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Java Spring - How to take in RequestParam, and remove from url?

Sometimes I will want to pass in an identifier to my website through the url, but I don't want to display this to the user. Is there a simple way to take in a request param but not display it to the user when loading the page?
This is a general idea of how my code is set up currently
#GetMapping("/somePage")
public ModelAndView get(#RequestHeader HttpHeaders headers,
#RequestParam(value = "someId", required = false) String someId) {
I know I could theoretically do this on the javascript side, but that seems to require the page to reload or mess with the history.

Generally this is bad practice - if it's passed in the URL, it'll be visible in the user's browser history. POST is probably the best practice here.
But to answer your actual question:
Put your custom value into a header and redirect?
Something along these lines (untested)
headers.set("X-Custom-Header1", someId);
headers.set("Location", "/newEndpoint");
return new ResponseEntity<>(headers, HttpStatus.FOUND);

XPATH results into empty string

url <- read_html('https://ngodarpan.gov.in/index.php/home/statewise_ngo_sof/27/35/1?')
valuation <- html_nodes(url,xpath='//*[(#id = "ngo_state_p")]')
valuation
class(valuation)
valuation1 <- html_text(valuation)
valuation1
the result of above code is empty string?is there any way out to get the exact value.
ngodarpan.gov.in/index.php/home/statewise_ngo/62/35/1 click on the name of first NGO AdityaNatyaAcademy,under that pop check the value for state for registration i.e ANDAMAN & NICOBAR ISLANDS

Your individual NGO data is coming in ajax requests in the background. Below is the javascript code that's fetching your data.
Function: function show_ngo_info(ngo_id) (in the same page...)
$.post("https://ngodarpan.gov.in/index.php/ajaxcontroller/show_ngo_info", {
id: ngo_id,
csrf_test_name:get_csrf_token()
}
It's using csrf token, which may complicate your automation a little bit. But, you should still be able to retrieve data with this. Let me know how it goes.
The data is being fetched on NGO link click in the background, and hence you are getting empty string when trying to read the data before that.

Spring Facebook Template map fetchObject to PagedList

I'm using the following approach to return a Facebook user's music preferences:
//FIXME: Fetch results in a single operation
val likes = facebook.likeOperations().music
val artists = ArrayList<Artist>()
for (musicLiked in likes)
{
val musicProfile = facebook.fetchObject(musicLiked.id, Page::class.java, "id", "name", "genre");
artists.add(Artist(name = musicProfile.name, genre = musicProfile.genre))
}
The above approach won't scale, since we have an additional network operation for each artist the user likes.
I tried:
I tried using facebook.likeOperations.music however this doesn't fetch genre.
Question:
I would like to use facebook.fetchObject with a query that returns a PagedList. How to do this?
(No need to post example code in Kotlin if you prefer or are more familiar with Java - I'll be happy with information in any language).

Facebook api uses "fields" parameter in requests to return custom fields for objects. This parameter can be also used for liked music rest request.
me/music?fields=id,genre,name
above link will return all liked music with id, genre and name of the artist/group. Unfortunately FacebookTemplate does not have method which will apply for your needs. The method Facebook.likeOperations() returns instance of the LikeTemplate class which has constant PAGE_FIELDS with value
private static final String PAGE_FIELDS = "id,name,category,description,location,website,picture,phone,affiliation,company_overview,likes,checkins";
In above constant you do not have genre field. So you have two ways:
You can simply use facebook rest api with some rest library
You can override FacebookTemplate and return your own implementation of LikeTemplate as result of the likeOperations() method. You implementation of the LikeTemplate class should have different value in mentioned constant (added genre field at the end of the string)
Maybe some one will be more helpful but in my knowledge you do not have other options.

Thanks to advice given in #burovmarley's answer, I inspected the source and came up with:
val music = facebook.fetchConnections(userPage.id, "music", Page::class.java,
PagingParameters(25, 0, null, null).toMap(), "id,name,,genre")
for (musicLiked in music)
{
println("likes: ${musicLiked.name}, genre: ${musicLiked.genre}")
}
This allows using Spring Social Facebook as an unmodified dependency, and without issuing a pull request, which seem to be fairly slow in processing through the queue at the present time.

How to load a Google maps static map using Picasso?

In my Android app I use Picasso to load images. This normally works perfectly well.
Today I tried loading a static image from the google maps api, but this doesn't seem to work. When I open the example link as provided on their info page, I get to see the static map image perfectly well. When I load it in my Android app using the line below, I get nothing at all.
Picasso.with(getContext()).load("http://maps.googleapis.com/maps/api/staticmap?center=Brooklyn+Bridge,New+York,NY&zoom=13&size=370x250&maptype=roadmap%20&markers=color:blue|label:S|40.702147,-74.015794&markers=color:green|label:G|40.711614,-74.012318%20&markers=color:red|color:red|label:C|40.718217,-73.998284&sensor=false").into(mapView);
I also tried to download the image and uploading it to my personal webspace, from which it loads perfectly well, but somehow, it doesn't seem to load directly from the direct google API url.
Does anybody know why this is so, and how I can solve it?

