JSON: convertir timestamp - JQ: erreur (à <stdin>): ne peut pas index chaîne avec la chaîne « horodatage » de fichier brut

Question

$ < galera-healthcheck.stdout.log jq '.' | head -n 40 
{ 
    "timestamp": "1499779398.544612646", 
    "source": "Galera Healthcheck", 
    "message": "Galera Healthcheck.Opened DB connection", 
    "log_level": 1, 
    "data": { 
    "dbHost": "0.0.0.0", 
    "dbPort": 3306, 
    "dbUser": "galera-healthcheck" 
    } 
} 
{ 
    "timestamp": "1499779398.544713974", 
    "source": "Galera Healthcheck", 
    "message": "Galera Healthcheck.Serving healthcheck endpoint", 
    "log_level": 1, 
    "data": { 
    "url": "http://0.0.0.0:9200/" 
    } 
} 
{ 
    "timestamp": "1499779398.544794559", 
    "source": "Galera Healthcheck", 
    "message": "Galera Healthcheck.Attempting to GET endpoint...", 
    "log_level": 1, 
    "data": { 
    "url": "http://0.0.0.0:9200/" 
    } 
} 
{ 
    "timestamp": "1499779398.545407295", 
    "source": "Galera Healthcheck", 
    "message": "Galera Healthcheck.Failed to process request", 
    "log_level": 2, 
    "data": { 
    "error": "Cannot get status from galera" 
    } 
} 
{ 
    "timestamp": "1499779398.545511246", 

Je souhaite que le même fichier brut, mais les horodatages sous forme lisible par l'homme.

J'ai essayé:

< galera-healthcheck.stdout.log jq 'map(if .timestamp then .timestamp |= todate else . end)' 

et a obtenu cette erreur pour chaque ligne dans le fichier

(...) 
jq: error (at <stdin>:968): Cannot index string with string "timestamp" 
jq: error (at <stdin>:969): Cannot index string with string "timestamp" 
jq: error (at <stdin>:970): Cannot index string with string "timestamp" 
jq: error (at <stdin>:971): Cannot index string with string "timestamp" 
jq: error (at <stdin>:972): Cannot index string with string "timestamp" 
jq: error (at <stdin>:973): Cannot index string with string "timestamp" 
jq: error (at <stdin>:974): Cannot index string with string "timestamp" 
jq: error (at <stdin>:975): Cannot index string with string "timestamp" 
jq: error (at <stdin>:976): Cannot index string with string "timestamp" 
jq: error (at <stdin>:977): Cannot index string with string "timestamp" 
jq: error (at <stdin>:978): Cannot index string with string "timestamp" 
jq: error (at <stdin>:979): Cannot index string with string "timestamp" 
jq: error (at <stdin>:980): Cannot index string with string "timestamp" 
jq: error (at <stdin>:981): Cannot index string with string "timestamp" 
jq: error (at <stdin>:982): Cannot index string with string "timestamp" 
jq: error (at <stdin>:983): Cannot index string with string "timestamp" 
jq: error (at <stdin>:984): Cannot index string with string "timestamp" 
jq: error (at <stdin>:985): Cannot index string with string "timestamp" 
jq: error (at <stdin>:986): Cannot index string with string "timestamp" 
jq: error (at <stdin>:987): Cannot index string with string "timestamp" 
jq: error (at <stdin>:988): Cannot index string with string "timestamp" 
jq: error (at <stdin>:989): Cannot index string with string "timestamp" 
jq: error (at <stdin>:990): Cannot index string with string "timestamp" 
jq: error (at <stdin>:991): Cannot index string with string "timestamp" 
jq: error (at <stdin>:992): Cannot index string with string "timestamp" 
jq: error (at <stdin>:993): Cannot index string with string "timestamp" 
jq: error (at <stdin>:994): Cannot index string with string "timestamp" 
jq: error (at <stdin>:995): Cannot index string with string "timestamp" 
jq: error (at <stdin>:996): Cannot index string with string "timestamp" 
jq: error (at <stdin>:997): Cannot index string with string "timestamp" 
jq: error (at <stdin>:998): Cannot index string with string "timestamp" 

mise à jour après la première réponse:

interrompez l'appel à 'carte'. 'Todate' s'attend à ce que son entrée soit numérique, donc vous devrez ajouter un appel à 'tonumber'.

TimeStamps encore au format époque, non lisible par l'homme:

< galera-healthcheck.stdout.log jq '(if .timestamp then .timestamp |= tonumber else . end)' | head 
{ 
    "timestamp": 1499779398.5446126, 
    "source": "Galera Healthcheck", 
    "message": "Galera Healthcheck.Opened DB connection", 
    "log_level": 1, 
    "data": { 
    "dbHost": "0.0.0.0", 
    "dbPort": 3306, 
    "dbUser": "galera-healthcheck" 
    } 

Answer 1

1. interrompez l'appel à 'carte'.

2. 'todate' attend à ce que son entrée soit numérique, vous devrez ajouter un appel à 'tonumber':

   .timestamp |= (tonumber|todate)