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. The block must invoke #close afterwards, the server won't do it in this case. 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? 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, gets(delimiter : Char, limit : Int, chomp = false) : String?
gets(delimiter : Char, chomp = false) : String?
gets(chomp = true) : String?
gets(limit : Int, chomp = false) : String?
gets(delimiter : String, chomp = false) : String?
gets
, gets_to_end : String gets_to_end, peek : Bytes? peek, pos pos, pos=(value) pos=, print(*objects : _) : Nil
print(obj) : Nil
print
, printf(format_string, *args) : Nil
printf(format_string, args : Array | Tuple) : Nil
printf
, puts(*objects : _) : Nil
puts : Nil
puts(obj) : Nil
puts(string : String) : Nil
puts
, read(slice : Bytes) read, read_at(offset, bytesize, &) read_at, read_byte : UInt8? read_byte, read_bytes(type, format : IO::ByteFormat = IO::ByteFormat::SystemEndian) read_bytes, read_char : Char? read_char, read_fully(slice : Bytes) read_fully, read_fully?(slice : Bytes) 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 read_utf8_byte, rewind rewind, seek(offset, whence : Seek = Seek::Set) seek, set_encoding(encoding : String, invalid : Symbol? = 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) write_byte, write_bytes(object, format : IO::ByteFormat = IO::ByteFormat::SystemEndian) write_bytes, write_utf8(slice : Bytes) write_utf8

Class methods inherited from class IO

copy(src, dst, limit : Int) : UInt64
copy(src, dst) : UInt64
copy
, pipe(read_blocking = false, write_blocking = false) : Tuple(IO::FileDescriptor, IO::FileDescriptor)
pipe(read_blocking = false, write_blocking = false, &)
pipe

Instance methods inherited from class Reference

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

Constructor methods inherited from class Reference

new new

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
hash(hasher)
hash
, inspect(io : IO) : Nil
inspect : String
inspect
, is_a?(type : Class) : Bool is_a?, itself itself, nil? : Bool nil?, 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)
to_json
to_json
, to_pretty_json(indent : String = " ")
to_pretty_json(io : IO, indent : String = " ")
to_pretty_json
, to_s : String
to_s(io : IO) : Nil
to_s
, to_yaml(io : IO)
to_yaml
to_yaml
, try(&) try, unsafe_as(type : T.class) forall T unsafe_as

Constructor methods inherited from class Object

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

Instance Method Detail

def close #

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? #

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 #

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


[View source]
def flush #

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 respond_with_error(message = "Internal Server Error", code = 500) #

Sends an error response.

Calls #reset, writes the given status, and closes the response.

DEPRECATED Use #respond_with_status instead


[View source]
def respond_with_status(status : Int, message : String? = 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.


[View source]
def respond_with_status(status : HTTP::Status, message : String? = 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.


[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) #

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_code #

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 upgrade(&) #

Upgrades this response, writing headers and yieling the connection IO (a socket) to the given block. The block must invoke #close afterwards, the server won't do it in this case. 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 #

[View source]