package plugins

import (

"bytes"

"encoding/json"

"fmt"

"io/ioutil"

"net/http"

"net/url"

"strings"

"github.com/docker/docker/utils"

)

const (

versionMimetype = "appplication/vnd.docker.plugins.v1+json"

)

func NewClient(addr string) *Client {

// No TLS. Hopefully this discourages non-local plugins

tr := &http.Transport{}

protoAndAddr := strings.Split(addr, "://")

utils.ConfigureTCPTransport(tr, protoAndAddr[0], protoAndAddr[1])

return &Client{&http.Client{Transport: tr}, addr}

}

type Client struct {

http *http.Client

addr string

}

func (c *Client) Call(serviceMethod string, args interface{}, ret interface{}) error {

u, _ := url.Parse(c.addr)

u.Path = serviceMethod

var buf bytes.Buffer

if err := json.NewEncoder(&buf).Encode(args); err != nil {

return err

}

req, err := http.NewRequest("POST", u.String(), &buf)

req.Header.Add("Accept", versionMimetype)

resp, err := c.http.Do(req)

if err != nil {

return err

}

if resp.StatusCode != http.StatusOK {

remoteErr, err := ioutil.ReadAll(resp.Body)

if err != nil {

return nil

}

return fmt.Errorf("Plugin Error: %v", remoteErr)

}

if err := json.NewDecoder(resp.Body).Decode(&ret); err != nil {

return err

}

return nil

}