Get the public URL of a private Flickr file in Java

• The title may be Imif, but as you read on, you will understand somehow (^ ω ^;)

Do you use Flickr? 1TB is also free, so you want to upload all the images and videos here! There is also an API, so it can be used nicely from the program ... When I tried and searched for it, there are quite a few ways to get public images, but surprisingly there aren't many ways to get private images ... So, I will post it instead of a memorandum (* ・ ω ・) ﾉ

Get API key

It won't start without this (> _ <) Please obtain from the following. https://www.flickr.com/services/apps/create/apply/

Obtaining OAuth Token and OAuth Token Secret

If you want to get a private image, you need an OAuth Token and an OAuth Token Secret. It will be necessary for uploading, so it will not hurt to get it (･ ∀ ･) Please refer to the following procedure to obtain it. Getting a Request Token

Run the code

with this

• Api Key
• Shared Secret
• OAuth Token
• OAuth Token Secret

Are ready! Now it's time to get the code running.

Get Flickr4 Java

This time I will use the library. In case of gradle, add the following.

build.gradle

.....

dependencies {
	compile('com.flickr4java:flickr4java:2.17')
}

.....

Execution code generation

By generating an Auth class as shown below and setting it in RequestContext, you can access private files as well. Please read the $ {Api Key} part as appropriate for yourself.

Main.java

import com.flickr4java.flickr.Flickr;
import com.flickr4java.flickr.FlickrException;
import com.flickr4java.flickr.REST;
import com.flickr4java.flickr.RequestContext;
import com.flickr4java.flickr.auth.Auth;

public class Main {
    public static void main(String... args) throws FlickrException {
        final Flickr flickr = new Flickr(
                "${Api Key}",
                "${Shared Secret}",
                new REST()
        );

        Auth auth = new Auth();
        auth.setToken("${OAuth Token}");
        auth.setTokenSecret("${OAuth Token Secret}");
        RequestContext requestContext = RequestContext.getRequestContext();
        requestContext.setAuth(auth);

        PhotosetsInterface photosetsInterface = flickr.getPhotosetsInterface();
    }
}

Public URL of private file

You can get the public URL by formatting it referring to the following. https://www.flickr.com/services/api/misc.urls.html

By doing this, you can get all the small size (320px) images of API users regardless of whether they are public or private.

Main.java

import com.flickr4java.flickr.Flickr;
import com.flickr4java.flickr.FlickrException;
import com.flickr4java.flickr.REST;
import com.flickr4java.flickr.RequestContext;
import com.flickr4java.flickr.auth.Auth;
import com.flickr4java.flickr.photosets.Photoset;
import com.flickr4java.flickr.photosets.Photosets;
import com.flickr4java.flickr.photosets.PhotosetsInterface;

public class Main {

    private static final String IMAGE_URL = "https://farm%s.staticflickr.com/%s/%s_%s_%s.jpg ";

    public static void main(String... args) throws FlickrException {
        final Flickr flickr = new Flickr(
                "${Api Key}",
                "${Shared Secret}",
                new REST()
        );

        Auth auth = new Auth();
        auth.setToken("${OAuth Token}");
        auth.setTokenSecret("${OAuth Token Secret}");
        RequestContext requestContext = RequestContext.getRequestContext();
        requestContext.setAuth(auth);

        PhotosetsInterface photosetsInterface = flickr.getPhotosetsInterface();
        Photosets photosets = photosetsInterface.getList(null);

        photosets.getPhotosets().stream().map(Photoset::getId).flatMap(id -> {
            try {
                return photosetsInterface.getPhotos(id, 0, 0).stream();
            } catch (FlickrException e) {
                throw new RuntimeException();
            }
        }).forEach(photo -> System.out.println(
                String.format(IMAGE_URL, photo.getFarm(), photo.getServer(), photo.getId(), photo.getSecret(), "n")
                )
        );
    }
}

Miscellaneous feelings

I was able to get the public URL of a private file with a relatively simple code! If it is a personal application, I think you can use this kind of processing ♪