http_header_set_format() function

The header

The key

The format

Add a key-value pair of http header to the list, note that with value = NULL, this function will remove the header with `key` already exists in the list.

Cleanup and free all http header pairs

Cleanup with http_header_clean and destroy http header handle object

Remove the header with key from the headers list

Get a value of header in header list The address of the value will be assign set to `value` parameter or NULL if no header with the key exists in the list

Create HTTP header string from the header with index, output string to buffer with buffer_len Also return the last index of header was generated