Oxigraph Server is a standalone HTTP server providing a graph database implementing the SPARQL standard.
Its goal is to provide a compliant, safe, and fast graph database based on the RocksDB key-value store. It is written in Rust. It also provides a set of utility functions for reading, writing, and processing RDF files.
Oxigraph is in heavy development and SPARQL query evaluation has not been optimized yet.
Oxigraph provides three different installation methods for Oxigraph server.
* cargo install (multiplatform)
* A Docker image
* A Homebrew formula
It is also usable as a Rust library and as a Python library.
Oxigraph implements the following specifications: * SPARQL 1.1 Query, SPARQL 1.1 Update, and SPARQL 1.1 Federated Query. * Turtle, TriG, N-Triples, N-Quads, and RDF XML RDF serialization formats for both data ingestion and retrieval using the Rio library. * SPARQL Query Results XML Format, SPARQL 1.1 Query Results JSON Format and SPARQL 1.1 Query Results CSV and TSV Formats. * SPARQL 1.1 Protocol and SPARQL 1.1 Graph Store HTTP Protocol.
A preliminary benchmark is provided.
You need to have a recent stable version of Rust and Cargo installed.
To download, build and install the latest released version run cargo install oxigraph_server.
There is no need to clone the git repository.
To compile the server from source, clone this git repository including its submodules (git clone --recursive https://github.com/oxigraph/oxigraph.git), and execute cargo build --release in the server directory to compile the full server after having downloaded its dependencies.
It will create a fat binary in target/release/oxigraph_server.
Run oxigraph_server --location my_data_storage_directory serve to start the server where my_data_storage_directory is the directory where you want Oxigraph data to be stored. It listens by default on localhost:7878.
The server provides an HTML UI, based on YASGUI, with a form to execute SPARQL requests.
It provides the following REST actions:
* /query allows evaluating SPARQL queries against the server repository following the SPARQL 1.1 Protocol.
For example:
bash
curl -X POST -H 'Content-Type:application/sparql-query' \
--data 'SELECT * WHERE { ?s ?p ?o } LIMIT 10' http://localhost:7878/query
This action supports content negotiation and could return Turtle, N-Triples, RDF XML, SPARQL Query Results XML Format and SPARQL Query Results JSON Format.
* /update allows to execute SPARQL updates against the server repository following the SPARQL 1.1 Protocol.
For example:
sh
curl -X POST -H 'Content-Type: application/sparql-update' \
--data 'DELETE WHERE { <http://example.com/s> ?p ?o }' http://localhost:7878/update
* /store allows to retrieve and change the server content using the SPARQL 1.1 Graph Store HTTP Protocol.
For example:
sh
curl -f -X POST -H 'Content-Type:application/n-triples' \
-T MY_FILE.nt "http://localhost:7878/store?graph=http://example.com/g"
will add the N-Triples file MY_FILE.nt to the server dataset inside of the http://example.com/g named graph.
Turtle, N-Triples and RDF XML are supported.
It is also possible to POST, PUT and GET the complete RDF dataset on the server using RDF dataset formats (TriG and N-Quads) against the /store endpoint.
For example:
sh
curl -f -X POST -H 'Content-Type:application/n-quads' \
-T MY_FILE.nq http://localhost:7878/store
will add the N-Quads file MY_FILE.nq to the server dataset.
Use oxigraph_server --help to see the possible options when starting the server.
It is also possible to load RDF data offline using bulk loading:
oxigraph_server --location my_data_storage_directory load --file my_file.nq
sh
docker run --rm oxigraph/oxigraph --help
Expose the server on port 7878 of the host machine, and save data on the local ./data folder
sh
docker run --rm -v $PWD/data:/data -p 7878:7878 oxigraph/oxigraph --location /data serve --bind 0.0.0.0:7878
You can then access it from your machine on port 7878:
```sh
firefox http://localhost:7878
curl http://localhost:7878/store?default -H 'Content-Type: text/turtle' -T ./data.ttl
curl -X POST -H 'Accept: application/sparql-results+json' -H 'Content-Type: application/sparql-query' --data 'SELECT * WHERE { ?s ?p ?o } LIMIT 10' http://localhost:7878/query
curl -X POST -H 'Content-Type: application/sparql-update' --data 'DELETE WHERE { http://example.com/s ?p ?o }' http://localhost:7878/update ```
It can be useful to make Oxigraph SPARQL endpoint available publicly, with a layer of authentication on /update to be able to add data.
