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const { exampleApiDocResponse } = require('./apidocParse');
const { memo } = require('./global');
/**
* Parse custom mock settings.
*
* @param {object} params
* @param {Array} params.settings
* @returns {{forceStatus: (number|undefined), delay: (number|undefined), reload: (number|undefined),
* response: (number|undefined)}}
*/
const getCustomMockSettings = memo(({ settings = [] } = {}) => {
const updatedSettings = {
delay: undefined,
forceStatus: undefined,
response: undefined,
reload: undefined
};
settings?.forEach(val => {
const [key = '', value] = Object.entries(val)?.[0] || [];
switch (key.toLowerCase()) {
case 'delay':
case 'delayresponse':
updatedSettings.delay = Number.parseInt(value, 10);
if (Number.isNaN(updatedSettings.delay)) {
updatedSettings.delay = 1000;
}
break;
case 'force':
case 'forcestatus':
case 'forcedstatus':
updatedSettings.forceStatus = Number.parseInt(value, 10);
if (Number.isNaN(updatedSettings.forceStatus)) {
updatedSettings.forceStatus = 200;
}
break;
case 'response':
updatedSettings.response = 'response';
break;
case 'random':
case 'randomresponse':
updatedSettings.response = 'response';
updatedSettings.reload = true;
break;
case 'randomsuccess':
updatedSettings.response = 'success';
updatedSettings.reload = true;
break;
case 'randomerror':
updatedSettings.response = 'error';
updatedSettings.reload = true;
break;
}
});
return updatedSettings;
});
/**
* Return passed mock mime type and parsed content
*
* @param {object} params
* @param {string} params.content
* @param {string} params.type
* @returns {{content: string, contentType: string}}
*/
const getContentAndType = memo(({ content = '', type: contentType } = {}) => {
let updatedContent = content;
let updatedType;
if (/^HTTP/.test(content)) {
updatedContent = content.split(/\n/).slice(1).join('\n');
}
/**
* Ignore content types that already contain a `/`
*/
if (contentType?.split('/').length > 1) {
return {
content: updatedContent,
contentType
};
}
switch (contentType) {
case 'zip':
case 'gzip':
case 'json':
updatedType = `application/${contentType}`;
break;
case 'xml':
case 'html':
case 'csv':
case 'css':
updatedType = `text/${contentType}`;
break;
case 'svg':
updatedType = 'image/svg+xml';
break;
case 'txt':
default:
updatedType = 'text/plain';
break;
}
return {
content: updatedContent,
contentType: updatedType
};
});
/**
* Aggregate possible responses, return an example based on available configuration.
*
* @param {object} params
* @param {object} params.mockSettings
* @param {Array} params.successExamples
* @param {Array} params.errorExamples
* @param {string} params.type
* @param {string} params.url
* @returns {{authExample: {content: *, type: *}, example: {content: *, type: *}}}
*/
const getExampleResponse = async ({ mockSettings, successExamples = [], errorExamples = [], type, url } = {}) =>
exampleApiDocResponse({ mockSettings, successExamples, errorExamples, type, url });
/**
* Build API response
*
* @param {Array} apiJson
* @returns {{app:Array, routesLoaded: boolean}}
*/
const buildResponse = (apiJson = []) => {
const appResponses = [];
let routesLoaded = 0;
apiJson.forEach(({ error = {}, header, success = {}, type, url, mock } = {}) => {
try {
const mockSettings = getCustomMockSettings({ settings: mock?.settings, url });
const memoGetExampleResponse = memo(getExampleResponse, {
cacheLimit: mockSettings?.reload ? 0 : 25
});
appResponses.push({
type,
url,
callback: async (request, response) => {
/**
* Leverage memo caching using isParams, isQuery.
*/
const { example: updatedExample, authExample: updatedAuthExample } = await memoGetExampleResponse({
mockSettings,
successExamples: success.examples,
errorExamples: error.examples,
type,
url,
isParams: request?.params,
isQuery: request?.query
});
const httpStatus = updatedExample?.status > 0 && updatedExample?.status < 600 ? updatedExample.status : 500;
const responseObj = getContentAndType({ ...updatedExample });
response.set('Cache-Control', 'no-cache');
Iif (httpStatus < 500 && Array.isArray(header?.fields?.Header)) {
let isAuthorized = true;
header?.fields?.Header?.forEach(headerValue => {
if (!headerValue.optional && headerValue.field && /authorization/i.test(headerValue.field)) {
const authorization = request.get('authorization');
if (!authorization) {
const authResponseObj = getContentAndType({ ...updatedAuthExample });
const forcedStatus = 401;
response.append('WWW-Authenticate', 'Spoof response');
response.status(forcedStatus);
response.set('Content-Type', authResponseObj.contentType);
if (mockSettings?.delay > 0) {
logger.info(`waiting\t:${forcedStatus} :${authResponseObj.contentType} :${url}`);
}
setTimeout(() => {
logger.info(`response\t:${forcedStatus} :${authResponseObj.contentType} :${url}`);
response.end(authResponseObj.content || 'Authorization Required');
}, mockSettings?.delay || 0);
isAuthorized = false;
}
}
});
if (isAuthorized === false) {
return;
}
}
response.status(httpStatus);
response.set('Content-Type', responseObj.contentType);
Iif (mockSettings?.delay > 0) {
logger.info(`waiting\t:${httpStatus} :${responseObj.contentType} :${url}`);
}
setTimeout(() => {
logger.info(`response\t:${httpStatus} :${responseObj.contentType} :${url}`);
response.send(responseObj.content);
}, mockSettings?.delay || 0);
}
});
routesLoaded += 1;
} catch (e) {
logger.warn(`response\t:${e.message}`);
}
});
return {
appResponses,
routesLoaded: routesLoaded > 0
};
};
/**
* Open request headers up. Parse OPTIONS or continue
*
* @param {object} request
* @param {object} response
* @param {Function} next
*/
const buildRequestHeaders = (request, response, next) => {
const hasOrigin = request.headers.origin != null;
response.set('Access-Control-Allow-Origin', hasOrigin ? request.headers.origin : '*');
response.set('Access-Control-Allow-Credentials', !hasOrigin);
response.set('Access-Control-Allow-Methods', 'GET, PUT, POST, DELETE, HEAD, OPTIONS, PATCH');
const requestHeaders = request.headers['access-control-request-headers'];
if (requestHeaders !== null && requestHeaders !== undefined) {
response.set('Access-Control-Allow-Headers', requestHeaders);
}
if (request.method === 'OPTIONS') {
response.end();
} else {
next();
}
};
module.exports = { buildResponse, buildRequestHeaders, getContentAndType, getCustomMockSettings, getExampleResponse };
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