| Girish Gowdra | 631ef3d | 2020-06-15 10:45:52 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Licensed to the Apache Software Foundation (ASF) under one |
| 3 | * or more contributor license agreements. See the NOTICE file |
| 4 | * distributed with this work for additional information |
| 5 | * regarding copyright ownership. The ASF licenses this file |
| 6 | * to you under the Apache License, Version 2.0 (the |
| 7 | * "License"); you may not use this file except in compliance |
| 8 | * with the License. You may obtain a copy of the License at |
| 9 | * |
| 10 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 11 | * |
| 12 | * Unless required by applicable law or agreed to in writing, |
| 13 | * software distributed under the License is distributed on an |
| 14 | * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| 15 | * KIND, either express or implied. See the License for the |
| 16 | * specific language governing permissions and limitations |
| 17 | * under the License. |
| 18 | */ |
| 19 | |
| 20 | package thrift |
| 21 | |
| 22 | import ( |
| 23 | "errors" |
| 24 | ) |
| 25 | |
| 26 | const ( |
| 27 | VERSION_MASK = 0xffff0000 |
| 28 | VERSION_1 = 0x80010000 |
| 29 | ) |
| 30 | |
| 31 | type TProtocol interface { |
| 32 | WriteMessageBegin(name string, typeId TMessageType, seqid int32) error |
| 33 | WriteMessageEnd() error |
| 34 | WriteStructBegin(name string) error |
| 35 | WriteStructEnd() error |
| 36 | WriteFieldBegin(name string, typeId TType, id int16) error |
| 37 | WriteFieldEnd() error |
| 38 | WriteFieldStop() error |
| 39 | WriteMapBegin(keyType TType, valueType TType, size int) error |
| 40 | WriteMapEnd() error |
| 41 | WriteListBegin(elemType TType, size int) error |
| 42 | WriteListEnd() error |
| 43 | WriteSetBegin(elemType TType, size int) error |
| 44 | WriteSetEnd() error |
| 45 | WriteBool(value bool) error |
| 46 | WriteByte(value int8) error |
| 47 | WriteI16(value int16) error |
| 48 | WriteI32(value int32) error |
| 49 | WriteI64(value int64) error |
| 50 | WriteDouble(value float64) error |
| 51 | WriteString(value string) error |
| 52 | WriteBinary(value []byte) error |
| 53 | |
| 54 | ReadMessageBegin() (name string, typeId TMessageType, seqid int32, err error) |
| 55 | ReadMessageEnd() error |
| 56 | ReadStructBegin() (name string, err error) |
| 57 | ReadStructEnd() error |
| 58 | ReadFieldBegin() (name string, typeId TType, id int16, err error) |
| 59 | ReadFieldEnd() error |
| 60 | ReadMapBegin() (keyType TType, valueType TType, size int, err error) |
| 61 | ReadMapEnd() error |
| 62 | ReadListBegin() (elemType TType, size int, err error) |
| 63 | ReadListEnd() error |
| 64 | ReadSetBegin() (elemType TType, size int, err error) |
| 65 | ReadSetEnd() error |
| 66 | ReadBool() (value bool, err error) |
| 67 | ReadByte() (value int8, err error) |
| 68 | ReadI16() (value int16, err error) |
| 69 | ReadI32() (value int32, err error) |
| 70 | ReadI64() (value int64, err error) |
| 71 | ReadDouble() (value float64, err error) |
| 72 | ReadString() (value string, err error) |
| 73 | ReadBinary() (value []byte, err error) |
| 74 | |
| 75 | Skip(fieldType TType) (err error) |
| 76 | Flush() (err error) |
| 77 | |
| 78 | Transport() TTransport |
| 79 | } |
| 80 | |
| 81 | // The maximum recursive depth the skip() function will traverse |
| 82 | const DEFAULT_RECURSION_DEPTH = 64 |
| 83 | |
| 84 | // Skips over the next data element from the provided input TProtocol object. |
| 85 | func SkipDefaultDepth(prot TProtocol, typeId TType) (err error) { |
| 86 | return Skip(prot, typeId, DEFAULT_RECURSION_DEPTH) |
| 87 | } |
| 88 | |
| 89 | // Skips over the next data element from the provided input TProtocol object. |
| 90 | func Skip(self TProtocol, fieldType TType, maxDepth int) (err error) { |
| 91 | |
| 92 | if maxDepth <= 0 { |
| 93 | return NewTProtocolExceptionWithType( DEPTH_LIMIT, errors.New("Depth limit exceeded")) |
| 94 | } |
| 95 | |
| 96 | switch fieldType { |
| 97 | case STOP: |
| 98 | return |
| 99 | case BOOL: |
| 100 | _, err = self.ReadBool() |
| 101 | return |
| 102 | case BYTE: |
| 103 | _, err = self.ReadByte() |
| 104 | return |
| 105 | case I16: |
| 106 | _, err = self.ReadI16() |
| 107 | return |
| 108 | case I32: |
| 109 | _, err = self.ReadI32() |
| 110 | return |
| 111 | case I64: |
| 112 | _, err = self.ReadI64() |
| 113 | return |
| 114 | case DOUBLE: |
| 115 | _, err = self.ReadDouble() |
| 116 | return |
| 117 | case STRING: |
| 118 | _, err = self.ReadString() |
| 119 | return |
| 120 | case STRUCT: |
| 121 | if _, err = self.ReadStructBegin(); err != nil { |
| 122 | return err |
| 123 | } |
| 124 | for { |
| 125 | _, typeId, _, _ := self.ReadFieldBegin() |
| 126 | if typeId == STOP { |
| 127 | break |
| 128 | } |
| 129 | err := Skip(self, typeId, maxDepth-1) |
| 130 | if err != nil { |
| 131 | return err |
| 132 | } |
| 133 | self.ReadFieldEnd() |
| 134 | } |
| 135 | return self.ReadStructEnd() |
| 136 | case MAP: |
| 137 | keyType, valueType, size, err := self.ReadMapBegin() |
| 138 | if err != nil { |
| 139 | return err |
| 140 | } |
| 141 | for i := 0; i < size; i++ { |
| 142 | err := Skip(self, keyType, maxDepth-1) |
| 143 | if err != nil { |
| 144 | return err |
| 145 | } |
| 146 | self.Skip(valueType) |
| 147 | } |
| 148 | return self.ReadMapEnd() |
| 149 | case SET: |
| 150 | elemType, size, err := self.ReadSetBegin() |
| 151 | if err != nil { |
| 152 | return err |
| 153 | } |
| 154 | for i := 0; i < size; i++ { |
| 155 | err := Skip(self, elemType, maxDepth-1) |
| 156 | if err != nil { |
| 157 | return err |
| 158 | } |
| 159 | } |
| 160 | return self.ReadSetEnd() |
| 161 | case LIST: |
| 162 | elemType, size, err := self.ReadListBegin() |
| 163 | if err != nil { |
| 164 | return err |
| 165 | } |
| 166 | for i := 0; i < size; i++ { |
| 167 | err := Skip(self, elemType, maxDepth-1) |
| 168 | if err != nil { |
| 169 | return err |
| 170 | } |
| 171 | } |
| 172 | return self.ReadListEnd() |
| 173 | } |
| 174 | return nil |
| 175 | } |