aStream.on('end', function () {
        var source = chunks.join(''); // NOTE: Watchpoint
        var msg = null;

        try {
          source = UglifyJS.minify(source, {
            fromString: true,
            mangle: false,
            output: {
              comments: true
            },
            parse: {
              bare_returns: true
            }
          }).code;

        } catch (aE) { // On any failure default to unminified
          console.warn([
            'MINIFICATION WARNING (harmony):',
            '  message: ' + aE.message,
            '  installName: ' + aScript.installName,
            '  line: ' + aE.line + ' col: ' + aE.col + ' pos: ' + aE.pos

          ].join('\n'));

          // Set up a `Warning` header with Q encoding under RFC2047
          msg = [
            '199 ' + aReq.headers.host + ' MINIFICATION WARNING (harmony):',
            '  ' + rfc2047.encode(aE.message.replace(/\xAB/g, '`').replace(/\xBB/g, '`')),
            '  line: ' + aE.line + ' col: ' + aE.col + ' pos: ' + aE.pos,

          ].join('\u0020'); // TODO: Watchpoint... *express*/*node* exception thrown with CRLF SPACE spec


          aRes.set('Warning', msg);
        }

        aRes.write(source);
        aRes.end();
      });
      aStream.on('end', function () {
        let source = null;
        let result = null;
        let msg = null;

        if (continuation) {
          continuation = false;

          source = chunks.join(''); // NOTE: Watchpoint
          msg = null;

          try {
            result = UglifyJS.minify(source, {
              parse: {
                bare_returns: true
              },
              compress: {
                inline: false
              },
              mangle: {
              },
              output: {
                comments: true
              }
            });

            if (result.error) {
              throw result.error; // Passthrough the error if present to our handler
            } else if(!result.code) {
              throw new TypeError('UglifyJS error of `code` being absent');
            } else {
              source = result.code;

              // Calculate a based representation of the hex sha512sum
              eTag = '"'  + Base62.encode(
                parseInt('0x' + crypto.createHash('sha512').update(source).digest('hex'), 16)) +
                  ' .min.user.js"';
            }
          } catch (aE) { // On any failure default to unminified
            console.warn([
              'MINIFICATION WARNING (harmony):',
              '  message: ' + aE.message,
              '  installName: ' + aScript.installName,
              '  line: ' + aE.line + ' col: ' + aE.col + ' pos: ' + aE.pos

            ].join('\n'));

            // Set up a `Warning` header with Q encoding under RFC2047
            msg = [
              '199 ' + aReq.headers.host + ' MINIFICATION WARNING (harmony):',
              '  ' + rfc2047.encode(aE.message.replace(/\xAB/g, '`').replace(/\xBB/g, '`')),
              '  line: ' + aE.line + ' col: ' + aE.col + ' pos: ' + aE.pos,

            ].join('\u0020'); // TODO: Watchpoint... *express*/*node* exception thrown with CRLF SPACE spec


            aRes.set('Warning', msg);

            // Reset to unminified last modified date stamp
            lastModified = moment(aScript.updated)
              .utc().format('ddd, DD MMM YYYY HH:mm:ss') + ' GMT';

            // Reset to convert a based representation of the hex sha512sum
            eTag = '"'  + Base62.encode(parseInt('0x' + aScript.hash, 16)) + ' .user.js"';
          }

          // If already client-side... partial HTTP/1.1 Caching
          if (aReq.get('if-none-match') === eTag) {

            // Conditionally send lastModified
            if (aReq.get('if-modified-since') !== lastModified) {
              aRes.set('Last-Modified', lastModified);
            }

            aRes.status(304).send(); // Not Modified
            return;
          }

          // Send the script
          aRes.set('Content-Type', 'text/javascript; charset=UTF-8');
          aStream.setEncoding('utf8');

          // HTTP/1.0 Caching
          aRes.set('Expires', moment(moment() + maxAge * 1000)
            .utc().format('ddd, DD MMM YYYY HH:mm:ss') + ' GMT');

          // HTTP/1.1 Caching
          aRes.set('Last-Modified', lastModified);
          aRes.set('Etag', eTag);

          aRes.write(source);
          aRes.end();

          // NOTE: Try and force a GC
          source = null;
          chunks = null;

          // Don't count installs on raw source route
          if (aScript.isLib || aReq.params.type) {
            return;
          }

          // Update the install count
          ++aScript.installs;
          ++aScript.installsSinceUpdate;

