recode

.editorconfig

@@ -0,0 +1,15 @@
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+indent_size = 4
+indent_style = space
+insert_final_newline = true
+
+[gradlew.bat]
+charset = latin1
+end_of_line = crlf
+
+[*.{yml, yaml, json}]
+indent_size = 2

.gitattributes

@@ -0,0 +1,3 @@
+gradlew                                   text eol=lf
+gradlew.bat                               -text
+gradle/wrapper/gradle-wrapper.properties  text eol=lf

.gitignore

@@ -0,0 +1,10 @@
+# IDEA #
+.idea/
+*.iml
+
+# GRADLE #
+.gradle/
+build/
+
+# OTHER #
+storage/

build.gradle

@@ -0,0 +1,33 @@
+//file:noinspection GrUnresolvedAccess
+buildscript {
+    apply from: 'dependencies.gradle'
+
+    repositories {
+        maven { url 'https://plugins.gradle.org/m2/' }
+    }
+    dependencies {
+        // https://plugins.gradle.org/plugin/org.springframework.boot
+        classpath deps.springboot.plugin
+    }
+}
+
+subprojects {
+    apply plugin: 'java'
+
+    group = 'ru.di9.mirror'
+
+    compileJava {
+        targetCompatibility = sourceCompatibility = JavaVersion.VERSION_17
+        options.encoding = 'UTF-8'
+    }
+
+    repositories {
+        mavenCentral()
+    }
+
+    dependencies {
+        annotationProcessor(deps.lombok)
+        compileOnly(deps.lombok)
+        implementation(deps.logger.api)
+    }
+}

core/src/main/java/ru/di9/mirror/core/FileRecord.java

@@ -0,0 +1,6 @@
+package ru.di9.mirror.core;
+
+import java.io.InputStream;
+
+public record FileRecord(String name, long size, InputStream inputStream) {
+}

core/src/main/java/ru/di9/mirror/core/FileStorage.java

@@ -0,0 +1,62 @@
+package ru.di9.mirror.core;
+
+import lombok.Getter;
+import lombok.SneakyThrows;
+
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.Optional;
+
+import static ru.di9.mirror.core.Utils.isEmptyString;
+
+@SuppressWarnings("ClassCanBeRecord")
+public class FileStorage {
+
+    @Getter
+    private final String id;
+    private final Path storagePath;
+
+    public FileStorage(String id, Path storagePath) {
+        this.id = id;
+        this.storagePath = storagePath.resolve(this.id);
+    }
+
+    @SneakyThrows
+    public Optional<FileRecord> getFile(String path) {
+        Path fullPath = storageResolve(path);
+
+        if (Files.notExists(fullPath)) {
+            return Optional.empty();
+        }
+
+        return Optional.of(new FileRecord(
+            fullPath.toFile().getName(),
+            Files.size(fullPath),
+            Files.newInputStream(fullPath)
+        ));
+    }
+
+    @SneakyThrows
+    public void putFile(String path, InputStream inputStream) {
+        Path fullPath = storageResolve(path);
+        Files.createDirectories(fullPath.getParent());
+
+        try (OutputStream outputStream = Files.newOutputStream(fullPath)) {
+            byte[] buff = new byte[8 * 1024];
+            int len;
+            while ((len = inputStream.read(buff)) > 0) {
+                outputStream.write(buff, 0, len);
+            }
+        }
+    }
+
+    private Path storageResolve(String httpPath) {
+        if (isEmptyString(httpPath)) {
+            return storagePath;
+        } else {
+            return storagePath.resolve(httpPath.substring(1));
+        }
+    }
+}

core/src/main/java/ru/di9/mirror/core/MavenClient.java

@@ -0,0 +1,47 @@
+package ru.di9.mirror.core;
+
+import lombok.SneakyThrows;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.URI;
+import java.net.http.HttpClient;
+import java.net.http.HttpRequest;
+import java.net.http.HttpResponse;
+import java.time.Duration;
+import java.util.Optional;
+
+public class MavenClient {
+
+    private final String url;
+    private final HttpClient httpClient;
+
+    public MavenClient(String url) {
+        this.url = url + (url.endsWith("/") ? url.substring(0, url.length() - 1) : "");
+
+        this.httpClient = HttpClient.newBuilder()
+            .version(HttpClient.Version.HTTP_1_1)
+            .connectTimeout(Duration.ofSeconds(10))
+            .build();
+    }
+
+    @SneakyThrows
+    public Optional<FileRecord> getFile(String path) {
+        HttpRequest request = HttpRequest.newBuilder()
+            .GET().uri(URI.create(url + path))
+            .build();
+
+        HttpResponse<InputStream> response = httpClient.send(request, HttpResponse.BodyHandlers.ofInputStream());
+        if (response.statusCode() == 404) {
+            return Optional.empty();
+        } else if (response.statusCode() == 200) {
+            return Optional.of(new FileRecord(
+                path,
+                response.headers().firstValueAsLong("Content-Length").orElse(-1L),
+                response.body()
+            ));
+        } else {
+            throw new IOException("Unexpected code " + response.statusCode());
+        }
+    }
+}

