| package bson |
| |
| import ( |
| "bytes" |
| "encoding/base64" |
| "fmt" |
| "gopkg.in/mgo.v2/internal/json" |
| "strconv" |
| "time" |
| ) |
| |
| // UnmarshalJSON unmarshals a JSON value that may hold non-standard |
| // syntax as defined in BSON's extended JSON specification. |
| func UnmarshalJSON(data []byte, value interface{}) error { |
| d := json.NewDecoder(bytes.NewBuffer(data)) |
| d.Extend(&jsonExt) |
| return d.Decode(value) |
| } |
| |
| // MarshalJSON marshals a JSON value that may hold non-standard |
| // syntax as defined in BSON's extended JSON specification. |
| func MarshalJSON(value interface{}) ([]byte, error) { |
| var buf bytes.Buffer |
| e := json.NewEncoder(&buf) |
| e.Extend(&jsonExt) |
| err := e.Encode(value) |
| if err != nil { |
| return nil, err |
| } |
| return buf.Bytes(), nil |
| } |
| |
| // jdec is used internally by the JSON decoding functions |
| // so they may unmarshal functions without getting into endless |
| // recursion due to keyed objects. |
| func jdec(data []byte, value interface{}) error { |
| d := json.NewDecoder(bytes.NewBuffer(data)) |
| d.Extend(&funcExt) |
| return d.Decode(value) |
| } |
| |
| var jsonExt json.Extension |
| var funcExt json.Extension |
| |
| // TODO |
| // - Shell regular expressions ("/regexp/opts") |
| |
| func init() { |
| jsonExt.DecodeUnquotedKeys(true) |
| jsonExt.DecodeTrailingCommas(true) |
| |
| funcExt.DecodeFunc("BinData", "$binaryFunc", "$type", "$binary") |
| jsonExt.DecodeKeyed("$binary", jdecBinary) |
| jsonExt.DecodeKeyed("$binaryFunc", jdecBinary) |
| jsonExt.EncodeType([]byte(nil), jencBinarySlice) |
| jsonExt.EncodeType(Binary{}, jencBinaryType) |
| |
| funcExt.DecodeFunc("ISODate", "$dateFunc", "S") |
| funcExt.DecodeFunc("new Date", "$dateFunc", "S") |
| jsonExt.DecodeKeyed("$date", jdecDate) |
| jsonExt.DecodeKeyed("$dateFunc", jdecDate) |
| jsonExt.EncodeType(time.Time{}, jencDate) |
| |
| funcExt.DecodeFunc("Timestamp", "$timestamp", "t", "i") |
| jsonExt.DecodeKeyed("$timestamp", jdecTimestamp) |
| jsonExt.EncodeType(MongoTimestamp(0), jencTimestamp) |
| |
| funcExt.DecodeConst("undefined", Undefined) |
| |
| jsonExt.DecodeKeyed("$regex", jdecRegEx) |
| jsonExt.EncodeType(RegEx{}, jencRegEx) |
| |
| funcExt.DecodeFunc("ObjectId", "$oidFunc", "Id") |
| jsonExt.DecodeKeyed("$oid", jdecObjectId) |
| jsonExt.DecodeKeyed("$oidFunc", jdecObjectId) |
| jsonExt.EncodeType(ObjectId(""), jencObjectId) |
| |
| funcExt.DecodeFunc("DBRef", "$dbrefFunc", "$ref", "$id") |
| jsonExt.DecodeKeyed("$dbrefFunc", jdecDBRef) |
| |
| funcExt.DecodeFunc("NumberLong", "$numberLongFunc", "N") |
| jsonExt.DecodeKeyed("$numberLong", jdecNumberLong) |
| jsonExt.DecodeKeyed("$numberLongFunc", jdecNumberLong) |
| jsonExt.EncodeType(int64(0), jencNumberLong) |
| jsonExt.EncodeType(int(0), jencInt) |
| |
| funcExt.DecodeConst("MinKey", MinKey) |
| funcExt.DecodeConst("MaxKey", MaxKey) |
| jsonExt.DecodeKeyed("$minKey", jdecMinKey) |
| jsonExt.DecodeKeyed("$maxKey", jdecMaxKey) |
| jsonExt.EncodeType(orderKey(0), jencMinMaxKey) |
| |
| jsonExt.DecodeKeyed("$undefined", jdecUndefined) |
| jsonExt.EncodeType(Undefined, jencUndefined) |
| |
| jsonExt.Extend(&funcExt) |
| } |
| |
| func fbytes(format string, args ...interface{}) []byte { |
| var buf bytes.Buffer |
| fmt.Fprintf(&buf, format, args...) |
