Web scrape troubleshooting
list of technical issues
- Content of web page was changed (revision): Th expected web content (of specified DOM element) became empty.
- Multiple sources of same column such as different HTML DOM but have the same column value.
- Backup the HTML text of parent DOM element
- (optional) Complete HTML file backup
- The IP was banned from server
- Setting the temporization (sleep time) between each request ex: PHP: sleep - Manual, AutoThrottle extension — Scrapy 1.0.3 documentation
- The server responded with a status of 403: '403 forbidden' --> Change the network IP
- The web page needed to signed in
- Stateless: Why say that HTTP is a stateless protocol? - Stack Overflow
- Stateful: What is stateful? Webopedia Definition
- List of HTTP status codes - Wikipedia