What tells your browserWhile visiting web sites, uploading your files, your browser sends the so-called HTTP request, informing about what page you need, each such request contains various information necessary for connecting the browser and the website: The type of your operating room system (Windows 98/2000 / XP, etc.) and the type of browser used, this data can be used to detect vulnerabilities
Additional information collected by the Java-script you have:
This example shows a request for the progs.shtmll file in the anti directory on the server 127.0.0.23.
Environment variables that can be found in the request (the request can be changed by the proxy-server)
"Accept-Language" - Informs the remote computer about the language used by your browser. This information can be used to restrict access to resources or for other purposes.
"Referrer" - allows you to identify your interests i.e. where did you come to this resource
"Cookies" - They can contain a huge amount of information, such as e-mail, address, passwords ... All this information is in the headers of HTTP requests.
"Accept-Encoding:" - Informs the remote computer about the encoding that is being accepted by your browser.
"If-Modified-Since:" - Will download the file, if it has been changed since [date / time]"(proxy) _connection" - Connection type. "Close" and "Keep-Alive" are the two main types of connection. The first is typical for proxy servers, the second is used by browsers for direct connection. Some proxy servers support "Keep-Alive", it looks like a direct connection to the browser. The presence of the information Proxy_ (Connection), in the request indicates that it is made through a proxy server. But some websites do not establish connections without this information. In addition, some proxies themselves change the data according to their settings
"User-Agent:" - Contains information about your OS and the type of browser.
"Host:" - The requested host.
"Accept:" - Informs the remote computer about the type of information you are accessing. Each type of data corresponds to the so-called MIME type. This type is described by a set of symbols reflecting the type of data used. Here, for example, the table of types of several most frequently used types of data:
|Description of the data||File Extension||MIME type|
|Gif pictures||gif||image / gif|
|Jpeg pictures||jpeg jpg jpe||image / jpeg|
|VRML files||wrl vrml||model / vrml|
|HTML document||html htm||text / html|
|Plain text||asc txt||text / plain|
|ZIP archive||zip||application / zip|
|MS Word file||doc||application / msword|
|MS Excel file||xls||application / vnd.ms-excel|
|MS Power Point file||ppt||application / vnd.ms-powerpoint|
|Adobe Acrobat file||application / pdf|
|Flash document||swf||application / x-shockwave-flash|