Java

Search for Files in Google Drive

See more Google Drive Examples

This example follows the same methodology for listing all files in Google Drive in pages, but applies a search filter. It shows how to apply a query parameter for filtering the file results. See the Google Drive Files list for more optional HTTP parameters. Chilkat2 Java

import com.chilkatsoft.chilkat2.AuthGoogle;
import com.chilkatsoft.chilkat2.JsonObject;
import com.chilkatsoft.chilkat2.Rest;

public class ChilkatExample {

    public static void main(String[] args) {
        boolean success = false;

        success = true;

        // It requires the Chilkat API to have been previously unlocked.
        // See Global Unlock Sample for sample code.

        // This example uses a previously obtained access token having permission for the
        // Google Drive scope.

        AuthGoogle gAuth = new AuthGoogle();
        gAuth.setAccessToken("GOOGLE-DRIVE-ACCESS-TOKEN");

        Rest rest = new Rest();

        // Connect using TLS.
        boolean bAutoReconnect = true;
        rest.connect("www.googleapis.com", 443, true, bAutoReconnect);

        // Provide the authentication credentials (i.e. the access token)
        rest.setAuthGoogle(gAuth);

        // Get 5 results per page for testing.  (The default page size is 100, with a max of 1000.
        rest.addQueryParam("pageSize", "5");

        // Our search filter is to list all files containing ".jpg" (i.e. all JPG image files)
        rest.addQueryParam("q", "name contains '.jpg'");

        JsonObject json = new JsonObject();
        int i = 0;
        int numFiles = 0;

        // Send the request for the 1st page.
        String jsonResponse = rest.fullRequestNoBody("GET", "/drive/v3/files");

        int pageNumber = 1;
        String pageToken = "";
        boolean bContinueLoop = rest.getLastMethodSuccess() && (rest.getResponseStatusCode() == 200);

        while (bContinueLoop) {
            System.out.println("---- Page " + pageNumber + " ----");

            // Iterate over each file in the response and show the name, id, and mimeType.
            json.load(jsonResponse);

            numFiles = json.sizeOfArray("files");
            i = 0;
            while (i < numFiles) {
                json.setI(i);
                System.out.println("name: " + json.stringOf("files[i].name"));
                System.out.println("id: " + json.stringOf("files[i].id"));
                System.out.println("mimeType: " + json.stringOf("files[i].mimeType"));
                System.out.println("-");
                i = i + 1;
            }

            // Get the next page of files.
            // If the "nextPageToken" is present in the JSON response, then use it in the "pageToken" parameter
            // for the next request.   If no "nextPageToken" was present, then this was the last page of files.
            pageToken = json.stringOf("nextPageToken");
            bContinueLoop = false;
            boolean bHasMorePages = json.getLastMethodSuccess();
            if (bHasMorePages) {
                rest.clearAllQueryParams();
                rest.addQueryParam("pageSize", "5");
                rest.addQueryParam("pageToken", pageToken);
                rest.addQueryParam("q", "name contains '.jpg'");

                jsonResponse = rest.fullRequestNoBody("GET", "/drive/v3/files");
                bContinueLoop = rest.getLastMethodSuccess() && (rest.getResponseStatusCode() == 200);
                pageNumber = pageNumber + 1;
            }
        }

        if (!rest.getLastMethodSuccess()) {
            System.out.println(rest.getLastErrorText());
            return;
        }

        // A successful response will have a status code equal to 200.
        if (rest.getResponseStatusCode() != 200) {
            System.out.println("response status code = " + rest.getResponseStatusCode());
            System.out.println("response status text = " + rest.getResponseStatusText());
            System.out.println("response header: " + rest.getResponseHeader());
            System.out.println("response JSON: " + jsonResponse);
            return;
        }
    }
}