Develop Reference

Get Cookie By name after a restTemplate call

I'm sending a request ro a service that set a cookie in the response :
HttpEntity<String> response = restTemplate.exchange
(myUrl,
HttpMethod.GET,
new HttpEntity<>(headers),
String.class);
I found that I can extract the cookie using this line of code :
String set_cookie = response.getHeaders().getFirst(HttpHeaders.SET_COOKIE);
However this returns: name_of_cookie=value_of_cookie
I know that I can make a String processing to extract the value of the cookie by name, but I want to find a better solution in the manner of :
response.getHeaders().getCookieValueByName(cookie_name)
The getCookieValueByName function do not exsist. Is there a function that does what I want to do ?

Jersey QueryParam is received as null

I am creating a Jersey web service with dropwizard. The client is using JsonP for cross domain ajax messages.
I got a resource method which looks like this:
#Path("/addUser")
#GET
#UnitOfWork
public String registerPortalUser(#Context HttpServletRequest req, #QueryParam("callback") String callback, #QueryParam("thedata") MyClass recordData) throws Throwable
{ .. }
I get the callback parameter as I expect, but instead of receiving a single Json string which is supposed to be injected to the MyClass member, I get many parameters which are all the MyClass member names and its values. Meaning, instead of receiving everything as a single Json string, I get all the members apart.
What can cause this?

The issue was with the client.
The client sent a json like this:
var thedata =
{
member1 = "value1",
member2 = "value2"
}
What solved it was sending it like this:
var thedata=
[ thedata:
{
member1 = "value1",
member2 = "value2"
}
]
After changing it, Jersey recognized it as the requested parameter

You're apparently sending a null MyClass object to the server. Your client code might look like
MyClass myC = new MyClass();
//populate MyClass fields
WebTarget target = client.target(UriBuilder.fromUri("http://localhost:8088/YourWebApp").build());
String res =(String) target.path("addUser").queryParam("thedata", myC).request().accept(MediaType.TEXT_PLAIN).get(String.class);

Spring RestTemplate: sending array / list of String in GET request

I'm trying to send a array / list of String to my REST server through Spring RestTemplate.
This is on my android side:
private List<String> articleids = new ArrayList<>();
articleids.add("563e5aeb0eab252dd4368ab7");
articleids.add("563f2dbd9bb0152bb0ea058e");
final String url = "https://10.0.3.2:5000/getsubscribedarticles";
UriComponentsBuilder builder = UriComponentsBuilder.fromHttpUrl(url)
.queryParam("articleids", articleids);
java.net.URI builtUrl = builder.build().encode().toUri();
Log.e("builtUrl", builtUrl.toString());
The builtUrl is: https://10.0.3.2:5000/getsubscribedarticles?articleids=%5B563e5aeb0eab252dd4368ab7,%20563f2dbd9bb0152bb0ea058e%5D
On the server side:
#RequestMapping(value = "/getsubscribedarticles", method = RequestMethod.GET)
public List<Posts> getSubscribedPostFeed(#RequestParam("articleids") List<String> articleids){
for (String articleid : articleids {
logger.info(" articleid : " + articleid);
}
}
The server logs:
.13:11:35.370 [http-nio-8443-exec-5] INFO c.f.s.i.ServiceGatewayImpl
- articleid : [563e5aeb0eab252dd4368ab7
.13:11:35.370 [http-nio-8443-exec-5] INFO c.f.s.i.ServiceGatewayImpl
- articleid : 563f2dbd9bb0152bb0ea058e]
Which I can see is wrong as the list should not have a '[' on the first item and a ']' on the last item.
I have read this thread How to pass List or String array to getForObject with Spring RestTemplate but it does not actually answer the question.
The selected answer issues out a POST request, but I want to do a GET request , also it requires an additional object to work to hold the list and I would prefer to not create extra objects if I can do it with Spring RestTemplate natively.

Using Java 8, this worked for me :
UriComponentsBuilder builder = fromHttpUrl(url);
builder.queryParam("articleids", String.join(",", articleids));
URI uri = builder.build().encode().toUri();
It forms the URL like:
https://10.0.3.2:5000/getsubscribedarticles?articleids=123,456,789

I would expect that the correct working url is something like:
https://10.0.3.2:5000/getsubscribedarticles?articleids[]=123&articleids[]=456&articleids[]=789
After a quick look at the code of public UriComponentsBuilder queryParam(String name, Object... values), I would solve it by using UriComponentsBuilder this way:
UriComponentsBuilder builder = UriComponentsBuilder.fromHttpUrl(url)
.queryParam("articleids[]", articleids.toArray(new String[0]));
It is important that, the second parameter is an array but not an Object/Collection!

You did everything correct. You just need to call it without the [].
Just invoke it with .../getsubscribedarticles/articleids=foo,bar,42
I tested this with Spring Boot 1.2.6 and it works like this.

Thanks to dOx for his suggestion - I managed to solve this with the PathVariable - i set the list in my url for android:
final String url = "https://10.0.3.2:5000/getsubscribedarticles/"+new ArrayList<>(articleids);
For my rest server:
#RequestMapping(value = "/getsubscribedarticles/[{articleids}]", method = RequestMethod.GET)
public List<Posts> getSubscribedPostFeed(#PathVariable String[] articleids){
}

Retrieve path parameters with Jersey from the request object

I have a REST API call using Jersey, like this:
#GET
#Consumes(MediaType.MULTIPART_FORM_DATA)
#Produces(MediaType.APPLICATION_JSON)
#Path("/get/{version}")
public String getData(#PathParam("version") String version, FormDataMultiPart request) {
// My code here
}
The fact is that I want both:
1) The version set into the URL (like it is now)
2) The version retrieved from the request object.
I don't want to have two separate inputs.
Is there a way I can achieve this?

Assuming you are firing a request using jQuery and AJAX, this is how you can do it:
var vesrion = <retrieve vesrion>
var requestURL = "http://required.url/" + version
$.ajax({
type : 'POST',
url : rquestURL,
cache:false,
processData:false,
contentType:false,
data : new FormData($("#"+formId)[0]) // 'formId' will be the ID of your form
}) ..
This is how you can pass both path param and form data together.

How to get STRING response from RestTemplate postForLocation?

I'm creating a REST Client in Java with RestTemplate from Spring Framework.
Everything is fine until i have to do a post with postForLocation.
The webservice i'm having access return a json with informations about the POST ACTION.
In PHP it's fine but i really don't understand how to do in Java with RestTemplate.
public String doLogin()
{
Map<String, String> args = new HashMap<String, String>();
args.put("email", AUTH_USER);
args.put("token", AUTH_PASS);
String result = restTemplate.postForLocation(API_URL + "account/authenticate/?email={email}&token={token}", String.class, args);
return result;
}
This returns NULL.
With same code but using getForObject (and of course, changing the URL to something right) I have a full response, i.e. this works:
String result = restTemplate.getForObject(url, String.class);
So... how get the RESPONSE from a postForLocation?
Obs.: Sorry if this question is dumb. I'm beginner in Java

The postForLocation method returns the value for the Location header. You should use postForObject with the String class, which returns the server's response.
So like this:
String result = restTemplate.postForObject(API_URL + "account/authenticate/?email={email}&token={token}", String.class, args);
This will return the response as a string.

Thanks to one of answers i've figured out how get the response from a POST with Spring by using the postForObject
String result = restTemplate.postForObject(API_URL + "account/authenticate/?email="+ AUTH_USER +"&token="+ AUTH_PASS, null, String.class);
For some reason i can't use arguments with MAP and have to put them inline in URL. But that's fine for me.