struct HTTP::Params

Overview

Represents a collection of http parameters and their respective values.

Included Modules

Defined in:

http/params.cr

Constructors

Class Method Summary

Instance Method Summary

Instance methods inherited from module Enumerable({String, String})

all?(&)
all?(pattern)
all?
all?
, any?(&)
any?(pattern)
any?
any?
, chunks(&block : {String, String} -> U) forall U chunks, compact_map(&) compact_map, count(&)
count(item)
count
, cycle(n, &)
cycle(&)
cycle
, each(&block : {String, String} -> _) each, each_cons(count : Int, reuse = false, &) each_cons, each_cons_pair(& : {String, String}, {String, String} -> _) : Nil each_cons_pair, each_slice(count : Int, reuse = false, &) each_slice, each_with_index(offset = 0, &) each_with_index, each_with_object(obj, &) each_with_object, find(if_none = nil, &) find, first(count : Int)
first
first
, first? first?, flat_map(&block : {String, String} -> Array(U) | Iterator(U) | U) forall U flat_map, grep(pattern) grep, group_by(&block : {String, String} -> U) forall U group_by, in_groups_of(size : Int, filled_up_with : U = nil) forall U
in_groups_of(size : Int, filled_up_with : U = nil, reuse = false, &) forall U
in_groups_of
, includes?(obj) includes?, index(&)
index(obj)
index
, index_by(&block : {String, String} -> U) forall U index_by, join(separator = "", &)
join(separator, io, &)
join(separator, io)
join(separator = "")
join
, map(&block : {String, String} -> U) forall U map, map_with_index(offset = 0, &block : {String, String}, Int32 -> U) forall U map_with_index, max max, max? max?, max_by(&block : {String, String} -> U) forall U max_by, max_by?(&block : {String, String} -> U) forall U max_by?, max_of(&block : {String, String} -> U) forall U max_of, max_of?(&block : {String, String} -> U) forall U max_of?, min min, min? min?, min_by(&block : {String, String} -> U) forall U min_by, min_by?(&block : {String, String} -> U) forall U min_by?, min_of(&block : {String, String} -> U) forall U min_of, min_of?(&block : {String, String} -> U) forall U min_of?, minmax minmax, minmax? minmax?, minmax_by(&block : {String, String} -> U) forall U minmax_by, minmax_by?(&block : {String, String} -> U) forall U minmax_by?, minmax_of(&block : {String, String} -> U) forall U minmax_of, minmax_of?(&block : {String, String} -> U) forall U minmax_of?, none?
none?(pattern)
none?(&)
none?
, one?(&)
one?(pattern)
one?
one?
, partition(&) partition, product(&)
product(initial : Number, &)
product
product(initial : Number)
product
, reduce(memo, &)
reduce(&)
reduce
, reduce?(&) reduce?, reject(&block : {String, String} -> )
reject(type : U.class) forall U
reject(pattern)
reject
, select(pattern)
select(type : U.class) forall U
select(&block : {String, String} -> )
select
, size size, skip(count : Int) skip, skip_while(&) skip_while, sum(initial)
sum
sum(initial, &)
sum(&)
sum
, take_while(&) take_while, tally : Hash({String, String}, Int32) tally, to_a to_a, to_h
to_h(&block : {String, String} -> Tuple(K, V)) forall K, V
to_h
, to_set to_set, zip(*others : Indexable | Iterable | Iterator, &)
zip(*others : Indexable | Iterable | Iterator)
zip
, zip?(*others : Indexable | Iterable | Iterator, &)
zip?(*others : Indexable | Iterable | Iterator)
zip?

Instance methods inherited from struct Struct

==(other) : Bool ==, hash(hasher) hash, inspect(io : IO) : Nil inspect, pretty_print(pp) : Nil pretty_print, to_s(io : IO) : Nil to_s

Instance methods inherited from struct Value

==(other : JSON::Any)
==(other : YAML::Any)
==(other)
==
, dup dup

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

Constructor Detail

def self.new(raw_params : Hash(String, Array(String))) #

[View source]
def self.new #

Returns an empty HTTP::Params.


[View source]
def self.parse(query : String) : self #

Parses an HTTP query string into a HTTP::Params

require "http/params"

HTTP::Params.parse("foo=bar&foo=baz&qux=zoo")
# => #<HTTP::Params @raw_params = {"foo" => ["bar", "baz"], "qux" => ["zoo"]}>

[View source]

Class Method Detail

def self.build(&block : Builder -> ) : String #

Builds an url-encoded HTTP form/query.

