diff options
Diffstat (limited to 'vendor/gopkg.in/mgo.v2/bson/json.go')
-rw-r--r-- | vendor/gopkg.in/mgo.v2/bson/json.go | 380 |
1 files changed, 380 insertions, 0 deletions
diff --git a/vendor/gopkg.in/mgo.v2/bson/json.go b/vendor/gopkg.in/mgo.v2/bson/json.go new file mode 100644 index 0000000..09df826 --- /dev/null +++ b/vendor/gopkg.in/mgo.v2/bson/json.go @@ -0,0 +1,380 @@ +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 +} |