What Are HTTP Headers

HTTP headers are the backbone of the internet. They are used to identify requests by the server, which then transfers information back to the client. However, they can also be used for web scraping that allows quick data gathering from multiple sources simultaneously.

By combining web scrapers with proxies, users can gather information from targeted servers without getting blocked. With the right setup and a tactical approach, HTTP header can help all web scraping projects, and they can help you create a secure webpage.

Defining HTTP headers

But before we get into the details, we first have to explain what HTTP headers are and how they work. Their main purpose is to identify client requests and allow the server to send the details directly to the client. HTTP stands for HyperText Transfer Protocol, which is the primary method that allows the internet to work as we know it today.

Whenever you type in something in your search browser, HTTP headers identify your research and gather all related information. The data you received is structured, and all results contain the same keyword in the header. There are many different types of HTTP headers, but we’ll get back to that in a few minutes.

How HTTP headers are related to scraping

Web scraping is a process of gathering and extracting specific public information from a website, page, or application. Special web scraping tools are designed to quickly scan a multitude of websites and extract specific information very quickly. The gathered data is then transferred to an Excel sheet in a readable format.

Setting up a practical web scraping project is often easier said than done. Many websites don’t allow scrapers to access their data, so they use all kinds of defense mechanisms to prevent anyone from finding valuable data. HTTP headers can be used to help reduce the chances of being identified and blocked by specific websites. They allow you to find and extract additional content by making you appear as a random, organic user.

HTTP headers also affect the quality of data extracted. High-quality data is key for any web scraping project, especially if you’re using it to find the information you can use to improve your business. With optimized HTTP headers, you will make sure that all the data you get is relevant and can be used to get a competitive edge over other businesses.

Types of HTTP headers

There are a few different types of HTTP headers, each one designed for specific applications. Here are the most important types, along with common applications for each of them.

HTTP request header

Every time you want to find information on a website, you send out a request header from your browser. These headers send out details about who sent the request, which browser they used, and their location. HTTP headers are key for HTTP communication between the client and the servers.

After the server gets a request with all details we mentioned above, it sends the information to the client. However, if the server doesn’t recognize the client’s information, it will return information either in an HTML version or the request will be blocked completely.

HTTP response headers

As the name already suggests HTTP response headers are sent by a server as a HTTP transaction response. These headers contain information about the original request, including details about the connection type, encoding, and so on. If the request isn’t recognized, the client will get an error code. Depending on the error code, the server will find the best response possible.

General HTTP headers

General HTTP headers are read by both sides equally, but they don’t affect the content in any way. They usually display an HTTP message about the connection, cache-control, or date.

HTTP entity header

This type of header contains further information about the body of the resource. All information is presented in pairs such as Content-Length, Content-Language, and so on.

How do they improve scraping?

HTTP headers are critical for successful web scraping as they help identify specific information while minimizing the chances of getting blocked. It takes some time to optimize HTTP headers correctly, but once you do that, you will be able to access many different data sources and boost the quality of extracted data. The most common HTTP headers for web scraping are the following:

  • HTTP header User-Agent
  • HTTP header Accept-Language
  • HTTP header Accept-Encoding
  • HTTP header Accept
  • HTTP header Referer


We hope you have a better idea of what HTTP headers are and how they affect web scraping. The bottom line is that they are the key factor in all web scraping projects as they define what information is available. Ensure that you configure your HTTP request headers, and your web scraping will be far more successful.

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