How to upload a file using Java HttpClient library working with PHP

Question

I want to write Java application that will upload a file to the Apache server with PHP  The Java code uses Jakarta HttpClient library version 4 0 beta2   import java io File  import org apache http HttpEntity  import org apache http HttpResponse  import org apache http HttpVersion  import org apache http client HttpClient  import org apache http client methods HttpPost  import org apache http entity FileEntity  import org apache http impl client DefaultHttpClient  import org apache http params CoreProtocolPNames  import org apache http util EntityUtils    public class PostFile     public static void main String   args  throws Exception       HttpClient httpclient   new DefaultHttpClient        httpclient getParams   setParameter CoreProtocolPNames PROTOCOL VERSION  HttpVersion HTTP 1 1        HttpPost httppost   new HttpPost  http   localhost 9002 upload php        File file   new File  c  TRASH zaba 1 jpg         FileEntity reqEntity   new FileEntity file   binary octet-stream         httppost setEntity reqEntity       reqEntity setContentType  binary octet-stream        System out println  executing request     httppost getRequestLine         HttpResponse response   httpclient execute httppost       HttpEntity resEntity   response getEntity         System out println response getStatusLine         if  resEntity    null          System out println EntityUtils toString resEntity              if  resEntity    null          resEntity consumeContent               httpclient getConnectionManager   shutdown            The PHP file upload php is very simple    lt  php if  is uploaded file   FILES  userfile    tmp name         echo  File      FILES  userfile    name      uploaded successfully  n     move uploaded file    FILES  userfile     tmp name      FILES  userfile     name       else     echo  Possible file upload attack       echo  filename       FILES  userfile    tmp name             print r   FILES       gt    Reading the response I get the following result   executing request POST http   localhost 9002 upload php HTTP 1 1    HTTP 1 1 200 OK Possible file upload attack  filename     Array       So the request was successful  I was able to communicate with server  however PHP didn t notice the file - the method is uploaded file returned false and   FILES variable is empty  I have no idea why this might happend  I have tracked HTTP response and request and they look ok  request is    POST  upload php HTTP 1 1 Content-Length  13091 Content-Type  binary octet-stream Host  localhost 9002 Connection  Keep-Alive User-Agent  Apache-HttpClient 4 0-beta2  java 1 5  Expect  100-Continue   R r      the rest of the binary file      and response    HTTP 1 1 100 Continue  HTTP 1 1 200 OK Date  Wed  01 Jul 2009 06 51 57 GMT Server  Apache 2 2 8  Win32  DAV 2 mod ssl 2 2 8 OpenSSL 0 9 8g mod autoindex color PHP 5 2 5 mod jk 1 2 26 X-Powered-By  PHP 5 2 5 Content-Length  51 Keep-Alive  timeout 5  max 100 Connection  Keep-Alive Content-Type  text html  Possible file upload attack  filename    Array       I was testing this both on the local windows xp with xampp and remote Linux server  I have also tried to use previous version of HttpClient - version 3 1 - and the result was even more unclear  is uploaded file returned false  however   FILES array was filled with proper data

User · Answer

An update for those trying to use MultipartEntity     org apache http entity mime MultipartEntity is deprecated in 4 3 1   You can use MultipartEntityBuilder to create the HttpEntity object   File file   new File     HttpEntity httpEntity   MultipartEntityBuilder create        addBinaryBody  file   file  ContentType create  image jpeg    file getName         build      For Maven users the class is available in the following dependency  almost the same as fervisa s answer  just with a later version     lt dependency gt     lt groupId gt org apache httpcomponents lt  groupId gt     lt artifactId gt httpmime lt  artifactId gt     lt version gt 4 3 1 lt  version gt   lt  dependency gt

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A newer version example is here   Below is a copy of the original code                                                                                  Licensed to the Apache Software Foundation  ASF  under one    or more contributor license agreements   See the NOTICE file    distributed with this work for additional information    regarding copyright ownership   The ASF licenses this file    to you under the Apache License  Version 2 0  the     License    you may not use this file except in compliance    with the License   You may obtain a copy of the License at         http   www apache org licenses LICENSE-2 0       Unless required by applicable law or agreed to in writing     software distributed under the License is distributed on an     AS IS  BASIS  WITHOUT WARRANTIES OR CONDITIONS OF ANY    KIND  either express or implied   See the License for the    specific language governing permissions and limitations    under the License                                                                                This software consists of voluntary contributions made by many    individuals on behalf of the Apache Software Foundation   For more    information on the Apache Software Foundation  please see     lt http   www apache org  gt          package org apache http examples entity mime   import java io File   import org apache http HttpEntity  import org apache http client methods CloseableHttpResponse  import org apache http client methods HttpPost  import org apache http entity ContentType  import org apache http entity mime MultipartEntityBuilder  import org apache http entity mime content FileBody  import org apache http entity mime content StringBody  import org apache http impl client CloseableHttpClient  import org apache http impl client HttpClients  import org apache http util EntityUtils          Example how to use multipart form encoded POST request      public class ClientMultipartFormPost        public static void main String   args  throws Exception           if  args length    1                 System out println  File path not given                System exit 1                     CloseableHttpClient httpclient   HttpClients createDefault            try               HttpPost httppost   new HttpPost  http   localhost 8080                          servlets-examples servlet RequestInfoExample                 FileBody bin   new FileBody new File args 0                 StringBody comment   new StringBody  A binary file of some kind   ContentType TEXT PLAIN                HttpEntity reqEntity   MultipartEntityBuilder create                        addPart  bin   bin                       addPart  comment   comment                       build                  httppost setEntity reqEntity                System out println  executing request     httppost getRequestLine                 CloseableHttpResponse response   httpclient execute httppost               try                   System out println  ----------------------------------------                    System out println response getStatusLine                     HttpEntity resEntity   response getEntity                    if  resEntity    null                        System out println  Response content length      resEntity getContentLength                                       EntityUtils consume resEntity                 finally                   response close                            finally               httpclient close

