iPhone: How to Embed NSData in XML for Upload to Server?

Question

Hello,

I want to pass data to a server and store the file there in a database as binary data.

NSData *myData = [NSData dataWithContentsOfFile:pathDoc]; 
pathDoc = [NSString stringWithFormat:@"<size>%d</size><type>%d</type><cdate>%@</cdate><file>%c</file><fname>File</fname>",fileSizeVal,filetype,creationDate,myData];

Any idea about this?

Thanks you, Milan

Answer 1

you should be able to use object archiving to create a serialized object and then send that to the server.

Answer 2

This code makes no sense.

You create a NSData object with a path to a file then you turn around and reassign to the path var a string representing a chunk of XML. It's very muddled and likely to cause errors. Don't reuse variables this way.

In any case, to encode data to a string you use NSString's:

- (id)initWithData:(NSData *)data encoding:(NSStringEncoding)encoding

Then just insert that string wherever you want it.

Edit:

Hello, sorry for i dont know how to use this - (id)initWithData:(NSData *)data encoding:(NSStringEncoding)encoding in my code.

Like so: (Sorry about the formatting Stackoverflow's editor seems to be on blink today)

NSData *myData = [NSData dataWithContentsOfFile:pathDoc]; 
NSString *myDataString = [[NSString alloc] initWithData:myData encoding:NSUnicodeStringEncoding];
NSString *formatString = @"<size>%d</size><type>%d</type><cdate>%@</cdate><file>%c</file><fname>File</fname><data>%@</data>";
pathDoc = [NSString stringWithFormat:formatString,fileSizeVal,filetype,creationDate,myDataString];

The NSUnicodeStringEncoding is one of several constants defining a variety of string encodings. See the NSString class reference. Which one you use depends on what your server expects.

Good luck.

Answer 3

The most common way to embed binary data in an XML document is to encode the data to ASCII. For example using Base64.

Answer 4

Hello,

i have one pdf,doc file i want to get pdf data ane insert in mysql using webservice

NSFileManager fileManager = [NSFileManager defaultManager]; NSError error = nil; NSString *pathDoc = [[NSBundle mainBundle] pathForResource:@"File" ofType:@"docx"];

NSData *myData = [NSData dataWithContentsOfFile:pathDoc];

NSString *soapMessage = [NSString stringWithFormat: @"\n" " \n" "\n" "\n" "%@\n" "\n"
"\n" "\n",myData];

So how can i pass binary data using webservice

its urgent can anyone help me out. Thanks you