# See the License for the specific language governing permissions and
# limitations under the License.
-# Network functionnalities based on Curl_c module.
+# Data transfer with URL syntax
+#
+# Download or upload over HTTP with `CurlHTTPRequest` and send emails with `CurlMail`.
module curl
import native_curl
-# Top level of Curl
+redef class Sys
+ # Shared Curl library handle
+ #
+ # Usually, you do not have to use this attribute, it instancied by `CurlHTTPRequest` and `CurlMail`.
+ # But in some cases you may want to finalize it to free some small resources.
+ # However, if Curl services are needed once again, this attribute must be manually set.
+ var curl: Curl = new Curl is lazy, writable
+end
+
+# Curl library handle, it is initialized and released with this class
class Curl
+ super FinalizableOnce
- protected var native = new NativeCurl.easy_init
+ private var native = new NativeCurl.easy_init
# Check for correct initialization
fun is_ok: Bool do return self.native.is_init
- # Release Curl instance
- fun destroy do self.native.easy_clean
+ redef fun finalize_once do if is_ok then native.easy_clean
end
# CURL Request
class CurlRequest
- private var curl: Curl
+ private var curl: Curl = sys.curl
# Shall this request be verbose?
var verbose: Bool = false is writable
- # Launch request method
- fun execute: CurlResponse is abstract
-
# Intern perform method, lowest level of request launching
private fun perform: nullable CurlResponseFailed
do
end
end
-# CURL HTTP Request
+# HTTP request builder
+#
+# The request itself is sent by either `execute` or `download_to_file`.
+# The attributes of this class must be set before calling either of these two methods.
+#
+# ## Minimal usage example
+#
+# ~~~
+# var request = new CurlHTTPRequest("http://example.org/")
+# var response = request.execute
+# if response isa CurlResponseSuccess then
+# print "Response status code: {response.status_code}"
+# print response.body_str
+# else if response isa CurlResponseFailed then
+# print_error response.error_msg
+# end
+# ~~~
class CurlHTTPRequest
super CurlRequest
super NativeCurlCallbacks
+ # Address of the remote resource to request
var url: String
- var datas: nullable HeaderMap = null is writable
- var headers: nullable HeaderMap = null is writable
- var delegate: nullable CurlCallbacks = null is writable
+
+ # Data for the body of a POST request
+ var data: nullable HeaderMap is writable
+
+ # Raw body string
+ #
+ # Set this value to send raw data instead of the POST formatted `data`.
+ #
+ # If `data` is set, the body will not be sent.
+ var body: nullable String is writable
+
+ # Header content of the request
+ var headers: nullable HeaderMap is writable
+
+ # Delegates to customize the behavior when running `execute`
+ var delegate: nullable CurlCallbacks is writable
# Set the user agent for all following HTTP requests
- fun user_agent=(name: String)
- do
- curl.native.easy_setopt(new CURLOption.user_agent, name)
- end
+ var user_agent: nullable String is writable
- # Execute HTTP request with settings configured through attribute
- redef fun execute
+ # Execute HTTP request
+ #
+ # By default, the response body is returned in an instance of `CurlResponse`.
+ # This behavior can be customized by setting a custom `delegate`.
+ fun execute: CurlResponse
do
if not self.curl.is_ok then return answer_failure(0, "Curl instance is not correctly initialized")
err = self.curl.native.easy_setopt(new CURLOption.url, url)
if not err.is_ok then return answer_failure(err.to_i, err.to_s)
+ var user_agent = user_agent
+ if user_agent != null then
+ err = curl.native.easy_setopt(new CURLOption.user_agent, user_agent)
+ if not err.is_ok then return answer_failure(err.to_i, err.to_s)
+ end
+
# Callbacks
err = self.curl.native.register_callback_header(callback_receiver)
if not err.is_ok then return answer_failure(err.to_i, err.to_s)
if not err.is_ok then return answer_failure(err.to_i, err.to_s)
# HTTP Header
- if self.headers != null then
- var headers_joined = self.headers.join_pairs(": ")
+ var headers = self.headers
+ if headers != null then
+ var headers_joined = headers.join_pairs(": ")
err = self.curl.native.easy_setopt(new CURLOption.httpheader, headers_joined.to_curlslist)
if not err.is_ok then return answer_failure(err.to_i, err.to_s)
end
# Datas
- if self.datas != null then
- var postdatas = self.datas.to_url_encoded(self.curl.native)
+ var data = self.data
+ if data != null then
+ var postdatas = data.to_url_encoded(self.curl)
err = self.curl.native.easy_setopt(new CURLOption.postfields, postdatas)
if not err.is_ok then return answer_failure(err.to_i, err.to_s)
+ else if body != null then
+ err = self.curl.native.easy_setopt(new CURLOption.postfields, body.as(not null))
+ if not err.is_ok then return answer_failure(err.to_i, err.to_s)
