java - 无法将文件从 Android 上传到 PHP 服务器

Question

我正在制作一个应用程序，它将一个文件从SD 卡上传 到PHP 服务器。但是，当我尝试执行此操作时，出现错误。

我的安卓代码如下:

package de.fileupload;

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpEntityEnclosingRequestBase;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.methods.HttpUriRequest;
import org.apache.http.entity.mime.MultipartEntity;
import org.apache.http.entity.mime.content.FileBody;
import org.apache.http.entity.mime.content.StringBody;
import org.apache.http.impl.client.DefaultHttpClient;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Date;
import android.os.Bundle;

@SuppressWarnings("unused")
public class FileUpload extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    final TextView tmp = (TextView) findViewById(R.id.textView1);
    tmp.setText("Hi! Click the button!");

    Button b = (Button) findViewById(R.id.button1);
    b.setOnClickListener(new OnClickListener() {
    public void onClick(View v) {
    File f = new File("mnt/sdcard/SMSBackup.txt");
    try {
    f.createNewFile();
    Date d = new Date();
    PrintWriter writer = new PrintWriter(f);
    writer.println(d.toString());
    writer.close();
    HttpClient client = new DefaultHttpClient();
    httpPostFileUpload(client, "mnt/sdcard/SMSBackup.txt", "http://10.0.2.2:8080/admin/admin/upload1.php", "uploadedfile");
    } catch (Exception e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
    }
    }
    });
    }
    public void httpPostFileUpload(
    HttpClient client,
    String filePath,
    String uploadUri,
    String inputNameAttr) throws ClientProtocolException,
    IOException {
    HttpUriRequest request = new HttpPost(uploadUri);
    MultipartEntity form = new MultipartEntity();

    client.getParams().setBooleanParameter("http.protocol.expect-continue", false);
    form.addPart(inputNameAttr, new FileBody(new File(filePath)));
    ((HttpEntityEnclosingRequestBase) request).setEntity(form);
    try {
    client.execute(request);
    } catch (ClientProtocolException e) {
    throw e;
    } catch (IOException ee) {
    throw ee;
    }
    }
    }

我的 PHP 文件如下:

上传1.php

<meta name="generator" content="Namo WebEditor(Trial)">
<form enctype="multipart/form-data" action="upload.php" method="POST"> 
<input type="hidden" name="MAX_FILE_SIZE" value="100000" /> 
 Choose a file to upload: <input name="uploadedfile" type="file" /><br /><input 
 type="submit" value="Upload File" /> 
 </form> 
 <?php 
 $to_file = "tmp/" . basename($_FILES['uploadedfile']['name']); 
 $from_file = $_FILES['uploadedfile']['tmp_name']; 
 if (move_uploaded_file($from_file, $to_file)) { 
  echo "Successful upload"; 
 ?> 
 <a href="<?php echo $to_file;?>"><?php echo $to_file;?></a> 
 <?php 
 } else { 
 echo "Unsuccessful upload"; 
 } 
 ?> 

upload.php 是:

<?php
// Where the file is going to be placed 
$target_path = "localhost/admin/admin/uploads/";

/* Add the original filename to our target path.  
 Result is "uploads/filename.extension" */
 $target_path = $target_path . basename( $_FILES['uploadedfile']['name']); 

 if(move_uploaded_file($_FILES['uploadedfile']['tmp_name'], $target_path)) {
 echo "The file ".  basename( $_FILES['uploadedfile']['name']). 
 " has been uploaded";
 chmod ("uploads/".basename( $_FILES['uploadedfile']['name']), 0644);
 } else{
 echo "There was an error uploading the file, please try again!";
 echo "filename: " .  basename( $_FILES['uploadedfile']['name']);
 echo "target_path: " .$target_path;
 }
 ?>

谁能告诉我哪里错了？它总是显示文件上传失败。当我的服务器正在运行时。

Answer 1

尝试改用move_uploaded_file()，函数copy()。它们使用相同的输入参数，如下所示:

if(copy($_FILES['uploadedfile']['tmp_name'], $target_path)) { ...

很可能PHP进程没有权限在上传成功后将上传的文件移动到不同的文件夹，因为移动本质上包含复制和删除操作。

还有一件事——尽量不要将上传文件的权限更改为 0644，因为这也可以限制在 PHP 进程中，即当你在 Linux 上处理文件系统操作时(我假设你使用 Linux 机器作为你的服务器)工作进程(在你的情况下是 PHP 和 apache)设置了特定的权限，也许他们没有能力删除/移动工作文件夹之外的文件。您还应该将上传文件夹权限更改为 755 或 777。