npm run dev now runs on local file storage. npm start runs in production, but if there is either no aws bucket or bitly key specified as env vars, it defaults back to local storage

server/storage.js

@@ -0,0 +1,208 @@
+const AWS = require('aws-sdk');
+const s3 = new AWS.S3();
+
+const conf = require('./config.js');
+const fs = require('fs');
+const path = require('path');
+const fetch = require('node-fetch');
+const crypto = require('crypto');
+
+let isProduction =
+  conf.env === 'production' &&
+  conf.s3_bucket !== 'localhost' &&
+  conf.bitly_key !== 'localhost';
+
+if (isProduction) {
+  module.exports = {
+    length: AWSLength,
+    get: AWSGet,
+    set: AWSSet,
+    delete: AWSDelete,
+    forceDelete: AWSForceDelete
+  };
+} else {
+  module.exports = {
+    length: LocalLength,
+    get: LocalGet,
+    set: LocalSet,
+    delete: LocalDelete,
+    forceDelete: LocalForceDelete
+  };
+}
+
+function LocalLength(id) {
+  return new Promise((resolve, reject) => {
+    try {
+      resolve(fs.statSync(__dirname + '/../static/' + id).size);
+    } catch (err) {
+      reject();
+    }
+  });
+}
+
+function LocalGet(id) {
+  return fs.createReadStream(__dirname + '/../static/' + id);
+}
+
+function LocalSet(id, file, filename, client, url) {
+  return new Promise((resolve, reject) => {
+    fstream = fs.createWriteStream(__dirname + '/../static/' + id);
+    file.pipe(fstream);
+    fstream.on('close', () => {
+      let uuid = crypto.randomBytes(10).toString('hex');
+
+      client.hmset([id, 'filename', filename, 'delete', uuid]);
+      client.expire(id, 86400000);
+      console.log('Upload Finished of ' + filename);
+      resolve({
+        uuid: uuid,
+        url: url
+      });
+    });
+  });
+}
+
+function LocalDelete(id, client, delete_token) {
+  return new Promise((resolve, reject) => {
+    client.hget(id, 'delete', (err, reply) => {
+      if (!reply || delete_token !== reply) {
+        resolve(
+          new Promise((resolve, reject) => {
+            reject();
+          })
+        );
+      } else {
+        resolve(
+          new Promise((resolve, reject) => {
+            client.del(id);
+            resolve(fs.unlinkSync(__dirname + '/../static/' + id));
+          })
+        );
+      }
+    });
+  });
+}
+
+function LocalForceDelete(id, client) {
+  return new Promise((resolve, reject) => {
+    client.del(id);
+    resolve(fs.unlinkSync(__dirname + '/../static/' + id));
+  });
+}
+
+function AWSLength(id) {
+  let params = {
+    Bucket: conf.s3_bucket,
+    Key: id
+  };
+  return new Promise((resolve, reject) => {
+    s3.headObject(params, function(err, data) {
+      resolve(data.ContentLength);
+    });
+  });
+}
+
+function AWSGet(id) {
+  let params = {
+    Bucket: conf.s3_bucket,
+    Key: id
+  };
+
+  return s3.getObject(params).createReadStream();
+}
+
+function AWSSet(id, file, filename, client, url) {
+  let params = {
+    Bucket: conf.s3_bucket,
+    Key: id,
+    Body: file
+  };
+
+  return new Promise((resolve, reject) => {
+    s3.upload(params, function(err, data) {
+      if (err) {
+        console.log(err, err.stack); // an error occurred
+      } else {
+        let uuid = crypto.randomBytes(10).toString('hex');
+
+        client.hmset([id, 'filename', filename, 'delete', uuid]);
+
+        client.expire(id, 86400000);
+        console.log('Upload Finished of ' + filename);
+        resolve(
+          new Promise((resolve, reject) => {
+            if (conf.bitly_key) {
+              fetch(
+                'https://api-ssl.bitly.com/v3/shorten?access_token=' +
+                  conf.bitly_key +
+                  '&longUrl=' +
+                  encodeURIComponent(url) +
+                  '&format=txt'
+              )
+                .then(res => {
+                  return res.text();
+                })
+                .then(body => {
+                  resolve({
+                    uuid: uuid,
+                    url: body
+                  });
+                });
+            } else {
+              resolve({
+                uuid: uuid,
+                url: url
+              });
+            }
+          })
+        );
+      }
+    });
+  });
+}
+
+function AWSDelete(id, client, delete_token) {
+  return new Promise((resolve, reject) => {
+    client.hget(id, 'delete', (err, reply) => {
+      if (!reply || delete_token !== reply) {
+        resolve(
+          new Promise((resolve, reject) => {
+            reject();
+          })
+        );
+      } else {
+        client.del(id);
+        let params = {
+          Bucket: conf.s3_bucket,
+          Key: id
+        };
+
+        resolve(
+          new Promise((resolve, reject) => {
+            s3.deleteObject(params, function(err, data) {
+              resolve(err);
+            });
+          })
+        );
+      }
+    });
+  });
+}
+
+function AWSForceDelete(id, client) {
+  return new Promise((resolve, reject) => {
+    client.del(id);
+    let params = {
+      Bucket: conf.s3_bucket,
+      Key: id
+    };
+
+    resolve(
+      new Promise((resolve, reject) => {
+        s3.deleteObject(params, function(err, data) {
+          resolve(err);
+        });
+      })
+    );
+  });
+}