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// Package gjson provides searching for json strings.
package gjson
import (
"encoding/base64"
"encoding/json"
"errors"
"reflect"
"strconv"
"strings"
"sync"
"sync/atomic"
"time"
"unicode/utf16"
"unicode/utf8"
"github.com/tidwall/match"
"github.com/tidwall/pretty"
)
// Type is Result type
type Type int
const (
// Null is a null json value
Null Type = iota
// False is a json false boolean
False
// Number is json number
Number
// String is a json string
String
// True is a json true boolean
True
// JSON is a raw block of JSON
JSON
)
// String returns a string representation of the type.
func (t Type) String() string {
switch t {
default:
return ""
case Null:
return "Null"
case False:
return "False"
case Number:
return "Number"
case String:
return "String"
case True:
return "True"
case JSON:
return "JSON"
}
}
// Result represents a json value that is returned from Get().
type Result struct {
// Type is the json type
Type Type
// Raw is the raw json
Raw string
// Str is the json string
Str string
// Num is the json number
Num float64
// Index of raw value in original json, zero means index unknown
Index int
}
// String returns a string representation of the value.
func (t Result) String() string {
switch t.Type {
default:
return ""
case False:
return "false"
case Number:
if len(t.Raw) == 0 {
// calculated result
return strconv.FormatFloat(t.Num, 'f', -1, 64)
}
var i int
if t.Raw[0] == '-' {
i++
}
for ; i < len(t.Raw); i++ {
if t.Raw[i] < '0' || t.Raw[i] > '9' {
return strconv.FormatFloat(t.Num, 'f', -1, 64)
}
}
return t.Raw
case String:
return t.Str
case JSON:
return t.Raw
case True:
return "true"
}
}
// Bool returns an boolean representation.
func (t Result) Bool() bool {
switch t.Type {
default:
return false
case True:
return true
case String:
return t.Str != "" && t.Str != "0" && t.Str != "false"
case Number:
return t.Num != 0
}
}
// Int returns an integer representation.
func (t Result) Int() int64 {
switch t.Type {
default:
return 0
case True:
return 1
case String:
n, _ := parseInt(t.Str)
return n
case Number:
// try to directly convert the float64 to int64
n, ok := floatToInt(t.Num)
if !ok {
// now try to parse the raw string
n, ok = parseInt(t.Raw)
if !ok {
// fallback to a standard conversion
return int64(t.Num)
}
}
return n
}
}
// Uint returns an unsigned integer representation.
func (t Result) Uint() uint64 {
switch t.Type {
default:
return 0
case True:
return 1
case String:
n, _ := parseUint(t.Str)
return n
case Number:
// try to directly convert the float64 to uint64
n, ok := floatToUint(t.Num)
if !ok {
// now try to parse the raw string
n, ok = parseUint(t.Raw)
if !ok {
// fallback to a standard conversion
return uint64(t.Num)
}
}
return n
}
}
// Float returns an float64 representation.
func (t Result) Float() float64 {
switch t.Type {
default:
return 0
case True:
return 1
case String:
n, _ := strconv.ParseFloat(t.Str, 64)
return n
case Number:
return t.Num
}
}
// Time returns a time.Time representation.
func (t Result) Time() time.Time {
res, _ := time.Parse(time.RFC3339, t.String())
return res
}
// Array returns back an array of values.
// If the result represents a non-existent value, then an empty array will be
// returned. If the result is not a JSON array, the return value will be an
// array containing one result.
func (t Result) Array() []Result {
if t.Type == Null {
return []Result{}
}
if t.Type != JSON {
return []Result{t}
}
r := t.arrayOrMap('[', false)
return r.a
}
// IsObject returns true if the result value is a JSON object.
func (t Result) IsObject() bool {
return t.Type == JSON && len(t.Raw) > 0 && t.Raw[0] == '{'
}
// IsArray returns true if the result value is a JSON array.
func (t Result) IsArray() bool {
return t.Type == JSON && len(t.Raw) > 0 && t.Raw[0] == '['
}
// ForEach iterates through values.
// If the result represents a non-existent value, then no values will be
// iterated. If the result is an Object, the iterator will pass the key and
// value of each item. If the result is an Array, the iterator will only pass
// the value of each item. If the result is not a JSON array or object, the
// iterator will pass back one value equal to the result.
func (t Result) ForEach(iterator func(key, value Result) bool) {
if !t.Exists() {
return
}
if t.Type != JSON {
iterator(Result{}, t)
return
}
json := t.Raw
var keys bool
var i int
var key, value Result
for ; i < len(json); i++ {
if json[i] == '{' {
i++
key.Type = String
keys = true
break
} else if json[i] == '[' {
i++
break
}
if json[i] > ' ' {
return
}
}
var str string
var vesc bool
var ok bool
for ; i < len(json); i++ {
if keys {
if json[i] != '"' {
continue
}
s := i
i, str, vesc, ok = parseString(json, i+1)
if !ok {
return
}
if vesc {
key.Str = unescape(str[1 : len(str)-1])
} else {
key.Str = str[1 : len(str)-1]
}
key.Raw = str
key.Index = s
}
for ; i < len(json); i++ {
if json[i] <= ' ' || json[i] == ',' || json[i] == ':' {
continue
}
break
}
s := i
i, value, ok = parseAny(json, i, true)
if !ok {
return
}
value.Index = s
if !iterator(key, value) {
return
}
}
}
// Map returns back an map of values. The result should be a JSON array.
func (t Result) Map() map[string]Result {
if t.Type != JSON {
return map[string]Result{}
}
r := t.arrayOrMap('{', false)
return r.o
}
// Get searches result for the specified path.
// The result should be a JSON array or object.
func (t Result) Get(path string) Result {
return Get(t.Raw, path)
}
type arrayOrMapResult struct {
a []Result
ai []interface{}
o map[string]Result
oi map[string]interface{}
vc byte
}
func (t Result) arrayOrMap(vc byte, valueize bool) (r arrayOrMapResult) {
var json = t.Raw
var i int
var value Result
var count int
var key Result
if vc == 0 {
for ; i < len(json); i++ {
if json[i] == '{' || json[i] == '[' {
r.vc = json[i]
i++
break
}
if json[i] > ' ' {
goto end
}
}
} else {
for ; i < len(json); i++ {
if json[i] == vc {
i++
break
}
if json[i] > ' ' {
goto end
}
}
r.vc = vc
}
if r.vc == '{' {
if valueize {
r.oi = make(map[string]interface{})
} else {
r.o = make(map[string]Result)
}
} else {
if valueize {
r.ai = make([]interface{}, 0)
} else {
r.a = make([]Result, 0)
}
}
for ; i < len(json); i++ {
if json[i] <= ' ' {
continue
}
// get next value
if json[i] == ']' || json[i] == '}' {
break
}
switch json[i] {
default:
if (json[i] >= '0' && json[i] <= '9') || json[i] == '-' {
value.Type = Number
value.Raw, value.Num = tonum(json[i:])
value.Str = ""
} else {
continue
}
case '{', '[':
value.Type = JSON
value.Raw = squash(json[i:])
value.Str, value.Num = "", 0
case 'n':
value.Type = Null
value.Raw = tolit(json[i:])
value.Str, value.Num = "", 0
case 't':
value.Type = True
value.Raw = tolit(json[i:])
value.Str, value.Num = "", 0
case 'f':
value.Type = False
value.Raw = tolit(json[i:])
value.Str, value.Num = "", 0
case '"':
value.Type = String
value.Raw, value.Str = tostr(json[i:])
value.Num = 0
}
i += len(value.Raw) - 1
if r.vc == '{' {
if count%2 == 0 {
key = value
} else {
if valueize {
if _, ok := r.oi[key.Str]; !ok {
r.oi[key.Str] = value.Value()
}
} else {
if _, ok := r.o[key.Str]; !ok {
r.o[key.Str] = value
}
}
}
count++
} else {
if valueize {
r.ai = append(r.ai, value.Value())
} else {
r.a = append(r.a, value)
}
}
}
end:
return
}
// Parse parses the json and returns a result.
