diff --git a/assets/java/.gitattributes b/assets/java/.gitattributes new file mode 100644 index 0000000..097f9f9 --- /dev/null +++ b/assets/java/.gitattributes @@ -0,0 +1,9 @@ +# +# https://help.github.com/articles/dealing-with-line-endings/ +# +# Linux start script should use lf +/gradlew text eol=lf + +# These are Windows script files and should use crlf +*.bat text eol=crlf + diff --git a/assets/java/.gitignore b/assets/java/.gitignore new file mode 100644 index 0000000..1b6985c --- /dev/null +++ b/assets/java/.gitignore @@ -0,0 +1,5 @@ +# Ignore Gradle project-specific cache directory +.gradle + +# Ignore Gradle build output directory +build diff --git a/assets/java/app/build.gradle b/assets/java/app/build.gradle new file mode 100644 index 0000000..0f765c9 --- /dev/null +++ b/assets/java/app/build.gradle @@ -0,0 +1,41 @@ +/* + * This file was generated by the Gradle 'init' task. + * + * This generated file contains a sample Java application project to get you started. + * For more details take a look at the 'Building Java & JVM projects' chapter in the Gradle + * User Manual available at https://docs.gradle.org/8.0.2/userguide/building_java_projects.html + */ + +plugins { + // Apply the application plugin to add support for building a CLI application in Java. + id 'application' +} + +repositories { + // Use Maven Central for resolving dependencies. + mavenCentral() +} + +dependencies { + // Use JUnit Jupiter for testing. + testImplementation 'org.junit.jupiter:junit-jupiter:5.9.1' + + // This dependency is used by the application. + implementation 'com.google.guava:guava:31.1-jre' + + // Servlet API for Java EE + implementation 'javax.servlet:javax.servlet-api:4.0.1' + + // https://mvnrepository.com/artifact/org.json/json + implementation group: 'org.json', name: 'json', version: '20240303' +} + +application { + // Define the main class for the application. + mainClass = 'com.catswords.caterpillar.App' +} + +tasks.named('test') { + // Use JUnit Platform for unit tests. + useJUnitPlatform() +} diff --git a/assets/java/app/src/com/catswords/caterpillar/App.java b/assets/java/app/src/com/catswords/caterpillar/App.java new file mode 100644 index 0000000..cc0e1cf --- /dev/null +++ b/assets/java/app/src/com/catswords/caterpillar/App.java @@ -0,0 +1,8 @@ +package com.catswords.caterpillar; + +public class App { + public static void main(String[] args) { + // Stateful mode only + throw new UnsupportedOperationException("This method is not yet implemented."); + } +} diff --git a/assets/java/app/src/com/catswords/caterpillar/Worker.java b/assets/java/app/src/com/catswords/caterpillar/Worker.java new file mode 100644 index 0000000..0730196 --- /dev/null +++ b/assets/java/app/src/com/catswords/caterpillar/Worker.java @@ -0,0 +1,195 @@ +package com.catswords.caterpillar; + +import java.io.BufferedReader; +import java.io.DataOutputStream; +import java.io.InputStreamReader; +import java.net.InetSocketAddress; +import java.net.Socket; +import java.util.HashMap; +import java.util.Map; +import java.util.regex.Matcher; +import java.util.regex.Pattern; + +import org.json.JSONObject; +import javax.servlet.jsp.JspWriter; + +public class Worker { + + @SuppressWarnings("unused") + private static class JsonRpc2 { + public class Call { + public Call(Map params, String id, String method) { + this.params = params; + this.id = id; + this.method = method; + } + public final String jsonrpc = "2.0"; + public String id; + public String method; + public Map params; + public String toString() { + return (new JSONObject(this)).toString(); + } + } + + public class Error { + public Error(Map error, String id) { + this.error = error; + this.id = id; + } + public final String jsonrpc = "2.0"; + public String id; + public Map error; + public String toString() { + return (new JSONObject(this)).toString(); + } + } + + public class Result { + public Result(Map result, String id) { + this.result = result; + this.id = id; + } + public final String jsonrpc = "2.0"; + public String id; + public Map result; + public String toString() { + return (new JSONObject(this)).toString(); + } + } + } + + private static Map parseHeaders(String str) { + Map headers = new HashMap<>(); + String[] lines = str.split("\r?