Maven Repository HTTP Routes

Nitro Repo implements Maven repository protocol for both hosted and proxy repositories. This reference details every HTTP route, its purpose, and example usage. Replace placeholders with your own hostname, storage name, repository name, Maven coordinates, and authentication credentials.

<host> – Nitro Repo base URL (e.g. nitro.example.com)
<storage> – Storage identifier that backs the repository
<repository> – Repository name
<groupId> – Maven group ID (dots become path separators: com.example → com/example)
<artifactId> – Maven artifact ID
<version> – Maven version (e.g. 1.0.0, 1.0.0-SNAPSHOT)
<classifier> – Optional classifier (e.g. sources, javadoc)
<username> – Username for basic authentication
<password> – Password for basic authentication

Artifact Download Operations

Download Main Artifact

Download the primary JAR file:

bash

curl -u "<username>:<password>" -O \
     "https://<host>/repositories/<storage>/<repository>/<groupId>/<artifactId>/<version>/<artifactId>-<version>.jar"

Download Sources

Download source JAR:

bash

curl -u "<username>:<password>" -O \
     "https://<host>/repositories/<storage>/<repository>/<groupId>/<artifactId>/<version>/<artifactId>-<version>-sources.jar"

Download Javadoc

Download Javadoc JAR:

bash

curl -u "<username>:<password>" -O \
     "https://<host>/repositories/<storage>/<repository>/<groupId>/<artifactId>/<version>/<artifactId>-<version>-javadoc.jar"

Download Classified Artifact

Download artifact with custom classifier:

bash

curl -u "<username>:<password>" -O \
     "https://<host>/repositories/<storage>/<repository>/<groupId>/<artifactId>/<version>/<artifactId>-<version>-<classifier>.jar"

Download POM File

Download project metadata:

bash

curl -u "<username>:<password>" -O \
     "https://<host>/repositories/<storage>/<repository>/<groupId>/<artifactId>/<version>/<artifactId>-<version>.pom"

Metadata Operations

Get Version Metadata

Retrieve metadata for a specific version:

bash

curl -u "<username>:<password>" \
     "https://<host>/repositories/<storage>/<repository>/<groupId>/<artifactId>/<version>/maven-metadata.xml"

Response:

xml

<?xml version="1.0" encoding="UTF-8"?>
<metadata modelVersion="1.1.0">
  <groupId>com.example</groupId>
  <artifactId>myapp</artifactId>
  <version>1.0.0</version>
  <versioning>
    <snapshot>
      <timestamp>20231215.143022</timestamp>
      <buildNumber>1</buildNumber>
    </snapshot>
    <lastUpdated>20231215143022</lastUpdated>
    <snapshotVersions>
      <snapshotVersion>
        <extension>pom</extension>
        <value>1.0.0-SNAPSHOT</value>
        <updated>20231215143022</updated>
      </snapshotVersion>
    </snapshotVersions>
  </versioning>
</metadata>

Get Artifact Metadata

Retrieve metadata for all versions of an artifact:

bash

curl -u "<username>:<password>" \
     "https://<host>/repositories/<storage>/<repository>/<groupId>/<artifactId>/maven-metadata.xml"

Response:

xml

<?xml version="1.0" encoding="UTF-8"?>
<metadata modelVersion="1.1.0">
  <groupId>com.example</groupId>
  <artifactId>myapp</artifactId>
  <versioning>
    <latest>1.2.0</latest>
    <release>1.2.0</release>
    <versions>
      <version>1.0.0</version>
      <version>1.1.0</version>
      <version>1.2.0</version>
      <version>1.1.0-SNAPSHOT</version>
    </versions>
    <lastUpdated>20231215143022</lastUpdated>
  </versioning>
</metadata>

Get Group Metadata

List all artifacts in a group:

bash

curl -u "<username>:<password>" \
     "https://<host>/repositories/<storage>/<repository>/<groupId>/maven-metadata.xml"

