(Unicode C++) 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--

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--

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#include <CkHttpRequestW.h>

void ChilkatSample(void)
    {
    CkHttpRequestW req;

    req.put_HttpVerb(L"POST");
    req.put_Path(L"/something");
    req.put_ContentType(L"multipart/form-data");

    req.AddStringForUpload(L"fileA",L"fileA.txt",L"This is the contents of file A",L"utf-8");
    req.AddStringForUpload(L"fileB",L"fileB.txt",L"This is the contents of file B",L"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:
    wprintf(L"%s\n",req.generateRequestText());

    // If the Boundary property is set to a specific string, then the
    // request will use it:
    req.put_Boundary(L"ABC123HELLOWORLD");
    wprintf(L"%s\n",req.generateRequestText());
    }