\n"); + String firstLine = lines[0]; + headers.put("@method", firstLine.split(" ")[0]); + for (int i = 1; i < lines.length; i++) { + String line = lines[i]; + Matcher matcher = Pattern.compile("^([^:]+):(.*)$").matcher(line); + if (matcher.matches()) { + headers.put(matcher.group(1), matcher.group(2).trim()); + } + } + return headers; + } + + private static readFromRemoteServer(String remoteAddress, int remotePort, String scheme, byte[] requestData, object _out, int bufferSize, String id) { + JspWriter jspWriterOut = (out instanceof JspWriter ? (JspWriter) _out : null); + Socket conn = (out instanceof Socket ? (Socket) _out : null); + + char[] buffer = new char[bufferSize]; + int bytesRead; + + try { + // connect to the remote server + Socket sock = new Socket(); + sock.connect(new InetSocketAddress(remoteAddress, remotePort)); + DataOutputStream outRemote = new DataOutputStream(sock.getOutputStream()); + BufferedReader inRemote = new BufferedReader(new InputStreamReader(sock.getInputStream())); + DataOutputStream outClient = new DataOutputStream(conn.getOutputStream()); + BufferedReader inClient = new BufferedReader(new InputStreamReader(conn.getInputStream())); + + // send data to the remote server + if (jspWriterOut != null) { + outRemote.write(requestData, 0, requestData.length); + } else if (conn != null) { + while ((bytesRead = inClient.read(buffer, 0, bufferSize)) != -1) { + char[] outBuffer = new char[bytesRead]; + System.arraycopy(buffer, 0, outBuffer, 0, bytesRead); + outRemote.write(outBuffer); + } + } + + // receive a response and forward to the client + while ((bytesRead = inRemote.read(buffer, 0, bufferSize)) != -1) { + if (jspWriterOut != null) { + out.write(buffer, 0, bytesRead); + } else if (conn != null) { + char[] outBuffer = new char[bytesRead]; + System.arraycopy(buffer, 0, outBuffer, 0, bytesRead); + outClient.write(outBuffer); + } + } + } catch (Exception e) { + // build a description of the error + Map error = new HashMap<>(); + error.put("status", 502); + error.put("code", e.getMessage()); + error.put("message", e.getMessage()); + String response = new JsonRpc2.Error(error, id); + + // send output to the client + if (jspWriterOut != null) { + out.println(response.toString()); + } else if (conn != null) { + conn.getOutputStream().write(response.toString().getBytes()); + } + } + } + + // Stateless (Servlet only) + public static void relayRequest(Map params, String id, JspWriter out) { + int bufferSize = Integer.parseInt((String) params.get("buffer_size")); + byte[] requestData = java.util.Base64.getDecoder().decode((String) params.get("request_data")); + Map requestHeader = parseHeaders(new String(requestData)); + int requestLength = Integer.parseInt((String) params.get("request_length")); + String clientAddress = (String) params.get("client_address"); + int clientPort = Integer.parseInt((String) params.get("client_port")); + String clientEncoding = (String) params.get("client_encoding"); + String remoteAddress = (String) params.get("remote_address"); + int remotePort = Integer.parseInt((String) params.get("remote_port")); + String scheme = (String) params.get("scheme"); + String datetime = (String) params.get("datetime"); + + switch (requestHeader.get("@method")) { + case "CONNECT": + Map error = new HashMap<>(); + error.put("status", 405); + error.put("code", -1); + error.put("message", "Method Not Allowed"); + out.println((new JsonRpc2.Error(error, id)).toString()); + break; + + default: + readFromRemoteServer(remoteAddress, remotePort, scheme, requestData, out, bufferSize, id); + } + } + + // Stateful mode (Servlet + Socket combination) + public static void relayConenct(Map params, String id, JspWriter out) { + int bufferSize = Integer.parseInt((String) params.get("buffer_size")); + String clientAddress = (String) params.get("client_address"); + int clientPort = Integer.parseInt((String) params.get("client_port")); + String clientEncoding = (String) params.get("client_encoding"); + String remoteAddress = (String) params.get("remote_address"); + int remotePort = Integer.parseInt((String) params.get("remote_port")); + String scheme = (String) params.get("scheme"); + String datetime = (String) params.get("datetime"); + + long startTime = System.currentTimeMillis(); + try { + Socket conn = new Socket(clientAddress, clientPort); + + long stopTime = System.currentTimeMillis(); + long connectionSpeed = stopTime - startTime; + JSONObject data = new JSONObject(); + data.put("success", true); + data.put("connection_speed", connectionSpeed); + String jsonData = jsonrpc2Encode("relay_accept", data, id); + + DataOutputStream outToClient = new DataOutputStream(conn.getOutputStream()); + outToClient.writeBytes(jsonData + "\r\n\r\n"); + + readFromRemoteServer(remoteAddress, remotePort, scheme, null, conn, bufferSize, id); + conn.close(); + } catch (Exception e) { + JSONObject error = new JSONObject(); + error.put("status", 502); + error.put("code", e.getMessage()); + error.put("message", e.getMessage()); + error.put("_params", params); + out.println(new JsonRpc2.Error(error, id)).toString(); + } + } +} diff --git a/assets/java/app/src/test/com/catswords/caterpillar/AppTest.java b/assets/java/app/src/test/com/catswords/caterpillar/AppTest.java new file mode 100644 index 0000000..81b00aa --- /dev/null +++ b/assets/java/app/src/test/com/catswords/caterpillar/AppTest.java @@ -0,0 +1,11 @@ +package com.catswords.caterpillar; + +import org.junit.jupiter.api.Test; +import static org.junit.jupiter.api.Assertions.*; + +class AppTest { + @Test void appHasAGreeting() { + App classUnderTest = new App(); + assertNotNull(classUnderTest.getGreeting(), "app should have a greeting"); + } +} diff --git a/assets/java/gradle/wrapper/gradle-wrapper.jar b/assets/java/gradle/wrapper/gradle-wrapper.jar new file mode 100644 index 0000000..d64cd49 Binary files /dev/null and b/assets/java/gradle/wrapper/gradle-wrapper.jar differ diff --git a/assets/java/gradle/wrapper/gradle-wrapper.properties b/assets/java/gradle/wrapper/gradle-wrapper.properties new file mode 100644 index 0000000..a80b22c --- /dev/null +++ b/assets/java/gradle/wrapper/gradle-wrapper.properties @@ -0,0 +1,7 @@ +distributionBase=GRADLE_USER_HOME +distributionPath=wrapper/dists +distributionUrl=https\://services.gradle.org/distributions/gradle-8.6-bin.zip +networkTimeout=10000 +validateDistributionUrl=true +zipStoreBase=GRADLE_USER_HOME +zipStorePath=wrapper/dists diff --git a/assets/java/gradlew b/assets/java/gradlew new file mode 100644 index 0000000..1aa94a4 --- /dev/null +++ b/assets/java/gradlew @@ -0,0 +1,249 @@ +#!/bin/sh + +# +# Copyright © 2015-2021 the original authors. +# +# 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 +# +# https://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. +# + +############################################################################## +# +# Gradle start up script for POSIX generated by Gradle. +# +# Important for running: +# +# (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is +# noncompliant, but you have some other compliant shell such as ksh or +# bash, then to run this script, type that shell name before the whole +# command line, like: +# +# ksh Gradle +# +# Busybox and similar reduced shells will NOT work, because this script +# requires all of these POSIX shell features: +# * functions; +# * expansions «$var», «${var}», «${var:-default}», «${var+SET}», +# «${var#prefix}», «${var%suffix}», and «$( cmd )»; +# * compound commands having a testable exit status, especially «case»; +# * various built-in commands including «command», «set», and «ulimit». +# +# Important for patching: +# +# (2) This script targets any POSIX shell, so it avoids extensions provided +# by Bash, Ksh, etc; in particular arrays are avoided. +# +# The "traditional" practice of packing multiple parameters into a +# space-separated string is a well documented source of bugs and security +# problems, so this is (mostly) avoided, by progressively accumulating +# options in "$@", and eventually passing that to Java. +# +# Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS, +# and GRADLE_OPTS) rely on word-splitting, this is performed explicitly; +# see the in-line comments for details. +# +# There are tweaks for specific operating systems such as AIX, CygWin, +# Darwin, MinGW, and NonStop. +# +# (3) This script is generated from the Groovy template +# https://github.com/gradle/gradle/blob/HEAD/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt +# within the Gradle project. +# +# You can find Gradle at https://github.com/gradle/gradle/. +# +############################################################################## + +# Attempt to set APP_HOME + +# Resolve links: $0 may be