| return buf.Bytes() |
| } |
| |
| func jdecBinary(data []byte) (interface{}, error) { |
| var v struct { |
| Binary []byte `json:"$binary"` |
| Type string `json:"$type"` |
| Func struct { |
| Binary []byte `json:"$binary"` |
| Type int64 `json:"$type"` |
| } `json:"$binaryFunc"` |
| } |
| err := jdec(data, &v) |
| if err != nil { |
| return nil, err |
| } |
| |
| var binData []byte |
| var binKind int64 |
| if v.Type == "" && v.Binary == nil { |
| binData = v.Func.Binary |
| binKind = v.Func.Type |
| } else if v.Type == "" { |
| return v.Binary, nil |
| } else { |
| binData = v.Binary |
| binKind, err = strconv.ParseInt(v.Type, 0, 64) |
| if err != nil { |
| binKind = -1 |
| } |
| } |
| |
| if binKind == 0 { |
| return binData, nil |
| } |
| if binKind < 0 || binKind > 255 { |
| return nil, fmt.Errorf("invalid type in binary object: %s", data) |
| } |
| |
| return Binary{Kind: byte(binKind), Data: binData}, nil |
| } |
| |
| func jencBinarySlice(v interface{}) ([]byte, error) { |
| in := v.([]byte) |
| out := make([]byte, base64.StdEncoding.EncodedLen(len(in))) |
| base64.StdEncoding.Encode(out, in) |
| return fbytes(`{"$binary":"%s","$type":"0x0"}`, out), nil |
| } |
| |
| func jencBinaryType(v interface{}) ([]byte, error) { |
| in := v.(Binary) |
| out := make([]byte, base64.StdEncoding.EncodedLen(len(in.Data))) |
| base64.StdEncoding.Encode(out, in.Data) |
| return fbytes(`{"$binary":"%s","$type":"0x%x"}`, out, in.Kind), nil |
| } |
| |
| const jdateFormat = "2006-01-02T15:04:05.999Z" |
| |
| func jdecDate(data []byte) (interface{}, error) { |
| var v struct { |
| S string `json:"$date"` |
| Func struct { |
| S string |
| } `json:"$dateFunc"` |
| } |
| _ = jdec(data, &v) |
| if v.S == "" { |
| v.S = v.Func.S |
| } |
| if v.S != "" { |
| for _, format := range []string{jdateFormat, "2006-01-02"} { |
| t, err := time.Parse(format, v.S) |
| if err == nil { |
| return t, nil |
| } |
| } |
| return nil, fmt.Errorf("cannot parse date: %q", v.S) |
| } |
| |
| var vn struct { |
| Date struct { |
| N int64 `json:"$numberLong,string"` |
| } `json:"$date"` |
| Func struct { |
| S int64 |
| } `json:"$dateFunc"` |
| } |
| err := jdec(data, &vn) |
| if err != nil { |
| return nil, fmt.Errorf("cannot parse date: %q", data) |
| } |
| n := vn.Date.N |
| if n == 0 { |
| n = vn.Func.S |
| } |
| return time.Unix(n/1000, n%1000*1e6).UTC(), nil |
| } |
| |
| func jencDate(v interface{}) ([]byte, error) { |
| t := v.(time.Time) |
| return fbytes(`{"$date":%q}`, t.Format(jdateFormat)), nil |
| } |
| |
| func jdecTimestamp(data []byte) (interface{}, error) { |
| var v struct { |
| Func struct { |
| T int32 `json:"t"` |
| I int32 `json:"i"` |
| } `json:"$timestamp"` |
| } |
| err := jdec(data, &v) |
| if err != nil { |
| return nil, err |
| } |
| return MongoTimestamp(uint64(v.Func.T)<<32 | uint64(uint32(v.Func.I))), nil |
| } |
| |
| func jencTimestamp(v interface{}) ([]byte, error) { |
| ts := uint64(v.(MongoTimestamp)) |
| return fbytes(`{"$timestamp":{"t":%d,"i":%d}}`, ts>>32, uint32(ts)), nil |
| } |
| |
| func jdecRegEx(data []byte) (interface{}, error) { |
| var v struct { |
| Regex string `json:"$regex"` |
| Options string `json:"$options"` |
| } |
| err := jdec(data, &v) |
| if err != nil { |
| return nil, err |
| } |
| return RegEx{v.Regex, v.Options}, nil |
| } |
| |