          // Resave affected properties
          aScript.save(function (aErr, aScript) {
            // WARNING: No error handling at this stage
          });
        }
      });
  exports.getSource(aReq, function (aScript, aStream) {
    let chunks = [];
    let updateURL = null;
    let updateUtf = null;

    let matches = null;
    let rAnyLocalMetaUrl = new RegExp('^https?://(?:openuserjs\.org|oujs\.org' +
      (isDev ? '|localhost:' + (process.env.PORT || 8080) : '') +
        ')/(?:meta|install|src/scripts)/(.+?)/(.+?)\.meta\.js$');
    let hasAlternateLocalUpdateURL = false;

    let rAnyLocalHost =  new RegExp('^(?:openuserjs\.org|oujs\.org' +
      (isDev ? '|localhost:' + (process.env.PORT || 8080) : '') + ')');

    var lastModified = null;
    var eTag = null;
    var maxAge = 7 * 60 * 60 * 24; // nth day(s) in seconds
    var now = null;
    var continuation = true;

    if (!aScript) {
      aNext();
      return;
    }

    if (process.env.FORCE_BUSY_UPDATEURL_CHECK === 'true') {
      // `@updateURL` must be exact here for OUJS hosted checks
      //   e.g. no `search`, no `hash`

      updateURL = findMeta(aScript.meta, 'UserScript.updateURL.0.value');
      if (updateURL) {

        // Check for decoding error
        try {
          updateUtf = decodeURIComponent(updateURL);
        } catch (aE) {
          aRes.set('Warning', '199 ' + aReq.headers.host +
            rfc2047.encode(' Invalid @updateURL'));
          aRes.status(444).send(); // No Response
          return;
        }

        // Validate `author` and `name` (installNameBase) to this scripts meta only
        let matches = updateUtf.match(rAnyLocalMetaUrl);
        if (matches) {
          if (cleanFilename(aScript.author, '').toLowerCase() +
            '/' + cleanFilename(aScript.name, '') === matches[1].toLowerCase() + '/' + matches[2])
          {
            // Same script
          } else {
            hasAlternateLocalUpdateURL = true;
          }
        } else {
          // Allow offsite checks
          updateURL = URL.parse(updateURL);
          if (rAnyLocalHost.test(updateURL.host)) {
            hasAlternateLocalUpdateURL = true;
          }
        }
      } else {
        if (!aScript.isLib) {
          // Don't serve the script anywhere in this mode and if absent
          hasAlternateLocalUpdateURL = true;
        }
      }

      if (hasAlternateLocalUpdateURL) {
        aRes.set('Warning', '199 ' + aReq.headers.host +
          rfc2047.encode(' Invalid @updateURL in lockdown'));
        aRes.status(444).send(); // No Response
        return;
      }
    }

    // HTTP/1.1 Caching
    aRes.set('Cache-Control', 'public, max-age=' + maxAge +
      ', no-cache, no-transform, must-revalidate');

    // Only minify for response that doesn't contain `.min.` extension
    if (!/\.min(\.user)?\.js$/.test(aReq._parsedUrl.pathname) ||
      process.env.DISABLE_SCRIPT_MINIFICATION === 'true') {
      //
      lastModified = moment(aScript.updated)
        .utc().format('ddd, DD MMM YYYY HH:mm:ss') + ' GMT';

      // Convert a based representation of the hex sha512sum
      eTag = '"'  + Base62.encode(parseInt('0x' + aScript.hash, 16)) + ' .user.js"';

      // If already client-side... HTTP/1.1 Caching
      if (aReq.get('if-none-match') === eTag || aReq.get('if-modified-since') === lastModified) {
        aRes.status(304).send(); // Not Modified
        return;
      }

      //
      aStream.on('error', function (aErr) {
        // This covers errors during connection in direct view
        console.error(
          'S3 GET (chunking native) ',
            aErr.code,
              'for', aScript.installName + '\n' +
                JSON.stringify(aErr, null, ' ') + '\n' +
                  aErr.stack
        );

        if (continuation) {
          continuation = false;

          // Abort
          aNext();
          // fallthrough
        }
      });

      aStream.on('data', function (aData) {
        if (continuation) {
          chunks.push(aData);
        }
      });

      aStream.on('end', function () {
        let source = null;

        if (continuation) {
          continuation = false;

          source = chunks.join(''); // NOTE: Watchpoint

          // Send the script
          aRes.set('Content-Type', 'text/javascript; charset=UTF-8');
          aStream.setEncoding('utf8');

          // HTTP/1.0 Caching
          aRes.set('Expires', moment(moment() + maxAge * 1000).utc()
            .format('ddd, DD MMM YYYY HH:mm:ss') + ' GMT');

          // HTTP/1.1 Caching
          aRes.set('Last-modified', lastModified);
          aRes.set('Etag', eTag);

          aRes.write(source);
          aRes.end();

          // NOTE: Try and force a GC
          source = null;
          chunks = null;

