icio/jsonerrors

Go JSON Parsers: Errors

Go Version: go1.10

Test: Unknown object property.

Body:

{"cat": "Sammy", "dog": "Loki"}

Target:

struct { Cat string "json:\"cat\"" }

• pkg encoding/json (stdlib)

  • json.Unmarshal

    Err: <nil>

     (interface {}) <nil>

  • json.Decoder.DisallowUnknownFields

    Err: json: unknown field "dog"

     (*errors.errorString)(0xc4200a4c30)({
       s: (string) (len=25) "json: unknown field \"dog\""
     })

• pkg github.com/json-iterator/go

  • jsoniter.ConfigCompatibleWithStandardLibrary

    Err: <nil>

     (interface {}) <nil>

• pkg github.com/koki/json

  • json.Unmarshal

    Err: <nil>

     (interface {}) <nil>

  • json.UnmarshalMap

    Err: <nil>

     (interface {}) <nil>

  • json.UnmarshalMap + jsonutil.ExtraneousFieldPaths

    Err: extraneous fields (typos?) at paths: $.dog

     (*jsonutil.ExtraneousFieldsError)(0xc4200bae80)({
       Paths: ([][]string) (len=1 cap=1) {
         ([]string) (len=1 cap=1) {
           (string) (len=3) "dog"
         }
       }
     })

Test: Using a string instead of an object.

Body:

{"cat": "sammy"}

Target:

struct { Cat struct {} "json:\"cat\"" }

• pkg encoding/json (stdlib)

  • json.Unmarshal

    Err: json: cannot unmarshal string into Go struct field .cat of type struct {}

     (*json.UnmarshalTypeError)(0xc4200be4b0)({
       Value: (string) (len=6) "string",
       Type: (*reflect.rtype)(0x120fb20)({
         size: (uintptr) <nil>,
         ptrdata: (uintptr) <nil>,
         hash: (uint32) 670477339,
         tflag: (reflect.tflag) 2,
         align: (uint8) 1,
         fieldAlign: (uint8) 1,
         kind: (uint8) 153,
         alg: (*reflect.typeAlg)(0x13bdd30)({
           hash: (func(unsafe.Pointer, uintptr) uintptr) 0x1001b60,
           equal: (func(unsafe.Pointer, unsafe.Pointer) bool) 0x1002360
         }),
         gcdata: (*uint8)(0x127a228)(1),
         str: (reflect.nameOff) 21559,
         ptrToThis: (reflect.typeOff) 118240
       }),
       Offset: (int64) 15,
       Struct: (string) "",
       Field: (string) (len=3) "cat"
     })

  • json.Decoder.DisallowUnknownFields

    Err: json: cannot unmarshal string into Go struct field .cat of type struct {}

     (*json.UnmarshalTypeError)(0xc4200be500)({
       Value: (string) (len=6) "string",
       Type: (*reflect.rtype)(0x120fb20)({
         size: (uintptr) <nil>,
         ptrdata: (uintptr) <nil>,
         hash: (uint32) 670477339,
         tflag: (reflect.tflag) 2,
         align: (uint8) 1,
         fieldAlign: (uint8) 1,
         kind: (uint8) 153,
         alg: (*reflect.typeAlg)(0x13bdd30)({
           hash: (func(unsafe.Pointer, uintptr) uintptr) 0x1001b60,
           equal: (func(unsafe.Pointer, unsafe.Pointer) bool) 0x1002360
         }),
         gcdata: (*uint8)(0x127a228)(1),
         str: (reflect.nameOff) 21559,
         ptrToThis: (reflect.typeOff) 118240
       }),
       Offset: (int64) 15,
       Struct: (string) "",
       Field: (string) (len=3) "cat"
     })

• pkg github.com/json-iterator/go

  • jsoniter.ConfigCompatibleWithStandardLibrary

    Err: struct { Cat struct {} "json:\"cat\"" }.Cat: skipObjectDecoder: expect object or null, error found in #8 byte of ...|{"cat": "sammy"}|..., bigger context ...|{"cat": "sammy"}|...