end
var err_resp = perform
if err_resp != null then return err_resp
var st_code = self.curl.native.easy_getinfo_long(new CURLInfoLong.response_code)
- if not st_code == null then success_response.status_code = st_code.response
+ if not st_code == null then success_response.status_code = st_code
return success_response
end
if not output_file_name == null then
opt_name = output_file_name
else if not self.url.substring(self.url.length-1, self.url.length) == "/" then
- opt_name = self.url.basename("")
+ opt_name = self.url.basename
else
return answer_failure(0, "Unable to extract file name, please specify one")
end
if err_resp != null then return err_resp
var st_code = self.curl.native.easy_getinfo_long(new CURLInfoLong.response_code)
- if not st_code == null then success_response.status_code = st_code.response
+ if not st_code == null then success_response.status_code = st_code
var speed = self.curl.native.easy_getinfo_double(new CURLInfoDouble.speed_download)
- if not speed == null then success_response.speed_download = speed.response
+ if not speed == null then success_response.speed_download = speed
var size = self.curl.native.easy_getinfo_double(new CURLInfoDouble.size_download)
- if not size == null then success_response.size_download = size.response
+ if not size == null then success_response.size_download = size
var time = self.curl.native.easy_getinfo_double(new CURLInfoDouble.total_time)
- if not time == null then success_response.total_time = time.response
+ if not time == null then success_response.total_time = time
success_response.file.close
end
# CURL Mail Request
-class CurlMailRequest
+#
+# ~~~
+# # Craft mail
+# var mail = new CurlMail("sender@example.org",
+# to=["to@example.org"], cc=["bob@example.org"])
+#
+# mail.headers_body["Content-Type:"] = """text/html; charset="UTF-8""""
+# mail.headers_body["Content-Transfer-Encoding:"] = "quoted-printable"
+#
+# mail.body = "<h1>Here you can write HTML stuff.</h1>"
+# mail.subject = "Hello From My Nit Program"
+#
+# # Set mail server
+# var error = mail.set_outgoing_server("smtps://smtp.example.org:465",
+# "user@example.org", "mypassword")
+# if error != null then
+# print "Mail Server Error: {error}"
+# exit 0
+# end
+#
+# # Send
+# error = mail.execute
+# if error != null then
+# print "Transfer Error: {error}"
+# exit 0
+# end
+# ~~~
+class CurlMail
super CurlRequest
super NativeCurlCallbacks
- var headers: nullable HeaderMap = null is writable
- var headers_body: nullable HeaderMap = null is writable
- var from: nullable String = null is writable
- var to: nullable Array[String] = null is writable
- var cc: nullable Array[String] = null is writable
- var bcc: nullable Array[String] = null is writable
- var subject: nullable String = "" is writable
- var body: nullable String = "" is writable
- private var supported_outgoing_protocol: Array[String] = ["smtp", "smtps"]
+ # Address of the sender
+ var from: nullable String is writable
+
+ # Main recipients
+ var to: nullable Array[String] is writable
+
+ # Subject line
+ var subject: nullable String is writable
+
+ # Text content
+ var body: nullable String is writable
+
+ # CC recipients
+ var cc: nullable Array[String] is writable
+ # BCC recipients (hidden from other recipients)
+ var bcc: nullable Array[String] is writable
- # Helper method to add conventional space while building entire mail
- private fun add_conventional_space(str: String):String do return "{str}\n" end
+ # HTTP header
+ var headers = new HeaderMap is lazy, writable
+
+ # Content header
+ var headers_body = new HeaderMap is lazy, writable
+
+ # Protocols supported to send mail to a server
+ #
+ # Default value at `["smtp", "smtps"]`
+ var supported_outgoing_protocol = ["smtp", "smtps"]
# Helper method to add pair values to mail content while building it (ex: "To:", "address@mail.com")
- private fun add_pair_to_content(str: String, att: String, val: nullable String):String
+ private fun add_pair_to_content(str: String, att: String, val: nullable String): String
do
if val != null then return "{str}{att}{val}\n"
return "{str}{att}\n"
end
# Helper method to add entire list of pairs to mail content
- private fun add_pairs_to_content(content: String, pairs: HeaderMap):String
+ private fun add_pairs_to_content(content: String, pairs: HeaderMap): String
do
for h_key, h_val in pairs do content = add_pair_to_content(content, h_key, h_val)
return content
end
# Check for host and protocol availability
- private fun is_supported_outgoing_protocol(host: String):CURLCode
+ private fun is_supported_outgoing_protocol(host: String): CURLCode
do
var host_reach = host.split_with("://")
if host_reach.length > 1 and supported_outgoing_protocol.has(host_reach[0]) then return once new CURLCode.ok
