raven-url-rewrite.js

const client = Raven.config(ravenTarget, {
  release,
  transport: function(opts) {
    // modify report urls
    const report = opts.data
    rewriteReportUrls(report)
    // make request normally
    client._makeRequest(opts)
  }
})
client.install()

function rewriteReportUrls(report) {
  // update request url
  report.request.url = transformUrl(report.request.url)
  // update exception stack trace
  report.exception.values.forEach(item => {
    item.stacktrace.frames.forEach(frame => {
      frame.filename = transformUrl(frame.filename)
    })
  })
}