커맨드라인에서 JSON 데이터를 원하는 조건으로 자르고, 필터링하고 매핑할 수 있게 해주는 툴.
beautify
jq 에 그냥 문자열을 넘기면 beautify 를 해줘서 보기 편하다.
curl -X GET https://jsonplaceholder.typicode.com/users/1 | jq
내포된 객체의 특정 프로퍼티를 조회하기
https://jsonplaceholder.typicode.com/users/1
{
"id": 1,
"name": "Leanne Graham",
"username": "Bret",
"email": "Sincere@april.biz",
"address": {
"street": "Kulas Light",
"suite": "Apt. 556",
"city": "Gwenborough",
"zipcode": "92998-3874",
"geo": {
"lat": "-37.3159",
"lng": "81.1496"
}
},
"phone": "1-770-736-8031 x56442",
"website": "hildegard.org",
"company": {
"name": "Romaguera-Crona",
"catchPhrase": "Multi-layered client-server neural-net",
"bs": "harness real-time e-markets"
}
}
이런 json data가 있을때 company name만 찾고 싶다면 아래와 같은 식으로 셀렉터를 넘기면 된다.
$ curl -X GET https://jsonplaceholder.typicode.com/users/1 | jq '.company.name'
"Romaguera-Crona"
객체의 배열에서 원하는 프로퍼티를 조회하기
https://jsonplaceholder.typicode.com/users
[
{
"id": 1,
"name": "Leanne Graham",
"username": "Bret",
"email": "Sincere@april.biz",
"address": {
"street": "Kulas Light",
"suite": "Apt. 556",
"city": "Gwenborough",
"zipcode": "92998-3874",
"geo": {
"lat": "-37.3159",
"lng": "81.1496"
}
},
"phone": "1-770-736-8031 x56442",
"website": "hildegard.org",
"company": {
"name": "Romaguera-Crona",
"catchPhrase": "Multi-layered client-server neural-net",
"bs": "harness real-time e-markets"
}
},
{
"id": 2,
"name": "Ervin Howell",
"username": "Antonette",
"email": "Shanna@melissa.tv",
"address": {
"street": "Victor Plains",
"suite": "Suite 879",
"city": "Wisokyburgh",
"zipcode": "90566-7771",
"geo": {
"lat": "-43.9509",
"lng": "-34.4618"
}
},
"phone": "010-692-6593 x09125",
"website": "anastasia.net",
"company": {
"name": "Deckow-Crist",
"catchPhrase": "Proactive didactic contingency",
"bs": "synergize scalable supply-chains"
}
},
{
"id": 3,
"name": "Clementine Bauch",
"username": "Samantha",
"email": "Nathan@yesenia.net",
"address": {
"street": "Douglas Extension",
"suite": "Suite 847",
"city": "McKenziehaven",
"zipcode": "59590-4157",
"geo": {
"lat": "-68.6102",
"lng": "-47.0653"
}
},
"phone": "1-463-123-4447",
"website": "ramiro.info",
"company": {
"name": "Romaguera-Jacobson",
"catchPhrase": "Face to face bifurcated interface",
"bs": "e-enable strategic applications"
}
},
{
"id": 4,
"name": "Patricia Lebsack",
"username": "Karianne",
"email": "Julianne.OConner@kory.org",
"address": {
"street": "Hoeger Mall",
"suite": "Apt. 692",
"city": "South Elvis",
"zipcode": "53919-4257",
"geo": {
"lat": "29.4572",
"lng": "-164.2990"
}
},
"phone": "493-170-9623 x156",
"website": "kale.biz",
"company": {
"name": "Robel-Corkery",
"catchPhrase": "Multi-tiered zero tolerance productivity",
"bs": "transition cutting-edge web services"
}
},
{
"id": 5,
"name": "Chelsey Dietrich",
"username": "Kamren",
"email": "Lucio_Hettinger@annie.ca",
"address": {
"street": "Skiles Walks",
"suite": "Suite 351",
"city": "Roscoeview",
"zipcode": "33263",
"geo": {
"lat": "-31.8129",
"lng": "62.5342"
}
},
"phone": "(254)954-1289",
