I’m trying to add some data to the http header that comes back from a RESTful web service call. Is it possible to use JAX-RS or something else to add data to the response header?
Example of my method:
#GET
#Path("getAssets")
public List<Asset> getAssets(#QueryParam("page") #DefaultValue("1") String page,
#QueryParam("page_size") #DefaultValue(UNLIMITED) String pageSize) throws Exception
{
stuff…
}
Thanks for your help.
Using something such as Spring's MVC controller, you can easily get and set response headers as in the below example. A list of common headers can be found here Wikipedia - Common Headers
...
#RequestMapping(method = RequestMethod.GET)
public String myGetMethod(#PathVariable string owner, #PathVariable string pet, HttpServletResponse response) {
response.setContentType("text/html");
response.setHeader("Content-disposition","Content-Disposition:attachment;filename=fufu.png");
}
...
Related
I'm working with Facebook messenger app (chatbot) and I want to see what GET request I'm receiving from it. I'm using Spring Framework to start http server and ngrok to make it visible for facebook.
Facebook sending webhooks to me and i receive them, but i don't understand how to extract data from this request. Here what i get when I try HttpRequest to receive GET request. ngrok screenshot (error 500).
When I tried without HttpRequest, i had response 200 (ok).
What do i need to put to parameters of my find method to see GET request data?
My code:
#RestController
public class botAnswer {
#RequestMapping(method= RequestMethod.GET)
public String find(HttpRequest request) {
System.out.println(request.getURI());
String aaa = "222";
return aaa;
}
}
I guess HttpRequest will not help you here. For simplicity, just change HttpRequest to HttpServletRequest. You can access all query string parameters from it using request.getParameter("..."). Something like the following should work:
#RequestMapping(value = "/", method = RequestMethod.GET)
public String handleMyGetRequest(HttpServletRequest request) {
// Reading the value of one specific parameter ...
String value = request.getParameter("myParam");
// or all parameters
Map<String, String[]> params = request.getParameterMap();
...
}
This blog post shows how to use the #RequestParam annotation as an alternative to reading the parameters from HttpServletRequest directly.
I am trying this using spring3 hibernate3 and tiles2.
#RequestMapping(value = "/capturedetails", method = RequestMethod.GET)
public String getcapturedetails(Model model, HttpSession session,
HttpServletRequest request) {
Customer customer=new Customer();
model.addAttribute("customer", customer);
return "capturedetails";
}
#RequestMapping(value = "/capturedetails", method = RequestMethod.POST)
public String addcustomer(
#ModelAttribute("Customer") Customer customer, Model model,
HttpSession session, HttpServletRequest request) {
custBarcodeService.saveCustomer(customer);
model.addAttribute("customer ", new Customer());
return "capturedetails";
}
Upon submitting request control it always picking up GET method and not POST...
How can I fix this?
I had faced similar issue in the past. In my case I was trying to make a POST request from postman with a json body to an endpoint which was receiving the data in x-www-form-urlencoded format on the controller side.
Note that if you are using #ModelAttribute in your post controller method, it receives the data in x-www-form-urlencoded format. If this case, then possible solutions would be
make the post request method receive json data by using #RequestBody:
#RequestMapping(value = "/capturedetails", method = RequestMethod.POST)
public String addcustomer(#RequestBody Customer customer, Model model,
HttpSession session, HttpServletRequest request) {
custBarcodeService.saveCustomer(customer);
model.addAttribute("customer ", new Customer());
return "capturedetails";
}
Send data in x-www-form-urlencode format from rest client
I think you might have multiple form-element open...Check your tiles layout files and remove the multiple form elements and then try to post.
Because the same solution solved my problem as well.
I have a very weird problem in my Spring MVC application. I am writing a login form and POSTing the data via AJAX into a Spring MVC controller that looks like this:
#Controller
public class LoginResourceController {
private static final Logger log = Logger.getLogger (LoginResourceController.class.getName());
#RequestMapping (value="/login", method = RequestMethod.POST)
public String checkAccount (HttpServletRequest httpRequest, HttpServletResponse httpResponse,
#RequestHeader (value = "User-Agent") String retrievedUserAgent,
#RequestParam("username") String username,
#RequestParam("password") String password,
#RequestParam("rememberMe") String rememberMe)
{
//Check username and password in DB, and then if OK,
return "redirect:/login/redirectToMain";
}
#RequestMapping (value = "/login/redirectToMainpage", method = RequestMethod.GET)
public String redirectControllerToMainPage (HttpServletRequest httpRequest, HttpServletResponse httpResponse)
{
return "mainPage";
}
Now, the problem is, I have the client (browser) upon redirect requesting a URL that contains the entire contents of mainPage.jsp in the URL. So it looks like:
https://localhost:8443/<!DOCTYPE html><html><head><meta charset=utf-8 /><title>Page that the subscriber sees after login</title>....
