gin框架 路由-文件上传(单个和多个)
★单个文件上传
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multipart/form-data格式用于文件上传
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gin文件上传与原生的net/http方法类似,不同在于gin把原生的request封装到c.Request中
html前端代码:
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <title>Document</title> </head> <body> <form action="http://localhost:8080/upload" method="post" enctype="multipart/form-data"> 上传文件:<input type="file" name="file" > <input type="submit" value="提交"> </form> </body> </html>
go后端代码:
package main import ( "net/http" "github.com/gin-gonic/gin" ) func main() { r := gin.Default() //限制上传最大尺寸 r.MaxMultipartMemory = 8 << 20 r.POST("/upload", func(c *gin.Context) { file, err := c.FormFile("file") if err != nil { c.String(500, "上传图片出错") } // c.JSON(200, gin.H{"message": file.Header.Context}) c.SaveUploadedFile(file, file.Filename) c.String(http.StatusOK, file.Filename) }) r.Run() }
★多个文件上传
html前端代码:
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <title>Document</title> </head> <body> <form action="http://localhost:8000/upload" method="post" enctype="multipart/form-data"> 上传文件:<input type="file" name="files" multiple> <input type="submit" value="提交"> </form> </body> </html>
go后台代码:
package main import ( "fmt" "net/http" "github.com/gin-gonic/gin" ) // gin的helloWorld func main() { // 1.创建路由 // 默认使用了2个中间件Logger(), Recovery() r := gin.Default() // 限制表单上传大小 8MB,默认为32MB r.MaxMultipartMemory = 8 << 20 r.POST("/upload", func(c *gin.Context) { form, err := c.MultipartForm() if err != nil { c.String(http.StatusBadRequest, fmt.Sprintf("get err %s", err.Error())) } // 获取所有图片 files := form.File["files"] // 遍历所有图片 for _, file := range files { // 逐个存 if err := c.SaveUploadedFile(file, file.Filename); err != nil { c.String(http.StatusBadRequest, fmt.Sprintf("upload err %s", err.Error())) return } } c.String(200, fmt.Sprintf("upload ok %d files", len(files))) }) //默认端口号是8080 r.Run(":8000") }