get method

Future<Object> get(String bucket, String object, { String? generation, String? ifGenerationMatch, String? ifGenerationNotMatch, String? ifMetagenerationMatch, String? ifMetagenerationNotMatch, String? projection, String? userProject, String? $fields, DownloadOptions downloadOptions = commons.DownloadOptions.metadata, })

Retrieves an object or its metadata.

Request parameters:

bucket - Name of the bucket in which the object resides.

object - Name of the object. For information about how to URL encode object names to be path safe, see Encoding URI Path Parts.

generation - If present, selects a specific revision of this object (as opposed to the latest version, the default).

ifGenerationMatch - Makes the operation conditional on whether the object's current generation matches the given value. Setting to 0 makes the operation succeed only if there are no live versions of the object.

ifGenerationNotMatch - Makes the operation conditional on whether the object's current generation does not match the given value. If no live object exists, the precondition fails. Setting to 0 makes the operation succeed only if there is a live version of the object.

ifMetagenerationMatch - Makes the operation conditional on whether the object's current metageneration matches the given value.

ifMetagenerationNotMatch - Makes the operation conditional on whether the object's current metageneration does not match the given value.

projection - Set of properties to return. Defaults to noAcl. Possible string values are:

• "full" : Include all properties.
• "noAcl" : Omit the owner, acl property.

userProject - The project to be billed for this request. Required for Requester Pays buckets.

$fields - Selector specifying which fields to include in a partial response.

downloadOptions - Options for downloading. A download can be either a Metadata (default) or Media download. Partial Media downloads are possible as well.

Completes with a

• Object for Metadata downloads (see downloadOptions).

• commons.Media for Media downloads (see downloadOptions).

Completes with a commons.ApiRequestError if the API endpoint returned an error.

If the used http.Client completes with an error when making a REST call, this method will complete with the same error.

Implementation

async.Future<core.Object> get(
  core.String bucket,
  core.String object, {
  core.String? generation,
  core.String? ifGenerationMatch,
  core.String? ifGenerationNotMatch,
  core.String? ifMetagenerationMatch,
  core.String? ifMetagenerationNotMatch,
  core.String? projection,
  core.String? userProject,
  core.String? $fields,
  commons.DownloadOptions downloadOptions = commons.DownloadOptions.metadata,
}) async {
  final _queryParams = <core.String, core.List<core.String>>{
    if (generation != null) 'generation': [generation],
    if (ifGenerationMatch != null) 'ifGenerationMatch': [ifGenerationMatch],
    if (ifGenerationNotMatch != null)
      'ifGenerationNotMatch': [ifGenerationNotMatch],
    if (ifMetagenerationMatch != null)
      'ifMetagenerationMatch': [ifMetagenerationMatch],
    if (ifMetagenerationNotMatch != null)
      'ifMetagenerationNotMatch': [ifMetagenerationNotMatch],
    if (projection != null) 'projection': [projection],
    if (userProject != null) 'userProject': [userProject],
    if ($fields != null) 'fields': [$fields],
  };

  final _url = 'b/' +
      commons.escapeVariable('$bucket') +
      '/o/' +
      commons.escapeVariable('$object');

  final _response = await _requester.request(
    _url,
    'GET',
    queryParams: _queryParams,
    downloadOptions: downloadOptions,
  );
  if (downloadOptions.isMetadataDownload) {
    return Object.fromJson(_response as core.Map<core.String, core.dynamic>);
  } else {
    return _response as commons.Media;
  }
}