# class MIME::Multipart::Parser

- MIME::Multipart::Parser
- Reference
- Object

##
Overview

Parses multipart MIME messages.

###
Example

    require "mime/multipart"

    multipart = "--aA40\r\nContent-Type: text/plain\r\n\r\nbody\r\n--aA40--"
    parser = MIME::Multipart::Parser.new(IO::Memory.new(multipart), "aA40")

    while parser.has_next?
      parser.next do |headers, io|
        headers["Content-Type"] # => "text/plain"
        io.gets_to_end          # => "body"
      end
    end

Please note that the IO object yielded by `#next` is only valid until the block returns.

##
Defined in:

mime/multipart/parser.cr

##
Constructors

- .new(io : IO, boundary : String)

  Creates a new `Multipart::Parser` which parses io with multipart boundary boundary.

##
Instance Method Summary

- #has_next? : Bool

  True if `#next` can be called legally.

- #next(&)

  Parses the next body part and yields headers as `HTTP::Headers` and the body text as an `IO`.

### 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

##
Constructor Detail

def self.new(io : IO, boundary : String) #

Creates a new `Multipart::Parser` which parses io with multipart boundary boundary.

##
Instance Method Detail

def has_next? : Bool #

True if `#next` can be called legally.

def next(&) #

Parses the next body part and yields headers as `HTTP::Headers` and the body text as an `IO`.

This method yields once instead of returning the values, because the IO object yielded to the block is only valid while the block is executing. The IO object will be closed as soon as the block returns. To store the content of the body part for longer than the block, the IO must be read into memory.

    require "mime/multipart"

    multipart = "--aA40\r\nContent-Type: text/plain\r\n\r\nbody\r\n--aA40--"
    parser = MIME::Multipart::Parser.new(IO::Memory.new(multipart), "aA40")
    parser.next do |headers, io|
      headers["Content-Type"] # => "text/plain"
      io.gets_to_end          # => "body"
    end