class HTTP::Server::Response

Overview

The response to configure and write to in an HTTP::Server handler.

The response #status and #headers must be configured before writing the response body. Once response output is written, changing the #status and #headers properties has no effect.

The HTTP::Server::Response is a write-only IO, so all IO methods are available in it.

A response can be upgraded with the #upgrade method. Once invoked, headers are written and the connection IO (a socket) is yielded to the given block. This is useful to implement protocol upgrades, such as websockets.

Defined in:

http/server/response.cr

Instance Method Summary

Instance methods inherited from class IO

<<(obj) : self <<, close close, closed? : Bool closed?, each_byte(&) : Nil
each_byte each_byte, each_char(&) : Nil
each_char each_char, each_line(*args, **options, &block : String -> ) : Nil
each_line(*args, **options) each_line, encoding : String encoding, flush flush, getb_to_end : Bytes getb_to_end, gets(limit : Int, chomp = false) : String | Nil
gets(delimiter : Char, limit : Int, chomp = false) : String | Nil
gets(delimiter : Char, chomp = false) : String | Nil
gets(delimiter : String, chomp = false) : String | Nil
gets(chomp = true) : String | Nil gets, gets_to_end : String gets_to_end, peek : Bytes | Nil peek, pos pos, pos=(value) pos=, print(obj : _) : Nil
print(*objects : _) : Nil print, printf(format_string, args : Array | Tuple) : Nil
printf(format_string, *args) : Nil printf, puts(string : String) : Nil
puts(obj : _) : Nil
puts : Nil
puts(*objects : _) : Nil puts, read(slice : Bytes) read, read_at(offset, bytesize, & : IO -> ) read_at, read_byte : UInt8 | Nil read_byte, read_bytes(type, format : IO::ByteFormat = IO::ByteFormat::SystemEndian) read_bytes, read_char : Char | Nil read_char, read_fully(slice : Bytes) : Int32 read_fully, read_fully?(slice : Bytes) : Int32 | Nil read_fully?, read_line(*args, **options) : String read_line, read_string(bytesize : Int) : String read_string, read_utf8(slice : Bytes) read_utf8, read_utf8_byte : UInt8 | Nil read_utf8_byte, rewind rewind, seek(offset, whence : Seek = Seek::Set) seek, set_encoding(encoding : String, invalid : Symbol | Nil = nil) : Nil set_encoding, skip(bytes_count : Int) : Nil skip, skip_to_end : Nil skip_to_end, tell tell, tty? : Bool tty?, write(slice : Bytes) : Nil write, write_byte(byte : UInt8) : Nil write_byte, write_bytes(object, format : IO::ByteFormat = IO::ByteFormat::SystemEndian) : Nil write_bytes, write_string(slice : Bytes) : Nil write_string, write_utf8(slice : Bytes) : Nil write_utf8

Class methods inherited from class IO

copy(src, dst, limit : Int) : Int64
copy(src, dst) : Int64 copy, pipe(read_blocking = false, write_blocking = false) : Tuple(IO::FileDescriptor, IO::FileDescriptor)
pipe(read_blocking = false, write_blocking = false, &) pipe, same_content?(stream1 : IO, stream2 : IO) : Bool same_content?

Instance methods inherited from class Reference

==(other : self)
==(other : JSON::Any)
==(other : YAML::Any)
==(other) ==, dup dup, hash(hasher) hash, initialize initialize, inspect(io : IO) : Nil inspect, object_id : UInt64 object_id, pretty_print(pp) : Nil pretty_print, same?(other : Reference) : Bool
same?(other : Nil) same?, to_s(io : IO) : Nil to_s

Constructor methods inherited from class Reference

new new, unsafe_construct(address : Pointer, *args, **opts) : self unsafe_construct

Class methods inherited from class Reference

pre_initialize(address : Pointer) pre_initialize

Instance methods inherited from class Object

! : Bool !, !=(other) !=, !~(other) !~, ==(other) ==, ===(other : JSON::Any)
===(other : YAML::Any)
===(other) ===, =~(other) =~, as(type : Class) as, as?(type : Class) as?, class class, dup dup, hash(hasher)
hash hash, in?(collection : Object) : Bool
in?(*values : Object) : Bool in?, inspect(io : IO) : Nil
inspect : String inspect, is_a?(type : Class) : Bool is_a?, itself itself, nil? : Bool nil?, not_nil!(message)
not_nil! not_nil!, pretty_inspect(width = 79, newline = "\n", indent = 0) : String pretty_inspect, pretty_print(pp : PrettyPrint) : Nil pretty_print, responds_to?(name : Symbol) : Bool responds_to?, tap(&) tap, to_json(io : IO) : Nil
to_json : String to_json, to_pretty_json(indent : String = " ") : String
to_pretty_json(io : IO, indent : String = " ") : Nil to_pretty_json, to_s(io : IO) : Nil
to_s : String to_s, to_yaml(io : IO) : Nil
to_yaml : String to_yaml, try(&) try, unsafe_as(type : T.class) forall T unsafe_as

