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client.go
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client.go
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package ddns5libdns
import (
"context"
"fmt"
"io/ioutil"
"net/http"
"net/url"
"strings"
"github.com/libdns/libdns"
"github.com/miekg/dns"
)
func (p *Provider) getDomain(ctx context.Context, zone string) ([]libdns.Record, error) {
p.mutex.Lock()
defer p.mutex.Unlock()
// we trim the dot at the end of the zone name to get the fqdn
// and then use it to fetch domain information through the api
fqdn := strings.TrimRight(zone, ".")
var libRecords []libdns.Record
// fetch the details for the domain
result, err := p.doRequest(ctx, fqdn, map[string]string{"verbose": "true"})
if err != nil {
return libRecords, err
}
// append the A and AAAA records which we should have (may be blank)
if result[1] != "" {
libRecords = append(libRecords, libdns.Record{
Type: "A",
Name: fqdn,
Value: result[1],
})
}
if result[2] != "" {
libRecords = append(libRecords, libdns.Record{
Type: "AAAA",
Name: fqdn,
Value: result[2],
})
}
return libRecords, nil
}
func (p *Provider) setRecord(ctx context.Context, zone string, record libdns.Record, clear bool) error {
p.mutex.Lock()
defer p.mutex.Unlock()
// sanitize the domain, combines the zone and record names
// the record name should typically be relative to the zone
domain := libdns.AbsoluteName(record.Name, zone)
params := map[string]string{"verbose": "true"}
switch record.Type {
case "TXT":
params["txt"] = record.Value
case "A":
params["ip"] = record.Value
case "AAAA":
params["ipv6"] = record.Value
default:
return fmt.Errorf("unsupported record type: %s", record.Type)
}
if clear {
params["clear"] = "true"
}
// make the request to duckdns to set the records according to the params
_, err := p.doRequest(ctx, domain, params)
if err != nil {
return err
}
return nil
}
func (p *Provider) doRequest(ctx context.Context, domain string, params map[string]string) ([]string, error) {
u, _ := url.Parse("https://api.ddns5.com/update")
// extract the main domain
var mainDomain string
if p.OverrideDomain != "" {
mainDomain = p.OverrideDomain
} else {
// before, would strip everything before 'b': a.b.c.d
// old mainDomain = getMainDomain(domain) // Strip off stuff
//println("77 --doRequest orig domain",domain)
//println("77 --doRequest maindomain",mainDomain)
mainDomain = strings.TrimSuffix(domain, ".") // no longer strip stuff from front
//println("77 --doRequest newmaindomain",mainDomain)
}
if len(mainDomain) == 0 {
return nil, fmt.Errorf("unable to find the main domain for: %s", domain)
}
// ON HOLD
// if params["ip"] != "" && params["ipv6"] != "" {
// return nil, fmt.Errorf("cannot accept both 'ip' and 'ipv6' at the same time")
// }
// WORK ON choosing tcp4 or tcp6 for Http requests
// since ddns5 uses IP address for authentication
//
// var zz :=if params["ip"] != ""
//*http.Client
// transport := http.DefaultTransport.(*http.Transport)
// dialer := transport.DialContext
// transport.DialContext = func(ctx context.Context, network, addr string) (net.Conn, error) {
// return dialer(ctx, "tcp4", addr)
// }
// set up the query with the params we always set
query := u.Query()
query.Set("domains", mainDomain)
query.Set("token", p.APIToken)
// add the remaining ones for this request
for key, val := range params {
query.Set(key, val)
}
// set the query back on the URL
u.RawQuery = query.Encode()
// make the request
req, err := http.NewRequestWithContext(ctx, "GET", u.String(), nil)
if err != nil {
return nil, err
}
resp, err := http.DefaultClient.Do(req)
if err != nil {
return nil, err
}
defer resp.Body.Close()
bodyBytes, err := ioutil.ReadAll(resp.Body)
if err != nil {
return nil, err
}
body := string(bodyBytes)
bodyParts := strings.Split(body, "\n")
if bodyParts[0] != "OK" {
return nil, fmt.Errorf("ddns5.com request failed, expected (OK) but got (%s), url: [%s], body: %s", bodyParts[0], u, body)
}
return bodyParts, nil
}
// DuckDNS only lets you write to your subdomain.
// It must be in format subdomain.duckdns.org,
// not in format subsubdomain.subdomain.duckdns.org.
// So strip off everything that is not top 3 levels.
func getMainDomain(domain string) string {
domain = strings.TrimSuffix(domain, ".")
split := dns.Split(domain)
if strings.HasSuffix(strings.ToLower(domain), "ddns5.com") {
if len(split) < 3 {
return ""
}
firstSubDomainIndex := split[len(split)-3]
return domain[firstSubDomainIndex:]
}
return domain[split[len(split)-1]:]
}