# Jsonpath Library
[JsonPath](https://goessner.net/articles/JsonPath/) Rust 구현
## 왜?
To enjoy Rust
## 사용법
## With Javascript (WebAssembly)
#### `jsonpath-wasm` 라이브리러
*(not yet published `jsonpath-wasm`)*
```javascript
// browser
import * as jsonpath from "jsonpath-wasm";
// nodejs
let jsonpath = require('jsonpath-wasm');
```
#### `read` 함수
```javascript
let jsonObj = {
"school": {
"friends": [{"id": 0}, {"id": 1}]
},
"friends": [{"id": 0}, {"id": 1}]
};
let ret = [{"id": 0}, {"id": 0}];
let a = jsonpath.read(JSON.stringify(jsonObj), "$..friends[0]");
let b = jsonpath.read(jsonObj, "$..friends[0]");
console.log(
JSON.stringify(ret) == JSON.stringify(a),
JSON.stringify(a) == JSON.stringify(b)
);
```
#### JsonPath 재사용
```javascript
let template = jsonpath.compile("$..friends[0]");
let jsonObj = {
"school": {
"friends": [ {"id": 0}, {"id": 1} ]
},
"friends": [ {"id": 0}, {"id": 1} ]
};
let ret = [ {"id": 0}, {"id": 0} ];
// 1. read as json object
console.log(JSON.stringify(template(jsonObj)) == JSON.stringify(ret));
// 2. read as json string
console.log(JSON.stringify(template(JSON.stringify(jsonObj))) == JSON.stringify(ret));
let jsonObj2 = {
"school": {
"friends": [ {"name": "Millicent Norman"}, {"name": "Vincent Cannon"} ]
},
"friends": [ {"id": 0}, {"id": 1} ]
};
let ret2 = [ {"id": 0}, {"name": "Millicent Norman"} ];
// 1. read as json object
console.log(JSON.stringify(template(jsonObj2)) == JSON.stringify(ret2));
// 2. read as json string
console.log(JSON.stringify(template(JSON.stringify(jsonObj2))) == JSON.stringify(ret2));
```
#### Json 재사용
```javascript
let jsonObj = {
"school": {
"friends": [{"id": 0}, {"id": 1}]
},
"friends": [{"id": 0},{"id": 1}]
};
// 1. read as json object
let reader = jsonpath.reader(jsonObj);
console.log(JSON.stringify(reader("$..friends[0]")) == JSON.stringify([ {"id": 0}, {"id": 0} ]));
console.log(JSON.stringify(reader("$..friends[1]")) == JSON.stringify([ {"id": 1}, {"id": 1} ]));
// 2. read as json string
let reader2 = jsonpath.reader(JSON.stringify(jsonObj));
console.log(JSON.stringify(reader2("$..friends[0]")) == JSON.stringify([ {"id": 0}, {"id": 0} ]));
console.log(JSON.stringify(reader2("$..friends[1]")) == JSON.stringify([ {"id": 1}, {"id": 1} ]));
```
### 예제
**Demo**: https://freestrings.github.io/jsonpath/
json 데이터 *(참고 사이트: https://github.com/json-path/JsonPath)*
```javascript
{
"store": {
"book": [
{
"category": "reference",
"author": "Nigel Rees",
"title": "Sayings of the Century",
"price": 8.95
},
{
"category": "fiction",
"author": "Evelyn Waugh",
"title": "Sword of Honour",
"price": 12.99
},
{
"category": "fiction",
"author": "Herman Melville",
"title": "Moby Dick",
"isbn": "0-553-21311-3",
"price": 8.99
},
{
"category": "fiction",
"author": "J. R. R. Tolkien",
"title": "The Lord of the Rings",
"isbn": "0-395-19395-8",
"price": 22.99
}
],
"bicycle": {
"color": "red",
"price": 19.95
}
},
"expensive": 10
}
```
| <a href="https://freestrings.github.io/jsonpath/?path=$.store.book[*].author" target="_blank">$.store.book[*].author</a>| The authors of all books |
| <a href="https://freestrings.github.io/jsonpath/?path=$..author" target="_blank">$..author</a> | All authors |
| <a href="https://freestrings.github.io/jsonpath/?path=$.store.*" target="_blank">$.store.*</a> | All things, both books and bicycles |
| <a href="https://freestrings.github.io/jsonpath/?path=$.store..price" target="_blank">$.store..price</a> | The price of everything |
| <a href="https://freestrings.github.io/jsonpath/?path=$..book[2]" target="_blank">$..book[2]</a> | The third book |
| <a href="https://freestrings.github.io/jsonpath/?path=$..book[2]" target="_blank">$..book[-2]</a> | The second to last book |
