I m trying to make a .smil (.xml) parser in javascript. But when I want to test it, node.js just say me that:

buffer.js:246
    switch(encoding && encoding.toLowerCase()){
                                ^
TypeError: Object 1 has no method 'toLowerCase'
    at Function.Buffer.isEncoding (buffer.js:246:32)
    at assertEncoding (fs.js:98:27)
    at Object.fsread (fs.js:422:5)
    at gets (/home/pi/SMIL_Parser.js:8:8)
    at read_until (/home/pi/SMIL_Parser.js:28:14)
    at home/pi/SMIL_Parser.js:64:14
    at Object.oncomplete (fs.js:93.15)

gets () is indeed one of my function:

var io=require('fs');
...
function gets (file){
    var chaine="", cache="", pkmn=0;
    io.read(file, cache, 0, 1, null, function(err, byte, buf){
        if (err || byte===0){return -1;}
        while ((cache!=="\n"))
        {
            chaine=chaine+cache;
            cache="";
            pkmn=io.readSync(file, cache, 0, 1, null);
            if (pkmn===0){return -1;}
        }
    });
}

I just don t have any idea of what go wrong, it seem to be read, but I ve made sure to get the right arguments, tried to update node.js, fs and npm. And the only similar error I found on google was a update problem.

EDIT: Added the complete error message, here function read_until:

function read_until(smil, limit){
    var line="";
    do
    {
        line=gets(smil);
        if (line===-1){return -1}
    }while (!(line.search(limit)));
    return 0;
}

.

function parse (pathname){
    var smil=0, line="", pkmn=0;
    io.open(pathname, 'r', function (err, fd){
        if (err){return -1;}
        smil=fd;
        pkmn=read_until(smil, "");
        ...

fs.read takes a buffer not a string.

Change your cache to be a buffer.

function gets (file){
    var chaine="", cache=new Buffer(), pkmn=0;
    io.read(file, cache, 0, 1, null, function(err, byte, buf){
        if (err || byte===0){return -1;}
        while ((cache!=="\n"))
        {
            chaine=chaine+cache;
            cache="";
            pkmn=io.readSync(file, cache, 0, 1, null);
            if (pkmn===0){return -1;}
        }
    });
}

See the fs.read code here

If you want to use a string as a "buffer" then you must use the legacy interface

legacy string interface fs.read(fd, length, position, encoding, callback)