struct URI::Params

Overview

An ordered multi-value mapped collection representing generic URI parameters.

Included Modules

Defined in:

uri/params.cr

Constructors

Class Method Summary

Instance Method Summary

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

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

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

element_type(x) element_type

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(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! 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

Constructor Detail

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

def self.newSource

Returns an empty URI::Params.

def self.parse(query : String) : selfSource

Parses an URI query string into a URI::Params

require "uri/params"

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

Class Method Detail

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

Builds an url-encoded URI 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 "uri/params"

params = URI::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"

def self.encode(hash : Hash(String, String | Array(String))) : StringSource

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

require "uri/params"

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

def self.encode(named_tuple : NamedTuple)Source

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

require "uri/params"

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

def self.parse(query : String, &)Source

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

require "uri/params"

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

Instance Method Detail

def ==(other : self)

def [](name) : StringSource

Returns first value for specified param name.

require "uri/params"

params = URI::Params.parse("[email protected]")
params["email"]              # => "[email protected]"
params["non_existent_param"] # KeyError

def []=(name, value : String | Array(String))Source

Sets the name key to value.

require "uri/params"

params = URI::Params{"a" => ["b", "c"]}
params["a"] = "d"
params["a"]           # => "d"
params.fetch_all("a") # => ["d"]

params["a"] = ["e", "f"]
params["a"]           # => "e"
params.fetch_all("a") # => ["e", "f"]

def []?(name) : String?Source

Returns first value or nil for specified param name.

params["email"]?              # => "[email protected]"
params["non_existent_param"]? # nil

def add(name, value)Source

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"]

def clone : selfSource

Returns a copy of this URI::Params instance.

require "uri/params"

original = URI::Params{"name" => "Jamie"}
updated = original.clone
updated["name"] = "Ary"

original["name"] # => "Jamie"

Identical to #dup.

def delete(name) : StringSource

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

def delete_all(name) : Array(String)?Source

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

def dup : selfSource

Returns a copy of this URI::Params instance.

require "uri/params"

original = URI::Params{"name" => "Jamie"}
updated = original.dup
updated["name"] = "Ary"

original["name"] # => "Jamie"

Identical to #clone.

def each(&)Source

Allows to iterate over all name-value pairs.

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

# Outputs:
# email => [email protected]
# item => keychain
# item => keynote

def empty?(*args, **options)Source

Returns true if params is empty.

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

def empty?(*args, **options, &)Source

Returns true if params is empty.

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

def fetch(name, default)Source

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

params["email"] = "[email protected]"
params.fetch("email", "[email protected]")           # => "[email protected]"
params.fetch("non_existent_param", "default value") # => "default value"

def fetch(name, &)Source

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

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

def fetch_all(name) : Array(String)Source

Returns all values for specified param name.

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

def has_key?(*args, **options)Source

Returns true if param with provided name exists.

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

def has_key?(*args, **options, &)Source

Returns true if param with provided name exists.

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

def hash(hasher)

Description copied from struct Struct

See Object#hash(hasher)

def set_all(name, values)Source

Sets all values for specified param name at once.

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

def to_s(io : IO) : NilSource

Serializes to string representation as http url-encoded form.

require "uri/params"

params = URI::Params.parse("item=keychain&item=keynote&[email protected]")
params.to_s # => "item=keychain&item=keynote&email=john%40example.org"

© 2012–2021 Manas Technology Solutions.
Licensed under the Apache License, Version 2.0.
https://crystal-lang.org/api/1.2.1/URI/Params.html