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pythonjson
Ntshembo Hlongwane
Ntshembo Hlongwane

Reputation: 1051

Python HTTPServer: Reponse not getting sent (Looking to return JSON)

Hey there I am working on a Basic server with Python now I am testing out how I can return JSON data, but then now I am failing to return that JSON data.

This is how I am trying to send back JSON to client:

response= {
   "name":'junior',
   "name":'junior'
}
self.send_response(200)
self.wfile.write(bytes(json.dumps(response, ensure_ascii=False), 'utf-8'))
self.send_header('Content-type', 'application/json')
self.end_headers()

Below is the entire source code:

import ast
import json
from http.server import HTTPServer, BaseHTTPRequestHandler
from http import HTTPStatus

class ServiceHandler(BaseHTTPRequestHandler):
    
  def do_GET(self):
    print(self.path)


  def do_POST(self):
    content_len = int(self.headers.get('Content-Length'))
    post_body = self.rfile.read(content_len)  
    body = ast.literal_eval(post_body.decode("utf-8"))
    response= {
       "name":'junior',
       "name":'junior'
    }
    self.send_response(200)
    self.wfile.write(bytes(json.dumps(response, ensure_ascii=False), 'utf-8'))
    self.send_header('Content-type', 'application/json')
    self.end_headers()
        
   
#Server Initialization
server = HTTPServer(('127.0.0.1',8080), ServiceHandler)
server.serve_forever()

Can I please get some help on how I can return back JSON data

Upvotes: 0

Views: 99

Answers (2)

Mark Tolonen
Mark Tolonen

Reputation: 177901

The headers have to be sent before the data, but also how are you asking for the POST request? Here's an example that just uses a GET:

import json
from http.server import HTTPServer, BaseHTTPRequestHandler

class ServiceHandler(BaseHTTPRequestHandler):

    def do_GET(self):
        response= {
           "name":'junior',
           "name2":'junior'
        }
        self.send_response(200)
        self.send_header('Content-type', 'application/json')
        data = json.dumps(response).encode()
        self.end_headers()
        self.wfile.write(json.dumps(response).encode())

server = HTTPServer(('',8080), ServiceHandler)
server.serve_forever()

>>> print(requests.get('http://127.0.0.1:8080').json())
{'name': 'junior', 'name2': 'junior'}

Upvotes: 1

mhawke
mhawke

Reputation: 87124

Send headers before the body like this:

self.send_response(200)
self.send_header('Content-type', 'application/json')
self.end_headers()
self.wfile.write(bytes(json.dumps(response, ensure_ascii=False), 'utf-8'))

Upvotes: 1

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