(Objective-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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#import <CkoHttpRequest.h>

CkoHttpRequest *req = [[CkoHttpRequest alloc] init];

req.HttpVerb = @"POST";
req.Path = @"/something";
req.ContentType = @"multipart/form-data";

[req AddStringForUpload: @"fileA" filename: @"fileA.txt" strData: @"This is the contents of file A" charset: @"utf-8"];
[req AddStringForUpload: @"fileB" filename: @"fileB.txt" strData: @"This is the contents of file B" charset: @"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:
NSLog(@"%@",[req GenerateRequestText]);

// If the Boundary property is set to a specific string, then the
// request will use it:
req.Boundary = @"ABC123HELLOWORLD";
NSLog(@"%@",[req GenerateRequestText]);