compare event based handling of post-request with piping

@Wilberforce
Were you ever able to to upload files to your espruino with the pipe?

I am following your example, but I am not seeing the complete file save in the flash.

File index.htm size is 4752, printed POST data is "cRcv": 4752, but file in flash does not match.

I know that the problem is not in the filesystem, because using "multipart/form-data" on the form post I get the complete file... plus some added strings like this:

------WebKitFormBoundaryZ2Lus84JA68itxnM
Content-Disposition: form-data; name="file"; filename="index.html"
Content-Type: text/html

...html file contents...

------WebKitFormBoundaryZ2Lus84JA68itxnM--

httpSRq: { "type": 1,
  "res": httpSRs: {  },
  "svr": httpSrv: { "type": 1,
    "#onconnect": function (b,d) {if(b.headers.Connection&&0<=b.headers.Connection.indexOf("Upgrade")){var f=b.headers["Sec-WebSocket-Key"];f=btoa(E.toString(require("crypto").SHA1(f+"258EAFA5-E914-47DA-95CA-C5AB0DC85B11")));d.writeHead(101,{Upgrade:"websocket",Connection:"Upgrade","Sec-WebSocket-Accept":f,"Sec-WebSocket-Protocol":b.headers["Sec-WebSocket-Protocol"]});var g=new e(void 0,{masking:!1,connected:!0});g.socket=d;b.on("data",g.parseData.bind(g));b.on("close",function(){clearInterval(g.srvPing);g.srvPing=void 0;g.emit("close")});
g.srvPing=setInterval(function(){g.emit("ping",!0);g.send("ping",137)},g.keepAlive);c.emit("websocket",g)}else a(b,d)},
    "#onwebsocket": function (ws) {print(ws);
        ws.on('message', msg => { print("[WS] " + JSON.stringify(msg)); });
        ws.on('close', evt => { print("[WS] CLOSED"); });},
    "port": 80, "sckt": 4098 },
  "sckt": 4099,
  "headers": {
    "Host": "192.168.25.8",
    "Connection": "keep-alive",
    "Content-Length": "4752",
    "Origin": "http://192.168.25.8",
    "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/72.0.3626.53 Safari/537.36",
    "DNT": "1",
    "Accept": "*/*",
    "Referer": "http://192.168.25.8/upload",
    "Accept-Encoding": "gzip, deflate",
    "Accept-Language": "pt-BR,pt;q=0.9,en-US;q=0.8,en;q=0.7,it;q=0.6,ja;q=0.5,es;q=0.4"
   },
  "cRcv": 4752,
  "method": "PUT",
  "url": "/upload",
  "hdrs": true,
  "dRcv": ""
 }

>fs.statSync("upload")
={ "size": 3216, "dir": false,
  "mtime": Date: Mon Feb 1 2077 00:00:00 GMT+0000
 }

        if (a.pathname == "/upload") {
            print(req);
            if (req.method == "PUT") {
                try {
                  fs.unlink(a.pathname);
                }
                catch (e) { }
                var f = E.openFile(a.pathname, "w");
                req.pipe(f, {
                    chunkSize: 512, end: false,
                    complete: () => {
                        f.close();
                        res.end();
                    }
                });
            }
            else {
                res.writeHead(200, {'Content-Type':'text/html'});
                res.end(html_index);
            }
        }