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@bytescale/sdk
Advanced tools
Bytescale is the developer platform for images, video, and audio.
Use the Bytescale JavaScript SDK to upload, transform, and serve files at scale.
Full SDK Documentation • Upload Widget • Media Processing APIs • Storage • CDN
Installation
For Node.js:
npm install @bytescale/sdk node-fetch
For Browsers:
npm install @bytescale/sdk
Or:
<script src="https://js.bytescale.com/sdk/v3"></script>
Uploading Files
This library is isomorphic, which means you can upload files from Node.js, or the browser, or both.
From Node.js:
import * as Bytescale from "@bytescale/sdk";
import nodeFetch from "node-fetch";
const uploadManager = new Bytescale.UploadManager({
fetchApi: nodeFetch, // import nodeFetch from "node-fetch"; // Only required for Node.js. TypeScript: 'nodeFetch as any' may be necessary.
apiKey: "free" // Get API keys from: www.bytescale.com
});
uploadManager
.upload({
// Supported types:
// - String
// - Blob
// - ArrayBuffer
// - Buffer
// - ReadableStream (Node.js), e.g. fs.createReadStream("file.txt")
data: "Hello World",
// ---------
// Optional:
// ---------
// Required if 'data' is a stream.
// size: 5098, // e.g. fs.statSync("file.txt").size
// Required if 'data' is a stream, buffer, or string.
mime: "text/plain",
// Required if 'data' is a stream, buffer, or string.
originalFileName: "my_file.txt"
// Reports progress: bytesTotal, bytesSent, progress.
// onProgress: ({ progress }) => console.log(progress),
// Controls multipart upload concurrency. Ignored if 'data' is a stream.
// maxConcurrentUploadParts: 4,
// Up to 2KB of arbitrary JSON.
// metadata: {
// productId: 60891
// },
// Up to 25 tags per file.
// tags: [
// "example_tag"
// ],
// About file paths:
// - Your API key's "file upload path" is used by default, and can be changed by editing the API key's settings.
// - You can override the API key's file upload path by specifying a path below.
// - You may use path variables (e.g. "{UTC_DAY}"): http://localhost:3201/docs/path-variables
// path: {
// folderPath: "/uploads/{UTC_YEAR}/{UTC_MONTH}/{UTC_DAY}",
// fileName: "{UTC_TIME_TOKEN_INVERSE}{UNIQUE_DIGITS_2}{ORIGINAL_FILE_EXT}"
// },
// Set to 'isCancelled = true' after invoking 'upload' to cancel the upload.
// cancellationToken: {
// isCancelled: false
// }
})
.then(
({ fileUrl, filePath }) => {
// --------------------------------------------
// File successfully uploaded!
// --------------------------------------------
// The 'filePath' uniquely identifies the file,
// and is what you should save to your DB.
// --------------------------------------------
console.log(`File uploaded to: ${fileUrl}`);
},
error => console.error(`Error: ${error.message}`, error)
);
From the Browser:
<html>
<head>
<script src="https://js.bytescale.com/sdk/v3"></script>
<script>
// import * as Bytescale from "@bytescale/sdk"
const uploadManager = new Bytescale.UploadManager({
apiKey: "free" // Get API keys from: www.bytescale.com
});
const onFileSelected = async event => {
const file = event.target.files[0];
try {
const { fileUrl, filePath } = await uploadManager.upload({
// Supported types:
// - String
// - Blob
// - ArrayBuffer
// - File (i.e. from a DOM file input element)
data: file
// ---------
// Optional:
// ---------
// Required if 'data' is a stream. (Not required for DOM file inputs, blobs, buffers, or strings.)
// size: 5098, // e.g. fs.statSync("file.txt").size
// Required if 'data' is a stream, buffer, or string. (Not required for DOM file inputs or blobs.)
// mime: "application/octet-stream",
// Required if 'data' is a stream, buffer, or string. (Not required for DOM file inputs or blobs.)
// originalFileName: "my_file.txt",
// Reports progress: bytesTotal, bytesSent, progress.
// onProgress: ({ progress }) => console.log(progress),
// Controls multipart upload concurrency. Ignored if 'data' is a stream.
// maxConcurrentUploadParts: 4,
// Up to 2KB of arbitrary JSON.
// metadata: {
// productId: 60891
// },
// Up to 25 tags per file.
