|
| 1 | +package servercow |
| 2 | + |
| 3 | +import ( |
| 4 | + "bytes" |
| 5 | + "context" |
| 6 | + "encoding/json" |
| 7 | + "fmt" |
| 8 | + "net" |
| 9 | + "net/http" |
| 10 | + "net/url" |
| 11 | + "strings" |
| 12 | + |
| 13 | + "github.com/qdm12/ddns-updater/internal/models" |
| 14 | + "github.com/qdm12/ddns-updater/internal/settings/constants" |
| 15 | + "github.com/qdm12/ddns-updater/internal/settings/errors" |
| 16 | + "github.com/qdm12/ddns-updater/internal/settings/headers" |
| 17 | + "github.com/qdm12/ddns-updater/internal/settings/log" |
| 18 | + "github.com/qdm12/ddns-updater/internal/settings/utils" |
| 19 | + "github.com/qdm12/ddns-updater/pkg/publicip/ipversion" |
| 20 | +) |
| 21 | + |
| 22 | +type provider struct { |
| 23 | + username string |
| 24 | + host string |
| 25 | + domain string |
| 26 | + ipVersion ipversion.IPVersion |
| 27 | + password string |
| 28 | + useProviderIP bool |
| 29 | + ttl uint |
| 30 | + logger log.Logger |
| 31 | +} |
| 32 | + |
| 33 | +func New(data json.RawMessage, domain, host string, ipVersion ipversion.IPVersion, |
| 34 | + logger log.Logger) (p *provider, err error) { |
| 35 | + extraSettings := struct { |
| 36 | + Username string `json:"username"` |
| 37 | + Password string `json:"password"` |
| 38 | + Domain string `json:"domain"` |
| 39 | + TTL uint `json:"ttl"` |
| 40 | + UseProviderIP bool `json:"provider_ip"` |
| 41 | + }{} |
| 42 | + if err := json.Unmarshal(data, &extraSettings); err != nil { |
| 43 | + return nil, err |
| 44 | + } |
| 45 | + |
| 46 | + p = &provider{ |
| 47 | + host: host, |
| 48 | + ipVersion: ipVersion, |
| 49 | + username: extraSettings.Username, |
| 50 | + password: extraSettings.Password, |
| 51 | + useProviderIP: extraSettings.UseProviderIP, |
| 52 | + domain: extraSettings.Domain, |
| 53 | + logger: logger, |
| 54 | + ttl: extraSettings.TTL, |
| 55 | + } |
| 56 | + if err := p.isValid(); err != nil { |
| 57 | + return nil, err |
| 58 | + } |
| 59 | + return p, nil |
| 60 | +} |
| 61 | + |
| 62 | +func (p *provider) isValid() error { |
| 63 | + switch { |
| 64 | + case p.username == "": |
| 65 | + return errors.ErrEmptyUsername |
| 66 | + case p.password == "": |
| 67 | + return errors.ErrEmptyPassword |
| 68 | + } |
| 69 | + if strings.Contains(p.host, "*") { |
| 70 | + return errors.ErrHostWildcard |
| 71 | + } |
| 72 | + return nil |
| 73 | +} |
| 74 | + |
| 75 | +func (p *provider) String() string { |
| 76 | + return utils.ToString("servercow.de", p.host, constants.Servercow, p.ipVersion) |
| 77 | +} |
| 78 | + |
| 79 | +func (p *provider) Domain() string { |
| 80 | + return p.domain |
| 81 | +} |
| 82 | + |
| 83 | +func (p *provider) Host() string { |
| 84 | + return p.host |
| 85 | +} |
| 86 | + |
| 87 | +func (p *provider) IPVersion() ipversion.IPVersion { |
| 88 | + return p.ipVersion |
| 89 | +} |
| 90 | + |
| 91 | +func (p *provider) Proxied() bool { |
| 92 | + return false |
| 93 | +} |
| 94 | + |
| 95 | +func (p *provider) BuildDomainName() string { |
| 96 | + return utils.BuildDomainName(p.host, p.domain) |
| 97 | +} |
| 98 | + |
| 99 | +func (p *provider) HTML() models.HTMLRow { |