     (*errors.errorString)(0xc4200a5180)({
       s: (string) (len=178) "struct { Cat struct {} \"json:\\\"cat\\\"\" }.Cat: skipObjectDecoder: expect object or null, error found in #8 byte of ...|{\"cat\": \"sammy\"}|..., bigger context ...|{\"cat\": \"sammy\"}|..."
     })

• pkg github.com/koki/json

  • json.Unmarshal

    Err: $.cat: json: cannot unmarshal string into Go struct field .cat of type struct {}

     (*structurederrors.ErrorWithContext)(0xc4201381e0)({
       BaseError: (*json.UnmarshalTypeError)(0xc4200be550)({
         Value: (string) (len=6) "string",
         Type: (*reflect.rtype)(0x120fb20)({
           size: (uintptr) <nil>,
           ptrdata: (uintptr) <nil>,
           hash: (uint32) 670477339,
           tflag: (reflect.tflag) 2,
           align: (uint8) 1,
           fieldAlign: (uint8) 1,
           kind: (uint8) 153,
           alg: (*reflect.typeAlg)(0x13bdd30)({
             hash: (func(unsafe.Pointer, uintptr) uintptr) 0x1001b60,
             equal: (func(unsafe.Pointer, unsafe.Pointer) bool) 0x1002360
           }),
           gcdata: (*uint8)(0x127a228)(1),
           str: (reflect.nameOff) 21559,
           ptrToThis: (reflect.typeOff) 118240
         }),
         Offset: (int64) 15,
         Struct: (string) "",
         Field: (string) (len=3) "cat"
       }),
       Context: ([]string) (len=1 cap=1) {
         (string) (len=5) "$.cat"
       }
     })

  • json.UnmarshalMap

    Err: $.cat: json: cannot unmarshal string into Go struct field .cat of type struct {}

     (*structurederrors.ErrorWithContext)(0xc4201382d0)({
       BaseError: (*json.UnmarshalTypeError)(0xc4200be5a0)({
         Value: (string) (len=6) "string",
         Type: (*reflect.rtype)(0x120fb20)({
           size: (uintptr) <nil>,
           ptrdata: (uintptr) <nil>,
           hash: (uint32) 670477339,
           tflag: (reflect.tflag) 2,
           align: (uint8) 1,
           fieldAlign: (uint8) 1,
           kind: (uint8) 153,
           alg: (*reflect.typeAlg)(0x13bdd30)({
             hash: (func(unsafe.Pointer, uintptr) uintptr) 0x1001b60,
             equal: (func(unsafe.Pointer, unsafe.Pointer) bool) 0x1002360
           }),
           gcdata: (*uint8)(0x127a228)(1),
           str: (reflect.nameOff) 21559,
           ptrToThis: (reflect.typeOff) 118240
         }),
         Offset: (int64) 14,
         Struct: (string) "",
         Field: (string) (len=3) "cat"
       }),
       Context: ([]string) (len=1 cap=1) {
         (string) (len=5) "$.cat"
       }
     })

  • json.UnmarshalMap + jsonutil.ExtraneousFieldPaths

    Err: $.cat: json: cannot unmarshal string into Go struct field .cat of type struct {}

     (*structurederrors.ErrorWithContext)(0xc4201383c0)({
       BaseError: (*json.UnmarshalTypeError)(0xc4200be5f0)({
         Value: (string) (len=6) "string",
         Type: (*reflect.rtype)(0x120fb20)({
           size: (uintptr) <nil>,
           ptrdata: (uintptr) <nil>,
           hash: (uint32) 670477339,
           tflag: (reflect.tflag) 2,
           align: (uint8) 1,
           fieldAlign: (uint8) 1,
           kind: (uint8) 153,
           alg: (*reflect.typeAlg)(0x13bdd30)({
             hash: (func(unsafe.Pointer, uintptr) uintptr) 0x1001b60,
             equal: (func(unsafe.Pointer, unsafe.Pointer) bool) 0x1002360
           }),
           gcdata: (*uint8)(0x127a228)(1),
           str: (reflect.nameOff) 21559,
           ptrToThis: (reflect.typeOff) 118240
         }),
         Offset: (int64) 14,
         Struct: (string) "",
         Field: (string) (len=3) "cat"
       }),
       Context: ([]string) (len=1 cap=1) {
         (string) (len=5) "$.cat"
       }
     })