Asked  7 Months ago    Answers:  5   Viewed   41 times

I've been looking for a solution to this for hours, but I can't find any.

Basically, I want to upload, from my android device, files to an http website. However, I have no clue whatsoever how to do this. I'm using java on the device, and I would like to use PHP on the server-side of things. I just want to upload the files, not do anything fancy with them on the server.

Can anyone provide code and/or a good link to what I need? I have little to no experience in this, and I am at a loss.

Thanks, NS

PS. I have no experience in PHP coding.

 Answers

64

Yeah, so I found the java-side of things. This works, so... yeah.

public class Uploader extends Activity {

    private String Tag = "UPLOADER";
    private String urlString = "YOUR_ONLINE_PHP";
    HttpURLConnection conn;

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        String exsistingFileName = "/sdcard/uploader/data/testfile";

        String lineEnd = "rn";
        String twoHyphens = "--";
        String boundary = "*****";
        try {
            // ------------------ CLIENT REQUEST

            Log.e(Tag, "Inside second Method");

            FileInputStream fileInputStream = new FileInputStream(new File(
                    exsistingFileName));

            // open a URL connection to the Servlet

            URL url = new URL(urlString);

            // 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);

            // Use a post method.
            conn.setRequestMethod("POST");

            conn.setRequestProperty("Connection", "Keep-Alive");

            conn.setRequestProperty("Content-Type",
                    "multipart/form-data;boundary=" + boundary);

            DataOutputStream dos = new DataOutputStream(conn.getOutputStream());

            dos.writeBytes(twoHyphens + boundary + lineEnd);
            dos
                    .writeBytes("Content-Disposition: post-data; name=uploadedfile;filename="
                            + exsistingFileName + "" + lineEnd);
            dos.writeBytes(lineEnd);

            Log.e(Tag, "Headers are written");

            // create a buffer of maximum size

            int bytesAvailable = fileInputStream.available();
            int maxBufferSize = 1000;
            // int bufferSize = Math.min(bytesAvailable, maxBufferSize);
            byte[] buffer = new byte[bytesAvailable];

            // read file and write it into form...

            int bytesRead = fileInputStream.read(buffer, 0, bytesAvailable);

            while (bytesRead > 0) {
                dos.write(buffer, 0, bytesAvailable);
                bytesAvailable = fileInputStream.available();
                bytesAvailable = Math.min(bytesAvailable, maxBufferSize);
                bytesRead = fileInputStream.read(buffer, 0, bytesAvailable);
            }

            // send multipart form data necesssary after file data...

            dos.writeBytes(lineEnd);
            dos.writeBytes(twoHyphens + boundary + twoHyphens + lineEnd);

            // close streams
            Log.e(Tag, "File is written");
            fileInputStream.close();
            dos.flush();
            dos.close();

        } catch (MalformedURLException ex) {
            Log.e(Tag, "error: " + ex.getMessage(), ex);
        }

        catch (IOException ioe) {
            Log.e(Tag, "error: " + ioe.getMessage(), ioe);
        }

        try {
            BufferedReader rd = new BufferedReader(new InputStreamReader(conn
                    .getInputStream()));
            String line;
            while ((line = rd.readLine()) != null) {
                Log.e("Dialoge Box", "Message: " + line);
            }
            rd.close();

        } catch (IOException ioex) {
            Log.e("MediaPlayer", "error: " + ioex.getMessage(), ioex);
        }
    }
}
Wednesday, March 31, 2021
 
mario
answered 7 Months ago
63

I don't know about your code but providing you both working codes: This is for all types of files. I used it for image, audio and for video files.

Android:

new UploadFileAsync().execute("");



  private class UploadFileAsync extends AsyncTask<String, Void, String> {

    @Override
    protected String doInBackground(String... params) {

        try {
  String sourceFileUri = "/mnt/sdcard/abc.png";

            HttpURLConnection conn = null;
            DataOutputStream dos = null;
            String lineEnd = "rn";
            String twoHyphens = "--";
            String boundary = "*****";
            int bytesRead, bytesAvailable, bufferSize;
            byte[] buffer;
            int maxBufferSize = 1 * 1024 * 1024;
            File sourceFile = new File(sourceFileUri);

            if (sourceFile.isFile()) {

                try {
                    String upLoadServerUri = "http://website.com/abc.php?";

                    // open a URL connection to the Servlet
                    FileInputStream fileInputStream = new FileInputStream(
                            sourceFile);
                    URL url = new URL(upLoadServerUri);

