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linguist/samples/Nit/curl_http.nit
Lucas Bajolet dd557ed00a Added examples for Nit to samples.
Signed-off-by: Lucas Bajolet <r4pass@hotmail.com>
2014-06-27 10:49:29 -04:00

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# This file is part of NIT ( http://www.nitlanguage.org ).
#
# Copyright 2013 Matthieu Lucas <lucasmatthieu@gmail.com>
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# Sample of the Curl module.
module curl_http
import curl
# Small class to represent an Http Fetcher
class MyHttpFetcher
super CurlCallbacks
var curl: Curl
var our_body: String = ""
init(curl: Curl) do self.curl = curl
# Release curl object
fun destroy do self.curl.destroy
# Header callback
redef fun header_callback(line: String) do
# We keep this callback silent for testing purposes
#if not line.has_prefix("Date:") then print "Header_callback : {line}"
end
# Body callback
redef fun body_callback(line: String) do self.our_body = "{self.our_body}{line}"
# Stream callback - Cf : No one is registered
redef fun stream_callback(buffer: String, size: Int, count: Int) do print "Stream_callback : {buffer} - {size} - {count}"
end
# Program
if args.length < 2 then
print "Usage: curl_http <method wished [POST, GET, GET_FILE]> <target url>"
else
var curl = new Curl
var url = args[1]
var request = new CurlHTTPRequest(url, curl)
# HTTP Get Request
if args[0] == "GET" then
request.verbose = false
var getResponse = request.execute
if getResponse isa CurlResponseSuccess then
print "Status code : {getResponse.status_code}"
print "Body : {getResponse.body_str}"
else if getResponse isa CurlResponseFailed then
print "Error code : {getResponse.error_code}"
print "Error msg : {getResponse.error_msg}"
end
# HTTP Post Request
else if args[0] == "POST" then
var myHttpFetcher = new MyHttpFetcher(curl)
request.delegate = myHttpFetcher
var postDatas = new HeaderMap
postDatas["Bugs Bunny"] = "Daffy Duck"
postDatas["Batman"] = "Robin likes special characters @#ùà!è§'(\"é&://,;<>∞~*"
postDatas["Batman"] = "Yes you can set multiple identical keys, but APACHE will consider only once, the last one"
request.datas = postDatas
request.verbose = false
var postResponse = request.execute
print "Our body from the callback : {myHttpFetcher.our_body}"
if postResponse isa CurlResponseSuccess then
print "*** Answer ***"
print "Status code : {postResponse.status_code}"
print "Body should be empty, because we decided to manage callbacks : {postResponse.body_str.length}"
else if postResponse isa CurlResponseFailed then
print "Error code : {postResponse.error_code}"
print "Error msg : {postResponse.error_msg}"
end
# HTTP Get to file Request
else if args[0] == "GET_FILE" then
var headers = new HeaderMap
headers["Accept"] = "Moo"
request.headers = headers
request.verbose = false
var downloadResponse = request.download_to_file(null)
if downloadResponse isa CurlFileResponseSuccess then
print "*** Answer ***"
print "Status code : {downloadResponse.status_code}"
print "Size downloaded : {downloadResponse.size_download}"
else if downloadResponse isa CurlResponseFailed then
print "Error code : {downloadResponse.error_code}"
print "Error msg : {downloadResponse.error_msg}"
end
# Program logic
else
print "Usage : Method[POST, GET, GET_FILE]"
end
end