Android向PHP服务端上传文件报FileNotFoundException错误

Question

服务端：（auth变量为用户登录状态验证，这部分确认没错。）

if( $auth==1){
    $target_path = ROOT.basename($_FILES['uploadedfile']['name']);
    echo $target_path;
    if(move_uploaded_file($_FILES['uploadedfile']['tmp_name'], $target_path)) { 
       echo "The file ".  basename( $_FILES['uploaded_file']['name']). " has been uploaded"; 
    } else{ 
       echo "There was an error uploading the file, please try again!" . $_FILES['uploadedfile']['error'];
    } 
}else{
    echo 'error_login';
}

客户端：

private String uploadFile = Environment.getExternalStorageDirectory()+ "/" + packageName + "/" + "images" + "/" + "image.jpg";
private String srcPath = Environment.getExternalStorageDirectory()+ "/" + packageName + "/" + "images" + "/" + "image.jpg";
private String actionUrl = getTargetUrl(); //PHP连接

 private void uploadFile(final String uploadUrl) {
        Thread thread = new Thread() {
            @Override
            public void run() {
                //DEBUG
                File file = new File(uploadFile);
                if(file.exists()){
                    Log.i("DEBUG","要上传的文件存在");
                }
                String end = "\r\n";
                String twoHyphens = "--";
                String boundary = "******";
                try {
                    URL url = new URL(uploadUrl);
                    HttpURLConnection httpURLConnection = (HttpURLConnection)url.openConnection();
                    // 设置每次传输的流大小，可以有效防止手机因为内存不足崩溃
                    // 此方法用于在预先不知道内容长度时启用没有进行内部缓冲的 HTTP 请求正文的流。
                    httpURLConnection.setChunkedStreamingMode(128 * 1024);// 128K
                    // 允许输入输出流
                    httpURLConnection.setDoInput(true);
                    httpURLConnection.setDoOutput(true);
                    httpURLConnection.setUseCaches(false);
                    // 使用POST方法
                    httpURLConnection.setRequestMethod("POST");
                    httpURLConnection.setRequestProperty("Connection", "Keep-Alive");
                    httpURLConnection.setRequestProperty("Charset", "UTF-8");
                    httpURLConnection.setRequestProperty("Content-Type",
                            "multipart/form-data;boundary=" + boundary);
                    DataOutputStream dos = new DataOutputStream(httpURLConnection.getOutputStream());
                    dos.writeBytes(twoHyphens + boundary + end);
                    dos.writeBytes("Content-Disposition: form-data; name=\"uploadedfile\"; filename=\""
                            + srcPath.substring(srcPath.lastIndexOf("/") + 1)
                            + "\""
                            + end);
                    dos.writeBytes(end);
                    FileInputStream fis = new FileInputStream(srcPath);
                    byte[] buffer = new byte[8192]; // 8k
                    int count = 0;
                    // 读取文件
                    while ((count = fis.read(buffer)) != -1) {
                        dos.write(buffer, 0, count);
                    }
                    fis.close();
                    dos.writeBytes(end);
                    dos.writeBytes(twoHyphens + boundary + twoHyphens + end);
                    dos.flush();
                    InputStream is = httpURLConnection.getInputStream();
                    InputStreamReader isr = new InputStreamReader(is, "utf-8");
                    BufferedReader br = new BufferedReader(isr);
                    String result = br.readLine();
                    dos.close();
                    is.close();
                } catch (Exception e) {
                    e.printStackTrace();
                    setTitle(e.getMessage());
                }
            }
        };
        thread.start();
    }

运行后返回错误：（包含服务端接收页面的链接）
报错后运行也中止了，没有收到服务端打印的任何信息。
java.io.FileNotFoundException: http://.../upload.php
at com.android.okhttp.internal.http.HttpURLConnectionImpl.getInputStream(HttpURLConnectionImpl.java:206)
Studio指示错误的行是：
InputStream is = httpURLConnection.getInputStream();

起初以为是本地文件不存在，结果用文件管理器确认、包括代码中检查后也打出了“文件存在“，可以确定的是客户端文件路径没错。后来以为URL链接有问题，用电脑浏览器可以正常打开，可以打印内容，所以服务端链接也应没错。

百思不得其解，搜索很久也没找到解决方案，特来求助。求老司机带一带。

Answer 1

安卓端的代码应该没问题，建议查一下服务器端的接收。