89 lines
2.1 KiB
Go
89 lines
2.1 KiB
Go
package handlers
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import (
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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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"go.uber.org/zap"
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"tyapi-server/internal/shared/interfaces"
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"tyapi-server/internal/shared/pdf"
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)
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// PDFGHandler PDFG处理器
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type PDFGHandler struct {
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cacheManager *pdf.PDFCacheManager
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responseBuilder interfaces.ResponseBuilder
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logger *zap.Logger
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}
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// NewPDFGHandler 创建PDFG处理器
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func NewPDFGHandler(
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cacheManager *pdf.PDFCacheManager,
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responseBuilder interfaces.ResponseBuilder,
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logger *zap.Logger,
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) *PDFGHandler {
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return &PDFGHandler{
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cacheManager: cacheManager,
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responseBuilder: responseBuilder,
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logger: logger,
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}
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}
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// DownloadPDF 下载PDF文件
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// GET /api/v1/pdfg/download?id=报告ID
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func (h *PDFGHandler) DownloadPDF(c *gin.Context) {
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reportID := c.Query("id")
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if reportID == "" {
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h.responseBuilder.BadRequest(c, "报告ID不能为空")
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return
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}
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// 从缓存获取PDF
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pdfBytes, hit, createdAt, err := h.cacheManager.GetByCacheKey(reportID)
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if err != nil {
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h.logger.Error("获取PDF缓存失败",
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zap.String("report_id", reportID),
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zap.Error(err),
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)
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h.responseBuilder.InternalError(c, "获取PDF文件失败")
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return
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}
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if !hit {
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h.logger.Warn("PDF文件不存在或已过期",
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zap.String("report_id", reportID),
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)
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h.responseBuilder.NotFound(c, "PDF文件不存在或已过期，请重新生成")
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return
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}
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// 检查是否过期（从文件生成时间开始算24小时）
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expiresAt := createdAt.Add(24 * time.Hour)
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if time.Now().After(expiresAt) {
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h.logger.Warn("PDF文件已过期",
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zap.String("report_id", reportID),
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zap.Time("expires_at", expiresAt),
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)
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h.responseBuilder.NotFound(c, "PDF文件已过期，请重新生成")
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return
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}
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// 设置响应头
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c.Header("Content-Type", "application/pdf")
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c.Header("Content-Disposition", `attachment; filename="大数据租赁风险报告.pdf"`)
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c.Header("Content-Length", fmt.Sprintf("%d", len(pdfBytes)))
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// 发送PDF文件
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c.Data(http.StatusOK, "application/pdf", pdfBytes)
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h.logger.Info("PDF文件下载成功",
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zap.String("report_id", reportID),
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zap.Int("file_size", len(pdfBytes)),
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)
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}
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