java - How to return TIFF image from remote api using multiple header parameters -

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i'm creating spring application access remote api returns tiff image. api expecting few parameters send in header. i'm attempting following code examples i've found.. when return responseentity respond, it's of 0 length , byte[] respond null.

{content-length=[0], content-type=[application/octet-stream], server=[microsoft-iis/7.5], x-powered-by=[asp.net], date=[wed, 19 aug 2015 15:14:17 gmt]}

    list<httpmessageconverter<?>> messageconverters = new    arraylist<httpmessageconverter<?>>();     messageconverters.add(new bytearrayhttpmessageconverter());      resttemplate resttemplate = new resttemplate(messageconverters);     httpheaders headers = new httpheaders();      headers.set("accept", "application/octet-stream");      uricomponentsbuilder builder = uricomponentsbuilder.fromhttpurl("http://webservices.imagestorehouse.com/getdata.svc/getdocs")             .queryparam("token", "a80d4978c12549dbafcd1922c1efdaa5")             .queryparam("company_id", "sw1112b")             .queryparam("document", "1" )             .queryparam("field_1", "2627594")             .queryparam("field_4", "028000");      httpentity<string> entity = new httpentity<string>(headers);     //responseentity<byte[]> respond = resttemplate.execute(builder.build().encode().touri(), httpmethod.get, entity, byte[].class);     byte[] respond = resttemplate.getforobject(builder.build().encode().touri(), byte[].class);

you need add few more parameters in response header. 

header.setcontentlength(respond.length); //also set content type accordingly //header.setcontenttype(new mediatype("application", "xml"));

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