Search for a key with `.` and `/` in key

[git001]

I try to search for that key kubernetes.io/serviceaccount/namespace, is this possible with this lib?

Here my naive sample code

#include <core_json.h>
#include <stdio.h>

int main()
{
    // Variables used in this example.
    JSONStatus_t result;
    char buffer[] = "{\"iss\":\"kubernetes/serviceaccount\",\"kubernetes.io/serviceaccount/namespace\":\"openshift-logging\",\"foo\":\"abc\",\"bar\":{\"foo\":\"xyz\"}}";
    size_t bufferLength = sizeof(buffer) - 1;
    // char query[] = "kubernetes.io/serviceaccount/namespace";
    char query[] = "iss";
    size_t queryLength = sizeof(query) - 1;
    char *value;
    size_t valueLength;

    // Calling JSON_Validate() is not necessary if the document is guaranteed to be valid.
    result = JSON_Validate(buffer, bufferLength);
    if (result == JSONSuccess)
    {
        result = JSON_Search(buffer, bufferLength, query, queryLength,
                             &value, &valueLength);
        if (result == JSONSuccess)
        {
            // The pointer "value" will point to a location in the "buffer".
            char save = value[valueLength];
            // After saving the character, set it to a null byte for printing.
            value[valueLength] = '\0';
            // "Found: bar.foo -> xyz" will be printed.
            printf("Found: %s -> %s\n", query, value);
            // Restore the original character.
            value[valueLength] = save;
        } else {
            printf("NOT JSON_Search Found: %d\n", result);
        }
    }
    else
    {
        printf("NOT JSON_Validate Found: %s\n", query);
    }
}

build with this command

# kubernetes.io/serviceaccount/namespace
git-repos/coreJSON$ gcc -Isource/include/ source/core_json.c test/jwt/my-jwt.c -o test/jwt/my-jwt && test/jwt/my-jwt
# iss
gcc -Isource/include/ source/core_json.c test/jwt/my-jwt.c -o test/jwt/my-jwt && test/jwt/my-jwt
Found: iss -> kubernetes/serviceaccount

[dan4thewin]

Hi, @git001 .
You can change the query key separator by changing the definition of JSON_QUERY_KEY_SEPARATOR in core_json.c: https://github.com/FreeRTOS/coreJSON/blob/main/source/core_json.c#L1438

[git001]

Thanks for answer but I don't know to which character I should change the separator.
Well I think the separator is okay it would be more helpful when the library handle the escape sequence \\ in front of the separator.

When the escape sequence is honored can the query string used like this kubernetes\\.io/serviceaccount/namespace

[dan4thewin]

Is there a character that you know will not occur in your key space? How about the pipe symbol? The escape sequence is something we could consider for a future release. Thank you for the suggestion.

[git001]

thanks @dan4thewin that's it. After changing the separator to '|' I got what expected

vi source/core_json.c

#define JSON_QUERY_KEY_SEPARATOR    '|'

gcc -Isource/include/ source/core_json.c test/jwt/my-jwt.c -o test/jwt/my-jwt && test/jwt/my-jwt
Found: kubernetes.io/serviceaccount/namespace -> openshift-logging

How about to add a #ifndef around JSON_QUERY_KEY_SEPARATOR to make it easier for developer?

[dan4thewin]

Sure, I've submitted a PR.

[git001]

Thank you