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How to use post method in urllib3.

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by l.rohitharohitha2001@gmail.com dot icon Updated: Nov 13, 2023

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Urllib3 is a powerful Python library for making HTTP requests. It provides a higher-level abstraction over the standard urllib library and offers features. 

This makes it a reliable choice for interacting with web resources. The library also supports handling query parameters, headers, and cookies. One of its standout features is connection pooling, which allows you to reuse. Especially when making multiple requests to the same host.  

  

Tips for using urllib3:  

  • Print the Response Status Code: Print the status code to assess if the request was successful or encountered an error.  
  • Print the Response Data: Output the response data to examine the content returned. This is particularly helpful for inspecting the structure and identifying any unexpected data.  
  • Print Headers for Additional Information: Print the response headers to gather additional information. This includes server's behavior, content type, and any specific header details.  
  • Handle Exceptions and Print Tracebacks: Wrap your request code in a try-except block. This helps identify issues like network errors or malformed URLs.  
  • Increase Verbosity for Detailed Logging: Set the urllib3 library's log level to DEBUG. This can provide insights into the underlying HTTP communication.  

  

In conclusion, utilizing urllib3 to access web resources offers a range of benefits. Its ease of use and higher-level abstraction over the standard urllib library. The ability to handle various HTTP methods and manage connections with connection pooling. The ability to print response data, status codes, and headers facilitates the identification.  

Fig: Preview of the output that you will get on running this code from your IDE.

Code

In this solution we are using Urllib 3 library of Python.

How to scrap page with POST method with Python?

PythondotLines of Code : 41dotLicense : Strong Copyleft (CC BY-SA 4.0)

Dependent Libraries : 
import pandas as pd

df = pd.read_html(
    "https://heavens-above.com/StarlinkLaunchPasses.aspx?lat=50&lng=12&loc=Somewhere")[0]

print(df)

import requests
from bs4 import BeautifulSoup
import pandas as pd
import re


def Main(url):
    with requests.Session() as req:
        r = req.get(url)
        soup = BeautifulSoup(r.content, 'html.parser')
        times = [item.get("value") for item in soup.findAll(
            "option", value=re.compile(r"\d{6}"))]
        vs = soup.find("input", id="__VIEWSTATE").get("value")
        vsg = soup.find("input", id="__VIEWSTATEGENERATOR").get("value")
        ut = soup.find("input", id="ctl00_cph1_hidStartUtc").get("value")
        for time in times:
            data = {
                '__EVENTTARGET': 'ctl00$cph1$ddlLaunches',
                '__EVENTARGUMENT': '',
                '__LASTFOCUS': '',
                '__VIEWSTATE': vs,
                '__VIEWSTATEGENERATOR': vsg,
                'utcOffset': '0',
                'ctl00$ddlCulture': 'en',
                'ctl00$cph1$hidStartUtc': ut,
                'ctl00$cph1$ddlLaunches': time
            }
            r = req.post(url, data=data)
            df = pd.read_html(r.content)[0]
            df.to_csv(f"{time}.csv", index=False)


Main("https://heavens-above.com/StarlinkLaunchPasses.aspx?lat=50&lng=12&loc=Somewhere")

Instructions


Follow the steps carefully to get the output easily.


  1. Download and Install the Jupyter Notebook on your computer.
  2. Open the terminal and install the required libraries with the following commands.
  3. Create a new Python file on your Notebook.
  4. Copy the snippet using the 'copy' button and paste it into your Python.
  5. Run the current file to generate the output.


I hope you found this useful.


I found this code snippet by searching for 'How to Scrap Page with POST method with Python?' in Kandi. You can try any such use case!

Environment Tested


I tested this solution in the following versions. Be mindful of changes when working with other versions.

  1. Jupyter Notebook (anaconda 3) 6.0.1 Version
  2. The solution is created in Python 3.8 Version
  3. urllib 3 2.0.7 Version.


Using this solution, we can be able to use use post method in urllib3 with simple steps. This process also facilities an easy way to use, hassle-free method to create a hands-on working version of code which would help us to use post method in urllib3.

Dependent Library


urllib3by urllib3

Python doticonstar image 3420 doticonVersion:2.0.3doticon
License: Permissive (MIT)

urllib3 is a user-friendly HTTP client library for Python

Support
    Quality
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          Reuse

            urllib3by urllib3

            Python doticon star image 3420 doticonVersion:2.0.3doticon License: Permissive (MIT)

            urllib3 is a user-friendly HTTP client library for Python
            Support
              Quality
                Security
                  License
                    Reuse

                      You can search for any dependent library on kandi like 'urllib3'.

                      FAQ:

                      1. What is Python urllib3, and what is its purpose?   

                      Python urllib3 is a powerful library that provides tools for making HTTP requests. Its primary purpose is to simplify the process of interacting with web resources.  

                      • HTTP Request Handling  
                      • Connection Pooling  
                      • Retry and Timeout Support  
                      • SSL/TLS Security  
                      • Authentication.  

                        

                      2. How does the higher-level HTTP client interface in Python urllib3 work?   

                      The higher-level HTTP client interface in Python urllib3 is the HTTP process. It provides a more abstract interface compared to the lower-level urllib library.  

                          

                      3. How do I install Python urllib3 using a package manager?  

                      Python urllib3 is a part of the standard library in Python, so you do not need to install it. If you want to ensure you have the latest version or if you are working in a virtual environment. It can be using a package manager like pip to install or upgrade urllib3.  

                        

                      4. What are some common use cases for sending an HTTP POST request?  

                       HTTP POST requests are commonly used in various scenarios where data is sent to a server.  

                      • Form Submissions  
                      • API Requests  
                      • Uploading Files  
                      • Data Submissions in RESTful APIs  
                      • Authentication  
                      • Data Processing and Handling  
                      • Payment Processing  
                      • User Registration  
                      • Sending JSON Data.  

                        

                      5. How does an HTTP server handle requests sent by urlilb3 clients?   

                      Urllib3 clients send HTTP requests to a server, and it processes these requests.  

                      • Listening for Requests  
                      • Connection Establishment  
                      • Receiving the Request  
                      • Request Processing  
                      • Handling Resources  
                      • Generating a Response  
                      • Sending the Response. 

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