mirror of https://github.com/jkjoy/sunpeiwen.git
63 lines
2.0 KiB
Markdown
63 lines
2.0 KiB
Markdown
## JSON
|
|
|
|
The _JSON_ object provides the C++ versions of the methods offered by the `JSON` object in javascript. V8 exposes these methods via the `v8::JSON` object.
|
|
|
|
- <a href="#api_nan_json_parse"><b><code>Nan::JSON.Parse</code></b></a>
|
|
- <a href="#api_nan_json_stringify"><b><code>Nan::JSON.Stringify</code></b></a>
|
|
|
|
Refer to the V8 JSON object in the [V8 documentation](https://v8docs.nodesource.com/node-8.16/da/d6f/classv8_1_1_j_s_o_n.html) for more information about these methods and their arguments.
|
|
|
|
<a name="api_nan_json_parse"></a>
|
|
|
|
### Nan::JSON.Parse
|
|
|
|
A simple wrapper around [`v8::JSON::Parse`](https://v8docs.nodesource.com/node-8.16/da/d6f/classv8_1_1_j_s_o_n.html#a936310d2540fb630ed37d3ee3ffe4504).
|
|
|
|
Definition:
|
|
|
|
```c++
|
|
Nan::MaybeLocal<v8::Value> Nan::JSON::Parse(v8::Local<v8::String> json_string);
|
|
```
|
|
|
|
Use `JSON.Parse(json_string)` to parse a string into a `v8::Value`.
|
|
|
|
Example:
|
|
|
|
```c++
|
|
v8::Local<v8::String> json_string = Nan::New("{ \"JSON\": \"object\" }").ToLocalChecked();
|
|
|
|
Nan::JSON NanJSON;
|
|
Nan::MaybeLocal<v8::Value> result = NanJSON.Parse(json_string);
|
|
if (!result.IsEmpty()) {
|
|
v8::Local<v8::Value> val = result.ToLocalChecked();
|
|
}
|
|
```
|
|
|
|
<a name="api_nan_json_stringify"></a>
|
|
|
|
### Nan::JSON.Stringify
|
|
|
|
A simple wrapper around [`v8::JSON::Stringify`](https://v8docs.nodesource.com/node-8.16/da/d6f/classv8_1_1_j_s_o_n.html#a44b255c3531489ce43f6110209138860).
|
|
|
|
Definition:
|
|
|
|
```c++
|
|
Nan::MaybeLocal<v8::String> Nan::JSON::Stringify(v8::Local<v8::Object> json_object, v8::Local<v8::String> gap = v8::Local<v8::String>());
|
|
```
|
|
|
|
Use `JSON.Stringify(value)` to stringify a `v8::Object`.
|
|
|
|
Example:
|
|
|
|
```c++
|
|
// using `v8::Local<v8::Value> val` from the `JSON::Parse` example
|
|
v8::Local<v8::Object> obj = Nan::To<v8::Object>(val).ToLocalChecked();
|
|
|
|
Nan::JSON NanJSON;
|
|
Nan::MaybeLocal<v8::String> result = NanJSON.Stringify(obj);
|
|
if (!result.IsEmpty()) {
|
|
v8::Local<v8::String> stringified = result.ToLocalChecked();
|
|
}
|
|
```
|
|
|