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YANPM/apps/agent/doc/api.md

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# HTTP API Reference
Base: HTTP over a unix-domain socket. Example using curl: `curl --unix-socket /path/to/socket -X POST http://localhost/<path>`
1) GET /status
- Response: 200 OK
- Body: JSON `{ "ok": true }`
2) POST /validate
- Request JSON:
```json
{
"config_name": "example",
"timestamp": 1234567890
}
```
- Behavior: validates the fragment file named by `config_name` and `timestamp` under the agent's internal subdirectory inside the configured nginx config directory. Delegates to `ValidateCommand::validate`.
- Success: 200 OK, body is `[rc, output]` tuple serialized as JSON (actual shape is `(i32, String)` returned from the command; examine responses for exact formatting).
- Error cases:
- 400 Bad Request: invalid or malformed JSON
- 500 Internal Server Error: validation error or missing fragment file
- Request JSON:
```json
{
"config_name": "example",
"timestamp": 1234567890
}
```
- Behavior: validates the fragment file named by `config_name` and `timestamp` under the agent's internal subdirectory inside the configured nginx config directory. Delegates to `ValidateCommand::validate`.
- Success: 200 OK, body is a JSON array `[rc, output]` where `rc` is the integer return code and `output` is the combined stdout/stderr string from the validation command (the command returns an `(i32, String)` tuple).
- Error cases:
- 400 Bad Request: invalid or malformed JSON
- 500 Internal Server Error: validation error or missing fragment file
3) POST /validate_and_reload
- Request JSON same as `/validate`.
- Behavior: runs validation and, on success, attempts to reload nginx. Returns an object with `rc` and `ro` (return code and combined stdout/stderr output).
- Success: 200 OK with body: `{ "rc": <int>, "ro": "<output>" }`
- Errors: 400 for malformed JSON, 500 if the validate-and-reload command fails (body presents error text).
4) POST /write_config
- Request JSON:
```json
{
"config_name": "example",
"timestamp": 1234567890,
"content": "server { ... }"
}
```
- Behavior: writes the provided `content` into an agent-managed fragment file named from `config_name` and `timestamp` in the internal subdirectory under `nginx_config_dir`.
- Success: 200 OK with empty body
- Error: 400 for malformed JSON, 500 if writing the file fails
Notes
- The agent expects callers to choose a `config_name` and `timestamp` that together form a unique filename. The concrete filename encoding is performed by `commands::run::to_file_name` in source.
- On validation failures the returned output often contains the full `nginx -t` output; inspect `ro` or the returned JSON error messages.