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Preview GitHub HTML Files without Downloading: How to Do It Right



When you download a file, Internet Explorer checks for clues that the download is malicious or potentially harmful to your PC. If Internet Explorer identifies a download as suspicious, you'll be notified so you can decide whether or not to save, run, or open the file. Not all files you're warned about are malicious, but it's important to make sure you trust the site you're downloading from, and that you really want to download the file.




How to Preview GitHub HTML Files without Downloading




R notebooks output to the imaginatively named .nb.html format. .nb.html files can be loaded into a web browser to see the output, or loaded into a code editor like RStudio to see the code. You are able to interactively select which code chunks to hide or show code chunks.


Notebooks use the same syntax as .Rmd files so it is easy to copy and paste the script from a .Rmd into a Notebook. To create a new R Notebook file, select File -> New File -> R Notebook. Create a notebook from your newly created .Rmd file by copying and pasting the script. If you choose to copy and paste the script, make sure that under your YAML header, output: html_notebook instead of output: html_document.


: b/19236190 */ display: none; } .kd-tabbed-horz > article > pre /* Remove extra spacing */ margin: 0; devsite-selector > section[active] /* Remove code section padding */ padding: 0; .filepath color: #fff; margin: 6px; max-width: calc(100% - 160px); /* Give at least 160px for the "View on GitHub" button. */ text-overflow: ellipsis; text-shadow: rgba(0,0,0,0.1) 1px 1px; overflow: hidden; .view-on-github text-shadow: rgba(12,12,12,0.1) 1px 1px; .github-docwidget-include border-radius: 0 !important; margin: 0 -1px; drive/snippets/drive_v3/src/main/java/DownloadFile.java View on GitHub import com.google.api.client.googleapis.json.GoogleJsonResponseException;import com.google.api.client.http.HttpRequestInitializer;import com.google.api.client.http.javanet.NetHttpTransport;import com.google.api.client.json.gson.GsonFactory;import com.google.api.services.drive.Drive;import com.google.api.services.drive.DriveScopes;import com.google.auth.http.HttpCredentialsAdapter;import com.google.auth.oauth2.GoogleCredentials;import java.io.ByteArrayOutputStream;import java.io.IOException;import java.io.OutputStream;import java.util.Arrays;/* Class to demonstrate use-case of drive's download file. */public class DownloadFile /** * Download a Document file in PDF format. * * @param realFileId file ID of any workspace document format file. * @return byte array stream if successful, @code null otherwise. * @throws IOException if service account credentials file not found. */ public static ByteArrayOutputStream downloadFile(String realFileId) throws IOException /* Load pre-authorized user credentials from the environment. TODO(developer) - See for guides on implementing OAuth2 for your application.*/ GoogleCredentials credentials = GoogleCredentials.getApplicationDefault() .createScoped(Arrays.asList(DriveScopes.DRIVE_FILE)); HttpRequestInitializer requestInitializer = new HttpCredentialsAdapter( credentials); // Build a new authorized API client service. Drive service = new Drive.Builder(new NetHttpTransport(), GsonFactory.getDefaultInstance(), requestInitializer) .setApplicationName("Drive samples") .build(); try OutputStream outputStream = new ByteArrayOutputStream(); service.files().get(realFileId) .executeMediaAndDownloadTo(outputStream); return (ByteArrayOutputStream) outputStream; catch (GoogleJsonResponseException e) // TODO(developer) - handle error appropriately System.err.println("Unable to move file: " + e.getDetails()); throw e; Python /* Remove extra DevSite2 margin */ .github-docwidget-gitinclude-code