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(Objective-C) HTTP Download with Progress Event CallbacksDownloads a file via HTTP or HTTPS and uses event callbacks to monitor progress.
// This is the interface header httpProgress.h #import "CkoHttpProgress.h" @interface httpProgress : CkoHttpProgress { } - (void)AbortCheck: (BOOL *)abort; - (void)PercentDone: (NSNumber *)pctDone abort: (BOOL *)abort; - (void)ProgressInfo:(NSString *)pinfName value:(NSString *)pinfValue; @end // ---------------------------------------------------- #import <httpProgress.h> @implementation httpProgress - (void)AbortCheck: (BOOL *)abort { } - (void)PercentDone: (NSNumber *)pctDone abort: (BOOL *)abort { int percentDone = [pctDone intValue]; NSLog(@"%@%d",@"Percent Done: ",percentDone); // Explicitly abort at 25% or greater. // Remove this to allow for the HTTP download to run to completion. if (percentDone > 25) { *abort = YES; } } - (void)ProgressInfo:(NSString *)pinfName value:(NSString *)pinfValue { NSLog(@"%@%@%@",pinfName,@": ",pinfValue); } @end // ---------------------------------------------------- #import <CkoHttp.h> #import <NSString.h> // This example assumes the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. CkoHttp *http = [[CkoHttp alloc] init]; httpProgress *http_progress = [[httpProgress alloc] init]; [http setEventCallbackObject: http_progress]; // Set a heartbeat in milliseconds http.HeartbeatMs = [NSNumber numberWithInt:200]; // Download a file... NSString *localFilePath = @"qa_output/Python-3.4.4.tar.xz"; BOOL success = [http Download: @"https://www.python.org/ftp/python/3.4.4/Python-3.4.4.tar.xz" saveToPath: localFilePath]; if (success != YES) { NSLog(@"%@",http.LastErrorText); return; } NSLog(@"%@",@"OK!"); |
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