-
用NSURLSession发送GET 和 POST发送请求
-(void)sendGet
{
NSURL *url = [NSURL URLWithString:@"http://120.25.226.186:32812/login?username=520it&pwd=520it&type=JSON"];
//创建会话对象
NSURLSession *session = [NSURLSession sharedSession];
/**
*
* URL:请求路径
* completionHandler: 当请求完成之后调用
* @param data 响应体信息
* @param response 响应头信息
* @param error 错误信息当请求失败的时候 error有值
*
*/
NSURLSessionTask *dataTask = [session dataTaskWithURL:url completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {
NSLog(@"%@",[[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding]);
}];
//NSURLSessionTask 创建默认不是开启的,需要开启
[dataTask resume];
}
-(void)sendPost
{
NSURL *url = [NSURL URLWithString:@"http://120.25.226.186:32812/login"];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
//设置请求的方式POST GET可以不设置请求方式
request.HTTPMethod = @"POST";
//设置请求体
request.HTTPBody = [@"username=520it&pwd=520it&type=JSON" dataUsingEncoding:NSUTF8StringEncoding];
NSURLSession *session = [NSURLSession sharedSession];
NSURLSessionDataTask * dataTask = [session dataTaskWithRequest:request completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {
NSLog(@"%@",[[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding]);
}];
[dataTask resume];
}
#import "ViewController.h"
@interface ViewController ()<NSURLSessionDataDelegate>
/** 接受数据 */
@property(nonatomic,strong)NSMutableData * fileData ;
@end
@implementation ViewController
-(void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
{
[self sendGET];
}
-(NSMutableData *)fileData
{
if (_fileData ==nil) {
_fileData = [NSMutableData data];
}
return _fileData;
}
-(void)sendGET
{
NSURL *url = [NSURL URLWithString:@"http://120.25.226.186:32812/login?username=520it&pwd=520it&type=JSON"];
NSURLRequest *request = [NSURLRequest requestWithURL:url];
/**
* configuration:配置信息 [NSURLSessionConfiguration defaultSessionConfiguration]
delegate:
delegateQueue:设置代理方法在哪个线程中执行
*/
NSURLSession *session = [NSURLSession sessionWithConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration] delegate:self delegateQueue:[NSOperationQueue mainQueue]];
NSURLSessionDataTask * dataTask = [session dataTaskWithRequest:request];
[dataTask resume];
}
/**
* 接受到服务器的响应,默认会取消该请求
*
* @param session 会话对象
* @param dataTask 请求任务
* @param response 响应头信息
* @param completionHandler 回调信息 传给系统的
*/
-(void)URLSession:(NSURLSession *)session dataTask:(NSURLSessionDataTask *)dataTask didReceiveResponse:(NSURLResponse *)response completionHandler:(void (^)(NSURLSessionResponseDisposition))completionHandler
{
/*
NSURLSessionResponseCancel = 0,取消 默认
NSURLSessionResponseAllow = 1, 接收
NSURLSessionResponseBecomeDownload = 2, 变成下载任务
NSURLSessionResponseBecomeStream 变成流
*/
completionHandler(NSURLSessionResponseAllow);
NSLog(@"%s, line = %d",__FUNCTION__,__LINE__);
}
/**
* 接受到服务器返回的数据 调用多次
*
* @param session 会话对象
* @param dataTask 请求任务
* @param data 本次下载的数据
*/
-(void)URLSession:(NSURLSession *)session dataTask:(NSURLSessionDataTask *)dataTask didReceiveData:(NSData *)data
{
NSLog(@"%s, line = %d",__FUNCTION__,__LINE__);
[self.fileData appendData:data];
}
/**
* 请求结束或者请求成功、失败调用
*
* @param session 会话对象
* @param dataTask 请求任务
* @param error 错误信息
*/
-(void)URLSession:(NSURLSession *)session task:(NSURLSessionTask *)task didCompleteWithError:(NSError *)error
