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/
packngo.go
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/
packngo.go
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package packngo
import (
"bytes"
"context"
"crypto/x509"
"encoding/json"
"fmt"
"io"
"io/ioutil"
"log"
"net/http"
"net/http/httputil"
"net/url"
"os"
"regexp"
"strconv"
"strings"
"time"
"github.com/hashicorp/go-retryablehttp"
)
const (
packetTokenEnvVar = "PACKET_AUTH_TOKEN"
libraryVersion = "0.1.0"
baseURL = "https://api.packet.net/"
userAgent = "packngo/" + libraryVersion
mediaType = "application/json"
debugEnvVar = "PACKNGO_DEBUG"
headerRateLimit = "X-RateLimit-Limit"
headerRateRemaining = "X-RateLimit-Remaining"
headerRateReset = "X-RateLimit-Reset"
)
var redirectsErrorRe = regexp.MustCompile(`stopped after \d+ redirects\z`)
type GetOptions struct {
Includes []string
Excludes []string
}
// ListOptions specifies optional global API parameters
type ListOptions struct {
// for paginated result sets, page of results to retrieve
Page int `url:"page,omitempty"`
// for paginated result sets, the number of results to return per page
PerPage int `url:"per_page,omitempty"`
Includes []string
Excludes []string
}
func makeSureGetOptionsInclude(g *GetOptions, s string) *GetOptions {
if g == nil {
return &GetOptions{Includes: []string{s}}
}
if !contains(g.Includes, s) {
g.Includes = append(g.Includes, s)
}
return g
}
func makeSureListOptionsInclude(l *ListOptions, s string) *ListOptions {
if l == nil {
return &ListOptions{Includes: []string{s}}
}
if !contains(l.Includes, s) {
l.Includes = append(l.Includes, s)
}
return l
}
func createGetOptionsURL(g *GetOptions) (url string) {
if g == nil {
return ""
}
if len(g.Includes) != 0 {
url += fmt.Sprintf("include=%s", strings.Join(g.Includes, ","))
}
if len(g.Excludes) != 0 {
if url != "" {
url += "&"
}
url += fmt.Sprintf("exclude=%s", strings.Join(g.Excludes, ","))
}
return
}
func createListOptionsURL(l *ListOptions) (url string) {
if l == nil {
return ""
}
if len(l.Includes) != 0 {
url += fmt.Sprintf("include=%s", strings.Join(l.Includes, ","))
}
if len(l.Excludes) != 0 {
if url != "" {
url += "&"
}
url += fmt.Sprintf("exclude=%s", strings.Join(l.Excludes, ","))
}
if l.Page != 0 {
if url != "" {
url += "&"
}
url += fmt.Sprintf("page=%d", l.Page)
}
if l.PerPage != 0 {
if url != "" {
url += "&"
}
url += fmt.Sprintf("per_page=%d", l.PerPage)
}
return
}
// meta contains pagination information
type meta struct {
Self *Href `json:"self"`
First *Href `json:"first"`
Last *Href `json:"last"`
Previous *Href `json:"previous,omitempty"`
Next *Href `json:"next,omitempty"`
Total int `json:"total"`
CurrentPageNum int `json:"current_page"`
LastPageNum int `json:"last_page"`
}
// Response is the http response from api calls
type Response struct {
*http.Response
Rate
}
// Href is an API link
type Href struct {
Href string `json:"href"`
}
func (r *Response) populateRate() {
// parse the rate limit headers and populate Response.Rate
if limit := r.Header.Get(headerRateLimit); limit != "" {
r.Rate.RequestLimit, _ = strconv.Atoi(limit)
}
if remaining := r.Header.Get(headerRateRemaining); remaining != "" {
r.Rate.RequestsRemaining, _ = strconv.Atoi(remaining)
}
if reset := r.Header.Get(headerRateReset); reset != "" {
if v, _ := strconv.ParseInt(reset, 10, 64); v != 0 {
r.Rate.Reset = Timestamp{time.Unix(v, 0)}
}
}
}
// ErrorResponse is the http response used on errors
type ErrorResponse struct {
Response *http.Response
Errors []string `json:"errors"`
SingleError string `json:"error"`
}
func (r *ErrorResponse) Error() string {
return fmt.Sprintf("%v %v: %d %v %v",
r.Response.Request.Method, r.Response.Request.URL, r.Response.StatusCode, strings.Join(r.Errors, ", "), r.SingleError)
}
// Client is the base API Client
type Client struct {
client *retryablehttp.Client
debug bool
BaseURL *url.URL
UserAgent string
ConsumerToken string
APIKey string
RateLimit Rate
// Packet Api Objects
Plans PlanService
Users UserService
Emails EmailService
SSHKeys SSHKeyService
Devices DeviceService
Projects ProjectService
Facilities FacilityService
OperatingSystems OSService
DeviceIPs DeviceIPService
DevicePorts DevicePortService
ProjectIPs ProjectIPService
ProjectVirtualNetworks ProjectVirtualNetworkService
Volumes VolumeService
