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POData corrupt after converting byte[] to NSData
 

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  1. POData corrupt after converting byte[] to NSData
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    <p>I have .Net web service response containing a byte[] entry, among other fields. The data is a PDF file.</p> <p>I extract the Dictionary from the received data with: [NSJSONSerialization JSONObjectWithData]</p> <p>Hereafter I use the following code to convert the byte[] to NSData. I then save the result to disk (see last line).</p> <p>When opening the resulting PDF file, I get the following error:</p> <p><strong>"failed to find PDF header: `%PDF' not found."</strong></p> <pre><code> NSArray *byteArray = [rootDictionary objectForKey:@"file"]; unsigned c = byteArray.count; uint8_t *bytes = malloc(sizeof(*bytes) * c); unsigned i; for (i = 0; i &lt; c; i++) { NSString *str = [byteArray objectAtIndex:i]; int byte = [str intValue]; bytes[i] = (uint8_t)byte; } NSData* data = [NSData dataWithBytes:(const void *)byteArray length:sizeof(unsigned char)*c]; //Save to disk using svc class. NSString *localPath = [svc saveReport:data ToFile:[rootDictionary objectForKey:@"name"]]; </code></pre> <p>I also tried converting the byte[] to a base64 NSString (on the service side) and then back to NSData in my app, which worked (**mostly) but I was told that it's sloppy code.</p> <p>** When pulling multiple PDF asynchronously at the same time, some of these reports received as base64 strings were also corrupted.</p> <p>PS. Please let me know if I must supply the code from my svc class as well, but I don't think the problem is there.</p> <p><strong>Edit:</strong> I created a new web service method which takes a byte[] as input, then modified my iOS app to send the byteArray variable back to the service, where it get's saved to a file. The resulting PDF file is a valid file readable by Adobe. Meaning there is no corruption during transfer.</p> <p>Thank you!</p>
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    1. USMatthys Du Toit
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    1. COAs a side note, I confirmed that the file on the server side is exactly the same size as the resulting NSData. Also, that the file on the server is a valid PDF which opens successfully in Adobe.
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      1. USMatthys Du Toit
 

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