Exploring the HyperText Transport Protocol You are to retrieve the following document using the HTTP protocol in a way that you can examine the HTTP Response headers. http://data.pr4e.org/intro-short.txt There are three ways that you might retrieve this web page and look at the response headers: Preferred: Modify the socket1.py program to retrie…

py4e_ex_12

import socket

mysock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
mysock.connect(('data.pr4e.org', 80))
cmd = 'GET http://data.pr4e.org/intro-short.txt HTTP/1.0\r\n\r\n'.encode()
mysock.send(cmd)

while True:
    data = mysock.recv(512)
    if (len(data) < 1):
        break
    print(data.decode())
mysock.close()

can anyone tell the exact steps to do this assignment coz i am having doubt n plz leme know how to open the developer console . revert asap

can anyone tell the exact steps to do this assignment coz i am having doubt n plz leme know how to open the developer console . revert asap

Hi there
as you open your assignment you are provided with two links

open both the tabs on your browser
copy the code from the socket tab and paste it in your text editor
in the code > look for the get function and change HTTP URL and paste the given URL they gave you in assignment
run your code and you can find your answers there

can anyone tell the exact steps to do this assignment coz i am having doubt n plz leme know how to open the developer console . revert asap

Hi there
as you open your assignment you are provided with two links

open both the tabs on your browser
copy the code from the socket tab and paste it in your text editor
in the code > look for the get function and change HTTP URL and paste the given URL they gave you in assignment
run your code and you can find your answers there

Thanks for this Suggestion...It helped me..

i followed this process but got a traceback in line 1 and line 3

i followed this process but got a traceback in line 1 and line 3

yes, even i got the same problem
can someone solve the issue??

just copy the code given by dr. Chuck, and replace the URL next to GET with the URL of the text that we need to analize.

Or just use the java developer view from your chrome navigator and copy the values.

Last-Modified:
Sat, 13 May 2017 11:22:22 GMT

ETag:
1d3-54f6609240717

Content-Length:
467

Cache-Control:
max-age=0, no-cache, no-store, must-revalidate

Content-Type:
text/plain

just copy the code given by dr. Chuck, and replace the URL next to GET with the URL of the text that we need to analize.

Or just use the java developer view from your chrome navigator and copy the values.

can you please tell me exactly how to run command prompt in windows 10 as windows does not provide telnet by default, we have to enable it manually. I want the steps of what to write in command promt.

if u want to run this program on cmd go to the folder where the file is located and open cmd from that folder by clicking on adress bar and typing cmd there.Then run that program by python "name of your file".py.
That should do.

Can someone tell me why is it showing "Bad Request"?

You have to copy-paste the code, in my case i'am using visual studio Code and then you change when says GET and put the link that is in your assignament just like this and put the answers:)

if u want to run this program on cmd go to the folder where the file is located and open cmd from that folder by clicking on adress bar and typing cmd there.Then run that program by python "name of your file".py.
That should do.
C:\Users\User\PycharmProjects\pythonProject>python socket.py
C:\Users\User\PycharmProjects\pythonProject>py socket.py
Traceback (most recent call last):
File "socket.py", line 1, in
import socket
File "C:\Users\User\PycharmProjects\pythonProject\socket.py", line 3, in
mysock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
AttributeError: partially initialized module 'socket' has no attribute 'AF_INET' (most likely due to a circular import)

i am getting this error if i am following these steps and if i am writing 'telnet data.pr4e.org 80' then pasting the URL given in the assignment it is showing:
HTTP/1.1 400 Bad Request
Date: Sat, 31 Oct 2020 18:45:33 GMT
Server: Apache/2.4.18 (Ubuntu)
Content-Length: 308
Connection: close
Content-Type: text/html; charset=iso-8859-1

                                              <html><head>
                                                          <title>400 Bad Request</title>
                                                                                        </head><body>
                                                                                                     <h1>Bad Request</h1>
 <p>Your browser sent a request that this server could not understand.<br />
                                                                            </p>
                                                                                <hr>
                                                                                    <address>Apache/2.4.18 (Ubuntu) Server at do1.dr-chuck.com Port 80</address>
                                        </body></html>

Connection to host lost.

please help me.

i followed this process but got a traceback in line 1 and line 3

The same here. Have you found what was causing these tracebacks?

Last-Modified:
Sat, 13 May 2017 11:22:22 GMT
ETag:
1d3-54f6609240717
Content-Length:
467
Cache-Control:
max-age=0, no-cache, no-store, must-revalidate
Content-Type:
text/plain

This is working.

Last-Modified:
Sat, 13 May 2017 11:22:22 GMT
ETag:
1d3-54f6609240717
Content-Length:
467
Cache-Control:
max-age=0, no-cache, no-store, must-revalidate
Content-Type:
text/plain

This is working.

THIS IS WORKING:
Last-Modified:
Sat, 13 May 2017 11:22:22 GMT
ETag:
1d3-54f6609240717
Content-Length:
467
Cache-Control:
max-age=0, no-cache, no-store, must-revalidate
Content-Type:
text/plain

![Error](https://user-images.githubusercontent.com/89157542/132367328-d2420673-fed3-4f9a-8366-6e56374accf8.PNG
can you help me?

Server: Apache/2.4.18 (Ubuntu)
Last-Modified: Sat, 13 May 2017 11:22:22 GMT
ETag: "1d3-54f6609240717"
Accept-Ranges: bytes
Content-Length: 467
Cache-Control: max-age=0, no-cache, no-store, must-revalidate
Pragma: no-cache
Expires: Wed, 11 Jan 1984 05:00:00 GMT
Connection: close
Content-Type: text/plain

thank you

This is very simple. First, put the code inside pycharm, you need only change the - Preferred: Modify the [socket1.py]
The code given in coursera:

Code in Pycharm:

Then RUN, you will get the answer for the task.

wonderful!

what is cache control??

If you run the code in what ever IDE (Pycharm for example) you are using you will see:

Last-Modified: Sat, 13 May 2017 11:22:22 GMT
ETag: "1d3-54f6609240717"
Accept-Ranges: bytes
Content-Length: 467
Cache-Control: max-age=0, no-cache, no-store, must-revalidate
Pragma: no-cache
Expires: Wed, 11 Jan 1984 05:00:00 GMT
Connection: close
Content-Type: text/plain

Why should you learn to write programs?

Writing programs (or programming) is a very creative
and rewarding activity. You can write programs for
many reasons, ranging from making your living to solving
a difficult data analysis problem to having fun to helping
someone else solve a problem. This book assumes that
everyone needs to know how to program, and that once
you know how to program you will figure out what you want
to do with your newfound skills.

Process finished with exit code 0

Ensure you are highlighting the code if you have not saved it otherwise it will exit with a code 0

This is very simple. First, put the code inside pycharm, you need only change the - Preferred: Modify the [socket1.py] The code given in coursera:

Code in Pycharm:

Then RUN, you will get the answer for the task.

Hi. With the same code running in Bracket text editor I am getting error in cmd. Can anyone please help

1. save it as newsocket.py in any other directory, not in which you're currently working.
2. problem
   

solution