Node.js 从服务器向服务器发送数据时，请求正文为空

我正在尝试从客户端（角度）向nodejs服务器获取数据

我已经声明了一项服务

export class AddTaskService {

  constructor(private http: HttpClient) { }
  url = 'http://localhost:3000/tasks';
  posttasks(task) {
    return this.http.post<string>(this.url, JSON.stringify({ task: task }));
  }

}

路由器.js

router
    .route("/tasks")
    .post(function (req, res) {
        var taskModel = new taskSchema();
        taskModel.task = req.body.task;
        console.log(req.body);
        taskModel.save(function (err) {
            if (err) {
                res.send(err);
            }
            res.json({
                message: "nouvProj created!"
            });
        });
    });

使用带有

x-www-form-urlencoded

的邮递员是可行的，但是当我发送数据

req.body

为空时，它是有角度的

编辑： 以下是url网络详细信息： 概述

Request URL: http://localhost:3000/tasks
Request Method: POST
Status Code: 200 OK
Remote Address: [::1]:3000
Referrer Policy: no-referrer-when-downgrade

响应标题

Access-Control-Allow-Headers: Origin, X-Requested-With, Content-Type, Accept
Access-Control-Allow-Methods: GET, POST, PUT ,DELETE
Access-Control-Allow-Origin: *
Connection: keep-alive
Content-Length: 31
Content-Type: application/json; charset=utf-8
Date: Sun, 27 May 2018 19:24:57 GMT
ETag: W/"1f-NlZ/5EsK7Z/S3Ze5LQN4AonQQ90"
X-Powered-By: Express

Accept: application/json, text/plain, */*
Accept-Encoding: gzip, deflate, br
Accept-Language: fr-FR,fr;q=0.9,ar-TN;q=0.8,ar;q=0.7,en-US;q=0.6,en;q=0.5
Cache-Control: no-cache
Connection: keep-alive
Content-Length: 14
Content-Type: text/plain
DNT: 1
Host: localhost:3000
Origin: http://localhost:4200
Pragma: no-cache
Referer: http://localhost:4200/
User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/66.0.3359.139 Safari/537.36

请求标题

Access-Control-Allow-Headers: Origin, X-Requested-With, Content-Type, Accept
Access-Control-Allow-Methods: GET, POST, PUT ,DELETE
Access-Control-Allow-Origin: *
Connection: keep-alive
Content-Length: 31
Content-Type: application/json; charset=utf-8
Date: Sun, 27 May 2018 19:24:57 GMT
ETag: W/"1f-NlZ/5EsK7Z/S3Ze5LQN4AonQQ90"
X-Powered-By: Express

Accept: application/json, text/plain, */*
Accept-Encoding: gzip, deflate, br
Accept-Language: fr-FR,fr;q=0.9,ar-TN;q=0.8,ar;q=0.7,en-US;q=0.6,en;q=0.5
Cache-Control: no-cache
Connection: keep-alive
Content-Length: 14
Content-Type: text/plain
DNT: 1
Host: localhost:3000
Origin: http://localhost:4200
Pragma: no-cache
Referer: http://localhost:4200/
User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/66.0.3359.139 Safari/537.36

请求有效负载

{task: "klj"}
task
:
"klj"

---

您可以将HTTP头作为选项传递：

const httpOptions = {
    headers: new HttpHeaders({
        'Content-Type': 'application/x-www-form-urlencoded',
    })
}
return this.http.post<string>(this.url, task, httpOptions);

const httpOptions={
标题：新的HttpHeaders({
“内容类型”：“应用程序/x-www-form-urlencoded”，
})
}
返回this.http.post（this.url、task、httpOptions）；

正如@Joshua所建议的，但是你只需要稍微改变一下

const httpOptions = {
    headers: new HttpHeaders({
        'Content-Type': 'application/x-www-form-urlencoded',
    })
}
return this.http.post<string>(this.url, {task, httpOptions});

createTask（任务）{
const-httpOptions={headers:newhttpheaders（{'Content-Type'：'application/json}）}；
const json=json.stringify（任务）；
this.http.post（this.url、json、this.httpOptions）；
}

你能发布你在放置console.log（JSON.stringify（req.body））时看到的内容吗；查看chrome中的“网络”选项卡，确定您的请求的去向可能重复的^？链接的问题是Angularjs，这是Angularjs。@MattPengelly console.log的结果是{}console.log的结果是

{{“task”：“value”}:'}

，而预期

{“task”：“value”}

删除JSON.stringify并直接发送javascript对象您缺少应用程序/JSON的结束引号