# [
](https://github.com/ChenglongMa/skipper-gcstorage.git) Google Cloud Storage Blob Adapter
**Google Cloud Storage** adapter for receiving [upstreams](https://github.com/balderdashy/skipper#what-are-upstreams).
Particularly useful for handling streaming multipart file uploads from
the [Skipper](https://github.com/balderdashy/skipper) body parser.
## Installation
### Option 1: NPM Package
[](https://npmjs.org/package/skipper-gcstorage)
```bash
$ npm i skipper-gcstorage
```
### Option2: GitHub Package
[](https://github.com/ChenglongMa/skipper-gcstorage/packages)
```bash
$ npm i @chenglongma/skipper-gcstorage
```
## Changelog
### Ver 2.3.0
1. Add `keepName` option which can set whether to use original filename or a generated UUID name.
2. Update dependencies to the latest version.
### Ver 2.2.0
1. Update dependencies to the latest version.
1. [sharp](https://sharp.pixelplumbing.com/): 0.29.2, now it supports M1 chipset (
thanks [lahiruelectrily (github.com)](https://github.com/lahiruelectrily))
2. [mime](https://www.npmjs.com/package/mime): 3.0.0
### Ver 2.1.0
Thanks [jspark-gigworks (Anselmo Park)](https://github.com/jspark-gigworks) so much for his comments!
1. Emit `writefile` event when finishing the job.
2. Support additional `CreateWriteStreamOptions` listed
in https://googleapis.dev/nodejs/storage/latest/global.html#CreateWriteStreamOptions.
### Ver 2.0.0
1. Add `resize` options, which can compress the **images** before uploading.
## Usage
```javascript
req.file('avatar')
.upload({
// Required
adapter: require('skipper-gcstorage'),
bucket: 'existing_or_new_bucket_name', // Will create new one if no such bucket exists.
// Optional
projectId: 'GOOGLE_CLOUD_PROJECT', // Mandatory if `keyFilename` was specified.
keyFilename: '/path/to/GOOGLE_APPLICATION_CREDENTIALS.json',
bucketMetadata: {
location: 'us-west1',
}, // Refer to https://googleapis.dev/nodejs/storage/latest/global.html#CreateBucketRequest
maxBytes: 60000,
metadata: {},
public: true,
gzip: true,
keepName: false,
// Other options in `CreateWriteStreamOptions`
// Refer to https://googleapis.dev/nodejs/storage/latest/global.html#CreateWriteStreamOptions
...CreateWriteStreamOptions,
resize: {
width: 500,
height: 500
}, // Refer to https://sharp.pixelplumbing.com/api-resize#resize
}, function whenDone(err, uploadedFiles) {
if (err) {
return res.serverError(err);
}
return res.ok({
files: uploadedFiles,
textParams: req.params.all()
});
});
```
Please don't check in your GCP credentials :)
### Parameters
| Name | Type | Required | Default Value | Description |
|-----------------------------|-------------------------------------------|-----------------------------------|--------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| bucket | string | Yes | None | Bucket name in GCP, will create new one if there is no such bucket. |
| projectId | string | Yes if `keyFilename` is specified | None, will try to read `process.env.GOOGLE_CLOUD_PROJECT` if not set | "GOOGLE_CLOUD_PROJECT", please refer to [Google Cloud Storage#using-the-client-library](https://googleapis.dev/nodejs/storage/latest/index.html#using-the-client-library) |
| keyFilename | string | No | None, will try to read `process.env.GOOGLE_APPLICATION_CREDENTIALS` if not set | "/path/to/GOOGLE_APPLICATION_CREDENTIALS.json" |
| bucketMetadata | dictionary | No | {} | Metadata to set for the bucket. Refer to [Google Cloud Storage#CreateBucketRequest](https://googleapis.dev/nodejs/storage/latest/global.html#CreateBucketRequest) |
| metadata | dictionary | No | {} | Extra info attached to the file |
| public | boolean | No | true | Whether to make the file public |
| keepName | boolean or string | No | false | Whether to use original filename. The uploaded file will be set to:
* a **UUID name** if `keepName=false`;
* its **original name** if `keepName=true`;
* the value of `keepName` if `keepName` is a string |
| ...CreateWriteStreamOptions | expanded dictionary | No | {} | Options for `File#createWriteStream()`. Refer to [Google Cloud Storage#CreateWriteStreamOptions](https://googleapis.dev/nodejs/storage/latest/global.html#CreateWriteStreamOptions) |
| resize | dictionary with keys `width` and `height` | No | {} | The new size of image. Only works when the file is an image. Refer to [sharp#resize](https://sharp.pixelplumbing.com/api-resize#resize). |
### NOTE
1. `Skipper-GCStorage` will create new bucket if specified one does not exist.
1. Assign bucket metadata into `bucketMetadata`.
2. Support multiple ways for **Authentication**
1. Specify `projectId` AND `keyFilename`;
2. `export` `GOOGLE_APPLICATION_CREDENTIALS` environment variable;
3. Login with an eligible [service account](https://cloud.google.com/iam/docs/service-accounts);
4. \*For more details, please refer to https://cloud.google.com/docs/authentication/production#command-line.
3. Use with [sails-hook-uploads](https://www.npmjs.com/package/sails-hook-uploads) for better results :)
4. > Cloud Storage operates with a flat namespace, which means that folders don't actually exist within Cloud Storage.
> If you create an object named `folder1/file.txt` in the bucket `your-bucket`, the path to the object is `your-bucket/folder1/file.txt`,
> but there is no folder named `folder1`; instead, the string `folder1` is part of the object's name.
> Please refer to https://cloud.google.com/storage/docs/folders
## Acknowledgement
1. [Sails Skipper](https://github.com/sailshq/skipper)
2. [Skipper-S3](https://github.com/balderdashy/skipper-s3)
3. [jspark-gigworks (Anselmo Park)](https://github.com/jspark-gigworks)
## Contribution
Pull requests are welcome!