Generally speaking, this is the configuration file of web applications in java. It instructs the servlet container (tomcat for ex.) which classes to load, what parameters to set in the context, and how to intercept requests coming from browsers. There you specify: what servlets (and filters) you want to use and what URLs you want … Read more
If you do not want tomcat to show an error page, then do not use sendError(…). Instead use setStatus(…). e.g. if you want to give a 405 response, then you do response.setStatus(HttpServletResponse.SC_METHOD_NOT_ALLOWED); response.getWriter().println(“The method ” + request.getMethod() + ” is not supported by this service.”); Also remember not to throw any Exceptions from your servlet. … Read more
HttpSerlvetRequest.isSecure() is the answer. The ServletContainer is responsible for returning true in the following cases: If the ServletContainer can itself accept requests on https. If there is a LoadBalancer in front of ServletContainer. And , the LoadBlancer has got the request on https and has dispatched the same to the ServletContainer on plain http. In … Read more
Spring’s InputStreamResource works well. You need to set the Content-Length manually, or it appears that Spring attempts to read the stream to obtain the Content-Length. InputStreamResource inputStreamResource = new InputStreamResource(inputStream); httpHeaders.setContentLength(contentLengthOfStream); return new ResponseEntity(inputStreamResource, httpHeaders, HttpStatus.OK); I never found any web pages suggesting using this class. I only guessed it because I noticed there were … Read more
redirect sets the response status to 302 [1], and the new url in a Location header, and sends the response to the browser. Then the browser, according to the http specification, makes another request to the new url forward happens entirely on the server. The servlet container just forwards the same request to the target … Read more
try this: public static String getClientIpAddr(HttpServletRequest request) { String ip = request.getHeader(“X-Forwarded-For”); if (ip == null || ip.length() == 0 || “unknown”.equalsIgnoreCase(ip)) { ip = request.getHeader(“Proxy-Client-IP”); } if (ip == null || ip.length() == 0 || “unknown”.equalsIgnoreCase(ip)) { ip = request.getHeader(“WL-Proxy-Client-IP”); } if (ip == null || ip.length() == 0 || “unknown”.equalsIgnoreCase(ip)) { ip = … Read more
Note: I find it hard to think of any “hidden features” for JSP/Servlet. In my opinion “best practices” is a better wording and I can think of any of them. It also really depends on your experience with JSP/Servlet. After years of developing you don’t see those “hidden features” anymore. At any way, I’ll list … Read more
Technically, I believe the servlet container is allowed to “passivate” the servlet object to disk, in a similar way that EJB session beans can be. So you’re correct to ask the question if your app will fail due to non-serializable fields. In practise, I’ve never heard of a container doing this, so it’s really just … Read more
If your actual concern is the dynamicness of the webapp context (the “AppName” part), then just retrieve it dynamically by HttpServletRequest#getContextPath(). <head> <link rel=”stylesheet” href=”https://stackoverflow.com/questions/4764405/${pageContext.request.contextPath}/templates/style/main.css” /> <script src=”${pageContext.request.contextPath}/templates/js/main.js”></script> <script>var base = “${pageContext.request.contextPath}”;</script> </head> <body> <a href=”${pageContext.request.contextPath}/pages/foo.jsp”>link</a> </body> If you want to set a base path for all relative links so that you don’t need to … Read more
Here it is how to use MockHttpServletRequest: // given MockHttpServletRequest request = new MockHttpServletRequest(); request.setServerName(“www.example.com”); request.setRequestURI(“/foo”); request.setQueryString(“param1=value1¶m”); // when String url = request.getRequestURL() + ‘?’ + request.getQueryString(); // assuming there is always queryString. // then assertThat(url, is(“http://www.example.com:80/foo?param1=value1¶m”));