Retrieves object metadata. When alt=media is included as a query
parameter, retrieves object data.
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The authenticated user must have sufficient permission to use this method.
This method supports the use of the Range
header, which can be used to retrieve only part of the object data.
For examples of performing object downloads with different Cloud Storage tools and client libraries, see the Downloading Objects guide.
Request
HTTP request
GET https://storage.googleapis.com/storage/v1/b/bucket/o/object
In addition to standard query parameters, the following query parameters apply to this method.
To see an example of how to include query parameters in a request, see the JSON API Overview page.
Parameters
| Parameter name | Value | Description |
|---|---|---|
| Path parameters | ||
bucket |
string |
Name of the bucket in which the object resides. |
object |
string |
Name of the object. For information about how to URL encode object names to be path safe, see Encoding URI path parts. |
| Optional query parameters | ||
alt |
string |
Type of data to return. Defaults to json.
Acceptable values are:
|
generation |
long |
If present, selects a specific revision of this object (as opposed to the latest version, the default). |
ifGenerationMatch |
long |
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 |
long |
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 |
long |
Makes the operation conditional on whether the object's current metageneration matches the given value. |
ifMetagenerationNotMatch |
long |
Makes the operation conditional on whether the object's current metageneration does not match the given value. |
projection |
string |
Set of properties to return. Defaults to noAcl.
Acceptable values are:
|
| Optional extension headers | ||
X-Goog-Encryption-Algorithm |
string |
The encryption algorithm to use, which must be AES256. Use this header if the
object is encrypted with a customer-supplied
encryption key and you want the object's data or content hashes returned in the
response.
|
X-Goog-Encryption-Key |
string |
An RFC 4648 Base64-encoded string of your AES-256 encryption key. Use this header if the object is encrypted with a customer-supplied encryption key and you want the object's data or content hashes returned in the response. |
X-Goog-Encryption-Key-Sha256 |
string |
An RFC 4648 Base64-encoded string of the SHA256 hash of your encryption key. Use this header if the object is encrypted with a customer-supplied encryption key and you want the object's data or content hashes returned in the response. |
Request body
Do not supply a request body with this method.
Response
By default, this responds with an object
resource in the response body. If you provide the URL parameter alt=media,
then it will respond with the object data in the response body.
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Use the APIs Explorer below to call this method on live data and see the response.