//
// This function expects that the json is well-formed, and does not validate.
// Invalid json will not panic, but it may return back unexpected results.
// If you are consuming JSON from an unpredictable source then you may want to
// use the Valid function first.
func Parse(json string) Result {
var value Result
for i := 0; i < len(json); i++ {
if json[i] == '{' || json[i] == '[' {
value.Type = JSON
value.Raw = json[i:] // just take the entire raw
break
}
if json[i] <= ' ' {
continue
}
switch json[i] {
default:
if (json[i] >= '0' && json[i] <= '9') || json[i] == '-' {
value.Type = Number
value.Raw, value.Num = tonum(json[i:])
} else {
return Result{}
}
case 'n':
value.Type = Null
value.Raw = tolit(json[i:])
case 't':
value.Type = True
value.Raw = tolit(json[i:])
case 'f':
value.Type = False
value.Raw = tolit(json[i:])
case '"':
value.Type = String
value.Raw, value.Str = tostr(json[i:])
}
break
}
return value
}
// ParseBytes parses the json and returns a result.
// If working with bytes, this method preferred over Parse(string(data))
func ParseBytes(json []byte) Result {
return Parse(string(json))
}
func squash(json string) string {
// expects that the lead character is a '[' or '{'
// squash the value, ignoring all nested arrays and objects.
// the first '[' or '{' has already been read
depth := 1
for i := 1; i < len(json); i++ {
if json[i] >= '"' && json[i] <= '}' {
switch json[i] {
case '"':
i++
s2 := i
for ; i < len(json); i++ {
if json[i] > '\\' {
continue
}
if json[i] == '"' {
// look for an escaped slash
if json[i-1] == '\\' {
n := 0
for j := i - 2; j > s2-1; j-- {
if json[j] != '\\' {
break
}
n++
}
if n%2 == 0 {
continue
}
}
break
}
}
case '{', '[':
depth++
case '}', ']':
depth--
if depth == 0 {
return json[:i+1]
}
}
}
}
return json
}
func tonum(json string) (raw string, num float64) {
for i := 1; i < len(json); i++ {
// less than dash might have valid characters
if json[i] <= '-' {
if json[i] <= ' ' || json[i] == ',' {
// break on whitespace and comma
raw = json[:i]
num, _ = strconv.ParseFloat(raw, 64)
return
}
// could be a '+' or '-'. let's assume so.
continue
}
if json[i] < ']' {
// probably a valid number
continue
}
if json[i] == 'e' || json[i] == 'E' {
// allow for exponential numbers
continue
}
// likely a ']' or '}'
raw = json[:i]
num, _ = strconv.ParseFloat(raw, 64)
return
}
raw = json
num, _ = strconv.ParseFloat(raw, 64)
return
}
func tolit(json string) (raw string) {
for i := 1; i < len(json); i++ {
if json[i] < 'a' || json[i] > 'z' {
return json[:i]
}
}
return json
}
func tostr(json string) (raw string, str string) {
// expects that the lead character is a '"'
for i := 1; i < len(json); i++ {
if json[i] > '\\' {
continue
}
if json[i] == '"' {
return json[:i+1], json[1:i]
}
if json[i] == '\\' {
i++
for ; i < len(json); i++ {
if json[i] > '\\' {
continue
}
if json[i] == '"' {
// look for an escaped slash
if json[i-1] == '\\' {
n := 0
for j := i - 2; j > 0; j-- {
if json[j] != '\\' {
break
}
n++
}
if n%2 == 0 {
continue
}
}
break
}
}
var ret string
if i+1 < len(json) {
ret = json[:i+1]
} else {
ret = json[:i]
}
return ret, unescape(json[1:i])
}
}
return json, json[1:]
}
// Exists returns true if value exists.
//
// if gjson.Get(json, "name.last").Exists(){
// println("value exists")
// }
func (t Result) Exists() bool {
return t.Type != Null || len(t.Raw) != 0
}
// Value returns one of these types:
//
// bool, for JSON booleans
// float64, for JSON numbers
// Number, for JSON numbers
// string, for JSON string literals
// nil, for JSON null
// map[string]interface{}, for JSON objects
// []interface{}, for JSON arrays
//
func (t Result) Value() interface{} {
if t.Type == String {
return t.Str
}
switch t.Type {
default:
return nil
case False:
return false
case Number:
return t.Num
case JSON:
r := t.arrayOrMap(0, true)
if r.vc == '{' {
return r.oi
} else if r.vc == '[' {
return r.ai
}
return nil
case True:
return true
}
}
func parseString(json string, i int) (int, string, bool, bool) {
var s = i
for ; i < len(json); i++ {
if json[i] > '\\' {
continue
}
if json[i] == '"' {
return i + 1, json[s-1 : i+1], false, true
}
if json[i] == '\\' {
i++
for ; i < len(json); i++ {
if json[i] > '\\' {
continue
}
if json[i] == '"' {
// look for an escaped slash
if json[i-1] == '\\' {
n := 0
for j := i - 2; j > 0; j-- {
if json[j] != '\\' {
break
}
n++
}
if n%2 == 0 {
continue
}
}
return i + 1, json[s-1 : i+1], true, true
}
}
break
}
}
return i, json[s-1:], false, false
}
func parseNumber(json string, i int) (int, string) {
var s = i
i++
for ; i < len(json); i++ {
if json[i] <= ' ' || json[i] == ',' || json[i] == ']' ||
json[i] == '}' {
return i, json[s:i]
}
}
return i, json[s:]
}
func parseLiteral(json string, i int) (int, string) {
var s = i
i++
for ; i < len(json); i++ {
if json[i] < 'a' || json[i] > 'z' {
return i, json[s:i]
}
}
return i, json[s:]
}
type arrayPathResult struct {
part string
path string
pipe string
piped bool
more bool
alogok bool
arrch bool
alogkey string
query struct {
on bool
path string
op string
value string
all bool
}
}
func parseArrayPath(path string) (r arrayPathResult) {
for i := 0; i < len(path); i++ {
if path[i] == '|' {
r.part = path[:i]
r.pipe = path[i+1:]
r.piped = true
return
}
if path[i] == '.' {
r.part = path[:i]
r.path = path[i+1:]
r.more = true
return
}
if path[i] == '#' {
r.arrch = true
if i == 0 && len(path) > 1 {
if path[1] == '.' {
r.alogok = true
r.alogkey = path[2:]
r.path = path[:1]
} else if path[1] == '[' || path[1] == '(' {
// query
r.query.on = true
if true {
qpath, op, value, _, fi, ok := parseQuery(path[i:])
if !ok {
// bad query, end now
break
}
r.query.path = qpath
r.query.op = op
r.query.value = value
i = fi - 1
if i+1 < len(path) && path[i+1] == '#' {
r.query.all = true
}
} else {
var end byte
if path[1] == '[' {
end = ']'
} else {
end = ')'
}
i += 2
// whitespace
for ; i < len(path); i++ {
if path[i] > ' ' {
break
}
}
s := i
for ; i < len(path); i++ {
if path[i] <= ' ' ||
path[i] == '!' ||
path[i] == '=' ||
path[i] == '<' ||
path[i] == '>' ||
path[i] == '%' ||
path[i] == end {
break
}
}
r.query.path = path[s:i]
// whitespace
for ; i < len(path); i++ {
if path[i] > ' ' {
break
}
}
if i < len(path) {
s = i
if path[i] == '!' {
if i < len(path)-1 && (path[i+1] == '=' ||
path[i+1] == '%') {
i++
}
} else if path[i] == '<' || path[i] == '>' {
if i < len(path)-1 && path[i+1] == '=' {
i++
}
} else if path[i] == '=' {
if i < len(path)-1 && path[i+1] == '=' {
s++
i++
}
}
i++
r.query.op = path[s:i]
// whitespace
for ; i < len(path); i++ {
if path[i] > ' ' {
break
}
}
s = i
for ; i < len(path); i++ {
if path[i] == '"' {
i++
s2 := i
for ; i < len(path); i++ {
if path[i] > '\\' {
continue
}
if path[i] == '"' {
// look for an escaped slash
if path[i-1] == '\\' {
n := 0
for j := i - 2; j > s2-1; j-- {
if path[j] != '\\' {
break
}
n++
}
if n%2 == 0 {
continue
}
}
break
}
}
} else if path[i] == end {
if i+1 < len(path) && path[i+1] == '#' {
r.query.all = true
}
break
}
}
if i > len(path) {
i = len(path)
}
v := path[s:i]
for len(v) > 0 && v[len(v)-1] <= ' ' {
v = v[:len(v)-1]
}
r.query.value = v
}
}
}
}
continue
}
}
r.part = path
r.path = ""
return
}
// splitQuery takes a query and splits it into three parts:
// path, op, middle, and right.
