Error: write after end when csvConverter.fromString is called two times

My program need to parse two csv files that are stored in a json object :

csv_files = [
               {
                  "name" : "<name>",
                  "file" : "./file.csv"
               },
               [...]
           ]

I use async to execute some part of my code synchronously. And in my main program I read all file from csv_files in order to parse all csv.

If I call one time csvConverter.fromString it’s works perfectly. But when I want to do a loop (something like that) I have Error: write after end.

With this code :

[...]
        allCsv2bdd_url(csv_files[i], function(err){
            if(csv_files.length > i){
                i++;
                allCsv2bdd_url(csv_files[i], function(err){});
            }else {
                done();
            }
        });

I have the error message.

In allCsv2bdd_url I execute two functions in synchronous mode, including the csvtojson function.

    var csvLines = '';

    //- Read Lines
    try{
        fs.readFileSync(csv_file).toString().split('\n').forEach(function (line) {
            csvLines += line;
            console.log(' [url.csv] '+line);
        });
        //- Transform lines to json
        csvConverter.fromString(csvLines, function(err, jsonObj){
            if (err){
                console.log('\n [url.csv] An error as occured when trying to convert csv to JSON :\n\t'+err);
                callback( );
            } else {
                callback( jsonObj );
            }
        });
    }catch(e){
        console.log('\n [url.csv] /!\\ Cannot access to file '+csv_file+' with the following error :\n\t'+e);
        callback( );
    }

Is someone can explain why I have this problem ?

Thanks 😃

[Keyang]

Hi, You have to create new Converter instance for different files. Converter is based on stream. Once a file processing finished, the stream is closed. To process another file, create new converter.

~Keyang

On 21 April 2016 at 09:38, flexbrane [e-mail] wrote:

I tried to slightly modify my code :

try{
    //- Transform file lines to json
    csvConverter.fromFile(csv_file,function(err,jsonObj){
        if (err){
            console.log('\n [url.csv] An error as occured when trying to convert csv to JSON :\n\t'+err);
            callback( );
        } else {
            callback( jsonObj );
        }
    });
}catch(e){
    console.log('\n [url.csv] /!\\ Cannot access to file '+csv_file+' with the following error :\n\t'+e);
    callback( );
}

Same error

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[Keyang]

Thanks. I will make this better in next version.

~Keyang

On 1 November 2016 at 15:58, Dolan [e-mail] wrote:

I had the same issue and took me 3 hours to figure out the problem

I feel this needs to be more clear, a more descriptive error than:

“write after end”

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