First public version

build.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<!-- You may freely edit this file. See commented blocks below for -->
+<!-- some examples of how to customize the build. -->
+<!-- (If you delete it and reopen the project it will be recreated.) -->
+<!-- By default, only the Clean and Build commands use this build script. -->
+<!-- Commands such as Run, Debug, and Test only use this build script if -->
+<!-- the Compile on Save feature is turned off for the project. -->
+<!-- You can turn off the Compile on Save (or Deploy on Save) setting -->
+<!-- in the project's Project Properties dialog box.-->
+<project name="WarehouseServer" default="default" basedir=".">
+    <description>Builds, tests, and runs the project WarehouseServer.</description>
+    <import file="nbproject/build-impl.xml"/>
+    <!--
+
+    There exist several targets which are by default empty and which can be 
+    used for execution of your tasks. These targets are usually executed 
+    before and after some main targets. They are: 
+
+      -pre-init:                 called before initialization of project properties
+      -post-init:                called after initialization of project properties
+      -pre-compile:              called before javac compilation
+      -post-compile:             called after javac compilation
+      -pre-compile-single:       called before javac compilation of single file
+      -post-compile-single:      called after javac compilation of single file
+      -pre-compile-test:         called before javac compilation of JUnit tests
+      -post-compile-test:        called after javac compilation of JUnit tests
+      -pre-compile-test-single:  called before javac compilation of single JUnit test
+      -post-compile-test-single: called after javac compilation of single JUunit test
+      -pre-jar:                  called before JAR building
+      -post-jar:                 called after JAR building
+      -post-clean:               called after cleaning build products
+
+    (Targets beginning with '-' are not intended to be called on their own.)
+
+    Example of inserting an obfuscator after compilation could look like this:
+
+        <target name="-post-compile">
+            <obfuscate>
+                <fileset dir="${build.classes.dir}"/>
+            </obfuscate>
+        </target>
+
+    For list of available properties check the imported 
+    nbproject/build-impl.xml file. 
+
+
+    Another way to customize the build is by overriding existing main targets.
+    The targets of interest are: 
+
+      -init-macrodef-javac:     defines macro for javac compilation
+      -init-macrodef-junit:     defines macro for junit execution
+      -init-macrodef-debug:     defines macro for class debugging
+      -init-macrodef-java:      defines macro for class execution
+      -do-jar:                  JAR building
+      run:                      execution of project 
+      -javadoc-build:           Javadoc generation
+      test-report:              JUnit report generation
+
+    An example of overriding the target for project execution could look like this:
+
+        <target name="run" depends="WarehouseServer-impl.jar">
+            <exec dir="bin" executable="launcher.exe">
+                <arg file="${dist.jar}"/>
+            </exec>
+        </target>
+
+    Notice that the overridden target depends on the jar target and not only on 
+    the compile target as the regular run target does. Again, for a list of available 
+    properties which you can use, check the target you are overriding in the
+    nbproject/build-impl.xml file. 
+
+    -->
+</project>

manifest.mf

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+Manifest-Version: 1.0
+X-COMMENT: Main-Class will be added automatically by build
+

nbproject/genfiles.properties

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+build.xml.data.CRC32=6fa89b9d
+build.xml.script.CRC32=54c0d1b5
+build.xml.stylesheet.CRC32=8064a381@1.80.1.48
+# This file is used by a NetBeans-based IDE to track changes in generated files such as build-impl.xml.
+# Do not edit this file. You may delete it but then the IDE will never regenerate such files for you.
+nbproject/build-impl.xml.data.CRC32=6fa89b9d
+nbproject/build-impl.xml.script.CRC32=cfaf6078
+nbproject/build-impl.xml.stylesheet.CRC32=830a3534@1.80.1.48

