class HTTP::Server::Response

Overview

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

The response #status_code 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.

Included Modules

Defined in:

http/server/response.cr

Instance Method Summary

Instance methods inherited from module IO

<<(obj) : self <<, close close, closed? closed?, each_byte
each_byte(&block) : Nil each_byte, each_char(&block) : Nil
each_char each_char, each_line(*args, **options, &block) : Nil
each_line(*args, **options) each_line, encoding : String encoding, flush flush, gets(limit : Int, chomp = false) : String?
gets(delimiter : Char, chomp = false) : String?
gets(delimiter : String, chomp = false) : String?
gets(chomp = true) : String?
gets(delimiter : Char, limit : Int, chomp = false) : String? gets, gets_to_end : String gets_to_end, peek : Bytes? peek, print(*objects : _) : Nil
print(obj) : Nil print, printf(format_string, args : Array | Tuple) : Nil
printf(format_string, *args) : Nil printf, puts(*objects : _) : Nil
puts : Nil
puts(obj) : Nil
puts(string : String) : Nil puts, read(slice : Bytes) read, 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, set_encoding(encoding : String, invalid : Symbol? = nil) set_encoding, skip(bytes_count : Int) : Nil skip, skip_to_end : Nil skip_to_end, 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 module IO

copy(src, dst, limit : Int)
copy(src, dst) copy, pipe(read_blocking = false, write_blocking = false)
pipe(read_blocking = false, write_blocking = false, &block) pipe

Instance methods inherited from class Reference

==(other : self)
==(other) ==, dup dup, hash 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

!=(other) !=, !~(other) !~, ==(other) ==, ===(other : JSON::Any)
===(other : YAML::Any)
===(other) ===, =~(other) =~, class class, dup dup, hash hash, inspect(io : IO)
inspect inspect, itself itself, not_nil! not_nil!, pretty_inspect(width = 79, newline = "\n", indent = 0) : String pretty_inspect, pretty_print(pp : PrettyPrint) : Nil pretty_print, tap(&block) 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
to_s(io : IO) to_s, to_yaml(io : IO)
to_yaml to_yaml, try(&block) 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) : 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.


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def content_length=(content_length : Int) #

Convenience method to set the Content-Length header.


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def content_type=(content_type : String) #

Convenience method to set the Content-Type header.


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def cookies #

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


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def flush #

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


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def headers : HTTP::Headers #

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


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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).


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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).


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

Generates an error response using message and code.

Calls reset and then writes the given message.


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def status_code : Int32 #

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


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def status_code=(status_code : Int32) #

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


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def upgrade(&block) #

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.


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def version : String #

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


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def write(slice : Bytes) #

See IO#write(slice).


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