The yielded object has an #add method that accepts two arguments, a key (String) and a value (String or Nil). Keys and values are escaped using URI.encode_www_form.

require "http/params"

params = HTTP::Params.build do |form|
  form.add "color", "black"
  form.add "name", "crystal"
  form.add "year", "2012 - today"
end
params # => "color=black&name=crystal&year=2012+-+today"

[View source]
def self.encode(hash : Hash(String, String | Array(String))) #

Returns the given key value pairs as a url-encoded HTTP form/query.

require "http/params"

HTTP::Params.encode({"foo" => "bar", "baz" => ["quux", "quuz"]}) # => "foo=bar&baz=quux&baz=quuz"

[View source]
def self.encode(named_tuple : NamedTuple) #

Returns the given key value pairs as a url-encoded HTTP form/query.

require "http/params"

HTTP::Params.encode({foo: "bar", baz: ["quux", "quuz"]}) # => "foo=bar&baz=quux&baz=quuz"

[View source]
def self.parse(query : String, &) #

Parses an HTTP query and yields each key-value pair.

require "http/params"

query = "foo=bar&foo=baz&qux=zoo"
HTTP::Params.parse(query) do |key, value|
  # ...
end

[View source]

Instance Method Detail

def ==(other : self) #

[View source]
def ==(other) #
Description copied from struct Struct

Returns true if this struct is equal to other.

Both structs's instance vars are compared to each other. Thus, two structs are considered equal if each of their instance variables are equal. Subclasses should override this method to provide specific equality semantics.

struct Point
  def initialize(@x : Int32, @y : Int32)
  end
end

p1 = Point.new 1, 2
p2 = Point.new 1, 2
p3 = Point.new 3, 4

p1 == p2 # => true
p1 == p3 # => false

[View source]
def [](name) #

Returns first value for specified param name.

require "http/params"

params = HTTP::Params.parse("email=john@example.org")
params["email"]              # => "john@example.org"
params["non_existent_param"] # KeyError

[View source]
def []=(name, value) #

Sets first value for specified param name.

params["item"] = "pencil"

[View source]
def []?(name) #

Returns first value or nil for specified param name.

params["email"]?              # => "john@example.org"
params["non_existent_param"]? # nil

[View source]
def add(name, value) #

Appends new value for specified param name. Creates param when there was no such param.

params.add("item", "keychain")
params.fetch_all("item") # => ["pencil", "book", "workbook", "keychain"]

[View source]
def delete(name) #

Deletes first value for provided param name. If there are no values left, deletes param itself. Returns deleted value.

params.delete("item")    # => "keychain"
params.fetch_all("item") # => ["keynote"]

params.delete("item") # => "keynote"
params["item"]        # KeyError

params.delete("non_existent_param") # KeyError

[View source]
def delete_all(name) #

Deletes all values for provided param name. Returns array of deleted values.

params.set_all("comments", ["hello, world!", ":+1:"])
params.delete_all("comments") # => ["hello, world!", ":+1:"]
params.has_key?("comments")   # => false

[View source]
def each(&) #

Allows to iterate over all name-value pairs.

params.each do |name, value|
  puts "#{name} => #{value}"
end

# Outputs:
# email => john@example.org
# item => keychain
# item => keynote

[View source]
def empty?(*args, **options) #

Returns true if params is empty.

HTTP::Params.new.empty?                              # => true
HTTP::Params.parse("foo=bar&foo=baz&qux=zoo").empty? # => false

[View source]
def empty?(*args, **options, &) #

Returns true if params is empty.

HTTP::Params.new.empty?                              # => true
HTTP::Params.parse("foo=bar&foo=baz&qux=zoo").empty? # => false

[View source]
def fetch(name, default) #

Returns first value for specified param name. Fallbacks to provided default value when there is no such param.

params.fetch("email", "none@example.org")           # => "john@example.org"
params.fetch("non_existent_param", "default value") # => "default value"

[View source]
def fetch(name, &) #

Returns first value for specified param name. Fallbacks to return value of provided block when there is no such param.

params.fetch("email") { raise "Email is missing" }              # raises "Email is missing"
params.fetch("non_existent_param") { "default computed value" } # => "default computed value"

[View source]
def fetch_all(name) #

Returns all values for specified param name.

params.set_all("item", ["pencil", "book", "workbook"])
params.fetch_all("item") # => ["pencil", "book", "workbook"]

[View source]
def has_key?(*args, **options, &) #

Returns true if param with provided name exists.

params.has_key?("email")   # => true
params.has_key?("garbage") # => false

[View source]
def has_key?(*args, **options) #

Returns true if param with provided name exists.

params.has_key?("email")   # => true
params.has_key?("garbage") # => false

[View source]
def set_all(name, values) #

Sets all values for specified param name at once.

params.set_all("item", ["keychain", "keynote"])
params.fetch_all("item") # => ["keychain", "keynote"]

[View source]
def to_s(io : IO) : Nil #

Serializes to string representation as http url-encoded form.

require "http/params"

params = HTTP::Params.parse("item=keychain&item=keynote&email=john@example.org")
params.to_s # => "item=keychain&item=keynote&email=john%40example.org"

[View source]