PDF Generation

.eslintrc

@@ -1,4 +1,5 @@
 {
+  "ignorePatterns": ["pdfkit.js"],
   "extends": "airbnb",
   "parser": "babel-eslint",
   "plugins": ["lodash"],

.nvmrc

@@ -0,0 +1 @@
+16.20.1

.travis.yml

@@ -3,7 +3,7 @@ sudo: false
 language: node_js
 
 node_js:
-  - 12.14.0
+  - 16.20.1
   - node
 
 cache: yarn
@@ -29,6 +29,7 @@ services:
 script:
   - yarn run lint
   - ./artifact.sh
+  - yarn test
 
 matrix:
   allow_failures:

Dockerfile

@@ -1,9 +1,9 @@
 ### Stage 0 - Base image
-FROM node:12.14.0-alpine as base
+FROM node:16.20.1-alpine as base
 WORKDIR /app
 RUN apk --no-cache update && \
     apk --no-cache upgrade && \
-    apk add --no-cache --virtual .build-dependencies python make g++ && \
+    apk add --no-cache --virtual .build-dependencies python3 make g++ && \
     mkdir -p node_modules && chown -R node:node .
 
 

app.js

@@ -1,22 +1,19 @@
 /* eslint no-restricted-syntax: [0, "ForInStatement"] */
 
-import _ from 'lodash';
-import fs from 'fs';
-import http from 'http';
-import https from 'https';
-import express from 'express';
-import bodyParser from 'body-parser';
-
-import userDataHandler from './lib/userDataHandler';
-import userReportHandler from './lib/userReportHandler';
-import { exportTimeout, register, logMaker } from './lib/utils';
+const _ = require('lodash');
+const fs = require('fs');
+const http = require('http');
+const https = require('https');
+const express = require('express');
+const bodyParser = require('body-parser');
+const { createTerminus } = require('@godaddy/terminus');
+const { exportTimeout, register, logMaker } = require('./lib/utils');
+const handlers = require('./lib/handlers');
 
 export const log = logMaker('app.js', {
   level: process.env.DEBUG_LEVEL || 'info',
 });
 
-const { createTerminus } = require('@godaddy/terminus');
-
 function maybeReplaceWithContentsOfFile(obj, field) {
   const potentialFile = obj[field];
   if (potentialFile != null && fs.existsSync(potentialFile)) {
@@ -54,9 +51,9 @@ app.use(
   }),
 );
 
-app.get('/export/:userid', userDataHandler());
-
-app.post('/export/report/:userid', userReportHandler());
+app.get('/export/:userid', handlers.getUserData());
+app.get('/export/report/:userid', handlers.getUserReport());
+app.post('/export/report/:userid', handlers.postUserReport());
 
 function beforeShutdown() {
   return new Promise((resolve) => {

lib/handlers/getUserReportsHandler.js

@@ -0,0 +1,75 @@
+const fs = require('fs');
+const {
+  getSessionHeader,
+  createCounter,
+  exportTimeout,
+  logMaker,
+} = require('../utils');
+
+const { generateReport } = require('../reportUtils');
+
+const reportStatusCount = createCounter(
+  'tidepool_get_report_status_count',
+  'The number of errors for each status code.',
+  ['status_code', 'report_params'],
+);
+
+const log = logMaker('getUserReportsHandler.js', {
+  level: process.env.DEBUG_LEVEL || 'info',
+});
+
+module.exports = function getUserReportsHandler() {
+  return async (req, res) => {
+    // Set the timeout for the request. Make it 10 seconds longer than
+    // our configured timeout to give the service time to cancel the API data
+    // request, and close the outgoing data stream cleanly.
+    req.setTimeout(exportTimeout + 10000);
+
+    try {
+      const userId = req.params.userid;
+      const {
+        dob,
+        fullName,
+        mrn,
+        bgUnits,
+        tzName,
+        restricted_token: restrictedToken,
+        reports,
+      } = req.query;
+
+      const timer = setTimeout(() => {
+        res.emit('timeout', exportTimeout);
+      }, exportTimeout);
+
+      const pdfReport = await generateReport(
+        log,
+        {
+          userId,
+          fullName,
+          dob,
+          mrn,
+        },
+        { tzName, bgUnits, reports },
+        { token: restrictedToken, sessionHeader: getSessionHeader(req) },
+      );
+
+      res.setHeader('Content-Disposition', 'attachment: filename="report.pdf"');
+      res.setHeader('Content-Type', 'application/octet-stream');
+      const blobArrayBuffer = await pdfReport.blob.arrayBuffer();
+      const pdfBuffer = Buffer.from(blobArrayBuffer);
+      fs.writeFileSync('test.pdf', pdfBuffer);
+      res.send(pdfBuffer);
+      clearTimeout(timer);
+    } catch (error) {
+      if (error.response && error.response.status === 403) {
+        reportStatusCount.inc({ status_code: 403, report_params: req.query });
+        res.status(403);
+        log.error(`403: ${error}`);
+      } else {
+        reportStatusCount.inc({ status_code: 500, report_params: req.query });
+        res.status(500);
+        log.error(`500: ${error}`);
+      }
+    }
+  };
+};

