(Objective-C) Extract Files from Binary SOAP MTOM MIME

This example demonstrates how to extract files from a binary SOAP MTOM MIME document.

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#import <CkoMime.h>
#import <CkoStringBuilder.h>
#import <NSString.h>

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

CkoMime *mime = [[CkoMime alloc] init];

// In this example, we have a MIME file containing 8bit (non-encoded) binary data,
// and it is what I call "headless".  MIME is headless when it omits
// the top-level header.  The file we have here begins with the first
// boundary string.

// The structure the MIME to be loaded is:

// multipart/mixed (inferred because it is headless)
//     application/xop+xml
//     image/jpeg
//     image/gif
//     image/gif
// 

BOOL success = [mime LoadMimeFile: @"qa_data/mime/headless_binary_soap_mtom_mime.mim"];
if (success != YES) {
    NSLog(@"%@",mime.LastErrorText);
    return;
}

// The MIME file loaded in this example contains this:

// --uuid:e74486f4-52b0-44b6-b829-156810fae20d
// Content-Type: application/xop+xml; charset=UTF-8; type="application/soap+xml"
// Content-Transfer-Encoding: binary
// Content-ID: <root.message@cxf.apache.org>
// 
// <soap:Envelope xmlns:soap="http://www.w3.org/2003/05/soap-envelope"><soap:Body> ... </soap:Body></soap:Envelope>
// --uuid:e74486f4-52b0-44b6-b829-156810fae20d
// Content-Type: image/jpeg
// Content-Transfer-Encoding: binary
// Content-ID: <beee83b7-166c-494c-890a-def990e9887b-1496@cxf.apache.org>
// Content-Disposition: attachment;name="-2049913191"
// 
// BINARY DATA HERE...
// 
// --uuid:e74486f4-52b0-44b6-b829-156810fae20d
// Content-Type: image/gif
// Content-Transfer-Encoding: binary
// Content-ID: <beee83b7-166c-494c-890a-def990e9887b-1497@cxf.apache.org>
// Content-Disposition: attachment;name="-2049913188"
// 
// BINARY DATA HERE...
// 
// --uuid:e74486f4-52b0-44b6-b829-156810fae20d
// Content-Type: image/gif
// Content-Transfer-Encoding: binary
// Content-ID: <beee83b7-166c-494c-890a-def990e9887b-1498@cxf.apache.org>
// Content-Disposition: attachment;name="-2049913185"
// 
// BINARY DATA HERE...
// 
// --uuid:e74486f4-52b0-44b6-b829-156810fae20d--

// Get the number of MIME sub-parts.
int numParts = [mime.NumParts intValue];

// The 1st part at index 0 is the application/xop+xml.  We're just going to extract the JPG and GIF image files..
CkoStringBuilder *sbFilename = [[CkoStringBuilder alloc] init];
NSString *name = 0;
int i = 1;
while (i < numParts) {
    CkoMime *mp = [mime GetPart: [NSNumber numberWithInt: i]];

    // By looking at the MIME above, the "name" attribute of the Content-Disposition header field seems
    // to be the only possible name we can use for each image..
    [sbFilename Append: @"qa_output/"];
    name = [mp GetHeaderFieldAttribute: @"Content-Disposition" attrName: @"name"];
    [sbFilename Append: name];
    [sbFilename Append: @"."];
    [sbFilename Append: mp.ContentType];
    int numReplaced = [[sbFilename Replace: @"image/" replacement: @""] intValue];
    [mp SaveBody: [sbFilename GetAsString]];
    NSLog(@"%@%@",@"output file: ",[sbFilename GetAsString]);

    [sbFilename Clear];
    i = i + 1;
}

NSLog(@"%@",@"Success.");