Download NSURLSession (proxy)

Source: Internet
Author: User

Download NSURLSession (proxy)
Download NSURLSession (proxy)

-(Void) downloadTask2
{

{
NSURLSessionConfiguration * cfg = [nsurlsessionconfigurationdefasessessionconfiguration];

// 1. Get the session object
NSURLSession * session = [NSURLSessionsessionWithConfiguration: includelegate: selfdelegateQueue: [NSOperationQueuemainQueue];

// 2. Create a download task
NSURL * url = [NSURLURLWithString: @ "http: // localhost: 8080/MJServer/resources/test.mp4"];
// NSURLSessionDownloadTask * task = [session downloadTaskWithURL: url completionHandler: ^ (NSURL * location, NSURLResponse * response, NSError * error ){
// NSLog (@ "% @", location );
//}];
NSURLSessionDownloadTask * task = [session downloadTaskWithURL: url];
// 3. Start the task
[Task resume];

// If the completionHandler block is set for the download task, the download proxy method is also implemented and the block is preferentially executed.
}
Note: After downloadtask is downloaded, save the data to the tmp temporary file in the sandbox. Cut the temporary file or copy the Caches folder.
# Pragma mark-NSURLSessionDownloadDelegate
/**
* Called after download
*
* @ Param location: Path of the temporary file (downloaded file)
*/
-(Void) URLSession :( NSURLSession *) session downloadTask :( NSURLSessionDownloadTask *) downloadTask didFinishDownloadingToURL :( NSURL *) location
{
// Location: Path of the temporary file (downloaded file)

NSString * caches = [NSSearchPathForDirectoriesInDomains (NSCachesDirectory, NSUserDomainMask, YES) lastObject];
// Response. suggestedFilename: Recommended file name, which is generally the same as the file name on the server.

NSString * file = [cachesstringByAppendingPathComponent: downloadTask. response. suggestedFilename];

// Cut the temporary file or copy the Caches folder
NSFileManager * mgr = [nsfilemanagerdefamanager];

// AtPath: the file path before cutting
// ToPath: the path of the cut File
[Mgr moveItemAtPath: location. pathtoPath: fileerror: nil];
}

/**
* Called when the download is resumed
*/
-(Void) URLSession :( NSURLSession *) session downloadTask :( NSURLSessionDownloadTask *) downloadTask didResumeAtOffset :( int64_t) fileOffset expectedTotalBytes :( int64_t) expectedTotalBytes
{

}
/**
* Each time a part is downloaded (written), it is called (may be called multiple times)
*
* @ Param bytesWritten what is written in this call
* @ Param totalBytesWritten total length written to the sandbox
* @ Param totalBytesExpectedToWrite the total length of the object
*/
-(Void) URLSession :( NSURLSession *) session downloadTask :( 0000*) downloadTask didWriteData :( int64_t) bytesWritten totalBytesWritten :( int64_t) totalBytesWritten listen :( int64_t)
{
Double progress = (double) totalBytesWritten/totalBytesExpectedToWrite;
NSLog (@ "download progress --- % f", progress );
}

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.