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

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：

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！"))
}

希望本文所述对大家Android程序设计有所帮助。