我搜索/搜索了很多但无法得到如何在UIWebview
中捕获HTTP响应标头的答案。假设我在App Launch上的UIWebview中重定向到用户注册网关(已经处于活动状态),当用户完成注册时,应该通过在HTTP响应标头中传回的注册时分配给用户的成功唯一ID来通知应用程序。
是否有使用UIWebview
捕获/打印HTTP响应标头的直接方法?
答案 0 :(得分:19)
无法从UIWebView
获取响应对象(提交苹果的错误,id说)
1)通过共享NSURLCache
- (void)viewDidAppear:(BOOL)animated {
NSURL *u = [NSURL URLWithString:@"http://www.google.de"];
NSURLRequest *r = [NSURLRequest requestWithURL:u];
[self.webView loadRequest:r];
}
- (void)webViewDidFinishLoad:(UIWebView *)webView {
NSCachedURLResponse *resp = [[NSURLCache sharedURLCache] cachedResponseForRequest:webView.request];
NSLog(@"%@",[(NSHTTPURLResponse*)resp.response allHeaderFields]);
}
@end
如果这对您有用,这是理想的
ELSE
UIWebView
:) 这是一个糟糕的解决方法! (正如理查德在评论中所指出的那样。)它有很大的缺点,你必须看看它是否是你案件中的有效解决方案
NSURL *u = [NSURL URLWithString:@"http://www.google.de"];
NSURLRequest *r = [NSURLRequest requestWithURL:u];
[NSURLConnection sendAsynchronousRequest:r queue:[NSOperationQueue mainQueue] completionHandler:^(NSURLResponse *resp, NSData *d, NSError *e) {
[self.webView loadData:d MIMEType:nil textEncodingName:nil baseURL:u];
NSLog(@"%@", [(NSHTTPURLResponse*)resp allHeaderFields]);
}];
答案 1 :(得分:8)
我喜欢objective-c运行时。你有什么想做但却没有API吗? DM; HR
好的,更严肃的说,这是解决方案。它将捕获从CFNetwork
发起的每个 URL响应,这是UIWebView碰巧在幕后使用的。它还将捕获AJAX请求,图像加载等。
为此添加过滤器可能就像对标题内容执行正则表达式一样简单。
@implementation NSURLResponse(webViewHack)
static IMP originalImp;
static char *rot13decode(const char *input)
{
static char output[100];
char *result = output;
// rot13 decode the string
while (*input) {
if (isalpha(*input))
{
int inputCase = isupper(*input) ? 'A' : 'a';
*result = (((*input - inputCase) + 13) % 26) + inputCase;
}
else {
*result = *input;
}
input++;
result++;
}
*result = '\0';
return output;
}
+(void) load {
SEL oldSel = sel_getUid(rot13decode("_vavgJvguPSHEYErfcbafr:"));
Method old = class_getInstanceMethod(self, oldSel);
Method new = class_getInstanceMethod(self, @selector(__initWithCFURLResponse:));
originalImp = method_getImplementation(old);
method_exchangeImplementations(old, new);
}
-(id) __initWithCFURLResponse:(void *) cf {
if ((self = originalImp(self, _cmd, cf))) {
printf("-[%s %s]: %s", class_getName([self class]), sel_getName(_cmd), [[[self URL] description] UTF8String]);
if ([self isKindOfClass:[NSHTTPURLResponse class]])
{
printf(" - %s", [[[(NSHTTPURLResponse *) self allHeaderFields] description] UTF8String]);
}
printf("\n");
}
return self;
}
@end
答案 2 :(得分:1)
如果你想要更高级别的@Richard J. Ross III编写的API代码,你需要继承NSURLProtocol。
NSURLProtocol
是处理URL请求的对象。因此,您可以将其用于在NSHipster和Ray Wenderlich上更好地描述的特定任务,其中包括从响应中获取HTTP标头的情况。
从NSURLProtocol创建一个新的子类,你的.h文件应如下所示:
@interface CustomURLProtocol : NSURLProtocol <NSURLConnectionDelegate>
@property (nonatomic, strong) NSURLConnection *connection;
@end
你的.m文件应该有这些方法来处理你想要的
@implementation CustomURLProtocol
+ (BOOL)canInitWithRequest:(NSURLRequest *)request {
// Here you can add custom filters to init or not specific requests
return YES;
}
+ (NSURLRequest *)canonicalRequestForRequest:(NSURLRequest *)request {
// Here you can modify your request
return request;
}
+ (BOOL)requestIsCacheEquivalent:(NSURLRequest *)a toRequest:(NSURLRequest *)b {
return [super requestIsCacheEquivalent:a toRequest:b];
}
- (void)startLoading {
// Start request
self.connection = [NSURLConnection connectionWithRequest:self.request delegate:self];
}
- (void) stopLoading {
[self.connection cancel];
self.connection = nil;
}
#pragma mark - Delegation
#pragma mark NSURLConnectionDelegate
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response {
if ([response isKindOfClass:[NSHTTPURLResponse class]]) {
NSHTTPURLResponse *httpResponse = (NSHTTPURLResponse *)response;
// Here we go with the headers
NSDictionary *allHeaderFields = [httpResponse allHeaderFields];
}
[self.client URLProtocol:self didReceiveResponse:response cacheStoragePolicy:NSURLCacheStorageNotAllowed];
}
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {
[self.client URLProtocol:self didLoadData:data];
}
- (void)connectionDidFinishLoading:(NSURLConnection *)connection {
[self.client URLProtocolDidFinishLoading:self];
}
- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error {
[self.client URLProtocol:self didFailWithError:error];
}
最后要做的是将此协议注册到加载系统,这在AppDelegate上很容易实现:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
[NSURLProtocol registerClass:[CustomURLProtocol class]];
return YES;
}
答案 3 :(得分:-1)
NSHTTPURLResponse
有类似
- (NSDictionary *)allHeaderFields
编辑:抱歉,我没有想到UIWebView
。如果您使用NSURLConnection
,我的解决方案就有效
但是,如果您使用NSURLConnection
向webview提供,那么您就有机会捕获连接,包括响应标头。