예제 #1
0
파일: serialize.go 프로젝트: martiniss/gae
// WriteProperty writes a Property to the buffer. `context` behaves the same
// way that it does for WriteKey, but only has an effect if `p` contains a
// Key as its Value.
func WriteProperty(buf Buffer, context KeyContext, p ds.Property) (err error) {
	defer recoverTo(&err)
	typb := byte(p.Type())
	if p.IndexSetting() != ds.NoIndex {
		typb |= 0x80
	}
	panicIf(buf.WriteByte(typb))
	switch p.Type() {
	case ds.PTNull:
	case ds.PTBool:
		b := p.Value().(bool)
		if b {
			err = buf.WriteByte(1)
		} else {
			err = buf.WriteByte(0)
		}
	case ds.PTInt:
		_, err = cmpbin.WriteInt(buf, p.Value().(int64))
	case ds.PTFloat:
		_, err = cmpbin.WriteFloat64(buf, p.Value().(float64))
	case ds.PTString:
		_, err = cmpbin.WriteString(buf, p.Value().(string))
	case ds.PTBytes:
		_, err = cmpbin.WriteBytes(buf, p.Value().([]byte))
	case ds.PTTime:
		err = WriteTime(buf, p.Value().(time.Time))
	case ds.PTGeoPoint:
		err = WriteGeoPoint(buf, p.Value().(ds.GeoPoint))
	case ds.PTKey:
		err = WriteKey(buf, context, p.Value().(ds.Key))
	case ds.PTBlobKey:
		_, err = cmpbin.WriteString(buf, string(p.Value().(blobstore.Key)))
	}
	return
}
예제 #2
0
// WritePropertyMap writes an entire PropertyMap to the buffer. `context`
// behaves the same way that it does for WriteKey.
//
// If WritePropertyMapDeterministic is true, then the rows will be sorted by
// property name before they're serialized to buf (mostly useful for testing,
// but also potentially useful if you need to make a hash of the property data).
//
// Write skips metadata keys.
func WritePropertyMap(buf Buffer, context KeyContext, pm ds.PropertyMap) (err error) {
	defer recoverTo(&err)
	rows := make(sort.StringSlice, 0, len(pm))
	tmpBuf := &bytes.Buffer{}
	pm, _ = pm.Save(false)
	for name, vals := range pm {
		tmpBuf.Reset()
		_, e := cmpbin.WriteString(tmpBuf, name)
		panicIf(e)
		_, e = cmpbin.WriteUint(tmpBuf, uint64(len(vals)))
		panicIf(e)
		for _, p := range vals {
			panicIf(WriteProperty(tmpBuf, context, p))
		}
		rows = append(rows, tmpBuf.String())
	}

	if WritePropertyMapDeterministic {
		rows.Sort()
	}

	_, e := cmpbin.WriteUint(buf, uint64(len(pm)))
	panicIf(e)
	for _, r := range rows {
		_, e := buf.WriteString(r)
		panicIf(e)
	}
	return
}
예제 #3
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// writeIndexValue writes the index value of v to buf.
//
// v may be one of the return types from ds.Property's GetIndexTypeAndValue
// method.
func writeIndexValue(buf Buffer, context KeyContext, v interface{}) (err error) {
	switch t := v.(type) {
	case nil:
	case bool:
		b := byte(0)
		if t {
			b = 1
		}
		err = buf.WriteByte(b)
	case int64:
		_, err = cmpbin.WriteInt(buf, t)
	case float64:
		_, err = cmpbin.WriteFloat64(buf, t)
	case string:
		_, err = cmpbin.WriteString(buf, t)
	case []byte:
		_, err = cmpbin.WriteBytes(buf, t)
	case ds.GeoPoint:
		err = WriteGeoPoint(buf, t)
	case *ds.Key:
		err = WriteKey(buf, context, t)

