So, i am developing a web service where when i call api/update action on form submit, two of my inputs from my jsp, "data" and "id" are supposed to pass, on which i want to perform operations in the POST method block.
here is the form calling the method:
<form id="myForm" action="api/update" method="post">
id: <input type="text" id="id" name="id">
<br/>
<textarea id="data" name="data" rows="30" cols="100" placeholder="Empty File"></textarea>
<br/>
<button id="submit" type="submit">Submit</button>
</form>
Here is the REST code:
#Path("update")
public class UpdateResource {
#Context
private UriInfo context;
public UpdateResource() {
}
#Context
private HttpServletRequest request;
#POST
public void putHtml() {
String data = request.getParameter("data");
String id = request.getParameter("id");
System.out.println(id); //<---- line1
System.out.println(data); //<---- line2
//further operations
}
}
The problem is that line1 and line2 gives null as output, means somehow data is not being passed. Am i doing something wrong?
Here is the Header file captured from network tab of chrome browser:
Instead of trying to get the parameters from the HttpServletRequest, use #FormParam
#POST
public void putHtml(#FormParam("id") String id,
#FormParam("data") String data) {
}
The reason is that the entity body is already being read, resulting in the parameters being empty in the HttpServletRequest.
Related
I am beginner for Java and REST API. I have a problem passing form data from HTML to rest PUT method. When I google about this, most solutions available are for POST method, that recommended to use FormParam. In my case, it shows below error:
The method received in the request-line is known by the origin server but not supported by the target resource.
Even I use PathParam, same error is returned:
The method received in the request-line is known by the origin server but not supported by the target resource.
And some solution for Spring Boot. But I did not use that.
PUT method:
#PUT
#Path("/update")
#Produces(MediaType.TEXT_HTML)
public String updCard(#PathParam("cardNo") String cardNo,
#PathParam("reportId") int reportId
) throws SQLException {
Card c = new Card(cardNo, reportId);
System.out.println(cardNo + reportId);
return "";
}
Form:
<form method="PUT" action="rest/card/update">
<label for = "cardNo">Card No: </label> <input type="text" name = "cardNo" id = "cardNo"><br/>
<label for = "reportId">Report Id:</label> <input type="text" name = "reportId" id = "reportId"> <br/>
<button type="submit">Update</button>
So, how do I get the form data in PUT method in Jersey?
As mentioned by many in Using PUT method in HTML form, PUT is not currently supported by the HTML standard. What most frameworks will do is offer a workaround. Jersey has such a workaround with its HttpMethodOverrideFilter. What you must do is use a POST method and add a _method=put query parameter and the filter will switch the POST to a PUT.
You first need to register the filter. If you are using a ResourceConfig just do
#ApplicationPath("api")
public class JerseyConfig extends ResourceConfig {
public JerseyConfig() {
...
register(HttpMethodOverrideFilter.class);
}
}
If you are using a web.xml, then do
<init-param>
<param-name>jersey.config.server.provider.classnames</param-name>
<param-value>org.glassfish.jersey.server.filter.HttpMethodOverrideFilter</param-value>
</init-param>
Then in your HTML, you will just add the _method=put query param to the URL. Below is an example I used to test
<form method="post" action="/api/form?_method=put">
<label>
Name:
<input type="text" name="name"/>
</label>
<label>
Age:
<input type="number" name="age"/>
</label>
<br/>
<input type="submit" value="Submit"/>
</form>
And in your resource method you will use #PUT and #FormParams for the paramters
#PUT
#Consumes(MediaType.APPLICATION_FORM_URLENCODED)
public Response form(#FormParam("name") String name,
#FormParam("age") String age,
#Context UriInfo uriInfo) {
URI redirectUri = UriBuilder
.fromUri(getBaseUriWithoutApiRoot(uriInfo))
.path("redirect.html")
.queryParam("name", name)
.queryParam("age", age)
.build();
return Response.temporaryRedirect(redirectUri).build();
}
private static URI getBaseUriWithoutApiRoot(UriInfo uriInfo) {
String baseUri = uriInfo.getBaseUri().toASCIIString();
baseUri = baseUri.endsWith("/")
? baseUri.substring(0, baseUri.length() - 1)
: baseUri;
return URI.create(baseUri.substring(0, baseUri.lastIndexOf("/")));
}
It should work from what I tested
I have a problem,my web app have a passcode form, user will give a Passcode string and app will riderict user to questions page for a spesific event. my controller will find this even by this passcode. i tried with this way but my passcode field is always null.