| 100 | + return models.HTMLRow{ |
| 101 | + Domain: models.HTML(fmt.Sprintf("<a href=\"http://%s\">%s</a>", p.BuildDomainName(), p.BuildDomainName())), |
| 102 | + Host: models.HTML(p.Host()), |
| 103 | + Provider: "<a href=\"https://servercow.de\">Servercow</a>", |
| 104 | + IPVersion: models.HTML(p.ipVersion.String()), |
| 105 | + } |
| 106 | +} |
| 107 | + |
| 108 | +func (p *provider) Update(ctx context.Context, client *http.Client, ip net.IP) (newIP net.IP, err error) { |
| 109 | + recordType := constants.A |
| 110 | + if ip.To4() == nil { |
| 111 | + recordType = constants.AAAA |
| 112 | + } |
| 113 | + u := url.URL{ |
| 114 | + Scheme: "https", |
| 115 | + Host: "api.servercow.de", |
| 116 | + Path: "/dns/v1/domains/" + p.domain, |
| 117 | + } |
| 118 | + |
| 119 | + updateHost := p.host |
| 120 | + if updateHost == "@" { |
| 121 | + updateHost = "" |
| 122 | + } |
| 123 | + |
| 124 | + requestData := struct { |
| 125 | + Type string `json:"type"` // constants.A or constants.AAAA depending on ip address given |
| 126 | + Name string `json:"name"` // DNS record name (only the subdomain part) |
| 127 | + Content string `json:"content"` // ip address |
| 128 | + TTL uint `json:"ttl"` |
| 129 | + }{ |
| 130 | + Type: recordType, |
| 131 | + Name: updateHost, |
| 132 | + Content: ip.String(), |
| 133 | + TTL: p.ttl, |
| 134 | + } |
| 135 | + |
| 136 | + buffer := bytes.NewBuffer(nil) |
| 137 | + encoder := json.NewEncoder(buffer) |
| 138 | + if err := encoder.Encode(requestData); err != nil { |
| 139 | + return nil, fmt.Errorf("%w: %s", errors.ErrRequestEncode, err) |
| 140 | + } |
| 141 | + |
| 142 | + p.logger.Debug("HTTP POST: " + u.String() + ": " + buffer.String()) |
| 143 | + |
| 144 | + request, err := http.NewRequestWithContext(ctx, http.MethodPost, u.String(), buffer) |
| 145 | + if err != nil { |
| 146 | + return nil, err |
| 147 | + } |
| 148 | + headers.SetContentType(request, "application/json") |
| 149 | + headers.SetXAuthUsername(request, p.username) |
| 150 | + headers.SetXAuthPassword(request, p.password) |
| 151 | + headers.SetUserAgent(request) |
| 152 | + |
| 153 | + response, err := client.Do(request) |
| 154 | + if err != nil { |
| 155 | + return nil, err |
| 156 | + } |
| 157 | + defer response.Body.Close() |
| 158 | + |
| 159 | + if response.StatusCode > http.StatusUnsupportedMediaType { |
| 160 | + return nil, fmt.Errorf("%w: %d: %s", |
| 161 | + errors.ErrBadHTTPStatus, response.StatusCode, utils.BodyToSingleLine(response.Body)) |
| 162 | + } |
| 163 | + |
| 164 | + decoder := json.NewDecoder(response.Body) |
| 165 | + |
| 166 | + var parsedJSON struct { |
| 167 | + Message string `json:"message"` |
| 168 | + Error string `json:"error"` |
| 169 | + } |
| 170 | + |
| 171 | + if err := decoder.Decode(&parsedJSON); err != nil { |
| 172 | + return nil, fmt.Errorf("%w: %s", errors.ErrUnmarshalResponse, err) |
| 173 | + } |
| 174 | + |
| 175 | + if parsedJSON.Message != "ok" { |
| 176 | + return nil, fmt.Errorf("%w: %s", errors.ErrUnsuccessfulResponse, parsedJSON.Error) |
| 177 | + } |
| 178 | + |
| 179 | + return ip, nil |
| 180 | +} |
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