
Tengo varias líneas JSON que son bastante largas (~1,5 KB) y pueden verse así:
"XYZ":{"myString":"myValue",ABCD}
y sólo quiero extraer "myString":"myValue" de toda la línea. grep por sí solo no me ayuda ya que está todo en una línea, pensé en canalizar la salida de grep
to awk
pero el divisor no parece funcionar según sea necesario. ¿Alguien puede ayudar aquí?
Tenga en cuenta que el documento no es un documento JSON únicamente. Hay una gran cantidad de contenido en el archivo y una parte de él son líneas JSON de las que me gustaría extraer myValue (como parte de myString). Una pieza de ejemplo podría verse así:
....other content...
....other content...
....other content...
....other content...!: {"response":{"container":{"id":"655ccc89-915c-4aae-a927-cca34bbedc29","timestamp":"2018-May-30
21:05:29.789543"},"id":"00000002-0000-0000-0000-000000000003"},"frames":{"frame":
{"id":"585","timestamp":"2016-Nov-30 12:57:06.500000","lps":{"lp":{"myString":"myValue","text":"8578D","wtext":"8578D","confidence":"4","bkcolor":"16777215","color":"16777215","type":"550171","ntip":"6","cct_country_short":"USA","cct_state_short":"FL","tips":{"tip":{"poly":{"p":{"x":"425","y":"28"},"p":{"x":"442","y":"28"},"p":{"x":"441","y":"62"},"p":{"x":"425","y":"62"}},"bkcolor":"16777215","color":"0","code":"53","code_ascii":"5","confidence":"3"},"tip":{"poly":{"p":{"x":"425","y":"28"},"p":{"x":"442","y":"28"},"p":{"x":"441","y":"62"},"p":{"x":"425","y":"62"}},"bkcolor":"16777215","color":"0","code":"56","code_ascii":"8","confidence":"4"},"tip":{"poly":{"p":{"x":"450","y":"28"},"p":{"x":"468","y":"28"},"p":{"x":"467","y":"63"},"p":{"x":"449","y":"63"}},"bkcolor":"16777215","color":"0","code":"53","code_ascii":"5","confidence":"98"},"tip":{"poly":{"p":{"x":"471","y":"28"},"p":{"x":"489","y":"28"},"p":{"x":"488","y":"63"},"p":{"x":"470","y":"63"}},"bkcolor":"16777215","color":"0","code":"55","code_ascii":"7","confidence":"99"},"tip":{"poly":{"p":{"x":"495","y":"28"},"p":{"x":"512","y":"28"},"p":{"x":"511","y":"63"},"p":{"x":"494","y":"63"}},"bkcolor":"16777215","color":"0","code":"56","code_ascii":"8","confidence":"98"},"tip":{"poly":{"p":{"x":"516","y":"28"},"p":{"x":"534","y":"28"},"p":{"x":"533","y":"63"},"p":{"x":"515","y":"63"}},"bkcolor":"16777215","color":"0","code":"68","code_ascii":"D","confidence":"98"}},"ncharacter":"5","characters":{"characater":{"poly":{"p":{"x":"425","y":"28"},"p":{"x":"442","y":"28"},"p":{"x":"441","y":"62"},"p":{"x":"425","y":"62"}},"bkcolor":"16777215","color":"0","code":"56","code_ascii":"8","confidence":"4"},"characater":{"poly":{"p":{"x":"450","y":"28"},"p":{"x":"468","y":"28"},"p":{"x":"467","y":"63"},"p":{"x":"449","y":"63"}},"bkcolor":"16777215","color":"0","code":"53","code_ascii":"5","confidence":"98"},"characater":{"poly":{"p":{"x":"471","y":"28"},"p":{"x":"489","y":"28"},"p":{"x":"488","y":"63"},"p":{"x":"470","y":"63"}},"bkcolor":"16777215","color":"0","code":"55","code_ascii":"7","confidence":"99"},"characater":{"poly":{"p":{"x":"495","y":"28"},"p":{"x":"512","y":"28"},"p":{"x":"511","y":"63"},"p":{"x":"494","y":"63"}},"bkcolor":"16777215","color":"0","code":"56","code_ascii":"8","confidence":"98"},"characater":{"poly":{"p":{"x":"516","y":"28"},"p":{"x":"534","y":"28"},"p":{"x":"533","y":"63"},"p":{"x":"515","y":"63"}},"bkcolor":"16777215","color":"0","code":"68","code_ascii":"D","confidence":"98"}},"det_time_us":"230387","poly":{"p":{"x":"353","y":"8"},"p":{"x":"541","y":"