// tags: [
// "example_tag"
// ],
// About file paths:
// - Your API key's "file upload path" is used by default, and can be changed by editing the API key's settings.
// - You can override the API key's file upload path by specifying a path below.
// - You may use path variables (e.g. "{UTC_DAY}"): http://localhost:3201/docs/path-variables
// path: {
// folderPath: "/uploads/{UTC_YEAR}/{UTC_MONTH}/{UTC_DAY}",
// fileName: "{UTC_TIME_TOKEN_INVERSE}{UNIQUE_DIGITS_2}{ORIGINAL_FILE_EXT}"
// },
// Set to 'isCancelled = true' after invoking 'upload' to cancel the upload.
// cancellationToken: {
// isCancelled: false
// }
});
// --------------------------------------------
// File successfully uploaded!
// --------------------------------------------
// The 'filePath' uniquely identifies the file,
// and is what you should save to your API.
// --------------------------------------------
alert(`File uploaded:\n${fileUrl}`);
} catch (e) {
alert(`Error:\n${e.message}`);
}
};
</script>
</head>
<body>
<input type="file" onchange="onFileSelected(event)" />
</body>
</html>
Downloading Files
import * as Bytescale from "@bytescale/sdk";
import nodeFetch from "node-fetch"; // Only required for Node.js
const fileApi = new Bytescale.FileApi({
fetchApi: nodeFetch, // import nodeFetch from "node-fetch"; // Only required for Node.js. TypeScript: 'nodeFetch as any' may be necessary.
apiKey: "YOUR_API_KEY" // e.g. "secret_xxxxx"
});
fileApi
.downloadFile({
accountId: "YOUR_ACCOUNT_ID", // e.g. "W142hJk"
filePath: "/uploads/2022/12/25/hello_world.txt"
})
.then(response => response.text()) // .text() | .json() | .blob() | .stream()
.then(
fileContents => console.log(fileContents),
error => console.error(error)
);
Use the UrlBuilder to get a URL to your file (if you need a URL instead of downloading the file).
Processing Files
import * as Bytescale from "@bytescale/sdk";
import fetch from "node-fetch"; // Only required for Node.js
import fs from "fs";
const fileApi = new Bytescale.FileApi({
fetchApi: nodeFetch, // import nodeFetch from "node-fetch"; // Only required for Node.js. TypeScript: 'nodeFetch as any' may be necessary.
apiKey: "YOUR_API_KEY" // e.g. "secret_xxxxx"
});
fileApi
.processFile({
accountId: "YOUR_ACCOUNT_ID", // e.g. "W142hJk"
filePath: "/uploads/2022/12/25/image.jpg",
// See: https://www.bytescale.com/docs/image-processing-api
transformation: "image",
transformationParams: {
w: 800,
h: 600
}
})
.then(response => response.stream()) // .text() | .json() | .blob() | .stream()
.then(
imageByteStream =>
new Promise((resolve, reject) => {
const writer = fs.createWriteStream("image-thumbnail.jpg");
writer.on("close", resolve);
writer.on("error", reject);
imageByteStream.pipe(writer);
})
)
.then(
() => console.log("Thumbnail saved to 'image-thumbnail.jpg'"),
error => console.error(error)
);
Use the UrlBuilder to get a URL to your file (if you need a URL instead of downloading the file).
Get File Details
import * as Bytescale from "@bytescale/sdk";
import fetch from "node-fetch"; // Only required for Node.js
const fileApi = new Bytescale.FileApi({
fetchApi: nodeFetch, // import nodeFetch from "node-fetch"; // Only required for Node.js. TypeScript: 'nodeFetch as any' may be necessary.
apiKey: "YOUR_API_KEY" // e.g. "secret_xxxxx"
});
fileApi
.getFileDetails({
accountId: "YOUR_ACCOUNT_ID", // e.g. "W142hJk"
filePath: "/uploads/2022/12/25/image.jpg"
})
.then(
fileDetails => console.log(fileDetails),
error => console.error(error)
);
Listing Folders
import * as Bytescale from "@bytescale/sdk";
import fetch from "node-fetch"; // Only required for Node.js
const folderApi = new Bytescale.FolderApi({
fetchApi: nodeFetch, // import nodeFetch from "node-fetch"; // Only required for Node.js. TypeScript: 'nodeFetch as any' may be necessary.