a link +app_path=$0 + +# Need this for daisy-chained symlinks. +while + APP_HOME=${app_path%"${app_path##*/}"} # leaves a trailing /; empty if no leading path + [ -h "$app_path" ] +do + ls=$( ls -ld "$app_path" ) + link=${ls#*' -> '} + case $link in #( + /*) app_path=$link ;; #( + *) app_path=$APP_HOME$link ;; + esac +done + +# This is normally unused +# shellcheck disable=SC2034 +APP_BASE_NAME=${0##*/} +# Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036) +APP_HOME=$( cd "${APP_HOME:-./}" > /dev/null && pwd -P ) || exit + +# Use the maximum available, or set MAX_FD != -1 to use that value. +MAX_FD=maximum + +warn () { + echo "$*" +} >&2 + +die () { + echo + echo "$*" + echo + exit 1 +} >&2 + +# OS specific support (must be 'true' or 'false'). +cygwin=false +msys=false +darwin=false +nonstop=false +case "$( uname )" in #( + CYGWIN* ) cygwin=true ;; #( + Darwin* ) darwin=true ;; #( + MSYS* | MINGW* ) msys=true ;; #( + NONSTOP* ) nonstop=true ;; +esac + +CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar + + +# Determine the Java command to use to start the JVM. +if [ -n "$JAVA_HOME" ] ; then + if [ -x "$JAVA_HOME/jre/sh/java" ] ; then + # IBM's JDK on AIX uses strange locations for the executables + JAVACMD=$JAVA_HOME/jre/sh/java + else + JAVACMD=$JAVA_HOME/bin/java + fi + if [ ! -x "$JAVACMD" ] ; then + die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME + +Please set the JAVA_HOME variable in your environment to match the +location of your Java installation." + fi +else + JAVACMD=java + if ! command -v java >/dev/null 2>&1 + then + die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. + +Please set the JAVA_HOME variable in your environment to match the +location of your Java installation." + fi +fi + +# Increase the maximum file descriptors if we can. +if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then + case $MAX_FD in #( + max*) + # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked. + # shellcheck disable=SC2039,SC3045 + MAX_FD=$( ulimit -H -n ) || + warn "Could not query maximum file descriptor limit" + esac + case $MAX_FD in #( + '' | soft) :;; #( + *) + # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked. + # shellcheck disable=SC2039,SC3045 + ulimit -n "$MAX_FD" || + warn "Could not set maximum file descriptor limit to $MAX_FD" + esac +fi + +# Collect all arguments for the java command, stacking in reverse order: +# * args from the command line +# * the main class name +# * -classpath +# * -D...appname settings +# * --module-path (only if needed) +# * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables. + +# For Cygwin or MSYS, switch paths to Windows format before running java +if "$cygwin" || "$msys" ; then + APP_HOME=$( cygpath --path --mixed "$APP_HOME" ) + CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" ) + + JAVACMD=$( cygpath --unix "$JAVACMD" ) + + # Now convert the arguments - kludge to limit ourselves to /bin/sh + for arg do + if + case $arg in #( + -*) false ;; # don't mess with options #( + /?*) t=${arg#/} t=/${t%%/*} # looks like a POSIX filepath + [ -e "$t" ] ;; #( + *) false ;; + esac + then + arg=$( cygpath --path --ignore --mixed "$arg" ) + fi + # Roll the args list around exactly as many times as the number of + # args, so each arg winds up back in the position where it started, but + # possibly modified. + # + # NB: a `for` loop captures its iteration list before it begins, so + # changing the positional parameters here affects neither the number of + # iterations, nor the values presented in `arg`. + shift # remove old arg + set -- "$@" "$arg" # push replacement arg + done +fi + + +# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. +DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"' + +# Collect all arguments for the java command: +# * DEFAULT_JVM_OPTS, JAVA_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments, +# and any embedded shellness will be escaped. +# * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be +# treated as '${Hostname}' itself on the command line. + +set -- \ + "-Dorg.gradle.appname=$APP_BASE_NAME" \ + -classpath "$CLASSPATH" \ + org.gradle.wrapper.GradleWrapperMain \ + "$@" + +# Stop when "xargs" is not available. +if ! command -v xargs >/dev/null 2>&1 +then + die "xargs is not available" +fi + +# Use "xargs" to parse