Android: Sending a byte[] array via Http POST

Question

I am able to do a POST of a parameters string. I use the following code:

String parameters = "firstname=john&lastname=doe";
URL url = new URL("http://www.mywebsite.com");
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setDoOutput(true);
connection.setRequestProperty("Content-Type","application/x-www-form-urlencoded");
connection.setRequestMethod("POST");

OutputStreamWriter out = new OutputStreamWriter(connection.getOutputStream());
out.write(parameters);
out.flush();
out.close();
connection.disconnect();

However, I need to do a POST of binary data (which is in form of byte[]).

Not sure how to change the above code to implement it.
Could anyone please help me with this?

Community · Accepted Answer · 2017-05-23 12:10:48Z

9

Take a look here Sending POST data in Android

But use ByteArrayEntity.

byte[] content = ...
HttpPost httpPost = new HttpPost(url);
httpPost.setEntity(new ByteArrayEntity(content));           
HttpResponse response = httpClient.execute(httpPost);

edited May 23, 2017 at 12:10

CommunityBot

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answered Jul 25, 2012 at 22:32

Fabio Falci

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1 Comment

insanely_sin Over a year ago

It is taking a very long time (8 sec) to execute this line "httpPost.setEntity(new ByteArrayEntity(content));" sometimes in my code. Do you have any idea why this can happen ?

kabuko · Accepted Answer · 2011-06-15 17:59:34Z

6

You could base-64 encode your data first. Take a look at the aptly named Base64 class.

answered Jun 15, 2011 at 17:59

kabuko

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1 Comment

OceanBlue Over a year ago

+1 for the idea. Unfortunately I cannot do use Base64 since the server does not expect it. (I cannot make change to the server as it caters to many client applications)

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