	default:
		err = fmt.Errorf("unsupported type: %T", t)
	}
	return
}
예제 #4
0
// WriteKeyTok writes a KeyTok to the buffer. You usually want WriteKey
// instead of this.
func WriteKeyTok(buf Buffer, tok ds.KeyTok) (err error) {
	// tok.kind ++ typ ++ [tok.stringID || tok.intID]
	defer recoverTo(&err)
	_, e := cmpbin.WriteString(buf, tok.Kind)
	panicIf(e)
	if tok.StringID != "" {
		panicIf(buf.WriteByte(byte(ds.PTString)))
		_, e := cmpbin.WriteString(buf, tok.StringID)
		panicIf(e)
	} else {
		panicIf(buf.WriteByte(byte(ds.PTInt)))
		_, e := cmpbin.WriteInt(buf, tok.IntID)
		panicIf(e)
	}
	return nil
}
예제 #5
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// WriteKey encodes a key to the buffer. If context is WithContext, then this
// encoded value will include the appid and namespace of the key.
func WriteKey(buf Buffer, context KeyContext, k *ds.Key) (err error) {
	// [appid ++ namespace]? ++ [1 ++ token]* ++ NULL
	defer recoverTo(&err)
	appid, namespace, toks := k.Split()
	if context == WithContext {
		panicIf(buf.WriteByte(1))
		_, e := cmpbin.WriteString(buf, appid)
		panicIf(e)
		_, e = cmpbin.WriteString(buf, namespace)
		panicIf(e)
	} else {
		panicIf(buf.WriteByte(0))
	}
	for _, tok := range toks {
		panicIf(buf.WriteByte(1))
		panicIf(WriteKeyTok(buf, tok))
	}
	return buf.WriteByte(0)
}
예제 #6
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// WriteIndexColumn writes an IndexColumn to the buffer.
func WriteIndexColumn(buf Buffer, c ds.IndexColumn) (err error) {
	defer recoverTo(&err)

	if !c.Descending {
		panicIf(buf.WriteByte(0))
	} else {
		panicIf(buf.WriteByte(1))
	}
	_, err = cmpbin.WriteString(buf, c.Property)
	return
}
예제 #7
0
파일: serialize.go 프로젝트: martiniss/gae
// WriteIndexColumn writes an IndexColumn to the buffer.
func WriteIndexColumn(buf Buffer, c ds.IndexColumn) (err error) {
	defer recoverTo(&err)

	if c.Direction == ds.ASCENDING {
		panicIf(buf.WriteByte(0))
	} else {
		panicIf(buf.WriteByte(1))
	}
	_, err = cmpbin.WriteString(buf, c.Property)
	return
}
예제 #8
0
// WriteIndexDefinition writes an IndexDefinition to the buffer
func WriteIndexDefinition(buf Buffer, i ds.IndexDefinition) (err error) {
	defer recoverTo(&err)

	_, err = cmpbin.WriteString(buf, i.Kind)
	panicIf(err)
	if !i.Ancestor {
		panicIf(buf.WriteByte(0))
	} else {
		panicIf(buf.WriteByte(1))
	}
	for _, sb := range i.SortBy {
		panicIf(buf.WriteByte(1))
		panicIf(WriteIndexColumn(buf, sb))
	}
	return buf.WriteByte(0)
}
예제 #9
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// cat is a convenience method for concatenating anything with an underlying
// byte representation into a single []byte.
func cat(bytethings ...interface{}) []byte {
	err := error(nil)
	buf := &bytes.Buffer{}
	for _, thing := range bytethings {
		switch x := thing.(type) {
		case int64:
			_, err = cmpbin.WriteInt(buf, x)
		case int:
			_, err = cmpbin.WriteInt(buf, int64(x))
		case uint64:
			_, err = cmpbin.WriteUint(buf, x)
		case uint:
			_, err = cmpbin.WriteUint(buf, uint64(x))
		case float64:
			_, err = cmpbin.WriteFloat64(buf, x)
		case byte:
			err = buf.WriteByte(x)
		case ds.PropertyType:
			err = buf.WriteByte(byte(x))
		case string:
			_, err = cmpbin.WriteString(buf, x)
		case []byte:
			_, err = buf.Write(x)
		case time.Time:
			err = serialize.WriteTime(buf, x)
		case *ds.Key:
			err = serialize.WriteKey(buf, serialize.WithoutContext, x)
		case *ds.IndexDefinition:
			err = serialize.WriteIndexDefinition(buf, *x)
		case ds.Property:
			err = serialize.WriteProperty(buf, serialize.WithoutContext, x)
		default:
			panic(fmt.Errorf("I don't know how to deal with %T: %#v", thing, thing))
		}
		die(err)
	}
	ret := buf.Bytes()
	if ret == nil {
		ret = []byte{}
	}
	return ret
}
예제 #10
0
func TestSerializationReadMisc(t *testing.T) {
	t.Parallel()

	Convey("Misc Serialization tests", t, func() {
		Convey("GeoPoint", func() {
			buf := mkBuf(nil)
			cmpbin.WriteFloat64(buf, 10)
			cmpbin.WriteFloat64(buf, 20)
			So(string(ToBytes(ds.GeoPoint{Lat: 10, Lng: 20})), ShouldEqual, buf.String())
		})

