AFNetworking Download Redirect - ios

Question

I am trying to download a file using AFNetworking and the download gets redirected to Amazons Web Services. I can see the redirect but it never seems to pick up the download so I was wondering what I'm doing wrong! Here's my code:
NSString *urlString = [[NSString alloc]initWithFormat:#"%#?%#=%#", update.downloadUrl.absoluteString, #"auth_token", database.userAuthToken];
NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:urlString] cachePolicy:NSURLRequestReturnCacheDataElseLoad timeoutInterval:30.0];
AFHTTPRequestOperation *operation = [[AFHTTPRequestOperation alloc] initWithRequest:request];
[operation setRedirectResponseBlock:^NSURLRequest *(NSURLConnection *connection, NSURLRequest *request, NSURLResponse *redirectResponse) {
NSLog(#"Response: %#", redirectResponse.debugDescription);
NSLog(#"Request: %#", request.debugDescription);
if(redirectResponse == nil) return request;
NSMutableURLRequest *urlRequest = [httpClient requestWithMethod:#"GET" path:request.URL.absoluteString parameters:nil];
return urlRequest;
}];
[operation setOutputStream:[NSOutputStream outputStreamToFileAtPath:[item.downloadUrl absoluteString] append:false]];
[operation setDownloadProgressBlock:^(NSUInteger bytesRead, long long totalBytesRead, long long totalBytesExpectedToRead) {
[_currentItem setUpdateProgress:totalBytesRead / (float)totalBytesExpectedToRead];
NSLog(#"BytesRead: %i, TotalBytesRead: %lld, BytesToRead: %lld", bytesRead, totalBytesRead, totalBytesExpectedToRead);
}];
[operation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) {
[self networkQueueComplete:operation withResponse:responseObject];
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
[self networkQueueFailed:operation withError:error];
}];
[networkQueue addOperation:operation];
In the setRedirectResponse block I can see the right redirect url, but my setDownloadProgress block never gets called.

Answer 1

I add a redirect page on my server,and run your code. I found that if return request directly in setRedirectResponseBlock:, the redirect download work well,setDownloadProgress block gets called.
[operation setRedirectResponseBlock:^NSURLRequest *(NSURLConnection *connection, NSURLRequest *request, NSURLResponse *redirectResponse) {
NSLog(#"Response: %#", redirectResponse.debugDescription);
NSLog(#"Request: %#", request.debugDescription);
return request;
}];
UPDATE:
My test redirect page:http://joiningsstest.byethost11.com/redirect.php
you can pass your redirect url with "url" parameter in http/get.
I’m not sure if your s3 url need authorize for access.In my test code,i used "http://still.s3.amazonaws.com/Material/Chimney/images/1.jpg" for redirect,this is a public s3 url.
Redirect page's code:
<?php
if($_GET['url'])
{
header('HTTP/1.1 302 Moved Permanently');
header('Location:'.$_GET['url']);
}
?>
My test code:
NSString * redirectURL = #"http://still.s3.amazonaws.com/Material/Chimney/images/1.jpg";
NSString * testURL = [NSString stringWithFormat:#"http://joiningsstest.byethost11.com/redirect.php?url=%#",redirectURL];
NSURLRequest * originalRequest = [NSURLRequest requestWithURL:[NSURL URLWithString:testURL] cachePolicy:NSURLRequestReturnCacheDataElseLoad timeoutInterval:30.0];
AFHTTPRequestOperation *operation = [[AFHTTPRequestOperation alloc] initWithRequest:originalRequest];
[operation setRedirectResponseBlock:^NSURLRequest *(NSURLConnection *connection, NSURLRequest *request, NSURLResponse *redirectResponse) {
NSLog(#"Response: %#", redirectResponse.debugDescription);
NSLog(#"Request: %#", request.debugDescription);
return request;
}];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *path = [[paths objectAtIndex:0] stringByAppendingPathComponent:#"1.jpg"];
[operation setOutputStream:[NSOutputStream outputStreamToFileAtPath:path append:false]];
[operation setDownloadProgressBlock:^(NSUInteger bytesRead, long long totalBytesRead, long long totalBytesExpectedToRead) {
NSLog(#"BytesRead: %i, TotalBytesRead: %lld, BytesToRead: %lld", bytesRead, totalBytesRead, totalBytesExpectedToRead);
}];
[operation start];