Upload Operations

Upload Main Artifact

Upload the primary JAR file:

bash

curl -X PUT \
     -u "<username>:<password>" \
     -T "myapp-1.0.0.jar" \
     "https://<host>/repositories/<storage>/<repository>/<groupId>/<artifactId>/<version>/<artifactId>-<version>.jar"

Upload Sources

Upload source JAR:

bash

curl -X PUT \
     -u "<username>:<password>" \
     -T "myapp-1.0.0-sources.jar" \
     "https://<host>/repositories/<storage>/<repository>/<groupId>/<artifactId>/<version>/<artifactId>-<version>-sources.jar"

Upload Javadoc

Upload Javadoc JAR:

bash

curl -X PUT \
     -u "<username>:<password>" \
     -T "myapp-1.0.0-javadoc.jar" \
     "https://<host>/repositories/<storage>/<repository>/<groupId>/<artifactId>/<version>/<artifactId>-<version>-javadoc.jar"

Upload Classified Artifact

Upload artifact with custom classifier:

bash

curl -X PUT \
     -u "<username>:<password>" \
     -T "myapp-1.0.0-linux.jar" \
     "https://<host>/repositories/<storage>/<repository>/<groupId>/<artifactId>/<version>/<artifactId>-<version>-linux.jar"

Upload POM File

Upload project metadata:

bash

curl -X PUT \
     -u "<username>:<password>" \
     -T "pom.xml" \
     "https://<host>/repositories/<storage>/<repository>/<groupId>/<artifactId>/<version>/<artifactId>-<version>.pom"

Upload Version Metadata

Upload version-specific metadata:

bash

curl -X PUT \
     -u "<username>:<password>" \
     -H "Content-Type: application/xml" \
     -d @version-metadata.xml \
     "https://<host>/repositories/<storage>/<repository>/<groupId>/<artifactId>/<version>/maven-metadata.xml"

Upload Artifact Metadata

Upload artifact-level metadata:

bash

curl -X PUT \
     -u "<username>:<password>" \
     -H "Content-Type: application/xml" \
     -d @artifact-metadata.xml \
     "https://<host>/repositories/<storage>/<repository>/<groupId>/<artifactId>/maven-metadata.xml"

Complete Upload Workflow

Single Artifact Upload Sequence

bash

#!/bin/bash
HOST="https://nitro.example.com"
STORAGE="storage"
REPO="maven-repo"
GROUP="com/example"
ARTIFACT="myapp"
VERSION="1.0.0"
USER="username"
PASS="password"

# Upload main JAR
curl -X PUT \
     -u "${USER}:${PASS}" \
     -T "target/${ARTIFACT}-${VERSION}.jar" \
     "${HOST}/repositories/${STORAGE}/${REPO}/${GROUP}/${ARTIFACT}/${VERSION}/${ARTIFACT}-${VERSION}.jar"

# Upload POM
curl -X PUT \
     -u "${USER}:${PASS}" \
     -T "pom.xml" \
     "${HOST}/repositories/${STORAGE}/${REPO}/${GROUP}/${ARTIFACT}/${VERSION}/${ARTIFACT}-${VERSION}.pom"

# Upload sources (optional)
curl -X PUT \
     -u "${USER}:${PASS}" \
     -T "target/${ARTIFACT}-${VERSION}-sources.jar" \
     "${HOST}/repositories/${STORAGE}/${REPO}/${GROUP}/${ARTIFACT}/${VERSION}/${ARTIFACT}-${VERSION}-sources.jar"

# Update artifact metadata
curl -X PUT \
     -u "${USER}:${PASS}" \
     -H "Content-Type: application/xml" \
     -d @maven-metadata.xml \
     "${HOST}/repositories/${STORAGE}/${REPO}/${GROUP}/${ARTIFACT}/maven-metadata.xml"

