Node.js 未捕获的语法错误：意外标记{

我正在尝试编写一个chai测试，我所做的只是流式传输一些音频并得到一个简单的响应：

{}

，出于某种原因，我得到了这个错误

未捕获的语法错误：意外的令牌{

当我将

fs

流输送到

req

时，如果我移除管道，但没有该流，测试工作正常

服务器代码：

router.post('/', function (clientRequest, clientResponse) {
    clientRequest.on('end', function () {//when done streaming audio
        console.log('im at the end>>>>>');
        clientResponse.setHeader('Content-Type', 'application/json'); //I've tried removing that: same result
        clientResponse.json({});
        clientResponse.end(); //I've tried removing that: same result
    }); //end clientRequest.on('end',)
});

测试代码：

var app = require('./app');

describe('server', function() {
    this.timeout(10000);
    it('should WORK!!!"', function (done){
        var req = chai.request(app).post('/speech');

        var readStream = fs.createReadStream('./test.wav');
        readStream.on('end',function(){
            console.log("readStream end>>>>>>>>>>>>>>>>>>>>>>");
            req.end(function (err, res) {
                console.log("req.end callback>>>>>>>>>>>>>>>");
                done();
            });
        });
        readStream.pipe(req);
    });
});

错误：

Uncaught SyntaxError: Unexpected token {
     at Object.parse (native)
     at _stream_readable.js:908:16

---

您可以尝试替换此命令

clientResponse.json({});

与

误差分析 代码通常是有效的，问题出在superagent内部的某个地方

实际上，这个问题缺少一些细节，所以我不得不猜测缺少的部分，比如

chai.request（app）

是使用来完成的，它反过来又使用来执行http请求

问题似乎出在superagent内部的某个地方，我能够用更多的信息重现您的错误（不确定为什么我得到更长的跟踪）：

然后测试通过，但输出“双重回调！”——它也通过了，并确认它出了问题

修复 如果没有http和superagent，做同样的事情并不复杂

首先，服务器端代码。它有一点变化-而不是

clientRequest.on（'end'），…

我将其传输到写入流。这样，我还可以检查文件是否已实际传输：

var express = require('express');
var fs = require('fs');

var app = express();

module.exports = app;

app.post('/speech', function (clientRequest, clientResponse) {
    console.log('speech');
    var writeStream = fs.createWriteStream('./test_out.wav');
    //for me on('end'... doesn't work (it infinitely waits for event
    //probably because the file is small and it finishes before we
    //get here
    clientRequest.pipe(writeStream).on('finish', function() {
        console.log('im at the end>>>>>');
        clientResponse.json({'a':'b'});
    });
});

app.listen(3000, function() {
  console.log("App started");
});

以及测试：

var fs = require('fs');
var chai = require('chai');
var http = require('http');

// Require our application and create a server for it
var app = require('./unexpected');
var server = http.createServer(app);
server.listen(0);
var addr = server.address();

describe('server', function() {
    this.timeout(10000);
    it('should WORK!!!"', function (done){
        // setup read stream
        var readStream = fs.createReadStream('./test.wav');
        readStream.on('end',function(){
            console.log("readStream end>>>>>>>>>>>>>>>>>>>>>>");
        });
        // setup the request
        var request = http.request({
            'host': 'localhost',
            'port': addr.port,
            'path': '/speech',
            'method': 'POST'
        });
        // now pipe the read stream to the request
        readStream.pipe(request).on('finish', function() {
            console.log("pipe end>>>>>>>>>>>>>>>>>>>>>>");
        });
        // get the response and finish when we get all the response data
        request.on('response', function(response) {
            console.log("request end>>>>>>>>>>>>>>>>>>>>>>");
            response.on('data', function(data) {
                console.log('response data: ' + data);
            });
            response.on('end', function(data) {
                console.log('done!');
                done();
            });
        });
    });
});

---

我认为代码应该是不言自明的，我只是使用标准节点来完成这项工作。

如果我没有错，如果你使用

.json（…）

你已经“结束”了响应，所以你不需要

clientResponse.end（）

没有问题。谢谢您的澄清，这不会改变结果。您能告诉我们哪行代码是908吗？老实说，您显示的代码似乎没有任何意外的

{

…它可能在另一个文件中…第90行在_stream_readable.js中，这是一个内部javascript文件，我不知道这对你有多大帮助这是完整的错误消息吗？看起来有一部分被剪切了。你能提供完整的服务器代码吗？特别是主体解析的东西。我试过了，没用，我也试过放Clientreponse.end（）；在发送之后，也没有帮助

var server=http.createServer（app）；

这是我一直在寻找的一行，所以你说超级代理有问题，我应该在他们的github上发布问题？@bubakazouba不知怎么地超级代理的请求文本翻了一倍（虽然只有一个对服务器的实际请求）。因此，即使实际问题在http或原始测试代码中，我认为superagent不应该允许这种情况。

var readStream = fs.createReadStream('./test.wav');
readStream.pipe(req);
readStream.on('end',function(){
    ...

var express = require('express');
var fs = require('fs');

var app = express();

module.exports = app;

app.post('/speech', function (clientRequest, clientResponse) {
    console.log('speech');
    var writeStream = fs.createWriteStream('./test_out.wav');
    //for me on('end'... doesn't work (it infinitely waits for event
    //probably because the file is small and it finishes before we
    //get here
    clientRequest.pipe(writeStream).on('finish', function() {
        console.log('im at the end>>>>>');
        clientResponse.json({'a':'b'});
    });
});

app.listen(3000, function() {
  console.log("App started");
});

var fs = require('fs');
var chai = require('chai');
var http = require('http');

// Require our application and create a server for it
var app = require('./unexpected');
var server = http.createServer(app);
server.listen(0);
var addr = server.address();

describe('server', function() {
    this.timeout(10000);
    it('should WORK!!!"', function (done){
        // setup read stream
        var readStream = fs.createReadStream('./test.wav');
        readStream.on('end',function(){
            console.log("readStream end>>>>>>>>>>>>>>>>>>>>>>");
        });
        // setup the request
        var request = http.request({
            'host': 'localhost',
            'port': addr.port,
            'path': '/speech',
            'method': 'POST'
        });
        // now pipe the read stream to the request
        readStream.pipe(request).on('finish', function() {
            console.log("pipe end>>>>>>>>>>>>>>>>>>>>>>");
        });
        // get the response and finish when we get all the response data
        request.on('response', function(response) {
            console.log("request end>>>>>>>>>>>>>>>>>>>>>>");
            response.on('data', function(data) {
                console.log('response data: ' + data);
            });
            response.on('end', function(data) {
                console.log('done!');
                done();
            });
        });
    });
});