Rainbow bridge for shipping your files to any cloud storage service with the same function calls.
Many projects need to store files in the cloud and different projects might use different cloud storage providers or, sometimes, multiple cloud providers all at once. Using different SDKs with different implementations for each provider can be tedious and time-consuming. Bifrost aims to simplify the process of working with multiple cloud storage providers by providing a consistent API for all of them.
To gain a better understanding of how Bifrost addresses this issue, let's take you on a ride with Thor by comparing two different code samples for working with Google Cloud Storage and Pinata Cloud in a single project: one using a conventional approach and the other using Bifrost.
Without Bifrost, the process of uploading a file to GCS using the Google Cloud Storage client library for Go would typically involve the following steps:
package main
import (
"context"
"fmt"
"io"
"log"
"cloud.google.com/go/storage"
)
func main() {
ctx := context.Background()
// create a client
client, err := storage.NewClient(ctx)
if err != nil {
log.Fatalf("Failed to create client: %v", err)
}
defer client.Close()
// open the file you want to upload
file, err := os.Open("path/to/your/file")
if err != nil {
log.Fatalf("Failed to open file: %v", err)
}
defer file.Close()
// create a bucket object
bucket := client.Bucket("your-bucket-name")
// create an object handle
object := bucket.Object("destination/file/name")
// create a writer to upload the file
writer := object.NewWriter(ctx)
// copy the contents of the file to the object
if _, err := io.Copy(writer, file); err != nil {
log.Fatalf("Failed to upload file: %v", err)
}
// close the writer to finalize the upload
if err := writer.Close(); err != nil {
log.Fatalf("Failed to close writer: %v", err)
}
fmt.Println("File uploaded successfully!")
}...and for Pinata Cloud, the usual way of uploading a file in Go would be something along the following steps:
package main
import (
"bytes"
"fmt"
"io"
"io/ioutil"
"mime/multipart"
"net/http"
"os"
)
func main() {
// Set the API key and secret key
apiKey := "your-api-key"
secretApiKey := "your-secret-api-key"
// Open the file to be uploaded
file, err := os.Open("path/to/file")
if err != nil {
fmt.Println("Error opening file:", err)
return
}
defer file.Close()
// Prepare the request body
body := &bytes.Buffer{}
writer := multipart.NewWriter(body)
part, err := writer.CreateFormFile("file", file.Name())
if err != nil {
fmt.Println("Error creating form file:", err)
return
}
_, err = io.Copy(part, file)
if err != nil {
fmt.Println("Error copying file:", err)
return
}
err = writer.Close()
if err != nil {
fmt.Println("Error closing writer:", err)
return
}
// Prepare the request
url := "https://api.pinata.cloud/pinning/pinFileToIPFS"
req, err := http.NewRequest("POST", url, body)
if err != nil {
fmt.Println("Error creating request:", err)
return
}
req.Header.Add("Content-Type", writer.FormDataContentType())
req.Header.Add("pinata_api_key", apiKey)
req.Header.Add("pinata_secret_api_key", secretApiKey)
// Send the request
client := &http.Client{}
resp, err := client.Do(req)
if err != nil {
fmt.Println("Error sending request:", err)
return
}
defer resp.Body.Close()
// Read the response body
respBody, err := ioutil.ReadAll(resp.Body)
if err != nil {
fmt.Println("Error reading response:", err)
return
}
// Print the response
fmt.Println(string(respBody))
}We can already see the challenges of the conventional methods since they require you to learn to use multiple packages with separate implementation patterns. Now this is why Bifrost comes in! With Bifrost, you can mount rainbow bridges to the providers you want and use the same set of functions to upload files through any of these mounted bridges. This makes it much easier to work with multiple providers and streamlines the development process to just one learning curve.
Now, let's see how we can revamp the two samples above into something much more exciting with Bifrost.
package main
import (
"fmt"
"os"
"github.com/opensaucerer/bifrost"
)
// mount a bridge to gcs
gcsBridge, _ := bifrost.NewRainbowBridge(&bifrost.BridgeConfig{
DefaultBucket: "bifrost",
DefaultTimeout: 10,
Provider: bifrost.GoogleCloudStorage,
CredentialsFile: "/path/to/service/account/json", // this is not required if you are using google's default credentials
EnableDebug: true,
PublicRead: true,
})
defer gcsBridge.Disconnect()
fmt.Printf("Connected to %s\n", gcsBridge.Config().Provider)
// mount a bridge to Pinata
pinataBridge, _ := bifrost.NewRainbowBridge(&bifrost.BridgeConfig{
Provider: bifrost.PinataCloud,
PinataJWT: os.Getenv("PINATA_JWT"),
EnableDebug: true,
PublicRead: true,
})
defer pinataBridge.Disconnect()
fmt.Printf("Connected to %s\n", pinataBridge.Config().Provider)
// upload a file to gcs using the bridge
guf, _ := gcsBridge.UploadFile(bifrost.File{
Path: "../shared/image/aand.png",
Filename: "a_and_ampersand.png",
Options: map[string]interface{}{
bifrost.OptMetadata: map[string]string{
"originalname": "aand.png",
},
},
})
fmt.Printf("Uploaded file %s to GCS at: %s\n", guf.Name, guf.Preview)
// upload a file to Pinata using the bridge
puf, _ := bridge.UploadFile(bifrost.File{
Path: "../shared/image/aand.png",
Filename: "pinata_aand.png",
Options: map[string]interface{}{
bifrost.OptPinata: map[string]interface{}{
"cidVersion": 1,
},
bifrost.OptMetadata: map[string]string{
"originalname": "aand.png",
},
},
})
fmt.Printf("Uploaded file %s to Pinata at: %s\n", puf.Name, puf.Preview)The above example clearly demonstrates the speed, simplicity, and ease of use that Bifrost offers. Now you know what it feels like to ride with Thor!
To install the Bifrost package, run the following command in your terminal:
go get github.com/opensaucerer/bifrostIf you want to learn more about how Bifrost is creating different methods to make it easier to use different cloud providers, you can follow these links:
Bifrost also exists in other forms and languages and you are free to start a new variant of bifrost in any other form or language of your choice. For now, below are the know variants of bifrost.
Bifrost is an open source project and we welcome contributions of all kinds. Please read our contributing guide to learn about our development process, how to propose bug fixes and improvements, and how to build and test your changes to Bifrost.
Bifrost is MIT licensed.
See changelog for more details.
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