All files / utils httpProgressMiddleware.js

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  /* @flow */
 
export default function httpProgressMiddleware(req: any) {
  let loaded = 0;
  let total = 0;
  req.on("response", res => {
    if (total === 0) {
      total = res.headers["content-length"];
    }
 
    res.on("data", function(data) {
      loaded += data.length;
 
      req.emit("progress", { direction: "download", loaded: loaded, total: total });
    });
  });
}