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https://github.com/NohamR/Tweaks.git
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Add NetworkLogger utility
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156
NetworkLogger/Tweak.x
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156
NetworkLogger/Tweak.x
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#import <substrate.h>
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#import <Foundation/Foundation.h>
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#define LOG(fmt, ...) NSLog(@"[NetworkLogger] " fmt, ##__VA_ARGS__)
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#define MAX_BODY_LOG 2048
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#pragma mark - Helpers
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static int requestCount = 0;
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static NSString *timestamp(void) {
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static NSDateFormatter *fmt;
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static dispatch_once_t once;
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dispatch_once(&once, ^{
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fmt = [NSDateFormatter new];
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fmt.dateFormat = @"HH:mm:ss.SSS";
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});
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return [fmt stringFromDate:[NSDate date]];
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}
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static NSString *method(NSURLRequest *req) {
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return req.HTTPMethod.length ? req.HTTPMethod : @"GET";
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}
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static NSString *url(NSURLRequest *req) {
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return req.URL.absoluteString;
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}
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static NSString *formatHeaders(NSDictionary *hdrs) {
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if (!hdrs.count) return @"(none)";
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NSMutableString *s = [NSMutableString string];
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[hdrs enumerateKeysAndObjectsUsingBlock:^(NSString *k, NSString *v, BOOL *_) {
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[s appendFormat:@"\n %@: %@", k, v];
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}];
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return s.copy;
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}
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static NSString *formatBody(NSData *data) {
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if (!data.length) return @"(empty)";
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NSString *str = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
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if (str) return str.length > MAX_BODY_LOG ? [str substringToIndex:MAX_BODY_LOG] : str;
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return [NSString stringWithFormat:@"<binary %lu bytes>", (unsigned long)data.length];
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}
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static NSString *formatResponse(NSHTTPURLResponse *resp, NSData *body) {
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NSMutableString *s = [NSMutableString stringWithFormat:@"HTTP %ld", (long)resp.statusCode];
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[resp.allHeaderFields enumerateKeysAndObjectsUsingBlock:^(NSString *k, NSString *v, BOOL *_) {
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[s appendFormat:@"\n %@: %@", k, v];
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}];
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if (body) [s appendFormat:@"\n Body: %@", formatBody(body)];
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return s.copy;
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}
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static void logDataResponse(int num, NSURLRequest *req, NSData *data, NSURLResponse *resp, NSError *err) {
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if (err) {
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LOG(@"[%@] ◀ #%d %@ %@\n Error: %@", timestamp(), num, method(req), url(req), err.localizedDescription);
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} else if ([resp isKindOfClass:[NSHTTPURLResponse class]]) {
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LOG(@"[%@] ◀ #%d %@ %@\n%@", timestamp(), num, method(req), url(req), formatResponse((NSHTTPURLResponse *)resp, data));
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} else {
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LOG(@"[%@] ◀ #%d %@ %@\n (non-HTTP)", timestamp(), num, method(req), url(req));
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}
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}
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#define LOG_REQUEST(req, extra) \
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LOG(@"[%@] ▶ #%d %@ %@\n Headers:%@%@", timestamp(), ++requestCount, method(req), url(req), formatHeaders(req.allHTTPHeaderFields), extra)
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#define WRAP_DATA_HANDLER(orig, self, _cmd, req, handler, ...) \
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void (^wrapped)(NSData *, NSURLResponse *, NSError *) = ^(NSData *d, NSURLResponse *r, NSError *e) { \
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logDataResponse(requestCount, req, d, r, e); \
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if (handler) handler(d, r, e); \
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}; \
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return orig(self, _cmd, req, ##__VA_ARGS__, wrapped)
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#pragma mark - NSURLSession Hooks
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static NSURLSessionDataTask *(*orig_dataTaskReq)(NSURLSession *, SEL, NSURLRequest *, void (^)(NSData *, NSURLResponse *, NSError *));
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static NSURLSessionDataTask *hooked_dataTaskReq(NSURLSession *self, SEL _cmd, NSURLRequest *req, void (^handler)(NSData *, NSURLResponse *, NSError *)) {
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NSString *bodyLog = req.HTTPBody ? [NSString stringWithFormat:@"\n Body: %@", formatBody(req.HTTPBody)] : @"";
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LOG_REQUEST(req, bodyLog);