Class methods inherited from class Object

from_json(string_or_io, root : String)
from_json(string_or_io) from_json, from_yaml(string_or_io : String | IO) from_yaml

Macros inherited from class Object

class_getter(*names, &block) class_getter, class_getter!(*names) class_getter!, class_getter?(*names, &block) class_getter?, class_property(*names, &block) class_property, class_property!(*names) class_property!, class_property?(*names, &block) class_property?, class_setter(*names) class_setter, def_clone def_clone, def_equals(*fields) def_equals, def_equals_and_hash(*fields) def_equals_and_hash, def_hash(*fields) def_hash, delegate(*methods, to object) delegate, forward_missing_to(delegate) forward_missing_to, getter(*names, &block) getter, getter!(*names) getter!, getter?(*names, &block) getter?, property(*names, &block) property, property!(*names) property!, property?(*names, &block) property?, setter(*names) setter

Instance Method Detail

def close : Nil #

Closes this response, writing headers and body if not done yet. This method must be implemented if wrapping the response output.


[View source]
def closed? : Bool #

Returns true if this response has been closed.


[View source]
def content_length=(content_length : Int) #

Convenience method to set the Content-Length header.


[View source]
def content_type=(content_type : String) #

Convenience method to set the Content-Type header.


[View source]
def cookies : HTTP::Cookies #

Convenience method to set cookies, see HTTP::Cookies.


[View source]
def flush : Nil #

Flushes the output. This method must be implemented if wrapping the response output.


[View source]
def headers : HTTP::Headers #

The response headers (HTTP::Headers). These must be set before writing to the response.


[View source]
def output : IO #

The IO to which output is written. This can be changed/wrapped to filter the response body (for example to compress the output).


[View source]
def output=(output : IO) #

The IO to which output is written. This can be changed/wrapped to filter the response body (for example to compress the output).


[View source]
def redirect(location : String | URI, status : HTTP::Status = :found) #

Sends a redirect to location.

The value of location gets encoded with URI.encode.

The status determines the HTTP status code which can be HTTP::Status::FOUND (302) for a temporary redirect or HTTP::Status::MOVED_PERMANENTLY (301) for a permanent redirect.

The response gets closed.

Raises IO::Error if the response is closed or headers were already sent.


[View source]
def respond_with_status(status : HTTP::Status, message : String | Nil = nil) : Nil #

Sends status and message as response.

This method calls #reset to remove any previous settings and writes the given status and message to the response IO. Finally, it closes the response.

If message is nil, the default message for status is used provided by HTTP::Status#description.

Raises IO::Error if the response is closed or headers were already sent.


[View source]
def respond_with_status(status : Int, message : String | Nil = nil) : Nil #

Sends status and message as response.

This method calls #reset to remove any previous settings and writes the given status and message to the response IO. Finally, it closes the response.

If message is nil, the default message for status is used provided by HTTP::Status#description.

Raises IO::Error if the response is closed or headers were already sent.


[View source]
def status : HTTP::Status #

The status code of this response, which must be set before writing the response body. If not set, the default value is 200 (OK).


[View source]
def status=(status : HTTP::Status) #

[View source]
def status_code : Int32 #

Convenience method to retrieve the HTTP status code.


[View source]
def status_code=(status_code : Int32) #

Convenience method to set the HTTP status code.


[View source]
def status_message : String | Nil #

Returns the status message.

Defaults to description of #status.


[View source]
def status_message=(status_message : String | Nil) #

Sets the status message.


[View source]
def upgrade(&block : IO -> ) : Nil #

Upgrades this response, writing headers and yielding the connection IO (a socket) to the given block. This is useful to implement protocol upgrades, such as websockets.


[View source]
def version : String #

The version of the HTTP::Request that created this response.


[View source]
def write(slice : Bytes) : Nil #

See IO#write(slice).


[View source]