使用JSonParser将图像上传到PHP服务器

Question

我想用我的JSONParser类上传图像。 这里是类：

public class JSONParser { 

    String charset = "UTF-8"; 
    HttpURLConnection conn; 
    DataOutputStream wr; 
    StringBuilder result = new StringBuilder(); 
    URL urlObj; 
    JSONObject jObj = null; 
    StringBuilder sbParams; 
    String paramsString; 

    public JSONObject makeHttpRequest(final Context context,String url, String method, 
             HashMap<String, String> params) { 

     sbParams = new StringBuilder(); 
     int i = 0; 
     for (String key : params.keySet()) { 
      try { 
       if (i != 0){ 
        sbParams.append("&"); 
       } 
       sbParams.append(key).append("=") 
         .append(URLEncoder.encode(params.get(key), charset)); 

      } catch (UnsupportedEncodingException e) { 
       e.printStackTrace(); 
      } 
      i++; 
     } 

     if (method.equals("POST")) { 
      // request method is POST 
      try { 
       urlObj = new URL(url); 

       conn = (HttpURLConnection) urlObj.openConnection(); 

       conn.setDoOutput(true); 

       conn.setRequestMethod("POST"); 

       conn.setRequestProperty("Accept-Charset", charset); 


       conn.setReadTimeout(10*1000);//orijinal 10000 

       conn.setConnectTimeout(15*1000);//orijinal 15000 

       conn.connect(); 

       paramsString = sbParams.toString(); 

       wr = new DataOutputStream(conn.getOutputStream()); 
       wr.writeBytes(paramsString); 
       wr.flush(); 
       wr.close(); 

      } catch (IOException e) { 
       e.printStackTrace(); 
      } 
     } 
     else if(method.equals("GET")){ 
      // request method is GET 

      if (sbParams.length() != 0) { 
       url += "?" + sbParams.toString(); 
      } 

      try { 
       urlObj = new URL(url); 

       conn = (HttpURLConnection) urlObj.openConnection(); 

       conn.setDoOutput(false); 

       conn.setRequestMethod("GET"); 

       conn.setRequestProperty("Accept-Charset", charset); 

       conn.setConnectTimeout(15000); 

       conn.connect(); 

      } catch (IOException e) { 
       MyMethods.makeToastInAsync(context,context.getResources().getString(R.string.connProblem),Toast.LENGTH_LONG); 
       e.printStackTrace(); 
      } 

     } 

     try { 
      //Receive the response from the server 
      InputStream in = new BufferedInputStream(conn.getInputStream()); 
      BufferedReader reader = new BufferedReader(new InputStreamReader(in)); 

      String line; 
      while ((line = reader.readLine()) != null) { 
       result.append(line); 
      } 

      Log.d("JSON Parser", "result: " + result.toString()); 

     } catch (IOException e) { 

      MyMethods.makeToastInAsync(context,context.getResources().getString(R.string.connProblem),Toast.LENGTH_LONG); 

      e.printStackTrace(); 
     } 

     conn.disconnect(); 

     // try parse the string to a JSON object 
     try { 
      jObj = new JSONObject(result.toString()); 
     } catch (JSONException e) { 
      Log.e("JSON Parser", "Error parsing data " + e.toString()); 
     } 

     // return JSON Object 
     return jObj; 
    } 
} 

SendImage类的异步部分：

protected JSONObject doInBackground(String... args) { 

     try { 

      ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream(); 
      image.compress(Bitmap.CompressFormat.JPEG, 50, byteArrayOutputStream); 
      String encodedImage = Base64.encodeToString(byteArrayOutputStream.toByteArray(), Base64.DEFAULT); 

      Log.d("Send Image", encodedImage); 


      HashMap<String, String> dataTosend = new HashMap<>(); 
      dataTosend.put("image", encodedImage); 
      dataTosend.put("name", sharedPreferences.getString("username", "")); 

      JSONObject json = jsonParser.makeHttpRequest(SendImage.this, 
        UPLOAD_IMAGE_URL, "POST", dataTosend); 

      if (json != null) { 
       Log.d("JSON result", json.toString()); 

       return json; 
      } 


     }catch (Exception e){ 
      e.printStackTrace(); 
     } 

     return null; 
    } 

所以，你看，我首先压缩的图像和Base64编码，并返回字符串与JSONParser发。

的问题是，我可以送形象，没有那么大，但我不能发送，如果它超过6 MB（约）。我得到这个错误：在line

java.io.FileNotFoundException: http://example.com/uploadImage.php 

和错误：

InputStream in = new BufferedInputStream(conn.getInputStream()); 
(E/JSON Parser: Error parsing data org.json.JSONException: End of input at character 0 of) 

在我看来，我得到JSON异常，因为没有从服务器的答案。但我不明白为什么我得到这个错误。

java.io.FileNotFoundException: http://example.com/uploadImage.php 

是否有可能，该服务器不接受传入文件超过某些Mb？

编辑：当我将压缩比从50改为10时，我可以上传图像，我不能。所以，我确信由于图像大小而发生错误。前setReadTimeout和setConnectTimeout超过发生

此错误。

我的PHP代码：

<?php 
if (!empty($_POST)) { 


$name =$_POST["name"]; 
$image =$_POST["image"]; 

$decodedImage= base64_decode("$image"); 

$resultt=file_put_contents("images/" .$name. ".JPG",$decodedImage); 

if($resultt){ 


    $response["success"] = 1; 
     $response["message"] = "".$resultt. ""; 
     die(json_encode($response)); 

} 
    $response["success"] = 0; 
     $response["message"] = "Fail"; 
     die(json_encode($response)); 

} 



?> 

Answer 1

在服务器也许问题。

php.ini文件在您的服务器内。

PHP有几个配置选项来限制脚本消耗的资源。默认情况下，PHP设置为允许上传2MB或更小的文件。

尝试在php.ini中增加了以下值，例如：

memory_limit = 32M 
upload_max_filesize = 24M 
post_max_size = 32M