@canlooks/ajax/dist/esm/ajaxInstance.js

A private tool

import { core } from './core';
import { mergeConfig } from './util';
export const ajax = createInstance();
function createInstance(parentConfig = {}, beforeRequest = new Set(), beforeResponse = new Set()) {
    const ajaxInstance = (async (config) => {
        config = await enforceRequestInterceptors(mergeConfig(parentConfig, config));
        let res;
        try {
            res = await core(config);
        }
        catch (e) {
            return await enforceResponseInterceptors(null, e, config, false);
        }
        const returnValue = await enforceResponseInterceptors(res, null, config, true);
        return typeof returnValue === 'undefined' ? res : returnValue;
    });
    ajaxInstance.config = parentConfig;
    /**
     * ------------------------------------------------------------------
     * interceptors
     */
    ajaxInstance.beforeRequest = beforeRequest;
    ajaxInstance.beforeResponse = beforeResponse;
    /**
     * ------------------------------------------------------------------
     * sub instance
     */
    ajaxInstance.extend = (config) => createInstance(config
        ? mergeConfig(parentConfig, config)
        : parentConfig, new Set(beforeRequest), new Set(beforeResponse));
    /**
     * ------------------------------------------------------------------
     * alias
     */
    const aliasWithoutBody = (method) => {
        return (url, config) => ajaxInstance({ ...config, method, url });
    };
    ajaxInstance.get = aliasWithoutBody('get');
    ajaxInstance.delete = aliasWithoutBody('delete');
    ajaxInstance.head = aliasWithoutBody('head');
    ajaxInstance.options = aliasWithoutBody('options');
    const aliasWithBody = (method) => {
        return (url, body, config) => ajaxInstance({ ...config, method, url, body });
    };
    ajaxInstance.post = aliasWithBody('post');
    ajaxInstance.put = aliasWithBody('put');
    ajaxInstance.patch = aliasWithBody('patch');
    return ajaxInstance;
    /**
     * 执行请求拦截器
     * @param config
     */
    async function enforceRequestInterceptors(config) {
        const set = new Set(beforeRequest);
        config.onRequest && set.add(config.onRequest);
        for (const interceptor of beforeRequest) {
            const newConfig = await interceptor(config);
            if (typeof newConfig === 'object' && newConfig) {
                config = newConfig;
            }
        }
        return config;
    }
    /**
     * 执行响应拦截器
     * @param response
     * @param error
     * @param config
     * @param isFinalSuccess
     */
    async function enforceResponseInterceptors(response, error, config, isFinalSuccess) {
        const set = new Set(beforeResponse);
        config.onResponse && set.add(config.onResponse);
        for (const interceptor of beforeResponse) {
            try {
                const returnValue = await interceptor(response, error, config);
                if (typeof returnValue !== 'undefined') {
                    response = returnValue;
                }
                error = null;
                isFinalSuccess = true;
            }
            catch (e) {
                response = null;
                error = e;
                isFinalSuccess = false;
            }
        }
        if (isFinalSuccess) {
            return response;
        }
        throw error;
    }
}