You can do so by using a nginx basic authentication in an additional docker container with docker-compose. First create a nginx.conf file:
nginx
daemon off;
events {
worker_connections 1024;
}
http {
server {
server_name localhost;
listen 7878;
rewrite ^/(.*) /$1 break;
proxy_ignore_client_abort on;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header Host $http_host;
proxy_set_header Access-Control-Allow-Origin "*";
location ~ ^(/|/query)$ {
proxy_pass http://oxigraph:7878;
proxy_pass_request_headers on;
}
location ~ ^(/update|/store)$ {
auth_basic "Oxigraph Administrator's Area";
auth_basic_user_file /etc/nginx/.htpasswd;
proxy_pass http://oxigraph:7878;
proxy_pass_request_headers on;
}
}
}
Then a docker-compose.yml in the same folder, you can change the default user and password in the environment section:
```yaml version: "3" services: oxigraph: image: ghcr.io/oxigraph/oxigraph:latest ## To build from local source code: # build: # context: . # dockerfile: server/Dockerfile volumes: - ./data:/data
nginx-auth: image: nginx:1.21.4 environment: - OXIGRAPHUSER=oxigraph - OXIGRAPHPASSWORD=oxigraphy volumes: - ./nginx.conf:/etc/nginx/nginx.conf ## For multiple users: uncomment this line to mount a pre-generated .htpasswd # - ./.htpasswd:/etc/nginx/.htpasswd ports: - "7878:7878" entrypoint: "bash -c 'echo -n $OXIGRAPHUSER: >> /etc/nginx/.htpasswd && echo $OXIGRAPHPASSWORD | openssl passwd -stdin -apr1 >> /etc/nginx/.htpasswd && /docker-entrypoint.sh nginx'" ```
Once the docker-compose.yaml and nginx.conf are ready, start the Oxigraph server and nginx proxy for authentication on http://localhost:7878:
sh
docker-compose up
Then it is possible to update the graph using basic authentication mechanisms. For example with curl: change $OXIGRAPH_USER and $OXIGRAPH_PASSWORD, or set them as environment variables, then run this command to insert a simple triple:
sh
curl -X POST -u $OXIGRAPH_USER:$OXIGRAPH_PASSWORD -H 'Content-Type: application/sparql-update' --data 'INSERT DATA { <http://example.com/s> <http://example.com/p> <http://example.com/o> }' http://localhost:7878/update
In case you want to have multiple users, you can comment the entrypoint: line in the docker-compose.yml file, uncomment the .htpasswd volume, then generate each user in the .htpasswd file with this command:
sh
htpasswd -Bbn $OXIGRAPH_USER $OXIGRAPH_PASSWORD >> .htpasswd
You could easily build your own Docker image by cloning this repository with its submodules, and going to the root folder:
sh
git clone --recursive https://github.com/oxigraph/oxigraph.git
cd oxigraph
Then run this command to build the image locally:
sh
docker build -t oxigraph/oxigraph -f server/Dockerfile .
Oxigraph maintains a Homebrew formula in a custom tap.
To install Oxigraph server using Homebrew do:
sh
brew tap oxigraph/oxigraph
brew install oxigraph
It installs the oxigraph_server binary. See the usage documentation to know how to use it.
oxigraph_server serve --location MY_STORAGE instead of oxigraph_server --file MY_STORAGE.oxigraph_server load --location MY_STORAGE --file MY_FILE. The file format is guessed from the extension (.nt, .ttl, .nq...).Feel free to use GitHub discussions or the Gitter chat to ask questions or talk about Oxigraph. Bug reports are also very welcome.
If you need advanced support or are willing to pay to get some extra features, feel free to reach out to Tpt.
This project is licensed under either of
at your option.
Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in Oxigraph by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.