waihona

Usage

All cloud providers are on by default, to specify a single provider e.g aws:

[dependencies]
waihona={version = "0.0.3", features = ["aws"], default-features = false }

Rust library for cloud storage across major cloud providers It aims to provide simple to use functions to perform CRUD operations on buckets and blobs. Waihona simply means storage in Hawaiian

Feature Flags

The following feature flags exist for this crate

• aws: Enable aws provider and dependencies
• gcp: Enable gcp provider and dependencies
• azure: Enable azure provider and dependencies

Traits

Three major traits control behaviour for each provider

Buckets -> Bucket -> Blob

// all methods of traits are async
 use bytes::Bytes;

 trait Buckets<T, P>
     where T: Bucket<P>, P: Blob{
         fn open(&mut self, bucket_name: &str);
         fn create(&mut self, bucket_name: &str, location: Option<String>);
         fn list(&mut self);
         fn delete(&mut self, bucket_name: &str);
         fn exists(&mut self, bucket_name: &str);
    }

trait Bucket<P>
    where P: Blob{
        fn list_blobs(&self, marker: Option<String>);
        fn get_blob(&self, blob_path: &str, content_range: Option<String>);
        fn copy_blob(&self, blob_path: &str, blob_destination_path: &str, content_type: Option<String>);
        fn write_blob(&self, blob_name: &str, content: Option<Bytes>);
        fn delete_blob(&self, blob_path: &str);
    }

 trait Blob {
     fn delete(&self);
     fn copy(&self, blob_destination_path: &str, content_type: Option<String> );
     fn write(&self, content: Option<Bytes>);
     fn read(&mut self);
    }

Examples

These quick examples will show you how to make use of the library for basic actions

List buckets from project waihona on GCP

// ensure to export service credential using GOOGLE_APPLICATION_CREDENTIALS
#[cfg(feature = "gcp")]
use waihona::providers::gcp::GcpBucket;

#[tokio::test]
#[cfg(feature = "gcp")]
async fn test_list_buckets() -> Vec<GcpBucket> {
   // Import Buckets trait from crate
   use waihona::types::bucket::{Buckets};
   use waihona::providers::gcp;
   let mut gcp_buckets = providers::gcp::GcpBuckets::new(
       "waihona"
       );
   // Returns (Vec<GcpBucket, Option<String>)
   // where Option<String> is the cursor for the token for next page listing
   let resp = gcp_buckets.list().await;
   resp[0]
}

Check bucket waihona exists on AWS

#[tokio::test]
#[cfg(feature = "aws")]
async fn test_bucket_exists() -> bool {
   use waihona::types::bucket::{Buckets};
   use waihona::providers;
   let mut aws_buckets = providers::aws::AwsBuckets::new(
       "us-east-2"
       );
   let resp = aws_buckets.exists(
       "waihona"
       ).await;
       // OR you can do
   let resp = providers::aws::AwsBucket::exists(
       "us-east-2",
       "waihona"
       ).await;
   resp
}

Write content to a blob "example.txt" in waihona bucket on Azure

#[cfg(feature = "azure")]
use waihona::providers::azure::AzureBlob;



#[tokio::test]
#[cfg(feature = "azure")]
async fn test_create_blob() -> AzureBlob {
   use waihona::types::bucket::{Buckets, Bucket};
   use waihona::types::blob::{Blob};
   use waihona::providers;
   use bytes::Bytes;
   let mut azure_buckets = providers::azure::AzureBuckets::new("waihona".to_owned());
   let waihona = azure_buckets.open(
       "waihona",
       ).await.unwrap();
   let mut blob = waihona.write_blob(
       "example.txt",
        Some(Bytes::from("Hello world"))
       ).await
       .unwrap();
    let read = blob.read().await.unwrap();
    assert!(read.eq(&Bytes::from("Hello world")));
 }

Copy file content from "example.txt" blob on AWS to blob on GCP and delete AWS blob afterwards assuming waihona buckets exist on both platforms

#[cfg(feature = "gcp")]
use waihona::providers::gcp::GcpBlob;


#[tokio::test]
#[cfg(all(feature = "gcp", feature = "aws" ))]
async fn test_transfer_blob() -> GcpBlob {
   use waihona::types::bucket::{Buckets, Bucket};
   use waihona::types::blob::{Blob};
   use waihona::providers;
   use bytes::Bytes;
   let mut aws_blob = providers::aws::AwsBlob::get(
       "us-east-2", // Region
       "waihona", // Bucket name
       "example.txt", // Blob name
       None // Content range
       ).await
       .unwrap();
   let mut gcp_blob = providers::gcp::GcpBlob::get(
       "gcp-project-name", // Project name
       "waihona", // Bucket name
       "example.txt", // Blob name
       None // Content range
       ).await
       .unwrap();
   let content: Bytes = aws_blob.read().unwrap();
   gcp_blob.write(Some(content)).await.unwrap();
    aws_blob.delete().unwrap();
    gcp_blob
 }

License

This project is opened under the MIT License which allows very broad use for both academic and commercial purposes