Connecting to basic alfresco repository using CMIS

Vishruti_Shah — Mon, 21 Dec 2020 07:46:06 GMT

Hi,

I need to connect to the basic alfresco repository using the CMIS API URL using Atompub or browser binding.

I tried connecting to the repository using the URLs provided in the alfresco documentation.

URLs :

http://<hostname>:<port>/alfresco/api/-default-/public/cmis/versions/1.1/atom

http://<hostname>:<port>/alfresco/api/-default-/public/cmis/versions/1.1/browser

But I am facing an error related to http authentication

{
    "status" : 
  {
    "code" : 401,
    "name" : "Unauthorized",
    "description" : "The request requires HTTP authentication."
  },  
  
  "message" : "11210005 Authentication failed for Web Script org\/alfresco\/api\/opencmis\/OpenCMIS.get",  
  "exception" : "",
  
  "callstack" : 
  [ 
  	   
  ],
  
  "server" : "Enterprise v6.2.0 (ra498a911-b5) schema 13,001",
  "time" : "21 Dec 2020, 07:33:37"
}

How can I solve this error, where do I need to auntheticate this?

Re: Connecting to basic alfresco repository using CMIS

sp2 — Mon, 21 Dec 2020 09:59:57 GMT

Try to call with basic authentication.

hereRe: Connecting to basic alfresco repository using CMIS

kaynezhang — Mon, 21 Dec 2020 13:01:07 GMT

Please paste your code here

Re: Connecting to basic alfresco repository using CMIS

abhinavmishra14 — Mon, 21 Dec 2020 19:18:35 GMT

{
    "status" : 
  {
    "code" : 401,
    "name" : "Unauthorized",
    "description" : "The request requires HTTP authentication."
  },  
  
  "message" : "11210005 Authentication failed for Web Script org\/alfresco\/api\/opencmis\/OpenCMIS.get",  
  "exception" : "",
  
  "callstack" : 
  [ 
  	   
  ],
  
  "server" : "Enterprise v6.2.0 (ra498a911-b5) schema 13,001",
  "time" : "21 Dec 2020, 07:33:37"
}

Your error indicates authentication failure, possible that you are using invalid credentials.

There is another good way to work with CMIS api, read this tutorial:

https://ecmarchitect.com/alfresco-developer-series-tutorials/content/tutorial/tutorial.html#cmis-1.0-and-the-alfresco-opencmis-extension-library

Example source code:

https://github.com/jpotts/alfresco-developer-series/tree/master/content/content-tutorial-cmis/src/main/java/com/someco/cmis/examples

On the other hand, either of the URLs should work if you trying to access via some client. As indicated by the folks, you can use basic authentication or alf_ticket (get it using login api) to access the atompub url using any client/java code. Use the httppost request if using basic auth. It is not recommended to use basic auth with httpget in general.

POST http://127.0.0.1:8080/alfresco/api/-default-/public/cmis/versions/1.1/atom

Also refer this doc: https://docs.oasis-open.org/cmis/CMIS/v1.1/errata01/os/CMIS-v1.1-errata01-os-complete.html

this url based on browser binding is meant to be accessed from browser/httpget request. httpPost request is not supported for this url. Hence you can get the alf_ticket and pass along with the url to access the endpoint:

e.g.:

GET http://127.0.0.1:8080/alfresco/api/-default-/public/cmis/versions/1.1/browser?alf_ticket=TICKET_8d8aa27acc731f99c77e3fb670c5c40a6642d039

Some java based httpclient examples for your reference:

public static void main(String[] args) throws ClientProtocolException, IOException {
	//Basic auth example
	CloseableHttpClient httpclient = null;
	try {
		final CredentialsProvider provider = new BasicCredentialsProvider();
                //non admin user
		final UsernamePasswordCredentials credentials = new UsernamePasswordCredentials("testUser", "welcome");
		provider.setCredentials(AuthScope.ANY, credentials);
		httpclient = HttpClientBuilder.create().setDefaultCredentialsProvider(provider).build();
		atomPubTestBasicAuth(httpclient);
	} finally {
		if (httpclient != null) {
			httpclient.close();
		}
	}
	
	//Example via alf_ticket
	browserBindingTest();
}

private static void atomPubTestBasicAuth(final CloseableHttpClient httpclient) throws IOException, ClientProtocolException {
	System.out.println("Invoking atomPubTestBasicAuth..");
        //atompub url example
	final HttpPost httpPost = new HttpPost("http://127.0.0.1:8080/alfresco/api/-default-/public/cmis/versions/1.1/atom");
	try(CloseableHttpResponse httpResp = httpclient.execute(httpPost);) {
		if (httpResp != null) {
			final StatusLine statusLine = httpResp.getStatusLine();
			final String statusMsg = statusLine.getReasonPhrase();
			final int statusCode = statusLine.getStatusCode();
			System.out.println("StatusMsg: "+statusMsg+", StatusCode: "+statusCode);
			if (statusCode == 200) {
				// process further
				
			} else {
				//report error
			}
		}
	}
}

private static void browserBindingTest() throws IOException, ClientProtocolException {
	System.out.println("Invoking browserBindingTest..");
	try (final CloseableHttpClient httpclient = HttpClientBuilder.create().build();) {
                //example browser binding url
		final HttpGet httpGet = new HttpGet("http://127.0.0.1:8080/alfresco/api/-default-/public/cmis/versions/1.1/browser?alf_ticket=TICKET_8d8aa27acc731f99c77e3fb670c5c40a6642d039");
		try(CloseableHttpResponse httpResp = httpclient.execute(httpGet);) {
			if (httpResp != null) {
				final StatusLine statusLine = httpResp.getStatusLine();
				final String statusMsg = statusLine.getReasonPhrase();
				final int statusCode = statusLine.getStatusCode();
				System.out.println("StatusMsg: "+statusMsg+", StatusCode: "+statusCode);
				if (statusCode == 200) {
					// process further					
				} else {
					//report error
				}
			}
		}
	}
}

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