How to use the errorHandler function from raven

log.js

GitHub: goodwings/flex-template-web

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 * Returns a Sentry error handler in case
 * Sentry client is set up.
 */
exports.errorHandler = () => {
  if (SENTRY_DSN) {
    return Raven.errorHandler();
  } else {
    return (err, req, res, next) => {
      next(err);
    };

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error-handler.js

GitHub: Financial-Times/origami-service

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function errorHandler(options) {
        options = defaultOptions(options);

        // Handler for sending errors to Sentry
        const ravenErrorHandler = raven.errorHandler();

        // Handler for rendering to the user
        function standardErrorHandler(error, request, response) {
                const ft = request.app.ft;

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main.js

GitHub: Financial-Times/n-raven

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// Support for the legacy captureError function.
raven.captureError = raven.captureException.bind(raven);

module.exports = raven;

const _errorHandler = raven.errorHandler.bind(raven);
module.exports.errorHandler = function () {
        const middleware = _errorHandler();
        return (err, req, res, next) => {
                if (!res.locals.suppressRavenLogger) {

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+ 3 other calls in file

sentry.js

GitHub: tarikbc/API-Cryptocurrency

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    if (!Raven.installed) {
      return next(err)
    }

    return Raven.errorHandler()(err, req, res, next)
  }
}

module.exports = {

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