I am trying to update angular2 to latest version. Several of the functions are missing
I would like to know what is the alternate for the following function
final RouteParams _params;
String get routeName => _router.currentInstruction.component.routeName;
How to get routeName from new AngularDart
Not possible to access current component route anymore.
I don't know what you want to do exactly and how you define your routeName, but you probably need to use additionalData of RoutePath or RouteDefinition
class AdditionalRouteData {
final String routeName;
const AdditionalRouteData({this.routeName});
}
final routePath = RoutePath(
path: '/',
additionalData: AdditionalRouteData(routeName: 'Home'),
);
// then get it that way
(router.current.routePath.additionalData as AdditionalRouteData).routeName;
However, if your routeName is dynamic, you must find a new way to access it (without the router, using a service via dependency injection)
Related
I'm trying to trasform http GET method call from legacy api server built with MVC1 pattern to new restful api server without any change of front-end source code using netflix zuul and eureka.
I added zuul pre filter transforming legacy url to restful convention url working after PreDecorationFilter and it works fine.
But now I'm facing problem converting the GET method to proper method like POST, PUT, DELETE by distinguising url so that the requests are properly mapped in spring controller via #GetMapping/#PostMapping/#PutMapping/#DeleteMapping.
I looked into SimpleRoutingFilter that handles HttpClient but
Because of environmental constraint, I have to use eureka service id to route to the new api server and that means I should use RibbonRoutingFilter which is quite complicated to find out a right place to this operation in.
So, is this possible to change http method or make new http request before RibbonRoutingFilter?
If possible can you please suggest where is the right place to do that or some reference?
Many thanks!
======================================================================
Milenko Jevremovic,
Would you please tell me more detail about using Feign?
I defiend #FeignClient like below
#PostMapping(value = "{url"}, consumes = "application/json")
ResponseEntity<?> postMethod(#PathVariable("url") String url);
and to get query parameters to request body for POST In zuul pre filter,
after transform logic from GET request url to POST new restful url ...
byte[] bytes = objectMapper.writeValueAsBytes(ctx.get("requestQueryParams"));
ctx.setRequests(new HttpServletRequestWrapper(request) {
#Override ..getMethod
#Override ..getContentLength
#Override ..getConentLengthLong
#Override
public ServletInputStream getInputStream() {
return new ServletInputStreamWrapper(bytes);
}
}
ResponseEntity<?> response feignClient.post(transformedNewApiUri);
and set RequestContext code that you suggested ....
and controller of new api server is like,
#PostMapping
ResponseEntity<model> post(#RequestBody req..)
It comes to controller fine but when I see the http request in post method of controller,
There is no request body for parameters.
(HttpServleterRequest getInputStream shows empty)
The request data set in zuul pre filter by HttpServletRequestWrapper is
not used in Feign maybe...?
Would you please get me more idea setting request body when changing GET query
to POST constructor for using Feign?
It is not possible to change method of HttpServletRequest, but it's possible to replace request in RequestContext. HttpServletRequestWrapper appears to be very helpful:
static class PostHttpServletRequest extends HttpServletRequestWrapper {
public PostHttpServletRequest(HttpServletRequest request) {
super(request);
}
#Override
public String getMethod() {
return "POST";
}
}
So method run can be rewritten as following:
#Override
public Object run() {
RequestContext ctx = RequestContext.getCurrentContext();
HttpServletRequest request = ctx.getRequest();
HttpServletRequest requestWrapper = new PostHttpServletRequest(request);
ctx.setRequest(requestWrapper);
return null;
}
After doing some research did not find any built in solution.
But what comes in my mind you can use Feign client in your Pre filter, get the response, set the response and return it immediately to client from your Pre filter.
You can set Feign client url or your service id, like it is explained in the docs, it uses ribbon as well .
Change response in your run method like:
...
RequestContext ctx = RequestContext.getCurrentContext();
ctx.setResponseStatusCode(your_code);
ctx.setResponseBody(new_body);
ctx.setSendZuulResponse(false);
return null
I'm trying to get the URL parameters into my component to search using an externsre service. I read I can use angular2 routes and get params using RouteParams but I don't think that's what I need because the first page of my angular application is a Razor view.
I'll try to explain better.
My URL looks like:
http://dev.local/listing/?city=melbourne
I'm loading my root component in a razor view with something like:
<house-list city = "#Request.Params["city"]"></house-list>
then on my root component I have:
export class AppComponent implements OnInit {
constructor(private _cityService: CityService) { }
response: any;
#Input() city: any;
ngOnInit() {
this.getHouses();
}
getHouses() {
this.__cityService.getHousesByCity(this.city)
.subscribe(data => this.response = data);
}
}
So I was expecting that the 'city' in my component gets the string passed from the razor view but it's undefined.
