个人中心
gpt4 book ai didi

Golang Gin框架实现文件下载功能的示例代码

转载 作者：qq735679552 更新时间：2022-09-28 22:32:09 32 4
gpt4 key购买 nike

CFSDN坚持开源创造价值，我们致力于搭建一个资源共享平台，让每一个IT人在这里找到属于你的精彩世界.

这篇CFSDN的博客文章Golang Gin框架实现文件下载功能的示例代码由作者收集整理，如果你对这篇文章有兴趣，记得点赞哟.

Layui框架实现文件上传

基本的思路就是随便创建一个元素，然后使用layui的upload组件对创建的元素进行渲染，详见代码 。

?
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
<!DOCTYPE html>
< html lang = "en" >
< head >
     < script src = "jquery-3.5.0.min.js" type = "text/javascript" ></ script > <!-- jquery包，记得替换为你本地的路径 -->
 
     < link rel = "stylesheet" href = "layui/css/layui.css" rel = "external nofollow" > <!--layui框架的样式库 同样你本地的路径 -->
     < script src = "pkg/layui/layui.js" ></ script > <!--enmmm 没错，路径-->
</ head >  
< body >
<!-- 这里我是用的a标签，当然你可以使用别的 label、button等均可-->
  < a href = "javascript:(0);" rel = "external nofollow"  id = "attachment-upload" >+添加附件</ a >
</ body >
< script >
     //以layui.js的方式引入使用时需要手动加载layui的组件
     layui.use(['layer','upload'],function(){ // PS：个人理解，该行只是为了引入layui框架的组件，html文件加载完毕后执行，内部的代码和直接写在script标签内没啥区别，只是可以在代码中使用layer了
     // 此处引入layer只是为了打印一些东西
         var layer = layui.layer,
         upload = layui.upload;
        
     // 渲染元素，使其支持文件上传
     // 详情请移步 https://www.layui.com/doc/modules/upload.html
     // https://www.layui.com/demo/upload.html
      upload.render({
             elem: '#attachment-upload', // 感觉利用了jquery的id选择器，这里用#id(上传附件的标签、按钮值类型元素id)就可以了
             url: dev_url + "fc/upload", // 后端接收上传文件的接口地址
             headers: {   // 这里官方文档中没有，是在请求后端接口时在request header中增加一些请求参数，实测可行
                 'api_token': uInfo
             },
             accept: 'file', // 这里可以限定支持上传文件的类型，详见文档
             done: function (res) { // 调用后端上传文件接口后的返回
            // 这里解析下后端的返回字段，具体怎么着看业务吧
                 if (res.success == false) {
                     layer.msg("上传文件失败!" + res.msg);
                 }
         });
})
</ script >
</ html >

PS：注意下使用layui上传文件的请求格式为multiply/form-data，参数为file,(binary)格式 。

Golang Gin框架实现文件下载功能的示例代码

Gin框架获取前端上传的文件

?
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
func UploadFileControl(c *gin.Context) {
     logrus.Infof( "[UploadFileControl] user_id =%d" , userId)
     // GIN框架获取前端上传文件
     // 这里的参数其实是上传文件时的字段名，也就是上面图片中的file，如果前端是自己定义的其他字段名，需要替换下
     uploadFile, fileHeader, err := c.Request.FormFile( "file" )
     if err != nil {
         c.JSON(http.StatusOK, gin.H{
             "success" : false ,
             "msg" :     "获取文件信息失败!" + err.Error(),
         })
     }
     if uploadFile != nil { // 记得及时关闭文件，避免内存泄漏
         defer uploadFile.Close()
     }
 
// 读取上传文件的内容
// 其实这里直接读取所有不太合理,如果文件过大时会占用很多内存，可以考虑使用缓冲区读取
     fileContent, err := ioutil.ReadAll(uploadFile)
     if err != nil {
         c.JSON(http.StatusOK, gin.H{
             "success" : false ,
             "msg" :     "读取文件内容失败!" + err.Error(),
         })
     }
 
// 接受到文件后的处理方式，可以保存到本地，也可以上传到文件对象，看自己了
     /*fileId, err := oss.GetOssClient().UploadFile(userId, fileHeader.Filename, fileContent)
     if err != nil {
         logrus.Errorf("[UploadFile] error,user_id = %d,err_msg= %s", userId, err.Error())
         c.JSON(http.StatusOK, gin.H{
             "success": false,
             "msg":     "上传文件失败!请稍后再试",
         })
     }*/
 
