CURLOPT

CURLOPT is a set of miscellaneous options for the libcurl library, a popular cross-platform library for transferring data over various network protocols. The CURLOPT options provide a way to customize the behavior of the library, allowing developers to fine-tune its behavior to meet specific needs.

CURLOPT options are specified using the CURLOPT_ prefix, followed by a name that indicates its purpose. For example, CURLOPT_RETURNTRANSFER is an option that allows libcurl to return the result of a transfer as a string instead of outputting it directly to the console. Many CURL options are related to security, such as CURLOPT_SSL_VERIFYHOST and CURLOPT_SSL_VERIFYPEER, which control authentication and verification of the peer's identity during HTTPS connections.

CURLOPT options are typically used when initializing a libcurl session, either by setting them using the curl_easy_setopt function or by passing them as arguments to the curl_easy_init function when creating a new session. Some CURL options can also be set when making specific requests, such as the curl_easy_init function for HTTPS connections.

The CURL API is widely used in many programming languages, including C, C++, Java, and others. It is commonly used for REST APIs, FTP, and SFTP protocols. While libcurl provides a comprehensive set of features for working with network protocols, many applications may use CURL options to cater to specific requirements or security best practices.

Overall, CURLOPT options provide developers with the flexibility to use libcurl in a variety of ways, taking into account the particular demands of their projects. The options are written in 'CURL_OFF_T', which provides the infrastructure for helper functions and macros. The developers can use various tools such as OpenSSL library and лаунчерcurl to set CURLOPT options.