8"},"p":{"x":"540","y":"77"},"p":{"x":"352","y":"78"}}},"lp":{"licenseplate":"FRJ724","text":"FRJ724","wtext":"FRJ724","confidence":"66","bkcolor":"16777215","color":"16777215","type":"540122","ntip":"6","cct_country_short":"USA","cct_state_short":"NY","tips":{"tip":{"poly":{"p":{"x":"1553","y":"247"},"p":{"x":"1560","y":"247"},"p":{"x":"1560","y":"267"},"p":{"x":"1553","y":"267"}},"bkcolor":"16777215","color":"0","code":"70","code_ascii":"F","confidence":"94"},"tip":{"poly":{"p":{"x":"1561","y":"248"},"p":{"x":"1568","y":"248"},"p":{"x":"1568","y":"267"},"p":{"x":"1561","y":"267"}},"bkcolor":"16777215","color":"0","code":"82","code_ascii":"R","confidence":"99"},"tip":{"poly":{"p":{"x":"1570","y":"248"},"p":{"x":"1575","y":"248"},"p":{"x":"1575","y":"267"},"p":{"x":"1570","y":"267"}},"bkcolor":"16777215","color":"0","code":"74","code_ascii":"J","confidence":"84"},"tip":{"poly":{"p":{"x":"1586","y":"247"},"p":{"x":"1592","y":"247"},"p":{"x":"1592","y":"267"},"p":{"x":"1586","y":"267"}},"bkcolor":"16777215","color":"0","code":"55","code_ascii":"7","confidence":"99"},"tip":{"poly":{"p":{"x":"1593","y":"248"},"p":{"x":"1600","y":"248"},"p":{"x":"1600","y":"267"},"p":{"x":"1593","y":"267"}},"bkcolor":"16777215","color":"0","code":"50","code_ascii":"2","confidence":"90"},"tip":{"
poly":{"p":{"x":"1602","y":"248"},"p":{"x":"1607","y":"248"},"p":{"x":"1607","y":"266"},"p":{"x":"1602","y":"266"}},"bkcolor":"16777215","color":"0","code":"52","code_ascii":"4","confidence":"95"}},"ncharacter":"6","characters":{"characater":{"poly":{"p":{"x":"1553","y":"247"},"p":{"x":"1560","y":"247"},"p":{"x":"1560","y":"267"},"p":{"x":"1553","y":"267"}},"bkcolor":"16777215","color":"0","code":"70","code_ascii":"F","confidence":"94"},"characater":{"poly":{"p":{"x":"1561","y":"248"},"p":{"x":"1568","y":"248"},"p":{"x":"1568","y":"267"},"p":{"x":"1561","y":"267"}},"bkcolor":"16777215","color":"0","code":"82","code_ascii":"R","confidence":"99"},"characater":{"poly":{"p":{"x":"1570","y":"248"},"p":{"x":"1575","y":"248"},"p":{"x":"1575","y":"267"},"p":{"x":"1570","y":"267"}},"bkcolor":"16777215","color":"0","code":"74","code_ascii":"J","confidence":"84"},"characater":{"poly":{"p":{"x":"1586","y":"247"},"p":{"x":"1592","y":"247"},"p":{"x":"1592","y":"267"},"p":{"x":"1586","y":"267"}},"bkcolor":"16777215","color":"0","code":"55","code_ascii":"7","confidence":"99"},"characater":{"poly":{"p":{"x":"1593","y":"248"},"p":{"x":"1600","y":"248"},"p":{"x":"1600","y":"267"},"p":{"x":"1593","y":"267"}},"bkcolor":"16777215","color":"0","code":"50","code_ascii":"2","confidence":"90"},"characater":{"poly":{"p":{"x":"1602","y":"248"},"p":{"x":"1607","y":"248"},"p":{"x":"1607","y":"266"},"p":{"x":"1602","y":"266"}},"bkcolor":"16777215","color":"0","code":"52","code_ascii":"4","confidence":"95"}},"det_time_us":"672351","poly":{"p":{"x":"1543","y":"236"},"p":{"x":"1618","y":"237"},"p":{"x":"1618","y":"275"},"p":{"x":"1543","y":"274"}}}},"det_time_us":"1703430"}}}
....other content...
....other content...
....other content...
Respuesta1
Suponiendo que la cadena está en un archivo y constituye un documento JSON completo y bien formado, el siguiente comando extraería el valor correspondiente a cualquier clave myString
del documento:
jq -r '..|select(type == "object" and has("myString")).myString' file.json
La jq
expresión selecciona recursivamente objetos JSON en el documento que tiene una myString
clave y luego extrae el valor de esa clave.