VolumeAttachments VolumeAttachmentService
SpotMarket SpotMarketService
SpotMarketRequests SpotMarketRequestService
Organizations OrganizationService
BGPSessions BGPSessionService
BGPConfig BGPConfigService
CapacityService CapacityService
Batches BatchService
TwoFactorAuth TwoFactorAuthService
VPN VPNService
HardwareReservations HardwareReservationService
Events EventService
Notifications NotificationService
}
// NewRequest inits a new http request with the proper headers
func (c *Client) NewRequest(method, path string, body interface{}) (*retryablehttp.Request, error) {
// relative path to append to the endpoint url, no leading slash please
rel, err := url.Parse(path)
if err != nil {
return nil, err
}
u := c.BaseURL.ResolveReference(rel)
// json encode the request body, if any
buf := new(bytes.Buffer)
if body != nil {
err := json.NewEncoder(buf).Encode(body)
if err != nil {
return nil, err
}
}
req, err := retryablehttp.NewRequest(method, u.String(), buf)
if err != nil {
return nil, err
}
req.Close = true
req.Header.Add("X-Auth-Token", c.APIKey)
req.Header.Add("X-Consumer-Token", c.ConsumerToken)
req.Header.Add("Content-Type", mediaType)
req.Header.Add("Accept", mediaType)
req.Header.Add("User-Agent", userAgent)
return req, nil
}
// Do executes the http request
func (c *Client) Do(req *retryablehttp.Request, v interface{}) (*Response, error) {
resp, err := c.client.Do(req)
if err != nil {
return nil, err
}
defer resp.Body.Close()
response := Response{Response: resp}
response.populateRate()
if c.debug {
o, _ := httputil.DumpResponse(response.Response, true)
log.Printf("\n=======[RESPONSE]============\n%s\n\n", string(o))
}
c.RateLimit = response.Rate
err = checkResponse(resp)
// if the response is an error, return the ErrorResponse
if err != nil {
return &response, err
}
if v != nil {
// if v implements the io.Writer interface, return the raw response
if w, ok := v.(io.Writer); ok {
io.Copy(w, resp.Body)
} else {
err = json.NewDecoder(resp.Body).Decode(v)
if err != nil {
return &response, err
}
}
}
return &response, err
}
func dumpRequest(req *retryablehttp.Request) {
o, _ := httputil.DumpRequestOut(req.Request, false)
strReq := string(o)
reg, _ := regexp.Compile(`X-Auth-Token: (\w*)`)
reMatches := reg.FindStringSubmatch(strReq)
if len(reMatches) == 2 {
strReq = strings.Replace(strReq, reMatches[1], strings.Repeat("-", len(reMatches[1])), 1)
}
bbs, _ := req.BodyBytes()
log.Printf("\n=======[REQUEST]=============\n%s%s\n", strReq, string(bbs))
}
// DoRequest is a convenience method, it calls NewRequest followed by Do
// v is the interface to unmarshal the response JSON into
func (c *Client) DoRequest(method, path string, body, v interface{}) (*Response, error) {
req, err := c.NewRequest(method, path, body)
if c.debug {
dumpRequest(req)
}
if err != nil {
return nil, err
}
return c.Do(req, v)
}
// DoRequestWithHeader same as DoRequest
func (c *Client) DoRequestWithHeader(method string, headers map[string]string, path string, body, v interface{}) (*Response, error) {
req, err := c.NewRequest(method, path, body)
for k, v := range headers {
req.Header.Add(k, v)
}
if c.debug {
dumpRequest(req)
}
if err != nil {
return nil, err
}
return c.Do(req, v)
}
// NewClient initializes and returns a Client
func NewClient() (*Client, error) {
apiToken := os.Getenv(packetTokenEnvVar)
if apiToken == "" {
return nil, fmt.Errorf("you must export %s", packetTokenEnvVar)
}
c := NewClientWithAuth("packngo lib", apiToken, nil)
return c, nil
}
// NewClientWithAuth initializes and returns a Client, use this to get an API Client to operate on
// N.B.: Packet's API certificate requires Go 1.5+ to successfully parse. If you are using
// an older version of Go, pass in a custom http.Client with a custom TLS configuration
// that sets "InsecureSkipVerify" to "true"
func NewClientWithAuth(consumerToken string, apiKey string, httpClient *retryablehttp.Client) *Client {
client, _ := NewClientWithBaseURL(consumerToken, apiKey, httpClient, baseURL)
return client
}
func PacketRetryPolicy(ctx context.Context, resp *http.Response, err error) (bool, error) {
// do not retry on context.Canceled or context.DeadlineExceeded
if ctx.Err() != nil {
return false, ctx.Err()
}
if err != nil {
if v, ok := err.(*url.Error); ok {
// Don't retry if the error was due to too many redirects.