| <a href="https://freestrings.github.io/jsonpath/?path=$..book[0,1]" target="_blank">$..book[0,1]</a> | The first two books |
| <a href="https://freestrings.github.io/jsonpath/?path=$..book[:2]" target="_blank">$..book[:2]</a> | All books from index 0 (inclusive) until index 2 (exclusive) |
| <a href="https://freestrings.github.io/jsonpath/?path=$..book[1:2]" target="_blank">$..book[1:2]</a> | All books from index 1 (inclusive) until index 2 (exclusive) |
| <a href="https://freestrings.github.io/jsonpath/?path=$..book[-2:]" target="_blank">$..book[-2:]</a> | Last two books |
| <a href="https://freestrings.github.io/jsonpath/?path=$..book[2:]" target="_blank">$..book[2:]</a> | Book number two from tail |
| <a href="https://freestrings.github.io/jsonpath/?path=$..book[?(@.isbn)]" target="_blank">$..book[?(@.isbn)]</a> | All books with an ISBN number |
| <a href="https://freestrings.github.io/jsonpath/?path=$.store.book[?(@.price < 10)]" target="_blank">$.store.book[?(@.price < 10)]</a> | All books in store cheaper than 10 |
| <a href="https://freestrings.github.io/jsonpath/?path=$..*" target="_blank">$..*</a> | Give me every thing
| <a href="https://freestrings.github.io/jsonpath/?path=%24..book%5B%3F((%40.price%20%3D%3D%2012.99%20%7C%7C%20%24.store.bicycle.price%20%3C%20%40.price)%20%7C%7C%20%40.category%20%3D%3D%20%22reference%22)%5D" target="_blank">$..book[?((@.price == 12.99 | | $.store.bicycle.price < @.price) || @.category == "reference")]</a> | Complex filter
## With Rust (as library)
```rust
extern crate jsonpath_lib as jsonpath;
#[macro_use]
extern crate serde_json;
```
#### `read` 함수
```rust
let json_obj = json!({
"school": {
"friends": [{"id": 0}, {"id": 1}]
},
"friends": [{"id": 0}, {"id": 1}]
});
let json = jsonpath::read(json_obj, "$..friends[0]").unwrap();
let ret = json!([ {"id": 0}, {"id": 0} ]);
assert_eq!(json, ret)
```
#### JsonPath 재사용
```rust
let mut template = jsonpath::compile("$..friends[0]");
let json_obj = json!({
"school": {
"friends": [ {"id": 0}, {"id": 1} ]
},
"friends": [ {"id": 0}, {"id": 1} ]
});
let json = template(json_obj).unwrap();
let ret = json!([ {"id": 0}, {"id": 0} ]);
assert_eq!(json, ret);
let json_obj = json!({
"school": {
"friends": [ {"name": "Millicent Norman"}, {"name": "Vincent Cannon"} ]
},
"friends": [ {"id": 0}, {"id": 1} ]
});
let json = template(json_obj).unwrap();
let ret = json!([ {"id": 0}, {"name": "Millicent Norman"} ]);
assert_eq!(json, ret);
```
#### Json 재사용
```rust
let json_obj = json!({
"school": {
"friends": [{"id": 0}, {"id": 1}]
},
"friends": [{"id": 0},{"id": 1}]
});
let mut reader = jsonpath::reader(json_obj);
let json = reader("$..friends[0]").unwrap();
let ret = json!([ {"id": 0}, {"id": 0} ]);
assert_eq!(json, ret);
let json = reader("$..friends[1]").unwrap();
let ret = json!([ {"id": 1}, {"id": 1} ]);
assert_eq!(json, ret);
```
#### 예제
```rust
let json_obj = json!({
"store": {
"book": [
{
"category": "reference",
"author": "Nigel Rees",
"title": "Sayings of the Century",
"price": 8.95
},
{
"category": "fiction",
"author": "Evelyn Waugh",
"title": "Sword of Honour",
"price": 12.99
},
{
"category": "fiction",
"author": "Herman Melville",
"title": "Moby Dick",
"isbn": "0-553-21311-3",
"price": 8.99
},
{
"category": "fiction",
"author": "J. R. R. Tolkien",
"title": "The Lord of the Rings",
"isbn": "0-395-19395-8",
"price": 22.99
}
],
"bicycle": {
"color": "red",
"price": 19.95
}
},
"expensive": 10
});
let mut reader = jsonpath::reader(json_obj);
//
// $.store.book[*].author
//
let json = reader("$.store.book[*].author").unwrap();
let ret = json!([
"Nigel Rees",
"Evelyn Waugh",
"Herman Melville",
"J. R. R. Tolkien"
]);
assert_eq!(json, ret);
//
// $..author
//