"website": "demarco.info",
"company": {
"name": "Keebler LLC",
"catchPhrase": "User-centric fault-tolerant solution",
"bs": "revolutionize end-to-end systems"
}
},
{
"id": 6,
"name": "Mrs. Dennis Schulist",
"username": "Leopoldo_Corkery",
"email": "Karley_Dach@jasper.info",
"address": {
"street": "Norberto Crossing",
"suite": "Apt. 950",
"city": "South Christy",
"zipcode": "23505-1337",
"geo": {
"lat": "-71.4197",
"lng": "71.7478"
}
},
"phone": "1-477-935-8478 x6430",
"website": "ola.org",
"company": {
"name": "Considine-Lockman",
"catchPhrase": "Synchronised bottom-line interface",
"bs": "e-enable innovative applications"
}
},
{
"id": 7,
"name": "Kurtis Weissnat",
"username": "Elwyn.Skiles",
"email": "Telly.Hoeger@billy.biz",
"address": {
"street": "Rex Trail",
"suite": "Suite 280",
"city": "Howemouth",
"zipcode": "58804-1099",
"geo": {
"lat": "24.8918",
"lng": "21.8984"
}
},
"phone": "210.067.6132",
"website": "elvis.io",
"company": {
"name": "Johns Group",
"catchPhrase": "Configurable multimedia task-force",
"bs": "generate enterprise e-tailers"
}
},
{
"id": 8,
"name": "Nicholas Runolfsdottir V",
"username": "Maxime_Nienow",
"email": "Sherwood@rosamond.me",
"address": {
"street": "Ellsworth Summit",
"suite": "Suite 729",
"city": "Aliyaview",
"zipcode": "45169",
"geo": {
"lat": "-14.3990",
"lng": "-120.7677"
}
},
"phone": "586.493.6943 x140",
"website": "jacynthe.com",
"company": {
"name": "Abernathy Group",
"catchPhrase": "Implemented secondary concept",
"bs": "e-enable extensible e-tailers"
}
},
{
"id": 9,
"name": "Glenna Reichert",
"username": "Delphine",
"email": "Chaim_McDermott@dana.io",
"address": {
"street": "Dayna Park",
"suite": "Suite 449",
"city": "Bartholomebury",
"zipcode": "76495-3109",
"geo": {
"lat": "24.6463",
"lng": "-168.8889"
}
},
"phone": "(775)976-6794 x41206",
"website": "conrad.com",
"company": {
"name": "Yost and Sons",
"catchPhrase": "Switchable contextually-based project",
"bs": "aggregate real-time technologies"
}
},
{
"id": 10,
"name": "Clementina DuBuque",
"username": "Moriah.Stanton",
"email": "Rey.Padberg@karina.biz",
"address": {
"street": "Kattie Turnpike",
"suite": "Suite 198",
"city": "Lebsackbury",
"zipcode": "31428-2261",
"geo": {
"lat": "-38.2386",
"lng": "57.2232"
}
},
"phone": "024-648-3804",
"website": "ambrose.net",
"company": {
"name": "Hoeger LLC",
"catchPhrase": "Centralized empowering task-force",
"bs": "target end-to-end models"
}
}
]
이 json data 에서 name 만 모두 뽑고 싶다고 하면 아래와 같이 하면 된다.
$ curl -X GET https://jsonplaceholder.typicode.com/users | jq '.[].name'
"Leanne Graham"
"Ervin Howell"
"Clementine Bauch"
"Patricia Lebsack"
"Chelsey Dietrich"
"Mrs. Dennis Schulist"
"Kurtis Weissnat"
"Nicholas Runolfsdottir V"
"Glenna Reichert"
"Clementina DuBuque"
빌트인 함수로 json 문자열 파싱하기
json 응답 중에 텍스트로 변환된 json 값이 있을때 이를 json 으로 파싱해서 다시 조회하기
json 텍스트 <-> json 을 변환할 수 있는 fromjson과 tojson 빌트인함수가 있다.
아래와 같이 사용할 수 있다.
curl -X GET "https://api.brunch.co.kr/v4/article/@@HaI/590" | jq '.data.article.content | fromjson | .cover'