Adding multiple headers while calling REST api via Jersey clients

Question

I am trying to add multiple header. But failed miserably so far. I had tried lots of code tweaking but failed. Can someone help me fix the code or at least tell me what's wrong ?

Header mapping code:

    Map<String, String> headers = new HashMap<String, String>();

    headers.put("authorization", authToken);
    headers.put("API-Version", apiVersion);
    headers.put("Content-Type", MediaType.APPLICATION_JSON);

actual calling code:

    String serviceUrl = serviceHostUrl;
    Client client = Client.create();
    WebResource webResource = client.resource(serviceUrl).path(path);

    WebResource.Builder builder = webResource.getRequestBuilder();
    if(headers != null && !headers.isEmpty()) {
        for(Map.Entry<String, String> entry : headers.entrySet()) {
            builder.header(entry.getKey(), entry.getValue());
        }
    }

    ClientResponse response = builder.post(ClientResponse.class, input);

UPDATE

if in second snippet I use below code instead of setting headers in loop, it works fine. That's really weird.

    builder.header("authorization", "Basic SDFSFSDFSDFSDFSDFSDFSDF");
    builder.header("API-Version", "5.2");
    builder.header("Content-Type", MediaType.APPLICATION_JSON);

Answer 1

I think the issue here is, type of MAP that you are trying to access.

Map<String, Object> headers = new HashMap<String, Object>();

The WebSource builder accepts header(String,Object). So Try with changing the map type.

Answer 2

Basic auth is like: Authorization = "Authorization" ":" credentials

an example

byte[] loginBytes = ("1" + ":" + "1").getBytes();
StringBuilder authString = new StringBuilder().append("Basic ")
                .append(Base64.encodeToString(loginBytes, Base64.NO_WRAP));

_headers.put("Authorization", authString );