Different ways to validate JSON string
Check if string is valid JSON
In the below program isJSON function is used to validate given string contains valid JSON or not.
Example
package main
import (
"encoding/json"
"fmt"
)
var Object = `{
"userId": 1,
"id": 1,
"title": "delectus aut autem",
"completed": false
}`
var Array = `[{"key": "value1"}, {"key": "value2"}]`
func isJSON(s string) bool {
var js interface{}
return json.Unmarshal([]byte(s), &js) == nil
}
func main() {
val1 := isJSON(Object)
fmt.Println(val1)
val2 := isJSON(Array)
fmt.Println(val2)
}
Output
true
true
JSON validate using Standard Library function
Example
package main
import (
"fmt"
"encoding/json"
)
func main() {
var tests = []string{
`"Platypus"`,
`Platypus`,
`{"id":"1"}`,
`{"id":"1}`,
}
for _, t := range tests {
fmt.Printf("Is valid: (%s) = %v\n", t, json.Valid([]byte(t)))
}
}
Output
Is valid: ("Platypus") = true
Is valid: (Platypus) = false
Is valid: ({"id":"1"}) = true
Is valid: ({"id":"1}) = false
Most Helpful This Week
How can we reverse a simple string in Go?How to check UPPERCASE characters in a string in Golang?How to get first and last element of slice in Golang? How to kill execution of goroutine?Example: How to use ReadFull from IO Package in Golang?How to read/write from/to file in Golang?How to extract text from between html tag using Regular Expressions in Golang?How to check if a map contains a key in Go?How to delete or remove element from a Map?Regular expression to extract domain from URL