The only programmatic point-of-failure that comes to mind is in parsing the URI. Looking at the current Picasso code (https://github.com/square/picasso/blob/master/picasso/src/main/java/com/squareup/picasso/Picasso.java) I see the following:
public RequestCreator load(String path) {
if (path == null) {
return new RequestCreator(this, null, 0);
}
if (path.trim().length() == 0) {
throw new IllegalArgumentException("Path must not be empty.");
}
return load(Uri.parse(path));
}
So I'd first debug
Uri.parse("http://maps.googleapis.com/maps/api/staticmap?center=Brooklyn+Bridge,New+York,NY&zoom=13&size=370x250&maptype=roadmap%20&markers=color:blue|label:S|40.702147,-74.015794&markers=color:green|label:G|40.711614,-74.012318%20&markers=color:red|color:red|label:C|40.718217,-73.998284&sensor=false")
and see what that Object looks like. Does it drop or confuse any of your parameters?
If that doesn't lead you anwhere, try downloading the file manually using a HttpClient [or similar]. Then at least you can fully debug the request/response.
Also, I know Google maps has some limits -- are you sure you haven't reached them?

replace http with https
replace | with %7C
add api key

The .loadMap() function has many declared variables. This is the heart of the whole process.
So what is required for the static maps API to give us an image is that we make an http request with a given url, for which an image response (URL) is received. Let us run through the meaning and utility of these variables. Yes, all of them have a completely different meaning!
The mapUrlInitial variable is always the same while making an API call. It has a query of center ( ?center ) which specifies that we want the location to be centered in the map.
The mapUrlProperties variable contains a string where you control the actual zooming of the image response you will get, the size ofthe image and the color of the marker which will point out our place.
The mapUrlMapType variable is a string where you can actually determine the marker size you want and the type of the map. We are using a roadtype map in the app.
Finally latLong is a string which concatenates the latitude and the longitude of the place we want to pinpoint!
We then concatenate all of these strings to form a feasible Url. The Url is then loaded as we have seen above, in the Picasso code. One thing we can notice is that an event object is always required for all of this to happen, because we are able to fetch the position details using the event object! Final Code:-
fun loadMap(event: Event): String{
//location handling
val mapUrlInitial = “https://maps.googleapis.com/maps/api/staticmap?center=”
val mapUrlProperties = “&zoom=12&size=1200×390&markers=color:red%7C”
val mapUrlMapType = “&markers=size:mid&maptype=roadmap”
val latLong: String = “” +event.latitude + “,” + event.longitude
return mapUrlInitial + latLong + mapUrlProperties + latLong + mapUrlMapType
}
//load image
Picasso.get()
.load(loadMap(event))
.placeholder(R.drawable.ic_map_black_24dp)
.into(rootView.image_map)

what is the best way to display website visitors a one time welcome message?

I've got a website, and I want to add a welcoming message which hovers on a certain part of the page which only loads for the visitor for the first time they login, and won't again(presumably cookies used). And says something like "adjust your settings here.."
I don't want it to be an external popup but something that loads on the page in a certain area, defined by me (PX-pixle reference)
What would be the best coding language to do it in, oes anyone have any examples of this, or any site based generators to make it on?
thanks

Create one more field in database with lastlogin.
When user is created then make lastlogin field with special.
When user signs the next time from Login Page, update the field the lastlogin value to regular
//query to get value of lastlogin
//add css to elements you want to hover
<element class="<?php if($last-login == 'sepcial') { echo 'sepcialcss'; } else {echo 'regularcss'; }">
Done in PHP

As you added the tag, php would do this, actually any language will do.
Generally you have two ways to do this.
Do it on your server.
Do it on client's computer.
for the first way, you check the cookies and generate the page you want.
for the second way, you need to arrange the page the visitors see with java script.
way 1 recommended, coz it loads less bits. LOL
Update:
your server supports php right? the page, say it index.php, has a special area which is different when the visitors login the first time, right?
<?php
if (firstLogin()){
genSpecial();
}
else{
genRegular();
}
?>
in the funcition firstLogin(), you shall read the cookies and determine.
in the other two functions, just gen two different part, i.e. some html source code.
to your question, if you need to load some image, do it in genSpecial(). and if you choose the first way, js is not used to gen the special area, it's used only if in the special area, there needs some js.

It is possible through javascript. Once the user is shown the settings, store the result in a cookie valid for as long as you want. The next time the user logs in, verify if the cookie is set and then proceed.
Sample code to create cookies:
function setCookie(c_name,value,exdays)
{
var exdate=new Date();
exdate.setDate(exdate.getDate() + exdays);
var c_value=escape(value) + ((exdays==null) ? "" : "; expires="+exdate.toUTCString());
document.cookie=c_name + "=" + c_value;
}
Refer this for more details on how to create and use cookies