// So for this query:
// #(first_name=="Murphy").last
// Becomes
// first_name # path
// =="Murphy" # middle
// .last # right
// Or,
// #(service_roles.#(=="one")).cap
// Becomes
// service_roles.#(=="one") # path
// # middle
// .cap # right
func parseQuery(query string) (
path, op, value, remain string, i int, ok bool,
) {
if len(query) < 2 || query[0] != '#' ||
(query[1] != '(' && query[1] != '[') {
return "", "", "", "", i, false
}
i = 2
j := 0 // start of value part
depth := 1
for ; i < len(query); i++ {
if depth == 1 && j == 0 {
switch query[i] {
case '!', '=', '<', '>', '%':
// start of the value part
j = i
continue
}
}
if query[i] == '\\' {
i++
} else if query[i] == '[' || query[i] == '(' {
depth++
} else if query[i] == ']' || query[i] == ')' {
depth--
if depth == 0 {
break
}
} else if query[i] == '"' {
// inside selector string, balance quotes
i++
for ; i < len(query); i++ {
if query[i] == '\\' {
i++
} else if query[i] == '"' {
break
}
}
}
}
if depth > 0 {
return "", "", "", "", i, false
}
if j > 0 {
path = trim(query[2:j])
value = trim(query[j:i])
remain = query[i+1:]
// parse the compare op from the value
var opsz int
switch {
case len(value) == 1:
opsz = 1
case value[0] == '!' && value[1] == '=':
opsz = 2
case value[0] == '!' && value[1] == '%':
opsz = 2
case value[0] == '<' && value[1] == '=':
opsz = 2
case value[0] == '>' && value[1] == '=':
opsz = 2
case value[0] == '=' && value[1] == '=':
value = value[1:]
opsz = 1
case value[0] == '<':
opsz = 1
case value[0] == '>':
opsz = 1
case value[0] == '=':
opsz = 1
case value[0] == '%':
opsz = 1
}
op = value[:opsz]
value = trim(value[opsz:])
} else {
path = trim(query[2:i])
remain = query[i+1:]
}
return path, op, value, remain, i + 1, true
}
func trim(s string) string {
left:
if len(s) > 0 && s[0] <= ' ' {
s = s[1:]
goto left
}
right:
if len(s) > 0 && s[len(s)-1] <= ' ' {
s = s[:len(s)-1]
goto right
}
return s
}
type objectPathResult struct {
part string
path string
pipe string
piped bool
wild bool
more bool
}
func parseObjectPath(path string) (r objectPathResult) {
for i := 0; i < len(path); i++ {
if path[i] == '|' {
r.part = path[:i]
r.pipe = path[i+1:]
r.piped = true
return
}
if path[i] == '.' {
// peek at the next byte and see if it's a '@', '[', or '{'.
r.part = path[:i]
if !DisableModifiers &&
i < len(path)-1 &&
(path[i+1] == '@' ||
path[i+1] == '[' || path[i+1] == '{') {
r.pipe = path[i+1:]
r.piped = true
} else {
r.path = path[i+1:]
r.more = true
}
return
}
if path[i] == '*' || path[i] == '?' {
r.wild = true
continue
}
if path[i] == '\\' {
// go into escape mode. this is a slower path that
// strips off the escape character from the part.
epart := []byte(path[:i])
i++
if i < len(path) {
epart = append(epart, path[i])
i++
for ; i < len(path); i++ {
if path[i] == '\\' {
i++
if i < len(path) {
epart = append(epart, path[i])
}
continue
} else if path[i] == '.' {
r.part = string(epart)
// peek at the next byte and see if it's a '@' modifier
if !DisableModifiers &&
i < len(path)-1 && path[i+1] == '@' {
r.pipe = path[i+1:]
r.piped = true
} else {
r.path = path[i+1:]
r.more = true
}
r.more = true
return
} else if path[i] == '|' {
r.part = string(epart)
r.pipe = path[i+1:]
r.piped = true
return
} else if path[i] == '*' || path[i] == '?' {
r.wild = true
}
epart = append(epart, path[i])
}
}
// append the last part
r.part = string(epart)
return
}
}
r.part = path
return
}
func parseSquash(json string, i int) (int, string) {
// expects that the lead character is a '[' or '{'
// squash the value, ignoring all nested arrays and objects.
