexpectedErrorResponse,
        isSucess,
        isExpectedError,
        isUnexpectedError
    } from '../lib/RESTClient';

    interface IResponse {
        // response JSON schema here ...
    }
    const StatusCodes = [
            HttpCodes.NotFound,
            HttpCodes.InternalServerError,
    ] as const;
    type StatusCodesTuple = typeof StatusCodes;
    type TStatusCodes = StatusCodesTuple[number];

    type TRouter = Router<IResponse, TStatusCodes>;
    type TResponse = SuccessResponse<IResponse>;

    const client = RestClient("client name", "https://your/api/url_base")
    
    // In your async func
    const router: TRouter = await client.get<IResponse, TStatusCodes>("/your/api/path", StatusCodes);
    const route = router.routing({
        success: (response: TResponse) => {
            // post process here
        },
        expectedError: {
            404: (response: TExpectedErrorResponse) => {
                // error handling here ...
            },
            500: (response: TExpectedErrorResponse) => {
                // error handling here ...
            }
        },
        unexpectedError: (response: UnexpectedErrorResponse) => {
            // error handling here ...
        }
    });

    if (isSucess(route)) {
        route.func(route.response);
    }else if (isExpectedError(route)) {
        route.func(route.response);
    }else if (isUnexpectedError(route)) {
        route.func(route.response);
    } else {
        throw Error("Invalid route")
    };

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