Difference between revisions of "Python:REST"

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Line 4: Line 4:
 
* Stateless as the server does not hold client context (history). Pre: simple, Con: sometimes more requests needed.
 
* Stateless as the server does not hold client context (history). Pre: simple, Con: sometimes more requests needed.
  
Example code, fetching a file:
+
Example code, fetching data, session state (login information) is kept by the client.
  
 
<syntaxhighlight lang=python>
 
<syntaxhighlight lang=python>
Line 27: Line 27:
 
                                 data={"USERNAME":<user>,"PASSWORD":<password>},
 
                                 data={"USERNAME":<user>,"PASSWORD":<password>},
 
                                 verify=False)
 
                                 verify=False)
     print "login status: "+str(response.status_code)
+
     print ("login status: "+str(response.status_code))
  
 
     response = rest_session.get(rest_url+command_url,verify=False,stream=True)
 
     response = rest_session.get(rest_url+command_url,verify=False,stream=True)
     print "Command status: "+str(response.status_code)
+
     print ("Command status: "+str(response.status_code))
 
     if response.status_code == 200:
 
     if response.status_code == 200:
 
+
         print(session.content)
         open (<outputfile>, 'wb').write(response.content)
 
        #with open (<filename>, 'wb') as f:
 
        #    for chunk in response.iter_content(chunk_size=1024):
 
        #        f.write(chunk)
 
 
 
 
     response = rest_session.post(rest_url+"/logout", verify=False)
 
     response = rest_session.post(rest_url+"/logout", verify=False)
 
     return()
 
     return()

Revision as of 21:14, 1 June 2019

REST, REpresentational State Transfer

  • Transports JSON-formatted data over HTTP
  • Stateless as the server does not hold client context (history). Pre: simple, Con: sometimes more requests needed.

Example code, fetching data, session state (login information) is kept by the client.

#!/usr/bin/env python

import requests
import json
import sys
import urllib3

urllib3.disable_warnings(urllib3.exceptions.InsecureRequestWarning)

rest_host = "<servername>"
rest_url = "https://"+rest_host
command_url = "<filepath>"

post_headers = '{"Content-Type":"application/json"}'

def main():
    rest_session = requests.Session()
    response = rest_session.post(rest_url+"/login",
                                data={"USERNAME":<user>,"PASSWORD":<password>},
                                verify=False)
    print ("login status: "+str(response.status_code))

    response = rest_session.get(rest_url+command_url,verify=False,stream=True)
    print ("Command status: "+str(response.status_code))
    if response.status_code == 200:
        print(session.content)
    response = rest_session.post(rest_url+"/logout", verify=False)
    return()

main()