lib/handlers/index.js

@@ -0,0 +1,9 @@
+const getUserReportsHandler = require('./getUserReportsHandler');
+const postUserReportsHandler = require('./postUserReportsHandler');
+const userDataHandler = require('./userDataHandler');
+
+module.exports = {
+  postUserReport: postUserReportsHandler,
+  getUserReport: getUserReportsHandler,
+  getUserData: userDataHandler,
+};

lib/handlers/postUserReportsHandler.js

@@ -0,0 +1,63 @@
+const fs = require('fs');
+const {
+  getSessionHeader,
+  createCounter,
+  exportTimeout,
+  logMaker,
+} = require('../utils');
+
+const { generateReport } = require('../reportUtils');
+
+const reportStatusCount = createCounter(
+  'tidepool_post_report_status_count',
+  'The number of errors for each status code.',
+  ['status_code', 'report_params'],
+);
+
+const log = logMaker('postUserReportsHandler.js', {
+  level: process.env.DEBUG_LEVEL || 'info',
+});
+
+module.exports = function postUserReportsHandler() {
+  return async (req, res) => {
+    // Set the timeout for the request. Make it 10 seconds longer than
+    // our configured timeout to give the service time to cancel the API data
+    // request, and close the outgoing data stream cleanly.
+    req.setTimeout(exportTimeout + 10000);
+
+    try {
+      const userId = req.params.userid;
+      // TODO: which token will we use here?
+      const restrictedToken = '';
+      const { userDetail, reportDetail } = req.body;
+
+      userDetail.userId = userId;
+      const timer = setTimeout(() => {
+        res.emit('timeout', exportTimeout);
+      }, exportTimeout);
+
+      const pdfReport = await generateReport(log, userDetail, reportDetail, {
+        token: restrictedToken,
+        sessionHeader: getSessionHeader(req),
+      });
+
+      res.setHeader('Content-Disposition', 'attachment: filename="report.pdf"');
+      res.setHeader('Content-Type', 'application/octet-stream');
+      const blobArrayBuffer = await pdfReport.blob.arrayBuffer();
+      const pdfBuffer = Buffer.from(blobArrayBuffer);
+      fs.writeFileSync('test.pdf', pdfBuffer);
+      res.send(pdfBuffer);
+      clearTimeout(timer);
+    } catch (error) {
+      if (error.response && error.response.status === 403) {
+        reportStatusCount.inc({ status_code: 403, report_params: req.query });
+        res.status(403);
+        log.error(`403: ${error}`);
+      } else {
+        reportStatusCount.inc({ status_code: 500, report_params: req.query });
+        res.status(500);
+        log.error(`500: ${error}`);
+      }
+    }
+  };
+};

lib/userDataHandler.js → lib/handlers/userDataHandler.js

@@ -1,9 +1,13 @@
-import axios from 'axios';
-import queryString from 'query-string';
-import dataTools from '@tidepool/data-tools';
-import {
-  buildHeaders, createCounter, exportTimeout, logMaker,
-} from './utils';
+const axios = require('axios');
+const queryString = require('query-string');
+const dataTools = require('@tidepool/data-tools');
+const {
+  getSessionHeader,
+  createCounter,
+  exportTimeout,
+  logMaker,
+  mmolLUnits,
+} = require('../utils');
 
 const dataStatusCount = createCounter(
   'tidepool_export_status_count',
@@ -15,7 +19,7 @@ const log = logMaker('userDataHandler.js', {
   level: process.env.DEBUG_LEVEL || 'info',
 });
 
-export default function userDataHandler() {
+module.exports = function userDataHandler() {
   return async (req, res) => {
     // Set the timeout for the request. Make it 10 seconds longer than
     // our configured timeout to give the service time to cancel the API data
@@ -30,7 +34,7 @@ export default function userDataHandler() {
     }
     if (req.query.startDate) {
       queryData.startDate = req.query.startDate;
-      logString += ` from ${req.query.startDate}`;
+      logString += ` = require(${req.query.startDate}`;
     }
     if (req.query.endDate) {
       queryData.endDate = req.query.endDate;
@@ -47,7 +51,7 @@ export default function userDataHandler() {
     try {
       const cancelRequest = axios.CancelToken.source();
 
-      const requestConfig = buildHeaders(req);
+      const requestConfig = getSessionHeader(req);
       requestConfig.responseType = 'stream';
       requestConfig.cancelToken = cancelRequest.token;
       const dataResponse = await axios.get(
@@ -58,7 +62,7 @@ export default function userDataHandler() {
       );
       log.debug(`Downloading data for User ${req.params.userid}...`);
 
-      const processorConfig = { bgUnits: req.query.bgUnits || 'mmol/L' };
+      const processorConfig = { bgUnits: req.query.bgUnits || mmolLUnits };
 
       let writeStream = null;
 
@@ -136,4 +140,4 @@ export default function userDataHandler() {
       }
     }
   };
-}
+};