「Dropbox Java API で過去リビジョンのファイルを取得」ブログ用

RevParamEnableDropboxAPI.java

package com.zaneli.dropbox;

import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpGet;

import com.dropbox.client2.DropboxAPI;
import com.dropbox.client2.RESTUtility;
import com.dropbox.client2.exception.DropboxException;
import com.dropbox.client2.session.AbstractSession;

public class RevParamEnableDropboxAPI<T extends AbstractSession> extends DropboxAPI<T> {

	public RevParamEnableDropboxAPI(T session) {
		super(session);
	}

	@Override
	public DropboxInputStream getFileStream(
			String path, String rev) throws DropboxException {
		assertAuthenticated();
		if (!path.startsWith("/")) {
			path = "/" + path;
		}
		String url = "/files/" + session.getAccessType() + path;
		String target = RESTUtility.buildURL(
				session.getContentServer(),
				VERSION,
				url,
				new String[] {
					"locale", session.getLocale().toString(),
					"rev", rev // この行を追加しただけ
				});
		HttpGet req = new HttpGet(target);
		session.sign(req);
		
		HttpResponse response = RESTUtility.execute(session, req);
		
		return new DropboxInputStream(req, response);
	}
}