<form method="get" th:action="#{/findEvent(passcode=${passcode})}">
Passcode:<br>
<input type="text" th:name="${passcode}"><br>
<div>
<button type="submit">Find</button>
</div>
</form>
#GetMapping(value = "/findEvent")
public String resetPassword(#RequestParam(value="passcode",required=false) String passcode) {
if(passcode==null)
return "passcode";
Event event=eventService.findByPassCode(passcode);
List<Question> questions=questionService.findQuestionsByPasscode(passcode);
return "questions";
}
#RequestMapping(value = "/findEvent", method = RequestMethod.POST)
public String findEvent(#RequestParam("passcode") String passcode) {
Event event=eventService.findByPassCode(passcode);
List<Question> questions=questionService.findQuestionsByPasscode(passcode);
return "questions";
}
Same problem with mine
Request parameter with thymeleaf
How can i achieve this ?? can you help me
Use name="passcode" instead
<input type="text" name="passcode" value="1234" />
Since its the same as the object name, just use
#RequestParam String passcode
I have some input fields in my jsp page,l want to know is it possible for values passed in those fields to be passed as URL.
I tried using #RequestParam and #PathVariable on same variable to try to retrive it and put it as URI but it didnt work
This is my jsp page form:
<body>
<form action="welcome/" method="post">
<input type="text" name="name" value="">
<input type="submit" value="go">
</form>
</body>
And this is my Controller handler method:
#PostMapping(value = "/welcome/{name}")
public String welcomeAgain(#PathVariable #RequestParam("name")String name){
return "welcome";
}
Just use #PathVariable("name") annotation. Exclude the #RequestParam annotation from your function.
I hope it helps.
To get the value passed in URL you can use #PathVariable normally with GET request.
http://localhost:8080/user/101
#RequestParam normally used with POST request for accessing the query parameter values
http://localhost:8080/user/101?param1=10¶m2=20
#PostMapping(value = "/welcome/{name}")
public String welcomeAgain(#PathVariable("name") String name){
return "welcome " + name;
}
Consider I have the following form, which i send two parameters _id and poID to the controller:
<form style='float:left; padding:5px; height:0px' th:object="${plant}" th:method="post" th:action="#{/dashboard/DeliverPlant/{_id}(_id=${plant._id})/{po_id}(po_id=${plant.poID})}">
<button class="btn btn-default btn-xs" type="submit">Verify Plant Delivery</button>
</form>
And in the controller i have the following form:
#RequestMapping(method=POST, path="DeliverPlant/{_id}/{po_id}")
public String DeliverPlant(Model model,#PathVariable("_id") String id,#PathVariable("po_id") String po_id) throws Exception {
Long Id= Long.parseLong(id);
System.out.println("po_id is..................."+po_id+ "_id is: "+id);
return "dashboard/orders/ShowPOs";
}
When i send my request, there is no internal error but it complains that
There was an unexpected error (type=Method Not Allowed, status=405).
Request method 'POST' not supported
It seems that it cannot recognize the method.
So how can i fix it?
Update:
I also tried this
<form style='float:left; padding:5px; height:0px' th:object="${plant}" th:method="post" th:action="#{'/dashboard/DeliverPlant/'+{_id}(_id=${plant._id})+'/'+{po_id}(po_id=${plant.poID})}">
<button class="btn btn-default btn-xs" type="submit">Verify Plant Delivery</button>
</form>
Try
method="POST"
instead of
th:method="POST"
Also, in your Controller class try
#RequestMapping(method=RequestMethod.POST
where RequestMethod is org.springframework.web.bind.annotation.RequestMethod
You return controller in modelAndView.addobject "po", "plant", "??".