nbproject/project.properties

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+annotation.processing.enabled=true
+annotation.processing.enabled.in.editor=false
+annotation.processing.processors.list=
+annotation.processing.run.all.processors=true
+annotation.processing.source.output=${build.generated.sources.dir}/ap-source-output
+application.title=WarehouseServer
+application.vendor=root
+build.classes.dir=${build.dir}/classes
+build.classes.excludes=**/*.java,**/*.form
+# This directory is removed when the project is cleaned:
+build.dir=build
+build.generated.dir=${build.dir}/generated
+build.generated.sources.dir=${build.dir}/generated-sources
+# Only compile against the classpath explicitly listed here:
+build.sysclasspath=ignore
+build.test.classes.dir=${build.dir}/test/classes
+build.test.results.dir=${build.dir}/test/results
+# Uncomment to specify the preferred debugger connection transport:
+#debug.transport=dt_socket
+debug.classpath=\
+    ${run.classpath}
+debug.test.classpath=\
+    ${run.test.classpath}
+# Files in build.classes.dir which should be excluded from distribution jar
+dist.archive.excludes=
+# This directory is removed when the project is cleaned:
+dist.dir=dist
+dist.jar=${dist.dir}/WarehouseServer.jar
+dist.javadoc.dir=${dist.dir}/javadoc
+endorsed.classpath=
+excludes=
+includes=**
+jar.compress=false
+javac.classpath=\
+    ${reference.HTTP.jar}:\
+    ${reference.WarehouseLibrary.jar}
+# Space-separated list of extra javac options
+javac.compilerargs=
+javac.deprecation=false
+javac.external.vm=true
+javac.processorpath=\
+    ${javac.classpath}
+javac.source=1.8
+javac.target=1.8
+javac.test.classpath=\
+    ${javac.classpath}:\
+    ${build.classes.dir}
+javac.test.processorpath=\
+    ${javac.test.classpath}
+javadoc.additionalparam=
+javadoc.author=false
+javadoc.encoding=${source.encoding}
+javadoc.noindex=false
+javadoc.nonavbar=false
+javadoc.notree=false
+javadoc.private=false
+javadoc.splitindex=true
+javadoc.use=true
+javadoc.version=false
+javadoc.windowtitle=
+main.class=warehouseserver.WarehouseServer
+manifest.file=manifest.mf
+meta.inf.dir=${src.dir}/META-INF
+mkdist.disabled=false
+platform.active=default_platform
+project.HTTP=../HTTPPayloads
+project.license=gpl30
+project.WarehouseLibrary=../WarehouseLibrary
+reference.HTTP.jar=${project.HTTP}/dist/HTTP.jar
+reference.WarehouseLibrary.jar=${project.WarehouseLibrary}/dist/WarehouseLibrary.jar
+run.classpath=\
+    ${javac.classpath}:\
+    ${build.classes.dir}
+# Space-separated list of JVM arguments used when running the project.
+# You may also define separate properties like run-sys-prop.name=value instead of -Dname=value.
+# To set system properties for unit tests define test-sys-prop.name=value:
+run.jvmargs=
+run.test.classpath=\
+    ${javac.test.classpath}:\
+    ${build.test.classes.dir}
+source.encoding=UTF-8
+src.dir=src
+test.src.dir=test

nbproject/project.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://www.netbeans.org/ns/project/1">
+    <type>org.netbeans.modules.java.j2seproject</type>
+    <configuration>
+        <data xmlns="http://www.netbeans.org/ns/j2se-project/3">
+            <name>WarehouseServer</name>
+            <source-roots>
+                <root id="src.dir"/>
+            </source-roots>
+            <test-roots>
+                <root id="test.src.dir"/>
+            </test-roots>
+        </data>
+        <references xmlns="http://www.netbeans.org/ns/ant-project-references/1">
+            <reference>
+                <foreign-project>HTTP</foreign-project>
+                <artifact-type>jar</artifact-type>
+                <script>build.xml</script>
+                <target>jar</target>
+                <clean-target>clean</clean-target>
+                <id>jar</id>
+            </reference>
+            <reference>
+                <foreign-project>WarehouseLibrary</foreign-project>
+                <artifact-type>jar</artifact-type>
+                <script>build.xml</script>
+                <target>jar</target>
+                <clean-target>clean</clean-target>
+                <id>jar</id>
+            </reference>
+        </references>
+    </configuration>
+</project>