| func jencRegEx(v interface{}) ([]byte, error) { |
| re := v.(RegEx) |
| type regex struct { |
| Regex string `json:"$regex"` |
| Options string `json:"$options"` |
| } |
| return json.Marshal(regex{re.Pattern, re.Options}) |
| } |
| |
| func jdecObjectId(data []byte) (interface{}, error) { |
| var v struct { |
| Id string `json:"$oid"` |
| Func struct { |
| Id string |
| } `json:"$oidFunc"` |
| } |
| err := jdec(data, &v) |
| if err != nil { |
| return nil, err |
| } |
| if v.Id == "" { |
| v.Id = v.Func.Id |
| } |
| return ObjectIdHex(v.Id), nil |
| } |
| |
| func jencObjectId(v interface{}) ([]byte, error) { |
| return fbytes(`{"$oid":"%s"}`, v.(ObjectId).Hex()), nil |
| } |
| |
| func jdecDBRef(data []byte) (interface{}, error) { |
| // TODO Support unmarshaling $ref and $id into the input value. |
| var v struct { |
| Obj map[string]interface{} `json:"$dbrefFunc"` |
| } |
| // TODO Fix this. Must not be required. |
| v.Obj = make(map[string]interface{}) |
| err := jdec(data, &v) |
| if err != nil { |
| return nil, err |
| } |
| return v.Obj, nil |
| } |
| |
| func jdecNumberLong(data []byte) (interface{}, error) { |
| var v struct { |
| N int64 `json:"$numberLong,string"` |
| Func struct { |
| N int64 `json:",string"` |
| } `json:"$numberLongFunc"` |
| } |
| var vn struct { |
| N int64 `json:"$numberLong"` |
| Func struct { |
| N int64 |
| } `json:"$numberLongFunc"` |
| } |
| err := jdec(data, &v) |
| if err != nil { |
| err = jdec(data, &vn) |
| v.N = vn.N |
| v.Func.N = vn.Func.N |
| } |
| if err != nil { |
| return nil, err |
| } |
| if v.N != 0 { |
| return v.N, nil |
| } |
| return v.Func.N, nil |
| } |
| |
| func jencNumberLong(v interface{}) ([]byte, error) { |
| n := v.(int64) |
| f := `{"$numberLong":"%d"}` |
| if n <= 1<<53 { |
| f = `{"$numberLong":%d}` |
| } |
| return fbytes(f, n), nil |
| } |
| |
| func jencInt(v interface{}) ([]byte, error) { |
| n := v.(int) |
| f := `{"$numberLong":"%d"}` |
| if int64(n) <= 1<<53 { |
| f = `%d` |
| } |
| return fbytes(f, n), nil |
| } |
| |
| func jdecMinKey(data []byte) (interface{}, error) { |
| var v struct { |
| N int64 `json:"$minKey"` |
| } |
| err := jdec(data, &v) |
| if err != nil { |
| return nil, err |
| } |
| if v.N != 1 { |
| return nil, fmt.Errorf("invalid $minKey object: %s", data) |
| } |
| return MinKey, nil |
| } |
| |
| func jdecMaxKey(data []byte) (interface{}, error) { |
| var v struct { |
| N int64 `json:"$maxKey"` |
| } |
| err := jdec(data, &v) |
| if err != nil { |
| return nil, err |
| } |
| if v.N != 1 { |
| return nil, fmt.Errorf("invalid $maxKey object: %s", data) |
| } |
| return MaxKey, nil |
| } |
| |
| func jencMinMaxKey(v interface{}) ([]byte, error) { |
| switch v.(orderKey) { |
| case MinKey: |
| return []byte(`{"$minKey":1}`), nil |
| case MaxKey: |
| return []byte(`{"$maxKey":1}`), nil |
| } |
| panic(fmt.Sprintf("invalid $minKey/$maxKey value: %d", v)) |
| } |
| |
| func jdecUndefined(data []byte) (interface{}, error) { |
| var v struct { |
| B bool `json:"$undefined"` |
| } |
| err := jdec(data, &v) |
| if err != nil { |
| return nil, err |
| } |
| if !v.B { |
| return nil, fmt.Errorf("invalid $undefined object: %s", data) |
| } |
| return Undefined, nil |
| } |
| |
| func jencUndefined(v interface{}) ([]byte, error) { |
| return []byte(`{"$undefined":true}`), nil |
| } |