# Host & Protocol
err = is_supported_outgoing_protocol(host)
if not err.is_ok then return answer_failure(err.to_i, err.to_s)
+
err = self.curl.native.easy_setopt(new CURLOption.url, host)
if not err.is_ok then return answer_failure(err.to_i, err.to_s)
if not user == null and not pwd == null then
err = self.curl.native.easy_setopt(new CURLOption.username, user)
if not err.is_ok then return answer_failure(err.to_i, err.to_s)
+
err = self.curl.native.easy_setopt(new CURLOption.password, pwd)
if not err.is_ok then return answer_failure(err.to_i, err.to_s)
end
end
# Execute Mail request with settings configured through attribute
- redef fun execute
+ fun execute: nullable CurlResponseFailed
do
if not self.curl.is_ok then return answer_failure(0, "Curl instance is not correctly initialized")
- var success_response = new CurlMailResponseSuccess
- var content = ""
+ var lines = new Array[String]
+
# Headers
- if self.headers != null then
- content = add_pairs_to_content(content, self.headers.as(not null))
+ var headers = self.headers
+ if not headers.is_empty then
+ for k, v in headers do lines.add "{k}{v}"
end
# Recipients
- var g_rec = new Array[String]
- if self.to != null and self.to.length > 0 then
- content = add_pair_to_content(content, "To:", self.to.join(","))
- g_rec.append(self.to.as(not null))
+ var all_recipients = new Array[String]
+ var to = self.to
+ if to != null and to.length > 0 then
+ lines.add "To:{to.join(",")}"
+ all_recipients.append to
end
- if self.cc != null and self.cc.length > 0 then
- content = add_pair_to_content(content, "Cc:", self.cc.join(","))
- g_rec.append(self.cc.as(not null))
+
+ var cc = self.cc
+ if cc != null and cc.length > 0 then
+ lines.add "Cc:{cc.join(",")}"
+ all_recipients.append cc
end
- if self.bcc != null and self.bcc.length > 0 then g_rec.append(self.bcc.as(not null))
- if g_rec.length < 1 then return answer_failure(0, "The mail recipients can not be empty")
+ var bcc = self.bcc
+ if bcc != null and bcc.length > 0 then all_recipients.append bcc
- var err
+ if all_recipients.is_empty then return answer_failure(0, "There must be at lease one recipient")
- err = self.curl.native.easy_setopt(new CURLOption.follow_location, 1)
+ var err = self.curl.native.easy_setopt(new CURLOption.follow_location, 1)
if not err.is_ok then return answer_failure(err.to_i, err.to_s)
- err = self.curl.native.easy_setopt(new CURLOption.mail_rcpt, g_rec.to_curlslist)
+ err = self.curl.native.easy_setopt(new CURLOption.mail_rcpt, all_recipients.to_curlslist)
if not err.is_ok then return answer_failure(err.to_i, err.to_s)
# From
- if not self.from == null then
- content = add_pair_to_content(content, "From:", self.from)
- err = self.curl.native.easy_setopt(new CURLOption.mail_from, self.from.as(not null))
+ var from = self.from
+ if not from == null then
+ lines.add "From:{from}"
+
+ err = self.curl.native.easy_setopt(new CURLOption.mail_from, from)
if not err.is_ok then return answer_failure(err.to_i, err.to_s)
end
# Subject
- content = add_pair_to_content(content, "Subject:", self.subject)
+ var subject = self.subject
+ if subject == null then subject = "" # Default
+ lines.add "Subject: {subject}"
# Headers body
- if self.headers_body != null then
- content = add_pairs_to_content(content, self.headers_body.as(not null))
+ var headers_body = self.headers_body
+ if not headers_body.is_empty then
+ for k, v in headers_body do lines.add "{k}{v}"
end
# Body
- content = add_conventional_space(content)
- content = add_pair_to_content(content, "", self.body)
- content = add_conventional_space(content)
+ var body = self.body
+ if body == null then body = "" # Default
+
+ lines.add ""
+ lines.add body
+ lines.add ""
err = self.curl.native.register_callback_read(self)
if not err.is_ok then return answer_failure(err.to_i, err.to_s)
+ var content = lines.join("\n")
err = self.curl.native.register_read_datas_callback(self, content)
if not err.is_ok then return answer_failure(err.to_i, err.to_s)
var err_resp = perform
if err_resp != null then return err_resp
- return success_response
+ return null
end
end
var error_code: Int
var error_msg: String
+
+ redef fun to_s do return "{error_msg} ({error_code})"
end
# Success Abstract Response Success Class
end
end
-# Success Response Class of mail request
-class CurlMailResponseSuccess
- super CurlResponseSuccessIntern
-end
-
# Success Response Class of a downloaded File
class CurlFileResponseSuccess
super CurlResponseSuccessIntern
var status_code = 0
- var speed_download = 0
- var size_download = 0
- var total_time = 0
+ var speed_download = 0.0
+ var size_download = 0.0
+ var total_time = 0.0
private var file: nullable FileWriter = null
# Receive bytes stream from request due to stream callback registering
nitlanguage / nit.git / blobdiff