What am I doing wrong? Is there a way of getting the params without using the routing? If not, what is the right way of using razor?
Angular doesn't provide special support for this. You can use How can I get query string values in JavaScript?
From what I have seen Location is planned to be reworked to provide support for get query params even without using the router.
Im creating OData controller and want it to support function with 2 params.
Here is my current code.
OData cofig:
ODataModelBuilder builder = new ODataConventionModelBuilder();
builder.Namespace = "hop";
builder.EntitySet<ScheduleDTO>("Schedules");
var function = builder.Function("GetByEntityAndJurisdiction");
function.Parameter<Guid>("EntityId");
function.Parameter<Guid>("JurisdictionId");
function.ReturnsCollectionFromEntitySet<ScheduleDTO>("Schedules");
Controller:
[ODataRoutePrefix("Schedules")]
public class ScheduleODataController : BaseODataManager, IScheduleODataManager
{
[ODataRoute]
public async Task<IHttpActionResult> GetAsync(ODataQueryOptions<ScheduleDTO> options)
{
.....
return Ok(schedules.Select(x => Mapper.Map<ScheduleDTO>(x)));
}
[HttpGet]
[ODataRoute("GetByEntityAndJurisdiction(EntityId={entityId}, JurisdictionId={jurisdictionId})")]
public async Task<IHttpActionResult> GetByEntityAndJurisdiction(ODataQueryOptions<ScheduleDTO> options, [FromODataUri] Guid entityId, [FromODataUri] Guid jurisdictionId)
{
.....
return Ok(schedules.Select(x => Mapper.Map<ScheduleDTO>(x)));
}
}
Starting my app, I have following error:
A first chance exception of type 'System.InvalidOperationException' occurred in System.Web.OData.dll
Additional information: The path template 'Schedules/GetByEntityAndJurisdiction(EntityId={entityId}, JurisdictionId={jurisdictionId})' on the action 'GetByEntityAndJurisdiction' in controller 'ScheduleOData' is not a valid OData path template. The request URI is not valid. Since the segment 'Schedules' refers to a collection, this must be the last segment in the request URI or it must be followed by an function or action that can be bound to it otherwise all intermediate segments must refer to a single resource.
How to resolve this problem? Thanks in advance.
#Vladimir
In your controller, you add a prefix attribute [ODataRoutePrefix("Schedules")] on the controller. Doing so will add the prefix string at head of all the [ODataRoute] in the same controller. So, for below action
public async Task<IHttpActionResult> GetByEntityAndJurisdiction(ODataQueryOptions<ScheduleDTO> options, [FromODataUri] Guid entityId, [FromODataUri] Guid jurisdictionId)
{...}
the full Uri template should be:
Schedules/GetByEntityAndJurisdiction(EntityId={entityId}, JurisdictionId={jurisdictionId})
Obviously, This Uri is invalid because:
The collection of Schedules doesn't have a bound function named GetByEntityAndJurisdiction
Even though GetByEntityAndJurisdiction is a bound function, you should call the bound function through it's namespace-qualified function name.
Maybe, It's confused that you have build the function as the following codes:
var function = builder.Function("GetByEntityAndJurisdiction");
However, it means to build an unbound function. An unbound function is called through function import by issuing a GET request to a URL identifying the function import and passing parameter values using inline parameter syntax. The canonical URL for a function import is the service root, followed by the name of the function import.
So, you can change your codes as follows to make it work:
If you want to keep the model schema unchanged, that is to build GetByEntityAndJurisdiction as unbound function, please remove the ODataRoutePrefix("Schedules")] from your controller. Or create a new controller (any controller), move the action into the new controller but don't add the Prefix attribute.
If you want to change the schema and keep the controller unchanged, that is to GetByEntityAndJurisdiction as bound function.
Please do as follows :
var entity = builder.EntitySet<ScheduleDTO>("Schedules").EntityType;
var function = entity.Collection.Function("GetByEntityAndJurisdiction");
...
For more information about function, you can refer to OData.Org or Function Sample page, or Function blog.
My question should have a simple answer, but after hours of experimentation and googling, I have nothing so now I'm here.
I am working with .net MVC 5 odata 2.0. I am trying to create a new odata endpoint that works on a get. I've successfully created a few endpoints that work with POST, but I can't seem to get one that works as a GET.
relevant code
WebApiConfig.cs
ODataConventionModelBuilder builder = new ODataConventionModelBuilder();
builder.EntitySet<Review>("Reviews");
builder.EntitySet<Strategy>("Strategies");
ActionConfiguration ReviewsInStrategy = builder.Entity<Strategy>().Action("ReviewsInStrategy");
ReviewsInStrategy.ReturnsCollectionFromEntitySet<Review>("Reviews");
config.Routes.MapODataServiceRoute("odata", "odata", builder.GetEdmModel());
StrategiesController.cs
[EnableQuery]
public IQueryable<Review> ReviewsInStrategy([FromODataUri] Guid key){
Strategy strategy = db.Strategies.Find(key);
return strategy.Reviews
}
Now I go to fiddler and try a GET to
[myurl]/odata/Strategies(guid'[myguid]')/ReviewsInStrategy
I get a 404 result. But when I change fiddler to a POST (no other change - I don't add accept headers or content types or anything) it works just fine.