// the first '[' or '{' has already been read
s := i
i++
depth := 1
for ; i < len(json); i++ {
if json[i] >= '"' && json[i] <= '}' {
switch json[i] {
case '"':
i++
s2 := i
for ; i < len(json); i++ {
if json[i] > '\\' {
continue
}
if json[i] == '"' {
// look for an escaped slash
if json[i-1] == '\\' {
n := 0
for j := i - 2; j > s2-1; j-- {
if json[j] != '\\' {
break
}
n++
}
if n%2 == 0 {
continue
}
}
break
}
}
case '{', '[':
depth++
case '}', ']':
depth--
if depth == 0 {
i++
return i, json[s:i]
}
}
}
}
return i, json[s:]
}
func parseObject(c *parseContext, i int, path string) (int, bool) {
var pmatch, kesc, vesc, ok, hit bool
var key, val string
rp := parseObjectPath(path)
if !rp.more && rp.piped {
c.pipe = rp.pipe
c.piped = true
}
for i < len(c.json) {
for ; i < len(c.json); i++ {
if c.json[i] == '"' {
// parse_key_string
// this is slightly different from getting s string value
// because we don't need the outer quotes.
i++
var s = i
for ; i < len(c.json); i++ {
if c.json[i] > '\\' {
continue
}
if c.json[i] == '"' {
i, key, kesc, ok = i+1, c.json[s:i], false, true
goto parse_key_string_done
}
if c.json[i] == '\\' {
i++
for ; i < len(c.json); i++ {
if c.json[i] > '\\' {
continue
}
if c.json[i] == '"' {
// look for an escaped slash
if c.json[i-1] == '\\' {
n := 0
for j := i - 2; j > 0; j-- {
if c.json[j] != '\\' {
break
}
n++
}
if n%2 == 0 {
continue
}
}
i, key, kesc, ok = i+1, c.json[s:i], true, true
goto parse_key_string_done
}
}
break
}
}
key, kesc, ok = c.json[s:], false, false
parse_key_string_done:
break
}
if c.json[i] == '}' {
return i + 1, false
}
}
if !ok {
return i, false
}
if rp.wild {
if kesc {
pmatch = match.Match(unescape(key), rp.part)
} else {
pmatch = match.Match(key, rp.part)
}
} else {
if kesc {
pmatch = rp.part == unescape(key)
} else {
pmatch = rp.part == key
}
}
hit = pmatch && !rp.more
for ; i < len(c.json); i++ {
switch c.json[i] {
default:
continue
case '"':
i++
i, val, vesc, ok = parseString(c.json, i)
if !ok {
return i, false
}
if hit {
if vesc {
c.value.Str = unescape(val[1 : len(val)-1])
} else {
c.value.Str = val[1 : len(val)-1]
}
c.value.Raw = val
c.value.Type = String
return i, true
}
case '{':
if pmatch && !hit {
i, hit = parseObject(c, i+1, rp.path)
if hit {
return i, true
}
} else {
i, val = parseSquash(c.json, i)
if hit {
c.value.Raw = val
c.value.Type = JSON
return i, true
}
}
case '[':
if pmatch && !hit {
i, hit = parseArray(c, i+1, rp.path)
if hit {
return i, true
}
} else {
i, val = parseSquash(c.json, i)
if hit {
c.value.Raw = val
c.value.Type = JSON
return i, true
}
}
case '-', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9':
i, val = parseNumber(c.json, i)
if hit {
c.value.Raw = val
c.value.Type = Number
c.value.Num, _ = strconv.ParseFloat(val, 64)
return i, true
}
case 't', 'f', 'n':
vc := c.json[i]
i, val = parseLiteral(c.json, i)
if hit {
c.value.Raw = val
switch vc {
case 't':
c.value.Type = True
case 'f':
c.value.Type = False
}
return i, true
}
}
break
}
}
return i, false
}
func queryMatches(rp *arrayPathResult, value Result) bool {
rpv := rp.query.value
if len(rpv) > 2 && rpv[0] == '"' && rpv[len(rpv)-1] == '"' {
rpv = rpv[1 : len(rpv)-1]
}
if !value.Exists() {
return false
}
if rp.query.op == "" {
// the query is only looking for existence, such as:
// friends.#(name)
// which makes sure that the array "friends" has an element of
// "name" that exists
return true
}
switch value.Type {
case String:
switch rp.query.op {
case "=":
return value.Str == rpv
case "!=":
return value.Str != rpv
case "<":
return value.Str < rpv
case "<=":
return value.Str <= rpv
case ">":
return value.Str > rpv
case ">=":
return value.Str >= rpv
case "%":
return match.Match(value.Str, rpv)
case "!%":
return !match.Match(value.Str, rpv)
}
case Number:
rpvn, _ := strconv.ParseFloat(rpv, 64)
switch rp.query.op {
case "=":
return value.Num == rpvn
case "!=":
return value.Num != rpvn
case "<":
return value.Num < rpvn
case "<=":
return value.Num <= rpvn
case ">":
return value.Num > rpvn
case ">=":
return value.Num >= rpvn
}
case True:
switch rp.query.op {
case "=":
return rpv == "true"
case "!=":
return rpv != "true"
case ">":
return rpv == "false"
case ">=":
return true
}
case False:
switch rp.query.op {
case "=":
return rpv == "false"
case "!=":
return rpv != "false"
case "<":
return rpv == "true"
case "<=":
return true
}
}
return false
}
func parseArray(c *parseContext, i int, path string) (int, bool) {
var pmatch, vesc, ok, hit bool
var val string
var h int
var alog []int
var partidx int
var multires []byte
rp := parseArrayPath(path)
if !rp.arrch {
n, ok := parseUint(rp.part)
if !ok {
partidx = -1
} else {
partidx = int(n)
}
}
if !rp.more && rp.piped {
c.pipe = rp.pipe
c.piped = true
}
procQuery := func(qval Result) bool {
if rp.query.all {
if len(multires) == 0 {
multires = append(multires, '[')
}
}
var res Result
if qval.Type == JSON {
res = qval.Get(rp.query.path)
} else {
if rp.query.path != "" {
return false
}
res = qval
}
if queryMatches(&rp, res) {
if rp.more {
left, right, ok := splitPossiblePipe(rp.path)
if ok {
rp.path = left
c.pipe = right
c.piped = true
}
res = qval.Get(rp.path)
} else {
res = qval
}
if rp.query.all {
raw := res.Raw
if len(raw) == 0 {
raw = res.String()
}
if raw != "" {
if len(multires) > 1 {
multires = append(multires, ',')
}
multires = append(multires, raw...)
}
} else {
c.value = res
return true
}
}
return false
}
for i < len(c.json)+1 {
if !rp.arrch {
pmatch = partidx == h
hit = pmatch && !rp.more
}
h++
if rp.alogok {
alog = append(alog, i)
}
for ; ; i++ {
var ch byte
if i > len(c.json) {
break
} else if i == len(c.json) {
ch = ']'
} else {
ch = c.json[i]
}
switch ch {
default:
continue
case '"':
i++
i, val, vesc, ok = parseString(c.json, i)
if !ok {
return i, false
}
if rp.query.on {
var qval Result
if vesc {
qval.Str = unescape(val[1 : len(val)-1])
} else {
qval.Str = val[1 : len(val)-1]
}
qval.Raw = val
qval.Type = String
if procQuery(qval) {
return i, true
}
} else if hit {
if rp.alogok {
break
}
if vesc {
c.value.Str = unescape(val[1 : len(val)-1])
} else {
c.value.Str = val[1 : len(val)-1]
}
c.value.Raw = val
c.value.Type = String
return i, true
}
case '{':
if pmatch && !hit {
i, hit = parseObject(c, i+1, rp.path)
if hit {
if rp.alogok {
break
}
return i, true
}
} else {
i, val = parseSquash(c.json, i)
if rp.query.on {
if procQuery(Result{Raw: val, Type: JSON}) {
return i, true
}
} else if hit {
if rp.alogok {
break
}
c.value.Raw = val
c.value.Type = JSON
return i, true
}
}
case '[':
if pmatch && !hit {
i, hit = parseArray(c, i+1, rp.path)
if hit {
if rp.alogok {
break
}
return i, true
}
} else {
i, val = parseSquash(c.json, i)
if rp.query.on {
if procQuery(Result{Raw: val, Type: JSON}) {
return i, true
}
} else if hit {
if rp.alogok {
break
}
c.value.Raw = val
c.value.Type = JSON
return i, true
}
}
case '-', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9':
i, val = parseNumber(c.json, i)
if rp.query.on {
var qval Result
qval.Raw = val
qval.Type = Number
qval.Num, _ = strconv.ParseFloat(val, 64)
if procQuery(qval) {
return i, true
}
} else if hit {
if rp.alogok {
break
}
c.value.Raw = val
c.value.Type = Number
c.value.Num, _ = strconv.ParseFloat(val, 64)
return i, true
}
case 't', 'f', 'n':
vc := c.json[i]
i, val = parseLiteral(c.json, i)
if rp.query.on {
var qval Result
qval.Raw = val
switch vc {
case 't':
qval.Type = True
case 'f':
qval.Type = False
}
if procQuery(qval) {
return i, true
}
} else if hit {
if rp.alogok {
break
}
c.value.Raw = val
switch vc {
case 't':
c.value.Type = True
case 'f':
c.value.Type = False
}
return i, true
}
case ']':
if rp.arrch && rp.part == "#" {
if rp.alogok {
left, right, ok := splitPossiblePipe(rp.alogkey)
if ok {
rp.alogkey = left
c.pipe = right
c.piped = true
}
var jsons = make([]byte, 0, 64)
jsons = append(jsons, '[')
for j, k := 0, 0; j < len(alog); j++ {
_, res, ok := parseAny(c.json, alog[j], true)
if ok {
res := res.Get(rp.alogkey)
if res.Exists() {
if k > 0 {
jsons = append(jsons, ',')
}
raw := res.Raw
if len(raw) == 0 {
raw = res.String()
}
jsons = append(jsons, []byte(raw)...)
