|
| 1 | +package imapserver |
| 2 | + |
| 3 | +import ( |
| 4 | + "fmt" |
| 5 | + "strings" |
| 6 | + |
| 7 | + "github.com/emersion/go-imap/v2" |
| 8 | + "github.com/emersion/go-imap/v2/internal/imapwire" |
| 9 | +) |
| 10 | + |
| 11 | +func (c *Conn) handleID(tag string, dec *imapwire.Decoder) error { |
| 12 | + idData, err := readID(dec) |
| 13 | + if err != nil { |
| 14 | + return fmt.Errorf("in id: %v", err) |
| 15 | + } |
| 16 | + |
| 17 | + if !dec.ExpectCRLF() { |
| 18 | + return dec.Err() |
| 19 | + } |
| 20 | + |
| 21 | + var serverIDData *imap.IDData |
| 22 | + if idSess, ok := c.session.(SessionID); ok { |
| 23 | + serverIDData = idSess.ID(idData) |
| 24 | + } |
| 25 | + |
| 26 | + enc := newResponseEncoder(c) |
| 27 | + enc.Atom("*").SP().Atom("ID") |
| 28 | + |
| 29 | + if serverIDData == nil { |
| 30 | + enc.SP().NIL() |
| 31 | + } else { |
| 32 | + enc.SP().Special('(') |
| 33 | + isFirstKey := true |
| 34 | + if serverIDData.Name != "" { |
| 35 | + addIDKeyValue(enc.Encoder, &isFirstKey, "name", serverIDData.Name) |
| 36 | + } |
| 37 | + if serverIDData.Version != "" { |
| 38 | + addIDKeyValue(enc.Encoder, &isFirstKey, "version", serverIDData.Version) |
| 39 | + } |
| 40 | + if serverIDData.OS != "" { |
| 41 | + addIDKeyValue(enc.Encoder, &isFirstKey, "os", serverIDData.OS) |
| 42 | + } |
| 43 | + if serverIDData.OSVersion != "" { |
| 44 | + addIDKeyValue(enc.Encoder, &isFirstKey, "os-version", serverIDData.OSVersion) |
| 45 | + } |
| 46 | + if serverIDData.Vendor != "" { |
| 47 | + addIDKeyValue(enc.Encoder, &isFirstKey, "vendor", serverIDData.Vendor) |
| 48 | + } |
| 49 | + if serverIDData.SupportURL != "" { |
| 50 | + addIDKeyValue(enc.Encoder, &isFirstKey, "support-url", serverIDData.SupportURL) |
| 51 | + } |
| 52 | + if serverIDData.Address != "" { |
| 53 | + addIDKeyValue(enc.Encoder, &isFirstKey, "address", serverIDData.Address) |
| 54 | + } |
| 55 | + if serverIDData.Date != "" { |
| 56 | + addIDKeyValue(enc.Encoder, &isFirstKey, "date", serverIDData.Date) |
| 57 | + } |
| 58 | + if serverIDData.Command != "" { |
| 59 | + addIDKeyValue(enc.Encoder, &isFirstKey, "command", serverIDData.Command) |
| 60 | + } |
| 61 | + if serverIDData.Arguments != "" { |
| 62 | + addIDKeyValue(enc.Encoder, &isFirstKey, "arguments", serverIDData.Arguments) |
| 63 | + } |
| 64 | + if serverIDData.Environment != "" { |
| 65 | + addIDKeyValue(enc.Encoder, &isFirstKey, "environment", serverIDData.Environment) |
| 66 | + } |
| 67 | + if serverIDData.Raw != nil { |
| 68 | + stdKeys := map[string]struct{}{ |
| 69 | + "name": {}, "version": {}, "os": {}, "os-version": {}, "vendor": {}, |
| 70 | + "support-url": {}, "address": {}, "date": {}, "command": {}, |
| 71 | + "arguments": {}, "environment": {}, |
| 72 | + } |
| 73 | + for k, v := range serverIDData.Raw { |
| 74 | + if _, ok := stdKeys[strings.ToLower(k)]; !ok { |
| 75 | + addIDKeyValue(enc.Encoder, &isFirstKey, k, v) |
| 76 | + } |
