Java: Adding raw data to payload Httpost request

java http-post payload
James Mclaren picture James Mclaren · Nov 20, 2013 · Viewed 34.6k times · Source

I intend to send a simple http post request with a large string in the Payload.

So far I have the following.

    DefaultHttpClient httpclient = new DefaultHttpClient();


    HttpPost httppost = new HttpPost("address location");

    String cred = "un:pw";

    byte[] authEncBytes = Base64.encodeBase64(cred.getBytes());
    String authStringEnc = new String(authEncBytes);



    httppost.setHeader("Authorization","Basic " + authStringEnc);

However, I do not know how to attach a simple RAW string into the payload. The only examples I can find are name value pairs into the Entity but this is not what I want.

Any assistance?

Answer

isnot2bad picture isnot2bad · Nov 20, 2013

It depends on the concrete HTTP-API you're using:

Commons HttpClient (old - end of life)

Since HttpClient 3.0 you can specify a RequestEntity for your PostMethod:

httpPost.setRequestEntity(new StringRequestEntity(stringData));

Implementations of RequestEntity for binary data are ByteArrayRequestEntity for byte[], FileRequestEntity which reads the data from a file (since 3.1) and InputStreamRequestEntity, which can read from any input stream.

Before 3.0 you can directly set a String or an InputStream, e.g. a ByteArrayInputStream, as request body:

httpPost.setRequestBody(stringData);

or

httpPost.setRequestBody(new ByteArrayInputStream(byteArray));

This methods are deprecated now.

HTTP components (new)

If you use the newer HTTP components API, the method, class and interface names changed a little bit, but the concept is the same:

httpPost.setEntity(new StringEntity(stringData));

Other Entity implementations: ByteArrayEntity, InputStreamEntity, FileEntity, ...

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