{
NSLog(@"%s, line = %d",__FUNCTION__,__LINE__);
NSLog(@"%@",[[NSString alloc]initWithData:self.fileData encoding:NSUTF8StringEncoding]);
}
@end
-
NSURLSessionDownloadTask下载大文件
NSURL *url = [NSURL URLWithString:@"http://120.25.226.186:32812/resources/images/minion_03.png"];
NSURLRequest *request = [NSURLRequest requestWithURL:url];
NSURLSession *session = [NSURLSession sharedSession];
/**
* @param location 一个临时文件的位置(文件下载到哪个位置)
* @param response 响应头信息
* @param error 错误信息
* 该方法内部已经实现了边接受数据边写沙盒(tmp)的操作
*/
NSURLSessionDownloadTask * downloadTask = [session downloadTaskWithRequest:request completionHandler:^(NSURL * _Nullable location, NSURLResponse * _Nullable response, NSError * _Nullable error) {
NSLog(@"%@--%@",location,[NSThread currentThread]);
//拼接文件全路径
NSString *fullPath = [[NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) lastObject] stringByAppendingPathComponent:response.suggestedFilename];
//剪切文件
[[NSFileManager defaultManager]moveItemAtURL:location toURL:[NSURL fileURLWithPath:fullPath] error:nil];
NSLog(@"%@",fullPath);
}];
[downloadTask resume];
-
NSURLSessionDownloadTask代理方法
-(void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
{
NSURL *url = [NSURL URLWithString:@"http://120.25.226.186:32812/resources/images/minion_03.png"];
NSURLRequest *requeset = [NSURLRequest requestWithURL:url];
NSURLSession *session = [NSURLSession sessionWithConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration] delegate:self delegateQueue:[NSOperationQueue mainQueue]];
NSURLSessionDownloadTask *download = [session downloadTaskWithRequest:requeset];
[download resume];
}
/**
* 写入数据时调用该方法
*
* @param session 会话对象
* @param downloadTask 下载任务
* @param bytesWritten 本次写入的数据大小
* @param totalBytesWritten 下载的数据总大小
* @param totalBytesExpectedToWrite 文件的总大小
*/
-(void)URLSession:(NSURLSession *)session
downloadTask:(NSURLSessionDownloadTask *)downloadTask
didWriteData:(int64_t)bytesWritten
totalBytesWritten:(int64_t)totalBytesWritten
totalBytesExpectedToWrite:(int64_t)totalBytesExpectedToWrite
{
//获得文件的下载进度
NSLog(@"%f",1.0* totalBytesWritten/totalBytesExpectedToWrite);
}
/**
* 恢复下载的时候调用该方法
*
* @param session 会话对象
* @param downloadTask 下载任务
* @param fileOffset 从什么地方下载
* @param expectedTotalBytes 文件的总大小
*/
-(void)URLSession:(NSURLSession *)session
downloadTask:(NSURLSessionDownloadTask *)downloadTask
didResumeAtOffset:(int64_t)fileOffset
expectedTotalBytes:(int64_t)expectedTotalBytes
{
NSLog(@"expectedTotalBytes----%lld fileOffset---%lld",expectedTotalBytes,fileOffset);
}
/**
* 当下载完成的时候调用
*
* @param session 会话对象
* @param downloadTask 下载任务
* @param location 文件的临时存储路径
*/
-(void)URLSession:(NSURLSession *)session
downloadTask:(NSURLSessionDownloadTask *)
downloadTask didFinishDownloadingToURL:(NSURL *)location
{
//拼接文件全路径
NSString *fullPath = [[NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) lastObject] stringByAppendingPathComponent:downloadTask.response.suggestedFilename];
//剪切文件
[[NSFileManager defaultManager]moveItemAtURL:location toURL:[NSURL fileURLWithPath:fullPath] error:nil];
NSLog(@"%@",fullPath);
}
-
NSURLSessionDownloadTask 断点下载
#import "ViewController.h"
@interface ViewController ()<NSURLSessionDownloadDelegate>
