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proxmox.go
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proxmox.go
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package proxmox
import (
"bytes"
"context"
"crypto/tls"
"encoding/json"
"errors"
"fmt"
"io"
"mime/multipart"
"net/http"
"os"
"path/filepath"
"strings"
"time"
"github.com/buger/goterm"
"github.com/gorilla/websocket"
)
const (
DefaultUserAgent = "go-proxmox/dev"
TagFormat = "go-proxmox+%s"
)
var ErrNotAuthorized = errors.New("not authorized to access endpoint")
func IsNotAuthorized(err error) bool {
return errors.Is(err, ErrNotAuthorized)
}
var ErrTimeout = errors.New("the operation has timed out")
func IsTimeout(err error) bool {
return errors.Is(err, ErrTimeout)
}
var ErrNotFound = errors.New("unable to find the item you are looking for")
func IsNotFound(err error) bool {
return errors.Is(err, ErrNotFound)
}
var ErrNoop = errors.New("nothing to do")
func IsErrNoop(err error) bool {
return errors.Is(err, ErrNoop)
}
func MakeTag(v string) string {
return fmt.Sprintf(TagFormat, v)
}
type Client struct {
httpClient *http.Client
userAgent string
baseURL string
token string
credentials *Credentials
version *Version
session *Session
log LeveledLoggerInterface
}
func NewClient(baseURL string, opts ...Option) *Client {
c := &Client{
baseURL: baseURL,
userAgent: DefaultUserAgent,
log: &LeveledLogger{Level: LevelError},
}
for _, o := range opts {
o(c)
}
if c.httpClient == nil {
c.httpClient = http.DefaultClient
}
return c
}
func (c *Client) Version(ctx context.Context) (*Version, error) {
return c.version, c.Get(ctx, "/version", &c.version)
}
func (c *Client) Req(ctx context.Context, method, path string, data []byte, v interface{}) error {
if strings.HasPrefix(path, "/") {
path = c.baseURL + path
}
c.log.Debugf("SEND: %s - %s", method, path)
var body io.Reader
if data != nil {
if path != (c.baseURL + "/access/ticket") {
// don't show passwords in the logs
if len(data) < 2048 {
c.log.Debugf("DATA: %s", string(data))
} else {
c.log.Debugf("DATA: %s", "truncated due to length")
}
}
body = bytes.NewBuffer(data)
}
req, err := http.NewRequestWithContext(ctx, method, path, body)
if err != nil {
return err
}
if body != nil {
req.Header.Add("Content-Type", "application/json")
}
c.authHeaders(&req.Header)
res, err := c.httpClient.Do(req)
if err != nil {
return err
}
defer func() { _ = res.Body.Close() }()
if res.StatusCode == http.StatusUnauthorized || res.StatusCode == http.StatusForbidden {
if path == (c.baseURL + "/access/ticket") {
// received an unauthorized while trying to create a session
return ErrNotAuthorized
}
if c.credentials != nil && c.session == nil {
// credentials passed but no session started, try a login and retry the request
if _, err = c.Ticket(ctx, c.credentials); err != nil {
return err
}
return c.Req(ctx, method, path, data, v)
}
return ErrNotAuthorized
}
return c.handleResponse(res, v)
}
func (c *Client) Get(ctx context.Context, p string, v interface{}) error {
return c.Req(ctx, http.MethodGet, p, nil, v)
}
func (c *Client) Post(ctx context.Context, p string, d interface{}, v interface{}) error {
var data []byte
if d != nil {
var err error
data, err = json.Marshal(d)
if err != nil {
return err
}
}
return c.Req(ctx, http.MethodPost, p, data, v)
}
func (c *Client) Put(ctx context.Context, p string, d interface{}, v interface{}) error {
var data []byte
if d != nil {
var err error
data, err = json.Marshal(d)
