/
http.go
176 lines (158 loc) · 3.62 KB
/
http.go
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package main
import (
"crypto/tls"
"fmt"
"io/ioutil"
"net"
"net/http"
"net/url"
"strings"
"time"
"gopkg.in/yaml.v2"
)
func getDataSource() (dataSource DataSource, err error) {
httpTransport := &http.Transport{
Dial: (&net.Dialer{DualStack: true}).Dial,
TLSClientConfig: &tls.Config{InsecureSkipVerify: true},
}
httpClient := &http.Client{Transport: httpTransport, Timeout: 10 * time.Second}
var res *http.Response
var urlDataSource string
var buffer []byte
var ok bool
ok, urlDataSource = cmdlineVar("cloud-config-url")
if !ok {
return dataSource, fmt.Errorf("no datasource available")
}
var host string
var port string
u, _ := url.Parse(urlDataSource)
if strings.Index(u.Host, ":") > 0 {
host, port, _ = net.SplitHostPort(u.Host)
} else {
host = u.Host
}
if port == "" {
if u.Scheme == "https" {
port = "443"
} else {
port = "80"
}
}
addrs, err := net.LookupIP(host)
if err != nil {
return dataSource, err
}
for _, addr := range addrs {
if ipv4 && addr.To4() == nil {
continue
}
if ipv6 && addr.To4() != nil {
continue
}
req, _ := http.NewRequest("GET", urlDataSource, nil)
req.URL = u
req.URL.Host = net.JoinHostPort(addr.String(), port)
req.Host = host
res, err = httpClient.Do(req)
if err != nil || res.StatusCode != 200 {
if debug {
fmt.Printf("http: %s", err)
time.Sleep(10 * time.Second)
}
continue
}
defer res.Body.Close()
buffer, err = ioutil.ReadAll(res.Body)
if err != nil {
continue
}
err = yaml.Unmarshal(buffer, &dataSource)
if err != nil {
if debug {
fmt.Printf("http: %s", err)
time.Sleep(10 * time.Second)
}
continue
}
return dataSource, nil
}
return
}
func getCloudConfig(dataSource DataSource) (cloudConfig CloudConfig, err error) {
httpTransport := &http.Transport{
Dial: (&net.Dialer{DualStack: true}).Dial,
TLSClientConfig: &tls.Config{InsecureSkipVerify: true},
}
var metadataUrl string
var metadataUrls []string
httpClient := &http.Client{Transport: httpTransport, Timeout: 10 * time.Second}
var res *http.Response
var buffer []byte
var ok bool
if dataSource.Datasource.Ec2.MetadataUrls == nil {
ok, metadataUrl = cmdlineVar("cloud-config-url")
if !ok {
return cloudConfig, fmt.Errorf("no datasource available")
}
metadataUrls = append(metadataUrls, metadataUrl)
} else {
metadataUrls = dataSource.Datasource.Ec2.MetadataUrls
}
for _, metadataUrl := range metadataUrls {
var host string
var port string
u, _ := url.Parse(metadataUrl)
if strings.Index(u.Host, ":") > 0 {
host, port, _ = net.SplitHostPort(u.Host)
} else {
host = u.Host
}
if port == "" {
if u.Scheme == "https" {
port = "443"
} else {
port = "80"
}
}
addrs, err := net.LookupIP(host)
if err != nil {
return cloudConfig, err
}
for _, addr := range addrs {
if ipv4 && addr.To4() == nil {
continue
}
if ipv6 && addr.To4() != nil {
continue
}
req, _ := http.NewRequest("GET", metadataUrl, nil)
req.URL = u
req.URL.Host = net.JoinHostPort(addr.String(), port)
req.Host = host
res, err = httpClient.Do(req)
if err != nil || res.StatusCode != 200 {
if debug {
fmt.Printf("http %s", err)
time.Sleep(10 * time.Second)
}
continue
}
defer res.Body.Close()
buffer, err = ioutil.ReadAll(res.Body)
if err != nil {
continue
}
err = yaml.Unmarshal(buffer, &cloudConfig)
if err != nil {
if debug {
fmt.Printf("http %s", err)
time.Sleep(10 * time.Second)
}
continue
}
}
return cloudConfig, nil
}
return cloudConfig, fmt.Errorf("failed to get cloud-config")
}