@property(nonatomic,strong)NSURLSessionDownloadTask * downloadTask ;
/**
* 下载的数据
*/
@property (nonatomic, strong) NSData *resumData;
@property (nonatomic, strong) NSURLSession *session;
@end
@implementation ViewController
- (IBAction)startDownload:(id)sender
{
NSURL *url = [NSURL URLWithString:@"http://120.25.226.186:32812/resources/videos/minion_01.mp4"];
NSURLRequest *requeset = [NSURLRequest requestWithURL:url];
self.session = [NSURLSession sessionWithConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration] delegate:self delegateQueue:[NSOperationQueue mainQueue]];
self.downloadTask = [self.session downloadTaskWithRequest:requeset];
[self.downloadTask resume];
}
- (IBAction)suspendedDownload:(id)sender
{
//暂停方法
NSLog(@"++++++++暂停");
[self.downloadTask suspend];
}
- (IBAction)continueDownload:(id)sender
{
NSLog(@"+++++++继续");
//判断一下如果有数据才可以继续
if (self.resumData) {
self.downloadTask = [self.session downloadTaskWithResumeData:self.resumData];
}
[self.downloadTask resume];
}
//cancel:取消是不能恢复
//cancelByProducingResumeData:数据可以恢复
- (IBAction)cancelDownload:(id)sender
{
NSLog(@"++++++++取消");
//恢复下载的数据!=文件数据
[self.downloadTask cancelByProducingResumeData:^(NSData * _Nullable resumeData) {
self.resumData = resumeData;
}];
}
/**
* 写入数据时调用该方法
*
* @param session 会话对象
* @param downloadTask 下载任务
* @param bytesWritten 本次写入的数据大小
* @param totalBytesWritten 下载的数据总大小
* @param totalBytesExpectedToWrite 文件的总大小
*/
-(void)URLSession:(NSURLSession *)session
downloadTask:(NSURLSessionDownloadTask *)downloadTask
didWriteData:(int64_t)bytesWritten
totalBytesWritten:(int64_t)totalBytesWritten
totalBytesExpectedToWrite:(int64_t)totalBytesExpectedToWrite
{
//获得文件的下载进度
NSLog(@"%f",1.0 * totalBytesWritten/totalBytesExpectedToWrite);
}
/**
* 恢复下载的时候调用该方法
*
* @param session 会话对象
* @param downloadTask 下载任务
* @param fileOffset 从什么地方下载
* @param expectedTotalBytes 文件的总大小
*/
-(void)URLSession:(NSURLSession *)session
downloadTask:(NSURLSessionDownloadTask *)downloadTask
didResumeAtOffset:(int64_t)fileOffset
expectedTotalBytes:(int64_t)expectedTotalBytes
{
NSLog(@"expectedTotalBytes----%lld fileOffset---%lld",expectedTotalBytes,fileOffset);
}
/**
* 当下载完成的时候调用
*
* @param session 会话对象
* @param downloadTask 下载任务
* @param location 文件的临时存储路径
*/
-(void)URLSession:(NSURLSession *)session
downloadTask:(NSURLSessionDownloadTask *)
downloadTask didFinishDownloadingToURL:(NSURL *)location
{
//拼接文件全路径
NSString *fullPath = [[NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) lastObject] stringByAppendingPathComponent:downloadTask.response.suggestedFilename];
//剪切文件
[[NSFileManager defaultManager]moveItemAtURL:location toURL:[NSURL fileURLWithPath:fullPath] error:nil];
NSLog(@"%@",fullPath);
}
@end
-
NSURLSession断点续传,app退出后,再次下载会下载之前未完成的数据
#import "ViewController.h"
@interface ViewController ()<NSURLSessionDataDelegate>
@property(nonatomic,strong)NSURLSessionDataTask * dataTask ;
/**
* 下载的数据
*/
@property (nonatomic, strong) NSData *resumData;
@property (weak, nonatomic) IBOutlet UIProgressView *progressView;
@property (nonatomic, strong) NSURLSession *session;
/** 接受响应体信息 */
@property (nonatomic, strong) NSFileHandle *handle;
@property (nonatomic, assign) NSInteger totalSize;
