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var should = require('should'),
needle = require('./../'),
decoder = require('./../lib/decoder'),
Q = require('q'),
chardet = require('jschardet'),
fs = require('fs'),
http = require('http'),
helpers = require('./helpers');
describe('character encoding', function() {
this.timeout(5000);
function staticServerFor(file, content_type) {
return http.createServer(function(req, res) {
req.on('data', function(chunk) {})
req.on('end', function() {
// We used to pull from a particular site that is no longer up.
// This is a local mirror pulled from archive.org
// https://web.archive.org/web/20181003202907/http://www.nina.jp/server/slackware/webapp/tomcat_charset.html
fs.readFile(file, function(err, data) {
if (err) {
res.writeHead(404);
res.end(JSON.stringify(err));
return;
}
res.writeHeader(200, { 'Content-Type': content_type })
res.end(data);
});
})
})
}
describe('Given content-type: "text/html; charset=EUC-JP"', function() {
var server, port = 2233;
before(function(done) {
server = staticServerFor('test/files/tomcat_charset.html', 'text/html; charset=EUC-JP')
server.listen(port, done)
url = 'http://localhost:' + port;
})
after(function(done) {
server.close(done)
})
describe('with decode = false', function() {
it('does not decode', function(done) {
needle.get(url, { decode: false }, function(err, resp) {
resp.body.should.be.a.String;
chardet.detect(resp.body).encoding.should.eql('windows-1252');
resp.body.indexOf('EUCを使う').should.eql(-1);
done();
})
})
})
describe('with decode = true', function() {
it('decodes', function(done) {
needle.get(url, { decode: true }, function(err, resp) {
resp.body.should.be.a.String;
chardet.detect(resp.body).encoding.should.eql('ascii');
resp.body.indexOf('EUCを使う').should.not.eql(-1);
done();
})
})
})
})
describe('Given content-type: "text/html but file is charset: gb2312', function() {
it('encodes to UTF-8', function(done) {
// Our Needle wrapper that requests a chinese website.
var task = Q.nbind(needle.get, needle, 'http://www.chinesetop100.com/');
// Different instantiations of this task
var tasks = [Q.fcall(task, {decode: true}),
Q.fcall(task, {decode: false})];
var results = tasks.map(function(task) {
return task.then(function(obj) {
return obj[0].body;
});
});
// Execute all requests concurrently
Q.all(results).done(function(bodies) {
var charsets = [
chardet.detect(bodies[0]).encoding,
chardet.detect(bodies[1]).encoding,
]
// We wanted to decode our first stream as specified by options
charsets[0].should.equal('ascii');
bodies[0].indexOf('全球中文网站前二十强').should.not.equal(-1);
// But not our second stream
charsets[1].should.equal('windows-1252');
bodies[1].indexOf('全球中文网站前二十强').should.equal(-1);
done();
});
})
})
describe('Given content-type: text/html; charset=maccentraleurope', function() {
var server, port = 2233;
// from 'https://wayback.archive-it.org/3259/20160921140616/https://www.arc.gov/research/MapsofAppalachia.asp?MAP_ID=11';
before(function(done) {
server = staticServerFor('test/files/Appalachia.html', 'text/html; charset=maccentraleurope')
server.listen(port, done)
url = 'http://localhost:' + port;
})
after(function(done) {
server.close(done)
})
describe('with decode = false', function() {
it('does not decode', function(done) {
needle.get(url, { decode: false }, function(err, resp) {
resp.body.should.be.a.String;
chardet.detect(resp.body).encoding.should.eql('ascii');
done();
})
})
})
describe('with decode = true', function() {
it('does not explode', function(done) {
(function() {
needle.get(url, { decode: true }, function(err, resp) {
resp.body.should.be.a.String;
chardet.detect(resp.body).encoding.should.eql('ascii');
done();
})
}).should.not.throw();
})
})
})
describe('Given content-type: "text/html"', function () {
var server,
port = 54321,
text = 'Magyarországi Fióktelepe'
before(function(done) {
server = helpers.server({
port: port,
response: text,
headers: { 'Content-Type': 'text/html' }
}, done);
})
after(function(done) {
server.close(done)
})
describe('with decode = false', function () {
it('decodes by default to utf-8', function (done) {
needle.get('http://localhost:' + port, { decode: false }, function (err, resp) {
resp.body.should.be.a.String;
chardet.detect(resp.body).encoding.should.eql('ISO-8859-2');
resp.body.should.eql('Magyarországi Fióktelepe')
done();
})
})
})
})
describe('multibyte characters split across chunks', function () {
describe('with encoding = utf-8', function() {
var d,
result = Buffer.allocUnsafe(0);
before(function(done) {
d = decoder('utf-8');
done();
});
it('reassembles split multibyte characters', function (done) {
d.on("data", function(chunk){
result = Buffer.concat([ result, chunk ]);
});
d.on("end", function(){
result.toString("utf-8").should.eql('慶');
done();
});
// write '慶' in utf-8 split across chunks
d.write(Buffer.from([0xE6]));
d.write(Buffer.from([0x85]));
d.write(Buffer.from([0xB6]));
d.end();
})
})
describe('with encoding = euc-jp', function() {
var d,
result = Buffer.allocUnsafe(0);
before(function(done) {
d = decoder('euc-jp');
done();
});
it('reassembles split multibyte characters', function (done) {
d.on("data", function(chunk){
result = Buffer.concat([ result, chunk ]);
});
d.on("end", function(){
result.toString("utf-8").should.eql('慶');
done();
});
// write '慶' in euc-jp split across chunks
d.write(Buffer.from([0xB7]));
d.write(Buffer.from([0xC4]));
d.end();
})
})
describe('with encoding = gb18030', function() {
var d,
result = Buffer.allocUnsafe(0);
before(function(done) {
d = decoder('gb18030');
done();
});
it('reassembles split multibyte characters', function (done) {
d.on("data", function(chunk){
result = Buffer.concat([ result, chunk ]);
});
d.on("end", function(){
result.toString("utf-8").should.eql('慶');
done();
});
// write '慶' in gb18030 split across chunks
d.write(Buffer.from([0x91]));
d.write(Buffer.from([0x63]));
d.end();
})
})
})
})