Golang+Android基于HttpURLConnection實現的文件上傳功能示例

2019-12-12 03:32:08

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來源：轉載

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本文實例講述了Golang+Android基于HttpURLConnection實現的文件上傳功能。分享給大家供大家參考，具體如下：

這里要演示的是使用Android程序作為客戶端（使用HttpURLConnection訪問網絡），Golang程序作為服務器端，實現文件上傳。

客戶端代碼：

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");      // 設置Http請求頭      connection.setRequestProperty("Connection", "Keep-Alive");      connection.setRequestProperty("Charset", "UTF-8");      //必須在Content-Type 請求頭中指定分界符      connection.setRequestProperty("Content-Type", "multipart/form-data;boundary=" + boundary);      //定義數據寫入流，準備上傳文件      DataOutputStream dos = new DataOutputStream(connection.getOutputStream());      dos.writeBytes(dividerStart + boundary + nextLine);      //設置與上傳文件相關的信息      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;      // 讀取文件內容，并寫入OutputStream對象      while ((count = fis.read(buffer)) != -1) {        dos.write(buffer, 0, count);      }      fis.close();      dos.writeBytes(nextLine);      dos.writeBytes(dividerStart + boundary + dividerStart + nextLine);      dos.flush();      // 開始讀取從服務器傳過來的信息      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;}

服務器端代碼：

復制代碼代碼如下:

package webserver
//接收客戶端通過http上傳的文件
//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
    }
    //文件內容
    bytes, err := ioutil.ReadAll(file)
    //寫到服務端本地文件中
    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)("上傳文件成功！"))
}