I am using feign to call an endpoint that returns a large binary file, and then I'm using this to get the InputStream:
Response.Body.asInputStream();
Will feign return the Response before the entire file has downloaded, so that I can stream it as it comes in? Or does it wait to return until the entire file is downloaded from the Rest endpoint?
The fact that it provides an InputStream implies to me that it will return before the whole file has downloaded, but I can't find documentation on that.
Related
I need to read gzipped json payload in a POST request in my SPringBoot app which accepts json data. How to do that in order to keep the application generic as there may be other clients in future sending data in plain json or other compression formats? I suppose this should be handled by the server itself so is there any way to instruct the embedded Tomcat to unzip the payload?
My SpringBoot application runs on embedded Tomcat 9.0.17.
The controller accepts JSON payload in a POST request.
#RequestMapping(value = "/update/v1", method = RequestMethod.POST, produces = "application/json", consumes = "application/json")
public ResponseEntity<String> receiveUpdates(#RequestBody String update) {
We recently changed our content provider and the new one is sending payload in "gzip" format (with header content-encoding=gzip) and without any content-type header. As a result it gives the following error
'error': 'Unsupported Media Type', 'message': "Content type '' not supported"
If I change my consume type to MediaType.ALL_VALUE, my controller starts receiving the request but the payload itself is gzipped. I can handle it in my service layer but that would make it specific to gzipped data.
This problem could be solved by introducing a Filter to handle gzipped payload as mentioned here and here.
But I believe there should be a way to instruct the Tomcat to handle this and serve unzipped data.
We are implementing Camel routes to handle service requests.
We have the requirement to deliver a huge response to a certain request. This response can be that large that it may cause memory problems.
For now we write the response in a file, move that file to an external ftp server and return the name and location of the file as the http response.
What I really like to do is to stream the response via the http response in Camel. Unfortunately I could not find any doc/samples on how to do that.
This is our current implementation:
.rest(BASE_URL_VERSION)
.get("/generic/xxxxxx").produces(MIME_MEDIA_TYPE_JSON)
.route()
.process(new ResponseBuilderProcessor()) // this creates the temp file
.to(uriOut) // this moves the file to the external ftp
.process(new AnswerProcessor()); // provides the response where the file location is mentioned
Is this doable? How?
Consider making your service async
If the request is proper make the request as accepted(http 202) & give the client the details of the reponse availability (may be in a JMS queue or the file location as you mentioned) . The queue ID or file location can be send as response .
The client will hit the Queue or file location after a time interval & get the response if it is available .
I need to create a ReST service using Jersey 2.0. I need to send multiple documents and metadata to the client.
What is the best approach do to the achieve this.
I was able to send a MultiPart response from the server , but not sure how to read this from the client code
Let's say you have a document called "document1" which you want to get via your client.
In your REST-API your unique identifier for the document (the resource) could be:
http://example.com/restapi/documents/document1
As you want to READ data you do a HTTP-GET Request to that uri.
And here comes the important part for you: A resource can have multiple representations - meta data and binary data in your case.
So the client has to tell the server which representation type to get (content negotiation). This information can be set in the ACCEPT Header of the client request for instance.
You can use the content type "application/json" as a representation for the meta data.
Unfortunately you didn't tell us what kind of binary data you want to send.
If they are PDFs the content type would be "application/pdf" for instance. If the binary data doesn't have a specific type you can use "application/octet-stream".
Of course there is work to be done on the server side too. Here an example:
#Path("/documents/{documentname}")
public class docResource {
#GET #Produces("application/json")
public Response getDocumentMetaData(#PathParam("documentname") String docName) {
// Create a Response containing a json
}
#GET #Produces("application/pdf")
public Response getDocumentBinaryData(#PathParam("documentname") String docName) {
// Create a response containing the binary data
}
...
}
Jersey will check the accept header of the client and will run the appropriate method.
Also see: https://jersey.java.net/documentation/latest/jaxrs-resources.html
If you are using jersey with jackson you can also easily marshal a POJO to JSON and visa versa:
http://examples.javacodegeeks.com/enterprise-java/rest/jersey/json-example-with-jersey-jackson/
If you are not sure what to do in the "getDocumentBinaryData"-Method - checkout this simple example from mkyong:
http://www.mkyong.com/webservices/jax-rs/download-excel-file-from-jax-rs/
I am trying to produce both xml and json from my rest service.
#Produces({"application/xml", "application/json"})
However, when I try to use the service using curl/SOAPUI, I get back either xml or json depending on which is mentioned first. In simple words, only the first method is considered. Is there a workaround?
You should check this link out - oracle docs for #Produces
The spec says that it does indeed default to the first one if that is acceptable as specified by the media type on the request. You should check your soapUI tool and see what headers you are sending. If they are both being sent you will get a response with the first one listed in your #Produces annotation.
I've generated the web service client in eclipse for the OpenCalais WSDL using the "develop" client type. Actually I was following this post so not really going in detail. Now when I get the results this way: new CalaisLocator().getcalaisSoap().enlighten(key, content, requestParams);, I get the String object, containing the response XML. Sure it's possible to parse that XML, but I think there must be some way to do it automatically, e.g. getting the response object in the form of some list whatsoever?
The response from the SOAP interface is already parsed. The englighten() method returns an XML string. When you call it with SOAP, this response is wrapped within even more XML. The SOAP library already parses the outer SOAP XML and returns the result of the enlighten() method, which is also XML.