675 lines
20 KiB
Go
675 lines
20 KiB
Go
package api
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import (
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"ai-gateway/internal/billing"
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"ai-gateway/internal/models"
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"ai-gateway/internal/scheduler"
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"bytes"
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"encoding/json"
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"fmt"
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"net/http"
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"time"
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"github.com/gin-gonic/gin"
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"gorm.io/gorm"
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)
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// APIHandler 持有数据库连接并处理API请求
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type APIHandler struct {
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DB *gorm.DB
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LogCleaner *scheduler.LogCleaner
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}
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// RequestLogListItem 精简的请求日志列表项（不包含RequestBody和ResponseBody）
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type RequestLogListItem struct {
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ID uint `json:"id"`
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APIKeyID uint `json:"api_key_id"`
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ProviderName string `json:"provider_name"`
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VirtualModelName string `json:"virtual_model_name"`
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BackendModelName string `json:"backend_model_name"`
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RequestTimestamp time.Time `json:"request_timestamp"`
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ResponseTimestamp time.Time `json:"response_timestamp"`
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StatusCode int `json:"status_code,omitempty"`
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ErrorMessage string `json:"error_message,omitempty"`
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RequestTokens int `json:"request_tokens"`
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ResponseTokens int `json:"response_tokens"`
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Cost float64 `json:"cost"`
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CreatedAt time.Time `json:"created_at"`
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}
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// HealthCheckHandler 健康检查端点（无需认证）
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func (h *APIHandler) HealthCheckHandler(c *gin.Context) {
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c.JSON(http.StatusOK, gin.H{
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"status": "ok",
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"timestamp": time.Now().Unix(),
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})
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}
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// ModelListResponse 符合OpenAI /v1/models API响应格式
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type ModelListResponse struct {
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Object string `json:"object"`
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Data []ModelData `json:"data"`
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}
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// ModelData 单个模型的数据结构
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type ModelData struct {
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ID string `json:"id"`
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Object string `json:"object"`
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Created int64 `json:"created"`
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OwnedBy string `json:"owned_by"`
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}
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// ChatCompletionRequest 聊天补全请求结构
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type ChatCompletionRequest struct {
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Model string `json:"model"`
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Messages []ChatCompletionMessage `json:"messages"`
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Stream bool `json:"stream,omitempty"`
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}
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// ChatCompletionMessage 聊天消息结构
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type ChatCompletionMessage struct {
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Role string `json:"role"`
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Content string `json:"content"`
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}
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// BackendChatCompletionRequest 是实际发送到后端模型的请求结构
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// 它只包含通用字段，以避免发送不被支持的参数
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type BackendChatCompletionRequest struct {
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Model string `json:"model"`
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Messages []ChatCompletionMessage `json:"messages"`
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Stream bool `json:"stream,omitempty"`
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}
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// ResponsesRequest /v1/responses 端点请求结构
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type ResponsesRequest struct {
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Model string `json:"model"`
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Input []ChatCompletionMessage `json:"input"`
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Stream bool `json:"stream,omitempty"`
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}
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// BackendModelAssociation 代表一个后端模型关联及其配置
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type BackendModelAssociation struct {
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BackendModelID uint `json:"backend_model_id" binding:"required"`
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Priority int `json:"priority" binding:"required"`
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CostThreshold float64 `json:"cost_threshold"`
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}
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// CreateVirtualModelRequest 创建虚拟模型的请求结构
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type CreateVirtualModelRequest struct {
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Name string `json:"name" binding:"required"`
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Description string `json:"description"`
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BackendModels []BackendModelAssociation `json:"backend_models"`
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}
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// UpdateVirtualModelRequest 更新虚拟模型的请求结构
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type UpdateVirtualModelRequest struct {
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Name string `json:"name" binding:"required"`
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Description string `json:"description"`
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BackendModels []BackendModelAssociation `json:"backend_models"`
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}
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// forwardRequest 转发请求到后端API
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func forwardRequest(backendURL string, apiKey string, requestBody []byte, userAgent string) (*http.Response, error) {
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// 创建HTTP请求
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httpReq, err := http.NewRequest("POST", backendURL, bytes.NewReader(requestBody))
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if err != nil {
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return nil, fmt.Errorf("failed to create backend request: %w", err)
