Sample code for 30+ languages & platforms
Java

Example: Http.HttpFile method

Shows how to use the HttpFile method to send an HTTP POST request with the contents of a file as the request body. The example sends the following request:
POST /api/v1/sites/123/deploys HTTP/1.1
Host: example.com
Accept: */*
Accept-Encoding: gzip
Content-Type: application/zip
Content-Length: 123456

[binary data bytes of data.zip]

Also see: Chilkat Http Default and Auto-Filled Headers

Chilkat Java Downloads

Java
import com.chilkatsoft.*;

public class ChilkatExample {

  static {
    try {
        System.loadLibrary("chilkat");
    } catch (UnsatisfiedLinkError e) {
      System.err.println("Native code library failed to load.\n" + e);
      System.exit(1);
    }
  }

  public static void main(String argv[])
  {
    boolean success = false;

    CkHttp http = new CkHttp();

    String localFilePath = "C:/example/zips/data.zip";
    String url = "https://example.com/api/v1/sites/123/deploys";

    //  Send a POST with the contents of the file in the binary HTTP request body.
    CkHttpResponse resp = new CkHttpResponse();
    success = http.HttpFile("POST",url,localFilePath,"application/zip",resp);
    if (success == false) {
        System.out.println(http.lastErrorText());
        return;
        }

    System.out.println("Response Status Code: " + resp.get_StatusCode());
    System.out.println("Response body:");
    System.out.println(resp.bodyStr());
  }
}