src/warehouseserver/ConnectionRunnable.java

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+/* 
+ * Copyright (C) 2017 Daniil Gentili
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU 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,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package warehouseserver;
+
+import Payloads.ServerException;
+import Payloads.RequestPayload;
+import Payloads.ResponsePayload;
+import java.io.BufferedReader;
+import java.io.BufferedWriter;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.io.OutputStreamWriter;
+import java.net.Socket;
+import java.nio.file.Files;
+import java.nio.file.Paths;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+/**
+ *
+ * @author Studente
+ */
+public class ConnectionRunnable implements Runnable {
+
+    BufferedReader input;
+    BufferedWriter output;
+    Socket client;
+    Boolean run = true;
+    String path = "/root/NetBeansProjects/WarehouseServer/src/warehouseserver/warehouse.txt";
+
+    public ConnectionRunnable(Socket client) throws IOException {
+        this.client = client;
+        input = new BufferedReader(new InputStreamReader(client.getInputStream()));
+        output = new BufferedWriter(new OutputStreamWriter(client.getOutputStream())); 
+    }
+
+
+    @Override
+    public void run() {
+        String buffer = "";
+        while (run) {
+            try {
+                buffer = this.handlePayload(new RequestPayload(input)).toString();
+            } catch (IOException ex) {
+                Logger.getLogger(ConnectionRunnable.class.getName()).log(Level.SEVERE, null, ex);
+                buffer = new ResponsePayload(500, "Internal server error").toString();
+            } catch (ServerException e) {
+                buffer = e.getPayload().toString();
+            }
+            try {
+                output.write(buffer);
+                output.flush();
+            } catch (IOException ex) {
+                Logger.getLogger(ConnectionRunnable.class.getName()).log(Level.SEVERE, null, ex);
+            }
+        }
+    }
+
+    private ResponsePayload handlePayload(RequestPayload request) throws ServerException, IOException {
+        if (!"HTTP".equals(request.getProtocol())) {
+            throw new ServerException(request, 400, "Bad request", "Wrong protocol");
+        }
+        run = request.shouldKeepAlive();
+        
+        switch (request.getMethod()) {
+            case "GET":
+                if (!"/".equals(request.getURI())) {
+                    throw new ServerException(request, 404, "File not found", "Database not found");
+                }
+                return new ResponsePayload(request, 200, "OK", getDatabase());
+            case "POST":
+                if (!"/".equals(request.getURI())) {
+                    throw new ServerException(request, 404, "File not found", "Database not found");
+                }
+                return new ResponsePayload(request, 200, "OK", getDatabase());
+            default:
+                throw new ServerException(request, 400, "Bad Request", "Bad HTTP method");
+
+        }
+
+    }
+
+    synchronized private String getDatabase() throws IOException {
+        return String.join("\n", Files.readAllLines(Paths.get(path)));
+    }
+
+}

src/warehouseserver/MultiServer.java

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+/* 
+ * Copyright (C) 2017 Daniil Gentili
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU 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,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package warehouseserver;
+
+import java.io.IOException;
+import java.net.ServerSocket;
+import java.util.concurrent.ExecutorService;
+import static java.util.concurrent.Executors.newCachedThreadPool;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+/**
+ *
+ * @author Studente
+ */
+public class MultiServer {
+    private Integer port;
+    
+    MultiServer(Integer port) {
+        this.port = port;
+    }
+    public void start() {
+        try {
+            ExecutorService pool = newCachedThreadPool();
+            ServerSocket server = new ServerSocket(port);
+            while (true) {
+                pool.submit(new ConnectionRunnable(server.accept()));
+            }
+        } catch (IOException ex) {
+            Logger.getLogger(MultiServer.class.getName()).log(Level.SEVERE, null, ex);
+        }
+    }
+}

src/warehouseserver/WarehouseServer.java

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+/* 
+ * Copyright (C) 2017 Daniil Gentili
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU 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,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package warehouseserver;
+
+/**
+ *
+ * @author Studente
+ */
+public class WarehouseServer {
+
+    /**
+     * @param args the command line arguments
+     */
+    public static void main(String[] args) {
+        new MultiServer(9090).start();
+    }    
+}

src/warehouseserver/warehouse.txt

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+1;Twilight Sparkle plushie;49.99;20
+666;Tempest Shadow plushie;79.99;10