if err != nil {
return err
}
}
return c.Req(ctx, http.MethodPut, p, data, v)
}
func (c *Client) Delete(ctx context.Context, p string, v interface{}) error {
return c.Req(ctx, http.MethodDelete, p, nil, v)
}
// Upload - There is some weird 16kb limit hardcoded in proxmox for the max POST size, hopefully in the future we make
// a func to scp the file to the node directly as this API endpoint is kind of janky. For now big ISOs/vztmpl should
// be put somewhere and a use DownloadUrl. code link for posterity, I think they meant to do 16mb and got the bit math wrong
// https://git.proxmox.com/?p=pve-manager.git;a=blob;f=PVE/HTTPServer.pm;h=8a0c308ea6d6601b886b0dec2bada3d4c3da65d0;hb=HEAD#l36
// the task returned is the imgcopy from the tmp file to where the node actually wants the iso and you should wait for that
// to complete before using the iso
func (c *Client) Upload(path string, fields map[string]string, file *os.File, v interface{}) error {
if strings.HasPrefix(path, "/") {
path = c.baseURL + path
}
var b bytes.Buffer
w := multipart.NewWriter(&b)
for name, val := range fields {
if err := w.WriteField(name, val); err != nil {
return err
}
}
if _, err := w.CreateFormFile("filename", filepath.Base(file.Name())); err != nil {
return err
}
header := b.Len()
if err := w.Close(); err != nil {
return err
}
body := io.MultiReader(bytes.NewReader(b.Bytes()[:header]),
file,
bytes.NewReader(b.Bytes()[header:]))
req, err := http.NewRequest(http.MethodPost, path, body)
if err != nil {
return err
}
fi, err := file.Stat()
if err != nil {
return err
}
req.Header.Set("Content-Type", w.FormDataContentType())
req.ContentLength = int64(b.Len()) + fi.Size()
c.authHeaders(&req.Header)
res, err := c.httpClient.Do(req)
if err != nil {
return err
}
defer func() { _ = res.Body.Close() }()
return c.handleResponse(res, &v)
}
func (c *Client) authHeaders(header *http.Header) {
header.Add("User-Agent", c.userAgent)
header.Add("Accept", "application/json")
if c.token != "" {
header.Add("Authorization", "PVEAPIToken="+c.token)
} else if c.session != nil {
header.Add("Cookie", "PVEAuthCookie="+c.session.Ticket)
header.Add("CSRFPreventionToken", c.session.CSRFPreventionToken)
}
}
func (c *Client) handleResponse(res *http.Response, v interface{}) error {
if res.StatusCode == http.StatusInternalServerError ||
res.StatusCode == http.StatusNotImplemented {
return errors.New(res.Status)
}
body, err := io.ReadAll(res.Body)
if err != nil {
return err
}
c.log.Debugf("RECV: %d - %s", res.StatusCode, res.Status)
if res.Request != nil && res.Request.URL != nil {
if res.Request.URL.String() != (c.baseURL + "/access/ticket") {
// don't show tokens out of the logs
c.log.Debugf("BODY: %s", string(body))
}
}
if res.StatusCode == http.StatusBadRequest {
var errorskey map[string]json.RawMessage
if err := json.Unmarshal(body, &errorskey); err != nil {
return err
}
if body, ok := errorskey["errors"]; ok {
return fmt.Errorf("bad request: %s - %s", res.Status, body)
}
return fmt.Errorf("bad request: %s - %s", res.Status, string(body))
}
// if nil passed don't bother to do any unmarshalling
if nil == v {
return nil
}
// account for everything being in a data key
var datakey map[string]json.RawMessage
if err := json.Unmarshal(body, &datakey); err != nil {
return err
}
if body, ok := datakey["data"]; ok {
return json.Unmarshal(body, &v)
}
return json.Unmarshal(body, &v) // assume passed in type fully supports response
}
