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httpi.rb
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httpi.rb
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require "logger"
require "httpi/version"
require "httpi/request"
require "httpi/adapter/httpclient"
require "httpi/adapter/curb"
require "httpi/adapter/net_http"
require "httpi/adapter/em_http"
# = HTTPI
#
# Executes HTTP requests using a predefined adapter.
# All request methods accept an <tt>HTTPI::Request</tt> and an optional adapter.
# They may also offer shortcut methods for executing basic requests.
# Also they all return an <tt>HTTPI::Response</tt>.
#
# == GET
#
# request = HTTPI::Request.new("http://example.com")
# HTTPI.get(request, :httpclient)
#
# === Shortcuts
#
# HTTPI.get("http://example.com", :curb)
#
# == POST
#
# request = HTTPI::Request.new
# request.url = "http://example.com"
# request.body = "<some>xml</some>"
#
# HTTPI.post(request, :httpclient)
#
# === Shortcuts
#
# HTTPI.post("http://example.com", "<some>xml</some>", :curb)
#
# == HEAD
#
# request = HTTPI::Request.new("http://example.com")
# HTTPI.head(request, :httpclient)
#
# === Shortcuts
#
# HTTPI.head("http://example.com", :curb)
#
# == PUT
#
# request = HTTPI::Request.new
# request.url = "http://example.com"
# request.body = "<some>xml</some>"
#
# HTTPI.put(request, :httpclient)
#
# === Shortcuts
#
# HTTPI.put("http://example.com", "<some>xml</some>", :curb)
#
# == DELETE
#
# request = HTTPI::Request.new("http://example.com")
# HTTPI.delete(request, :httpclient)
#
# === Shortcuts
#
# HTTPI.delete("http://example.com", :curb)
#
# == More control
#
# If you need more control over your request, you can access the HTTP client
# instance represented by your adapter in a block.
#
# HTTPI.get request do |http|
# http.follow_redirect_count = 3 # HTTPClient example
# end
module HTTPI
REQUEST_METHODS = [:get, :post, :head, :put, :delete]
DEFAULT_LOG_LEVEL = :debug
class Error < StandardError; end
class TimeoutError < Error; end
class NotSupportedError < Error; end
class NotImplementedError < Error; end
class SSLError < Error
def initialize(message = nil, original = $!)
super(message)
@original = original
end
attr_reader :original
end
class << self
# Executes an HTTP GET request.
def get(request, adapter = nil)
request = Request.new(request) if request.kind_of? String
request(:get, request, adapter)
end
# Executes an HTTP POST request.
def post(*args)
request, adapter = request_and_adapter_from(args)
request(:post, request, adapter)
end
# Executes an HTTP HEAD request.
def head(request, adapter = nil)
request = Request.new(request) if request.kind_of? String
request(:head, request, adapter)
end
# Executes an HTTP PUT request.
def put(*args)
request, adapter = request_and_adapter_from(args)
request(:put, request, adapter)
end
# Executes an HTTP DELETE request.
def delete(request, adapter = nil)
request = Request.new(request) if request.kind_of? String
request(:delete, request, adapter)
end
# Executes an HTTP request for the given +method+.
def request(method, request, adapter = nil)
adapter_class = load_adapter(adapter, request)
yield adapter_class.client if block_given?
log_request(method, request, Adapter.identify(adapter_class.class))
adapter_class.request(method)
end
# Shortcut for setting the default adapter to use.
def adapter=(adapter)
Adapter.use = adapter
end
# Sets whether to log HTTP requests.
attr_writer :log
# Returns whether to log HTTP requests. Defaults to +true+.
def log?
@log != false
end
# Sets the logger to use.
attr_writer :logger
# Returns the logger. Defaults to an instance of +Logger+ writing to STDOUT.
def logger
@logger ||= ::Logger.new($stdout)
end
# Sets the log level.
attr_writer :log_level
# Returns the log level. Defaults to :debug.
def log_level
@log_level ||= DEFAULT_LOG_LEVEL
end
# Logs a given +message+.
def log(message)
logger.send(log_level, message) if log?
end
# Reset the default config.
def reset_config!
@log = nil
@logger = nil
@log_level = nil
end
private
def request_and_adapter_from(args)
return args if args[0].kind_of? Request
[Request.new(:url => args[0], :body => args[1]), args[2]]
end
def load_adapter(adapter, request)
Adapter.load(adapter).new(request)
end
def log_request(method, request, adapter)
log("HTTPI #{method.to_s.upcase} request to #{request.url.host} (#{adapter})")
end
end
end