Golang+Android基于HttpURLConnection实现的文件上传功能示例

2019-12-12 03:32:08

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本文实例讲述了Golang+Android基于HttpURLConnection实现的文件上传功能。分享给大家供大家参考，具体如下：

这里要演示的是使用Android程序作为客户端（使用HttpURLConnection访问网络），Golang程序作为服务器端，实现文件上传。

客户端代码：

public static String uploadFile(String uploadUrl, String filePath) {    Log.v(TAG, "url:" + uploadUrl);    Log.v(TAG, "filePath:" + filePath);    String nextLine = "/r/n";    String dividerStart = "--";    String boundary = "******";    try {      URL url = new URL(uploadUrl);      HttpURLConnection connection = (HttpURLConnection) url.openConnection();      connection.setChunkedStreamingMode(1024 * 256);      connection.setDoInput(true);      connection.setDoOutput(true);      connection.setUseCaches(false);      connection.setRequestMethod("POST");      // 设置Http请求头      connection.setRequestProperty("Connection", "Keep-Alive");      connection.setRequestProperty("Charset", "UTF-8");      //必须在Content-Type 请求头中指定分界符      connection.setRequestProperty("Content-Type", "multipart/form-data;boundary=" + boundary);      //定义数据写入流，准备上传文件      DataOutputStream dos = new DataOutputStream(connection.getOutputStream());      dos.writeBytes(dividerStart + boundary + nextLine);      //设置与上传文件相关的信息      dos.writeBytes("Content-Disposition: form-data; name=/"file/"; filename=/""          + filePath.substring(filePath.lastIndexOf("/") + 1) + "/"" + nextLine);      dos.writeBytes(nextLine);      FileInputStream fis = new FileInputStream(filePath);      byte[] buffer = new byte[1024 * 32];      int count;      // 读取文件内容，并写入OutputStream对象      while ((count = fis.read(buffer)) != -1) {        dos.write(buffer, 0, count);      }      fis.close();      dos.writeBytes(nextLine);      dos.writeBytes(dividerStart + boundary + dividerStart + nextLine);      dos.flush();      // 开始读取从服务器传过来的信息      InputStream is = connection.getInputStream();      BufferedReader br = new BufferedReader(new InputStreamReader(is, "UTF-8"));      String result = br.readLine();      dos.close();      is.close();      connection.disconnect();      return result;    } catch (IOException e) {      e.printStackTrace();    }    return null;}

服务器端代码：

复制代码代码如下:

package webserver
//接收客户端通过http上传的文件
//Date: 2015-3-25 16:18:33
import (
    "fmt"
    "io/ioutil"
    "log"
    "net/http"
    "os"
)
func UpLoadBase() {
    fmt.Println("This is uploadbase")
    http.HandleFunc("/httpUploadFile", handleUploadFile)
    http.ListenAndServe(":8086", nil)
    if err != nil {
        fmt.Println("ListenAndServe error: ", err.Error())
    }
}
func handleUploadFile(w http.ResponseWriter, r *http.Request) {
    fmt.Println("client:", r.RemoteAddr)
    file, fileHeader, err := r.FormFile("file")
    if err != nil {
        log.Fatal("FormFile:", err.Error())
        return
    }
    defer func() {
        if err := file.Close(); err != nil {
            log.Fatal("Close:", err.Error())
            return
        }
    }()
    //文件名
    fileName := fileHeader.Filename
    if fileName == "" {
        log.Fatal("Param filename cannot be null.")
        return
    }
    //文件内容
    bytes, err := ioutil.ReadAll(file)
    //写到服务端本地文件中
    outputFilePath := "/home/admin/桌面/" + fileName
    err = ioutil.WriteFile(outputFilePath, bytes, os.ModePerm)
    if err != nil {
        log.Fatal("WriteFileError:", err.Error())
        return
    }
    w.Write(([]byte)("上传文件成功！"))
}