I am quite confounded by this error. Is this some servlet setting in WEB-INF/web.xml or mvc-dispatcher-servlet.xml that I need to change? I am using Spring 3.0.5.
BTW, my redirect works flawlessly for GET method controllers in the same Spring MVC application. (e.g., when I re-load the main page of my application, the redirect to the logged in mainPage.jsp above works flawlessly). Moreover, other GET methods on other jsps work correctly too (example, redirect to /login page via login.jsp via a GET of https://localhost:8443/.
I have checked the following and they didn't help: 1 2.
Try not to put the redirect in the return of the controller. This seems to either cause the full page to be rendered as the ajax response, or a redirect header is filled in with an url with the full contents of the page as a string in the response body.
As a first approach, try to make the request a normal HTTP request instead of ajax, and it should just work.
Alternativelly try to make the return body empty, and return an HTTP status code to the client. Either 200 OKif the account is OK or 401 Unauthorized:
#RequestMapping (value="/login", method = RequestMethod.POST)
public ResponseEntity checkAccount (HttpServletRequest httpRequest, HttpServletResponse httpResponse,
#RequestHeader (value = "User-Agent") String retrievedUserAgent,
#RequestParam("username") String username,
#RequestParam("password") String password,
#RequestParam("rememberMe") String rememberMe)
{
//Check username and password in DB
....
HttpStatus returnCode = null;
if(usernameAndPasswordOK) {
returnCode = HttpStatus.OK;
}
else {
returnCode = HttpStatus.UNAUTHORIZED;
}
return new ResponseEntity(returnCode);
}
And then on the client redirect with Javascript accordingly.
This was a little tricky for me to figure out, and being a web development noob doesn't help here. Anyway, #jhadesdev's answer above pointed me to the issue.
On my client, I do this:
$("#loginForm").submit(function(evt)
{
evt.preventDefault();
if (loginFormInputIsValid ())
{
$.ajax ({
type: "POST",
url: "/login",
data: $(this).serialize(),
success: function (response)
{
window.location = response;
}
});
}
}
which was the issue--you see, setting the window.location=response; caused the client (browser) to request the server for the funky URL above. I have to change my client call (this is where #jhadesdev's response helped) to make sure I don't do something so wrong.
Thanks for your time, #jhadesdev.
How do I enhance the Controller below to utilize Spring MVC's Flash Attributes? The use case is a copy function.
POST/REQUEST/GET implementation:
client clicks "copy" button in the UI
server sets the response "Location" header
client redirects to "path/to/page?copy"
server provides ModelAndView
client (jQuery success function) sets window.location
FooController redirect method:
#RequestMapping(value = "{fooId}", method = POST, params = { "copy" })
#Transactional
#ResponseStatus(CREATED)
public void getCopyfoo(#PathVariable String fooId,
HttpServletResponse response, RedirectAttributes redirectAttrs) {
response.setHeader("Location", uriPath);
//no worky?!:
redirectAttrs.addFlashAttribute("barKey", "barValue");
}
FooController get method:
#RequestMapping(value = "{fooId}", method = GET)
#Transactional(readOnly = true)
public ModelAndView findFooById(#PathVariable String fooId,
HttpServletRequest request){
Map<String, ?> map = RequestContextUtils.getInputFlashMap(request);
// map is empty...
return modelAndViewFromHelperMethod();
}
I'm affraid that RedirectAttributes work only with RedirectView,
so Your controller should return for example:
1. String: "redirect:/[uriPath]"
2. new RedirectView([uriPath])
If you realy need to handle server response with JS, then maybe handling HTTP status 302 would help.
I have this piece of code:
#RequestMapping(value = "/test.json", method = RequestMethod.GET)
#ResponseStatus(HttpStatus.OK)
public #ResponseBody Object[] generateFile(#RequestParam String tipo) {
Object[] variaveis = Variavel.getListVariavelByTipo(tipo);
return variaveis;
}
As far as I know it should take a request to test.json?tipo=H and return the JSON representation of Variavel[], however when I make such request I get:
HTTP Status 406 -
type Status report
message
descriptionThe resource identified by this request is only capable of generating responses with characteristics not acceptable according to the request "accept" headers ()
By using the following function I can get the expected json:
#RequestMapping(value = "/teste.json")
public void testeJson(Model model, #RequestParam String tipo) {
model.addAttribute("data", Variavel.getListVariavelByTipo("H"));
}
What I'm doing wrong?
#RequestBody/#ResponseBody annotations don't use normal view resolvers, they use their own HttpMessageConverters. In order to use these annotations, you should configure these converters in AnnotationMethodHandlerAdapter, as described in the reference (you probably need MappingJacksonHttpMessageConverter).