fix(core): update

ts/smartnetwork.classes.cloudflarespeed.ts

@@ -0,0 +1,188 @@
+import * as plugins from './smartnetwork.plugins';
+import * as stats from './helpers/stats';
+
+export class CloudflareSpeed {
+  constructor() {}
+
+  public async speedTest() {
+    const latency = await this.measureLatency();
+    
+    const serverLocations = await this.fetchServerLocations();
+    const cgiData = await this.fetchCfCdnCgiTrace();
+
+    return {
+      ...latency,
+      ip: cgiData.ip,
+      serverLocation: {
+        shortId: cgiData.colo,
+        name: serverLocations[cgiData.colo],
+        availableLocations: serverLocations, 
+      }
+    };
+  }
+
+  public async measureLatency() {
+    const measurements: number[] = [];
+
+    for (let i = 0; i < 20; i += 1) {
+      await this.download(1000).then(
+        (response) => {
+          // TTFB - Server processing time
+          measurements.push(response[4] - response[0] - response[6]);
+        },
+        (error) => {
+          console.log(`Error: ${error}`);
+        }
+      );
+    }
+
+    return {
+      maxTime: Math.max(...measurements),
+      minTime: Math.min(...measurements),
+      averageTime: stats.average(measurements),
+      medianTime: stats.median(measurements),
+      jitter: stats.jitter(measurements),
+    }
+      
+    ;
+  }
+
+  public async fetchServerLocations(): Promise<{[key: string]: string}> {
+    const res = JSON.parse(await this.get('speed.cloudflare.com', '/locations'));
+
+    return res.reduce((data, { iata, city }) => {
+      // Bypass prettier "no-assign-param" rules
+      const data1 = data;
+
+      data1[iata] = city;
+      return data1;
+    }, {});
+  }
+
+  public async get(hostname: string, path: string): Promise<string> {
+    return new Promise((resolve, reject) => {
+      const req = plugins.https.request(
+        {
+          hostname,
+          path,
+          method: 'GET',
+        },
+        (res) => {
+          const body = [];
+          res.on('data', (chunk) => {
+            body.push(chunk);
+          });
+          res.on('end', () => {
+            try {
+              resolve(Buffer.concat(body).toString());
+            } catch (e) {
+              reject(e);
+            }
+          });
+          req.on('error', (err) => {
+            reject(err);
+          });
+        }
+      );
+
+      req.end();
+    });
+  }
+
+  public async download(bytes) {
+    const options = {
+      hostname: 'speed.cloudflare.com',
+      path: `/__down?bytes=${bytes}`,
+      method: 'GET',
+    };
+
+    return this.request(options);
+  }
+
+  public async request(options, data = '') {
+    let started;
+    let dnsLookup;
+    let tcpHandshake;
+    let sslHandshake;
+    let ttfb;
+    let ended;
+
+    return new Promise((resolve, reject) => {
+      started = plugins.perfHooks.performance.now();
+      const req = plugins.https.request(options, (res) => {
+        res.once('readable', () => {
+          ttfb = plugins.perfHooks.performance.now();
+        });
+        res.on('data', () => {});
+        res.on('end', () => {
+          ended = plugins.perfHooks.performance.now();
+          resolve([
+            started,
+            dnsLookup,
+            tcpHandshake,
+            sslHandshake,
+            ttfb,
+            ended,
+            parseFloat(res.headers['server-timing'].slice(22) as any),
+          ]);
+        });
+      });
+
+      req.on('socket', (socket) => {
+        socket.on('lookup', () => {
+          dnsLookup = plugins.perfHooks.performance.now();
+        });
+        socket.on('connect', () => {
+          tcpHandshake = plugins.perfHooks.performance.now();
+        });
+        socket.on('secureConnect', () => {
+          sslHandshake = plugins.perfHooks.performance.now();
+        });
+      });
+
+      req.on('error', (error) => {
+        reject(error);
+      });
+
+      req.write(data);
+      req.end();
+    });
+  }
+
+  public async fetchCfCdnCgiTrace(): Promise<{
+    fl: string,
+    h: string,
+    ip: string,
+    ts: string,
+    visit_scheme: string,
+    uag: string,
+    colo: string,
+    http: string,
+    loc: string,
+    tls: string,
+    sni: string,
+    warp: string,
+    gateway: string,
+  }> {
+    const parseCfCdnCgiTrace = (text) =>
+      text
+        .split('\n')
+        .map((i) => {
+          const j = i.split('=');
+
+          return [j[0], j[1]];
+        })
+        .reduce((data, [k, v]) => {
+          if (v === undefined) return data;
+
+          // Bypass prettier "no-assign-param" rules
+          const data1 = data;
+          // Object.fromEntries is only supported by Node.js 12 or newer
+          data1[k] = v;
+
+          return data1;
+        }, {});
+
+    return this.get('speed.cloudflare.com', '/cdn-cgi/trace').then(parseCfCdnCgiTrace);
+  }
+}