شرح برنامج سكريمنج فروج - ٤ : تعلم سيو بالعربي : نديم حدادين

Summary

The video script discusses the basics of web crawling, emphasizing the importance of respecting server limits to avoid being blocked or causing server downtime. It advises on ethical practices, such as not overloading competitors' sites, and highlights the role of server administrators in setting crawling limits. The script also covers technical aspects like setting maximum requests per second and the impact of device specifications on crawling capabilities.

Takeaways

• 🛠️ The script discusses the basics of using web crawlers, emphasizing the importance of understanding the rules and limits before starting to crawl a website.
• ⚠️ It mentions the potential risks of web crawling, such as server overload and the possibility of being blocked or causing the server to go down.
• 🔍 The speaker explains the need to respect the website's robots.txt file, which dictates which pages are allowed or disallowed for crawling.
• 🚀 The speed of crawling is highlighted, with the possibility of instructing a script to crawl multiple links per second, but cautioning against the potential negative impacts.
• 💡 The concept of 'max threads per second' is introduced, indicating the maximum number of requests that can be made in a second without causing issues.
• 🔢 The importance of calculating the right number of threads per second based on the server's capacity and the rules provided by the web administrators is emphasized.
• 💻 The role of the device's specifications in determining the number of requests that can be made is discussed, noting that more powerful devices can handle more requests.
• 📈 The speaker advises against unethical practices such as DDoS attacks or web scraping of competitors' sites, which can lead to legal and ethical issues.
• 🤖 The use of 'speed' and 'max threads per second' settings in crawler configurations is explained, and the need to find a balance to avoid server issues is stressed.
• 🔒 The potential consequences of IP blocking are mentioned, including the impact on the entire company if one employee's actions lead to an IP block.
• 🔑 The script concludes with the importance of ethical web crawling practices and the need to understand and respect the technical and ethical boundaries of web scraping.

Q & A

What is the basic concept of web crawling mentioned in the script?

The script discusses the fundamental concept of web crawling, which involves directing a bot to navigate from one page to another, identifying which pages are allowed to be accessed and which are not.

What is the potential risk of web crawling at a high speed?

High-speed web crawling can put pressure on the server, potentially leading to a server block or the server going down, which could result in the user receiving a 503 HTTP status code.

Why is it important to know the server's crawling rate limits?

Knowing the server's crawling rate limits is crucial to avoid overloading the server with too many requests per second, which can lead to being blocked or causing the server to crash.

What does the script suggest to do before starting web crawling on a website?

The script suggests contacting the website's infrastructure team or server administrators to ask about the allowed number of requests per minute or second to avoid causing harm to the server.

What is the term 'Max YOER per second' referring to in the context of the script?

The term 'Max YOER per second' refers to the maximum number of requests per second that a user is allowed to make while web crawling, as set by the server administrators.

How can the specifications of the user's device affect web crawling?

The specifications of the user's device can significantly impact the number of requests that can be made per second. A device with higher capabilities may be able to handle more requests without causing issues.

What is the ethical consideration mentioned regarding web crawling on competitors' websites?

The script mentions that web crawling on competitors' websites for unethical purposes is not advised. It is important to understand the potential consequences and act responsibly.

What does the script suggest to avoid when web crawling on a website?

The script suggests avoiding rapid web crawling that could cause the website to go down. It is recommended to use a speed that is within the limits set by the server administrators.

What is the potential consequence of not respecting the server's crawling limits?

Not respecting the server's crawling limits can result in the user's IP being blocked, affecting all employees of the company if the block is applied to the entire IP range.

Why is it important to differentiate between 'Max YOER' and 'Max RPS' in web crawling?

Differentiating between 'Max YOER' (requests per second) and 'Max RPS' (requests per second) is important to ensure that the web crawling is conducted within the allowed limits and to optimize the crawling process effectively.

What is the purpose of using both 'Max' and 'YOER' in web crawling configuration?

Using both 'Max' and 'YOER' in web crawling configuration helps to reach the allowed limit set by the server, such as 100 requests per minute, by mixing the two settings to find the optimal crawling rate.