// 这里向前端返回下上传成功的信息
     c.JSON(http.StatusOK, gin.H{
         "success" :   true ,
         "msg" :       "" ,
     })
}

Gin框架的文件下载

        Response Header中的Content-Type指定了服务器端返回数据的类型，浏览器自己是可以处理这些类型的，当返回的数据为文件类型时，浏览器会自行下载。具体的类型和content-type的对应方式可见 。

  。

文件扩展名 Content-Type(Mime-Type) 文件扩展名 Content-Type(Mime-Type)
.*（ 二进制流，不知道下载文件类型） application/octet-stream .tif image/tiff
.001 application/x-001 .301 application/x-301
.323 text/h323 .906 application/x-906
.907 drawing/907 .a11 application/x-a11
.acp audio/x-mei-aac .ai application/postscript
.aif audio/aiff .aifc audio/aiff
.aiff audio/aiff .anv application/x-anv
.asa text/asa .asf video/x-ms-asf
.asp text/asp .asx video/x-ms-asf
.au audio/basic .avi video/avi
.awf application/vnd.adobe.workflow .biz text/xml
.bmp application/x-bmp .bot application/x-bot
.c4t application/x-c4t .c90 application/x-c90
.cal application/x-cals .cat application/vnd.ms-pki.seccat
.cdf application/x-netcdf .cdr application/x-cdr
.cel application/x-cel .cer application/x-x509-ca-cert
.cg4 application/x-g4 .cgm application/x-cgm
.cit application/x-cit .class java/*
.cml text/xml .cmp application/x-cmp
.cmx application/x-cmx .cot application/x-cot
.crl application/pkix-crl .crt application/x-x509-ca-cert
.csi application/x-csi .css text/css
.cut application/x-cut .dbf application/x-dbf
.dbm application/x-dbm .dbx application/x-dbx
.dcd text/xml .dcx application/x-dcx
.der application/x-x509-ca-cert .dgn application/x-dgn
.dib application/x-dib .dll application/x-msdownload
.doc application/msword .dot application/msword
.drw application/x-drw .dtd text/xml
.dwf Model/vnd.dwf .dwf application/x-dwf
.dwg application/x-dwg .dxb application/x-dxb
.dxf application/x-dxf .edn application/vnd.adobe.edn
.emf application/x-emf .eml message/rfc822
.ent text/xml .epi application/x-epi
.eps application/x-ps .eps application/postscript
.etd application/x-ebx .exe application/x-msdownload
.fax image/fax .fdf application/vnd.fdf
.fif application/fractals .fo text/xml
.frm application/x-frm .g4 application/x-g4
.gbr application/x-gbr . application/x-
.gif image/gif .gl2 application/x-gl2
.gp4 application/x-gp4 .hgl application/x-hgl
.hmr application/x-hmr .hpg application/x-hpgl
.hpl application/x-hpl .hqx application/mac-binhex40
.hrf application/x-hrf .hta application/hta
.htc text/x-component .htm text/html
.html text/html .htt text/webviewhtml
.htx text/html .icb application/x-icb
.ico image/x-icon .ico application/x-ico
.iff application/x-iff .ig4 application/x-g4
.igs application/x-igs .iii application/x-iphone
.img application/x-img .ins application/x-internet-signup
.isp application/x-internet-signup .IVF video/x-ivf
.java java/* .jfif image/jpeg
.jpe image/jpeg .jpe application/x-jpe
.jpeg image/jpeg .jpg image/jpeg
.jpg application/x-jpg .js application/x-javascript
.jsp text/html .la1 audio/x-liquid-file
.lar application/x-laplayer-reg .latex application/x-latex
.lavs audio/x-liquid-secure .lbm application/x-lbm
.lmsff audio/x-la-lms .ls application/x-javascript
.ltr application/x-ltr .m1v video/x-mpeg
.m2v video/x-mpeg .m3u audio/mpegurl
.m4e video/mpeg4 .mac application/x-mac
.man application/x-troff-man .math text/xml
.mdb application/msaccess .mdb application/x-mdb
.mfp application/x-shockwave-flash .mht message/rfc822
.mhtml message/rfc822 .mi application/x-mi
.mid audio/mid .midi audio/mid
.mil application/x-mil .mml text/xml
.mnd audio/x-musicnet-download .mns audio/x-musicnet-stream
.mocha application/x-javascript .movie video/x-sgi-movie
.mp1 audio/mp1 .mp2 audio/mp2
.mp2v video/mpeg .mp3 audio/mp3
.mp4 video/mpeg4 .mpa video/x-mpg
.mpd application/vnd.ms-project .mpe video/x-mpeg
.mpeg video/mpg .mpg video/mpg
.mpga audio/rn-mpeg .mpp application/vnd.ms-project
.mps video/x-mpeg .mpt application/vnd.ms-project
.mpv video/mpg .mpv2 video/mpeg
.mpw application/vnd.ms-project .mpx application/vnd.ms-project
.mtx text/xml .mxp application/x-mmxp
.net image/pnetvue .nrf application/x-nrf
.nws message/rfc822 .odc text/x-ms-odc
.out application/x-out .p10 application/pkcs10
.p12 application/x-pkcs12 .p7b application/x-pkcs7-certificates
.p7c application/pkcs7-mime .p7m application/pkcs7-mime
