从Node/Express:OSError:Invalid chunk header发布到Python Flask服务器

我试图将一些json发布到python flask服务器,但出现以下错误:

OSError: Invalid chunk header

let apiParams = {
    host: "0.0.0.0",
    port: "5000",
    path: "/",
    method: "POST",
    headers: {
        "Content-Type": "application/json"
    }
};

generatePostRequest(apiParams) {
        let req = http.request(apiParams, function (res) {
            console.log('Status: ' + res.statusCode);
            console.log('Headers: ' + JSON.stringify(res.headers));
            res.setEncoding('utf8');
            res.on('data', function (body) {
                console.log('Body: ' + body);
            });
            req.on('error', function(e) {
                console.log('problem with request: ' + e.message);
            });
        });
        return req;
}
 let req = this.generatePostRequest(apiParams);
 req.write(JSON.stringify({text:"this is only a test"}));  

console.log输出

Headers: {"content-type":"application/json","content-length":"37","server":"Werkzeug/0.14.1 Python/3.7.0","date":"Fri, 12 Oct 2018 17:46:23 GMT"}
Body: {"message": "Internal Server Error"}

简单的get请求有效

getRequest() {
        let res = fetch('http://0.0.0.0:5000') 
        .then((response) => {        
             return response.json();
        })    
        .then(function(data){
            console.log(data);
            return data;
        })
        .catch(function(e) {      
            console.log(e);
        });    
        return res;
    }

根据以下评论中的建议(谢谢@robertklep),我更新了以下内容:

let req = this.generatePostRequest(apiParams);
req.write(json);    
req.end();

现在可以了!