How to download file to iphone coming as byte array? - ios

Question

below code i use an asmx webservice to get a file as byte array and want to save it to iphone application's documents directory
the file i request is a sqlite file
and my code is :
-(void)getfile{
NSString* soapMessage = [NSString stringWithFormat:
#"<?xml version=\"1.0\" encoding=\"utf-8\"?><soap:Envelope xmlns:xsi=\"http://w3.org/2001/XMLSchema-instance\" xmlns:xsd=\"http://w3.org/2001/XMLSchema\" xmlns:soap=\"http://schemas.xmlsoap.org/soap/envelope/\"> <soap:Body> <GetDocument xmlns=\"http://tempuri.org\"> <DocumentName>%#</DocumentName> </GetDocument></soap:Body> </soap:Envelope>", #"ErtugrulGuler"];
NSURL* theUrl = [NSURL URLWithString:#"http://test.xxxx.com/xxxxx/xxxx.asmx"];
NSString* msgLength = [NSString stringWithFormat:#"%d", [soapMessage length]];
NSMutableURLRequest* theRequest = [NSMutableURLRequest requestWithURL:theUrl];
[theRequest addValue:#"text/xml; charset=utf-8" forHTTPHeaderField:#"Content-Type"];
[theRequest addValue:#"http://tempuri.org/GetDocument" forHTTPHeaderField:#"SOAPAction"];
[theRequest setHTTPMethod:#"POST"];
[theRequest addValue:msgLength forHTTPHeaderField:#"Content-Length"];
[theRequest setHTTPBody: [soapMessage dataUsingEncoding:NSUTF8StringEncoding]];
NSURLConnection *connect = [[NSURLConnection alloc] initWithRequest: theRequest delegate:self];
if (connect)
{
}
else {
NSLog(#"No Connection established");
}
}
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response {
// A response has been received, this is where we initialize the instance var you created
// so that we can append data to it in the didReceiveData method
// Furthermore, this method is called each time there is a redirect so reinitializing it
// also serves to clear it
downloadData = [[NSMutableData alloc] init];
}
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {
// Append the new data to the instance variable you declared
[downloadData appendData:data];
NSString *receivedDataString = [[NSString alloc] initWithData:downloadData encoding:NSUTF8StringEncoding];
NSLog(#"data string: %#",receivedDataString);
NSLog(#"data length: %d",[data length]);
//NSLog(#"bytesWritten == %d error == %#",bytesWritten,[fileOutputStream streamError]);
}
- (void)connectionDidFinishLoading:(NSURLConnection *)connection {
// The request is complete and data has been received
// You can parse the stuff in your instance variable now
//NSLog(#"finish loading");
[self performSelector:#selector(downloadData:) withObject:downloadData afterDelay:0];
}
- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error {
// The request has failed for some reason!
// Check the error var
}
-(void)downloadData:(NSData*)response
{
//NSLog(#" \n\n STRING = %# \n\n ",[[NSString alloc]initWithData:response encoding:NSUTF8StringEncoding]);
NSArray *paths=NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentDir=[paths objectAtIndex:0];
NSString *documentFile=[documentDir stringByAppendingPathComponent:#"abc.sqlite"];
NSString * yourAppendingText=[[NSString alloc]initWithData:response encoding:NSUTF8StringEncoding];
[yourAppendingText writeToFile:documentFile atomically:YES encoding:NSUTF8StringEncoding error:nil];
}
and this is my webservice method that returns byte array
[WebMethod]
public Byte[] GetDocument(string DocumentName)
{
string strdocPath;
strdocPath = "path" + DocumentName;
FileStream objfilestream = new FileStream(strdocPath,FileMode.Open,FileAccess.Read);
int len = (int)objfilestream.Length;
Byte[] documentcontents = new Byte[len];
objfilestream.Read(documentcontents,0,len);
objfilestream.Close();
return documentcontents;
}
this code connects successfully but i dont know how to get file with NSData and write the file to Documents Directory as .sqlite
#EDIT:
i solve something but the file i wanted to get is 53kb and my recieved data as string like :
<?xml version="1.0" encoding="utf-8"?><soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"><soap:Body><GetDocumentResponse xmlns="http://tempuri.org/" /></soap:Body></soap:Envelope>
and data length : 297 so it cannot get the data i think
in asp.net i run the service and get data successfully. so there is no problem with service but maybe maxiimumrecieving size for ios could be increased? but how?

Answer 1

NSOutputStream *fileOutputStream;
NSString *databasePath = [NSString stringWithFormat:#"%#/Documents/%#",NSHomeDirectory(),#"database.sqlite"];
fileOutputStream = nil;
fileOutputStream = [[NSOutputStream alloc] initToFileAtPath:databasePath append:NO];
[fileOutputStream open];
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data{
int bytesWritten = [fileOutputStream write:[data bytes] maxLength:[data length]];
NSLog(#" %s bytesWritten == %d error == %#",__FUNCTION__,bytesWritten,[fileOutputStream streamError]);
}