我有这个问题，我想通过多部分表单上传服务器上的图像，但当我尝试从Android上传它但从网上工作正常时，它一直给我无效的图像。 这是html表单，工作正常。
http://letitripple.org/htmlForm.html
这是此html表单创建的请求。 （我从chrome开发人员工具获得）
------ WebKitFormBoundaryPug6xAUAlaUPbR86 内容处理：表格数据; NAME = “WP-用户化身”;文件名= “Desert.jpg” 内容类型：image / jpeg
------ WebKitFormBoundaryPug6xAUAlaUPbR86 内容处理：表格数据;名称= “LOGIN_ID”
51 ------ WebKitFormBoundaryPug6xAUAlaUPbR86 内容处理：表格数据;名称= “饼干”
ali.asim@gmail.com|1473394633|vcN3CTbKi6pkAjPMKH1D9MHucPLKhw3wyeS7ViSTgGb|f5cbd913f6c3d6940066a660bac5908adb016682ce34f48e8200773eb4503c1e ------ WebKitFormBoundaryPug6xAUAlaUPbR86 内容处理：表格数据; NAME = “提交”
提交 ------ WebKitFormBoundaryPug6xAUAlaUPbR86 -
这是我的Android代码无效。
public AppResponse uploadImageFile(String csURL, String csFilePath)
{
AppResponse appResponse = null;
HttpURLConnection conn = null;
DataOutputStream dos = null;
ByteArrayOutputStream output = null;
InputStream inStream = null;
String Url = csURL;
String existingFileName = csFilePath;
String lineEnd = "\r\n";
String twoHyphens = "--";
String boundary = "WebKitFormBoundaryleA9RIQsQBxW8Cgl";
int bytesRead, bytesAvailable, bufferSize;
byte[] buffer;
// String reponse_data = null;
int maxBufferSize = 1 * 1024 * 1024;
// String urlString = "YOUR PHP LINK FOR UPLOADING IMAGE";
try {
//------------------ CLIENT REQUEST
// FileInputStream fileInputStream = new FileInputStream(new File(existingFileName) );
// open a URL connection to the Servlet
URL url = new URL(Url);
// Open a HTTP connection to the URL
conn = (HttpURLConnection) url.openConnection();
// Allow Inputs
conn.setDoInput(true);
// Allow Outputs
conn.setDoOutput(true);
// Don't use a cached copy.
conn.setUseCaches(false);
FileInputStream fileInputStream = new FileInputStream(new File(existingFileName));//You can get an inputStream using any IO API
byte[] bytes;
byte[] buffers = new byte[605244];
int bytesReads;
output = new ByteArrayOutputStream();
// Use a post method.
conn.setRequestMethod("POST");
conn.setRequestProperty("Connection", "Keep-Alive");
conn.setRequestProperty("Content-Type", "multipart/form-data; boundary=" + twoHyphens + twoHyphens + boundary);
//conn.setRequestProperty("attach1", existingFileName);
dos = new DataOutputStream(conn.getOutputStream());
dos.writeBytes(twoHyphens + twoHyphens + twoHyphens + boundary + "\r\n");
dos.writeBytes("Content-Disposition: form-data; name=\"attach1\"; filename=\"profile.jpg\"\n Content-Type: image/jpg\r\n\r\n\r\n"); // uploaded_file_name is the Name of the File to be uploaded
// create a buffer of maximum size
bytesAvailable = fileInputStream.available();
bufferSize = Math.min(bytesAvailable, maxBufferSize);
buffer = new byte[bufferSize];
// read file and write it into form...
bytesRead = fileInputStream.read(buffer, 0, bufferSize);
while (bytesRead > 0) {
dos.write(buffer, 0, bufferSize);
bytesAvailable = fileInputStream.available();
bufferSize = Math.min(bytesAvailable, maxBufferSize);
bytesRead = fileInputStream.read(buffer, 0, bufferSize);
Log.e("Value", "Writing");
}
// send multipart form data necesssary after file data...