How do I make this work with GET?
You need to add a Get-function to your controller:
[EnableQuery]
public SingleResult<Strategies> Get([FromODataUri] Guid key)
{
IQueryable<Strategies> result = db.Strategies.Where(p => p.Id == key);
return SingleResult.Create(result);
}
That way you can use a GET request on the Strategies-resource. If you still want to use a custom action you must add the parameter to your config:
ActionConfiguration ReviewsInStrategy = builder.Entity<Strategy>().Action("ReviewsInStrategy").Returns<Review>().Parameter<Guid>("Key");
[HttpGet]
[ODataRoute("ReviewsInStrategy(Key={key})")]
public IHttpActionResult<Review> ReviewsInStrategy([FromODataUri] Guid key){
Strategy strategy = db.Strategies.Find(key);
return Ok(strategy.Reviews);
}
Not sure if all this works with the complex type Guid. Maybe you need to change it to string and parse it inside the function. Here is a good msdn article about this.
I'd like to create URLs based on the URL used by the client for the active request. Is there anything smarter than taking the current HttpServletRequest object and it's getParameter...() methods to rebuilt the complete URL including (and only) it's GET parameters.
Clarification: If possible I want to resign from using a HttpServletRequest object.
Well there are two methods to access this data easier, but the interface doesn't offer the possibility to get the whole URL with one call. You have to build it manually:
public static String makeUrl(HttpServletRequest request)
{
return request.getRequestURL().toString() + "?" + request.getQueryString();
}
I don't know about a way to do this with any Spring MVC facilities.
If you want to access the current Request without passing it everywhere you will have to add a listener in the web.xml:
<listener>
<listener-class>org.springframework.web.context.request.RequestContextListener</listener-class>
</listener>
And then use this to get the request bound to the current Thread:
((ServletRequestAttributes) RequestContextHolder.currentRequestAttributes()).getRequest()
Instead of using RequestContextHolder directly, you can also use ServletUriComponentsBuilder and its static methods:
ServletUriComponentsBuilder.fromCurrentContextPath()
ServletUriComponentsBuilder.fromCurrentServletMapping()
ServletUriComponentsBuilder.fromCurrentRequestUri()
ServletUriComponentsBuilder.fromCurrentRequest()
They use RequestContextHolder under the hood, but provide additional flexibility to build new URLs using the capabilities of UriComponentsBuilder.
Example:
ServletUriComponentsBuilder builder = ServletUriComponentsBuilder.fromCurrentRequestUri();
builder.scheme("https");
builder.replaceQueryParam("someBoolean", false);
URI newUri = builder.build().toUri();
Java's URI Class can help you out of this:
public static String getCurrentUrl(HttpServletRequest request){
URL url = new URL(request.getRequestURL().toString());
String host = url.getHost();
String userInfo = url.getUserInfo();
String scheme = url.getProtocol();
String port = url.getPort();
String path = request.getAttribute("javax.servlet.forward.request_uri");
String query = request.getAttribute("javax.servlet.forward.query_string");
URI uri = new URI(scheme,userInfo,host,port,path,query,null)
return uri.toString();
}
in jsp file:
request.getAttribute("javax.servlet.forward.request_uri")
You can also add a UriComponentsBuilder to the method signature of your controller method. Spring will inject an instance of the builder created from the current request.
#GetMapping
public ResponseEntity<MyResponse> doSomething(UriComponentsBuilder uriComponentsBuilder) {
URI someNewUriBasedOnCurrentRequest = uriComponentsBuilder
.replacePath(null)
.replaceQuery(null)
.pathSegment("some", "new", "path")
.build().toUri();
//...
}
Using the builder you can directly start creating URIs based on the current request e.g. modify path segments.
See also UriComponentsBuilderMethodArgumentResolver
If you need the URL till hostname and not the path use Apache's Common Lib StringUtil, and from URL extract the substring till third indexOf /.
public static String getURL(HttpServletRequest request){
String fullURL = request.getRequestURL().toString();
return fullURL.substring(0,StringUtils.ordinalIndexOf(fullURL, "/", 3));
}
Example: If fullURL is https://example.com/path/after/url/ then
Output will be https://example.com
System.out.println(((HttpServletRequest)request).getRequestURI());
I used it. hope it's useful.