我正在制作一个 HttpRequest 来上传 3 张图片和一些参数。我已经给出了下面的代码。当我向 localhost 发出请求时一切正常，但是当我向外部服务器发出请求时，服务器返回CODE 400
这是我的 httprequest 代码
public class ExpenseUpload {
private int serverResponseCode;
SessionManager sessionManager;
public String uploadTDdetails(Context context, String edit_expense, String strtripid, String amt1,
String amt2, String amt3, String exp1, String exp2, String exp3, String imagePath, String
imagePath1, String imagePath2) {
sessionManager = new SessionManager();
HttpURLConnection conn = null;
DataOutputStream dos;
String lineEnd = "\r\n";
String twoHyphens = "--";
String boundary = "*****";
int bytesRead, bytesAvailable, bufferSize;
byte[] buffer;
int maxBufferSize = 1 * 1024 * 1024;
File expenseFile = null, expenseFile1 = null, expenseFile2 = null;
if (!imagePath.isEmpty()) {
expenseFile = new File(imagePath);
}
if (!imagePath1.isEmpty()) {
expenseFile1 = new File(imagePath1);
}
if (!imagePath2.isEmpty()) {
expenseFile2 = new File(imagePath2);
}
try {
FileInputStream expenseInputStream = null, expenseInputStream1 = null, expenseInputStream2 =
null;
if (expenseFile != null) {
expenseInputStream = new FileInputStream(expenseFile);
}
if (expenseFile1 != null) {
expenseInputStream1 = new FileInputStream(expenseFile1);
}
if (expenseFile2 != null) {
expenseInputStream2 = new FileInputStream(expenseFile2);
}
URL url;
url = new URL(BASE_URL + com.istrides.allenstrans.Retrofit.URL.editexpense);
Log.i("senorita", url.toString());
conn = (HttpURLConnection) url.openConnection();
conn.setDoInput(true);
conn.setDoOutput(true);
conn.setUseCaches(false);
conn.setRequestMethod("POST");
conn.setRequestProperty("Connection", "Keep-Alive");
conn.setRequestProperty("ENCTYPE", "multipart/form-data");
conn.setRequestProperty("authorization", "Bearer" +
sessionManager.getSharedPreferencesValues(context, "Authkey"));
Log.d("in2in", " " + sessionManager.getSharedPreferencesValues(context, "Authkey"));
conn.setRequestProperty("Content-Type", "multipart/form-data;boundary=" + boundary);
conn.setRequestProperty("filename", "expenses");
dos = new DataOutputStream(conn.getOutputStream());
// add parameters
dos.writeBytes(twoHyphens + boundary + lineEnd);
dos.writeBytes("Content-Disposition: form-data; name=\"api_method\"" + lineEnd);
dos.writeBytes(lineEnd);
// assign value
dos.writeBytes(edit_expense);
dos.writeBytes(lineEnd);
dos.writeBytes(twoHyphens + boundary + lineEnd);
// add parameters
dos.writeBytes(twoHyphens + boundary + lineEnd);
dos.writeBytes("Content-Disposition: form-data; name=\"trip_id\"" + lineEnd);
dos.writeBytes(lineEnd);
// assign value
dos.writeBytes(strtripid);
dos.writeBytes(lineEnd);
dos.writeBytes(twoHyphens + boundary + lineEnd);
// add parameters
dos.writeBytes(twoHyphens + boundary + lineEnd);
dos.writeBytes("Content-Disposition: form-data; name=\"expenses_1_amt\"" + lineEnd);
dos.writeBytes(lineEnd);
// assign value
dos.writeBytes(amt1);
dos.writeBytes(lineEnd);
dos.writeBytes(twoHyphens + boundary + lineEnd);
// add parameters
dos.writeBytes(twoHyphens + boundary + lineEnd);
dos.writeBytes("Content-Disposition: form-data; name=\"expenses_2_amt\"" + lineEnd);
dos.writeBytes(lineEnd);
// assign value
dos.writeBytes(amt2);
dos.writeBytes(lineEnd);
dos.writeBytes(twoHyphens + boundary + lineEnd);
// add parameters
dos.writeBytes(twoHyphens + boundary + lineEnd);
dos.writeBytes("Content-Disposition: form-data; name=\"expenses_3_amt\"" + lineEnd);
dos.writeBytes(lineEnd);
// assign value
dos.writeBytes(amt3);
dos.writeBytes(lineEnd);
dos.writeBytes(twoHyphens + boundary + lineEnd);
// add parameters
dos.writeBytes(twoHyphens + boundary + lineEnd);
dos.writeBytes("Content-Disposition: form-data; name=\"expenses_1\"" + lineEnd);
dos.writeBytes(lineEnd);
// assign value
dos.writeBytes(exp1);
dos.writeBytes(lineEnd);
dos.writeBytes(twoHyphens + boundary + lineEnd);
// add parameters
