From 4fcf1161320b28509ed7c517d38c93f26157b6af Mon Sep 17 00:00:00 2001
From: Nguyễn Gia Phong <mcsinyx@disroot.org>
Date: Wed, 22 Feb 2023 18:36:48 +0900
Subject: Implement registation form

---
 hybring.cr | 86 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++-----
 1 file changed, 80 insertions(+), 6 deletions(-)

(limited to 'hybring.cr')

diff --git a/hybring.cr b/hybring.cr
index 220559f..1c5015e 100644
--- a/hybring.cr
+++ b/hybring.cr
@@ -1,18 +1,30 @@
-# Hybrid web ring
+# Hybrid web ring server
 # Copyright (C) 2023  Nguyễn Gia Phong
 #
-# This program is free software: you can redistribute it and/or modify
+# This file if part of hybring.
+#
+# Hybring is free software: you can redistribute it and/or modify
 # it under the terms of the GNU Affero General Public License as published by
 # the Free Software Foundation, either version 3 of the License, or
 # (at your option) any later version.
 #
-# This program is distributed in the hope that it will be useful,
+# Hybring is distributed in the hope that it will be useful,
 # but WITHOUT ANY WARRANTY; without even the implied warranty of
 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 # GNU Affero General Public License for more details.
 #
 # You should have received a copy of the GNU Affero General Public License
-# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+# along with hybring.  If not, see <https://www.gnu.org/licenses/>.
+
+require "http/server"
+require "uri"
+
+require "./xhtml"
+
+MAX_CONTENT_LENGTH = 4096
+OPENNIC_TLD = Set{".bbs", ".chan", ".cyb", ".dyn", ".epic",
+                  ".geek", ".gopher", ".indy", ".libre", ".neo",
+                  ".null", ".o", ".oss", ".oz", ".parody", ".pirate"}
 
 @[Link("sqlite3")]
 lib SQLite
@@ -21,14 +33,76 @@ lib SQLite
   fun open = sqlite3_open(filename : LibC::Char*, db : Database*) : LibC::Int
   fun prepare = sqlite3_prepare(db : Database, query : LibC::Char*,
                                 length : LibC::Int, stmt : Statement*,
-                                query_tail : LibC::Char*)
+                                query_tail : LibC::Char*) : LibC::Int
+  fun step = sqlite3_step(stmt : Statement) : Int32
+  fun column_text = sqlite3_column_text(stmt : Statement,
+                                        col : LibC::Int) : LibC::Char*
+  fun finalize = sqlite3_finalize(stmt : Statement) : LibC::Int
   fun close = sqlite3_close(db : Database) : LibC::Int
 end
 
-DB_INIT = "CREATE TABLE IF NOT EXISTS foo (id INTEGER PRIMARY KEY);";
+DB_INIT = "CREATE TABLE member (
+  id INTEGER PRIMARY KEY,
+  nick TEXT NOT NULL UNIQUE,
+  opennic TEXT NOT NULL UNIQUE,
+  icann TEXT NOT NULL UNIQUE,
+);";
 
 SQLite.open "foo.db", out db
 begin
 ensure
   SQLite.close db
 end
+
+def http_error(context, status, message = nil)
+  context.response.respond_with_status status, message
+end
+
+File.write "index.xhtml", page
+server = HTTP::Server.new do |context|
+  next http_error context, 405 if context.request.method != "POST"
+  content_length = context.request.content_length
+  next http_error context, 411 unless content_length
+  next http_error context, 413 if content_length > MAX_CONTENT_LENGTH
+
+  body = context.request.body.try &.gets_to_end || ""
+  errors = {} of String => String
+  params = {} of String => String
+  invalid_param = false
+  URI::Params.parse body do |key, value|
+    params[key] = value
+    case key
+    when "nick"
+    when "opennic"
+      uri = URI.parse value
+      next errors["opennic"] = "Must be absolute URL" unless uri.absolute?
+      if uri.scheme != "http" && uri.scheme != "https"
+        next errors["opennic"] = "Must be HTTP/S"
+      end
+      host = uri.host
+      unless OPENNIC_TLD.includes? Path[host].extension
+        next errors["opennic"] = "Must be under OpenNIC domain"
+      end if host
+    when "icann"
+      uri = URI.parse value
+      next errors["icann"] = "Must be absolute URL" unless uri.absolute?
+      next errors["icann"] = "Must be HTTPS" unless uri.scheme == "https"
+      host = uri.host # impractical to check for ICANN TLD
+      if OPENNIC_TLD.includes? Path[host].extension
+        next errors["icann"] = "Must not be under OpenNIC domain"
+      end if host
+    else
+      break invalid_param = true
+    end
+  end
+  next http_error context, 400, "Invalid Parameter" if invalid_param
+
+  context.response.status_code = 400 unless errors.empty?
+  context.response.content_type = "application/xhtml+xml"
+  context.response.print page errors, params
+  # TODO: schedule dynamic check
+end
+
+address = server.bind_tcp 8080
+puts "Listening on http://#{address}"
+server.listen
-- 
cgit 1.4.1