英文:
Golang services response file
问题
如何在Go中更高效地从服务返回文件？例如，我接收到一个文件，代码如下：
这是我用来从服务接收文件的示例代码：
func (b *BenefitListHandler) UploadAppend(w http.ResponseWriter, r *http.Request) {
r.ParseMultipartForm(32 << 20)
file, handler, err := r.FormFile("benefitlistuploadfile")
if err != nil {
libhttp.EncodeErrorResponse(w, err, http.StatusInternalServerError)
return
}
defer file.Close()
f, err := os.OpenFile("./"+handler.Filename, os.O_WRONLY|os.O_CREATE, 0666)
if err != nil {
libhttp.EncodeErrorResponse(w, err, http.StatusInternalServerError)
return
}
defer f.Close()
io.Copy(f, file)
go b.readFileAppend("./" + handler.Filename)
libhttp.EncodeOKResponse(w, true)
}
之后，我对如何从该请求中发送另一个文件（如二进制文件）以提高时间和资源消耗感到困惑。
英文:
How can I return a file from a service more efficiently in Go? For example, I receive a file like this
Here is an example that i use to receive a file from the service:
func (b *BenefitListHandler) UploadAppend(w http.ResponseWriter, r *http.Request) {
r.ParseMultipartForm(32 << 20)
file, handler, err := r.FormFile("benefitlistuploadfile")
if err != nil {
libhttp.EncodeErrorResponse(w, err, http.StatusInternalServerError)
return
}
defer file.Close()
f, err := os.OpenFile("./"+handler.Filename, os.O_WRONLY|os.O_CREATE, 0666)
if err != nil {
libhttp.EncodeErrorResponse(w, err, http.StatusInternalServerError)
return
}
defer f.Close()
io.Copy(f, file)
go b.readFileAppend("./" + handler.Filename)
libhttp.EncodeOKResponse(w, true)}
After that, I am confused how I can send another file from that request like a binary, to improve the time and consumption.
答案1
得分: 2
在查看了问题的信息后，我得到了解决方案。
要指定一个作为文件的浏览器，我将以下标头添加到响应中：
w.Header().Set("Content-Disposition", "attachment; filename=文件名")
然后，我使用ioutil来读取文件：
files, err := ioutil.ReadFile(result)
最后，我使用http.ResponseWriter将文件的[]byte写入响应中：
w.Write(files)
英文:
after look information about the question i get that solution
to specify a browser that is a file i put that header to the response:
> w.Header().Set("Content-Disposition", "attachment;
> filename=NameOfFile")
after that i read the file with ioutil:
> files, err := ioutil.ReadFile(result)
and at the end i use the http.ResponseWriter to write the []byte of the file to the response
> w.Write(files)
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