Merge branch 'hotfix/report_pdf_upload' of eta_server/eta_api into master

controllers/report.go

@@ -1286,8 +1286,11 @@ func (this *ReportUploadCommonController) UploadImg() {
 	}
 	pass := filetype.IsImage(fileData)
 	if !pass {
-		err = fmt.Errorf("文件格式有误")
-		return
+		kind, _ := filetype.Match(fileData)
+		if kind.Extension != "pdf" {
+			err = fmt.Errorf("文件格式有误")
+			return
+		}
 	}
 
 	ext := path.Ext(h.Filename)