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}
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// 设置请求头
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httpReq.Header.Set("Content-Type", "application/json")
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httpReq.Header.Set("Authorization", "Bearer "+apiKey)
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// 设置User-Agent
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if userAgent != "" {
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httpReq.Header.Set("User-Agent", userAgent)
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}
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// 执行请求
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client := &http.Client{
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Timeout: 10 * time.Minute,
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}
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resp, err := client.Do(httpReq)
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if err != nil {
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return nil, fmt.Errorf("failed to connect to backend service: %w", err)
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}
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return resp, nil
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}
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// extractResponseTokenCount 从响应体中提取token数量
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func extractResponseTokenCount(responseBody []byte) int {
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var responseData map[string]interface{}
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if err := json.Unmarshal(responseBody, &responseData); err != nil {
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return 0
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}
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if choices, ok := responseData["choices"].([]interface{}); ok && len(choices) > 0 {
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if choice, ok := choices[0].(map[string]interface{}); ok {
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if message, ok := choice["message"].(map[string]interface{}); ok {
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if content, ok := message["content"].(string); ok {
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return billing.CalculateTextTokensSimple(content)
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}
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}
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}
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}
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return 0
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}
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// createRequestLog 创建请求日志记录
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func createRequestLog(apiKeyID uint, virtualModelName string, backendModel *models.BackendModel,
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requestTimestamp, responseTimestamp time.Time, requestTokenCount, responseTokenCount int,
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cost float64, requestBody, responseBody string) *models.RequestLog {
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return &models.RequestLog{
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APIKeyID: apiKeyID,
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VirtualModelName: virtualModelName,
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BackendModelName: backendModel.Name,
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ProviderName: backendModel.Provider.Name,
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RequestTimestamp: requestTimestamp,
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ResponseTimestamp: responseTimestamp,
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RequestTokens: requestTokenCount,
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ResponseTokens: responseTokenCount,
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Cost: cost,
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RequestBody: requestBody,
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ResponseBody: responseBody,
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}
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}
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// getAPIKeyID 从gin上下文中提取API Key ID
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func getAPIKeyID(c *gin.Context) uint {
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apiKeyValue, exists := c.Get("apiKey")
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if !exists {
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return 0
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}
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if apiKey, ok := apiKeyValue.(models.APIKey); ok {
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return apiKey.ID
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}
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return 0
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}
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// copyResponseHeaders 复制响应头到gin context
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func copyResponseHeaders(c *gin.Context, resp *http.Response) {
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for key, values := range resp.Header {
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for _, value := range values {
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c.Header(key, value)
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}
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}
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}
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// GetRequestLogsHandler 获取请求日志列表（精简版，不包含RequestBody和ResponseBody）
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func (h *APIHandler) GetRequestLogsHandler(c *gin.Context) {
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// 获取分页参数
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page := 1
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pageSize := 20
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if pageParam := c.Query("page"); pageParam != "" {
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fmt.Sscanf(pageParam, "%d", &page)
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}
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if pageSizeParam := c.Query("page_size"); pageSizeParam != "" {
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fmt.Sscanf(pageSizeParam, "%d", &pageSize)
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}
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if page < 1 {
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page = 1
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}
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if pageSize < 1 || pageSize > 100 {
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pageSize = 20
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}
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// 构建查询
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query := h.DB.Model(&models.RequestLog{})
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// 按时间范围过滤
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if startTime := c.Query("start_time"); startTime != "" {
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if t, err := time.Parse(time.RFC3339, startTime); err == nil {
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query = query.Where("request_timestamp >= ?", t)
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}
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}
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if endTime := c.Query("end_time"); endTime != "" {
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if t, err := time.Parse(time.RFC3339, endTime); err == nil {
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query = query.Where("request_timestamp <= ?", t)
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}
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}
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// 按虚拟模型名称过滤
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if virtualModel := c.Query("virtual_model"); virtualModel != "" {