User · Answer

Aah you just need  to add a name parameter in the   FileBody constructor  ContentBody cbFile   new FileBody file   image jpeg    FILE NAME      Hope it helps

User · Answer

The correct way will be to use multipart POST method  See here for example code for the client   For PHP there are many tutorials available  This is the first I ve found  I recommend that you test the PHP code first using an html client and then try the java client

User · Answer

Ok  the Java code I used was wrong  here comes the right Java class   import java io File  import org apache http HttpEntity  import org apache http HttpResponse  import org apache http HttpVersion  import org apache http client HttpClient  import org apache http client methods HttpPost  import org apache http entity mime MultipartEntity  import org apache http entity mime content ContentBody  import org apache http entity mime content FileBody  import org apache http impl client DefaultHttpClient  import org apache http params CoreProtocolPNames  import org apache http util EntityUtils    public class PostFile     public static void main String   args  throws Exception       HttpClient httpclient   new DefaultHttpClient        httpclient getParams   setParameter CoreProtocolPNames PROTOCOL VERSION  HttpVersion HTTP 1 1        HttpPost httppost   new HttpPost  http   localhost 9001 upload php        File file   new File  c  TRASH zaba 1 jpg         MultipartEntity mpEntity   new MultipartEntity        ContentBody cbFile   new FileBody file   image jpeg        mpEntity addPart  userfile   cbFile         httppost setEntity mpEntity       System out println  executing request     httppost getRequestLine         HttpResponse response   httpclient execute httppost       HttpEntity resEntity   response getEntity         System out println response getStatusLine         if  resEntity    null          System out println EntityUtils toString resEntity              if  resEntity    null          resEntity consumeContent               httpclient getConnectionManager   shutdown            note using MultipartEntity

User · Answer

If you are testing this on your local WAMP you might need to set up the temporary folder for file uploads  You can do this in your PHP ini file   upload tmp dir    c  mypath mytempfolder     You will need to grant permissions on the folder to allow the upload to take place - the permission you need to grant vary based on your operating system

User · Answer

There is my working solution for sending image with post  using apache http libraries  very important here is boundary add It won t work without it in my connection                ByteArrayOutputStream baos   new ByteArrayOutputStream                bitmap compress Bitmap CompressFormat PNG  100  baos               byte   imageBytes   baos toByteArray                 HttpClient httpclient   new DefaultHttpClient                HttpPost httpPost   new HttpPost StaticData AMBAJE SERVER URL   StaticData AMBAJE ADD AMBAJ TO GROUP                String boundary    -------------    System currentTimeMillis                 httpPost setHeader  Content-type    multipart form-data  boundary   boundary                ByteArrayBody bab   new ByteArrayBody imageBytes   pic png                StringBody sbOwner   new StringBody StaticData loggedUserId  ContentType TEXT PLAIN               StringBody sbGroup   new StringBody  group   ContentType TEXT PLAIN                HttpEntity entity   MultipartEntityBuilder create                        setMode HttpMultipartMode BROWSER COMPATIBLE                       setBoundary boundary                       addPart  group   sbGroup                       addPart  owner   sbOwner                       addPart  image   bab                       build                 httpPost setEntity entity                try                   HttpResponse response   httpclient execute httpPost                      then reading response

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For those having a hard time implementing the accepted answer  which requires org apache http entity mime MultipartEntity  you may be using org apache httpcomponents 4 2   In this case  you have to explicitly install httpmime dependency  in my case    lt dependency gt       lt groupId gt org apache httpcomponents lt  groupId gt       lt artifactId gt httpmime lt  artifactId gt       lt version gt 4 2 5 lt  version gt   lt  dependency gt

User · Answer

I knew I am late to the party but below is the correct way to deal with this  the key is to use InputStreamBody in place of FileBody to upload multi-part file       try           HttpClient httpclient   new DefaultHttpClient            HttpPost postRequest   new HttpPost  https   someserver com api path             postRequest addHeader  Authorization  authHeader             don t set the content type here                       postRequest addHeader  Content-Type   multipart form-data            MultipartEntity reqEntity   new MultipartEntity HttpMultipartMode BROWSER COMPATIBLE             File file   new File filePath           FileInputStream fileInputStream   new FileInputStream file           reqEntity addPart  parm-name   new InputStreamBody fileInputStream  image jpeg   file name jpg              postRequest setEntity reqEntity           HttpResponse response   httpclient execute postRequest             catch Exception e                Log e  URISyntaxException   e toString

User · Answer

I ran into the same problem and found out that the file name is required for httpclient 4 x to be working with PHP backend  It was not the case for httpclient 3 x   So my solution is to add a name parameter in the FileBody constructor  ContentBody cbFile   new FileBody file   image jpeg    FILE NAME     Hope it helps

[java] How to upload a file using Java HttpClient library working with PHP

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