@property (nonatomic, assign) NSInteger currentSize;
@property (nonatomic, strong) NSString *fullPath;
@end
@implementation ViewController
-(NSString *)fullPath
{
if (_fullPath ==nil) {
_fullPath = [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject]stringByAppendingPathComponent:@"666.mp4"];
}
return _fullPath;
}
-(NSURLSession *)session
{
if (_session ==nil) {
_session = [NSURLSession sessionWithConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration] delegate:self delegateQueue:[NSOperationQueue mainQueue]];
}
return _session;
}
-(NSURLSessionDataTask *)dataTask
{
if (_dataTask ==nil) {
NSURL *url = [NSURL URLWithString:@"http://120.25.226.186:32812/resources/videos/minion_01.mp4"];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
self.currentSize = [self getFileSize];
//设置请求头信息
NSString *range = [NSString stringWithFormat:@"bytes=%zd-",self.currentSize];
[request setValue:range forHTTPHeaderField:@"Range"];
_dataTask = [self.session dataTaskWithRequest:request];
}
return _dataTask;
}
-(NSInteger)getFileSize
{
NSDictionary *fileInfoDict = [[NSFileManager defaultManager]attributesOfItemAtPath:self.fullPath error:nil];
NSLog(@"fileInfoDict = %@",fileInfoDict);
NSInteger currentSizd = [fileInfoDict[@"NSFileSize"]integerValue];
return currentSizd ;
}
- (IBAction)startDownload:(id)sender
{
[self.dataTask resume];
}
- (IBAction)suspendedDownload:(id)sender
{
//暂停方法
NSLog(@"++++++++暂停");
[self.dataTask suspend];
}
- (IBAction)continueDownload:(id)sender
{
NSLog(@"+++++++继续");
[self.dataTask resume];
}
//cancel:取消是不能恢复
//cancelByProducingResumeData:数据可以恢复
- (IBAction)cancelDownload:(id)sender
{
NSLog(@"++++++++取消");
[self.dataTask cancel];
self.dataTask = nil;
}
-(void)URLSession:(NSURLSession *)session dataTask:(NSURLSessionDataTask *)dataTask didReceiveResponse:(NSURLResponse *)response completionHandler:(void (^)(NSURLSessionResponseDisposition))completionHandler
{
self.totalSize = response.expectedContentLength + self.currentSize;
if (self.currentSize ==0) {
[[NSFileManager defaultManager]createFileAtPath:self.fullPath contents:nil attributes:nil];
}
//创建文件句柄
self.handle = [NSFileHandle fileHandleForWritingAtPath:self.fullPath];
//移动文件句柄指针
[self.handle seekToEndOfFile];
completionHandler(NSURLSessionResponseAllow);
}
-(void)URLSession:(NSURLSession *)session dataTask:(NSURLSessionDataTask *)dataTask didReceiveData:(NSData *)data
{
[self.handle writeData: data];
self.currentSize += data.length;
NSLog(@"%f",1.0 * self.currentSize /self.totalSize);
self.progressView.progress = 1.0 * self.currentSize / self.totalSize;
}
-(void)URLSession:(NSURLSession *)session task:(NSURLSessionTask *)task didCompleteWithError:(NSError *)error
{
NSLog(@"%@",self.fullPath);
[self.handle closeFile];
self.handle = nil;
}
-(void)dealloc
{
//session用完后需要清理一下,不然内存会泄漏
[self.session invalidateAndCancel];
}
@end
#import "ViewController.h"
#define Kboundary @"----WebKitFormBoundaryjv0UfA04ED44AhWx"
#define KNewLine [@"\r\n" dataUsingEncoding:NSUTF8StringEncoding]
@interface ViewController ()<NSURLSessionDataDelegate>
@property (nonatomic, strong) NSURLSession *session;
@end
@implementation ViewController
-(NSURLSession *)session
{
if (_session == nil) {