core/src/main/java/ru/di9/mirror/core/MirrorService.java

@@ -0,0 +1,36 @@
+package ru.di9.mirror.core;
+
+import lombok.RequiredArgsConstructor;
+
+import java.util.List;
+import java.util.Optional;
+
+@RequiredArgsConstructor
+public class MirrorService {
+
+    private final List<MirrorPair> mavenList;
+
+    public Optional<FileRecord> getFile(String path) {
+        Optional<FileRecord> optional;
+
+        for (MirrorPair mirrorPair : mavenList) {
+            optional = mirrorPair.fileStorage().getFile(path);
+            if (optional.isPresent()) {
+                return optional;
+            }
+        }
+
+        for (MirrorPair mirrorPair : mavenList) {
+            optional = mirrorPair.mavenClient().getFile(path);
+            if (optional.isPresent()) {
+                mirrorPair.fileStorage().putFile(path, optional.get().inputStream());
+                return mirrorPair.fileStorage().getFile(path);
+            }
+        }
+
+        return Optional.empty();
+    }
+
+    public record MirrorPair(FileStorage fileStorage, MavenClient mavenClient) {
+    }
+}

core/src/main/java/ru/di9/mirror/core/Utils.java

@@ -0,0 +1,12 @@
+package ru.di9.mirror.core;
+
+import lombok.AccessLevel;
+import lombok.NoArgsConstructor;
+
+@NoArgsConstructor(access = AccessLevel.PRIVATE)
+public class Utils {
+
+    public static boolean isEmptyString(String string) {
+        return string == null || string.isEmpty() || string.isBlank();
+    }
+}

dependencies.gradle

@@ -0,0 +1,19 @@
+//file:noinspection SpellCheckingInspection
+def springboot_version = '2.6.6'
+
+ext {
+    deps = [
+        lombok: 'org.projectlombok:lombok:1.18.20'
+    ]
+
+    deps.logger = [
+        api: 'org.slf4j:slf4j-api:1.7.30'
+    ]
+
+    deps.springboot = [
+        // https://plugins.gradle.org/plugin/org.springframework.boot
+        plugin: "org.springframework.boot:spring-boot-gradle-plugin:${springboot_version}",
+        web: "org.springframework.boot:spring-boot-starter-web:${springboot_version}",
+        config_processor: "org.springframework.boot:spring-boot-configuration-processor:${springboot_version}"
+    ]
+}

gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,5 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.5-all.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists

gradlew

@@ -0,0 +1,234 @@
+#!/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/master/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
+
+APP_HOME=$( cd "${APP_HOME:-./}" && pwd -P ) || exit
+
+APP_NAME="Gradle"
+APP_BASE_NAME=${0##*/}
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+    echo "$*"
+} >&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: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD=java
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+    case $MAX_FD in #(
+      max*)
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        ulimit -n "$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
+
+# Collect all arguments for the java command;
+#   * $DEFAULT_JVM_OPTS, $JAVA_OPTS, and $GRADLE_OPTS can contain fragments of
+#     shell script including quotes and variable substitutions, so put them in
+#     double quotes to make sure that they get re-expanded; and
+#   * put everything else in single quotes, so that it's not re-expanded.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -classpath "$CLASSPATH" \
+        org.gradle.wrapper.GradleWrapperMain \
+        "$@"
+
+# 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 "$JAVACMD" "$@"

gradlew.bat

@@ -0,0 +1,89 @@
+@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=.
+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%" == "0" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+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%"=="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!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

settings.gradle

@@ -0,0 +1,6 @@
+rootProject.name = 'project-mirror'
+
+include(
+    'core',
+    'web-spring'
+)

web-spring/build.gradle

@@ -0,0 +1,24 @@
+apply plugin: 'org.springframework.boot'
+
+dependencies {
+    implementation(project(':core'))
+
+    annotationProcessor(deps.springboot.config_processor)
+    implementation(deps.springboot.web)
+}
+
+tasks.named('compileJava') {
+    it.dependsOn('moveSpringConfigurationMetadata')
+}
+
+tasks.register('moveSpringConfigurationMetadata').configure {
+    it.dependsOn('processResources')
+    doLast {
+        def metafile = file("${sourceSets.main.output.resourcesDir}/META-INF/additional-spring-configuration-metadata.json")
+        if (metafile.exists()) {
+            def metafileTo = file("${sourceSets.main.output.classesDirs.asPath}/META-INF/spring-configuration-metadata.json")
+            metafileTo.parentFile.mkdirs()
+            metafile.renameTo(metafileTo)
+        }
+    }
+}

