Example for the app::http_request main service AsyncHttpRequest

Introduced classes

class HttpRequestClientWindow

app :: HttpRequestClientWindow

Simple window with a label and a button
class MyHttpRequest

app :: MyHttpRequest

Simple asynchronous HTTP request to http://example.com/ displaying feedback to the window

Redefined classes

redef class Sys

app :: http_request_example $ Sys

The main class of the program.

All class definitions

class HttpRequestClientWindow

app $ HttpRequestClientWindow

Simple window with a label and a button
class MyHttpRequest

app $ MyHttpRequest

Simple asynchronous HTTP request to http://example.com/ displaying feedback to the window
redef class Sys

app :: http_request_example $ Sys

The main class of the program.
package_diagram app::http_request_example http_request_example app::ui ui app::http_request_example->app::ui app::http_request http_request app::http_request_example->app::http_request android::aware aware app::http_request_example->android::aware app::app_base app_base app::ui->app::app_base app::http_request->app::app_base pthreads pthreads app::http_request->pthreads json json app::http_request->json core core android::aware->core ...app::app_base ... ...app::app_base->app::app_base ...pthreads ... ...pthreads->pthreads ...json ... ...json->json ...core ... ...core->core a_star-m a_star-m a_star-m->app::http_request_example


module abstract_collection

core :: abstract_collection

Abstract collection classes and services.
module abstract_text

core :: abstract_text

Abstract class for manipulation of sequences of characters
module app_base

app :: app_base

Base of the app.nit framework, defines App
module array

core :: array

This module introduces the standard array structure.
module bitset

core :: bitset

Services to handle BitSet
module bytes

core :: bytes

Services for byte streams and arrays
module caching

serialization :: caching

Services for caching serialization engines
module circular_array

core :: circular_array

Efficient data structure to access both end of the sequence.
module codec_base

core :: codec_base

Base for codecs to use with streams
module codecs

core :: codecs

Group module for all codec-related manipulations
module collection

core :: collection

This module define several collection classes.
module core

core :: core

Standard classes and methods used by default by Nit programs and libraries.
module engine_tools

serialization :: engine_tools

Advanced services for serialization engines
module environ

core :: environ

Access to the environment variables of the process
module error

core :: error

Standard error-management infrastructure.
module error

json :: error

Intro JsonParseError which is exposed by all JSON reading APIs
module exec

core :: exec

Invocation and management of operating system sub-processes.
module file

core :: file

File manipulations (create, read, write, etc.)
module fixed_ints

core :: fixed_ints

Basic integers of fixed-precision
module fixed_ints_text

core :: fixed_ints_text

Text services to complement fixed_ints
module flat

core :: flat

All the array-based text representations
module gc

core :: gc

Access to the Nit internal garbage collection mechanism
module hash_collection

core :: hash_collection

Introduce HashMap and HashSet.
module inspect

serialization :: inspect

Refine Serializable::inspect to show more useful information
module iso8859_1

core :: iso8859_1

Codec for ISO8859-1 I/O
module json

json :: json

Read and write JSON formatted text using the standard serialization services
module kernel

core :: kernel

Most basic classes and methods.
module list

core :: list

This module handle double linked lists
module math

core :: math

Mathematical operations
module meta

meta :: meta

Simple user-defined meta-level to manipulate types of instances as object.
module native

core :: native

Native structures for text and bytes
module numeric

core :: numeric

Advanced services for Numeric types
module parser_base

parser_base :: parser_base

Simple base for hand-made parsers of all kinds
module poset

poset :: poset

Pre order sets and partial order set (ie hierarchies)
module protocol

core :: protocol

module pthreads

pthreads :: pthreads

Main POSIX threads support and intro the classes Thread, Mutex and Barrier
module queue

core :: queue

Queuing data structures and wrappers
module range

core :: range

Module for range of discrete objects.
module re

core :: re

Regular expression support for all services based on Pattern
module ropes

core :: ropes

Tree-based representation of a String.
module safe

serialization :: safe

Services for safer deserialization engines
module serialization

serialization :: serialization

General serialization services
module serialization_core

serialization :: serialization_core

Abstract services to serialize Nit objects to different formats
module serialization_read

json :: serialization_read

Services to read JSON: deserialize_json and JsonDeserializer
module serialization_write

json :: serialization_write

Services to write Nit objects to JSON strings: serialize_to_json and JsonSerializer
module sorter

core :: sorter

This module contains classes used to compare things and sorts arrays.
module static

json :: static

Static interface to read Nit objects from JSON strings
module stream

core :: stream

Input and output streams of characters
module text

core :: text

All the classes and methods related to the manipulation of text entities
module time

core :: time

Management of time and dates
module union_find

core :: union_find

union–find algorithm using an efficient disjoint-set data structure
module utf8

core :: utf8

Codec for UTF-8 I/O


module aware

android :: aware

Android compatibility module
module http_request

app :: http_request

HTTP request services: AsyncHttpRequest and Text::http_get
module ui

app :: ui

Portable UI controls for mobiles apps


module a_star-m


# Example for the `app::http_request` main service `AsyncHttpRequest`
module http_request_example is
	app_name "app.nit HTTP"
	app_namespace "org.nitlanguage.http_example"
	android_api_target 15

import app::ui
import app::http_request
import android::aware # for android_api_target

# Simple asynchronous HTTP request to http://example.com/ displaying feedback to the window
class MyHttpRequest
	super AsyncHttpRequest

	# Back reference to the window to show feedback to the user
	var win: HttpRequestClientWindow

	# ---
	# Config the request

	redef fun uri do return "http://example.com/"
	redef fun deserialize_json do return false

	# ---
	# Customize callbacks

	redef fun before
		win.label_response.text = "Sending request..."

		# Disable button to prevent double requests
		win.button_request.enabled = false

	redef fun on_load(data, status)
	do win.label_response.text = "Received response code {status} with {data.as(Text).byte_length} bytes"

	redef fun on_fail(error)
	do win.label_response.text = "Connection error: {error}"

	redef fun after do win.button_request.enabled = true

# Simple window with a label and a button
class HttpRequestClientWindow
	super Window

	# Root layout
	var layout = new ListLayout(parent=self)

	# Button to send request
	var button_request = new Button(parent=layout, text="Press to send HTTP request")

	# Label displaying feedback to user
	var label_response = new Label(parent=layout, text="No response yet.")

	init do button_request.observers.add self

	redef fun on_event(event)
		if event isa ButtonPressEvent and event.sender == button_request then
			# Prepare and send request
			var request = new MyHttpRequest(self)

redef fun root_window do return new HttpRequestClientWindow