Ios NSURLConnection sendAsynchronous:请求:队列:completionHandler和sendSynchronousRequest:returningResponse:错误:未工作
我已经创建了一个要swizzle的Ios NSURLConnection sendAsynchronous:请求:队列:completionHandler和sendSynchronousRequest:returningResponse:错误:未工作,ios,objective-c,nsurlconnection,objective-c-runtime,Ios,Objective C,Nsurlconnection,Objective C Runtime,我已经创建了一个要swizzle的NSURLConnection和NSURLSession类别,以便在运行时拦截呼叫并收集网络信息。 除了使用NSURLConnection sendAsynchronousRequest:queue:completionHandler: sendSynchronousRequest:returningResponse:error: 这两个静态方法在我的swizzling中并不遵循,在调试时,我看到方法实现交换与我的swizzling中的其他方法一样正常。 这是
NSURLConnection
和NSURLSession
类别,以便在运行时拦截呼叫并收集网络信息。
除了使用NSURLConnection
sendAsynchronousRequest:queue:completionHandler:
sendSynchronousRequest:returningResponse:error:
这两个静态方法在我的swizzling中并不遵循,在调试时,我看到方法实现交换与我的swizzling中的其他方法一样正常。
这是我的代码,类似于我对其他方法所做的,这些方法似乎工作得很好
typedef void (^SendAsynchronousCompletionHandlerBlock)(NSURLResponse*, NSData*, NSError*);
static void (*OriginalNSURLConnectionSendAsynchronousRequestQueueCompletionHandler)(id, SEL, NSURLRequest*, NSOperationQueue*, SendAsynchronousCompletionHandlerBlock);
static NSData* (*OriginalNSURLConnectionSendSynchronousRequestReturningResponseError)(id, SEL, NSURLRequest*, NSURLResponse**, NSError**);
static void MyNSURLConnectionSendAsynchronousRequestQueueCompletionHandler(id self, SEL _cmd, NSURLRequest* request, NSOperationQueue* queue, SendAsynchronousCompletionHandlerBlock completionHandler)
{
NSLog(@"Implementation Intercept in %s", __PRETTY_FUNCTION__);
OriginalNSURLConnectionSendAsynchronousRequestQueueCompletionHandler(self, _cmd, request, queue, completionHandler);
}
static NSData* MyNSURLConnectionSendSynchronousRequestReturningResponseError(id self, SEL _cmd, NSURLRequest* request, NSURLResponse** response, NSError** error)
{
NSLog(@"Implementation Intercept in %s", __PRETTY_FUNCTION__);
NSData* data = OriginalNSURLConnectionSendSynchronousRequestReturningResponseError(self, _cmd, request, response, error);
return data;
}
@implementation NSURLConnection (MyNSURLConnection)
+ (void) load
{
// Create onceToken
static dispatch_once_t onceToken;
// Use dispatch_once to make sure this runs only once in the lifecycle
dispatch_once(&onceToken,
^{
NSLog(@"Injecting code to NSURLConnection");
[self injectImplementationToNSURLConnectionSendAsynchronousRequestQueueCompletionHandler];
[self injectImplementationToNSURLConnectionSendSynchronousRequestReturningResponseError];
// Some other methods I intercept, just as reference, they work as tested to init an NSURLConnection object
// I will skip their implementation which is similar to what I show here
[self injectImplementationToNSURLConnectionConnectionWithRequestDelegate];
[self injectImplementationToNSURLConnectionInitWithRequestDelegateStartImmediately];
[self injectImplementationToNSURLConnectionInitWithRequestDelegate];
[self injectImplementationToNSURLConnectionStart];
});
}
+ (void) injectImplementationToNSURLConnectionSendAsynchronousRequestQueueCompletionHandler
{
// Replace the method on the same class that's used
// in the calling code
Class class = [NSURLConnection class];
// The Original +sendAsynchronousRequest:queue:completionHandler:
SEL originalSelector = @selector(sendAsynchronousRequest:queue:completionHandler:);
// The Replacement method implementation
IMP replacement = (IMP)MyNSURLConnectionSendAsynchronousRequestQueueCompletionHandler;
// This will eventually hold the original sendAsynchronousRequest:queue:completionHandler:
IMP* store = (IMP*)&OriginalNSURLConnectionSendAsynchronousRequestQueueCompletionHandler;
IMP originalImp = NULL;
Method method = class_getClassMethod(class, originalSelector);
if (method)
{
const char* type = method_getTypeEncoding(method);
// Replace the original method with the MyNSURLConnectionSendAsynchronousRequestQueueCompletionHandler
originalImp = class_replaceMethod(class, originalSelector, replacement, type);
if (!originalImp)
{
originalImp = method_getImplementation(method);
}
}
// Put the original method IMP into the pointer
if (originalImp && store)
{
*store = originalImp;
}
}
+ (void) injectImplementationToNSURLConnectionSendSynchronousRequestReturningResponseError
