Uploadcare Upload Client

This is an Uploadcare Upload API wrapper to work with Node.js and browser.

API Reference

• Install
• Usage
  • High-Level API
  • Low-Level API
  • Settings
  • Uploading queue
• React Native
• Testing
• Security issues
• Feedback

Install

npm install @uploadcare/upload-client

Usage

High-Level API

To access the High-Level API, you need to create an instance of UploadClient providing the necessary settings. Specifying YOUR_PUBLIC_KEY is mandatory: it points to the specific Uploadcare project:

import { UploadClient } from '@uploadcare/upload-client'

const client = new UploadClient({ publicKey: 'YOUR_PUBLIC_KEY' })

Once the UploadClient instance is created, you can start using the wrapper to upload files from binary data:

client.uploadFile(fileData).then((file) => console.log(file.uuid))

Another option is uploading files from URL, via the uploadFile method:

const fileURL = 'https://example.com/file.jpg'

client.uploadFile(fileURL).then((file) => console.log(file.uuid))

You can also use the uploadFile method to get previously uploaded files via their UUIDs:

const fileUUID = 'edfdf045-34c0-4087-bbdd-e3834921f890'

client.uploadFile(fileUUID).then((file) => console.log(file.uuid))

You can track uploading progress:

const fileUUID = 'edfdf045-34c0-4087-bbdd-e3834921f890'
const onProgress = ({ isComputable, value }) => {
  console.log(isComputable, value)
}

client
  .uploadFile(fileUUID, { onProgress })
  .then((file) => console.log(file.uuid))

Note that isComputable flag can be false is some cases of uploading from the URL. If we can't calculate the file size, progress info will look like { isComputable: false } without a value. Successful uploading progress will be always { isComputable: true, value: 1 }.

You can cancel file uploading and track this event:

const fileUUID = 'edfdf045-34c0-4087-bbdd-e3834921f890'
const abortController = new AbortController()

client
  .uploadFile(fileUUID, { signal: abortController.signal })
  .then((file) => console.log(file.uuid))
  .catch((error) => {
    if (error.isCancel) {
      console.log(`File uploading was canceled.`)
    }
  })

// Cancel uploading
abortController.abort()

List of all available UploadClient API methods:

interface UploadClient {
  updateSettings(newSettings: Settings = {}): void

  getSettings(): Settings

  base(
    file: Blob | File | Buffer | ReactNativeAsset,
    options: BaseOptions
  ): Promise<BaseResponse>

  info(uuid: Uuid, options: InfoOptions): Promise<FileInfo>

  fromUrl(sourceUrl: Url, options: FromUrlOptions): Promise<FromUrlResponse>

  fromUrlStatus(
    token: Token,
    options: FromUrlStatusOptions
  ): Promise<FromUrlStatusResponse>

  group(uuids: Uuid[], options: GroupOptions): Promise<GroupInfo>

  groupInfo(id: GroupId, options: GroupInfoOptions): Promise<GroupInfo>

  multipartStart(
    size: number,
    options: MultipartStartOptions
  ): Promise<MultipartStartResponse>

  multipartUpload(
    part: Buffer | Blob,
    url: MultipartPart,
    options: MultipartUploadOptions
  ): Promise<MultipartUploadResponse>

  multipartComplete(
    uuid: Uuid,
    options: MultipartCompleteOptions
  ): Promise<FileInfo>

  uploadFile(
    data: Blob | File | Buffer | ReactNativeAsset | Url | Uuid,
    options: FileFromOptions
  ): Promise<UploadcareFile>

  uploadFileGroup(
    data: (Blob | File | Buffer | ReactNativeAsset)[] | Url[] | Uuid[],
    options: FileFromOptions & GroupFromOptions
  ): Promise<UploadcareGroup>
}

You can import only needed methods directly, without UploadClient wrapper:

import {
  uploadFile,
  uploadFromUrl,
  uploadDirect,
  uploadFromUploaded,
  uploadMultipart,
  uploadFileGroup
} from '@uploadcare/upload-client'