                    // Open a HTTP connection to the URL
                    conn = (HttpURLConnection) url.openConnection();
                    conn.setDoInput(true); // Allow Inputs
                    conn.setDoOutput(true); // Allow Outputs
                    conn.setUseCaches(false); // Don't use a Cached Copy
                    conn.setRequestMethod("POST");
                    conn.setRequestProperty("Connection", "Keep-Alive");
                    conn.setRequestProperty("ENCTYPE",
                            "multipart/form-data");
                    conn.setRequestProperty("Content-Type",
                            "multipart/form-data;boundary=" + boundary);
                    conn.setRequestProperty("bill", sourceFileUri);

                    dos = new DataOutputStream(conn.getOutputStream());

                    dos.writeBytes(twoHyphens + boundary + lineEnd);
                    dos.writeBytes("Content-Disposition: form-data; name="bill";filename=""
                            + sourceFileUri + """ + lineEnd);

                    dos.writeBytes(lineEnd);

                    // 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);

                    }

                    // send multipart form data necesssary after file
                    // data...
                    dos.writeBytes(lineEnd);
                    dos.writeBytes(twoHyphens + boundary + twoHyphens
                            + lineEnd);

                    // Responses from the server (code and message)
                    serverResponseCode = conn.getResponseCode();
                    String serverResponseMessage = conn
                            .getResponseMessage();

                    if (serverResponseCode == 200) {

                        // messageText.setText(msg);
                        //Toast.makeText(ctx, "File Upload Complete.",
                        //      Toast.LENGTH_SHORT).show();

                        // recursiveDelete(mDirectory1);

                    }

                    // close the streams //
                    fileInputStream.close();
                    dos.flush();
                    dos.close();

                } catch (Exception e) {

                    // dialog.dismiss();
                    e.printStackTrace();

                }
                // dialog.dismiss();

            } // End else block


        } catch (Exception ex) {
            // dialog.dismiss();

            ex.printStackTrace();
        }
        return "Executed";
    }

    @Override
    protected void onPostExecute(String result) {

    }

    @Override
    protected void onPreExecute() {
    }

    @Override
    protected void onProgressUpdate(Void... values) {
    }
}

PHP::

 <?php


     if (is_uploaded_file($_FILES['bill']['tmp_name'])) {
    $uploads_dir = './';
                            $tmp_name = $_FILES['bill']['tmp_name'];
                            $pic_name = $_FILES['bill']['name'];
                            move_uploaded_file($tmp_name, $uploads_dir.$pic_name);
                            }
               else{
                   echo "File not uploaded successfully.";
           }

   ?>
Wednesday, March 31, 2021
 
the_e
answered 7 Months ago
15

Just add a a few FormBodyPart to your MultipartEntity.

You can use the StringBody object to provide the value.

Here is an example of how you can use it:

byte[] data = {10,10,10,10,10}; 
HttpClient httpClient = new DefaultHttpClient();
HttpPost postRequest = new HttpPost("server url");
ByteArrayBody bab = new ByteArrayBody(data, "image.jpg");
MultipartEntity reqEntity = new MultipartEntity(HttpMultipartMode.BROWSER_COMPATIBLE);
reqEntity.addPart("image", bab);

FormBodyPart bodyPart=new FormBodyPart("formVariableName", new StringBody("formValiableValue"));
reqEntity.addPart(bodyPart);
bodyPart=new FormBodyPart("formVariableName2", new StringBody("formValiableValue2"));
reqEntity.addPart(bodyPart);
bodyPart=new FormBodyPart("formVariableName3", new StringBody("formValiableValue3"));
reqEntity.addPart(bodyPart); 
postRequest.setEntity(reqEntity);
HttpResponse response = httpClient.execute(postRequest);
BufferedReader in = new BufferedReader(new InputStreamReader(response.getEntity().getContent()));
String line = null;
while((line = in.readLine()) != null) {
    System.out.println(line);
}

Here is the output of the PHP script:

$_FILES
Array
(
    [image] => Array
        (
            [name] => image.jpg
            [type] => application/octet-stream
            [tmp_name] => /tmp/php6UHywL
            [error] => 0
            [size] => 5
        )

)
$_POST:
Array
(
    [formVariableName] => formValiableValue
    [formVariableName2] => formValiableValue2
    [formVariableName3] => formValiableValue3
)

This doesn't compress all the post vars inside of one content body part but it dose the job.

You can't access the data from php://stdin or $HTTP_RAW_POST_DATA, both are unavailable for multipart/form-data encoding. From the PHP docs:

php://input is a read-only stream that allows you to read raw data from the request body. In the case of POST requests, it is preferable to use php://input instead of $HTTP_RAW_POST_DATA as it does not depend on special php.ini directives. Moreover, for those cases where $HTTP_RAW_POST_DATA is not populated by default, it is a potentially less memory intensive alternative to activating always_populate_raw_post_data. php://input is not available with enctype="multipart/form-data".

Even if you set always_populate_raw_post_data to On it still won't fix the problem:

Always populate the $HTTP_RAW_POST_DATA containing the raw POST data. Otherwise, the variable is populated only with unrecognized MIME type of the data. However, the preferred method for accessing the raw POST data is php://input. $HTTP_RAW_POST_DATA is not available with enctype="multipart/form-data".