.p7r application/x-pkcs7-certreqresp .p7s application/pkcs7-signature
.pc5 application/x-pc5 .pci application/x-pci
.pcl application/x-pcl .pcx application/x-pcx
.pdf application/pdf .pdf application/pdf
.pdx application/vnd.adobe.pdx .pfx application/x-pkcs12
.pgl application/x-pgl .pic application/x-pic
.pko application/vnd.ms-pki.pko .pl application/x-perl
.plg text/html .pls audio/scpls
.plt application/x-plt .png image/png
.png application/x-png .pot application/vnd.ms-powerpoint
.ppa application/vnd.ms-powerpoint .ppm application/x-ppm
.pps application/vnd.ms-powerpoint .ppt application/vnd.ms-powerpoint
.ppt application/x-ppt .pr application/x-pr
.prf application/pics-rules .prn application/x-prn
.prt application/x-prt .ps application/x-ps
.ps application/postscript .ptn application/x-ptn
.pwz application/vnd.ms-powerpoint .r3t text/vnd.rn-realtext3d
.ra audio/vnd.rn-realaudio .ram audio/x-pn-realaudio
.ras application/x-ras .rat application/rat-file
.rdf text/xml .rec application/vnd.rn-recording
.red application/x-red .rgb application/x-rgb
.rjs application/vnd.rn-realsystem-rjs .rjt application/vnd.rn-realsystem-rjt
.rlc application/x-rlc .rle application/x-rle
.rm application/vnd.rn-realmedia .rmf application/vnd.adobe.rmf
.rmi audio/mid .rmj application/vnd.rn-realsystem-rmj
.rmm audio/x-pn-realaudio .rmp application/vnd.rn-rn_music_package
.rms application/vnd.rn-realmedia-secure .rmvb application/vnd.rn-realmedia-vbr
.rmx application/vnd.rn-realsystem-rmx .rnx application/vnd.rn-realplayer
.rp image/vnd.rn-realpix .rpm audio/x-pn-realaudio-plugin
.rsml application/vnd.rn-rsml .rt text/vnd.rn-realtext
.rtf application/msword .rtf application/x-rtf
.rv video/vnd.rn-realvideo .sam application/x-sam
.sat application/x-sat .sdp application/sdp
.sdw application/x-sdw .sit application/x-stuffit
.slb application/x-slb .sld application/x-sld
.slk drawing/x-slk .smi application/smil
.smil application/smil .smk application/x-smk
.snd audio/basic .sol text/plain
.sor text/plain .spc application/x-pkcs7-certificates
.spl application/futuresplash .spp text/xml
.ssm application/streamingmedia .sst application/vnd.ms-pki.certstore
.stl application/vnd.ms-pki.stl .stm text/html
.sty application/x-sty .svg text/xml
.swf application/x-shockwave-flash .tdf application/x-tdf
.tg4 application/x-tg4 .tga application/x-tga
.tif image/tiff .tif application/x-tif
.tiff image/tiff .tld text/xml
.top drawing/x-top .torrent application/x-bittorrent
.tsd text/xml .txt text/plain
.uin application/x-icq .uls text/iuls
.vcf text/x-vcard .vda application/x-vda
.vdx application/vnd.visio .vml text/xml
.vpg application/x-vpeg005 .vsd application/vnd.visio
.vsd application/x-vsd .vss application/vnd.visio
.vst application/vnd.visio .vst application/x-vst
.vsw application/vnd.visio .vsx application/vnd.visio
.vtx application/vnd.visio .vxml text/xml
.wav audio/wav .wax audio/x-ms-wax
.wb1 application/x-wb1 .wb2 application/x-wb2
.wb3 application/x-wb3 .wbmp image/vnd.wap.wbmp
.wiz application/msword .wk3 application/x-wk3
.wk4 application/x-wk4 .wkq application/x-wkq
.wks application/x-wks .wm video/x-ms-wm
.wma audio/x-ms-wma .wmd application/x-ms-wmd
.wmf application/x-wmf .wml text/vnd.wap.wml
.wmv video/x-ms-wmv .wmx video/x-ms-wmx
.wmz application/x-ms-wmz .wp6 application/x-wp6
.wpd application/x-wpd .wpg application/x-wpg
.wpl application/vnd.ms-wpl .wq1 application/x-wq1
.wr1 application/x-wr1 .wri application/x-wri
.wrk application/x-wrk .ws application/x-ws
.ws2 application/x-ws .wsc text/scriptlet
.wsdl text/xml .wvx video/x-ms-wvx
.xdp application/vnd.adobe.xdp .xdr text/xml
.xfd application/vnd.adobe.xfd .xfdf application/vnd.adobe.xfdf
.xhtml text/html .xls application/vnd.ms-excel
.xls application/x-xls .xlw application/x-xlw
.xml text/xml .xpl audio/scpls
.xq text/xml .xql text/xml
.xquery text/xml .xsd text/xml
.xsl text/xml .xslt text/xml
.xwd application/x-xwd .x_b application/x-x_b
.sis application/vnd.symbian.install .sisx application/vnd.symbian.install
.x_t application/x-x_t .ipa application/vnd.iphone
.apk application/vnd.android.package-archive .xap application/x-silverlight-app