k++
}
}
}
jsons = append(jsons, ']')
c.value.Type = JSON
c.value.Raw = string(jsons)
return i + 1, true
}
if rp.alogok {
break
}
c.value.Type = Number
c.value.Num = float64(h - 1)
c.value.Raw = strconv.Itoa(h - 1)
c.calcd = true
return i + 1, true
}
if len(multires) > 0 && !c.value.Exists() {
c.value = Result{
Raw: string(append(multires, ']')),
Type: JSON,
}
}
return i + 1, false
}
break
}
}
return i, false
}
func splitPossiblePipe(path string) (left, right string, ok bool) {
// take a quick peek for the pipe character. If found we'll split the piped
// part of the path into the c.pipe field and shorten the rp.
var possible bool
for i := 0; i < len(path); i++ {
if path[i] == '|' {
possible = true
break
}
}
if !possible {
return
}
// split the left and right side of the path with the pipe character as
// the delimiter. This is a little tricky because we'll need to basically
// parse the entire path.
for i := 0; i < len(path); i++ {
if path[i] == '\\' {
i++
} else if path[i] == '.' {
if i == len(path)-1 {
return
}
if path[i+1] == '#' {
i += 2
if i == len(path) {
return
}
if path[i] == '[' || path[i] == '(' {
var start, end byte
if path[i] == '[' {
start, end = '[', ']'
} else {
start, end = '(', ')'
}
// inside selector, balance brackets
i++
depth := 1
for ; i < len(path); i++ {
if path[i] == '\\' {
i++
} else if path[i] == start {
depth++
} else if path[i] == end {
depth--
if depth == 0 {
break
}
} else if path[i] == '"' {
// inside selector string, balance quotes
i++
for ; i < len(path); i++ {
if path[i] == '\\' {
i++
} else if path[i] == '"' {
break
}
}
}
}
}
}
} else if path[i] == '|' {
return path[:i], path[i+1:], true
}
}
return
}
// ForEachLine iterates through lines of JSON as specified by the JSON Lines
// format (http://jsonlines.org/).
// Each line is returned as a GJSON Result.
func ForEachLine(json string, iterator func(line Result) bool) {
var res Result
var i int
for {
i, res, _ = parseAny(json, i, true)
if !res.Exists() {
break
}
if !iterator(res) {
return
}
}
}
type subSelector struct {
name string
path string
}
// parseSubSelectors returns the subselectors belonging to a '[path1,path2]' or
// '{"field1":path1,"field2":path2}' type subSelection. It's expected that the
// first character in path is either '[' or '{', and has already been checked
// prior to calling this function.
func parseSubSelectors(path string) (sels []subSelector, out string, ok bool) {
depth := 1
colon := 0
start := 1
i := 1
pushSel := func() {
var sel subSelector
if colon == 0 {
sel.path = path[start:i]
} else {
sel.name = path[start:colon]
sel.path = path[colon+1 : i]
}
sels = append(sels, sel)
colon = 0
start = i + 1
}
for ; i < len(path); i++ {
switch path[i] {
case '\\':
i++
case ':':
if depth == 1 {
colon = i
}
case ',':
if depth == 1 {
pushSel()
}
case '"':
i++
loop:
for ; i < len(path); i++ {
switch path[i] {
case '\\':
i++
case '"':
break loop
}
}
case '[', '(', '{':
depth++
case ']', ')', '}':
depth--
if depth == 0 {
pushSel()
path = path[i+1:]
return sels, path, true
}
}
}
return
}
// nameOfLast returns the name of the last component
func nameOfLast(path string) string {
for i := len(path) - 1; i >= 0; i-- {
if path[i] == '|' || path[i] == '.' {
if i > 0 {
if path[i-1] == '\\' {
continue
}
}
return path[i+1:]
}
}
return path
}
func isSimpleName(component string) bool {
for i := 0; i < len(component); i++ {
if component[i] < ' ' {
return false
}
switch component[i] {
case '[', ']', '{', '}', '(', ')', '#', '|':
return false
}
}
return true
}
func appendJSONString(dst []byte, s string) []byte {
for i := 0; i < len(s); i++ {
if s[i] < ' ' || s[i] == '\\' || s[i] == '"' || s[i] > 126 {
d, _ := json.Marshal(s)
return append(dst, string(d)...)
}
}
dst = append(dst, '"')
dst = append(dst, s...)
dst = append(dst, '"')
return dst
}
type parseContext struct {
json string
value Result
pipe string
piped bool
calcd bool
lines bool
}
// Get searches json for the specified path.
// A path is in dot syntax, such as "name.last" or "age".
// When the value is found it's returned immediately.
//
// A path is a series of keys searated by a dot.
// A key may contain special wildcard characters '*' and '?'.
// To access an array value use the index as the key.
// To get the number of elements in an array or to access a child path, use
// the '#' character.
// The dot and wildcard character can be escaped with '\'.
//
// {
// "name": {"first": "Tom", "last": "Anderson"},
// "age":37,
// "children": ["Sara","Alex","Jack"],
// "friends": [
// {"first": "James", "last": "Murphy"},
// {"first": "Roger", "last": "Craig"}
// ]
// }
// "name.last" >> "Anderson"
// "age" >> 37
// "children" >> ["Sara","Alex","Jack"]
// "children.#" >> 3
// "children.1" >> "Alex"
// "child*.2" >> "Jack"
// "c?ildren.0" >> "Sara"
// "friends.#.first" >> ["James","Roger"]
//
// This function expects that the json is well-formed, and does not validate.
// Invalid json will not panic, but it may return back unexpected results.