Maven Deploy Plugin Integration

The Maven deploy plugin automatically handles the upload sequence:

bash

mvn deploy \
  -DrepositoryId=nitro-repo \
  -Durl=https://nitro.example.com/repositories/storage/maven-repo \
  -Dusername=your-username \
  -Dpassword=your-password

Proxy Repository Operations

Proxy Route Configuration

Configure upstream repositories for proxy mode:

json

{
  "type": "Proxy",
  "proxy": {
    "routes": [
      {
        "url": "https://repo.maven.apache.org/maven2",
        "name": "Maven Central",
        "priority": 10
      },
      {
        "url": "https://repo1.maven.org/maven2",
        "name": "Maven Central Mirror",
        "priority": 5
      }
    ]
  }
}

Proxy Cache Bypass

Force refresh from upstream repositories:

bash

curl -u "<username>:<password>" \
     -H "Cache-Control: no-cache" \
     "https://<host>/repositories/<storage>/<repository>/<groupId>/<artifactId>/<version>/<artifactId>-<version>.jar"

Repository Management API

List Cached Packages

List cached Maven artifacts:

bash

curl -H "Authorization: Bearer <token>" \
     "https://<host>/api/repository/<repository-id>/packages?page=1&per_page=50"

Delete Cached Artifacts

Remove cached artifacts (requires repository edit permission):

bash

curl -X DELETE \
     -H "Authorization: Bearer <token>" \
     -H "Content-Type: application/json" \
     -d '{"paths": ["com/example/myapp/1.0.0/myapp-1.0.0.jar"]}' \
     "https://<host>/api/repository/<repository-id>/packages"

Repository Configuration

Get Maven repository configuration:

bash

curl -H "Authorization: Bearer <token>" \
     "https://<host>/api/repository/<repository-id>/config/maven"

Update repository configuration:

bash

curl -X PUT \
     -H "Authorization: Bearer <token>" \
     -H "Content-Type: application/json" \
     -d @config.json \
     "https://<host>/api/repository/<repository-id>/config/maven"

Repository Statistics

Get repository usage statistics:

bash

curl -H "Authorization: Bearer <token>" \
     "https://<host>/api/repository/<repository-id>/stats"

Response:

json

{
  "total_artifacts": 234,
  "total_versions": 567,
  "storage_used": "3.2GB",
  "last_activity": "2023-12-15T15:30:00Z",
  "top_artifacts": [
    {"name": "com.example:myapp", "version_count": 12},
    {"name": "com.company:library", "version_count": 8}
  ],
  "download_stats": {
    "total_downloads": 15234,
    "unique_artifacts": 89
  }
}

Authentication and Security

Basic Authentication

All write operations require authentication:

bash

curl -u "username:password" \
     "https://<host>/repositories/<storage>/<repository>/com/example/myapp/1.0.0/myapp-1.0.0.jar"

Project-Based Access Control

If must_be_project_member is enabled, users must be project members:

bash

# Check project membership (for debugging)
curl -H "Authorization: Bearer <token>" \
     "https://<host>/api/project/myproject/members"

Token-Based Authentication

API endpoints use Bearer token authentication:

bash

curl -H "Authorization: Bearer <token>" \
     "https://<host>/api/repository/<repository-id>/stats"

Error Responses

Common Error Codes

401 Unauthorized - Authentication required or invalid credentials
403 Forbidden - Insufficient permissions or not a project member
404 Not Found - Artifact, metadata, or repository does not exist
409 Conflict - Version already exists and overwrite not allowed
422 Unprocessable Entity - Invalid POM or metadata format
500 Internal Server Error - Server-side error during upload

Error Response Format

json

{
  "error": "Authentication failed",
  "message": "Invalid username or password provided",
  "details": {
    "repository": "maven-repo",
    "path": "com/example/myapp/1.0.0/myapp-1.0.0.jar"
  }
}