My best guess is just add all the data as a ByteArrayBody or StringBody and just use that as if you were reading from php://stdin

Here is an example of ByteArrayBody:

String testString="b=a&c=a&d=a&Send=Send";
reqEntity.addPart(new FormBodyPart("formVariables", new ByteArrayBody(testString.getBytes(), "application/x-www-form-urlencoded", "formVariables")));

And in PHP:

var_dump(file_get_contents($_FILES['formVariables']['tmp_name']));

You should get:

string(21) "b=a&c=a&d=a&Send=Send"

Edit: After some second thoughts I think it's better to just use one StringBody and put all the data in one post variable, then parse it from that, it skips writing the data to a file and deleting it after the request since the temp file is totally useless this will increase performance. Here is an example:

String testString="b=a&c=a&d=a&Send=Send";
bodyPart=new FormBodyPart("rawData", new StringBody(testString));
reqEntity.addPart(bodyPart);

Then from PHP:

var_dump($_POST['rawData']);
Friday, July 23, 2021
 
Saurabh
answered 3 Months ago
68

It's an unknown to you what user-installed file browser apps your intent may trigger. I think this is a case where's it's better to hand roll something. My approach was to

a) Find all files with a particular extension on external media with something like (I was looking for the .saf extension, so you'd alter for .pdf accordingly):

    public ArrayList<String> findSAFs(File dir, ArrayList<String> matchingSAFFileNames) {
    String safPattern = ".saf";

    File listFile[] = dir.listFiles();

    if (listFile != null) {
        for (int i = 0; i < listFile.length; i++) {

            if (listFile[i].isDirectory()) {
                findSAFs(listFile[i], matchingSAFFileNames);
            } else {
              if (listFile[i].getName().endsWith(safPattern)){
                  matchingSAFFileNames.add(dir.toString() + File.separator + listFile[i].getName());
                  //System.out.println("Found one! " + dir.toString() + listFile[i].getName());
              }
            }
        }
    }    
    //System.out.println("Outgoing size: " + matchingSAFFileNames.size());  
    return matchingSAFFileNames;
}

b) Get that result into a ListView and let the user touch the file s/he wants. You can make the list as fancy as you want -- show thumbnails, plus filename, etc.

It sounds like it would take a long time, but it didn't and you then know the behavior for every device.

Friday, July 30, 2021
 
fret
answered 3 Months ago
45

The client side of the SSE connection looks OK as far as I can tell - though I moved the var textarea..... outside of the onmessage handler.

UPDATE: I should have looked closer but the event to monitor is event1 so we need to set an event listener for that event.

<script>
    if( typeof( EventSource ) !== "undefined" ) {
        var url = 'handler.php'

        var source = new EventSource( url );
        var textarea = document.getElementById("subtitles");


        source.addEventListener('event1', function(e){
            textarea.value += e.data;
            textarea.scrollTop = textarea.scrollHeight;
            console.info(e.data);
        },false );

    } else {
        document.getElementById("subtitles").value = "Server-sent events not supported.";
    }
</script>

As for the SSE server script I tend to employ a method like this

<?php
    /* make sure the script does not timeout */
    set_time_limit( 0 );
    ini_set('auto_detect_line_endings', 1);
    ini_set('max_execution_time', '0');

    /* start fresh */
    ob_end_clean();


    /* ultility function for sending SSE messages */
    function sse( $evtname='sse', $data=null, $retry=1000 ){
        if( !is_null( $data ) ){
            echo "event:".$evtname."rn";
            echo "retry:".$retry."rn";
            echo "data:" . json_encode( $data, JSON_FORCE_OBJECT | JSON_HEX_QUOT | JSON_HEX_TAG | JSON_HEX_AMP | JSON_HEX_APOS );
            echo "rnrn";
        }
    }



    $id = 0;
    $event = 'event1';
    $oldValue = null;

    header('Content-Type: text/event-stream');
    header('Cache-Control: no-cache');
    header('X-Accel-Buffering: no');





    while( true ){
        try {
            $data = @file_get_contents( 'liveData.txt' );
        } catch( Exception $e ) {
            $data = $e->getMessage();
        }

        if( $oldValue !== $data ) {

            /* data has changed or first iteration */
            $oldValue = $data;

            /* send the sse message */
            sse( $event, $data );

            /* make sure all buffers are cleansed */
            if( @ob_get_level() > 0 ) for( $i=0; $i < @ob_get_level(); $i++ ) @ob_flush();
            @flush();           
        }



        /* 
            sleep each iteration regardless of whether the data has changed or not.... 
        */
        sleep(1);
    }



    if( @ob_get_level() > 0 ) {
        for( $i=0; $i < @ob_get_level(); $i++ ) @ob_flush();
        @ob_end_clean();
    }
?>
Wednesday, September 1, 2021
 
lechup
answered 2 Months ago
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