add hw2

node_modules/@puppeteer/browsers/lib/esm/httpUtil.js

@@ -0,0 +1,124 @@
+/**
+ * @license
+ * Copyright 2023 Google Inc.
+ * SPDX-License-Identifier: Apache-2.0
+ */
+import { createWriteStream } from 'fs';
+import * as http from 'http';
+import * as https from 'https';
+import { URL, urlToHttpOptions } from 'url';
+import { ProxyAgent } from 'proxy-agent';
+export function headHttpRequest(url) {
+    return new Promise(resolve => {
+        const request = httpRequest(url, 'HEAD', response => {
+            // consume response data free node process
+            response.resume();
+            resolve(response.statusCode === 200);
+        }, false);
+        request.on('error', () => {
+            resolve(false);
+        });
+    });
+}
+export function httpRequest(url, method, response, keepAlive = true) {
+    const options = {
+        protocol: url.protocol,
+        hostname: url.hostname,
+        port: url.port,
+        path: url.pathname + url.search,
+        method,
+        headers: keepAlive ? { Connection: 'keep-alive' } : undefined,
+        auth: urlToHttpOptions(url).auth,
+        agent: new ProxyAgent(),
+    };
+    const requestCallback = (res) => {
+        if (res.statusCode &&
+            res.statusCode >= 300 &&
+            res.statusCode < 400 &&
+            res.headers.location) {
+            httpRequest(new URL(res.headers.location), method, response);
+            // consume response data to free up memory
+            // And prevents the connection from being kept alive
+            res.resume();
+        }
+        else {
+            response(res);
+        }
+    };
+    const request = options.protocol === 'https:'
+        ? https.request(options, requestCallback)
+        : http.request(options, requestCallback);
+    request.end();
+    return request;
+}
+/**
+ * @internal
+ */
+export function downloadFile(url, destinationPath, progressCallback) {
+    return new Promise((resolve, reject) => {
+        let downloadedBytes = 0;
+        let totalBytes = 0;
+        function onData(chunk) {
+            downloadedBytes += chunk.length;
+            progressCallback(downloadedBytes, totalBytes);
+        }
+        const request = httpRequest(url, 'GET', response => {
+            if (response.statusCode !== 200) {
+                const error = new Error(`Download failed: server returned code ${response.statusCode}. URL: ${url}`);
+                // consume response data to free up memory
+                response.resume();
+                reject(error);
+                return;
+            }
+            const file = createWriteStream(destinationPath);
+            file.on('finish', () => {
+                return resolve();
+            });
+            file.on('error', error => {
+                return reject(error);
+            });
+            response.pipe(file);
+            totalBytes = parseInt(response.headers['content-length'], 10);
+            if (progressCallback) {
+                response.on('data', onData);
+            }
+        });
+        request.on('error', error => {
+            return reject(error);
+        });
+    });
+}
+export async function getJSON(url) {
+    const text = await getText(url);
+    try {
+        return JSON.parse(text);
+    }
+    catch {
+        throw new Error('Could not parse JSON from ' + url.toString());
+    }
+}
+export function getText(url) {
+    return new Promise((resolve, reject) => {
+        const request = httpRequest(url, 'GET', response => {
+            let data = '';
+            if (response.statusCode && response.statusCode >= 400) {
+                return reject(new Error(`Got status code ${response.statusCode}`));
+            }
+            response.on('data', chunk => {
+                data += chunk;
+            });
+            response.on('end', () => {
+                try {
+                    return resolve(String(data));
+                }
+                catch {
+                    return reject(new Error('Chrome version not found'));
+                }
+            });
+        }, false);
+        request.on('error', err => {
+            reject(err);
+        });
+    });
+}
+//# sourceMappingURL=httpUtil.js.map