// If you are consuming JSON from an unpredictable source then you may want to
// use the Valid function first.
func Get(json, path string) Result {
if len(path) > 1 {
if !DisableModifiers {
if path[0] == '@' {
// possible modifier
var ok bool
var npath string
var rjson string
npath, rjson, ok = execModifier(json, path)
if ok {
path = npath
if len(path) > 0 && (path[0] == '|' || path[0] == '.') {
res := Get(rjson, path[1:])
res.Index = 0
return res
}
return Parse(rjson)
}
}
}
if path[0] == '[' || path[0] == '{' {
// using a subselector path
kind := path[0]
var ok bool
var subs []subSelector
subs, path, ok = parseSubSelectors(path)
if ok {
if len(path) == 0 || (path[0] == '|' || path[0] == '.') {
var b []byte
b = append(b, kind)
var i int
for _, sub := range subs {
res := Get(json, sub.path)
if res.Exists() {
if i > 0 {
b = append(b, ',')
}
if kind == '{' {
if len(sub.name) > 0 {
if sub.name[0] == '"' && Valid(sub.name) {
b = append(b, sub.name...)
} else {
b = appendJSONString(b, sub.name)
}
} else {
last := nameOfLast(sub.path)
if isSimpleName(last) {
b = appendJSONString(b, last)
} else {
b = appendJSONString(b, "_")
}
}
b = append(b, ':')
}
var raw string
if len(res.Raw) == 0 {
raw = res.String()
if len(raw) == 0 {
raw = "null"
}
} else {
raw = res.Raw
}
b = append(b, raw...)
i++
}
}
b = append(b, kind+2)
var res Result
res.Raw = string(b)
res.Type = JSON
if len(path) > 0 {
res = res.Get(path[1:])
}
res.Index = 0
return res
}
}
}
}
var i int
var c = &parseContext{json: json}
if len(path) >= 2 && path[0] == '.' && path[1] == '.' {
c.lines = true
parseArray(c, 0, path[2:])
} else {
for ; i < len(c.json); i++ {
if c.json[i] == '{' {
i++
parseObject(c, i, path)
break
}
if c.json[i] == '[' {
i++
parseArray(c, i, path)
break
}
}
}
if c.piped {
res := c.value.Get(c.pipe)
res.Index = 0
return res
}
fillIndex(json, c)
return c.value
}
// GetBytes searches json for the specified path.
// If working with bytes, this method preferred over Get(string(data), path)
func GetBytes(json []byte, path string) Result {
return getBytes(json, path)
}
// runeit returns the rune from the the \uXXXX
func runeit(json string) rune {
n, _ := strconv.ParseUint(json[:4], 16, 64)
return rune(n)
}
// unescape unescapes a string
func unescape(json string) string { //, error) {
var str = make([]byte, 0, len(json))
for i := 0; i < len(json); i++ {
switch {
default:
str = append(str, json[i])
case json[i] < ' ':
return string(str)
case json[i] == '\\':
i++
if i >= len(json) {
return string(str)
}
switch json[i] {
default:
return string(str)
case '\\':
str = append(str, '\\')
case '/':
str = append(str, '/')
case 'b':
str = append(str, '\b')
case 'f':
str = append(str, '\f')
case 'n':
str = append(str, '\n')
case 'r':
str = append(str, '\r')
case 't':
str = append(str, '\t')
case '"':
str = append(str, '"')
case 'u':
if i+5 > len(json) {
return string(str)
}
r := runeit(json[i+1:])
i += 5
if utf16.IsSurrogate(r) {
// need another code
if len(json[i:]) >= 6 && json[i] == '\\' &&
json[i+1] == 'u' {
// we expect it to be correct so just consume it
r = utf16.DecodeRune(r, runeit(json[i+2:]))
i += 6
}
}
// provide enough space to encode the largest utf8 possible
str = append(str, 0, 0, 0, 0, 0, 0, 0, 0)
n := utf8.EncodeRune(str[len(str)-8:], r)
str = str[:len(str)-8+n]
i-- // backtrack index by one
}
}
}
return string(str)
}
// Less return true if a token is less than another token.
// The caseSensitive paramater is used when the tokens are Strings.
// The order when comparing two different type is:
//
// Null < False < Number < String < True < JSON
//
func (t Result) Less(token Result, caseSensitive bool) bool {
if t.Type < token.Type {
return true
}
if t.Type > token.Type {
return false
}
if t.Type == String {
if caseSensitive {
return t.Str < token.Str
}
return stringLessInsensitive(t.Str, token.Str)
}
if t.Type == Number {
return t.Num < token.Num
}
return t.Raw < token.Raw
}
func stringLessInsensitive(a, b string) bool {
for i := 0; i < len(a) && i < len(b); i++ {
if a[i] >= 'A' && a[i] <= 'Z' {
if b[i] >= 'A' && b[i] <= 'Z' {
// both are uppercase, do nothing
if a[i] < b[i] {
return true
} else if a[i] > b[i] {
return false
}
} else {
// a is uppercase, convert a to lowercase
if a[i]+32 < b[i] {
return true
} else if a[i]+32 > b[i] {
return false
}
}
} else if b[i] >= 'A' && b[i] <= 'Z' {
// b is uppercase, convert b to lowercase
if a[i] < b[i]+32 {
return true
} else if a[i] > b[i]+32 {
return false
}
} else {
// neither are uppercase
if a[i] < b[i] {
return true
} else if a[i] > b[i] {
return false
}
}
}
return len(a) < len(b)
}
// parseAny parses the next value from a json string.
// A Result is returned when the hit param is set.
// The return values are (i int, res Result, ok bool)
func parseAny(json string, i int, hit bool) (int, Result, bool) {
var res Result
var val string
for ; i < len(json); i++ {
if json[i] == '{' || json[i] == '[' {
i, val = parseSquash(json, i)
if hit {
res.Raw = val
res.Type = JSON
}
return i, res, true
}
if json[i] <= ' ' {
continue
}
switch json[i] {
case '"':
i++
var vesc bool
var ok bool
i, val, vesc, ok = parseString(json, i)
if !ok {
return i, res, false
}
if hit {
res.Type = String
res.Raw = val
if vesc {
res.Str = unescape(val[1 : len(val)-1])
} else {
res.Str = val[1 : len(val)-1]
}
}
return i, res, true
case '-', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9':
i, val = parseNumber(json, i)
if hit {
res.Raw = val
res.Type = Number
res.Num, _ = strconv.ParseFloat(val, 64)
}
return i, res, true
case 't', 'f', 'n':
vc := json[i]
i, val = parseLiteral(json, i)
if hit {
res.Raw = val
switch vc {
case 't':
res.Type = True
case 'f':
res.Type = False
}
return i, res, true
}
}
}
return i, res, false
}
var ( // used for testing
testWatchForFallback bool
testLastWasFallback bool
)
// GetMany searches json for the multiple paths.
// The return value is a Result array where the number of items
// will be equal to the number of input paths.
func GetMany(json string, path ...string) []Result {
res := make([]Result, len(path))
for i, path := range path {
res[i] = Get(json, path)
}
return res
}
// GetManyBytes searches json for the multiple paths.
