In my case I had to enable CORS-related feature on the server side: Access-Control-Expose-Headers: Content-Disposition This allows javascript on the browser side to read this header. In case of node.js + express + cors on the server side it may looks like this: app.use(cors({ origin: ‘http://localhost:8080’, credentials: true, exposedHeaders: [‘Content-Disposition’] })) So I can see … Read more
You can’t delete headers afterwards by the standard Servlet API. Your best bet is to just prevent the header from being set. You can do this by creating a Filter which replaces the ServletResponse with a custom HttpServletResponseWrapper implementation which skips the setHeader()‘s job whenever the header name is Content-Disposition. Basically: @Override public void doFilter(ServletRequest … Read more
I recently got into this issue and found this solution. You can use a filter to add these headers : import java.io.IOException; import javax.servlet.FilterChain; import javax.servlet.ServletException; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.springframework.web.filter.OncePerRequestFilter; public class CorsFilter extends OncePerRequestFilter { @Override protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain) throws ServletException, IOException { response.addHeader(“Access-Control-Allow-Origin”, “*”); if (request.getHeader(“Access-Control-Request-Method”) … Read more
For adding response headers before send, you can use the setHeader method: response.setHeader(‘Content-Type’, ‘application/json’) The status only by the status method: response.status(status_code) Both at the same time with the writeHead method: response.writeHead(200, {‘Content-Type’: ‘application/json’});
Define “necessary”. It is necessary if you want the browser to know what the type of the file is. PHP automatically sets the Content-Type header to text/html if you don’t override it so your browser is treating it as an HTML file that doesn’t contain any HTML. If your output contained any HTML you’d see … Read more
Node supports the res.headersSent these days, so you could/should use that. It is a read-only boolean indicating whether the headers have already been sent. if(res.headersSent) { … } See http://nodejs.org/api/http.html#http_response_headerssent Note: this is the preferred way of doing it, compared to the older Connect ‘headerSent’ property that Niko mentions.