Go Gin 实现文件的上传下载流读取
文件上传
router
router.POST("/resources/common/upload", service.UploadResource)
service
type: POST
data:{ “saveDir”:“保存的路径”, “fileName”:“文件名称不带后缀” }
// 上传文件 func UploadResource(c *gin.Context) { saveDirParam := c.PostForm("saveDir") // 文件目录 fileNameParam := c.PostForm("fileName") // 文件名称 //目录 var saveDir = "" //名称 var saveName = "" //完整路径 var savePath = "" //获取文件 file, header, errFile := c.Request.FormFile("file") //处理获取文件错误 if errFile != nil || common.IsEmpty(header.Filename) { c.JSON(http.StatusOK, gin.H{ "success": false, "message": "请选择文件", "dir": saveDir, "name": saveName, "path": savePath, }) return } //目录请求参数为空 if common.IsEmpty(saveDirParam) { c.JSON(http.StatusOK, gin.H{ "success": false, "message": "请求参数错误!", "dir": saveDir, "name": saveName, "path": savePath, }) return } //如果上传的名称为空,则自动生成名称 if common.IsEmpty(fileNameParam) { fileNameParam = GenerateResourceNo() } //获取上传文件的后缀(类型) uploadFileNameWithSuffix := path.Base(header.Filename) uploadFileType := path.Ext(uploadFileNameWithSuffix) //文件保存目录 saveDir = "/attachment" + saveDirParam //保存的文件名称 saveName = fileNameParam + uploadFileType savePath = saveDir + "/" + saveName //打开目录 localFileInfo, fileStatErr := os.Stat(saveDir) //目录不存在 if fileStatErr != nil || !localFileInfo.IsDir() { //创建目录 errByMkdirAllDir := os.MkdirAll(saveDir, 0755) if errByMkdirAllDir != nil { logs.Error("%s mkdir error.....", saveDir, errByMkdirAllDir.Error()) c.JSON(http.StatusOK, gin.H{ "success": false, "dir": saveDir, "name": saveName, "path": savePath, "message": "创建目录失败", }) return } } ////上传文件前 先删除该资源之前上传过的资源文件 ////(编辑-重新选择文件-需要先删除该资源之前上传过的资源文件) ////该代码执行的条件----上传的名称是唯一的,否则会出现误删 ////获取文件的前缀 //fileNameOnly := fileNameParam //deleteFileWithName(fileNameOnly, saveDir) //deleteFileWithName(fileNameOnly, model.WebConfig.ResourcePath+"/"+ // model.WebConfig.WebConvertToPath) out, err := os.Create(savePath) if err != nil { logs.Error(err) } defer out.Close() _, err = io.Copy(out, file) if err != nil { c.JSON(http.StatusOK, gin.H{ "success": false, "dir": saveDir, "name": saveName, "path": savePath, "message": err.Error(), }) return } //没有错误的情况下 c.JSON(http.StatusOK, gin.H{ "success": true, "dir": saveDir, "name": saveName, "path": savePath, "message": "上传成功", }) return }
js提交例子:
注:需导入jquery.js 和 ajaxfileupload.js
//上传文件 $.ajaxFileUpload( { url: '/resources/common/upload', //用于文件上传的服务器端请求地址 secureuri: false, //是否需要安全协议,一般设置为false fileElementId: fileUploadDomId, //文件上传域的ID data: { "saveDir":fileSaveDir, "fileName":fileSaveName }, dataType: 'json', //返回值类型 一般设置为json contentType:'application/json',//提交的数据类型 async: false, success: function (data, status) //服务器成功响应处理函数 { if (data.success){ fileSaveName=fileSaveDir+"/"+data.name; console.log("上传成功,返回的文件的路径:",fileSaveName) }else{ console.log("上传失败,返回的文件的路径:",fileSaveName) return } }, error: function (data, status, e)//服务器响应失败处理函数 { console.log("e==",e); return } } );
文件的下载
router
Type:‘GET'
普通链接格式非restful风格
参数url:下载的文件的路径
- Jquery解码:decodeURIComponent(url);
- Jquery编码:encodeURIComponent(url);
例:http://127.0.0.0.1:8080//pub/common/download?url=“/attachment/demo.docx”
router.GET("/pub/common/download", service.PubResFileStreamGetService)
service
//下载次数 func UserFileDownloadCommonService(c *gin.Context) { filePath := c.Query("url") //打开文件 fileTmp, errByOpenFile := os.Open(filePath) defer fileTmp.Close() //获取文件的名称 fileName:=path.Base(filePath) if common.IsEmpty(filePath) || common.IsEmpty(fileName) || errByOpenFile != nil { logs.Error("获取文件失败") c.Redirect(http.StatusFound, "/404") return } c.Header("Content-Type", "application/octet-stream") //强制浏览器下载 c.Header("Content-Disposition", "attachment; filename="+fileName) //浏览器下载或预览 c.Header("Content-Disposition", "inline;filename="+fileName) c.Header("Content-Transfer-Encoding", "binary") c.Header("Cache-Control", "no-cache") c.File(filePath) return }
文件流读取
router
Type:‘GET'
普通链接格式非restful风格
参数url:下载的文件的路径
- Jquery解码:decodeURIComponent(url);
- Jquery编码:encodeURIComponent(url);
例:http://127.0.0.0.1:8080//pub/common/file_stream?url=“/attachment/demo.docx”
router.GET("/pub/common/file_stream", service.PubResFileStreamGetService)
service
//map for Http Content-Type Http 文件类型对应的content-Type var HttpContentType = map[string]string{ ".avi": "video/avi", ".mp3": " audio/mp3", ".mp4": "video/mp4", ".wmv": " video/x-ms-wmv", ".asf": "video/x-ms-asf", ".rm": "application/vnd.rn-realmedia", ".rmvb": "application/vnd.rn-realmedia-vbr", ".mov": "video/quicktime", ".m4v": "video/mp4", ".flv": "video/x-flv", ".jpg": "image/jpeg", ".png": "image/png", } //根据文件路径读取返回流文件 参数url func PubResFileStreamGetService(c *gin.Context) { filePath := c.Query("url") //获取文件名称带后缀 fileNameWithSuffix := path.Base(filePath) //获取文件的后缀 fileType := path.Ext(fileNameWithSuffix) //获取文件类型对应的http ContentType 类型 fileContentType := HttpContentType[fileType] if common.IsEmpty(fileContentType) { c.String(http.StatusNotFound, "file http contentType not found") return } c.Header("Content-Type", fileContentType) c.File(filePath) }