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POUpdating CakePHP web service with binary image data
 

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    <p>I have a web service (which uses CakePHP) that I am posting string data to successfully with a Mac OS X app I'm working on. </p> <p>Initially, I was given some advice that I would need to create a Base 64 encoded string to pass over a PNG imageto CakePHP. So my plan was to simply generate a URL encoded string (see code sample below). To do that, I've incorporated a third-party class which handles the base64 encode and decode. </p> <p>However, it seems like the CakePHP update() function is removing some characters from that base 64 encoded string:</p> <pre><code>Original string may contain something like: 5nd/9ne/+zuPelWPFYtGrRpde2tlK3eXwv/ But the one that is actually stored and eventually retrieved may be: 5nd/9ne/ zuPelWPFYtGrRpde2tlK3eXwv/ </code></pre> <p>Weird, right? I'm working on very limited knowledge of how CakePHP works, so I'm hoping this may be a simple answer. It seems like I should be able to post that base 64 encoded string to CakePHP - and that it should update without interpreting/removing any characters from the code. Any advice?</p> <p>Here is the code snippet of how I'm posting my values to the CakePHP web service:</p> <pre><code>- (void) updateApi { NSLog(@"Updating user account settings"); NSString* request_url = @"/users/update"; NSLog(@"%@", [NSString stringWithFormat:@"%@%@", @"http://somesite.com", request_url]); NSMutableURLRequest* request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:[NSString stringWithFormat:@"%@%@", @"http://somesite.com", request_url]]]; NSMutableString* post_values = [NSMutableString stringWithFormat:@"data[id]=%@", [[NSUserDefaults standardUserDefaults] objectForKey:@"user_id"]]; [post_values appendFormat:@"&amp;data[company]=%@", [company_field stringValue]]; [post_values appendFormat:@"&amp;data[phone]=%@", [phone_field stringValue]]; [post_values appendFormat:@"&amp;data[address1]=%@", [address1_field stringValue]]; [post_values appendFormat:@"&amp;data[address2]=%@", [address2_field stringValue]]; [post_values appendFormat:@"&amp;data[city]=%@", [city_field stringValue]]; [post_values appendFormat:@"&amp;data[state]=%@", [state_field stringValue]]; [post_values appendFormat:@"&amp;data[zip]=%@", [zip_field stringValue]]; [post_values appendFormat:@"&amp;data[website]=%@", [website_field stringValue]]; // Iteration 09 - Store logo as PNG and prepare to upload to server NSImage *logoImage = [logo_image image]; if (logoImage) { // Image exists; we need to convert it to a BLOB for our back-end database posting NSLog(@"Image exists in logo_image"); // Grab possible representations of this image NSArray *representations = [logoImage representations]; // Create the PNG data NSData *imageData = [NSBitmapImageRep representationOfImageRepsInArray:representations usingType:NSPNGFileType properties:nil]; // Base 64 encoding should happen here NSString *base64encodedImageData = [imageData base64Encoding]; // Convert to base 64 string NSLog(@"\n\nBase 64 image data encoded as \n\n%@\n\n", base64encodedImageData); // Store data in parameter [post_values appendFormat:@"&amp;data[logo_png_data]=%@", base64encodedImageData]; } NSString *encoded_post_values = [post_values stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]; NSLog(@"\n\nEncoded post values string is \n\n%@\n\n", encoded_post_values); NSData *request_data = [NSData dataWithBytes:[encoded_post_values UTF8String] length:[encoded_post_values length]]; [request setHTTPMethod:@"POST"]; [request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"content-type"]; [request setHTTPBody:request_data]; NSData* return_data = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil]; //NSLog(@"%@", [[NSString alloc] initWithData:return_data encoding:NSUTF8StringEncoding]); NSString* result = [[CJSONDeserializer deserializer] deserialize:return_data error:nil]; //NSLog(@"%@", result); </code></pre> <p>}</p>
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