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//
// ASINetworkQueue.m
// asi-http-request
//
// Created by Ben Copsey on 07/11/2008.
// Copyright 2008 All-Seeing Interactive. All rights reserved.
//
#import "ASINetworkQueue.h"
#import "ASIHTTPRequest.h"
@implementation ASINetworkQueue
- (id)init
{
self = [super init];
delegate = NULL;
requestDidFinishSelector = NULL;
requestDidFailSelector = NULL;
queueDidFinishSelector = NULL;
shouldCancelAllRequestsOnFailure = YES;
uploadProgressDelegate = nil;
uploadProgressBytes = 0;
uploadProgressTotalBytes = 0;
downloadProgressDelegate = nil;
downloadProgressBytes = 0;
downloadProgressTotalBytes = 0;
requestsCount = 0;
showAccurateProgress = NO;
[self setMaxConcurrentOperationCount:4];
[self setSuspended:YES];
return self;
}
- (void)go
{
if (!showAccurateProgress) {
if (downloadProgressDelegate) {
[self incrementDownloadSizeBy:requestsCount];
}
if (uploadProgressDelegate) {
[self incrementUploadSizeBy:requestsCount];
}
}
[self setSuspended:NO];
}
- (void)cancelAllOperations
{
requestsCount = 0;
uploadProgressBytes = 0;
uploadProgressTotalBytes = 0;
downloadProgressBytes = 0;
downloadProgressTotalBytes = 0;
[super cancelAllOperations];
}
- (void)setUploadProgressDelegate:(id)newDelegate
{
uploadProgressDelegate = newDelegate;
// If the uploadProgressDelegate is an NSProgressIndicator, we set it's MaxValue to 1.0 so we can treat it similarly to UIProgressViews
SEL selector = @selector(setMaxValue:);
if ([uploadProgressDelegate respondsToSelector:selector]) {
double max = 1.0;
NSMethodSignature *signature = [[uploadProgressDelegate class] instanceMethodSignatureForSelector:selector];
NSInvocation *invocation = [NSInvocation invocationWithMethodSignature:signature];
[invocation setSelector:selector];
[invocation setArgument:&max atIndex:2];
[invocation invokeWithTarget:uploadProgressDelegate];
}
}
- (void)setDownloadProgressDelegate:(id)newDelegate
{
downloadProgressDelegate = newDelegate;
// If the downloadProgressDelegate is an NSProgressIndicator, we set it's MaxValue to 1.0 so we can treat it similarly to UIProgressViews
SEL selector = @selector(setMaxValue:);
if ([downloadProgressDelegate respondsToSelector:selector]) {
double max = 1.0;
NSMethodSignature *signature = [[downloadProgressDelegate class] instanceMethodSignatureForSelector:selector];
NSInvocation *invocation = [NSInvocation invocationWithMethodSignature:signature];
[invocation setSelector:@selector(setMaxValue:)];
[invocation setArgument:&max atIndex:2];
[invocation invokeWithTarget:downloadProgressDelegate];
}
}
- (void)addHEADOperation:(NSOperation *)operation
{
if ([operation isKindOfClass:[ASIHTTPRequest class]]) {
ASIHTTPRequest *request = (ASIHTTPRequest *)operation;
[request setRequestMethod:@"HEAD"];
[request setQueuePriority:10];
[request setShowAccurateProgress:YES];
if (uploadProgressDelegate) {
[request setUploadProgressDelegate:self];
} else {
[request setUploadProgressDelegate:NULL];
}
if (downloadProgressDelegate) {
[request setDownloadProgressDelegate:self];
} else {
[request setDownloadProgressDelegate:NULL];
}
[request setDelegate:self];
[super addOperation:request];
}
}
// Only add ASIHTTPRequests to this queue!!
