如何在Node.js中流化文件并将编码保持为ansi（windows-1252） [英] How do I stream a file and keep the encoding as ansi (windows-1252) in Node.js

问题描述

我使用Formidable将文件上传到我的Node-js webserver（本地安装进行测试）。该文件在ansi（iso-8859-1）之前，我上传它，它仍然是当它已经上传，我已经使用记事本++检查该文件。

I use Formidable to upload a file to my Node-js webserver (local installation for testing). The file is in ansi (iso-8859-1) before I upload it, and it still is when it has been uploaded, I've checked the file using Notepad++.

var form = new formidable.IncomingForm();

    form.parse(req, function(err, fields, files) {

            csv
            .fromPath(files.upfile.path, {headers: true})
            .on("record", function(data){
                console.log(data.adresse);
            })
            .on("end", function(){
                console.log("done");
            });

            res.end(console.log("form done"));

        });

一旦我使用流或插件（在这种情况下为fast-csv）节点fs流式传输内容，编码被打扰。看到下面的数据，？应该是丹麦字符ø。

As soon as I use a stream or a plugin(fast-csv in this case) that uses a node fs to stream the content, the encoding is botched. See the data below, the ? should be the danish character ø.

{adresse: 'Niver?d By, Karlebo'}

任何人都可以告诉我为什么？

Can anyone tell me why?

更新： strong>

Update:

它通过流式传输上传的文件并使用Iconv进行转换。

It worked by streaming the uploaded file and using Iconv to convert it.

router.post('/upload', function(req, res) {

    var form = new formidable.IncomingForm();


        form.parse(req, function(err, fields, files) {

            console.log(files.upfile.path);

            var stream = fs.createReadStream(files.upfile.path);

            var csvStream = csv({headers : true})
             .on("record", function(data){
                 var db = req.db;

                // Set our collection
                var collection = db.get('bbrcollection');

                // Submit to the DB
                collection.insert(data, function (err, doc) {

                //console.log(data);

                    if (err) {
                        // If it failed, return error
                        console.log("There was a problem adding the information to the database.");
                    }
                });
             })
             .on("end", function(){
                 console.log("done");
             });

            stream
                .pipe(new Iconv('WINDOWS-1252', 'UTF-8'))
                .pipe(csvStream);

        });


  res.render('upload', { title: 'upload file'});
});

推荐答案

您必须将编码转换为utf8才能使用javascript中的内容。 iconv 和 iconv-lite 应该能够为你做。

You have to convert the encoding to utf8 to use the contents in javascript. Both iconv and iconv-lite should be able to do that for you.

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