IPNS - Publish a CID

Hello, I’m currently trying to replicate the following behavior with java-ipfs-api:

Add a DAG node to IPFS

$ echo '{"name":"blogpost","documents":[]}'|ipfs dag put
zdpuAknRh1Kro2r2xBDKiXyTiwA3Nu5XcmvjRPA1VNjH41NF7

Publish the CID of the DAG Object to an IPNS namespace

$ ipfs name publish zdpuAknRh1Kro2r2xBDKiXyTiwA3Nu5XcmvjRPA1VNjH41NF7 --key=test-dag
Published to QmdCSru6FJRp3gYSuAcg64az6mkc7SXhSvEHry8aKUeMwu: /ipfs/zdpuAknRh1Kro2r2xBDKiXyTiwA3Nu5XcmvjRPA1VNjH41NF7

Resolve the IPNS namespace and get the DAG node

$ echo $(ipfs name resolve QmdCSru6FJRp3gYSuAcg64az6mkc7SXhSvEHry8aKUeMwu) | ipfs dag get
{"documents":[],"name":"blogpost"}

---

Using java-ipfs-api, I’m doing

1. Running a go-ipfs node

$ ipfs daemon

1. Executing the following code

    @Test
    public void issue() throws Exception {
        
        try { 
            IPFS ipfs = new IPFS("localhost", 5001);
            
            // JSON document
            String json = "{\"name\":\"blogpost\",\"documents\":[]}";
            log.info("json: {}", json);
            
            // Add a DAG node to IPFS
            MerkleNode merkleNode = ipfs.dag.put("json", json.getBytes());
            log.info("store [json: {}] - {}", json, merkleNode.toJSON());
            Assert.assertEquals("expected to be zdpuAknRh1Kro2r2xBDKiXyTiwA3Nu5XcmvjRPA1VNjH41NF7" , "zdpuAvQHo4UMMFvGiYJ5yptX4JFZtX77jz457ebwQiToG26TJ", merkleNode.hash.toString());
            
            // Get a DAG node
            byte[] res = ipfs.dag.get(Cid.buildCidV0(merkleNode.hash));
            log.info("fetch({}): {}", merkleNode.hash.toString(), new String(res));
            Assert.assertEquals("Should be equals", json, new String(res));
            
            // Publish to IPNS
            Map result = ipfs.name.publish(merkleNode.hash);
            log.info("result {}", result);
            
            // Resolve from IPNS
            String resolved = ipfs.name.resolve(Multihash.fromBase58((String) result.get("Name")));
            log.info("resolved {}", resolved);
            Assert.assertEquals("Should be equals", resolved, merkleNode.hash.toBase58());
               
        } catch(Exception e) {
            log.error("Error", e);
            throw e;
        }
    }

Unfortunately it failed on the IPNS publication ipfs.name.publish(merkleNode.hash)

09:55:01.578 [main] INFO TestIPNS - json: {"name":"blogpost","documents":[]}
09:55:01.606 [main] INFO TestIPNS - store [json: {"name":"blogpost","documents":[]}] - {Hash=zdpuAvQHo4UMMFvGiYJ5yptX4JFZtX77jz457ebwQiToG26TJ, Links=[], Size=34}
09:55:01.609 [main] INFO TestIPNS - fetch(zdpuAvQHo4UMMFvGiYJ5yptX4JFZtX77jz457ebwQiToG26TJ): {"name":"blogpost","documents":[]}
09:55:01.616 [main] ERROR TestIPNS - Error
java.lang.RuntimeException: IOException contacting IPFS daemon.
Trailer: [X-Stream-Error] {"Message":"unexpected EOF","Code":0,"Type":"error"}

	at io.ipfs.api.IPFS.get(IPFS.java:592)
	at io.ipfs.api.IPFS.retrieve(IPFS.java:571)
	at io.ipfs.api.IPFS.retrieveAndParse(IPFS.java:553)
	at io.ipfs.api.IPFS.retrieveMap(IPFS.java:549)
	at io.ipfs.api.IPFS.access$200(IPFS.java:15)
	at io.ipfs.api.IPFS$Name.publish(IPFS.java:361)
	at io.ipfs.api.IPFS$Name.publish(IPFS.java:357)
	at TestIPNS.issue(TestIPNS.java:41)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
	at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86)
	at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:538)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:760)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:460)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:206)
Caused by: java.io.IOException: Server returned HTTP response code: 500 for URL: http://localhost:5001/api/v0/name/publish?arg=/ipfs/zdpuAvQHo4UMMFvGiYJ5yptX4JFZtX77jz457ebwQiToG26TJ
	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1894)
	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1492)
	at io.ipfs.api.IPFS.get(IPFS.java:580)
	... 30 common frames omitted

The IPFS daemon doesn’t log anything.

I acknowledge the issue might be related to the API itself and not the Java client directly. Still investigating…

[ianopolous]

done

[gjeanmart]

Hey, Thanks for fixing this, I just made a quick test and it works like a charm (except of course that IPNS publishing takes 2min, but that’s a protocol issue I believe).

What’s your Maven release process to get 1.2.1 on available publicly on jitpack ? Let me know if you need some input on Continuous Release management stuff using Maven, Github and Travis.

Closing the issue!