| 77 | + } |
| 78 | + } |
| 79 | + enc.Special(')') |
| 80 | + } |
| 81 | + |
| 82 | + err = enc.CRLF() |
| 83 | + enc.end() |
| 84 | + if err != nil { |
| 85 | + return err |
| 86 | + } |
| 87 | + |
| 88 | + return c.writeStatusResp(tag, &imap.StatusResponse{ |
| 89 | + Type: imap.StatusResponseTypeOK, |
| 90 | + Text: "ID completed", |
| 91 | + }) |
| 92 | +} |
| 93 | + |
| 94 | +func readID(dec *imapwire.Decoder) (*imap.IDData, error) { |
| 95 | + if !dec.ExpectSP() { |
| 96 | + return nil, dec.Err() |
| 97 | + } |
| 98 | + |
| 99 | + if dec.ExpectNIL() { |
| 100 | + return nil, nil |
| 101 | + } |
| 102 | + |
| 103 | + data := &imap.IDData{ |
| 104 | + Raw: make(map[string]string), |
| 105 | + } |
| 106 | + currKey := "" |
| 107 | + err := dec.ExpectList(func() error { |
| 108 | + var keyOrValue string |
| 109 | + if !dec.String(&keyOrValue) { |
| 110 | + return fmt.Errorf("in id key-val list: %v", dec.Err()) |
| 111 | + } |
| 112 | + |
| 113 | + if currKey == "" { |
| 114 | + currKey = keyOrValue |
| 115 | + return nil |
| 116 | + } |
| 117 | + |
| 118 | + lowerKey := strings.ToLower(currKey) |
| 119 | + data.Raw[lowerKey] = keyOrValue |
| 120 | + |
| 121 | + switch lowerKey { |
| 122 | + case "name": |
| 123 | + data.Name = keyOrValue |
| 124 | + case "version": |
| 125 | + data.Version = keyOrValue |
| 126 | + case "os": |
| 127 | + data.OS = keyOrValue |
| 128 | + case "os-version": |
| 129 | + data.OSVersion = keyOrValue |
| 130 | + case "vendor": |
| 131 | + data.Vendor = keyOrValue |
| 132 | + case "support-url": |
| 133 | + data.SupportURL = keyOrValue |
| 134 | + case "address": |
| 135 | + data.Address = keyOrValue |
| 136 | + case "date": |
| 137 | + data.Date = keyOrValue |
| 138 | + case "command": |
| 139 | + data.Command = keyOrValue |
| 140 | + case "arguments": |
| 141 | + data.Arguments = keyOrValue |
| 142 | + case "environment": |
| 143 | + data.Environment = keyOrValue |
| 144 | + default: |
| 145 | + // Unknown key, already stored in Raw |
| 146 | + } |
| 147 | + currKey = "" |
| 148 | + |
| 149 | + return nil |
| 150 | + }) |
| 151 | + |
| 152 | + if err != nil { |
| 153 | + return nil, err |
| 154 | + } |
| 155 | + |
| 156 | + return data, nil |
| 157 | +} |
| 158 | + |
| 159 | +func addIDKeyValue(enc *imapwire.Encoder, isFirstKey *bool, key, value string) { |
| 160 | + if *isFirstKey { |
| 161 | + enc.Quoted(key).SP().Quoted(value) |
| 162 | + } else { |
| 163 | + enc.SP().Quoted(key).SP().Quoted(value) |
| 164 | + } |
| 165 | + *isFirstKey = false |
| 166 | +} |
| 167 | + |
| 168 | +// SessionID is an interface for sessions that can provide server ID information. |
| 169 | +type SessionID interface { |
| 170 | + // ID returns server information in response to a client ID command. |
| 171 | + // The client's ID information is provided if available. |
| 172 | + ID(clientID *imap.IDData) *imap.IDData |
| 173 | +} |
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