Level 8

UTF-8 fix breaks content-type headers?

Forum|Forum|4 years ago
May 25, 2021
2 replies
4850 views

By default, AEM queryBuilder, which is how servlets can lookup content, responds with the data encoded in iso-8859 char set instead of the required UTF-8. The solution, which seems improbable, but works, is to create /osgiconfig/config/org.apache.sling.engine.impl.SlingMainServlet.cfg.json file with the following content:

{
"sling.additional.response.headers":[
  "X-Content-Type-Options=nosniff",
  "Content-Type=text/html;charset=utf-8",
  "X-Frame-Options=SAMEORIGIN"
  ]
}

This fixes the queryBuilder returning data with the wrong charset in the servlet, but has the side effect of making the response header always "text/html". We want our servlets, which are used by the front end to search for and pull page pages as json, to have a content-type of application/json. however, if we change the above file, it will then break AEM.

We tried overriding the content type in the servlet itself, but this gets ignored (or overwritten).

Any ideas how to support both UTF-8 and application/json just for our servlets?

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Asutosh_Jena_

Community Advisor

Hi @tb3dock

Please check "Apache Sling Request Parameter Handling" configuration in /system/console/configMgr and see what value "sling.default.parameter.encoding" property is holding. If it's set to "ISO-8859-1" please change it to "UTF-8"

Default value should be "UTF-8".

T

TB3dockAuthor

Level 8

Hi this is for parameter encoding, so has nothing to do with the servlet response I believe. This value was set to UTF-8 when we started.

M

mauricio_rodri2

+1 having the same issue. Could solve this using the code below (be sure to maintain the order! doesn't take the value otherwise):

response.setStatus(statusCode);
response.setContentType(ContentTypeUtil.TYPE_JSON);
response.setCharacterEncoding(CharEncoding.UTF_8);
response.getWriter().write(json.toString());