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query = query.Where("virtual_model_name = ?", virtualModel)
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}
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// 按后端模型名称过滤
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if backendModel := c.Query("backend_model"); backendModel != "" {
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query = query.Where("backend_model_name = ?", backendModel)
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}
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// 获取总数
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var total int64
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if err := query.Count(&total).Error; err != nil {
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c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to count logs"})
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return
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}
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// 获取日志列表（完整数据）
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var logs []models.RequestLog
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offset := (page - 1) * pageSize
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if err := query.Order("request_timestamp DESC").Limit(pageSize).Offset(offset).Find(&logs).Error; err != nil {
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c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to fetch logs"})
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return
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}
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// 转换为精简DTO
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logItems := make([]RequestLogListItem, len(logs))
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for i, log := range logs {
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logItems[i] = RequestLogListItem{
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ID: log.ID,
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APIKeyID: log.APIKeyID,
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ProviderName: log.ProviderName,
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VirtualModelName: log.VirtualModelName,
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BackendModelName: log.BackendModelName,
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RequestTimestamp: log.RequestTimestamp,
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ResponseTimestamp: log.ResponseTimestamp,
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RequestTokens: log.RequestTokens,
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ResponseTokens: log.ResponseTokens,
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Cost: log.Cost,
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CreatedAt: log.CreatedAt,
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}
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}
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c.JSON(http.StatusOK, gin.H{
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"logs": logItems,
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"total": total,
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"page": page,
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"page_size": pageSize,
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"total_pages": (total + int64(pageSize) - 1) / int64(pageSize),
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})
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}
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// GetRequestLogDetailHandler 获取单个请求日志的完整详情（包含RequestBody和ResponseBody）
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func (h *APIHandler) GetRequestLogDetailHandler(c *gin.Context) {
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// 获取日志ID
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logID := c.Param("id")
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if logID == "" {
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c.JSON(http.StatusBadRequest, gin.H{"error": "Log ID is required"})
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return
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}
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// 查询日志
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var log models.RequestLog
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if err := h.DB.First(&log, logID).Error; err != nil {
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if err == gorm.ErrRecordNotFound {
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c.JSON(http.StatusNotFound, gin.H{"error": "Log not found"})
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return
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}
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c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to fetch log detail"})
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return
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}
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// 返回完整的日志信息
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c.JSON(http.StatusOK, log)
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}
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// GetRequestLogStatsHandler 获取请求日志统计信息
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func (h *APIHandler) GetRequestLogStatsHandler(c *gin.Context) {
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// 获取时间范围参数
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var startTime, endTime time.Time
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var err error
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if startTimeParam := c.Query("start_time"); startTimeParam != "" {
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startTime, err = time.Parse(time.RFC3339, startTimeParam)
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if err != nil {
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// 默认最近7天
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startTime = time.Now().AddDate(0, 0, -7)
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}
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} else {
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startTime = time.Now().AddDate(0, 0, -7)
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}
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if endTimeParam := c.Query("end_time"); endTimeParam != "" {
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endTime, err = time.Parse(time.RFC3339, endTimeParam)
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if err != nil {
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endTime = time.Now()
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}
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} else {
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endTime = time.Now()
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}
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// 统计总请求数
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var totalRequests int64
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h.DB.Model(&models.RequestLog{}).
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Where("request_timestamp BETWEEN ? AND ?", startTime, endTime).
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Count(&totalRequests)
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// 统计总成本
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var totalCost float64
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h.DB.Model(&models.RequestLog{}).
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Where("request_timestamp BETWEEN ? AND ?", startTime, endTime).
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Select("COALESCE(SUM(cost), 0)").
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Scan(&totalCost)
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// 统计总token数
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var totalTokens struct {
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RequestTokens int64
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ResponseTokens int64
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}
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h.DB.Model(&models.RequestLog{}).
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Where("request_timestamp BETWEEN ? AND ?", startTime, endTime).