NSURLSessionConfiguration *config = [NSURLSessionConfiguration defaultSessionConfiguration];
//是否运行蜂窝访问
config.allowsCellularAccess = YES;
//请求超时时间
config.timeoutIntervalForRequest = 15;
_session = [NSURLSession sessionWithConfiguration:config delegate:self delegateQueue:[NSOperationQueue mainQueue]];
}
return _session;
}
-(void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
{
[self upload2];
}
-(void)upload2
{
//1.url
NSURL *url = [NSURL URLWithString:@"http://120.25.226.186:32812/upload"];
//2.创建请求对象
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
//2.1 设置请求方法
request.HTTPMethod = @"POST";
//2.2 设请求头信息
[request setValue:[NSString stringWithFormat:@"multipart/form-data; boundary=%@",Kboundary] forHTTPHeaderField:@"Content-Type"];
//3.创建会话对象
//4.创建上传TASK
/*
第一个参数:请求对象
第二个参数:传递是要上传的数据(请求体)
*/
NSURLSessionUploadTask *uploadTask = [self.session uploadTaskWithRequest:request fromData:[self getBodyData] completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {
//6.解析
NSLog(@"%@",[[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding]);
}];
//5.执行Task
[uploadTask resume];
}
-(NSData *)getBodyData
{
NSMutableData *fileData = [NSMutableData data];
//5.1 文件参数
/*
--分隔符
Content-Disposition: form-data; name="file"; filename="Snip20160225_341.png"
Content-Type: image/png(MIMEType:大类型/小类型)
空行
文件参数
*/
[fileData appendData:[[NSString stringWithFormat:@"--%@",Kboundary] dataUsingEncoding:NSUTF8StringEncoding]];
[fileData appendData:KNewLine];
//name:file 服务器规定的参数
//filename:Snip20160225_341.png 文件保存到服务器上面的名称
//Content-Type:文件的类型
[fileData appendData:[@"Content-Disposition: form-data; name=\"file\"; filename=\"Sss.png\"" dataUsingEncoding:NSUTF8StringEncoding]];
[fileData appendData:KNewLine];
[fileData appendData:[@"Content-Type: image/png" dataUsingEncoding:NSUTF8StringEncoding]];
[fileData appendData:KNewLine];
[fileData appendData:KNewLine];
UIImage *image = [UIImage imageNamed:@"Snip20160226_90"];
//UIImage --->NSData
NSData *imageData = UIImagePNGRepresentation(image);
[fileData appendData:imageData];
[fileData appendData:KNewLine];
//5.2 非文件参数
/*
--分隔符
Content-Disposition: form-data; name="username"
空行
123456
*/
[fileData appendData:[[NSString stringWithFormat:@"--%@",Kboundary] dataUsingEncoding:NSUTF8StringEncoding]];
[fileData appendData:KNewLine];
[fileData appendData:[@"Content-Disposition: form-data; name=\"username\"" dataUsingEncoding:NSUTF8StringEncoding]];
[fileData appendData:KNewLine];
[fileData appendData:KNewLine];
[fileData appendData:[@"123456" dataUsingEncoding:NSUTF8StringEncoding]];
[fileData appendData:KNewLine];
//5.3 结尾标识
/*
--分隔符--
*/
[fileData appendData:[[NSString stringWithFormat:@"--%@--",Kboundary] dataUsingEncoding:NSUTF8StringEncoding]];
return fileData;
}
#pragma mark ----------------------
#pragma mark NSURLSessionDataDelegate
/*
* @param bytesSent 本次发送的数据
* @param totalBytesSent 上传完成的数据大小
* @param totalBytesExpectedToSend 文件的总大小
*/
-(void)URLSession:(NSURLSession *)session task:(NSURLSessionTask *)task didSendBodyData:(int64_t)bytesSent totalBytesSent:(int64_t)totalBytesSent totalBytesExpectedToSend:(int64_t)totalBytesExpectedToSend
{
NSLog(@"%f",1.0 *totalBytesSent / totalBytesExpectedToSend);
}
@end