feat: add ToMap method and enhance OpenAI request handling

dto/openai_request.go

@@ -2,6 +2,7 @@ package dto
 
 import (
 	"encoding/json"
+	"one-api/common"
 	"strings"
 )
 
@@ -57,6 +58,13 @@ type GeneralOpenAIRequest struct {
 	WebSearchOptions *WebSearchOptions `json:"web_search_options,omitempty"`
 }
 
+func (r *GeneralOpenAIRequest) ToMap() map[string]any {
+	result := make(map[string]any)
+	data, _ := common.EncodeJson(r)
+	_ = common.DecodeJson(data, &result)
+	return result
+}
+
 type ToolCallRequest struct {
 	ID       string          `json:"id,omitempty"`
 	Type     string          `json:"type"`
@@ -74,11 +82,11 @@ type StreamOptions struct {
 	IncludeUsage bool `json:"include_usage,omitempty"`
 }
 
-func (r GeneralOpenAIRequest) GetMaxTokens() int {
+func (r *GeneralOpenAIRequest) GetMaxTokens() int {
 	return int(r.MaxTokens)
 }
 
-func (r GeneralOpenAIRequest) ParseInput() []string {
+func (r *GeneralOpenAIRequest) ParseInput() []string {
 	if r.Input == nil {
 		return nil
 	}