Low-Level API

Also, you can use low-level wrappers to call the API endpoints directly:

import { base } from '@uploadcare/upload-client'

const onProgress = ({ isComputable, value }) => console.log(isComputable, value)
const abortController = new AbortController()

base(fileData, { onProgress, signal: abortController.signal }) // fileData must be `Blob` or `File` or `Buffer`
  .then((data) => console.log(data.file))
  .catch((error) => {
    if (error.isCancel) {
      console.log(`File uploading was canceled.`)
    }
  })

// Also you can cancel upload:
abortController.abort()

List of all available API methods:

base(
  file: Blob | File | Buffer | ReactNativeAsset,
  options: BaseOptions
): Promise<BaseResponse>

info(uuid: Uuid, options: InfoOptions): Promise<FileInfo>

fromUrl(sourceUrl: Url, options: FromUrlOptions): Promise<FromUrlResponse>

fromUrlStatus(
  token: Token,
  options: FromUrlStatusOptions
): Promise<FromUrlStatusResponse>

group(uuids: Uuid[], options: GroupOptions): Promise<GroupInfo>

groupInfo(id: GroupId, options: GroupInfoOptions): Promise<GroupInfo>

multipartStart(
  size: number,
  options: MultipartStartOptions
): Promise<MultipartStartResponse>

multipartUpload(
  part: Buffer | Blob | File,
  url: MultipartPart,
  options: MultipartUploadOptions
): Promise<MultipartUploadResponse>

multipartComplete(
  uuid: Uuid,
  options: MultipartCompleteOptions
): Promise<FileInfo>

Settings

publicKey: string

The main use of a publicKey is to identify a target project for your uploads. It is required when using Upload API.

baseCDN: string

Defines your schema and CDN domain. Can be changed to one of the predefined values (https://ucarecdn.com/) or your custom CNAME.

Defaults to https://ucarecdn.com/.

baseURL: string

API base URL.

Defaults to https://upload.uploadcare.com

fileName: string

You can specify an original filename. It could useful when file input does not contain filename.

Defaults to original.

store: boolean

Forces files uploaded with UploadClient to be stored or not. For instance, you might want to turn this off when automatic file storing is enabled in your project, but you do not want to store files uploaded with a particular instance.

secureSignature: string

In case you enable signed uploads for your project, you’d need to provide the client with secureSignature and secureExpire params.

The secureSignature is an MD5 hex-encoded hash from a concatenation of API secret key and secureExpire.

secureExpire: string

Stands for the Unix time to which the signature is valid, e.g., 1454902434.

userAgent: string | CustomUserAgentFn

type CustomUserAgentOptions = {
  publicKey: string
  libraryName: string
  libraryVersion: string
  languageName: string
  integration?: string
}

type CustomUserAgentFn = (options: CustomUserAgentOptions) => string

X-UC-User-Agent header value.

Defaults to UploadcareUploadClient/${version}/${publicKey} (JavaScript; ${integration})

integration: string

Integration value passed to the X-UC-User-Agent header. May be overrided with the custom user agent string or function.

checkForUrlDuplicates: boolean

Runs the duplicate check and provides the immediate-download behavior.

saveUrlForRecurrentUploads: boolean

Provides the save/update URL behavior. The parameter can be used if you believe that the sourceUrl will be used more than once. Using the parameter also updates an existing reference with a new sourceUrl content.

source: string

Defines the upload source to use, can be set to local, url, etc.

jsonpCallback: string

Sets the name of your JSONP callback function to create files group from a set of files by using their UUIDs.

maxContentLength: number

maxContentLength defines the maximum allowed size (in bytes) of the HTTP response content.

Defaults to 52428800 bytes (50 MB).

retryThrottledRequestMaxTimes: number

Sets the maximum number of attempts to retry throttled requests.

Defaults to 1.

retryNetworkErrorMaxTimes: number

Sets the maximum number of attempts to retry requests that failed with a network error.

Defaults to 3.

The delay between attempts equals attempt number, i.e.

• first attempt - 1 second delay
• second attempt - 2 seconds delay
• third attempt - 3 seconds delay
• ...

multipartChunkSize: number

This option is only applicable when handling local files. Sets the multipart chunk size.

