Add the convenient request/response modifier, which provide HTTP header directly, don't need to repeat the code

SDWebImage/Core/SDWebImageDownloaderRequestModifier.h

@@ -33,3 +33,24 @@ typedef NSURLRequest * _Nullable (^SDWebImageDownloaderRequestModifierBlock)(NSU
 + (nonnull instancetype)requestModifierWithBlock:(nonnull SDWebImageDownloaderRequestModifierBlock)block;
 
 @end
+
+/**
+ A convenient request modifier to provide the HTTP request including HTTP method, headers and body.
+ */
+@interface SDWebImageDownloaderHTTPRequestModifier : NSObject <SDWebImageDownloaderRequestModifier>
+
+/// Create the request modifier with HTTP Method, Headers and Body
+/// @param method HTTP Method, nil means to GET.
+/// @param headers HTTP Headers. Case insensitive according to HTTP/1.1(HTTP/2) standard. The headers will overide the same fileds from original request.
+/// @param body HTTP Body
+/// @note This is for convenience, if you need code to control the logic, use `SDWebImageDownloaderRequestModifier` instead
+- (nonnull instancetype)initWithMethod:(nullable NSString *)method headers:(nullable NSDictionary<NSString *, NSString *> *)headers body:(nullable NSData *)body;
+
+/// Create the request modifier with HTTP Method, Headers and Body
+/// @param method HTTP Method, nil means to GET.
+/// @param headers HTTP Headers. Case insensitive according to HTTP/1.1(HTTP/2) standard. The headers will overide the same fileds from SDWebImageDownloader global configuration.
+/// @param body HTTP Body
+/// @note This is for convenience, if you need code to control the logic, use `SDWebImageDownloaderRequestModifier` instead
++ (nonnull instancetype)requestModifierWithMethod:(nullable NSString *)method headers:(nullable NSDictionary<NSString *, NSString *> *)headers body:(nullable NSData *)body;
+
+@end

SDWebImage/Core/SDWebImageDownloaderRequestModifier.m

@@ -37,3 +37,41 @@
 }
 
 @end
+
+@interface SDWebImageDownloaderHTTPRequestModifier ()
+
+@property (nonatomic, copy, nullable) NSString *method;
+@property (nonatomic, copy, nullable) NSDictionary<NSString *,NSString *> *headers;
+@property (nonatomic, copy, nullable) NSData *body;
+
+@end
+
+@implementation SDWebImageDownloaderHTTPRequestModifier
+
+- (instancetype)initWithMethod:(NSString *)method headers:(NSDictionary<NSString *,NSString *> *)headers body:(NSData *)body {
+    self = [super init];
+    if (self) {
+        _method = [method copy];
+        _headers = [headers copy];
+        _body = [body copy];
+    }
+    return self;
+}
+
++ (instancetype)requestModifierWithMethod:(NSString *)method headers:(NSDictionary<NSString *,NSString *> *)headers body:(NSData *)body {
+    SDWebImageDownloaderHTTPRequestModifier *requestModifier = [[SDWebImageDownloaderHTTPRequestModifier alloc] initWithMethod:method headers:headers body:body];
+    return requestModifier;
+}
+
+- (NSURLRequest *)modifiedRequestWithRequest:(NSURLRequest *)request {
+    NSMutableURLRequest *mutableRequest = [request mutableCopy];
+    mutableRequest.HTTPMethod = self.method;
+    mutableRequest.HTTPBody = self.body;
+    for (NSString *header in self.headers) {
+        NSString *value = self.headers[header];
+        [mutableRequest setValue:value forHTTPHeaderField:header];
+    }
+    return [mutableRequest copy];
+}
+
+@end

SDWebImage/Core/SDWebImageDownloaderResponseModifier.h

@@ -33,3 +33,24 @@ typedef NSURLResponse * _Nullable (^SDWebImageDownloaderResponseModifierBlock)(N
 + (nonnull instancetype)responseModifierWithBlock:(nonnull SDWebImageDownloaderResponseModifierBlock)block;
 
 @end
+
+/**
+ A convenient response modifier to provide the HTTP response including HTTP method, headers and body.
+ */
+@interface SDWebImageDownloaderHTTPResponseModifier : NSObject <SDWebImageDownloaderResponseModifier>
+
+/// Create the response modifier with HTTP Version, Status Code and Headers
+/// @param version HTTP Version, nil means "HTTP/1.1"
+/// @param statusCode HTTP Status Code
+/// @param headers HTTP Headers. Case insensitive according to HTTP/1.1(HTTP/2) standard. The headers will overide the same fileds from original response.
+/// @note This is for convenience, if you need code to control the logic, use `SDWebImageDownloaderResponseModifier` instead
+- (nonnull instancetype)initWithVersion:(nullable NSString *)version statusCode:(NSInteger)statusCode headers:(nullable NSDictionary<NSString *, NSString *> *)headers;
+
+/// Create the response modifier with HTTP Version, Status Code and Headers
+/// @param version HTTP Version, nil means "HTTP/1.1". See available value in CFNetwork like `kCFHTTPVersion1_1`.
+/// @param statusCode HTTP Status Code
+/// @param headers HTTP Headers. Case insensitive according to HTTP/1.1(HTTP/2) standard. The headers will overide the same fileds from original response.
+/// @note This is for convenience, if you need code to control the logic, use `SDWebImageDownloaderResponseModifier` instead
++ (nonnull instancetype)responseModifierWithVersion:(nullable NSString *)version statusCode:(NSInteger)statusCode headers:(nullable NSDictionary<NSString *, NSString *> *)headers;
+
+@end

SDWebImage/Core/SDWebImageDownloaderResponseModifier.m

@@ -38,3 +38,43 @@
 }
 
 @end
+
+@interface SDWebImageDownloaderHTTPResponseModifier ()
+
+@property (nonatomic, copy, nullable) NSString *version;
+@property (nonatomic) NSInteger statusCode;
+@property (nonatomic, copy, nullable) NSDictionary<NSString *,NSString *> *headers;
+
+@end
+
+@implementation SDWebImageDownloaderHTTPResponseModifier
+
+- (instancetype)initWithVersion:(NSString *)version statusCode:(NSInteger)statusCode headers:(NSDictionary<NSString *,NSString *> *)headers {
+    self = [super init];
+    if (self) {
+        _version = [version copy];
+        _statusCode = statusCode;
+        _headers = [headers copy];
+    }
+    return self;
+}
+
++ (instancetype)responseModifierWithVersion:(NSString *)version statusCode:(NSInteger)statusCode headers:(NSDictionary<NSString *,NSString *> *)headers {
+    SDWebImageDownloaderHTTPResponseModifier *responseModifier = [[SDWebImageDownloaderHTTPResponseModifier alloc] initWithVersion:version statusCode:statusCode headers:headers];
+    return responseModifier;
+}
+
+- (NSURLResponse *)modifiedResponseWithResponse:(NSURLResponse *)response {
+    if (![response isKindOfClass:NSHTTPURLResponse.class]) {
+        return response;
+    }
+    NSMutableDictionary *mutableHeaders = [((NSHTTPURLResponse *)response).allHeaderFields mutableCopy];
+    for (NSString *header in self.headers) {
+        NSString *value = self.headers[header];
+        mutableHeaders[header] = value;
+    }
+    NSHTTPURLResponse *httpResponse = [[NSHTTPURLResponse alloc] initWithURL:response.URL statusCode:self.statusCode HTTPVersion:self.version ?: (__bridge NSString *)kCFHTTPVersion1_1 headerFields:[mutableHeaders copy]];
+    return httpResponse;
+}
+
+@end