Stories from the Web Crawling trenches in authentication

Using Proxies with Python Requests

Author: Mohan Ganesan

Date: Oct 22, 2023

Python requests library simplifies HTTP requests and API calls. Proxies help avoid IP blocking. Configure proxies using a dictionary or environment variables. Authenticate requests with credentials. Use sessions for persistent data. Disable SSL verification if trusted. Adjust timeouts and retries for robust requests.

How to Authenticate with Bearer Tokens in Python Requests

Author: Mohan Ganesan

Date: Feb 3, 2024

Bearer tokens are used for authentication in APIs. This article explains how to make authenticated requests with bearer tokens in Python using the Requests module.

Authenticating Python Requests: A Practical Guide to Using Tokens for API Access

Author: Mohan Ganesan

Date: Dec 6, 2023

API tokens are critical for securing web APIs. Learn how to obtain and use tokens for authenticated API calls in Python, and troubleshoot common token-related issues.

Troubleshooting 403 Errors when Web Scraping in Python Requests

Author: Mohan Ganesan

Date: Dec 6, 2023

Learn how to troubleshoot and prevent 403 Forbidden errors in web scraping. Understand common causes, diagnose the root cause, and implement solutions using Python. Use techniques like retrying requests, analyzing HTTP traffic, simplifying requests, and verifying authentication. Prevent future errors by using proxies, randomizing user agents, solving CAPTCHAs, and throttling requests. Consider using a professional proxy service like Proxies API for large-scale scraping.

Accessing URLs Requiring Authentication with Python's urllib

Author: Mohan Ganesan

Date: Feb 6, 2024

Python's urllib module provides a simple way to supply credentials and access protected resources. It handles basic auth automatically and can be used for accessing APIs, pulling reports, and scraping data from websites.

Using Proxies in file_get_contents in PHP in 2024

Author: Mohan Ganesan

Date: Jan 9, 2024

Proxying web requests in PHP using stream_context_create and file_get_contents. Adding authentication for secure proxies. Advanced HTTP options through stream contexts. Debugging common PHP proxy problems. Scraping via cURL. Leveraging Proxy-as-a-Service for robust web scraping with Proxies API.

How to Use Proxies with Puppeteer in 2024

Author: Mohan Ganesan

Date: Jan 9, 2024

Learn how to effectively use proxies with Puppeteer for web scraping, including the importance of proxies, configuring proxies in Puppeteer, rotating multiple proxies to avoid blocks, configuring authentication for premium proxies, and advanced proxy chaining. Discover common issues and troubleshooting tips, as well as criteria for selecting proxy services. Consider leveraging Proxies API for uninterrupted web scraping with worldwide locations, built-in rotation, JavaScript rendering, CAPTCHA solving, and high availability.

Mastering Sessions Cookies with Python Requests

Author: Mohan Ganesan

Date: Oct 22, 2023

Cookies and sessions are essential for effective web scraping. Python's Requests library makes it easy to leverage sessions and cookies for robust scraping. Learn how to create a session, persist cookies, set custom cookies, and more. By mastering session techniques, you can scrape complex sites requiring authentication and state management.

Making HTTP Requests Through a Proxy in Elixir with HTTPoison in 2024

Author: Mohan Ganesan

Date: Jan 9, 2024

Learn how to install HTTPoison in Elixir, make requests, configure global and per-request proxies, use SOCKS proxies, handle authentication and TLS, and manage IP blocks and captchas with proxy rotation services.

Using Rotating Proxies in rvest in 2024

Author: Mohan Ganesan

Date: Jan 9, 2024

Configuring proxies in rvest for web scraping. Learn how to set up proxies, rotate them dynamically, and implement best practices for optimal performance.

Demystifying Authentication with Python Requests

Author: Mohan Ganesan

Date: Oct 22, 2023

Authentication can be tricky when working with APIs and web scraping. Python Requests provides various authentication schemes like basic, token-based, and digest authentication to make it easier. Understand the available auth classes and implement them properly to seamlessly integrate authentication into your Python scripts and apps.

Accessing OAuth2 APIs with Python Requests

Author: Mohan Ganesan

Date: Feb 3, 2024

Python's Requests library provides an easy way to handle OAuth2 authentication and access protected resources from an API. It covers obtaining and refreshing access tokens programmatically.

Using Proxies With C++ httplib in 2024

Author: Mohan Ganesan

Date: Jan 9, 2024

Using a proxy with C++ httplib is easy. Set up authentication, chain multiple proxies, customize settings, and troubleshoot issues. Proxies API offers a better solution for unblockable scraping.