dos.writeBytes(twoHyphens + boundary + lineEnd);
dos.writeBytes("Content-Disposition: form-data; name=\"expenses_2\"" + lineEnd);
dos.writeBytes(lineEnd);
// assign value
dos.writeBytes(exp2);
dos.writeBytes(lineEnd);
dos.writeBytes(twoHyphens + boundary + lineEnd);
// add parameters
dos.writeBytes(twoHyphens + boundary + lineEnd);
dos.writeBytes("Content-Disposition: form-data; name=\"expenses_3\"" + lineEnd);
dos.writeBytes(lineEnd);
// assign value
dos.writeBytes(exp3);
dos.writeBytes(lineEnd);
dos.writeBytes(twoHyphens + boundary + lineEnd);
if (expenseInputStream != null) {
dos.writeBytes(twoHyphens + boundary + lineEnd);
dos.writeBytes("Content-Disposition: form-data; name=\"expenses_1_file\";filename=\"" +
"expense1.jpg" + "\"" + lineEnd);
dos.writeBytes(lineEnd);
bytesAvailable = expenseInputStream.available();
bufferSize = Math.min(bytesAvailable, maxBufferSize);
buffer = new byte[bufferSize];
bytesRead = expenseInputStream.read(buffer, 0, bufferSize);
while (bytesRead > 0) {
dos.write(buffer, 0, bufferSize);
bytesAvailable = expenseInputStream.available();
bufferSize = Math.min(bytesAvailable, maxBufferSize);
bytesRead = expenseInputStream.read(buffer, 0, bufferSize);
}
dos.writeBytes(lineEnd);
dos.writeBytes(twoHyphens + boundary + twoHyphens + lineEnd);
expenseInputStream.close();
}
if (expenseInputStream1 != null) {
dos.writeBytes(twoHyphens + boundary + lineEnd);
dos.writeBytes("Content-Disposition: form-data; name=\"expenses_2_file\";filename=\"" +
"expense2.jpg" + "\"" + lineEnd);
dos.writeBytes(lineEnd);
bytesAvailable = expenseInputStream1.available();
bufferSize = Math.min(bytesAvailable, maxBufferSize);
buffer = new byte[bufferSize];
bytesRead = expenseInputStream1.read(buffer, 0, bufferSize);
while (bytesRead > 0) {
dos.write(buffer, 0, bufferSize);
bytesAvailable = expenseInputStream1.available();
bufferSize = Math.min(bytesAvailable, maxBufferSize);
bytesRead = expenseInputStream1.read(buffer, 0, bufferSize);
}
dos.writeBytes(lineEnd);
dos.writeBytes(twoHyphens + boundary + twoHyphens + lineEnd);
expenseInputStream1.close();
}
if (expenseInputStream2 != null) {
dos.writeBytes(twoHyphens + boundary + lineEnd);
dos.writeBytes("Content-Disposition: form-data; name=\"expenses_3_file\";filename=\"" +
"expense3.jpg" + "\"" + lineEnd);
dos.writeBytes(lineEnd);
bytesAvailable = expenseInputStream2.available();
bufferSize = Math.min(bytesAvailable, maxBufferSize);
buffer = new byte[bufferSize];
bytesRead = expenseInputStream2.read(buffer, 0, bufferSize);
while (bytesRead > 0) {
dos.write(buffer, 0, bufferSize);
bytesAvailable = expenseInputStream2.available();
bufferSize = Math.min(bytesAvailable, maxBufferSize);
bytesRead = expenseInputStream2.read(buffer, 0, bufferSize);
}
dos.writeBytes(lineEnd);
dos.writeBytes(twoHyphens + boundary + twoHyphens + lineEnd);
expenseInputStream2.close();
}
serverResponseCode = conn.getResponseCode();
Log.d("server_response", "Service response Code " + serverResponseCode);
dos.flush();
dos.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (ProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
Log.d("in2in", " serverResponseCode " + serverResponseCode);
if (serverResponseCode == 200) {
StringBuilder sb = new StringBuilder();
try {
BufferedReader rd = new BufferedReader(new InputStreamReader(conn.getInputStream()));
String line;
while ((line = rd.readLine()) != null) {
sb.append(line);
}
rd.close();
} catch (IOException ioex) {
}
Log.d("in2in", "img upload" + sb.toString());
return sb.toString();
} else {
StringBuilder sb = new StringBuilder();
try {
BufferedReader rd = new BufferedReader(new InputStreamReader(conn.getInputStream()));
String line;
while ((line = rd.readLine()) != null) {
sb.append(line);
}
rd.close();
} catch (IOException ioex) {
}
Log.d("in2in", "img upload" + sb.toString());
return "Could not upload";
}
}
}
仅供参考，我已经在服务器中授予了文件的写权限。
请帮我解决这个问题。