		Convey("IndexColumn", func() {
			buf := mkBuf(nil)
			buf.WriteByte(1)
			cmpbin.WriteString(buf, "hi")
			So(string(ToBytes(ds.IndexColumn{Property: "hi", Direction: ds.DESCENDING})),
				ShouldEqual, buf.String())
		})

		Convey("KeyTok", func() {
			buf := mkBuf(nil)
			cmpbin.WriteString(buf, "foo")
			buf.WriteByte(byte(ds.PTInt))
			cmpbin.WriteInt(buf, 20)
			So(string(ToBytes(ds.KeyTok{Kind: "foo", IntID: 20})),
				ShouldEqual, buf.String())
		})

		Convey("Property", func() {
			buf := mkBuf(nil)
			buf.WriteByte(0x80 | byte(ds.PTString))
			cmpbin.WriteString(buf, "nerp")
			So(string(ToBytes(mp("nerp"))),
				ShouldEqual, buf.String())
		})

		Convey("Time", func() {
			tp := mp(time.Now().UTC())
			So(string(ToBytes(tp.Value())), ShouldEqual, string(ToBytes(tp)[1:]))
		})

		Convey("Bad ToBytes", func() {
			So(func() { ToBytes(100.7) }, ShouldPanic)
			So(func() { ToBytesWithContext(100.7) }, ShouldPanic)
		})

		Convey("ReadKey", func() {
			Convey("good cases", func() {
				Convey("w/ ctx decodes normally w/ ctx", func() {
					k := mkKey("aid", "ns", "knd", "yo", "other", 10)
					data := ToBytesWithContext(k)
					dk, err := ReadKey(mkBuf(data), WithContext, "", "")
					So(err, ShouldBeNil)
					So(dk, ShouldEqualKey, k)
				})
				Convey("w/ ctx decodes normally w/o ctx", func() {
					k := mkKey("aid", "ns", "knd", "yo", "other", 10)
					data := ToBytesWithContext(k)
					dk, err := ReadKey(mkBuf(data), WithoutContext, "spam", "nerd")
					So(err, ShouldBeNil)
					So(dk, ShouldEqualKey, mkKey("spam", "nerd", "knd", "yo", "other", 10))
				})
				Convey("w/o ctx decodes normally w/ ctx", func() {
					k := mkKey("aid", "ns", "knd", "yo", "other", 10)
					data := ToBytes(k)
					dk, err := ReadKey(mkBuf(data), WithContext, "spam", "nerd")
					So(err, ShouldBeNil)
					So(dk, ShouldEqualKey, mkKey("", "", "knd", "yo", "other", 10))
				})
				Convey("w/o ctx decodes normally w/o ctx", func() {
					k := mkKey("aid", "ns", "knd", "yo", "other", 10)
					data := ToBytes(k)
					dk, err := ReadKey(mkBuf(data), WithoutContext, "spam", "nerd")
					So(err, ShouldBeNil)
					So(dk, ShouldEqualKey, mkKey("spam", "nerd", "knd", "yo", "other", 10))
				})
				Convey("IntIDs always sort before StringIDs", func() {
					// -1 writes as almost all 1's in the first byte under cmpbin, even
					// though it's technically not a valid key.
					k := mkKey("aid", "ns", "knd", -1)
					data := ToBytes(k)

					k = mkKey("aid", "ns", "knd", "hat")
					data2 := ToBytes(k)

					So(string(data), ShouldBeLessThan, string(data2))
				})
			})

