Question

每当我注册用户时，我都想从我的nodejs服务器发送电子邮件。我正在使用Angular5作为前端。它不返回任何错误，但也不起作用。好像根本没有调用我的函数。这就是我尝试过的（在此示例中，电子邮件不是真实的）：

server.js

app.post('/sendMails', function(req,res) {

    console.log("WENT INTO SEND MAILS!!!")


    let transporter = nodemailer.createTransport({
        service: 'gmail',
        secure: false,
        port: 25,
        auth: {
            user: 'someemail@gmail.com',
            pass: process.env.MAIL_PASSWORD
        },

        tls: {
            rejectUnauthorized: false
        },

    });

    let HelperOptions = {

        from: '"Babababa" <someemail@gmail.com>',
        to: 'someemail@gmail.com',
        subject: 'Hello world',
        text: 'hey dude'
    };

    transporter.sendMail(HelperOptions, (error, response) => {
        if(error) {
           return console.log(error);
           res.json({error: "API Error"});
        }

        else{
            console.log("The message is sent: " + response.message);
            res.json({response: "sent"})
        }




    })


    });

来自Angular

UserService.ts（相关部分）

constructor(private http: HttpClient) { }

      sendMail(user: User){
    console.log("sendMail()  was called.")
    return this.http.post("http://localhost:3000/sendMails", user.email);
  }

这在注册时在我的注册组件中被调用

registration.component.ts

     public signUp(){

    //marks all fields as touched.
    this.fs.markFormGroupTouched(this.registerForm);


    if(this.registerForm.valid) {

      let user: User = this.registerForm.value;
      console.log(user)

      this.userService.createUser(user);
      this.userService.sendMail(user); //<--- only this is relevant for this case.

    }
    else {
      //shows the error messages, for the not valid input fields.
      this.formErrors = this.fs.validateForm(this.registerForm,
      this.formErrors, false)
    }



  }

当我运行此代码时，没有错误。在检查器/客户端控制台窗口中，我看到消息“ sendMail（）被调用。” ，这意味着它正在明确地调用我的服务。但是，我没有收到邮件也没有任何错误

Answer 1

http.post()中的sendMail()返回一个可观察值。您必须订阅此可观察的，否则将不执行。

因此在registration.component.ts中，您需要类似以下内容：

this.userService.sendMail(user).subscribe(
  response => {
    console.log(response);
  }
);

Answer 2

您还需要在sendMail函数调用中包含return语句。在错误块中，res.send是无法访问的代码。下面的修改代码：

In [1]: import numpy
   ...: import pandas
   ...: easy_matrix_example = numpy.array([
   ...:    [100,   20200,   20900 ],
   ...:    [200,   80200,   80900 ],
   ...:    [300,  180200,  180900 ],
   ...:    [400,  320200,  320900 ],
   ...:    [500,  500200,  500900 ],
   ...: ], dtype=numpy.float64)
   ...: easy_df_example = pandas.DataFrame(easy_matrix_example, columns=["A","B","C"])
   ...:
   ...:

In [2]: easy_df_example
Out[2]:
       A         B         C
0  100.0   20200.0   20900.0
1  200.0   80200.0   80900.0
2  300.0  180200.0  180900.0
3  400.0  320200.0  320900.0
4  500.0  500200.0  500900.0

In [5]: easy_df_example.values.flags
Out[5]:
  C_CONTIGUOUS : True
  F_CONTIGUOUS : False
  OWNDATA : False
  WRITEABLE : True
  ALIGNED : True
  WRITEBACKIFCOPY : False
  UPDATEIFCOPY : False

In [6]: df_copy = easy_df_example.copy()

In [7]: df_copy
Out[7]:
       A         B         C
0  100.0   20200.0   20900.0
1  200.0   80200.0   80900.0
2  300.0  180200.0  180900.0
3  400.0  320200.0  320900.0
4  500.0  500200.0  500900.0

In [8]: df_copy.values.flags
Out[8]:
  C_CONTIGUOUS : False
  F_CONTIGUOUS : True
  OWNDATA : False
  WRITEABLE : True
  ALIGNED : True
  WRITEBACKIFCOPY : False
  UPDATEIFCOPY : False

使用Angular5前端在NodeJS中使用nodemailer发送邮件

2 个答案: