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(&block)
each_byte each_byte, each_char(&block)
each_char each_char, each_line(*args, **options)
each_line(*args, **options, &block) each_line, encoding : String encoding, flush flush, gets(limit : Int) : String | Nil
gets(delimiter : Char, limit : Int) : String | Nil
gets(delimiter : Char) : String | Nil
gets : String | Nil
gets(delimiter : String) : String | Nil gets, gets_to_end : String gets_to_end, print(obj) : Nil
print(*objects : _) : Nil print, printf(format_string, *args) : Nil
printf(format_string, args : Array | Tuple) : Nil printf, puts(*objects : _) : Nil
puts : Nil
puts(string : String) : Nil
puts(obj) : Nil puts, read(slice : Slice(UInt8)) read, 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 : Slice(UInt8)) read_fully, read_line(*args, **options) : String | Nil read_line, read_utf8(slice : Slice(UInt8)) read_utf8, read_utf8_byte read_utf8_byte, rewind rewind, set_encoding(encoding : String, invalid : Symbol | Nil = nil) set_encoding, skip(bytes_count : Int) : Nil skip, tty? : Bool tty?, write(slice : Slice(UInt8)) : Nil write, write_byte(byte : UInt8) write_byte, write_bytes(object, format : IO::ByteFormat = IO::ByteFormat::SystemEndian) write_bytes, write_utf8(slice : Slice(UInt8)) write_utf8

Class methods inherited from module IO

copy(src, dst, limit : Int)
copy(src, dst) copy, pipe(read_blocking = false, write_blocking = false, &block)
pipe(read_blocking = false, write_blocking = false) pipe, select(read_ios, write_ios, error_ios, timeout_sec : LibC::TimeT | Int | Float | Nil)
select(read_ios, write_ios = nil, error_ios = nil) select

Instance methods inherited from module JSON::Builder

json_array(&block) json_array, json_object(&block) json_object

Instance methods inherited from class Reference

==(other)
==(other : self) ==, dup dup, hash hash, inspect(io : IO) : Nil inspect, object_id : UInt64 object_id, same?(other : Reference)
same?(other : Nil) same?, to_s(io : IO) : Nil to_s

Instance methods inherited from class Object

!=(other) !=, !~(other) !~, ==(other) ==, ===(other)
===(other : YAML::Any)
===(other : JSON::Any) ===, =~(other) =~, class class, crystal_type_id crystal_type_id, dup dup, hash hash, inspect(io : IO)
inspect inspect, itself itself, not_nil! not_nil!, tap(&block) tap, 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
to_yaml(io : IO) to_yaml, try(&block) try

Class methods inherited from class Object

==(other : Class) ==, ===(other) ===, cast(other) : self cast, clone clone, dup dup, from_json(string_or_io) : self
from_json(string_or_io, root : String) : self from_json, from_yaml(string : String) : self from_yaml, hash hash, inspect(io) inspect, name : String name, nilable? nilable?, to_s(io) to_s, |(other : U.class) forall U |

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 : Slice(UInt8)) #

See IO#write(slice).


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