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Select("COALESCE(SUM(request_tokens), 0) as request_tokens, COALESCE(SUM(response_tokens), 0) as response_tokens").
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Scan(&totalTokens)
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// 按虚拟模型统计
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type ModelStats struct {
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ModelName string `json:"model_name"`
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Count int64 `json:"count"`
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TotalCost float64 `json:"total_cost"`
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}
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var virtualModelStats []ModelStats
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h.DB.Model(&models.RequestLog{}).
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Where("request_timestamp BETWEEN ? AND ?", startTime, endTime).
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Select("virtual_model_name as model_name, COUNT(*) as count, COALESCE(SUM(cost), 0) as total_cost").
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Group("virtual_model_name").
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Order("count DESC").
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Limit(10).
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Scan(&virtualModelStats)
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// 按后端模型统计
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var backendModelStats []ModelStats
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h.DB.Model(&models.RequestLog{}).
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Where("request_timestamp BETWEEN ? AND ?", startTime, endTime).
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Select("backend_model_name as model_name, COUNT(*) as count, COALESCE(SUM(cost), 0) as total_cost").
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Group("backend_model_name").
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Order("count DESC").
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Limit(10).
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Scan(&backendModelStats)
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c.JSON(http.StatusOK, gin.H{
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"start_time": startTime,
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"end_time": endTime,
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"total_requests": totalRequests,
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"total_cost": totalCost,
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"total_request_tokens": totalTokens.RequestTokens,
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"total_response_tokens": totalTokens.ResponseTokens,
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"virtual_model_stats": virtualModelStats,
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"backend_model_stats": backendModelStats,
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})
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}
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// ClearRequestLogsHandler 清空请求日志
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func (h *APIHandler) ClearRequestLogsHandler(c *gin.Context) {
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// 获取查询参数
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olderThan := c.Query("older_than") // 清空多少天前的日志
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// 先查询当前总记录数（包括软删除的记录）
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var totalCountBefore int64
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h.DB.Unscoped().Model(&models.RequestLog{}).Count(&totalCountBefore)
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// 查询活跃记录数（不包括软删除的记录）
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var activeCountBefore int64
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h.DB.Model(&models.RequestLog{}).Count(&activeCountBefore)
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var startTime time.Time
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if olderThan != "" {
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// 解析天数
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var days int
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if _, err := fmt.Sscanf(olderThan, "%d", &days); err != nil {
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c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid older_than parameter, must be a number representing days"})
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return
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}
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if days < 0 {
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c.JSON(http.StatusBadRequest, gin.H{"error": "older_than must be 0 or greater"})
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return
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}
