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https://github.com/jwerle/hypersource-client

Simple client to talk to HyperSource endpoints
https://github.com/jwerle/hypersource-client

client hypercore hypersource

Last synced: 28 days ago
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Simple client to talk to HyperSource endpoints

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README 

        
hypersource-client

==================



Simple client to talk to HyperSource endpoints



## Installation



```sh

$ npm install hypersource-client

```



## Usage



The hypersource client can be used from the command line are directly in

module code.



### Command Line



The following will send an input `hyper{core,drive,db,trie}` or `DAT`

archive to an point and output the response into `output-directory/`.



```sh

$ hsurl ws://endpoint.com -i /path/to/hyper{core,drive,db,trie} -o output-directory

```



### Programmatic



```js

const hypercore = require('hypercore')

const hsurl = require('hypersource-client')

const ram = require('random-access-memory')



const host = `ws://domain.com`

const req = hypercore(ram, key, opts)

const client = hsurl(req, host).connnect(onconnect)



// append buffer to request feed

req.append('hello')



function onconnect(err, res) {

  res.head(console.log)

}

```



## Example



Below is an example of a

[hypersource](https://github.com/jwerle/hypersource) server that echos

a [hyperdrive](https://github.com/mafintosh/hyperdrive) back to the

client and the exits.



```js

const hypersource = require('hypersource')

const hyperdrive = require('hyperdrive')

const mirror = require('mirror-folder')

const hsurl = require('hypersource-client')

const pump = require('pump')

const path = require('path')

const ram = require('random-access-memory')



const bundle = hyperdrive(ram)

const server = hypersource(onrequest)



server.listen(3000, onlistening)



function onrequest(req, res) {

  const source = hyperdrive(ram, req.key, req)

  const echo = hyperdrive(ram, res.key, res)



  source.replicate(req).once('handshake', onhandshake)



  function onhandshake() {

    source.once('update', onupdate)

  }



  function onupdate() {

    const src = { fs: source, name: '/' }

    const dst = { fs: echo, name: '/' }

    mirror(src, dst, onmirror)

  }



  function onmirror(err) {

    if (err) {

      console.error('ERR', err)

      res.close()

    } else {

      echo.replicate(res)

    }

  }

}



function onlistening(err) {

  if (err) {

    throw err

  }



  bundle.ready(() => {

    bundle.writeFile('hello.txt', 'hello world', onwrite)

  })

}



function onwrite(err) {

  if (err) {

    throw err

  }



  const client = hsurl(bundle, 'ws://localhost:3000')

  client.connect(onconnect)

}



function onconnect(err, res, req, socket) {

  if (err) {

    console.error('ERR', err)

  } else {

    res.once('update', () => {

      const index = res.createReadStream('hello.txt')



      index.on('error', (err) => {

        console.error('ERR', err)

      })



      index.on('end', () => {

        server.close()

        process.nextTick(process.exit, 0)

      })



      index.pipe(process.stdout)

    })

  }

}

```



## API



### `client = require('hypersource-client')(hyperObject, opts)`



Create a client request with a hypercore or `hyper*` like object (`hypercore`,

`hyperdrive`, `hypertrie`, `hyperdb`, etc...) where `opts` can be a

`string` that represents the WebSocket endpoint to connect to or an

object that may look like:



```js



{

  endpoint: String, // the WebSocket endpoint to connect to (eg: ws://domain.com

  timeout: Number, // A timeout in milliseconds for the underlying hypercore protocol stream. Defaults to '30000'

  discovery: Object | Boolean, // Options passed directly to 'hyperdiscovery'. Set to 'false' to disable

}

```



```js

const client = require('hypersource-client')(feed, 'wss://domain.com')

```



#### DAT Network



The client will join the DAT network for a given `hyper*` object and

attempt to replicate it with the network. This is useful if the input

request `hyper*` object lives somewhere else.



#### `client.connect(callback)`



Connect to WebSocket server and send request calling

`callback(err, res, req, socket)` upon success or failure where:



* `err` is a possible error that could have occurred while connecting.

  (Default: `null`)

* `res` is a `hyper*` like object that is equivalent in type to the

  input `hyper*` object. If you give the client a `hypercore`, you get

  back a `hypercore` as a response object. The same can be said about

  `hyperdrive`, etc

* `req` is the input `hyper*` object given as request input

* `socket` is the underlying WebSocket backing this connection



```js

client.connect((err, res) => {

  if (err) {

    // handle error

  } else {

    res.update(() => { // asumes hypercore given

      res.head(console.log)

    })

  }

})

```



#### `client.close(callback)`



Closes the client and the underlying resources.



```js

client.close((err) => {

  if (err) {

    // handle error while closing client

  }

})

```



#### `client.destroy([err])`



Destroys the client with an optional `err`.



#### `client.on('error', err)`



Emitted when an error occurs.



#### `client.on('peer', peer)`



Emitted when a peer is discovered from

[hyperdiscovery](https://github.com/karissa/hyperdiscovery).



## Command Line API



```

usage: hsurl [-hDV] [options] 

where options can be:



  -i, --input     Path to storage for input feed

  -o, --output    Path to storage for output feed

  -f, --force     Force actions like overwriting a file or directory

  -k, --key       Public key for storage feed

  -t, --type      The feed type (eg: hypercore|hyperdrive|hypertrie...) (Default: 'hypercore')

  -h, --help      Show this message

  -D, --debug     Enable debug output (DEBUG="hypersource-client")

  -V, --version   Show program version

      --sparse    Treat input as sparse input

      --latest    Treat input (and output) latest (only for hyperdrive|DAT)

      --stdin     Read request from stdin

      --stdout    Output response to stdout

      --encoding  Set input encoding (--stdout) (Default: 'binary')

      --utf8      Alias for '--enoding=utf8'



```



## License



MIT