			Convey("err cases", func() {
				buf := mkBuf(nil)
				Convey("nil", func() {
					_, err := ReadKey(buf, WithContext, "", "")
					So(err, ShouldEqual, io.EOF)
				})
				Convey("str", func() {
					buf.WriteString("sup")
					_, err := ReadKey(buf, WithContext, "", "")
					So(err, ShouldErrLike, "expected actualCtx")
				})
				Convey("truncated 1", func() {
					buf.WriteByte(1) // actualCtx == 1
					_, err := ReadKey(buf, WithContext, "", "")
					So(err, ShouldEqual, io.EOF)
				})
				Convey("truncated 2", func() {
					buf.WriteByte(1) // actualCtx == 1
					cmpbin.WriteString(buf, "aid")
					_, err := ReadKey(buf, WithContext, "", "")
					So(err, ShouldEqual, io.EOF)
				})
				Convey("truncated 3", func() {
					buf.WriteByte(1) // actualCtx == 1
					cmpbin.WriteString(buf, "aid")
					cmpbin.WriteString(buf, "ns")
					_, err := ReadKey(buf, WithContext, "", "")
					So(err, ShouldEqual, io.EOF)
				})
				Convey("huge key", func() {
					buf.WriteByte(1) // actualCtx == 1
					cmpbin.WriteString(buf, "aid")
					cmpbin.WriteString(buf, "ns")
					for i := 1; i < 60; i++ {
						buf.WriteByte(1)
						WriteKeyTok(buf, ds.KeyTok{Kind: "sup", IntID: int64(i)})
					}
					buf.WriteByte(0)
					_, err := ReadKey(buf, WithContext, "", "")
					So(err, ShouldErrLike, "huge key")
				})
				Convey("insufficient tokens", func() {
					buf.WriteByte(1) // actualCtx == 1
					cmpbin.WriteString(buf, "aid")
					cmpbin.WriteString(buf, "ns")
					cmpbin.WriteUint(buf, 2)
					_, err := ReadKey(buf, WithContext, "", "")
					So(err, ShouldEqual, io.EOF)
				})
				Convey("partial token 1", func() {
					buf.WriteByte(1) // actualCtx == 1
					cmpbin.WriteString(buf, "aid")
					cmpbin.WriteString(buf, "ns")
					buf.WriteByte(1)
					cmpbin.WriteString(buf, "hi")
					_, err := ReadKey(buf, WithContext, "", "")
					So(err, ShouldEqual, io.EOF)
				})
				Convey("partial token 2", func() {
					buf.WriteByte(1) // actualCtx == 1
					cmpbin.WriteString(buf, "aid")
					cmpbin.WriteString(buf, "ns")
					buf.WriteByte(1)
					cmpbin.WriteString(buf, "hi")
					buf.WriteByte(byte(ds.PTString))
					_, err := ReadKey(buf, WithContext, "", "")
					So(err, ShouldEqual, io.EOF)
				})
				Convey("bad token (invalid type)", func() {
					buf.WriteByte(1) // actualCtx == 1
					cmpbin.WriteString(buf, "aid")
					cmpbin.WriteString(buf, "ns")
					buf.WriteByte(1)
					cmpbin.WriteString(buf, "hi")
					buf.WriteByte(byte(ds.PTBlobKey))
					_, err := ReadKey(buf, WithContext, "", "")
					So(err, ShouldErrLike, "invalid type PTBlobKey")
				})
				Convey("bad token (invalid IntID)", func() {
					buf.WriteByte(1) // actualCtx == 1
					cmpbin.WriteString(buf, "aid")
					cmpbin.WriteString(buf, "ns")
					buf.WriteByte(1)
					cmpbin.WriteString(buf, "hi")
					buf.WriteByte(byte(ds.PTInt))
					cmpbin.WriteInt(buf, -2)
					_, err := ReadKey(buf, WithContext, "", "")
					So(err, ShouldErrLike, "zero/negative")
				})
			})
		})

		Convey("ReadGeoPoint", func() {
			buf := mkBuf(nil)
			Convey("trunc 1", func() {
				_, err := ReadGeoPoint(buf)
				So(err, ShouldEqual, io.EOF)
			})
			Convey("trunc 2", func() {
				cmpbin.WriteFloat64(buf, 100)
				_, err := ReadGeoPoint(buf)
				So(err, ShouldEqual, io.EOF)
			})
			Convey("invalid", func() {
				cmpbin.WriteFloat64(buf, 100)
				cmpbin.WriteFloat64(buf, 1000)
				_, err := ReadGeoPoint(buf)
				So(err, ShouldErrLike, "invalid GeoPoint")
			})
		})

		Convey("WriteTime", func() {
			Convey("in non-UTC!", func() {
				pst, err := time.LoadLocation("America/Los_Angeles")
				So(err, ShouldBeNil)
				So(func() {
					WriteTime(mkBuf(nil), time.Now().In(pst))
				}, ShouldPanic)
			})
		})

		Convey("ReadTime", func() {
			Convey("trunc 1", func() {
				_, err := ReadTime(mkBuf(nil))
				So(err, ShouldEqual, io.EOF)
			})
		})

