refactor cache key calculation to have more space for dealing with different types of bodies
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parent
2e79048563
commit
b94babec12
33
index.js
33
index.js
@ -1,5 +1,6 @@
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const fetch = require('node-fetch');
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const fetch = require('node-fetch');
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const fs = require('fs');
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const fs = require('fs');
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const { URLSearchParams } = require('url');
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const crypto = require('crypto');
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const crypto = require('crypto');
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const path = require('path');
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const path = require('path');
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@ -9,6 +10,29 @@ function md5(str) {
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return crypto.createHash('md5').update(str).digest('hex');
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return crypto.createHash('md5').update(str).digest('hex');
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}
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}
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function getBodyCacheKeyJson(body) {
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if (typeof body === 'string') {
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return body;
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} if (body instanceof URLSearchParams) {
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return body.toString();
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}
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return body;
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}
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function getCacheKey(requestArguments) {
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const resource = requestArguments[0];
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const init = requestArguments[1] || {};
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const resourceCacheKeyJson = typeof resource === 'string' ? { url: resource } : { ...resource };
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const initCacheKeyJson = { ...init };
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resourceCacheKeyJson.body = getBodyCacheKeyJson(resourceCacheKeyJson.body);
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initCacheKeyJson.body = getBodyCacheKeyJson(initCacheKeyJson.body);
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return md5(JSON.stringify([resourceCacheKeyJson, initCacheKeyJson]));
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}
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async function createRawResponse(fetchRes) {
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async function createRawResponse(fetchRes) {
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const buffer = await fetchRes.buffer();
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const buffer = await fetchRes.buffer();
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@ -28,13 +52,8 @@ async function createRawResponse(fetchRes) {
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}
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}
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async function getResponse(cacheDirPath, requestArguments) {
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async function getResponse(cacheDirPath, requestArguments) {
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const [url, requestInit, ...rest] = requestArguments;
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const cacheKey = getCacheKey(requestArguments);
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const requestParams = requestInit.body
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const cachedFilePath = path.join(cacheDirPath, `${cacheKey}.json`);
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? ({ ...requestInit, body: typeof requestInit.body === 'object' ? requestInit.body.toString() : requestInit.body })
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: requestInit;
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const cacheHash = md5(JSON.stringify([url, requestParams, ...rest]));
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const cachedFilePath = path.join(cacheDirPath, `${cacheHash}.json`);
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try {
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try {
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const rawResponse = JSON.parse(await fs.promises.readFile(cachedFilePath));
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const rawResponse = JSON.parse(await fs.promises.readFile(cachedFilePath));
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