// The return value is a Result array where the number of items
// will be equal to the number of input paths.
func GetManyBytes(json []byte, path ...string) []Result {
res := make([]Result, len(path))
for i, path := range path {
res[i] = GetBytes(json, path)
}
return res
}
var fieldsmu sync.RWMutex
var fields = make(map[string]map[string]int)
func assign(jsval Result, goval reflect.Value) {
if jsval.Type == Null {
return
}
switch goval.Kind() {
default:
case reflect.Ptr:
if !goval.IsNil() {
newval := reflect.New(goval.Elem().Type())
assign(jsval, newval.Elem())
goval.Elem().Set(newval.Elem())
} else {
newval := reflect.New(goval.Type().Elem())
assign(jsval, newval.Elem())
goval.Set(newval)
}
case reflect.Struct:
fieldsmu.RLock()
sf := fields[goval.Type().String()]
fieldsmu.RUnlock()
if sf == nil {
fieldsmu.Lock()
sf = make(map[string]int)
for i := 0; i < goval.Type().NumField(); i++ {
f := goval.Type().Field(i)
tag := strings.Split(f.Tag.Get("json"), ",")[0]
if tag != "-" {
if tag != "" {
sf[tag] = i
sf[f.Name] = i
} else {
sf[f.Name] = i
}
}
}
fields[goval.Type().String()] = sf
fieldsmu.Unlock()
}
jsval.ForEach(func(key, value Result) bool {
if idx, ok := sf[key.Str]; ok {
f := goval.Field(idx)
if f.CanSet() {
assign(value, f)
}
}
return true
})
case reflect.Slice:
if goval.Type().Elem().Kind() == reflect.Uint8 &&
jsval.Type == String {
data, _ := base64.StdEncoding.DecodeString(jsval.String())
goval.Set(reflect.ValueOf(data))
} else {
jsvals := jsval.Array()
slice := reflect.MakeSlice(goval.Type(), len(jsvals), len(jsvals))
for i := 0; i < len(jsvals); i++ {
assign(jsvals[i], slice.Index(i))
}
goval.Set(slice)
}
case reflect.Array:
i, n := 0, goval.Len()
jsval.ForEach(func(_, value Result) bool {
if i == n {
return false
}
assign(value, goval.Index(i))
i++
return true
})
case reflect.Map:
if goval.Type().Key().Kind() == reflect.String &&
goval.Type().Elem().Kind() == reflect.Interface {
goval.Set(reflect.ValueOf(jsval.Value()))
}
case reflect.Interface:
goval.Set(reflect.ValueOf(jsval.Value()))
case reflect.Bool:
goval.SetBool(jsval.Bool())
case reflect.Float32, reflect.Float64:
goval.SetFloat(jsval.Float())
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32,
reflect.Int64:
goval.SetInt(jsval.Int())
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32,
reflect.Uint64:
goval.SetUint(jsval.Uint())
case reflect.String:
goval.SetString(jsval.String())
}
if len(goval.Type().PkgPath()) > 0 {
v := goval.Addr()
if v.Type().NumMethod() > 0 {
if u, ok := v.Interface().(json.Unmarshaler); ok {
u.UnmarshalJSON([]byte(jsval.Raw))
}
}
}
}
var validate uintptr = 1
// UnmarshalValidationEnabled provides the option to disable JSON validation
// during the Unmarshal routine. Validation is enabled by default.
//
// Deprecated: Use encoder/json.Unmarshal instead
func UnmarshalValidationEnabled(enabled bool) {
if enabled {
atomic.StoreUintptr(&validate, 1)
} else {
atomic.StoreUintptr(&validate, 0)
}
}
// Unmarshal loads the JSON data into the value pointed to by v.
//
// This function works almost identically to json.Unmarshal except that
// gjson.Unmarshal will automatically attempt to convert JSON values to any Go
// type. For example, the JSON string "100" or the JSON number 100 can be
// equally assigned to Go string, int, byte, uint64, etc. This rule applies to
// all types.
//
// Deprecated: Use encoder/json.Unmarshal instead
func Unmarshal(data []byte, v interface{}) error {
if atomic.LoadUintptr(&validate) == 1 {
_, ok := validpayload(data, 0)
if !ok {
return errors.New("invalid json")
}
}
if v := reflect.ValueOf(v); v.Kind() == reflect.Ptr {
assign(ParseBytes(data), v)
}
return nil
}
func validpayload(data []byte, i int) (outi int, ok bool) {
for ; i < len(data); i++ {
switch data[i] {
default:
i, ok = validany(data, i)
if !ok {
return i, false
}
for ; i < len(data); i++ {
switch data[i] {
default:
return i, false
case ' ', '\t', '\n', '\r':
continue
}
}
return i, true
case ' ', '\t', '\n', '\r':
continue
}
}
return i, false
}
func validany(data []byte, i int) (outi int, ok bool) {
for ; i < len(data); i++ {
switch data[i] {
default:
return i, false
case ' ', '\t', '\n', '\r':
continue
case '{':
return validobject(data, i+1)
case '[':
return validarray(data, i+1)
case '"':
return validstring(data, i+1)
case '-', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9':
return validnumber(data, i+1)
case 't':
return validtrue(data, i+1)
case 'f':
return validfalse(data, i+1)
case 'n':
return validnull(data, i+1)
}
}
return i, false
}
func validobject(data []byte, i int) (outi int, ok bool) {
for ; i < len(data); i++ {
switch data[i] {
default:
return i, false
case ' ', '\t', '\n', '\r':
continue
case '}':
return i + 1, true
case '"':
key:
if i, ok = validstring(data, i+1); !ok {
return i, false
}
if i, ok = validcolon(data, i); !ok {
return i, false
}
if i, ok = validany(data, i); !ok {
return i, false
}
if i, ok = validcomma(data, i, '}'); !ok {
return i, false
}
if data[i] == '}' {
return i + 1, true
}
i++
for ; i < len(data); i++ {
switch data[i] {
default:
return i, false
case ' ', '\t', '\n', '\r':
continue
case '"':
goto key
}
}
return i, false
}
}
return i, false
}
func validcolon(data []byte, i int) (outi int, ok bool) {
for ; i < len(data); i++ {
switch data[i] {
default:
return i, false
case ' ', '\t', '\n', '\r':
continue
case ':':
return i + 1, true
}
}
return i, false
}
func validcomma(data []byte, i int, end byte) (outi int, ok bool) {
for ; i < len(data); i++ {
switch data[i] {
default:
return i, false
case ' ', '\t', '\n', '\r':
continue
case ',':
return i, true
case end:
return i, true
}
}
return i, false
}
func validarray(data []byte, i int) (outi int, ok bool) {
for ; i < len(data); i++ {
switch data[i] {
default:
for ; i < len(data); i++ {
if i, ok = validany(data, i); !ok {
return i, false
}
if i, ok = validcomma(data, i, ']'); !ok {
return i, false
}
if data[i] == ']' {
return i + 1, true
}
}
case ' ', '\t', '\n', '\r':
continue
case ']':
return i + 1, true
}
}
return i, false
}
func validstring(data []byte, i int) (outi int, ok bool) {
for ; i < len(data); i++ {
if data[i] < ' ' {
return i, false
} else if data[i] == '\\' {
i++
if i == len(data) {
return i, false
}
switch data[i] {
default:
return i, false
case '"', '\\', '/', 'b', 'f', 'n', 'r', 't':
case 'u':
for j := 0; j < 4; j++ {
i++
if i >= len(data) {
return i, false
}
if !((data[i] >= '0' && data[i] <= '9') ||
(data[i] >= 'a' && data[i] <= 'f') ||
(data[i] >= 'A' && data[i] <= 'F')) {
return i, false
}
}
}
} else if data[i] == '"' {
return i + 1, true
}
}
return i, false
}
func validnumber(data []byte, i int) (outi int, ok bool) {
i--
// sign
if data[i] == '-' {
i++
}
// int
if i == len(data) {
return i, false
}
if data[i] == '0' {
i++
} else {
for ; i < len(data); i++ {
if data[i] >= '0' && data[i] <= '9' {
continue
}
break
}
}
// frac
if i == len(data) {
return i, true
}
if data[i] == '.' {
i++
if i == len(data) {
return i, false
}
if data[i] < '0' || data[i] > '9' {
return i, false
}
i++
for ; i < len(data); i++ {
if data[i] >= '0' && data[i] <= '9' {
continue
}
break
}
}
// exp
if i == len(data) {
return i, true
}
if data[i] == 'e' || data[i] == 'E' {
i++
if i == len(data) {
return i, false
}
if data[i] == '+' || data[i] == '-' {
i++
}
if i == len(data) {
return i, false
}
if data[i] < '0' || data[i] > '9' {
return i, false
}
i++
for ; i < len(data); i++ {
if data[i] >= '0' && data[i] <= '9' {
continue
}
break
}
}
return i, true
}
func validtrue(data []byte, i int) (outi int, ok bool) {
if i+3 <= len(data) && data[i] == 'r' && data[i+1] == 'u' &&
data[i+2] == 'e' {
return i + 3, true
}
return i, false
}
func validfalse(data []byte, i int) (outi int, ok bool) {
if i+4 <= len(data) && data[i] == 'a' && data[i+1] == 'l' &&
data[i+2] == 's' && data[i+3] == 'e' {
return i + 4, true
}
return i, false
}
func validnull(data []byte, i int) (outi int, ok bool) {
if i+3 <= len(data) && data[i] == 'u' && data[i+1] == 'l' &&
data[i+2] == 'l' {
return i + 3, true
}
return i, false
}
// Valid returns true if the input is valid json.
