Android無法將圖像上傳到服務器。錯誤的圖像類型

Question

我有一個應用程序使用HttpCliend和MultipartEntityBuilder將圖像發送到服務器。我的問題是發送不成功。我從服務器收到消息「無效文件」。

這是我的發送方法：

public void executeMultipartPost() throws ClientProtocolException, 
     IOException { 
    String result = ""; 
    Log.d("DrawingFragment", "executeMultipartPost"); 

    httpClient.setCookieStore(signiture.getCookies()); 

    HttpPost httpPostRequest = new HttpPost(url); 

    File file = new File(signiturePath); 

    FileBody bin = new FileBody(file); 
    Log.v("FileBody", bin.getFilename()); 
    Log.d("signiturePath", signiturePath); 
    MultipartEntityBuilder multiPartEntityBuilder = MultipartEntityBuilder 
      .create(); 

    Log.i("HttpRequest Headers", "==========================================================="); 
    Header headers[] = httpPostRequest.getAllHeaders(); 
    for(Header h:headers) { 
     Log.i("", h.getName() + ": " + h.getValue() + "\n"); 
    } 
    Log.i("", "==========================================================="); 
    multiPartEntityBuilder.addTextBody("Content-Type", "image/png"); 

    multiPartEntityBuilder.addPart("file", bin); 

    httpPostRequest.setEntity(multiPartEntityBuilder.build()); 

    HttpResponse httpResponse = null; 
    httpResponse = httpClient.execute(httpPostRequest); 

    Log.i("HttpResponse Headers", "==========================================================="); 
    headers = httpResponse.getAllHeaders(); 
    for(Header h:headers) { 
     Log.i("", h.getName() + ": " + h.getValue() + "\n"); 
    } 
    Log.i("", "==========================================================="); 

    InputStream inputStream = null; 
    inputStream = httpResponse.getEntity().getContent(); 

    if (inputStream != null) { 
     result = convertInputStreamToString(inputStream); 
    } else { 
     result = "Did not work!"; 
    } 

    Log.i("UploadPhoto", result); 
} 

這是PHP服務器：

<?php 
$allowedExts = array("gif", "jpeg", "jpg", "png"); 
$temp = explode(".", $_FILES["file"]["name"]); 
$extension = end($temp); 

echo "Upload: " . $_FILES["file"]["name"] . "\n"; 
echo "Upload: " . $_FILES["file"]["type"] . "\n"; 

if ((($_FILES["file"]["type"] == "image/gif") 
|| ($_FILES["file"]["type"] == "image/jpeg") 
|| ($_FILES["file"]["type"] == "image/jpg") 
|| ($_FILES["file"]["type"] == "image/pjpeg") 
|| ($_FILES["file"]["type"] == "image/x-png") 
|| ($_FILES["file"]["type"] == "image/png")) 
&& in_array($extension, $allowedExts)) { 
    echo "Passed First If"; 
    if ($_FILES["file"]["error"] > 0) { 
    echo "Return Code: " . $_FILES["file"]["error"] . "<br>"; 
    } else { 
    echo "Upload: " . $_FILES["file"]["name"] . "<br>"; 
    echo "Type: " . $_FILES["file"]["type"] . "<br>"; 
    echo "Size: " . ($_FILES["file"]["size"]/1024) . " kB<br>"; 
    echo "Temp file: " . $_FILES["file"]["tmp_name"] . "<br>"; 
    if (file_exists("upload/" . $_FILES["file"]["name"])) { 
     echo $_FILES["file"]["name"] . " already exists. "; 
    } else { 
     move_uploaded_file($_FILES["file"]["tmp_name"], 
     "./" . $_FILES["file"]["name"]); 
     echo "Stored in: " . "upload/" . $_FILES["file"]["name"]; 
    } 
    } 
} else { 
    echo "Invalid file"; 
} 
?> 

這是我在logcat中：

07-14 22:57:05.720: I/HttpRequest Headers(14081): =========================================================== 
07-14 22:57:05.720: I/(14081): =========================================================== 
07-14 22:57:05.960: I/HttpResponse Headers(14081): =========================================================== 
07-14 22:57:05.960: I/(14081): Date: Mon, 14 Jul 2014 20:59:38 GMT 
07-14 22:57:05.960: I/(14081): Server: Microsoft-IIS/6.0 
07-14 22:57:05.960: I/(14081): X-Powered-By: ASP.NET 
07-14 22:57:05.960: I/(14081): X-Powered-By: PHP/5.3.5 
07-14 22:57:05.960: I/(14081): Content-type: text/html 
07-14 22:57:05.960: I/(14081): Content-Length: 63 
07-14 22:57:05.960: I/(14081): =========================================================== 
07-14 22:57:05.960: I/UploadPhoto(14081): Upload: image.pngUpload: application/octet-streamInvalid file 

正如你可以看到get到服務器的文件，但沒有通過任何if條件。我試過httpPostRequest.setHeader("Content-type", "image/png;");，但沒有奏效。你能告訴我什麼是問題，以及如何解決它？謝謝。

Answer 1

我想通了。我上傳圖像作爲一個二進制正文，並在那裏我設置類型和名稱：

multiPartEntityBuilder.addBinaryBody(imageName, byteArray, ContentType.create("image/png"), "image.png"); 

Answer 2

使用

FileBody bin = new FileBody(file, "image/png"); 

你想設置的內容類型的文件，而不是請求。 查看org.apache.http documentation for more details