apiKey: "YOUR_API_KEY" // e.g. "secret_xxxxx"
});
folderApi
.listFolder({
accountId: "YOUR_ACCOUNT_ID", // e.g. "W142hJk"
folderPath: "/",
recursive: false
})
.then(
// Note: operation is paginated, see 'result.cursor' and 'params.cursor'.
result => console.log(`Items in folder: ${result.items.length}`),
error => console.error(error)
);
More Operations
For a complete list of operations, please see:
Bytescale JavaScript SDK Docs »
Authorization
The Bytescale JavaScript SDK supports two types of authorization:
API Keys
The Bytescale JavaScript SDK automatically adds the apiKey from the constructor to the Authorization header for all requests made via the SDK.
With API key auth, the requester has access to the resources available to the API key:
-
Secret API keys (
secret_***) have access to all API endpoints. -
Public API keys (
public_***) have access to file upload, file download, and file listing API endpoints. (File listing is disabled by default. This can be changed in the API key's settings.)
Each Public API Key and Secret API Key can have its read/write access limited to a subset of files/folders.
JWT Cookies
JWT cookies are optional.
With JWT cookies, the user can download private files directly via the URL, as authorization is performed implicitly via a session cookie. This allows the browser to display private files in <img> and <video> elements.
With JWT cookies, the user can also perform API requests (e.g. file uploads) granted by the JWT's payload. This is because the Bytescale JavaScript SDK automatically injects the user's JWT into the authorization-token request header for all API requests, assuming the AuthManager.beginAuthSession method has been called.
Note: when using JWT cookies to download files, the ?auth=true query parameter must be added to the URL.
Learn more about the AuthManager and JWT cookies »
UrlBuilder
Use the UrlBuilder to make URLs for your uploaded files:
import { UrlBuilder } from "@bytescale/sdk";
Raw Files
To get the URL for the uploaded image /example.jpg in its original form, use the following params:
// Returns: "https://upcdn.io/1234abc/raw/example.jpg"
UrlBuilder.url({
accountId: "1234abc",
filePath: "/example.jpg"
});
Images
To resize the uploaded image /example.jpg to 800x600, use the following params:
// Returns: "https://upcdn.io/1234abc/image/example.jpg?w=800&h=600"
UrlBuilder.url({
accountId: "1234abc",
filePath: "/example.jpg",
options: {
transformation: "image",
transformationParams: {
w: 800,
h: 600
}
}
});
Videos
To transcode the uploaded video /example.mov to MP4/H.264 in HD, use the following params:
// Returns: "https://upcdn.io/1234abc/video/example.mov?f=mp4-h264&h=1080"
UrlBuilder.url({
accountId: "1234abc",
filePath: "/example.mov",
options: {
transformation: "video",
transformationParams: {
f: "mp4-h264",
h: 1080
}
}
});
Audio
To transcode the uploaded audio /example.wav to AAC in 192kbps, use the following params:
// Returns: "https://upcdn.io/1234abc/audio/example.wav?f=aac&br=192"
UrlBuilder.url({
accountId: "1234abc",
filePath: "/example.wav",
options: {
transformation: "audio",
transformationParams: {
f: "aac",
br: 192
}
}
});
Archives
To extract the file document.docx from the uploaded ZIP file /example.zip, use the following params:
// Returns: "https://upcdn.io/1234abc/archive/example.zip?m=extract&artifact=/document.docx"
UrlBuilder.url({
accountId: "1234abc",
filePath: "/example.zip",
options: {
transformation: "archive",
transformationParams: {
m: "extract"
},
artifact: "/document.docx"
}
});
👋 Create your Bytescale Account
Bytescale is the best way to serve images, videos, and audio for web apps.
🙋 Can I use my own storage?
Bytescale supports AWS S3, Cloudflare R2, Google Storage, DigitalOcean Spaces, and Bytescale Storage.
Bytescale JavaScript SDK Docs »
License
FAQs
Bytescale JavaScript SDK
The npm package @bytescale/sdk receives a total of 11,873 weekly downloads. As such, @bytescale/sdk popularity was classified as popular.
We found that @bytescale/sdk demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 0 open source maintainers collaborating on the project.
Package last updated on 15 Sep 2023
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