/
client.go
193 lines (166 loc) · 3.89 KB
/
client.go
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package pushr
import (
"bufio"
"encoding/json"
"errors"
"github.com/blang/semver"
"io"
"net/http"
"os"
"sort"
"strings"
)
type Client struct {
host string
readToken string
writeToken string
}
func NewClient(host, readToken string, writeToken string) *Client {
return &Client{
host: host,
readToken: readToken,
writeToken: writeToken,
}
}
type Release struct {
Versions map[string]*Version `json:"versions"`
}
func NewRelease() *Release {
return &Release{
Versions: make(map[string]*Version),
}
}
type Version struct {
ContentType string `json:"contenttype"`
Size int64 `json:"size"`
Filename string `json:"filename"`
}
type ByVersion []semver.Version
func (a ByVersion) Len() int {
return len(a)
}
func (a ByVersion) Swap(i, j int) {
a[i], a[j] = a[j], a[i]
}
func (a ByVersion) Less(i, j int) bool {
return a[i].LT(a[j])
}
func NewVersion() *Version {
return &Version{}
}
func (c *Client) Release(release string) (*Release, error) {
req, err := http.NewRequest("GET", c.cleanHost()+"/releases/"+release, nil)
if err != nil {
return nil, err
}
req.Header.Set("X-PUSHR-TOKEN", c.readToken)
req.Header.Set("Accept", "application/json")
client := &http.Client{}
binresp, err := client.Do(req)
if err != nil {
return nil, err
}
defer binresp.Body.Close()
r := bufio.NewReader(binresp.Body)
var rel Release
err = json.NewDecoder(r).Decode(&rel)
if err != nil {
return nil, err
}
return &rel, nil
}
func (c *Client) LatestVersion(release string, channel string) (*Version, string, error) {
r, err := c.Release(release)
if err != nil {
return nil, "", err
}
if channel == "" {
channel = "stable"
}
versions := make([]semver.Version, 0, len(r.Versions))
for versionStr := range r.Versions {
v, err := semver.New(versionStr)
if err == nil {
versions = append(versions, v)
}
}
sort.Sort(ByVersion(versions))
for i := len(versions) - 1; i >= 0; i-- {
v := versions[i]
if channel == "stable" {
if len(v.Pre) == 0 {
return r.Versions[v.String()], v.String(), nil
}
} else {
// Accept stable release if it's the latest version, otherwise search for specific channel
if len(v.Pre) == 0 || (len(v.Pre) > 0 && v.Pre[0].String() == channel) {
return r.Versions[v.String()], v.String(), nil
}
}
}
return nil, "", errors.New("No version in this channel available")
}
func (c *Client) Version(release string, versionstr string) (*Version, error) {
req, err := http.NewRequest("GET", c.cleanHost()+"/releases/"+release+"/"+versionstr, nil)
if err != nil {
return nil, err
}
req.Header.Set("X-PUSHR-TOKEN", c.readToken)
req.Header.Set("Accept", "application/json")
client := &http.Client{}
binresp, err := client.Do(req)
if err != nil {
return nil, err
}
defer binresp.Body.Close()
r := bufio.NewReader(binresp.Body)
var version Version
err = json.NewDecoder(r).Decode(&version)
if err != nil {
return nil, err
}
return &version, nil
}
func (c *Client) Download(release string, versionstr string, filename string) error {
req, err := http.NewRequest("GET", c.cleanHost()+"/releases/"+release+"/"+versionstr, nil)
if err != nil {
return err
}
req.Header.Set("X-PUSHR-TOKEN", c.readToken)
req.Header.Set("Accept", "application/octet-stream")
client := &http.Client{}
binresp, err := client.Do(req)
if err != nil {
return err
}
defer binresp.Body.Close()
r := bufio.NewReader(binresp.Body)
f, err := os.OpenFile(filename, os.O_RDWR|os.O_CREATE, 0666)
if err != nil {
return err
}
defer f.Close()
w := bufio.NewWriter(f)
buf := make([]byte, 1024)
for {
// read a chunk
n, err := r.Read(buf)
if err != nil && err != io.EOF {
return err
}
if n == 0 {
break
}
// write a chunk
if _, err := w.Write(buf[:n]); err != nil {
return err
}
}
if err = w.Flush(); err != nil {
return err
}
return nil
}
func (c *Client) cleanHost() string {
return strings.TrimSuffix(c.host, "/")
}