dos.writeBytes(lineEnd);
dos.writeBytes(twoHyphens + twoHyphens + twoHyphens + boundary + twoHyphens);
//String strInput = dos.toString();
int responseCode = conn.getResponseCode();
String serverResponseMessage = conn.getResponseMessage();
fileInputStream.close();
dos.flush();
dos.close();
int nResponseCode = conn.getResponseCode();
inStream = new DataInputStream(conn.getInputStream());
BufferedReader in = new BufferedReader(new InputStreamReader(inStream));
String line = "";
StringBuilder csResult = new StringBuilder("");
while ((line = in.readLine()) != null) {
Log.e("Debug", "Server Response " + csResult);
csResult.append(line);
}
appResponse = new AppResponse(nResponseCode, csResult.toString());
}
catch (IOException ioe) {
Log.e("Debug", "error: " + ioe.getMessage(), ioe);
}
return appResponse;
}
答案 0 :(得分：0)
我们使用以下代码构建名为public function testCoursePurchasedMessageConstant()
{
$pm = new PurchaseManager();
$this->assertTrue(defined(get_class($pm) . '::COURSE_PURCHASED_MESSAGE'));
}
的实用程序类：
MultipartUtility此实用程序类使用java.net.HttpURLConnection类并遵循RFC 1867（基于表单的HTML文件上载）来生成具有multipart / form-data内容类型的HTTP POST请求，以便将文件上载到给定的URL 。它有一个构造函数和三个方法：
由于MultipartUtility类抽象了所有详细的实现，因此使用示例非常简单，如以下程序所示：
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLConnection;
import java.util.ArrayList;
import java.util.List;
/**
* This utility class provides an abstraction layer for sending multipart HTTP
* POST requests to a web server.
* @author www.codejava.net
*
*/
public class MultipartUtility {
private final String boundary;
private static final String LINE_FEED = "\r\n";
private HttpURLConnection httpConn;
private String charset;
private OutputStream outputStream;
private PrintWriter writer;
/**
* This constructor initializes a new HTTP POST request with content type
* is set to multipart/form-data
* @param requestURL
* @param charset
* @throws IOException
*/
public MultipartUtility(String requestURL, String charset)
throws IOException {
this.charset = charset;
// creates a unique boundary based on time stamp
boundary = "===" + System.currentTimeMillis() + "===";
URL url = new URL(requestURL);
httpConn = (HttpURLConnection) url.openConnection();
httpConn.setUseCaches(false);
httpConn.setDoOutput(true); // indicates POST method
httpConn.setDoInput(true);
httpConn.setRequestProperty("Content-Type",
"multipart/form-data; boundary=" + boundary);
httpConn.setRequestProperty("User-Agent", "CodeJava Agent");
httpConn.setRequestProperty("Test", "Bonjour");
outputStream = httpConn.getOutputStream();
writer = new PrintWriter(new OutputStreamWriter(outputStream, charset),
true);
}
/**
* Adds a form field to the request
* @param name field name
* @param value field value
*/
public void addFormField(String name, String value) {
writer.append("--" + boundary).append(LINE_FEED);
writer.append("Content-Disposition: form-data; name=\"" + name + "\"")
.append(LINE_FEED);
writer.append("Content-Type: text/plain; charset=" + charset).append(
LINE_FEED);
writer.append(LINE_FEED);
writer.append(value).append(LINE_FEED);
writer.flush();
}
/**
* Adds a upload file section to the request
* @param fieldName name attribute in <input type="file" name="..." />
* @param uploadFile a File to be uploaded
* @throws IOException
*/
public void addFilePart(String fieldName, File uploadFile)
throws IOException {
String fileName = uploadFile.getName();
writer.append("--" + boundary).append(LINE_FEED);
writer.append(
"Content-Disposition: form-data; name=\"" + fieldName
+ "\"; filename=\"" + fileName + "\"")
.append(LINE_FEED);
writer.append(
"Content-Type: "
+ URLConnection.guessContentTypeFromName(fileName))
.append(LINE_FEED);
writer.append("Content-Transfer-Encoding: binary").append(LINE_FEED);
writer.append(LINE_FEED);
writer.flush();
FileInputStream inputStream = new FileInputStream(uploadFile);
byte[] buffer = new byte[4096];
int bytesRead = -1;
while ((bytesRead = inputStream.read(buffer)) != -1) {
outputStream.write(buffer, 0, bytesRead);
}
outputStream.flush();
inputStream.close();
writer.append(LINE_FEED);
writer.flush();
}
/**
* Adds a header field to the request.
* @param name - name of the header field
* @param value - value of the header field
*/
public void addHeaderField(String name, String value) {
writer.append(name + ": " + value).append(LINE_FEED);
writer.flush();
}
/**
* Completes the request and receives response from the server.
* @return a list of Strings as response in case the server returned
* status OK, otherwise an exception is thrown.
* @throws IOException
*/
public List<String> finish() throws IOException {
List<String> response = new ArrayList<String>();
writer.append(LINE_FEED).flush();
writer.append("--" + boundary + "--").append(LINE_FEED);
writer.close();
// checks server's status code first
int status = httpConn.getResponseCode();
if (status == HttpURLConnection.HTTP_OK) {
BufferedReader reader = new BufferedReader(new InputStreamReader(
httpConn.getInputStream()));
String line = null;
while ((line = reader.readLine()) != null) {
response.add(line);
}
reader.close();
httpConn.disconnect();
} else {
throw new IOException("Server returned non-OK status: " + status);
}
return response;
}
}