Controlling HTTP Requests with urllib Headers

Author: Mohan Ganesan

Date: Feb 6, 2024

The Python urllib module provides a powerful way to make HTTP requests in your code. Headers allow you to specify important metadata about the request, like the user agent, authentication credentials, caching settings, and more.

Persistent Headers for Slick Web Scraping with Python Requests Sessions

Author: Mohan Ganesan

Date: Oct 22, 2023

HTTP headers are essential for web scraping. Request sessions and default headers make scraping easier. Authentication and header order are important. Learn to debug and use advanced scraping patterns.

Configuring Headers with aiohttp Clients for Effective API Calls

Author: Mohan Ganesan

Date: Feb 22, 2024

Properly configuring headers in aiohttp is crucial for smooth API requests. Headers serve purposes like authentication, context, security, and caching.

Making Secure HTTP Requests in Python

Author: Mohan Ganesan

Date: Feb 3, 2024

Python requests library makes HTTPS requests simple and secure, providing easy syntax, encryption, validation, and access to response data.

HttpWebRequest Proxies in C# in 2024

Author: Mohan Ganesan

Date: Jan 9, 2024

The article explains how to direct HttpWebRequest traffic through a proxy using the WebProxy class. It covers creating a WebProxy, assigning it to HttpWebRequest, proxy authentication, default system proxy settings, and making requests via proxy.

Troubleshooting Python Requests Returning HTML Instead of JSON

Author: Mohan Ganesan

Date: Feb 3, 2024

When working with APIs in Python, it is important to handle authentication, set the Accept header, and monitor for HTML responses to ensure JSON data is returned.

Mastering Urllib Sessions in Python for Effective Web Scraping

Author: Mohan Ganesan

Date: Feb 8, 2024

Urllib sessions allow persisting specific parameters across multiple requests. This is very useful for web scraping authenticated sites or sites that track browser state.

Troubleshooting Python Requests Through a Proxy

Author: Mohan Ganesan

Date: Feb 3, 2024

Common problems and solutions when sending requests through a proxy server in Python code.

Simplify OAuth Authentication in Python with httpx-oauth

Author: Mohan Ganesan

Date: Feb 5, 2024

Authenticating with OAuth in Python can be tedious. httpx-oauth simplifies the process by providing a unified API for different OAuth providers and handling token management, refreshing, and storage.

Persisting Cookies from Initial Request in Python Requests

Author: Mohan Ganesan

Date: Feb 3, 2024

Save and re-use cookies in Python requests. Use cookies for session state and authentication. Save cookies to variable or use a session for automatic cookie persistence.

Handling Client Errors with aiohttp

Author: Mohan Ganesan

Date: Feb 22, 2024

When building applications with aiohttp, it is important to handle client errors properly. Use the ClientResponseError exception and status code to identify client errors and implement custom error handling logic for expected cases.

Authenticating Requests Through a Proxy with Digest Auth in Python

Author: Mohan Ganesan

Date: Feb 3, 2024

Configure Python Requests module to handle proxy and digest authentication for secure access through authenticated proxy.

Using AFNetworking Proxies for Web Scraping in 2024

Author: Mohan Ganesan

Date: Jan 9, 2024

Setting up a basic AFNetworking proxy, working with different proxy protocols, advanced proxy functionality, troubleshooting common AFNetworking proxy problems.

Why use Python requests?

Author: Mohan Ganesan

Date: Feb 20, 2024

The Requests library is a popular tool for Python developers to make HTTP requests and APIs easier. It saves time compared to urllib module and provides features like JSON decoding and SSL verification. Requests is recommended for web API calls, web scraping, and more.

Python: The Go-To Language for Web Scraping

Author: Mohan Ganesan

Date: Feb 20, 2024

Web scraping with Python: learn why Python is the go-to language, its advantages, popular libraries, handling complex websites, and best practices.

Accessing Protected Resources with urllib and Realm Authentication

Author: Mohan Ganesan

Date: Feb 8, 2024

Access protected web resources in Python using urllib and realm-based authentication with HTTPPasswordMgrWithDefaultRealm and HTTPBasicAuthHandler.

Speed Up Python Requests with Caching

Author: Mohan Ganesan

Date: Feb 3, 2024

HTTP requests in Python using requests library can be faster due to caching. Caching avoids unnecessary work and streamlines data retrieval workflows.

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