http::basic_fields

A container for storing HTTP header fields.

Synopsis

Defined in header <boost/beast/http/fields.hpp>

template<
    class Allocator>
class basic_fields

Types

Name	Description
allocator_type	The type of allocator used.
const_iterator	A constant iterator to the field sequence.
iterator	A constant iterator to the field sequence.
key_compare	A strictly less predicate for comparing keys, using a case-insensitive comparison.
value_type	The type of element used to represent a field.
writer	The algorithm used to serialize the header.

Member Functions

Name	Description
at	Returns the value for a field, or throws an exception.
basic_fields [constructor]	Constructor. — Move constructor. — Copy constructor.
begin	Return a const iterator to the beginning of the field sequence.
cbegin	Return a const iterator to the beginning of the field sequence.
cend	Return a const iterator to the end of the field sequence.
clear	Remove all fields from the container.
count	Return the number of fields with the specified name.
end	Return a const iterator to the end of the field sequence.
equal_range	Returns a range of iterators to the fields with the specified name. — Returns a range of iterators to the fields with the specified name.
erase	Remove a field. — Remove all fields with the specified name.
find	Returns an iterator to the case-insensitive matching field. — Returns an iterator to the case-insensitive matching field name.
get_allocator	Return a copy of the allocator associated with the container.
insert	Insert a field. —
key_comp	Returns a copy of the key comparison function.
operator=	Move assignment. — Copy assignment.
operator[]	Returns the value for a field, or `""` if it does not exist. — Returns the value for a case-insensitive matching header, or `""` if it does not exist.
set	Set a field value, removing any other instances of that field. —
swap	Return a buffer sequence representing the trailers.
~basic_fields [destructor]	Destructor.

Protected Member Functions

Name	Description
get_chunked_impl	Returns the chunked Transfer-Encoding setting.
get_keep_alive_impl	Returns the keep-alive setting.
get_method_impl	Returns the request-method string.
get_reason_impl	Returns the response reason-phrase string.
get_target_impl	Returns the request-target string.
has_content_length_impl	Returns `true` if the Content-Length field is present.
set_chunked_impl	Adjusts the chunked Transfer-Encoding value.
set_content_length_impl	Sets or clears the Content-Length field.
set_keep_alive_impl	Adjusts the Connection field.
set_method_impl	Set or clear the method string.
set_reason_impl	Set or clear the reason string.
set_target_impl	Set or clear the target string.

Friends

Name	Description
swap	Swap two field containers.

This container is designed to store the field value pairs that make up the fields and trailers in an HTTP message. Objects of this type are iterable, with each element holding the field name and field value.

Field names are stored as-is, but comparisons are case-insensitive. The container behaves as a std::multiset; there will be a separate value for each occurrence of the same field name. When the container is iterated the fields are presented in the order of insertion, with fields having the same name following each other consecutively.

Meets the requirements of Fields

Template Parameters

Type	Description
`Allocator`	The allocator to use.