Http post 405方法不允许

Question

Apologize if this is a newbie question or for using inaccurate terminology. coz I am a newbie.

I built a simple python api to read and write into a database (csv file) my front end is Angular 5. I managed to get the data in full from the file on the server, but I cannot post to it. Here is the issue (it seems!)

The method I am using is post and the data is an array of JSON.

This is the code of interest: component.ts side:

this._svc.postAPI(this.csvData)
    .subscribe(
      res => console.log(res),
    error => alert('Error!'),
  ()=> 'Data Submitted to database') 
  }

services.ts side:

postAPI(data): Observable<any>{
    return this.http.post(this.urlAPI, data);
  }

Error I am getting is 405 Method Not Allowed and console's Network shows:

General

Request URL: http://192.168.0.2:5050/api
Request Method: OPTIONS
Status Code: 405 Method Not Allowed
Remote Address: 192.168.0.2:5050
Referrer Policy: no-referrer-when-downgrade

Response Headers

Allow: POST
Content-Length: 23
Content-Type: text/plain; charset=utf-8
Date: Thu, 12 Jul 2018 03:20:39 GMT
Server: Python/3.5 aiohttp/2.3.10

Request Headers

Accept: */*
Accept-Encoding: gzip, deflate
Accept-Language: en-US,en;q=0.9
Access-Control-Request-Headers: content-type
Access-Control-Request-Method: POST
Connection: keep-alive
Host: 192.168.0.2:5050
Origin: http://evil.com/
User-Agent: Mozilla/5.0 (Windows NT 6.3; Win64; x64) AppleWebKit/537.36 
(KHTML, like Gecko) Chrome/67.0.3396.99 Safari/537.36

Everything works fine using postman, the URL seems to be correct but the issue seems to be with the data itself.

I tried these:

This did NOT work:

postAPI(data): Observable<any>{
return this.http.post(this.urlAPI, '{}');
}

but this DID work:

postAPI(data): Observable<any>{
return this.http.post(this.urlAPI, '[{}]');
}

and this DID work:

postAPI(data): Observable<any>{
return this.http.post(this.urlAPI, '
[
    {
        "info": "A",
        "dev": "T",
        "but": "C",
        "msg": "X"
    }
]
');
    }

I believe the data that I am trying to post is also in this exact format, a JSON array.

Any assistance is greatly appreciated.

Answer 1

405 indicates something wrong with your script. Considering one version works, its unlikely to be the web server. You need to have the [] brackets for this type.