Huawei OBS binding spec

Detailed documentation on the Huawei OBS binding component

Component format

To setup Huawei Object Storage Service (OBS) (output) binding create a component of type bindings.huawei.obs. See this guide on how to create and apply a binding configuration.

apiVersion: dapr.io/v1alpha1
kind: Component
metadata:
  name: <NAME>
spec:
  type: bindings.huawei.obs
  version: v1
  - name: bucket
    value: <your-bucket-name>
  - name: endpoint
    value: <obs-bucket-endpoint>
  - name: accessKey
    value: <your-access-key>
  - name: secretKey
    value: <your-secret-key>
  # optional fields
  - name: region
    value: <your-bucket-region>

Warning

The above example uses secrets as plain strings. It is recommended to use a secret store for the secrets as described here.

Spec metadata fields

Binding support

This component supports output binding with the following operations:

• create : Create file
• upload : Upload file
• get : Get file
• delete : Delete file
• list: List file

Create file

To perform a create operation, invoke the Huawei OBS binding with a POST method and the following JSON body:

Note: by default, a random UUID is generated. See below for Metadata support to set the destination file name

{
  "operation": "create",
  "data": "YOUR_CONTENT"
}

Examples

Save text to a random generated UUID file

• Windows
• Linux

On Windows, utilize cmd prompt (PowerShell has different escaping mechanism)

curl -d "{ \"operation\": \"create\", \"data\": \"Hello World\" }" http://localhost:<dapr-port>/v1.0/bindings/<binding-name>

curl -d '{ "operation": "create", "data": "Hello World" }' \
      http://localhost:<dapr-port>/v1.0/bindings/<binding-name>

Save text to a specific file

• Windows
• Linux

curl -d "{ \"operation\": \"create\", \"data\": \"Hello World\", \"metadata\": { \"key\": \"my-test-file.txt\" } }" \
      http://localhost:<dapr-port>/v1.0/bindings/<binding-name>

curl -d '{ "operation": "create", "data": "Hello World", "metadata": { "key": "my-test-file.txt" } }' \
      http://localhost:<dapr-port>/v1.0/bindings/<binding-name>

Response

The response JSON body contains the statusCode and the versionId fields. The versionId will have a value returned only if the bucket versioning is enabled and an empty string otherwise.

Upload file

To upload a binary file (for example, .jpg, .zip), invoke the Huawei OBS binding with a POST method and the following JSON body:

Note: by default, a random UUID is generated, if you don’t specify the key. See the example below for metadata support to set the destination file name. This API can be used to upload a regular file, such as a plain text file.

{
  "operation": "upload",
  "metadata": {
     "key": "DESTINATION_FILE_NAME"
   },
  "data": {
     "sourceFile": "PATH_TO_YOUR_SOURCE_FILE"
   }
}

Example

• Windows
• Linux

curl -d "{ \"operation\": \"upload\", \"data\": { \"sourceFile\": \".\my-test-file.jpg\" }, \"metadata\": { \"key\": \"my-test-file.jpg\" } }" \
      http://localhost:<dapr-port>/v1.0/bindings/<binding-name>

curl -d '{ "operation": "upload", "data": { "sourceFile": "./my-test-file.jpg" }, "metadata": { "key": "my-test-file.jpg" } }' \
      http://localhost:<dapr-port>/v1.0/bindings/<binding-name>

Response

The response JSON body contains the statusCode and the versionId fields. The versionId will have a value returned only if the bucket versioning is enabled and an empty string otherwise.

Get object

To perform a get file operation, invoke the Huawei OBS binding with a POST method and the following JSON body:

{
  "operation": "get",
  "metadata": {
    "key": "my-test-file.txt"
  }
}

The metadata parameters are:

• key - the name of the object

Example

• Windows
• Linux

curl -d '{ \"operation\": \"get\", \"metadata\": { \"key\": \"my-test-file.txt\" }}' http://localhost:<dapr-port>/v1.0/bindings/<binding-name>

curl -d '{ "operation": "get", "metadata": { "key": "my-test-file.txt" }}' \
      http://localhost:<dapr-port>/v1.0/bindings/<binding-name>

Response

The response body contains the value stored in the object.

Delete object

To perform a delete object operation, invoke the Huawei OBS binding with a POST method and the following JSON body:

{
  "operation": "delete",
  "metadata": {
    "key": "my-test-file.txt"
  }
}

The metadata parameters are:

• key - the name of the object

Examples

Delete object

• Windows
• Linux

curl -d '{ \"operation\": \"delete\", \"metadata\": { \"key\": \"my-test-file.txt\" }}' http://localhost:<dapr-port>/v1.0/bindings/<binding-name>

curl -d '{ "operation": "delete", "metadata": { "key": "my-test-file.txt" }}' \
      http://localhost:<dapr-port>/v1.0/bindings/<binding-name>

Response

An HTTP 204 (No Content) and empty body are returned if successful.

List objects

To perform a list object operation, invoke the Huawei OBS binding with a POST method and the following JSON body:

{
  "operation": "list",
  "data": {
    "maxResults": 5,
    "prefix": "dapr-",
    "marker": "obstest",
    "delimiter": "jpg"
  }
}

The data parameters are:

• maxResults - (optional) sets the maximum number of keys returned in the response. By default the action returns up to 1,000 key names. The response might contain fewer keys but will never contain more.
• prefix - (optional) limits the response to keys that begin with the specified prefix.
• marker - (optional) marker is where you want Huawei OBS to start listing from. Huawei OBS starts listing after this specified key. Marker can be any key in the bucket. The marker value may then be used in a subsequent call to request the next set of list items.
• delimiter - (optional) A delimiter is a character you use to group keys. It returns objects/files with their object key other than that is specified by the delimiter pattern.

Example

• Windows
• Linux

curl -d '{ \"operation\": \"list\", \"data\": { \"maxResults\": 5, \"prefix\": \"dapr-\", \"marker\": \"obstest\", \"delimiter\": \"jpg\" }}' http://localhost:<dapr-port>/v1.0/bindings/<binding-name>

curl -d '{ "operation": "list", "data": { "maxResults": 5, "prefix": "dapr-", "marker": "obstest", "delimiter": "jpg" }}' \
      http://localhost:<dapr-port>/v1.0/bindings/<binding-name>

Response

The response body contains the list of found objects.

Related links

• Basic schema for a Dapr component
• Bindings building block
• How-To: Trigger application with input binding
• How-To: Use bindings to interface with external resources
• Bindings API reference

Last modified July 27, 2022: Remove namespace element from component examples (#2647) (ff9de5c8)