if redirectsErrorRe.MatchString(v.Error()) {
return false, nil
}
// Don't retry if the error was due to TLS cert verification failure.
if _, ok := v.Err.(x509.UnknownAuthorityError); ok {
return false, nil
}
}
// The error is likely recoverable so retry.
return true, nil
}
// Check the response code. We retry on 500-range responses to allow
// the server time to recover, as 500's are typically not permanent
// errors and may relate to outages on the server side. This will catch
// invalid response codes as well, like 0 and 999.
//if resp.StatusCode == 0 || (resp.StatusCode >= 500 && resp.StatusCode != 501) {
// return true, nil
//}
return false, nil
}
// NewClientWithBaseURL returns a Client pointing to nonstandard API URL, e.g.
// for mocking the remote API
func NewClientWithBaseURL(consumerToken string, apiKey string, httpClient *retryablehttp.Client, apiBaseURL string) (*Client, error) {
if httpClient == nil {
// Don't fall back on http.DefaultClient as it's not nice to adjust state
// implicitly. If the client wants to use http.DefaultClient, they can
// pass it in explicitly.
httpClient = retryablehttp.NewClient()
httpClient.RetryWaitMin = time.Second
httpClient.RetryWaitMax = 30 * time.Second
httpClient.RetryMax = 10
httpClient.CheckRetry = PacketRetryPolicy
}
u, err := url.Parse(apiBaseURL)
if err != nil {
return nil, err
}
c := &Client{client: httpClient, BaseURL: u, UserAgent: userAgent, ConsumerToken: consumerToken, APIKey: apiKey}
c.debug = os.Getenv(debugEnvVar) != ""
c.Plans = &PlanServiceOp{client: c}
c.Organizations = &OrganizationServiceOp{client: c}
c.Users = &UserServiceOp{client: c}
c.Emails = &EmailServiceOp{client: c}
c.SSHKeys = &SSHKeyServiceOp{client: c}
c.Devices = &DeviceServiceOp{client: c}
c.Projects = &ProjectServiceOp{client: c}
c.Facilities = &FacilityServiceOp{client: c}
c.OperatingSystems = &OSServiceOp{client: c}
c.DeviceIPs = &DeviceIPServiceOp{client: c}
c.DevicePorts = &DevicePortServiceOp{client: c}
c.ProjectVirtualNetworks = &ProjectVirtualNetworkServiceOp{client: c}
c.ProjectIPs = &ProjectIPServiceOp{client: c}
c.Volumes = &VolumeServiceOp{client: c}
c.VolumeAttachments = &VolumeAttachmentServiceOp{client: c}
c.SpotMarket = &SpotMarketServiceOp{client: c}
c.BGPSessions = &BGPSessionServiceOp{client: c}
c.BGPConfig = &BGPConfigServiceOp{client: c}
c.CapacityService = &CapacityServiceOp{client: c}
c.Batches = &BatchServiceOp{client: c}
c.TwoFactorAuth = &TwoFactorAuthServiceOp{client: c}
c.VPN = &VPNServiceOp{client: c}
c.HardwareReservations = &HardwareReservationServiceOp{client: c}
c.SpotMarketRequests = &SpotMarketRequestServiceOp{client: c}
c.Events = &EventServiceOp{client: c}
c.Notifications = &NotificationServiceOp{client: c}
return c, nil
}
func checkResponse(r *http.Response) error {
// return if http status code is within 200 range
if c := r.StatusCode; c >= 200 && c <= 299 {
// response is good, return
return nil
}
errorResponse := &ErrorResponse{Response: r}
data, err := ioutil.ReadAll(r.Body)
// if the response has a body, populate the message in errorResponse
if err == nil && len(data) > 0 {
json.Unmarshal(data, errorResponse)
}
return errorResponse
}