How to pass data by 'POST' method to from Javascript to Python

Question

I have this part of script from my GAE application which uses webapp2, which accepts data from a form using post,

class RenderMarksheet(webapp2.RequestHandler):
   def post(self):
     regno = self.request.get('content')  # Here's where I extract the data from the form
     ...
     ...
     ...
     self.response.out.write(template.render(templates/render.html, template_values))

And the web form which posts to this script,

<form action="/sign" method="post" name="inputform" onsubmit="return validate()">
    Register No : <input type="number" name="regno" placeholder="Your Register No."/> 
                  <input type="submit" value="Get-My-GPA!" >
</form>

Now, I want to manually pass a specific data (a register no.), without using the submit button from the form, to the python script( or the url, perhaps) , using Javascript, say a button that triggers a javascript method.

I have to POST the data using javascript(to implement AJAX). In python I do this, to post the data to a url,

import http.client, urllib.parse
params = urllib.parse.urlencode({'regno':10109104021})
headers = {"Content-type": "application/x-www-form-urlencoded",
       "Accept": "text/plain"}
conn = http.client.HTTPConnection("mydomain:8888")
conn.request("POST", "/sign", params, headers)
response = conn.getresponse()
print(response.status, response.reason)
data = response.read()

How can I post the data to the url, via Jquery or Javascript?

If your data shows up in the url, then it's not doing a POST, it's doing a GET — Marc B
– Marc B, Commented Jun 26, 2012 at 21:46
I'm unclear on what you're doing. Your series of events is unclear. Are you passing this register number after the form has been posted and you want to automatically post something else? What is the purpose of the link? Are you getting data from a webservice? You'll probably want to look at urllib2. — swasheck
– swasheck, Commented Jun 26, 2012 at 22:00
Forget about the <form>. Let the trigger be a button, that calls a javascript method. Now, how do I pass a specific register no. via GET or POST to the python script(from Javascript)? — Joe Lewis
– Joe Lewis, Commented Jun 26, 2012 at 22:18

Marijn · Accepted Answer · 2012-06-27 07:26:17Z

2

fastest is to use jQuery and use $.post()

edited Jun 27, 2012 at 7:26

Marijn

10.6k5 gold badges62 silver badges81 bronze badges

answered Jun 26, 2012 at 21:45

cuzzea

1,51511 silver badges23 bronze badges

Sign up to request clarification or add additional context in comments.

10 Comments

Joe Lewis Over a year ago

I'm looking for the appropriate syntactical way cuzzea, I usually post data like this "myurl?var=data", but I need to know how to do that for 'url handlers'. If I get to know that, then I can use the jquery stuff.

swasheck Over a year ago

The way you're used to doing it us using the GET method.

cuzzea Over a year ago

"myurl?var=data" is GET. The post is sent in the header en.wikipedia.org/wiki/POST_(HTTP). In jQuery you can use $.post() api.jquery.com/jQuery.post and add the data as a js object {a:1,b:'c'}

swasheck Over a year ago

@cuzzea Yes, I think I am. So the real question is, "how do I submit a form using the POST method without a submit button?"

cuzzea Over a year ago

using jquery: $('#formid').submit()

|

swasheck · Accepted Answer · 2012-06-26 22:07:31Z

1

I'm not 100% sure what you're trying to do, but after several rereads here's what I think you're trying to do.

you'll need to import urllib2

#import google classes
import urllib2

class RenderMarksheet(webapp2.RequestHandler):
   def parseResponse(self, response):
        #run some code in here to parse the results since it's an HTML document ... beautifulsoup, perhaps?


   def post(self):
     regno = self.request.get('content')  
     rawlink = "http://result.annauniv.edu/cgi-bin/result/result11gr.pl?regno="  
     link = rawlink+regno 
     try:
       result = urllib2.urlopen(link)
       gpa = parseResponse(result)
     except urllib2.URLError, e:
       self.response.out.write(e)

     template_values =  {'gpa': gpa}

     self.response.out.write(template.render(templates/render.html, template_values))

This method will

Take the input from the form
Build the link
Request information from the annauniv webserver
Parse the response from that server (you're on your own parsing that, but you'd have to do it regardless)
Store the GPA a templates dictionary for use in your template

edited Jun 26, 2012 at 22:07

answered Jun 26, 2012 at 21:53

swasheck

4,7232 gold badges32 silver badges58 bronze badges

2 Comments

Joe Lewis Over a year ago

Thanks a lot swasheck, thats exactly what I'm trying to do except for one doubt. I passed the user filled reg no. via a form, and extracted the data in the script using regno = self.request.get('content'). Now,I'm trying to pass a reg-no. without using the <form> to the script. say, using a button that calls a javascript method. How do I go about this? thanks in advance.

swasheck Over a year ago

I dont understand what you mean, sorry. I thought "content" was the regno which you were going to use to get GPA information using the annauniv.edu link (handled by urllib2).

Collectives™ on Stack Overflow

How to pass data by 'POST' method to from Javascript to Python

2 Answers 2

10 Comments

2 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

10 Comments

2 Comments

Your Answer

Sign up or log in

Post as a guest

Related