  。

        当Content-Type是一些文件类型时，使用Content-Disposition可以指定浏览器下载文件时的默认文件名         因此，我们想要使用gin实现下载文件的功能，只需要在接口返回时设置Response-Header中的Content-Type为文件类型，并设置Content-Disposition指定默认的文件名，然后将文件数据返回浏览器即可，具体代码如下:

?
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
func DownloadFileControl(c *gin.Context) {
     //  查询一些必要的参数 进行一些必要的验证
     attchIdStr := c.Query( "attachment_id" )
     attachmentName = c.Query( "attachment_name" )
    
     // 获取要返回的文件数据流
     // 看你文件存在哪里了，本地就直接os.Open就可以了，总之是要获取一个[]byte
     /*  fileContent, err := oss.GetOssClient().DownloadFile(req.AttachmentId, req.AttachmentName)
     if err != nil {
         logrus.Errorf("[DownloadFile] download file error,file_id = %d,file_name = %s,user_is = %d,err_msg= %s", req.UserId, req.AttachmentId, req.AttachmentName, err.Error())
         c.JSON(http.StatusOK, gin.H{
             "success": false,
             "msg":     "下载文件失败,请联系管理员",
         })
         return
     }*/
    
// 设置返回头并返回数据
     fileContentDisposition := "attachment;filename=\"" + attachmentName + "\""
     c.Header( "Content-Type" , "application/zip" ) // 这里是压缩文件类型 .zip
     c.Header( "Content-Disposition" , fileContentDisposition)
     c.Data(http.StatusOK, contentType, fileContent)

到此这篇关于Golang Gin框架实现文件下载功能的文章就介绍到这了,更多相关Gin框架文件下载内容请搜索我以前的文章或继续浏览下面的相关文章希望大家以后多多支持我！ 。

原文链接：https://blog.csdn.net/weixin_43823363/article/details/105946099 。

最后此篇关于Golang Gin框架实现文件下载功能的示例代码的文章就讲到这里了,如果你想了解更多关于Golang Gin框架实现文件下载功能的示例代码的内容请搜索CFSDN的文章或继续浏览相关文章，希望大家以后支持我的博客！ 。

32 4 0
文章推荐： go语言中五种字符串的拼接方式(小结)
文章推荐： python arcpy练习之面要素重叠拓扑检查
文章推荐： Python 带你快速上手 Apache APISIX 插件开发
文章推荐： go gin+token(JWT)验证实现登陆验证
qq735679552
个人简介

我是一名优秀的程序员,十分优秀！

滴滴打车优惠券免费领取
滴滴打车优惠券
Copyright 2021 - 2024 cfsdn All Rights Reserved 蜀ICP备2022000587号
广告合作:1813099741@qq.com 6ren.com