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10
README.md
10
README.md
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@ -427,16 +427,6 @@ if result.Index > 0 {
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This is a best-effort no allocation sub slice of the original json. This method utilizes the `result.Index` field, which is the position of the raw data in the original json. It's possible that the value of `result.Index` equals zero, in which case the `result.Raw` is converted to a `[]byte`.
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## Get multiple values at once
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The `GetMany` function can be used to get multiple values at the same time.
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```go
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results := gjson.GetMany(json, "name.first", "name.last", "age")
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```
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The return value is a `[]Result`, which will always contain exactly the same number of items as the input paths.
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## Performance
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Benchmarks of GJSON alongside [encoding/json](https://golang.org/pkg/encoding/json/),
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30
gjson.go
30
gjson.go
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@ -3410,7 +3410,7 @@ func (t Result) Path(json string) string {
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if !rcomp.Exists() {
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goto fail
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}
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comp := escapeComp(rcomp.String())
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comp := Escape(rcomp.String())
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path = append(path, '.')
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path = append(path, comp...)
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}
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@ -3425,17 +3425,31 @@ fail:
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// isSafePathKeyChar returns true if the input character is safe for not
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// needing escaping.
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func isSafePathKeyChar(c byte) bool {
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return c <= ' ' || c > '~' || c == '_' || c == '-' || c == ':' ||
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(c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') ||
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(c >= '0' && c <= '9')
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return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') ||
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(c >= '0' && c <= '9') || c <= ' ' || c > '~' || c == '_' ||
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c == '-' || c == ':'
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}
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// escapeComp escaped a path compontent, making it safe for generating a
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// path for later use.
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func escapeComp(comp string) string {
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// Escape returns an escaped path component.
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//
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// json := `{
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// "user":{
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// "first.name": "Janet",
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// "last.name": "Prichard"
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// }
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// }`
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// user := gjson.Get(json, "user")
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// println(user.Get(gjson.Escape("first.name"))
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// println(user.Get(gjson.Escape("last.name"))
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// // Output:
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// // Janet
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// // Prichard
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func Escape(comp string) string {
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for i := 0; i < len(comp); i++ {
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if !isSafePathKeyChar(comp[i]) {
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ncomp := []byte(comp[:i])
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ncomp := make([]byte, len(comp)+1)
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copy(ncomp, comp[:i])
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ncomp = ncomp[:i]
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for ; i < len(comp); i++ {
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if !isSafePathKeyChar(comp[i]) {
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ncomp = append(ncomp, '\\')
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@ -2701,3 +2701,16 @@ func TestModDig(t *testing.T) {
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assert(t, Get(json, "@dig:name").String() == `["melinda","jake"]`)
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assert(t, Get(json, "@dig:secret").String() == `["password"]`)
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}
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func TestEscape(t *testing.T) {
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json := `{
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"user":{
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"first.name": "Janet",
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"last.name": "Prichard"
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}
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}`
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user := Get(json, "user")
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assert(t, user.Get(Escape("first.name")).String() == "Janet")
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assert(t, user.Get(Escape("last.name")).String() == "Prichard")
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assert(t, user.Get("first.name").String() == "")
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}
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