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POError in HTTPPost file upload to ASP.Net API
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copied!<p>I am using android to try and upload a file to my server, which is running an asp.net mvc4 web api. My android class is as follows:</p> <pre><code>package com.example.wsis; import java.io.ByteArrayOutputStream; import java.util.ArrayList; import java.util.concurrent.ExecutionException; import org.apache.http.HttpEntity; import org.apache.http.HttpResponse; import org.apache.http.NameValuePair; import org.apache.http.client.HttpClient; import org.apache.http.client.entity.UrlEncodedFormEntity; import org.apache.http.client.methods.HttpPost; import org.apache.http.impl.client.DefaultHttpClient; import org.apache.http.message.BasicNameValuePair; import org.apache.http.util.EntityUtils; import android.app.Activity; import android.content.Intent; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.net.Uri; import android.os.AsyncTask; import android.os.Bundle; import android.provider.MediaStore; import android.util.Base64; import android.util.Log; import android.view.Menu; import android.view.View; import android.widget.Button; import android.widget.TextView; public class UploadImage extends Activity implements View.OnClickListener { Button upload_btn, uploader; Uri currImageURI; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_upload_image); upload_btn = (Button) this.findViewById(R.id.btnUpload); uploader = (Button) this.findViewById(R.id.btnUploadFile); upload_btn.setOnClickListener(this); uploader.setOnClickListener(this); } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.upload_image, menu); return true; } @Override public void onClick(View v) { switch (v.getId()) { case R.id.btnUpload: Intent intent = new Intent(); intent.setType("image/*"); intent.setAction(Intent.ACTION_GET_CONTENT); startActivityForResult(Intent.createChooser(intent, "Select Picture"),1); break; case R.id.btnUploadFile: HttpUploader uploader = new HttpUploader(); try { String image_name = uploader.execute(getRealPathFromURI(currImageURI)).get(); } catch (InterruptedException e) { e.printStackTrace(); } catch (ExecutionException e) { e.printStackTrace(); } break; } } // To handle when an image is selected from the browser public void onActivityResult(int requestCode, int resultCode, Intent data) { if (resultCode == RESULT_OK) { if (requestCode == 1) { // currImageURI is the global variable I’m using to hold the content: currImageURI = data.getData(); System.out.println("Current image Path is ----->" + getRealPathFromURI(currImageURI)); TextView tv_path = (TextView) findViewById(R.id.path); tv_path.setText(getRealPathFromURI(currImageURI)); } } } //Convert the image URI to the direct file system path of the image file public String getRealPathFromURI(Uri contentUri) { String [] proj={MediaStore.Images.Media.DATA}; android.database.Cursor cursor = managedQuery( contentUri, proj, // Which columns to return null, // WHERE clause; which rows to return (all rows) null, // WHERE clause selection arguments (none) null); // Order-by clause (ascending by name) int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA); cursor.moveToFirst(); return cursor.getString(column_index); } public class HttpUploader extends AsyncTask<String, Void, String> { @Override protected String doInBackground(String... path) { String outPut = null; for (String sdPath : path) { Bitmap bitmapOrg = BitmapFactory.decodeFile(sdPath); ByteArrayOutputStream bao = new ByteArrayOutputStream(); //Resize the image double width = bitmapOrg.getWidth(); double height = bitmapOrg.getHeight(); double ratio = 400/width; int newheight = (int)(ratio*height); System.out.println("———-width" + width); System.out.println("———-height" + height); bitmapOrg = Bitmap.createScaledBitmap(bitmapOrg, 400, newheight, true); //Here you can define .PNG as well bitmapOrg.compress(Bitmap.CompressFormat.JPEG, 95, bao); byte[] ba = bao.toByteArray(); String ba1 = Base64.encodeToString(ba, Base64.NO_WRAP); System.out.println("uploading image now ——–" + ba1); ArrayList<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(); nameValuePairs.add(new BasicNameValuePair("image", ba1)); try { HttpClient httpclient = new DefaultHttpClient(); HttpPost httppost = new HttpPost("http://proopt.co.za.winhost.wa.co.za/api/Files/"); httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs)); HttpResponse response = httpclient.execute(httppost); HttpEntity entity = response.getEntity(); // print response outPut = EntityUtils.toString(entity); Log.i("GET RESPONSE—-", outPut); //is = entity.getContent(); Log.e("log_tag ******", "good connection"); bitmapOrg.recycle(); } catch (Exception e) { Log.e("log_tag ******", "Error in http connection " + e.toString()); } } return outPut; } } } </code></pre> <p>And my asp.net controller class is:</p> <pre><code>public class FilesController : ApiController { // GET api/files public IEnumerable<string> Get() { return new string[] { "value1", "value2" }; } // GET api/files/5 public string Get(int id) { return "value"; } // POST api/files public HttpResponseMessage Post(string filename) { var task = this.Request.Content.ReadAsStreamAsync(); task.Wait(); Stream requestStream = task.Result; try { Stream fileStream = File.Create(HttpContext.Current.Server.MapPath("~/" + filename)); requestStream.CopyTo(fileStream); fileStream.Close(); requestStream.Close(); } catch (IOException) { // throw new HttpResponseException("A generic error occured. Please try again later.", HttpStatusCode.InternalServerError); } HttpResponseMessage response = new HttpResponseMessage(); response.StatusCode = HttpStatusCode.Created; return response; } // PUT api/files/5 public void Put(int id, [FromBody]string value) { } // DELETE api/files/5 public void Delete(int id) { } } </code></pre> <p>Here is global.asax.cs</p> <pre><code>using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.Http; using System.Web.Mvc; using System.Web.Optimization; using System.Web.Routing; namespace WSISWebService { // Note: For instructions on enabling IIS6 or IIS7 classic mode, // visit http://go.microsoft.com/?LinkId=9394801 public class WebApiApplication : System.Web.HttpApplication { protected void Application_Start() { AreaRegistration.RegisterAllAreas(); WebApiConfig.Register(GlobalConfiguration.Configuration); FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters); RouteConfig.RegisterRoutes(RouteTable.Routes); BundleConfig.RegisterBundles(BundleTable.Bundles); } public static void RegisterRoutes(RouteCollection routes) { routes.MapHttpRoute( name: "DefaultApi", routeTemplate: "{controller}/{filename}", defaults: new { filename = RouteParameter.Optional } ); } } } </code></pre> <p>I am pretty desperate to get this working, can anybody assist me??</p> <p>UPDATE: I have managed to "find" the post method, but I just can't seem to get android to send the file, can somebody please help me code the server side post method???</p>

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