package namecheap import ( "encoding/xml" "fmt" "io/ioutil" "net/http" "net/url" "strings" ) // Record describes a DNS record returned by the Namecheap DNS gethosts API. // Namecheap uses the term "host" to refer to all DNS records that include // a host field (A, AAAA, CNAME, NS, TXT, URL). type Record struct { Type string `xml:",attr"` Name string `xml:",attr"` Address string `xml:",attr"` MXPref string `xml:",attr"` TTL string `xml:",attr"` } // apierror describes an error record in a namecheap API response. type apierror struct { Number int `xml:",attr"` Description string `xml:",innerxml"` } type setHostsResponse struct { XMLName xml.Name `xml:"ApiResponse"` Status string `xml:"Status,attr"` Errors []apierror `xml:"Errors>Error"` Result struct { IsSuccess string `xml:",attr"` } `xml:"CommandResponse>DomainDNSSetHostsResult"` } type getHostsResponse struct { XMLName xml.Name `xml:"ApiResponse"` Status string `xml:"Status,attr"` Errors []apierror `xml:"Errors>Error"` Hosts []Record `xml:"CommandResponse>DomainDNSGetHostsResult>host"` } type getTldsResponse struct { XMLName xml.Name `xml:"ApiResponse"` Errors []apierror `xml:"Errors>Error"` Result []struct { Name string `xml:",attr"` } `xml:"CommandResponse>Tlds>Tld"` } // getTLDs requests the list of available TLDs. // https://www.namecheap.com/support/api/methods/domains/get-tld-list.aspx func (d *DNSProvider) getTLDs() (map[string]string, error) { request, err := d.newRequestGet("namecheap.domains.getTldList") if err != nil { return nil, err } var gtr getTldsResponse err = d.do(request, >r) if err != nil { return nil, err } if len(gtr.Errors) > 0 { return nil, fmt.Errorf("%s [%d]", gtr.Errors[0].Description, gtr.Errors[0].Number) } tlds := make(map[string]string) for _, t := range gtr.Result { tlds[t.Name] = t.Name } return tlds, nil } // getHosts reads the full list of DNS host records. // https://www.namecheap.com/support/api/methods/domains-dns/get-hosts.aspx func (d *DNSProvider) getHosts(sld, tld string) ([]Record, error) { request, err := d.newRequestGet("namecheap.domains.dns.getHosts", addParam("SLD", sld), addParam("TLD", tld), ) if err != nil { return nil, err } var ghr getHostsResponse err = d.do(request, &ghr) if err != nil { return nil, err } if len(ghr.Errors) > 0 { return nil, fmt.Errorf("%s [%d]", ghr.Errors[0].Description, ghr.Errors[0].Number) } return ghr.Hosts, nil } // setHosts writes the full list of DNS host records . // https://www.namecheap.com/support/api/methods/domains-dns/set-hosts.aspx func (d *DNSProvider) setHosts(sld, tld string, hosts []Record) error { req, err := d.newRequestPost("namecheap.domains.dns.setHosts", addParam("SLD", sld), addParam("TLD", tld), func(values url.Values) { for i, h := range hosts { ind := fmt.Sprintf("%d", i+1) values.Add("HostName"+ind, h.Name) values.Add("RecordType"+ind, h.Type) values.Add("Address"+ind, h.Address) values.Add("MXPref"+ind, h.MXPref) values.Add("TTL"+ind, h.TTL) } }, ) if err != nil { return err } var shr setHostsResponse err = d.do(req, &shr) if err != nil { return err } if len(shr.Errors) > 0 { return fmt.Errorf("%s [%d]", shr.Errors[0].Description, shr.Errors[0].Number) } if shr.Result.IsSuccess != "true" { return fmt.Errorf("setHosts failed") } return nil } func (d *DNSProvider) do(req *http.Request, out interface{}) error { resp, err := d.config.HTTPClient.Do(req) if err != nil { return err } if resp.StatusCode >= 400 { var body []byte body, err = readBody(resp) if err != nil { return fmt.Errorf("HTTP error %d [%s]: %v", resp.StatusCode, http.StatusText(resp.StatusCode), err) } return fmt.Errorf("HTTP error %d [%s]: %s", resp.StatusCode, http.StatusText(resp.StatusCode), string(body)) } body, err := readBody(resp) if err != nil { return err } if err := xml.Unmarshal(body, out); err != nil { return err } return nil } func (d *DNSProvider) newRequestGet(cmd string, params ...func(url.Values)) (*http.Request, error) { query := d.makeQuery(cmd, params...) reqURL, err := url.Parse(d.config.BaseURL) if err != nil { return nil, err } reqURL.RawQuery = query.Encode() return http.NewRequest(http.MethodGet, reqURL.String(), nil) } func (d *DNSProvider) newRequestPost(cmd string, params ...func(url.Values)) (*http.Request, error) { query := d.makeQuery(cmd, params...) req, err := http.NewRequest(http.MethodPost, d.config.BaseURL, strings.NewReader(query.Encode())) if err != nil { return nil, err } req.Header.Set("Content-Type", "application/x-www-form-urlencoded") return req, nil } func (d *DNSProvider) makeQuery(cmd string, params ...func(url.Values)) url.Values { queryParams := make(url.Values) queryParams.Set("ApiUser", d.config.APIUser) queryParams.Set("ApiKey", d.config.APIKey) queryParams.Set("UserName", d.config.APIUser) queryParams.Set("Command", cmd) queryParams.Set("ClientIp", d.config.ClientIP) for _, param := range params { param(queryParams) } return queryParams } func addParam(key, value string) func(url.Values) { return func(values url.Values) { values.Set(key, value) } } func readBody(resp *http.Response) ([]byte, error) { if resp.Body == nil { return nil, fmt.Errorf("response body is nil") } defer resp.Body.Close() rawBody, err := ioutil.ReadAll(resp.Body) if err != nil { return nil, err } return rawBody, nil }