You take object value in return page(select page).
"_id" <- ???
...
Anyway
edit path
th:action="#{/dashboard/deliver/plant/__${??.id}__/__${plant.id}__/__${po.id}__ }"
edit controller
#RequestMapping(method = RequestMethod.POST, value ="/deliver/plant/{??.id}/{plant.id}/{po.id}")
public String DeliverPlant(#PathVariable("??.id") int id, #PathVariable("po.id") int poId, #PathVariable("plant.id") int plantId) {
return "dashboard/orders/ShowPOs"; // <-- break point.
}
You try debug.
See value.
I am super new to front end development. I have a simple webapp where you can submit a form, and I want to be able to get the form data in a REST endpoint. I am using Spring boot which contains Spring MVC.
The HTML:
<div class="modal-header modal-header-info">
<button type="button" class="close" data-dismiss="modal"
aria-hidden="true">×</button>
<h4 class="modal-title">Add Entity</h4>
</div>
<div class="modal-body">
<form role="form" method="post" action="/createEntity">
<div class="form-group">
<label for="name">Name:</label> <input type="text"
class="form-control" id="name">
</div>
<button type="submit" class="btn btn-info">Submit</button>
</form>
</div>
The Java:
#RequestMapping(value = "/createEntity", method = RequestMethod.POST)
public void createEntity(#RequestBody String payload) {
System.out.println("Hello world!");
System.out.println(payload);
}
I get this error back:
Failed to read HTTP message:
org.springframework.http.converter.HttpMessageNotReadableException:
Required request body is missing: public void main.java.info.spring.data.neo4j.controllers.CreateEntityController.createEntity(java.lang.String)
How do I get the "name" value from the form? The "hello world" attribute prints out if I take out the #RequestBody part.
Edit: my configuration per request:
#EnableTransactionManagement
#Import(RepositoryRestMvcConfiguration.class)
#EnableScheduling
#EnableAutoConfiguration
#ComponentScan(basePackages = { "main.java.info.spring.data.neo4j.services",
"main.java.info.spring.data.neo4j.controllers" })
#Configuration
#EnableNeo4jRepositories(basePackages = "main.java.info.spring.data.neo4j.repositories")
public class MyNeo4jConfiguration extends Neo4jConfiguration {
public static final String URL = System.getenv("NEO4J_URL") != null ? System.getenv("NEO4J_URL")
: "http://localhost:7474";
#Override
public Neo4jServer neo4jServer() {
return new RemoteServer(URL, "neo4j", "LOL my pass");
}
#Override
public SessionFactory getSessionFactory() {
return new SessionFactory("main.java.info.spring.data.neo4j.domain");
}
}
Problem 1: HTML form controls are missing the name attribute
HTML forms are submitted in name-value pairs. Form controls that do not have a name attribute cannot be submitted because their names are not known. The id attribute is only for referencing controls on the client-side.
<input type="text" class="form-control" id="name">
is missing the name attribute. It should be:
<input type="text" class="form-control" id="name" name="name"/>
This will submit the control as a form parameter in the HTTP request body, something like:
name: [the value you specify for the control]
Problem 2: #RequestBody as a controller method argument will give you the entire HTTP request body
public void createEntity(#RequestBody String payload)
means that you want the entire HTTP request body to be passed as a String to the controller method createEntity. If your HTML form is indeed what you have posted, you will get the following value for payload (after you have addressed problem 1):
name: [the value you specify for the control]
If this is what you want, keep the #RequestBody annotation, but I suspect that you are only interested in the value of the name request parameter. If that is the case, you need to change your method declaration to (after you have addressed problem 1):
public void createEntity(#RequestParam String name)
This will map the HTTP request parameter name to the controller method argument name.
Problem 3: Having void as the return type for a controller method will force Spring MVC to look for a view with the same name as the method name
Since you have the controller method declared as:
public void createEntity(#RequestBody String payload)
Spring MVC will look for a view named createEntity after this method exits. If you have a view with that name, well and good. Otherwise, once you have fixed problems 1 and 2, you will get a 404 - Resource not found error.