func (c *Client) VNCWebSocket(path string, vnc *VNC) (chan string, chan string, chan error, func() error, error) {
if strings.HasPrefix(path, "/") {
path = strings.Replace(c.baseURL, "https://", "wss://", 1) + path
}
var tlsConfig *tls.Config
transport := c.httpClient.Transport.(*http.Transport)
if transport != nil {
tlsConfig = transport.TLSClientConfig
}
c.log.Debugf("connecting to websocket: %s", path)
dialer := &websocket.Dialer{
Proxy: http.ProxyFromEnvironment,
HandshakeTimeout: 30 * time.Second,
TLSClientConfig: tlsConfig,
}
dialerHeaders := http.Header{}
c.authHeaders(&dialerHeaders)
conn, _, err := dialer.Dial(path, dialerHeaders)
if err != nil {
return nil, nil, nil, nil, err
}
// start the session by sending user@realm:ticket
if err := conn.WriteMessage(websocket.BinaryMessage, []byte(vnc.User+":"+vnc.Ticket+"\n")); err != nil {
return nil, nil, nil, nil, err
}
// it sends back the same thing you just sent so catch it drop it
_, msg, err := conn.ReadMessage()
if err != nil || string(msg) != "OK" {
if err := conn.Close(); err != nil {
return nil, nil, nil, nil, fmt.Errorf("error closing websocket: %s", err.Error())
}
return nil, nil, nil, nil, fmt.Errorf("unable to establish websocket: %s", err.Error())
}
type size struct {
height int
width int
}
// start the session by sending user@realm:ticket
tsize := size{
height: goterm.Height(),
width: goterm.Width(),
}
c.log.Debugf("sending terminal size: %d x %d", tsize.height, tsize.width)
if err := conn.WriteMessage(websocket.BinaryMessage, []byte(fmt.Sprintf("1:%d:%d:", tsize.height, tsize.width))); err != nil {
return nil, nil, nil, nil, err
}
send := make(chan string)
recv := make(chan string)
errs := make(chan error)
done := make(chan struct{})
ticker := time.NewTicker(30 * time.Second)
resize := make(chan size)
go func(tsize size) {
ticker := time.NewTicker(1 * time.Second)
defer ticker.Stop()
for {
select {
case <-done:
return
case <-ticker.C:
resized := size{
height: goterm.Height(),
width: goterm.Width(),
}
if tsize.height != resized.height ||
tsize.width != resized.width {
tsize = resized
resize <- resized
}
}
}
}(tsize)
closer := func() error {
close(done)
time.Sleep(1 * time.Second)
close(send)
close(recv)
close(errs)
ticker.Stop()
return conn.Close()
}
go func() {
for {
select {
case <-done:
return
default:
_, msg, err := conn.ReadMessage()
if err != nil {
if strings.Contains(err.Error(), "use of closed network connection") {
return
}
if !websocket.IsUnexpectedCloseError(err, websocket.CloseGoingAway, websocket.CloseAbnormalClosure) {
return
}
errs <- err
}
recv <- string(msg)
}
}
}()
go func() {
for {
select {
case <-done:
if err := conn.WriteMessage(websocket.CloseMessage, []byte{}); err != nil {
errs <- err
}
return
case <-ticker.C:
c.log.Debugf("sending wss keep alive")
if err := conn.WriteMessage(websocket.BinaryMessage, []byte("2")); err != nil {
errs <- err
}
case resized := <-resize:
c.log.Debugf("resizing terminal window: %d x %d", resized.height, resized.width)
if err := conn.WriteMessage(websocket.BinaryMessage, []byte(fmt.Sprintf("1:%d:%d:", resized.height, resized.width))); err != nil {
errs <- err
}
case msg := <-send:
c.log.Debugf("sending: %s", msg)
m := []byte(msg)
send := append([]byte(fmt.Sprintf("0:%d:", len(m))), m...)
if err := conn.WriteMessage(websocket.BinaryMessage, send); err != nil {
errs <- err
}
if err := conn.WriteMessage(websocket.BinaryMessage, []byte("0:1:\n")); err != nil {
errs <- err
}
}
}
}()
return send, recv, errs, closer, nil
}