From fbb46bdfd76ebe695a3085c692b29c84a8949d20 Mon Sep 17 00:00:00 2001
From: chai2010 <chaishushan@gmail.com>
Date: Mon, 1 May 2023 21:56:47 +0800
Subject: [PATCH] =?UTF-8?q?=E5=87=86=E5=A4=87=20lsp=20=E4=BE=9D=E8=B5=96?=
 =?UTF-8?q?=E7=9A=84=20rpc=20=E8=BE=85=E5=8A=A9=E5=8C=85?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 internal/lsp/rpc.go | 86 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 86 insertions(+)
 create mode 100644 internal/lsp/rpc.go

diff --git a/internal/lsp/rpc.go b/internal/lsp/rpc.go
new file mode 100644
index 0000000..84e2c6f
--- /dev/null
+++ b/internal/lsp/rpc.go
@@ -0,0 +1,86 @@
+// 版权 @2023 凹语言 作者。保留所有权利。
+
+package lsp
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"io/ioutil"
+	"net/http"
+)
+
+type lspRequest struct {
+	ID      int           `json:"id"`
+	JSONRPC string        `json:"jsonrpc"`
+	Method  string        `json:"method"`
+	Params  []interface{} `json:"params"`
+}
+
+type lspResponse struct {
+	ID      int             `json:"id"`
+	JSONRPC string          `json:"jsonrpc"`
+	Result  json.RawMessage `json:"result"`
+	Error   *lspError       `json:"error"`
+}
+
+// JSONRPC错误
+type lspError struct {
+	Code    int    `json:"code"`
+	Message string `json:"message"`
+}
+
+func (err *lspError) Error() string {
+	return fmt.Sprintf("lsp.Error{code:%d, message: %q}", err.Code, err.Message)
+}
+
+// 原生调用方法
+func lspCall(host, method string, args ...interface{}) (result json.RawMessage, err error) {
+	return jsonrpcCall(host, method, args...)
+}
+
+// jsonrpc 调用
+func jsonrpcCall(host, method string, args ...interface{}) (result json.RawMessage, err error) {
+	reqBody, err := json.Marshal(&lspRequest{
+		JSONRPC: "2.0",
+		Method:  method,
+		Params:  args,
+		ID:      1,
+	})
+	if err != nil {
+		return nil, err
+	}
+
+	r, err := http.Post(host, "application/json", bytes.NewReader(reqBody))
+	if err != nil {
+		return nil, err
+	}
+	defer r.Body.Close()
+
+	respBody, err := ioutil.ReadAll(r.Body)
+	if err != nil {
+		return nil, err
+	}
+
+	var resp = new(lspResponse)
+	if err := json.Unmarshal(respBody, resp); err != nil {
+		return nil, err
+	}
+	if resp.Error != nil {
+		return nil, resp.Error
+	}
+
+	return resp.Result, nil
+}
+
+// JSONRPC调用, 需要通过response提供返回类型
+func lsprpcCall(host, method string, response interface{}, args ...interface{}) (err error) {
+	resp_Result, err := jsonrpcCall(host, method, args...)
+	if err != nil {
+		return err
+	}
+	if err := json.Unmarshal(resp_Result, response); err != nil {
+		return err
+	}
+	return nil
+}