Java

HTTP Request Boundary Property

Explains and demonstrates the HTTP request Boundary property. For multipart HTTP requests, Chilkat auto-generates a boundary string when the Boundary property is left unset (or empty). For example:

POST /something HTTP/1.1
Content-Type: multipart/form-data; boundary=------------090207000006060206010508
Host: domain
Content-Length: 378

--------------090207000006060206010508
Content-Disposition: form-data; name="fileA"; filename="fileA.txt"
Content-Type: text/plain

This is the contents of file A
--------------090207000006060206010508
Content-Disposition: form-data; name="fileB"; filename="fileB.txt"
Content-Type: text/plain

This is the contents of file B
--------------090207000006060206010508--

If the Boundary property is set, then Chilkat uses it. For example, if the Boundary property is set to "ABC123HELLOWORLD"

POST /something HTTP/1.1
Content-Type: multipart/form-data; boundary=ABC123HELLOWORLD
Host: domain
Content-Length: 318

--ABC123HELLOWORLD
Content-Disposition: form-data; name="fileA"; filename="fileA.txt"
Content-Type: text/plain

This is the contents of file A
--ABC123HELLOWORLD
Content-Disposition: form-data; name="fileB"; filename="fileB.txt"
Content-Type: text/plain

This is the contents of file B
--ABC123HELLOWORLD--

Chilkat2 Java

import com.chilkatsoft.chilkat2.HttpRequest;

public class ChilkatExample {

    public static void main(String[] args) {
        HttpRequest req = new HttpRequest();

        req.setHttpVerb("POST");
        req.setPath("/something");
        req.setContentType("multipart/form-data");

        req.addStringForUpload("fileA", "fileA.txt", "This is the contents of file A", "utf-8");
        req.addStringForUpload("fileB", "fileB.txt", "This is the contents of file B", "utf-8");

        // When the Boundary property is empty (has not yet been set)
        // Chilkat auto-generates a random boundary for the request.
        // This should almost always be sufficient.
        // For example, one can see the generated boundary here:
        System.out.println(req.generateRequestText());

        // If the Boundary property is set to a specific string, then the
        // request will use it:
        req.setBoundary("ABC123HELLOWORLD");
        System.out.println(req.generateRequestText());
    }
}