//
// if !gjson.Valid(json) {
// return errors.New("invalid json")
// }
// value := gjson.Get(json, "name.last")
//
func Valid(json string) bool {
_, ok := validpayload(stringBytes(json), 0)
return ok
}
// ValidBytes returns true if the input is valid json.
//
// if !gjson.Valid(json) {
// return errors.New("invalid json")
// }
// value := gjson.Get(json, "name.last")
//
// If working with bytes, this method preferred over ValidBytes(string(data))
//
func ValidBytes(json []byte) bool {
_, ok := validpayload(json, 0)
return ok
}
func parseUint(s string) (n uint64, ok bool) {
var i int
if i == len(s) {
return 0, false
}
for ; i < len(s); i++ {
if s[i] >= '0' && s[i] <= '9' {
n = n*10 + uint64(s[i]-'0')
} else {
return 0, false
}
}
return n, true
}
func parseInt(s string) (n int64, ok bool) {
var i int
var sign bool
if len(s) > 0 && s[0] == '-' {
sign = true
i++
}
if i == len(s) {
return 0, false
}
for ; i < len(s); i++ {
if s[i] >= '0' && s[i] <= '9' {
n = n*10 + int64(s[i]-'0')
} else {
return 0, false
}
}
if sign {
return n * -1, true
}
return n, true
}
const minUint53 = 0
const maxUint53 = 4503599627370495
const minInt53 = -2251799813685248
const maxInt53 = 2251799813685247
func floatToUint(f float64) (n uint64, ok bool) {
n = uint64(f)
if float64(n) == f && n >= minUint53 && n <= maxUint53 {
return n, true
}
return 0, false
}
func floatToInt(f float64) (n int64, ok bool) {
n = int64(f)
if float64(n) == f && n >= minInt53 && n <= maxInt53 {
return n, true
}
return 0, false
}
// execModifier parses the path to find a matching modifier function.
// then input expects that the path already starts with a '@'
func execModifier(json, path string) (pathOut, res string, ok bool) {
name := path[1:]
var hasArgs bool
for i := 1; i < len(path); i++ {
if path[i] == ':' {
pathOut = path[i+1:]
name = path[1:i]
hasArgs = len(pathOut) > 0
break
}
if path[i] == '|' {
pathOut = path[i:]
name = path[1:i]
break
}
if path[i] == '.' {
pathOut = path[i:]
name = path[1:i]
break
}
}
if fn, ok := modifiers[name]; ok {
var args string
if hasArgs {
var parsedArgs bool
switch pathOut[0] {
case '{', '[', '"':
res := Parse(pathOut)
if res.Exists() {
_, args = parseSquash(pathOut, 0)
pathOut = pathOut[len(args):]
parsedArgs = true
}
}
if !parsedArgs {
idx := strings.IndexByte(pathOut, '|')
if idx == -1 {
args = pathOut
pathOut = ""
} else {
args = pathOut[:idx]
pathOut = pathOut[idx:]
}
}
}
return pathOut, fn(json, args), true
}
return pathOut, res, false
}
// DisableModifiers will disable the modifier syntax
var DisableModifiers = false
var modifiers = map[string]func(json, arg string) string{
"pretty": modPretty,
"ugly": modUgly,
"reverse": modReverse,
}
// AddModifier binds a custom modifier command to the GJSON syntax.
// This operation is not thread safe and should be executed prior to
// using all other gjson function.
func AddModifier(name string, fn func(json, arg string) string) {
modifiers[name] = fn
}
// ModifierExists returns true when the specified modifier exists.
func ModifierExists(name string, fn func(json, arg string) string) bool {
_, ok := modifiers[name]
return ok
}
// @pretty modifier makes the json look nice.
func modPretty(json, arg string) string {
if len(arg) > 0 {
opts := *pretty.DefaultOptions
Parse(arg).ForEach(func(key, value Result) bool {
switch key.String() {
case "sortKeys":
opts.SortKeys = value.Bool()
case "indent":
opts.Indent = value.String()
case "prefix":
opts.Prefix = value.String()
case "width":
opts.Width = int(value.Int())
}
return true
})
return bytesString(pretty.PrettyOptions(stringBytes(json), &opts))
}
return bytesString(pretty.Pretty(stringBytes(json)))
}
// @ugly modifier removes all whitespace.
func modUgly(json, arg string) string {
return bytesString(pretty.Ugly(stringBytes(json)))
}
// @reverse reverses array elements or root object members.
func modReverse(json, arg string) string {
res := Parse(json)
if res.IsArray() {
var values []Result
res.ForEach(func(_, value Result) bool {
values = append(values, value)
return true
})
out := make([]byte, 0, len(json))
out = append(out, '[')
for i, j := len(values)-1, 0; i >= 0; i, j = i-1, j+1 {
if j > 0 {
out = append(out, ',')
}
out = append(out, values[i].Raw...)
}
out = append(out, ']')
return bytesString(out)
}
if res.IsObject() {
var keyValues []Result
res.ForEach(func(key, value Result) bool {
keyValues = append(keyValues, key, value)
return true
})
out := make([]byte, 0, len(json))
out = append(out, '{')
for i, j := len(keyValues)-2, 0; i >= 0; i, j = i-2, j+1 {
if j > 0 {
out = append(out, ',')
}
out = append(out, keyValues[i+0].Raw...)
out = append(out, ':')
out = append(out, keyValues[i+1].Raw...)
}
out = append(out, '}')
return bytesString(out)
}
return json
}
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