Rust

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--

Rust

let req = chilkat::HttpRequest::new();

req.set_http_verb("POST");
req.set_path("/something");
req.set_content_type("multipart/form-data");

let _ = req.add_string_for_upload("fileA", "fileA.txt", "This is the contents of file A", "utf-8");
let _ = req.add_string_for_upload("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:
println!("{}", req.generate_request_text().unwrap_or_default());

// If the Boundary property is set to a specific string, then the
// request will use it:
req.set_boundary("ABC123HELLOWORLD");
println!("{}", req.generate_request_text().unwrap_or_default());