web-spring/src/main/java/ru/di9/mirror/web/Application.java

@@ -0,0 +1,12 @@
+package ru.di9.mirror.web;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class Application {
+
+    public static void main(String[] args) {
+        SpringApplication.run(Application.class, args);
+    }
+}

web-spring/src/main/java/ru/di9/mirror/web/config/MavenMirrorsProperties.java

@@ -0,0 +1,24 @@
+package ru.di9.mirror.web.config;
+
+import lombok.Getter;
+import lombok.Setter;
+import org.springframework.boot.context.properties.ConfigurationProperties;
+import org.springframework.stereotype.Component;
+
+import java.util.ArrayList;
+import java.util.List;
+
+@Component
+@ConfigurationProperties(prefix = "maven-mirrors")
+public class MavenMirrorsProperties {
+
+    @Getter
+    @Setter
+    private String storage;
+
+    @Getter
+    private final List<MirrorData> list = new ArrayList<>();
+
+    public record MirrorData(String id, String url) {
+    }
+}

web-spring/src/main/java/ru/di9/mirror/web/config/WebConfig.java

@@ -0,0 +1,32 @@
+package ru.di9.mirror.web.config;
+
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import ru.di9.mirror.core.FileStorage;
+import ru.di9.mirror.core.MavenClient;
+import ru.di9.mirror.core.MirrorService;
+import ru.di9.mirror.core.MirrorService.MirrorPair;
+
+import java.nio.file.Path;
+import java.nio.file.Paths;
+
+@Slf4j
+@Configuration
+public class WebConfig {
+
+    @Bean
+    @SuppressWarnings("java:S3864")
+    public MirrorService mirrorService(MavenMirrorsProperties mirrorsProperties) {
+        Path storagePath = Paths.get(mirrorsProperties.getStorage());
+
+        return new MirrorService(mirrorsProperties.getList()
+            .stream()
+            .peek(v -> log.info("read config mirror: {}|{}", v.id(), v.url()))
+            .map(mirrorData -> new MirrorPair(
+                new FileStorage(mirrorData.id(), storagePath),
+                new MavenClient(mirrorData.url())
+            ))
+            .toList());
+    }
+}

web-spring/src/main/java/ru/di9/mirror/web/controller/MavenController.java

@@ -0,0 +1,36 @@
+package ru.di9.mirror.web.controller;
+
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.core.io.InputStreamResource;
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.MediaType;
+import org.springframework.http.ResponseEntity;
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RequestMapping;
+import ru.di9.mirror.core.MirrorService;
+
+@Slf4j
+@Controller
+@RequestMapping(path = "/maven")
+public class MavenController {
+
+    private final MirrorService mirrorService;
+
+    public MavenController(MirrorService mirrorService) {
+        this.mirrorService = mirrorService;
+    }
+
+    @GetMapping(path = "/{*path}")
+    public ResponseEntity<InputStreamResource> artifactFileGet(@PathVariable("path") String httpPath) {
+        return mirrorService.getFile(httpPath)
+            .map(fileRecord -> ResponseEntity.ok()
+                .header(HttpHeaders.CONTENT_DISPOSITION,
+                    "attachment; filename=\"" + fileRecord.name() + "\"")
+                .contentType(MediaType.APPLICATION_OCTET_STREAM)
+                .contentLength(fileRecord.size())
+                .body(new InputStreamResource(fileRecord.inputStream())))
+            .orElse(ResponseEntity.notFound().build());
+    }
+}

web-spring/src/main/resources/META-INF/additional-spring-configuration-metadata.json

@@ -0,0 +1,13 @@
+{
+  "properties": [
+    {
+      "name": "maven-mirrors.storage",
+      "type": "java.lang.String"
+    },
+    {
+      "name": "maven-mirrors.list",
+      "type": "java.util.List<ru.di9.mirror.web.config.MavenMirrorsProperties.MirrorData>",
+      "sourceType": "java.util.List<ru.di9.mirror.web.config.MavenMirrorsProperties.MirrorData>"
+    }
+  ]
+}

web-spring/src/main/resources/application.yml

@@ -0,0 +1,11 @@
+server:
+  address: 127.0.0.1
+  port: 8080
+
+debug: false
+
+maven-mirrors:
+  storage: './storage'
+  list:
+    - id: 'maven-central'
+      url: 'https://repo1.maven.org/maven2'