devsite-code, devsite-selector>section>devsite-code, devsite-selector>section>.github-docwidget-include, devsite-selector>section>.github-docwidget-gitinclude-code>devsite-code margin: 0; /* Disables includecode margin */ .github-docwidget-gitinclude-code .prettyprint margin: 0; .ds-selector-tabs > section > p /* Remove extra : b/19236190 */ display: none; .kd-tabbed-horz > article > pre /* Remove extra spacing */ margin: 0; devsite-selector > section[active] /* Remove code section padding */ padding: 0; .filepath color: #fff; margin: 6px; max-width: calc(100% - 160px); /* Give at least 160px for the "View on GitHub" button. */ text-overflow: ellipsis; text-shadow: rgba(0,0,0,0.1) 1px 1px; overflow: hidden; .view-on-github text-shadow: rgba(12,12,12,0.1) 1px 1px; .github-docwidget-include border-radius: 0 !important; margin: 0 -1px; drive/snippets/drive-v3/file_snippet/download_file.py View on GitHub from __future__ import print_functionimport ioimport google.authfrom googleapiclient.discovery import buildfrom googleapiclient.errors import HttpErrorfrom googleapiclient.http import MediaIoBaseDownloaddef download_file(real_file_id): """Downloads a file Args: real_file_id: ID of the file to download Returns : IO object with location. Load pre-authorized user credentials from the environment. TODO(developer) - See for guides on implementing OAuth2 for the application. """ creds, _ = google.auth.default() try: # create drive api client service = build('drive', 'v3', credentials=creds) file_id = real_file_id # pylint: disable=maybe-no-member request = service.files().get_media(fileId=file_id) file = io.BytesIO() downloader = MediaIoBaseDownload(file, request) done = False while done is False: status, done = downloader.next_chunk() print(F'Download int(status.progress() * 100).') except HttpError as error: print(F'An error occurred: error') file = None return file.getvalue()if __name__ == '__main__': download_file(real_file_id='1KuPmvGq8yoYgbfW74OENMCB5H0n_2Jm9')Node.js /* Remove extra DevSite2 margin */ .github-docwidget-gitinclude-code devsite-code, devsite-selector>section>devsite-code, devsite-selector>section>.github-docwidget-include, devsite-selector>section>.github-docwidget-gitinclude-code>devsite-code margin: 0; /* Disables includecode margin */ .github-docwidget-gitinclude-code .prettyprint margin: 0; .ds-selector-tabs > section > p /* Remove extra : b/19236190 */ display: none; .kd-tabbed-horz > article > pre /* Remove extra spacing */ margin: 0; devsite-selector > section[active] /* Remove code section padding */ padding: 0; .filepath color: #fff; margin: 6px; max-width: calc(100% - 160px); /* Give at least 160px for the "View on GitHub" button. */ text-overflow: ellipsis; text-shadow: rgba(0,0,0,0.1) 1px 1px; overflow: hidden; .view-on-github text-shadow: rgba(12,12,12,0.1) 1px 1px; .github-docwidget-include border-radius: 0 !important; margin: 0 -1px; drive/snippets/drive_v3/file_snippets/download_file.js View on GitHub /** * Downloads a file * @paramstring realFileId file ID * @returnobj file status * */async function downloadFile(realFileId) // Get credentials and build service // TODO (developer) - Use appropriate auth mechanism for your app const GoogleAuth = require('google-auth-library'); const google = require('googleapis'); const auth = new GoogleAuth( scopes: ' ', ); const service = google.drive(version: 'v3', auth); fileId = realFileId; try const file = await service.files.get( fileId: fileId, alt: 'media', ); console.log(file.status); return file.status; catch (err) // TODO(developer) - Handle error throw err; PHP /* Remove extra DevSite2 margin */ .github-docwidget-gitinclude-code devsite-code, devsite-selector>section>devsite-code, devsite-selector>section>.github-docwidget-include, devsite-selector>section>.github-docwidget-gitinclude-code>devsite-code margin: 0; /* Disables includecode margin */ .github-docwidget-gitinclude-code .prettyprint margin: 