          // Don't count installs on raw source route
          if (aScript.isLib || aReq.params.type) {
            return;
          }

          // Update the install count
          ++aScript.installs;
          ++aScript.installsSinceUpdate;

          // Resave affected properties
          aScript.save(function (aErr, aScript) {
            // WARNING: No error handling at this stage
          });
        }
      });

    } else { // Wants to try minified
      //
      lastModified = moment(mtimeUglifyJS > aScript.updated ? mtimeUglifyJS : aScript.updated)
        .utc().format('ddd, DD MMM YYYY HH:mm:ss') + ' GMT';

      // If already client-side... partial HTTP/1.1 Caching
      if (isPro && aReq.get('if-modified-since') === lastModified) {
        aRes.status(304).send(); // Not Modified
        return;
      }

      aStream.on('error', function (aErr) {
        // This covers errors during connection in direct view
        console.error(
          'S3 GET (chunking minified) ',
            aErr.code,
              'for', aScript.installName + '\n' +
                JSON.stringify(aErr, null, ' ') + '\n' +
                  aErr.stack
        );

        if (continuation) {
          continuation = false;

          // Abort
          aNext();
          // fallthrough
        }
      });

      aStream.on('data', function (aData) {
        if (continuation) {
          chunks.push(aData);
        }
      });

      aStream.on('end', function () {
        let source = null;
        let result = null;
        let msg = null;

        if (continuation) {
          continuation = false;

          source = chunks.join(''); // NOTE: Watchpoint
          msg = null;

          try {
            result = UglifyJS.minify(source, {
              parse: {
                bare_returns: true
              },
              compress: {
                inline: false
              },
              mangle: {
              },
              output: {
                comments: true
              }
            });

            if (result.error) {
              throw result.error; // Passthrough the error if present to our handler
            } else if(!result.code) {
              throw new TypeError('UglifyJS error of `code` being absent');
            } else {
              source = result.code;

              // Calculate a based representation of the hex sha512sum
              eTag = '"'  + Base62.encode(
                parseInt('0x' + crypto.createHash('sha512').update(source).digest('hex'), 16)) +
                  ' .min.user.js"';
            }
          } catch (aE) { // On any failure default to unminified
            console.warn([
              'MINIFICATION WARNING (harmony):',
              '  message: ' + aE.message,
              '  installName: ' + aScript.installName,
              '  line: ' + aE.line + ' col: ' + aE.col + ' pos: ' + aE.pos

            ].join('\n'));

            // Set up a `Warning` header with Q encoding under RFC2047
            msg = [
              '199 ' + aReq.headers.host + ' MINIFICATION WARNING (harmony):',
              '  ' + rfc2047.encode(aE.message.replace(/\xAB/g, '`').replace(/\xBB/g, '`')),
              '  line: ' + aE.line + ' col: ' + aE.col + ' pos: ' + aE.pos,

            ].join('\u0020'); // TODO: Watchpoint... *express*/*node* exception thrown with CRLF SPACE spec


            aRes.set('Warning', msg);

            // Reset to unminified last modified date stamp
            lastModified = moment(aScript.updated)
              .utc().format('ddd, DD MMM YYYY HH:mm:ss') + ' GMT';

            // Reset to convert a based representation of the hex sha512sum
            eTag = '"'  + Base62.encode(parseInt('0x' + aScript.hash, 16)) + ' .user.js"';
          }

          // If already client-side... partial HTTP/1.1 Caching
          if (aReq.get('if-none-match') === eTag) {

            // Conditionally send lastModified
            if (aReq.get('if-modified-since') !== lastModified) {
              aRes.set('Last-Modified', lastModified);
            }

            aRes.status(304).send(); // Not Modified
            return;
          }

          // Send the script
          aRes.set('Content-Type', 'text/javascript; charset=UTF-8');
          aStream.setEncoding('utf8');

          // HTTP/1.0 Caching
          aRes.set('Expires', moment(moment() + maxAge * 1000)
            .utc().format('ddd, DD MMM YYYY HH:mm:ss') + ' GMT');

          // HTTP/1.1 Caching
          aRes.set('Last-Modified', lastModified);
          aRes.set('Etag', eTag);

          aRes.write(source);
          aRes.end();

          // NOTE: Try and force a GC
          source = null;
          chunks = null;

          // Don't count installs on raw source route
          if (aScript.isLib || aReq.params.type) {
            return;
          }

          // Update the install count
          ++aScript.installs;
          ++aScript.installsSinceUpdate;

          // Resave affected properties
          aScript.save(function (aErr, aScript) {
            // WARNING: No error handling at this stage
          });
        }
      });
    }
  });