		Convey("ReadProperty", func() {
			buf := mkBuf(nil)
			Convey("trunc 1", func() {
				p, err := ReadProperty(buf, WithContext, "", "")
				So(err, ShouldEqual, io.EOF)
				So(p.Type(), ShouldEqual, ds.PTNull)
				So(p.Value(), ShouldBeNil)
			})
			Convey("trunc (PTBytes)", func() {
				buf.WriteByte(byte(ds.PTBytes))
				_, err := ReadProperty(buf, WithContext, "", "")
				So(err, ShouldEqual, io.EOF)
			})
			Convey("trunc (PTBlobKey)", func() {
				buf.WriteByte(byte(ds.PTBlobKey))
				_, err := ReadProperty(buf, WithContext, "", "")
				So(err, ShouldEqual, io.EOF)
			})
			Convey("invalid type", func() {
				buf.WriteByte(byte(ds.PTUnknown + 1))
				_, err := ReadProperty(buf, WithContext, "", "")
				So(err, ShouldErrLike, "unknown type!")
			})
		})

		Convey("ReadPropertyMap", func() {
			buf := mkBuf(nil)
			Convey("trunc 1", func() {
				_, err := ReadPropertyMap(buf, WithContext, "", "")
				So(err, ShouldEqual, io.EOF)
			})
			Convey("too many rows", func() {
				cmpbin.WriteUint(buf, 1000000)
				_, err := ReadPropertyMap(buf, WithContext, "", "")
				So(err, ShouldErrLike, "huge number of rows")
			})
			Convey("trunc 2", func() {
				cmpbin.WriteUint(buf, 10)
				_, err := ReadPropertyMap(buf, WithContext, "", "")
				So(err, ShouldEqual, io.EOF)
			})
			Convey("trunc 3", func() {
				cmpbin.WriteUint(buf, 10)
				cmpbin.WriteString(buf, "ohai")
				_, err := ReadPropertyMap(buf, WithContext, "", "")
				So(err, ShouldEqual, io.EOF)
			})
			Convey("too many values", func() {
				cmpbin.WriteUint(buf, 10)
				cmpbin.WriteString(buf, "ohai")
				cmpbin.WriteUint(buf, 100000)
				_, err := ReadPropertyMap(buf, WithContext, "", "")
				So(err, ShouldErrLike, "huge number of properties")
			})
			Convey("trunc 4", func() {
				cmpbin.WriteUint(buf, 10)
				cmpbin.WriteString(buf, "ohai")
				cmpbin.WriteUint(buf, 10)
				_, err := ReadPropertyMap(buf, WithContext, "", "")
				So(err, ShouldEqual, io.EOF)
			})
		})

		Convey("IndexDefinition", func() {
			id := ds.IndexDefinition{Kind: "kind"}
			data := ToBytes(*id.PrepForIdxTable())
			newID, err := ReadIndexDefinition(mkBuf(data))
			So(err, ShouldBeNil)
			So(newID.Flip(), ShouldResemble, id.Normalize())

			id.SortBy = append(id.SortBy, ds.IndexColumn{Property: "prop"})
			data = ToBytes(*id.PrepForIdxTable())
			newID, err = ReadIndexDefinition(mkBuf(data))
			So(err, ShouldBeNil)
			So(newID.Flip(), ShouldResemble, id.Normalize())

			id.SortBy = append(id.SortBy, ds.IndexColumn{Property: "other", Direction: ds.DESCENDING})
			id.Ancestor = true
			data = ToBytes(*id.PrepForIdxTable())
			newID, err = ReadIndexDefinition(mkBuf(data))
			So(err, ShouldBeNil)
			So(newID.Flip(), ShouldResemble, id.Normalize())

			// invalid
			id.SortBy = append(id.SortBy, ds.IndexColumn{Property: "", Direction: ds.DESCENDING})
			data = ToBytes(*id.PrepForIdxTable())
			newID, err = ReadIndexDefinition(mkBuf(data))
			So(err, ShouldBeNil)
			So(newID.Flip(), ShouldResemble, id.Normalize())

			Convey("too many", func() {
				id := ds.IndexDefinition{Kind: "wat"}
				for i := 0; i < MaxIndexColumns+1; i++ {
					id.SortBy = append(id.SortBy, ds.IndexColumn{Property: "Hi", Direction: ds.ASCENDING})
				}
				data := ToBytes(*id.PrepForIdxTable())
				newID, err = ReadIndexDefinition(mkBuf(data))
				So(err, ShouldErrLike, "over 64 sort orders")
			})
		})
	})
}
예제 #11
0
func ws(w io.ByteWriter, s string) int {
	ret, err := cmpbin.WriteString(w, s)
	die(err)
	return ret
}