Defaults to 5242880 bytes (5 MB).

multipartMinFileSize: number

This option is only applicable when handling local files. Sets the multipart uploading file size threshold: larger files will be uploaded in the Multipart mode rather than via Direct Upload. The value is limited to the range from 10485760 (10 MB) to 104857600 (100 MB).

Defaults to 26214400 (25 MB).

multipartMinLastPartSize: number

This option is only applicable when handling local files. Set the minimum size of the last multipart part.

Defaults to 1048576 bytes (1 MB).

maxConcurrentRequests: number

Allows specifying the number of concurrent requests.

Defaults to 4.

contentType: string

This option is useful when file input does not contain content type.

Defaults to application/octet-stream.

metadata: Metadata

type Metadata = {
  [key: string]: string
}

Metadata is additional, arbitrary data, associated with uploaded file.

Non-string values will be converted to string. undefined values will be ignored.

See docs and REST API for details.

Uploading queue

If you're going to upload a lot of files at once, it's useful to do it in a queue. Otherwise, a large number of simultaneous requests can clog the internet channel and slow down the process.

To solve this problem, we provide a simple helper called Queue.

Here is an example of how to use it:

import { Queue, uploadFile } from '@uploadcare/upload-client'

// Create a queue with a limit of 10 concurrent requests.
const queue = new Queue(10)

// Create an array containing 50 files.
const files = [
  ...Array(50)
    .fill(0)
    .map((_, idx) => Buffer.from(`content-${idx}`))
]
const promises = files.map((file, idx) => {
  const fileName = `file-${idx}.txt`
  return queue
    .add(() =>
      uploadFile(file, {
        publicKey: 'YOUR_PUBLIC_KEY',
        contentType: 'plain/text',
        fileName
      })
    )
    .then((fileInfo) =>
      console.log(
        `"File "${fileName}" has been successfully uploaded! You can access it at the following URL: "${fileInfo.cdnUrl}"`
      )
    )
})

await Promise.all(promises)

console.log('Files have been successfully uploaded')

You can pass any function that returns a promise to queue.add, and it will be executed concurrently.

queue.add returns a promise that mimics the one passed in, meaning it will resolve or reject with the corresponding values.

If the functionality of the built-in Queue is not sufficient for you, you can use any other third-party, more functional solution.

React Native

Prepare

To be able to use @uploadcare/upload-client with React Native, you need to install react-native-url-polyfill.

To prevent Error: Cannot create URL for blob errors you need to configure your Android app schema to accept blobs - have a look at this pull request for an example: 5985d7e.

1. Add the following code to the application section of your AndroidManifest.xml:

<provider
  android:name="com.facebook.react.modules.blob.BlobProvider"
  android:authorities="@string/blob_provider_authority"
  android:exported="false"
/>

2. Add the following code to the android/app/src/main/res/values/strings.xml:

<resources>
  <string name="app_name">MY_REACT_NATIVE_APP_NAME</string>
  <string name="blob_provider_authority">com.detox.blob</string>
</resources>

Usage

You can use ReactNativeAsset as an input to the @uploadcare/upload-client like this:

type ReactNativeAsset = {
  uri: string
  type: string
  name?: string
}

const asset = { uri: 'URI_TO_FILE', name: 'file.txt', type: 'text/plain' }
uploadFile(asset, { publicKey: 'YOUR_PUBLIC_KEY' })

Or Blob like this:

const uri = 'URI_TO_FILE'
const blob = await fetch(uri).then((res) => res.blob())
uploadFile(blob, {
  publicKey: 'YOUR_PUBLIC_KEY',
  fileName: 'file.txt',
  contentType: 'text/plain'
})

Testing

npm run test

By default, tests runs with mock server, but you can run tests with production environment.

Run test on production servers:

npm run test:production

Run test with mock server (mock server starts automaticaly):

npm run test

Run mock server:

npm run mock:start

And then you can run test:

npm run test:jest

Security issues

If you think you ran into something in Uploadcare libraries that might have security implications, please hit us up at [email protected] or Hackerone.

We'll contact you personally in a short time to fix an issue through co-op and prior to any public disclosure.

Feedback

Issues and PRs are welcome. You can provide your feedback or drop us a support request at [email protected].