- (void)addOperation:(NSOperation *)operation
{
if ([operation isKindOfClass:[ASIHTTPRequest class]]) {
requestsCount++;
ASIHTTPRequest *request = (ASIHTTPRequest *)operation;
if (showAccurateProgress) {
// If this is a GET request and we want accurate progress, perform a HEAD request first to get the content-length
if ([[request requestMethod] isEqualToString:@"GET"]) {
ASIHTTPRequest *HEADRequest = [[[ASIHTTPRequest alloc] initWithURL:[request url]] autorelease];
[HEADRequest setMainRequest:request];
[self addHEADOperation:HEADRequest];
//Tell the request not to reset the progress indicator when it gets a content-length, as we will get the length from the HEAD request
[request setShouldResetProgressIndicators:NO];
[request addDependency:HEADRequest];
// If we want to track uploading for this request accurately, we need to add the size of the post content to the total
} else if (uploadProgressDelegate) {
[request buildPostBody];
uploadProgressTotalBytes += [request postLength];
}
}
[request setShowAccurateProgress:showAccurateProgress];
if (uploadProgressDelegate) {
// For uploads requests, we always work out the total upload size before the queue starts, so we tell the request not to reset the progress indicator when starting each request
[request setShouldResetProgressIndicators:NO];
[request setUploadProgressDelegate:self];
} else {
[request setUploadProgressDelegate:NULL];
}
if (downloadProgressDelegate) {
[request setDownloadProgressDelegate:self];
} else {
[request setDownloadProgressDelegate:NULL];
}
[request setDelegate:self];
[request setDidFailSelector:@selector(requestDidFail:)];
[request setDidFinishSelector:@selector(requestDidFinish:)];
[super addOperation:request];
}
}
- (void)requestDidFail:(ASIHTTPRequest *)request
{
requestsCount--;
if (requestDidFailSelector) {
[delegate performSelector:requestDidFailSelector withObject:request];
}
if (shouldCancelAllRequestsOnFailure && requestsCount > 0) {
[self cancelAllOperations];
}
}
- (void)requestDidFinish:(ASIHTTPRequest *)request
{
requestsCount--;
if (requestDidFinishSelector) {
[delegate performSelector:requestDidFinishSelector withObject:request];
}
if (requestsCount == 0) {
if (queueDidFinishSelector) {
[delegate performSelector:queueDidFinishSelector withObject:self];
}
}
}
- (void)incrementUploadSizeBy:(unsigned long long)bytes
{
if (!uploadProgressDelegate) {
return;
}
uploadProgressTotalBytes += bytes;
[self incrementUploadProgressBy:0];
}
- (void)decrementUploadProgressBy:(unsigned long long)bytes
{
if (!uploadProgressDelegate || uploadProgressTotalBytes == 0) {
return;
}
uploadProgressBytes -= bytes;
double progress = (uploadProgressBytes*1.0)/(uploadProgressTotalBytes*1.0);
[ASIHTTPRequest setProgress:progress forProgressIndicator:uploadProgressDelegate];
}
- (void)incrementUploadProgressBy:(unsigned long long)bytes
{
if (!uploadProgressDelegate || uploadProgressTotalBytes == 0) {
return;
}
uploadProgressBytes += bytes;
double progress = (uploadProgressBytes*1.0)/(uploadProgressTotalBytes*1.0);
[ASIHTTPRequest setProgress:progress forProgressIndicator:uploadProgressDelegate];
}
- (void)incrementDownloadSizeBy:(unsigned long long)bytes
{
if (!downloadProgressDelegate) {
return;
}
downloadProgressTotalBytes += bytes;
[self incrementDownloadProgressBy:0];
}
- (void)incrementDownloadProgressBy:(unsigned long long)bytes
{
if (!downloadProgressDelegate || downloadProgressTotalBytes == 0) {
return;
}
downloadProgressBytes += bytes;
double progress = (downloadProgressBytes*1.0)/(downloadProgressTotalBytes*1.0);
[ASIHTTPRequest setProgress:progress forProgressIndicator:downloadProgressDelegate];
}
// Since this queue takes over as the delegate for all requests it contains, it should forward authorisation requests to its own delegate
- (void)authorizationNeededForRequest:(ASIHTTPRequest *)request
{
if ([delegate respondsToSelector:@selector(authorizationNeededForRequest:)]) {
[delegate performSelector:@selector(authorizationNeededForRequest:) withObject:request];
}
}
- (BOOL)respondsToSelector:(SEL)selector
{
if (selector == @selector(authorizationNeededForRequest:)) {
if ([delegate respondsToSelector:@selector(authorizationNeededForRequest:)]) {
return YES;
}
return NO;
}
return [super respondsToSelector:selector];
}
@synthesize uploadProgressDelegate;
@synthesize downloadProgressDelegate;
@synthesize requestDidFinishSelector;
@synthesize requestDidFailSelector;
@synthesize queueDidFinishSelector;
@synthesize shouldCancelAllRequestsOnFailure;
@synthesize delegate;
@synthesize showAccurateProgress;
@end
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