Maven Integration Examples

Gradle Integration

groovy

repositories {
    maven {
        url 'https://nitro.example.com/repositories/storage/maven-repo'
        credentials {
            username = System.getenv('NITRO_USERNAME')
            password = System.getenv('NITRO_PASSWORD')
        }
    }
}

publishing {
    publications {
        mavenJava(MavenPublication) {
            from components.java
        }
    }
    repositories {
        maven {
            url 'https://nitro.example.com/repositories/storage/maven-repo'
            credentials {
                username = System.getenv('NITRO_USERNAME')
                password = System.getenv('NITRO_PASSWORD')
            }
        }
    }
}

SBT Integration

scala

// build.sbt
publishTo := Some("Nitro Repo" at "https://nitro.example.com/repositories/storage/maven-repo")

credentials += Credentials(
  "Nitro Repo",
  "nitro.example.com",
  System.getenv("NITRO_USERNAME"),
  System.getenv("NITRO_PASSWORD")
)

resolvers += "Nitro Repo" at "https://nitro.example.com/repositories/storage/maven-repo"

Leiningen (Clojure) Integration

clojure

;; project.clj
:repositories [["nitro-repo" {:url "https://nitro.example.com/repositories/storage/maven-repo"
                              :username [:env/nitro-username]
                              :password [:env/nitro-password]}]]

:deploy-repositories [["releases" {:url "https://nitro.example.com/repositories/storage/maven-repo"
                                   :username [:env/nitro-username]
                                   :password [:env/nitro-password]}]]

Use these endpoints as a foundation for Maven client integration, build tool configuration, or custom tooling when working with Nitro Repo Maven repositories.

Complete reference for Maven repository HTTP routes. See Maven Quick Reference for usage examples and configuration.

Maven Repository HTTP Routes ​

Artifact Download Operations ​

Download Main Artifact ​

Download Sources ​

Download Javadoc ​

Download Classified Artifact ​

Download POM File ​

Metadata Operations ​

Get Version Metadata ​

Get Artifact Metadata ​

Get Group Metadata ​

Upload Operations ​

Upload Main Artifact ​

Upload Sources ​

Upload Javadoc ​

Upload Classified Artifact ​

Upload POM File ​

Upload Version Metadata ​

Upload Artifact Metadata ​

Complete Upload Workflow ​

Single Artifact Upload Sequence ​

Maven Deploy Plugin Integration ​

Proxy Repository Operations ​

Proxy Route Configuration ​

Proxy Cache Bypass ​

Repository Management API ​

List Cached Packages ​

Delete Cached Artifacts ​

Repository Configuration ​

Repository Statistics ​

Authentication and Security ​

Basic Authentication ​

Project-Based Access Control ​

Token-Based Authentication ​

Error Responses ​

Common Error Codes ​

Error Response Format ​

Maven Integration Examples ​

Gradle Integration ​

SBT Integration ​

Leiningen (Clojure) Integration ​

Maven Repository HTTP Routes

Artifact Download Operations

Download Main Artifact

Download Sources

Download Javadoc

Download Classified Artifact

Download POM File

Metadata Operations

Get Version Metadata

Get Artifact Metadata

Get Group Metadata

Upload Operations

Upload Main Artifact

Upload Sources

Upload Javadoc

Upload Classified Artifact

Upload POM File

Upload Version Metadata

Upload Artifact Metadata

Complete Upload Workflow

Single Artifact Upload Sequence

Maven Deploy Plugin Integration

Proxy Repository Operations

Proxy Route Configuration

Proxy Cache Bypass

Repository Management API

List Cached Packages

Delete Cached Artifacts

Repository Configuration

Repository Statistics

Authentication and Security

Basic Authentication

Project-Based Access Control

Token-Based Authentication

Error Responses

Common Error Codes

Error Response Format

Maven Integration Examples

Gradle Integration

SBT Integration

Leiningen (Clojure) Integration