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// 如果是0天，要删除所有日志，不需要时间限制
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if days == 0 {
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// 使用Unscoped进行硬删除，真正删除记录而非软删除
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result := h.DB.Unscoped().Where("1 = 1").Delete(&models.RequestLog{})
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if result.Error != nil {
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c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to clear logs"})
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return
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}
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// 执行VACUUM来回收数据库空间
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vacuumError := ""
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if err := h.DB.Exec("VACUUM").Error; err != nil {
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vacuumError = fmt.Sprintf("VACUUM failed: %v", err)
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fmt.Printf("Warning: %s\n", vacuumError)
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}
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// 查询删除后的记录数
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var totalCountAfter int64
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h.DB.Unscoped().Model(&models.RequestLog{}).Count(&totalCountAfter)
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// 返回详细的删除信息
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response := gin.H{
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"message": "All logs cleared successfully with hard delete and vacuum",
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"deleted_count": result.RowsAffected,
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"older_than_days": olderThan,
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"total_count_before": totalCountBefore,
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"active_count_before": activeCountBefore,
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"total_count_after": totalCountAfter,
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"hard_delete": true,
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"vacuum_executed": vacuumError == "",
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}
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if vacuumError != "" {
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response["vacuum_error"] = vacuumError
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}
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c.JSON(http.StatusOK, response)
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return
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}
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startTime = time.Now().AddDate(0, 0, -days)
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} else {
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// 如果没有指定天数，默认清空30天前的日志
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startTime = time.Now().AddDate(0, 0, -30)
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}
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// 使用Unscoped执行硬删除操作，真正删除记录而非软删除
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result := h.DB.Unscoped().Where("created_at < ?", startTime).Delete(&models.RequestLog{})
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if result.Error != nil {
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c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to clear logs"})
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return
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}
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// 执行VACUUM来回收数据库空间
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vacuumError := ""
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if err := h.DB.Exec("VACUUM").Error; err != nil {
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vacuumError = fmt.Sprintf("VACUUM failed: %v", err)
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fmt.Printf("Warning: %s\n", vacuumError)
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}
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// 查询删除后的记录数
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var totalCountAfter int64
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h.DB.Unscoped().Model(&models.RequestLog{}).Count(&totalCountAfter)
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// 返回详细的删除信息
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response := gin.H{
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"message": "Logs cleared successfully with hard delete and vacuum",
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"deleted_count": result.RowsAffected,
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"older_than_days": olderThan,
|
||
"cutoff_time": startTime,
|
||
"total_count_before": totalCountBefore,
|
||
"active_count_before": activeCountBefore,
|
||
"total_count_after": totalCountAfter,
|
||
"hard_delete": true,
