# AWS SDK v3 Proxy

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> A wrapper for adding proxy support to [AWS SDK v3](https://github.com/aws/aws-sdk-js-v3) clients

This wrapper adds a proxy configuration to AWS SDK clients by checking environment
variables and attaching the necessary request handler. By default, an error will
be thrown if no proxy is found in `process.env`, but also has options to not throw
which can be useful when developing other node utilities using this library.

**Note:** `http_proxy` and `HTTP_PROXY` take precedence over `https_proxy` and `HTTPS_PROXY`.
If you would like to change this behavior it can be specified in the [options](#options).

## Install

```bash
npm install aws-sdk-v3-proxy
```

## Usage

### HTTP Proxy

```ts
// process.env.HTTP_PROXY = 'http://127.0.0.1'
import { S3Client } from '@aws-sdk/client-s3';
import { addProxyToClient } from 'aws-sdk-v3-proxy';

const client = addProxyToClient(new S3Client({}));
// `client` now has HTTP proxy config at 'http://127.0.0.1'
```

or

```ts
import { S3Client } from '@aws-sdk/client-s3';
import { addProxyToClient } from 'aws-sdk-v3-proxy';

const client = addProxyToClient(new S3Client({}), {
  httpProxy: 'http://127.0.0.1',
});
// `client` now has HTTP proxy config at 'http://127.0.0.1'
```

### HTTPS Proxy

```ts
// process.env.HTTPS_PROXY = 'https://127.0.0.1'
import { S3Client } from '@aws-sdk/client-s3';
import { addProxyToClient } from 'aws-sdk-v3-proxy';

const client = addProxyToClient(new S3Client({}));
// `client` now has HTTPS proxy config at 'https://127.0.0.1'
```

or

```ts
import { S3Client } from '@aws-sdk/client-s3';
import { addProxyToClient } from 'aws-sdk-v3-proxy';

const client = addProxyToClient(new S3Client({}), {
  httpsProxy: 'https://127.0.0.1',
});
// `client` now has HTTPS proxy config at 'https://127.0.0.1'
```

### No Proxy with exception disabled

```ts
// process.env.HTTPS_PROXY = undefined
// process.env.HTTP_PROXY = undefined
import { S3Client } from '@aws-sdk/client-s3';
import { addProxyToClient } from 'aws-sdk-v3-proxy';

const client = addProxyToClient(new S3Client({}), { throwOnNoProxy: false });
// `client` has no proxy assigned and no error thrown
```

### Proxy with certs in header

```ts
// process.env.HTTPS_PROXY = 'https://127.0.0.1'
import { readFileSync } from 'fs';
import { S3Client } from '@aws-sdk/client-s3';
import { addProxyToClient } from 'aws-sdk-v3-proxy';

const client = addProxyToClient(new S3Client({}), {
  agentOptions: {
    ca: [readFileSync('custom-proxy-cert.pem').toString()],
  },
});

// `client` now has HTTPS proxy config at 'https://127.0.0.1' with ca `custom-proxy-cert.pem`
```

## API

### addProxyToClient(client, options?)

#### client

Type: `Object`

Any client from [@aws-sdk](https://github.com/aws/aws-sdk-js-v3).

#### options

Type: `object`

##### throwOnNoProxy

Type: `boolean`
Default: `true`

Throw an error if no proxy is found in the environment.

##### httpsOnly

Type: `boolean`
Default: `false`

Can be specified in cases where you have both http_proxy and https_proxy set, and would like to override the default behavior of the http_proxy taking precedence.

##### debug

Type: `boolean`
Default: `false`

Toggles additional logging for debugging.

##### httpProxy

Type: `string`

The URL for the HTTP proxy server.
If not specified, the value of `process.env.http_proxy` or `process.env.HTTP_RPOXY` will be used.

##### httpsProxy

The URL for the HTTPS proxy server.
If not specified, the value of `process.env.https_proxy` or `process.env.HTTPS_RPOXY` will be used.

##### agentOptions

Type: `HttpsProxyAgentOptions`

Used to pass specific options to the proxy agent.

## Security

See [CONTRIBUTING](CONTRIBUTING.md#security-issue-notifications) for more information.

## License

This project is licensed under the Apache-2.0 License.

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