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Merge pull request SDWebImage#876 from matias-pequeno/custom_operations
Allows user to override default SDWebImageDownloaderOperation
2 parents a4c213e + 3671cdd commit 125515d

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2 files changed

+44
-28
lines changed

2 files changed

+44
-28
lines changed

‎SDWebImage/SDWebImageDownloader.h

Lines changed: 10 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -139,6 +139,16 @@ typedef NSDictionary *(^SDWebImageDownloaderHeadersFilterBlock)(NSURL *url, NSDi
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*/
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- (NSString *)valueForHTTPHeaderField:(NSString *)field;
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/**
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* Sets a subclass of `SDWebImageDownloaderOperation` as the default
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* `NSOperation` to be used each time SDWebImage constructs a request
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* operation to download an image.
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*
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* @param operationClass The subclass of `SDWebImageDownloaderOperation` to set
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* as default. Passing `nil` will revert to `SDWebImageDownloaderOperation`.
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*/
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- (void)setOperationClass:(Class)operationClass;
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/**
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* Creates a SDWebImageDownloader async downloader instance with a given URL
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*

‎SDWebImage/SDWebImageDownloader.m

Lines changed: 34 additions & 28 deletions
Original file line numberDiff line numberDiff line change
@@ -20,6 +20,7 @@ @interface SDWebImageDownloader ()
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@property (strong, nonatomic) NSOperationQueue *downloadQueue;
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@property (weak, nonatomic) NSOperation *lastAddedOperation;
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@property (assign, nonatomic) Class operationClass;
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@property (strong, nonatomic) NSMutableDictionary *URLCallbacks;
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@property (strong, nonatomic) NSMutableDictionary *HTTPHeaders;
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// This queue is used to serialize the handling of the network responses of all the download operation in a single queue
@@ -63,6 +64,7 @@ + (SDWebImageDownloader *)sharedDownloader {
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- (id)init {
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if ((self = [super init])) {
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_operationClass = [SDWebImageDownloaderOperation class];
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_executionOrder = SDWebImageDownloaderFIFOExecutionOrder;
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_downloadQueue = [NSOperationQueue new];
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_downloadQueue.maxConcurrentOperationCount = 2;
@@ -104,6 +106,10 @@ - (NSInteger)maxConcurrentDownloads {
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return _downloadQueue.maxConcurrentOperationCount;
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}
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- (void)setOperationClass:(Class)operationClass {
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_operationClass = operationClass ?: [SDWebImageDownloaderOperation class];
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}
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- (id <SDWebImageOperation>)downloadImageWithURL:(NSURL *)url options:(SDWebImageDownloaderOptions)options progress:(SDWebImageDownloaderProgressBlock)progressBlock completed:(SDWebImageDownloaderCompletedBlock)completedBlock {
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__block SDWebImageDownloaderOperation *operation;
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__weak SDWebImageDownloader *wself = self;
@@ -124,34 +130,34 @@ - (NSInteger)maxConcurrentDownloads {
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else {
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request.allHTTPHeaderFields = wself.HTTPHeaders;
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}
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operation = [[SDWebImageDownloaderOperation alloc] initWithRequest:request
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options:options
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progress:^(NSInteger receivedSize, NSInteger expectedSize) {
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SDWebImageDownloader *sself = wself;
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if (!sself) return;
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NSArray *callbacksForURL = [sself callbacksForURL:url];
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for (NSDictionary *callbacks in callbacksForURL) {
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SDWebImageDownloaderProgressBlock callback = callbacks[kProgressCallbackKey];
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if (callback) callback(receivedSize, expectedSize);
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}
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}
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completed:^(UIImage *image, NSData *data, NSError *error, BOOL finished) {
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SDWebImageDownloader *sself = wself;
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if (!sself) return;
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NSArray *callbacksForURL = [sself callbacksForURL:url];
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if (finished) {
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[sself removeCallbacksForURL:url];
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}
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for (NSDictionary *callbacks in callbacksForURL) {
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SDWebImageDownloaderCompletedBlock callback = callbacks[kCompletedCallbackKey];
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if (callback) callback(image, data, error, finished);
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}
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}
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cancelled:^{
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SDWebImageDownloader *sself = wself;
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if (!sself) return;
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[sself removeCallbacksForURL:url];
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}];
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operation = [[wself.operationClass alloc] initWithRequest:request
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options:options
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progress:^(NSInteger receivedSize, NSInteger expectedSize) {
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SDWebImageDownloader *sself = wself;
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if (!sself) return;
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NSArray *callbacksForURL = [sself callbacksForURL:url];
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for (NSDictionary *callbacks in callbacksForURL) {
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SDWebImageDownloaderProgressBlock callback = callbacks[kProgressCallbackKey];
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if (callback) callback(receivedSize, expectedSize);
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}
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}
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completed:^(UIImage *image, NSData *data, NSError *error, BOOL finished) {
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SDWebImageDownloader *sself = wself;
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if (!sself) return;
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NSArray *callbacksForURL = [sself callbacksForURL:url];
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if (finished) {
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[sself removeCallbacksForURL:url];
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}
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for (NSDictionary *callbacks in callbacksForURL) {
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SDWebImageDownloaderCompletedBlock callback = callbacks[kCompletedCallbackKey];
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if (callback) callback(image, data, error, finished);
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}
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}
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cancelled:^{
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SDWebImageDownloader *sself = wself;
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if (!sself) return;
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[sself removeCallbacksForURL:url];
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}];
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if (wself.username && wself.password) {
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operation.credential = [NSURLCredential credentialWithUser:wself.username password:wself.password persistence:NSURLCredentialPersistenceForSession];

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