ASIHTTPRequest set Download Destination Path failing - ios

Question

I have a method which looks for a certain pdf, if it doesn't find it locally it uses ASIHTTPRequest to download it asynchronously. However the request always fails when the line:
[request setDownloadDestinationPath:currentDetailItem];
is uncommented, the request starts and the progress increases until 100% then the request failed block is executed.
These are the relevant NSLogs when the request fails:
2012-08-16 12:08:34.398 XXXX[1675:707] Request started with url :http://XXXX.com/gwas/sites/default/files/Responding%20to%20Severe%20Weather%20Events.pdf
filePath :/var/mobile/Applications/322C24CF-9664-403D-9CC5-13C396F39F84/Documents/Responding%20to%20Severe%20Weather%20Events.pdf
2012-08-16 12:08:39.018 XXXX[1675:707] Request failed:HTTP/1.1 200 OK
Here is the code for the method:
- (void)setDetailItem:(NSString *)newDetailItem {
NSArray *downloadPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSArray *components = [newDetailItem componentsSeparatedByString:#"/"];
NSString *filePath = [[downloadPaths objectAtIndex:0] stringByAppendingFormat:#"/%#", [components lastObject]];
currentDetailItem = filePath;
if (![self fileExistsLocally:[components lastObject]]) {
//Download the file
[self displayProgressView];
ASIHTTPRequest *request = [ASIHTTPRequest requestWithURL:[NSURL URLWithString:newDetailItem]];
[request setDownloadDestinationPath:currentDetailItem];
[request setDownloadProgressDelegate:progressBar];
[request setCompletionBlock:^
{
[self showPdf:currentDetailItem];
[self hideProgressView];
NSLog(#"%f, Request finished :%#", progressBar.progress, request.responseStatusMessage);
}];
[request setFailedBlock:^
{
NSLog(#"Request failed:%#", request.responseStatusMessage);
[self hideProgressView];
[SVProgressHUD showErrorWithStatus:#"Request failed"];
}];
[request startAsynchronous];
NSLog(#"Request started with url :%#\nfilePath :%#", newDetailItem, currentDetailItem);
}
else {
[self showPdf:currentDetailItem];
}
}
If I comment the line [request setDownloadDestinationPath:currentDetailItem]; out, the request is successful. Any ideas? thanks!

Answer 1

For anyone who is interested, I fixed the problem by swapping over to NSURLConnection, here's the code:
- (void)setDetailItem:(NSString *)newDetailItem {
NSArray *downloadPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSArray *components = [newDetailItem componentsSeparatedByString:#"/"];
NSString *filePath = [[downloadPaths objectAtIndex:0] stringByAppendingFormat:#"/%#", [components lastObject]];
currentDetailItem = filePath;
if (![self fileExistsLocally:[components lastObject]]) {
[self displayProgressView];
data_ = [[NSMutableData alloc] init];
NSURLRequest *urlRequest = [NSURLRequest requestWithURL:[NSURL URLWithString:newDetailItem] cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:60.0];
NSURLConnection *connection = [[NSURLConnection alloc] initWithRequest:urlRequest delegate:self startImmediately:YES];
if (!connection) {
[SVProgressHUD showErrorWithStatus:#"Request failed"];
return;
}
else {
data_ = [[NSMutableData alloc] init];
}
}
else {
[self showPdf:currentDetailItem];
}
}
#pragma mark NSURLConnectionDelegate methods
- (void)connection: (NSURLConnection*) connection didReceiveResponse: (NSHTTPURLResponse*) response
{
if ([response statusCode] == 200) {
currentDownloadSize = [response expectedContentLength];
}
[data_ setLength:0];
}
- (void) connection: (NSURLConnection*) connection didReceiveData: (NSData*) data
{
[data_ appendData:data];
progressBar.progress = ((float) [data_ length] / (float) currentDownloadSize);
}
- (void)connectionDidFinishLoading:(NSURLConnection *)connection
{
//Save file locally
NSURL *url = [NSURL fileURLWithPath:currentDetailItem];
NSError *error = nil;
[data_ writeToURL:url options:0 error:&error];
if (error) {
NSLog(#"Write failed with error:%#", error);
}
else {
NSLog(#"Request successful");
[self showPdf:currentDetailItem];
}
[self hideProgressView];
}
- (void)connection:(NSURLConnection *)connection
didFailWithError:(NSError *)error
{
[self hideProgressView];
[SVProgressHUD showErrorWithStatus:#"Request failed"];
NSLog(#"Connection failed! Error - %# %#",
[error localizedDescription],
[[error userInfo] objectForKey:NSURLErrorFailingURLStringErrorKey]);
}