0; .ds-selector-tabs > section > p /* Remove extra : b/19236190 */ display: none; .kd-tabbed-horz > article > pre /* Remove extra spacing */ margin: 0; devsite-selector > section[active] /* Remove code section padding */ padding: 0; .filepath color: #fff; margin: 6px; max-width: calc(100% - 160px); /* Give at least 160px for the "View on GitHub" button. */ text-overflow: ellipsis; text-shadow: rgba(0,0,0,0.1) 1px 1px; overflow: hidden; .view-on-github text-shadow: rgba(12,12,12,0.1) 1px 1px; .github-docwidget-include border-radius: 0 !important; margin: 0 -1px; drive/snippets/drive_v3/src/DriveDownloadFile.php View on GitHub use Google\Client;use Google\Service\Drive;function downloadFile() try $client = new Client(); $client->useApplicationDefaultCredentials(); $client->addScope(Drive::DRIVE); $driveService = new Drive($client); $realFileId = readline("Enter File Id: "); $fileId = '0BwwA4oUTeiV1UVNwOHItT0xfa2M'; $fileId = $realFileId; $response = $driveService->files->get($fileId, array( 'alt' => 'media')); $content = $response->getBody()->getContents(); return $content; catch(Exception $e) echo "Error Message: ".$e; .NET /* Remove extra DevSite2 margin */ .github-docwidget-gitinclude-code devsite-code, devsite-selector>section>devsite-code, devsite-selector>section>.github-docwidget-include, devsite-selector>section>.github-docwidget-gitinclude-code>devsite-code margin: 0; /* Disables includecode margin */ .github-docwidget-gitinclude-code .prettyprint margin: 0; .ds-selector-tabs > section > p /* Remove extra : b/19236190 */ display: none; .kd-tabbed-horz > article > pre /* Remove extra spacing */ margin: 0; devsite-selector > section[active] /* Remove code section padding */ padding: 0; .filepath color: #fff; margin: 6px; max-width: calc(100% - 160px); /* Give at least 160px for the "View on GitHub" button. */ text-overflow: ellipsis; text-shadow: rgba(0,0,0,0.1) 1px 1px; overflow: hidden; .view-on-github text-shadow: rgba(12,12,12,0.1) 1px 1px; .github-docwidget-include border-radius: 0 !important; margin: 0 -1px; drive/snippets/drive_v3/DriveV3Snippets/DownloadFile.cs View on GitHub using Google.Apis.Auth.OAuth2;using Google.Apis.Download;using Google.Apis.Drive.v3;using Google.Apis.Services;namespace DriveV3Snippets // Class to demonstrate use-case of drive's download file. public class DownloadFile /// /// Download a Document file in PDF format. /// /// file ID of any workspace document format file. /// byte array stream if successful, null otherwise. public static MemoryStream DriveDownloadFile(string fileId) try /* Load pre-authorized user credentials from the environment. TODO(developer) - See for guides on implementing OAuth2 for your application. */ GoogleCredential credential = GoogleCredential .GetApplicationDefault() .CreateScoped(DriveService.Scope.Drive); // Create Drive API service. var service = new DriveService(new BaseClientService.Initializer HttpClientInitializer = credential, ApplicationName = "Drive API Snippets" ); var request = service.Files.Get(fileId); var stream = new MemoryStream(); // Add a handler which will be notified on progress changes. // It will notify on each chunk download and when the // download is completed or failed. request.MediaDownloader.ProgressChanged += progress => switch (progress.Status) case DownloadStatus.Downloading: Console.WriteLine(progress.BytesDownloaded); break; case DownloadStatus.Completed: Console.WriteLine("Download complete."); break; case DownloadStatus.Failed: Console.WriteLine("Download failed."); break; ; request.Download(stream); return stream; catch (Exception e) // TODO(developer) - handle error appropriately if (e is AggregateException) Console.WriteLine("Credential Not found"); else throw; return null; This code sample uses a library method that adds the alt=media URL parameterto the underlying HTTP request.


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