quoted args. +# +# With -n1 it outputs one arg per line, with the quotes and backslashes removed. +# +# In Bash we could simply go: +# +# readarray ARGS < <( xargs -n1 <<<"$var" ) && +# set -- "${ARGS[@]}" "$@" +# +# but POSIX shell has neither arrays nor command substitution, so instead we +# post-process each arg (as a line of input to sed) to backslash-escape any +# character that might be a shell metacharacter, then use eval to reverse +# that process (while maintaining the separation between arguments), and wrap +# the whole thing up as a single "set" statement. +# +# This will of course break if any of these variables contains a newline or +# an unmatched quote. +# + +eval "set -- $( + printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" | + xargs -n1 | + sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' | + tr '\n' ' ' + )" '"$@"' + +exec "$JAVACMD" "$@" diff --git a/assets/java/gradlew.bat b/assets/java/gradlew.bat new file mode 100644 index 0000000..25da30d --- /dev/null +++ b/assets/java/gradlew.bat @@ -0,0 +1,92 @@ +@rem +@rem Copyright 2015 the original author or authors. +@rem +@rem Licensed under the Apache License, Version 2.0 (the "License"); +@rem you may not use this file except in compliance with the License. +@rem You may obtain a copy of the License at +@rem +@rem https://www.apache.org/licenses/LICENSE-2.0 +@rem +@rem Unless required by applicable law or agreed to in writing, software +@rem distributed under the License is distributed on an "AS IS" BASIS, +@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +@rem See the License for the specific language governing permissions and +@rem limitations under the License. +@rem + +@if "%DEBUG%"=="" @echo off +@rem ########################################################################## +@rem +@rem Gradle startup script for Windows +@rem +@rem ########################################################################## + +@rem Set local scope for the variables with windows NT shell +if "%OS%"=="Windows_NT" setlocal + +set DIRNAME=%~dp0 +if "%DIRNAME%"=="" set DIRNAME=. +@rem This is normally unused +set APP_BASE_NAME=%~n0 +set APP_HOME=%DIRNAME% + +@rem Resolve any "." and ".." in APP_HOME to make it shorter. +for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi + +@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. +set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m" + +@rem Find java.exe +if defined JAVA_HOME goto findJavaFromJavaHome + +set JAVA_EXE=java.exe +%JAVA_EXE% -version >NUL 2>&1 +if %ERRORLEVEL% equ 0 goto execute + +echo. 1>&2 +echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 1>&2 +echo. 1>&2 +echo Please set the JAVA_HOME variable in your environment to match the 1>&2 +echo location of your Java installation. 1>&2 + +goto fail + +:findJavaFromJavaHome +set JAVA_HOME=%JAVA_HOME:"=% +set JAVA_EXE=%JAVA_HOME%/bin/java.exe + +if exist "%JAVA_EXE%" goto execute + +echo. 1>&2 +echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 1>&2 +echo. 1>&2 +echo Please set the JAVA_HOME variable in your environment to match the 1>&2 +echo location of your Java installation. 1>&2 + +goto fail + +:execute +@rem Setup the command line + +set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar + + +@rem Execute Gradle +"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %* + +:end +@rem End local scope for the variables with windows NT shell +if %ERRORLEVEL% equ 0 goto mainEnd + +:fail +rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of +rem the _cmd.exe /c_ return code! +set EXIT_CODE=%ERRORLEVEL% +if %EXIT_CODE% equ 0 set EXIT_CODE=1 +if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE% +exit /b %EXIT_CODE% + +:mainEnd +if "%OS%"=="Windows_NT" endlocal + +:omega diff --git a/assets/java/settings.gradle b/assets/java/settings.gradle new file mode 100644 index 0000000..8ac9fdf --- /dev/null +++ b/assets/java/settings.gradle @@ -0,0 +1,11 @@ +/* + * This file was generated by the Gradle 'init' task. + * + * The settings file is used to specify which projects to include in your build. + * + * Detailed information about configuring a multi-project build in Gradle can be found + * in the user manual at https://docs.gradle.org/8.0.2/userguide/multi_project_builds.html + */ + +rootProject.name = 'caterpillar-worker' +include('app')