|
||
"vacuum_executed": vacuumError == "",
|
||
}
|
||
if vacuumError != "" {
|
||
response["vacuum_error"] = vacuumError
|
||
}
|
||
|
||
c.JSON(http.StatusOK, response)
|
||
}
|
||
|
||
|
||
// GetLogCleanerStatusHandler 获取日志清理器状态
|
||
func (h *APIHandler) GetLogCleanerStatusHandler(c *gin.Context) {
|
||
if h.LogCleaner == nil {
|
||
c.JSON(http.StatusOK, gin.H{
|
||
"enabled": false,
|
||
"message": "Log cleaner is not initialized",
|
||
})
|
||
return
|
||
}
|
||
|
||
config := h.LogCleaner.GetConfig()
|
||
nextExecuteTime := h.LogCleaner.GetNextExecuteTime()
|
||
|
||
c.JSON(http.StatusOK, gin.H{
|
||
"enabled": config.Enabled,
|
||
"execute_time": config.ExecuteTime,
|
||
"retention_days": config.RetentionDays,
|
||
"check_interval": config.CheckInterval,
|
||
"next_execute_time": nextExecuteTime.Format("2006-01-02 15:04:05"),
|
||
"time_until_next": time.Until(nextExecuteTime).String(),
|
||
})
|
||
}
|
||
|
||
// ForceLogCleanupHandler 手动触发日志清理
|
||
func (h *APIHandler) ForceLogCleanupHandler(c *gin.Context) {
|
||
if h.LogCleaner == nil {
|
||
c.JSON(http.StatusServiceUnavailable, gin.H{
|
||
"error": "Log cleaner is not initialized",
|
||
})
|
||
return
|
||
}
|
||
|
||
// 执行清理
|
||
report := h.LogCleaner.ForceCleanup()
|
||
|
||
// 返回清理报告
|
||
c.JSON(http.StatusOK, gin.H{
|
||
"message": "Manual log cleanup completed",
|
||
"execute_time": report.ExecuteTime.Format("2006-01-02 15:04:05"),
|
||
"duration": report.Duration.String(),
|
||
"deleted_count": report.DeletedCount,
|
||
"total_count_before": report.TotalCountBefore,
|
||
"active_count_before": report.ActiveCountBefore,
|
||
"total_count_after": report.TotalCountAfter,
|
||
"cutoff_time": report.CutoffTime.Format("2006-01-02 15:04:05"),
|
||
"vacuum_duration": report.VacuumDuration.String(),
|
||
"vacuum_error": report.VacuumError,
|
||
"success": report.Success,
|
||
})
|
||
}
|
||
|
||
|
||
// ============ API Key 管理相关处理器 ============
|
||
|
||
// APIKeyListResponse API Key列表响应
|
||
type APIKeyListResponse struct {
|
||
ID uint `json:"id"`
|
||
Key string `json:"key"`
|
||
CreatedAt time.Time `json:"created_at"`
|
||
}
|
||
|
||
// GetAPIKeysHandler 获取所有API Key列表
|
||
func (h *APIHandler) GetAPIKeysHandler(c *gin.Context) {
|
||
var apiKeys []models.APIKey
|
||
|
||
// 查询所有API Key
|
||
if err := h.DB.Order("created_at DESC").Find(&apiKeys).Error; err != nil {
|
||
c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to fetch API keys"})
|
||
return
|
||
}
|
||
|
||
// 转换为响应格式
|
||
response := make([]APIKeyListResponse, len(apiKeys))
|
||
for i, key := range apiKeys {
|
||
response[i] = APIKeyListResponse{
|
||
ID: key.ID,
|
||
Key: key.Key,
|
||
CreatedAt: key.CreatedAt,
|
||
}
|
||
}
|
||
|
||
c.JSON(http.StatusOK, gin.H{
|
||
"api_keys": response,
|
||
"total": len(response),
|
||
})
|
||
}
|
||
|
||
// CreateAPIKeyRequest 创建API Key的请求结构
|
||
type CreateAPIKeyRequest struct {
|
||
Key string `json:"key" binding:"required"`
|
||
}
|
||
|
||
// CreateAPIKeyHandler 创建新的API Key
|
||
func (h *APIHandler) CreateAPIKeyHandler(c *gin.Context) {
|
||
var req CreateAPIKeyRequest
|
||
|
||
// 解析请求
|
||
if err := c.ShouldBindJSON(&req); err != nil {
|
||
c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid request format: " + err.Error()})
|
||
return
|
||
}
|
||
|
||
// 验证Key不为空
|
||
if req.Key == "" {
|
||
c.JSON(http.StatusBadRequest, gin.H{"error": "API key cannot be empty"})
|
||
return
|
||
}
|
||
|
||
// 检查Key是否已存在
|
||
var existingKey models.APIKey
|
||
if err := h.DB.Where("key = ?", req.Key).First(&existingKey).Error; err == nil {
|
||
c.JSON(http.StatusConflict, gin.H{"error": "API key already exists"})
|
||
return
|
||
}
|
||
|
||
// 创建新的API Key
|
||
newAPIKey := models.APIKey{
|
||
Key: req.Key,
|
||
}
|
||
|
||
if err := h.DB.Create(&newAPIKey).Error; err != nil {
|
||
c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to create API key"})
|
||
return
|
||
}
|
||
|
||
// 返回创建的API Key
|
||
c.JSON(http.StatusCreated, gin.H{
|
||
"message": "API key created successfully",
|
||
"api_key": APIKeyListResponse{
|
||
ID: newAPIKey.ID,
|
||
Key: newAPIKey.Key,
|
||
CreatedAt: newAPIKey.CreatedAt,
|
||
},
|
||
})
|
||
}
|
||
|
||
// DeleteAPIKeyHandler 删除指定的API Key
|
||
func (h *APIHandler) DeleteAPIKeyHandler(c *gin.Context) {
|
||
// 获取API Key ID
|
||
keyID := c.Param("id")
|
||
if keyID == "" {
|
||
c.JSON(http.StatusBadRequest, gin.H{"error": "API key ID is required"})
|
||
return
|
||
}
|
||
|
||
// 查找API Key
|
||
var apiKey models.APIKey
|
||
if err := h.DB.First(&apiKey, keyID).Error; err != nil {
|
||
if err == gorm.ErrRecordNotFound {
|
||
c.JSON(http.StatusNotFound, gin.H{"error": "API key not found"})
|
||
return
|
||
}
|
||
c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to find API key"})
|
||
return
|
||
}
|
||
|
||
// 删除API Key
|
||
if err := h.DB.Delete(&apiKey).Error; err != nil {
|
||
c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to delete API key"})
|
||
return
|
||
}
|
||
|
||
c.JSON(http.StatusOK, gin.H{
|
||
"message": "API key deleted successfully",
|
||
"id": apiKey.ID,
|
||
})
|
||
}
|