let json = reader("$..author").unwrap();
let ret = json!([
"Nigel Rees",
"Evelyn Waugh",
"Herman Melville",
"J. R. R. Tolkien"
]);
assert_eq!(json, ret);
//
// $.store.*
//
let json = reader("$.store.*").unwrap();
let ret = json!([
[
{
"category": "reference",
"author": "Nigel Rees",
"title": "Sayings of the Century",
"price": 8.95
},
{
"category": "fiction",
"author": "Evelyn Waugh",
"title": "Sword of Honour",
"price": 12.99
},
{
"category": "fiction",
"author": "Herman Melville",
"title": "Moby Dick",
"isbn": "0-553-21311-3",
"price": 8.99
},
{
"category": "fiction",
"author": "J. R. R. Tolkien",
"title": "The Lord of the Rings",
"isbn": "0-395-19395-8",
"price": 22.99
}
],
{
"color": "red",
"price": 19.95
}
]);
assert_eq!(ret, json);
//
// $.store..price
//
let json = reader("$.store..price").unwrap();
let ret = json!([8.95, 12.99, 8.99, 22.99, 19.95]);
assert_eq!(ret, json);
//
// $..book[2]
//
let json = reader("$..book[2]").unwrap();
let ret = json!([{
"category" : "fiction",
"author" : "Herman Melville",
"title" : "Moby Dick",
"isbn" : "0-553-21311-3",
"price" : 8.99
}]);
assert_eq!(ret, json);
//
// $..book[-2]
//
let json = reader("$..book[-2]").unwrap();
let ret = json!([{
"category" : "fiction",
"author" : "Herman Melville",
"title" : "Moby Dick",
"isbn" : "0-553-21311-3",
"price" : 8.99
}]);
assert_eq!(ret, json);
//
// $..book[0,1]
//
let json = reader("$..book[0,1]").unwrap();
let ret = json!([
{
"category": "reference",
"author": "Nigel Rees",
"title": "Sayings of the Century",
"price": 8.95
},
{
"category": "fiction",
"author": "Evelyn Waugh",
"title": "Sword of Honour",
"price": 12.99
}
]);
assert_eq!(ret, json);
//
// $..book[:2]
//
let json = reader("$..book[:2]").unwrap();
let ret = json!([
{
"category": "reference",
"author": "Nigel Rees",
"title": "Sayings of the Century",
"price": 8.95
},
{
"category": "fiction",
"author": "Evelyn Waugh",
"title": "Sword of Honour",
"price": 12.99
}
]);
assert_eq!(ret, json);
//
// $..book[2:]
//
let json = reader("$..book[2:]").unwrap();
let ret = json!([
{
"category": "fiction",
"author": "Herman Melville",
"title": "Moby Dick",
"isbn": "0-553-21311-3",
"price": 8.99
},
{
"category": "fiction",
"author": "J. R. R. Tolkien",
"title": "The Lord of the Rings",
"isbn": "0-395-19395-8",
"price": 22.99
}
]);
assert_eq!(ret, json);
//
// $..book[?(@.isbn)]
//
let json = reader("$..book[?(@.isbn)]").unwrap();
let ret = json!([
{
"category": "fiction",
"author": "Herman Melville",
"title": "Moby Dick",
"isbn": "0-553-21311-3",
"price": 8.99
},
{
"category": "fiction",
"author": "J. R. R. Tolkien",
"title": "The Lord of the Rings",
"isbn": "0-395-19395-8",
"price": 22.99
}
]);
assert_eq!(ret, json);
//
// $.store.book[?(@.price < 10)]
//
let json = reader("$.store.book[?(@.price < 10)]").unwrap();
let ret = json!([
{
"category": "reference",
"author": "Nigel Rees",
"title": "Sayings of the Century",
"price": 8.95
},
{
"category": "fiction",
"author": "Herman Melville",
"title": "Moby Dick",
"isbn": "0-553-21311-3",
"price": 8.99
}
]);
assert_eq!(ret, json);
//
// $..book[?((@.price == 12.99 || $.store.bicycle.price < @.price) || @.category == "reference")]
//
let json = reader("$..book[?((@.price == 12.99 || $.store.bicycle.price < @.price) || @.category == "reference")]").unwrap();
let ret = json!([
{
"category": "fiction",
"author": "Evelyn Waugh",
"title": "Sword of Honour",
"price": 12.99
},
{
"category": "fiction",
"author": "J. R. R. Tolkien",
"title": "The Lord of the Rings",
"isbn": "0-395-19395-8",
"price": 22.99
},
{
"category": "reference",
"author": "Nigel Rees",
"title": "Sayings of the Century",
"price": 8.95
}
]);
assert_eq!(ret, json);
```
## With AWS API Gateway
-
# 성능테스트