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我有一个实现多文件上传的类。 代码工作在每一个Java客户端，我试了一下，除了Android和它在我的Android应用程序的唯一的HTTP请求代码，没有发挥好与我的后台服务。
连接responseCode是“-1”，所以一些非常讨厌的是怎么回事。 没有条目在Apache的访问或错误日志显示出来，它好像请求永远不会使其关闭的android平台。 该代码获取权通过连接写道，但挂在连接上阅读，超时，然后返回。 行为是一样的真正的电话和仿真器。
有谁知道一个需要留意张贴在Android的多部分文件时，对于任何陷阱吗？
我包括下文（做了细微卫生MODS）类，所以你可以看到我到
import java.io.ByteArrayOutputStream;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
public class GeoPictureUploader
{
static String serviceDomain = "http://staging.abaqus.net";
static String postUrl = serviceDomain + "/geo/upl/wupload/pictures";
static String CRLF = "\r\n";
static String twoHyphens = "--";
static String boundary = "*****mgd*****";
private String pictureFileName = null;
private String name = null;
private String password = null;
private DataOutputStream dataStream = null;
enum ReturnCode { noPicture, unknown, http201, http400, http401, http403, http404, http500};
public GeoPictureUploader(String name, String password)
{
this.name = name;
this.password = password;
}
public static void setServiceDomain(String domainName)
{
serviceDomain = domainName;
}
public static String getServiceDomain()
{
return serviceDomain;
}
public ReturnCode uploadPicture(String pictureFileName)
{
this.pictureFileName = pictureFileName;
File uploadFile = new File(pictureFileName);
if (uploadFile.exists())
try
{
FileInputStream fileInputStream = new FileInputStream(uploadFile);
URL connectURL = new URL(postUrl);
HttpURLConnection conn = (HttpURLConnection)connectURL.openConnection();
conn.setDoInput(true);
conn.setDoOutput(true);
conn.setUseCaches(false);
conn.setRequestMethod("POST");
conn.setRequestProperty("User-Agent", "myGeodiary-V1");
conn.setRequestProperty("Connection","Keep-Alive");
conn.setRequestProperty("Content-Type","multipart/form-data;boundary="+boundary);
conn.connect();
dataStream = new DataOutputStream(conn.getOutputStream());
writeFormField("login", name);
writeFormField("password", password);
writeFileField("photo1", pictureFileName, "image/jpg", fileInputStream);
// final closing boundary line
dataStream.writeBytes(twoHyphens + boundary + twoHyphens + CRLF);
fileInputStream.close();
dataStream.flush();
dataStream.close();
dataStream = null;
String response = getResponse(conn);
int responseCode = conn.getResponseCode();
if (response.contains("uploaded successfully"))
return ReturnCode.http201;
else
// for now assume bad name/password
return ReturnCode.http401;
}
catch (MalformedURLException mue) {
// Log.e(Tag, "error: " + mue.getMessage(), mue);
System.out.println("GeoPictureUploader.uploadPicture: Malformed URL: " + mue.getMessage());
return ReturnCode.http400;
}
catch (IOException ioe) {
// Log.e(Tag, "error: " + ioe.getMessage(), ioe);
System.out.println("GeoPictureUploader.uploadPicture: IOE: " + ioe.getMessage());
return ReturnCode.http500;
}
catch (Exception e) {
// Log.e(Tag, "error: " + ioe.getMessage(), ioe);
System.out.println("GeoPictureUploader.uploadPicture: unknown: " + e.getMessage());
return ReturnCode.unknown;
}
else
{
return ReturnCode.noPicture;
}
}
/**
* @param conn
* @return
*/
private String getResponse(HttpURLConnection conn)
{
try
{
DataInputStream dis = new DataInputStream(conn.getInputStream());
byte [] data = new byte[1024];
int len = dis.read(data, 0, 1024);
dis.close();
int responseCode = conn.getResponseCode();
if (len > 0)
return new String(data, 0, len);
else
return "";
}
catch(Exception e)
{
System.out.println("GeoPictureUploader: biffed it getting HTTPResponse");
//Log.e(TAG, "GeoPictureUploader: biffed it getting HTTPResponse");
return "";
}
}
/**
* this mode of reading response no good either
*/
private String getResponseOrig(HttpURLConnection conn)
{
InputStream is = null;
try
{
is = conn.getInputStream();
// scoop up the reply from the server
int ch;
StringBuffer sb = new StringBuffer();
while( ( ch = is.read() ) != -1 ) {
sb.append( (char)ch );
}
return sb.toString(); // TODO Auto-generated method stub
}
catch(Exception e)
{
System.out.println("GeoPictureUploader: biffed it getting HTTPResponse");
//Log.e(TAG, "GeoPictureUploader: biffed it getting HTTPResponse");
}
finally
{
try {
if (is != null)
is.close();
} catch (Exception e) {}
}
return "";
}
/**
* write one form field to dataSream
* @param fieldName
* @param fieldValue
*/
private void writeFormField(String fieldName, String fieldValue)
{
try
{
dataStream.writeBytes(twoHyphens + boundary + CRLF);
dataStream.writeBytes("Content-Disposition: form-data; name=\"" + fieldName + "\"" + CRLF);
dataStream.writeBytes(CRLF);
dataStream.writeBytes(fieldValue);
dataStream.writeBytes(CRLF);
}
catch(Exception e)
{
System.out.println("GeoPictureUploader.writeFormField: got: " + e.getMessage());
//Log.e(TAG, "GeoPictureUploader.writeFormField: got: " + e.getMessage());
}
}
/**
* write one file field to dataSream
* @param fieldName - name of file field
* @param fieldValue - file name
* @param type - mime type
* @param fileInputStream - stream of bytes that get sent up
*/
private void writeFileField(
String fieldName,
String fieldValue,
String type,
FileInputStream fis)
{
try
{
// opening boundary line
dataStream.writeBytes(twoHyphens + boundary + CRLF);
dataStream.writeBytes("Content-Disposition: form-data; name=\""
+ fieldName
+ "\";filename=\""
+ fieldValue
+ "\""
+ CRLF);
dataStream.writeBytes("Content-Type: " + type + CRLF);
dataStream.writeBytes(CRLF);
// create a buffer of maximum size
int bytesAvailable = fis.available();
int maxBufferSize = 1024;
int bufferSize = Math.min(bytesAvailable, maxBufferSize);
byte[] buffer = new byte[bufferSize];
// read file and write it into form...
int bytesRead = fis.read(buffer, 0, bufferSize);
while (bytesRead > 0)
{
dataStream.write(buffer, 0, bufferSize);
bytesAvailable = fis.available();
bufferSize = Math.min(bytesAvailable, maxBufferSize);
bytesRead = fis.read(buffer, 0, bufferSize);
}
// closing CRLF
dataStream.writeBytes(CRLF);
}
catch(Exception e)
{
System.out.println("GeoPictureUploader.writeFormField: got: " + e.getMessage());
//Log.e(TAG, "GeoPictureUploader.writeFormField: got: " + e.getMessage());
}
}
/**
* @param args
*/
public static void main(String[] args)
{
if (args.length >= 0)
{
GeoPictureUploader gpu = new GeoPictureUploader("john", "notmyrealpassword");
String picName = args[0];
ReturnCode rc = gpu.uploadPicture(picName);
System.out.printf("done");
}
}
}