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WRAP_DATA_HANDLER(orig_dataTaskReq, self, _cmd, req, handler);
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}
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static NSURLSessionDataTask *(*orig_dataTaskURL)(NSURLSession *, SEL, NSURL *, void (^)(NSData *, NSURLResponse *, NSError *));
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static NSURLSessionDataTask *hooked_dataTaskURL(NSURLSession *self, SEL _cmd, NSURL *u, void (^handler)(NSData *, NSURLResponse *, NSError *)) {
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return hooked_dataTaskReq(self, _cmd, [NSURLRequest requestWithURL:u], handler);
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}
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static NSURLSessionUploadTask *(*orig_uploadTask)(NSURLSession *, SEL, NSURLRequest *, NSData *, void (^)(NSData *, NSURLResponse *, NSError *));
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static NSURLSessionUploadTask *hooked_uploadTask(NSURLSession *self, SEL _cmd, NSURLRequest *req, NSData *body, void (^handler)(NSData *, NSURLResponse *, NSError *)) {
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LOG_REQUEST(req, [NSString stringWithFormat:@"\n Body: %@", formatBody(body)]);
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WRAP_DATA_HANDLER(orig_uploadTask, self, _cmd, req, handler, body);
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}
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static NSURLSessionDownloadTask *(*orig_downloadTask)(NSURLSession *, SEL, NSURLRequest *, void (^)(NSURL *, NSURLResponse *, NSError *));
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static NSURLSessionDownloadTask *hooked_downloadTask(NSURLSession *self, SEL _cmd, NSURLRequest *req, void (^handler)(NSURL *, NSURLResponse *, NSError *)) {
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LOG_REQUEST(req, @"");
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int num = requestCount;
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void (^wrapped)(NSURL *, NSURLResponse *, NSError *) = ^(NSURL *loc, NSURLResponse *resp, NSError *err) {
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if (err) {
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LOG(@"[%@] ◀ #%d %@ %@\n Error: %@", timestamp(), num, method(req), url(req), err.localizedDescription);
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} else if ([resp isKindOfClass:[NSHTTPURLResponse class]]) {
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LOG(@"[%@] ◀ #%d %@ %@\n (saved to %@)\n%@", timestamp(), num, method(req), url(req), loc.path, formatResponse((NSHTTPURLResponse *)resp, nil));
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}
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if (handler) handler(loc, resp, err);
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};
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return orig_downloadTask(self, _cmd, req, wrapped);
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}
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static void (*orig_resume)(NSURLSessionTask *, SEL);
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static void hooked_resume(NSURLSessionTask *self, SEL _cmd) {
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LOG(@"[%@] ▶ RESUME %@ %@", timestamp(), method(self.currentRequest), url(self.currentRequest));
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orig_resume(self, _cmd);
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}
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#pragma mark - NSURLConnection (Legacy)
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static void (*orig_asyncSend)(NSURLConnection *, SEL, NSURLRequest *, NSOperationQueue *, void (^)(NSURLResponse *, NSData *, NSError *));
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static void hooked_asyncSend(NSURLConnection *self, SEL _cmd, NSURLRequest *req, NSOperationQueue *queue, void (^handler)(NSURLResponse *, NSData *, NSError *)) {
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LOG_REQUEST(req, @" (legacy)");
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void (^wrapped)(NSURLResponse *, NSData *, NSError *) = ^(NSURLResponse *r, NSData *d, NSError *e) {
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logDataResponse(requestCount, req, d, r, e);
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if (handler) handler(r, d, e);
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};
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orig_asyncSend(self, _cmd, req, queue, wrapped);
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}
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#pragma mark - Constructor
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#define HOOK_MSG(cls, sel, hook, orig) \
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MSHookMessageEx(cls, @selector(sel), (IMP)hook, (IMP *)&orig)
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%ctor {
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LOG(@"=== tweak loaded ===");
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Class session = NSClassFromString(@"NSURLSession");
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if (session) {
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HOOK_MSG(session, dataTaskWithRequest:completionHandler:, hooked_dataTaskReq, orig_dataTaskReq);
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HOOK_MSG(session, dataTaskWithURL:completionHandler:, hooked_dataTaskURL, orig_dataTaskURL);
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HOOK_MSG(session, uploadTaskWithRequest:fromData:completionHandler:, hooked_uploadTask, orig_uploadTask);
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HOOK_MSG(session, downloadTaskWithRequest:completionHandler:, hooked_downloadTask, orig_downloadTask);
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}
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Class task = NSClassFromString(@"__NSCFLocalDataTask") ?: NSClassFromString(@"NSURLSessionDataTask");
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if (task) HOOK_MSG(task, resume, hooked_resume, orig_resume);
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Class conn = NSClassFromString(@"NSURLConnection");
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if (conn) HOOK_MSG(conn, sendAsynchronousRequest:queue:completionHandler:, hooked_asyncSend, orig_asyncSend);
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LOG(@"=== all hooks installed ===");
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}
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