{
// Replace the method on the same class that's used
// in the calling code
Class class = [NSURLConnection class];
// The Original +sendSynchronousRequest:returningResponse:error: selector
SEL originalSelector = @selector(sendSynchronousRequest:returningResponse:error:);
// The Replacement method implementation
IMP replacement = (IMP)MyNSURLConnectionSendSynchronousRequestReturningResponseError;
// This will eventually hold the original sendSynchronousRequest:returningResponse:error:
IMP* store = (IMP*)&OriginalNSURLConnectionSendSynchronousRequestReturningResponseError;
IMP originalImp = NULL;
Method method = class_getClassMethod(class, originalSelector);
if (method)
{
const char* type = method_getTypeEncoding(method);
// Replace the original method with the MyNSURLConnectionSendSynchronousRequestReturningResponseError
originalImp = class_replaceMethod(class, originalSelector, replacement, type);
if (!originalImp)
{
originalImp = method_getImplementation(method);
}
}
// Put the original method IMP into the pointer
if (originalImp && store)
{
*store = originalImp;
}
}
那么,是什么使这些方法不同呢?我不能让我的代码快速转换到原始实现中,而且不会出现任何错误
下面是我测试它的代码:
- (IBAction) executeURLRequest: (UIButton*)sender
{
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:@"https://My.URL/file.json"]];
[request setValue:@"API_KEY" forHTTPHeaderField:@"X-My-Auth-Token"];
NSURLResponse* response;
NSError* error;
// Doesn't work, my swizzle method is not invoked
[NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];
// Doesn't work, my swizzle method is not invoked
[NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue currentQueue] completionHandler:
^(NSURLResponse *response, NSData *data, NSError *error)
{
if (error) NSLog(@"NSURLConnection failed: %@", [error debugDescription]);
NSLog(@"Made the NSURLRequest to My");
}];
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_LOW, 0),
^{
// It works, I get to see my message of the method invoked to the output console
NSURLConnection* connection = [[NSURLConnection alloc] initWithRequest:request delegate:nil startImmediately:YES];
});
}
我不知道,在我看来这很好……你怎么看?首先,不要在调试和/或学习目的之外使用系统框架方法。它是脆弱的,将突破操作系统的版本,并且在发现时不会批准或删除关闭系统框架的应用程序
其次,最有可能的情况是
NSURLConnection
实现为类集群。因此,可能有一些子类实现了实际的连接,而您正在滑动abstract super的实现,它什么也不做。首先,不要在调试和/或学习目的之外滑动系统框架方法。它是脆弱的,将突破操作系统的版本,并且在发现时不会批准或删除关闭系统框架的应用程序
其次,最有可能的情况是
NSURLConnection
实现为类集群。因此,可能存在实现实际连接的某个子类,而您正在滑动抽象超级的实现,而抽象超级的实现没有任何作用。尽管您需要特别小心滑动,但我不知道苹果有任何禁止滑动系统框架的政策。我自己也使用过这些类,SDK已经包含在应用商店的应用程序中
NSURLConnection未实现为类群集,尽管NSURLSession是
我编写了在Apigee iOS SDK中Swizzle NSURLConnection和NSURLSession的代码。在这里查看NSURLConnection swizzling的实现:
尽管你需要特别小心滑动,但我不知道苹果有任何禁止滑动系统框架的政策。我自己也使用过这些类,SDK已经包含在应用商店的应用程序中 NSURLConnection未实现为类群集,尽管NSURLSession是 我编写了在Apigee iOS SDK中Swizzle NSURLConnection和NSURLSession的代码。在这里查看NSURLConnection swizzling的实现:
这是我的代码,我可以快速切换(void)sendAsynchronousRequest:(NSURLRequest*)请求队列:(NSOperationQueue)队列完成处理程序:(void(^)(NSURLResponse,NSData*,NSError*)处理程序 我的测试代码
- (IBAction)clickSendAsyncWithBlock:(id)sender {
NSURL *URL = [NSURL URLWithString:@"http://localhost:8000/a.txt"];
NSURLRequest *request = [NSURLRequest requestWithURL:URL cachePolicy:NSURLRequestReloadIgnoringLocalCacheData timeoutInterval:60];
[NSURLConnection sendAsynchronousRequest:request
queue:[NSOperationQueue mainQueue]
completionHandler:^(NSURLResponse *response, NSData *data, NSError *error) {
NSString *myString = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
NSLog(@"got %@" , myString);
}];
}
结果:
- [双语新闻]我被抓到了
- 2014-06-17 10:31:29.103遥测扫描[3017:60b]得到一个
- (IBAction)clickSendAsyncWithBlock:(id)sender {
NSURL *URL = [NSURL URLWithString:@"http://localhost:8000/a.txt"];
NSURLRequest *request = [NSURLRequest requestWithURL:URL cachePolicy:NSURLRequestReloadIgnoringLocalCacheData timeoutInterval:60];
[NSURLConnection sendAsynchronousRequest:request
queue:[NSOperationQueue mainQueue]
completionHandler:^(NSURLResponse *response, NSData *data, NSError *error) {
NSString *myString = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
NSLog(@"got %@" , myString);
}];
}
结果:
- [双语新闻]我被抓到了
- 2014-06-17 10:31:29.103遥测扫描[3017:60b]得到一个