beweOnline

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• Streaming from NodeMCU

  @beweOnline started

  • 4 comments
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  @GermanWarez replied
• Streaming from NodeMCU

  in ESP8266 • 1 year, 9 months

  

  Thanks for your reply! While I can slice up the file into chunks and write a GET response using the node.js drain event as explained in the tutorial mentioned above, I was hoping someone could shed light on the whole matter. I'm curious as to why E.pipe() is available when E.openFile() is not! What's the use case here?

  Anyways, I post my WIP here, in case somebody's wondering. This goes into the routing callback function you'd supply to the createServer() method:

  ...
  var storage = require("Storage");
  var file = storage.read("xyz.html");
  res.writeHead(200, {'Content-Type': 'text/html'});
  
  // write response in packets
  var packet = 4096;
  var chunks = Math.ceil(file.length/packet);
  var n = 1;
  res.on('drain',function() {
       if(n===1){res.write(file.slice(0,packet*­n));}
       else if(n>=2 && n<=chunks){
         res.write(file.slice(packet*(n-1),packet­*n));
       }
       n++;
       if(n>chunks){res.end();}
  });
  res.write();
  

• Streaming from NodeMCU

  in ESP8266 • 1 year, 9 months

  

  Dear all!
  Reading a file with require("Storage").read() but running out of mem with larger files, like serving a ~20kb html file. So I want to stream instead as suggested here. However, if the NodeMCU hasn't got E.openFile(), how then do you open a file for streaming such that I might use E.pipe()?
  Scratching my head over this one. Any help much appreaciated!