IOS http(上传和下载)

HttpTool.h

#import <Foundation/Foundation.h>

typedef void (^HttpToolProgressBlock)(CGFloat progress);

typedef void (^HttpToolCompletionBlock)(NSError *error);

@interface HttpTool : NSObject

-(void)uploadData:(NSData *)data

              url:(NSURL *)url

    progressBlock : (HttpToolProgressBlock)progressBlock

            completion:(HttpToolCompletionBlock) completionBlock;

/**

 下载数据

 */

-(void)downLoadFromURL:(NSURL *)url

        progressBlock : (HttpToolProgressBlock)progressBlock

            completion:(HttpToolCompletionBlock) completionBlock;

-(NSString *)fileSavePath:(NSString *)fileName;

@end

#import "HttpTool.h"

#define kTimeOut 5.0

@interface HttpTool()<NSURLSessionDownloadDelegate,NSURLSessionTaskDelegate>{

    //下载

    HttpToolProgressBlock _dowloadProgressBlock;

    HttpToolCompletionBlock _downladCompletionBlock;

    NSURL *_downloadURL;

    //上传

    HttpToolProgressBlock _uploadProgressBlock;

    HttpToolCompletionBlock _uploadCompletionBlock;

}

@end

@implementation HttpTool

#pragma mark - 上传

-(void)uploadData:(NSData *)data url:(NSURL *)url progressBlock:(HttpToolProgressBlock)progressBlock completion:(HttpToolCompletionBlock)completionBlock{

    NSAssert(data != nil, @"上传数据不能为空");

    NSAssert(url != nil, @"上传文件路径不能为空");

    _uploadProgressBlock = progressBlock;

    _uploadCompletionBlock = completionBlock;

    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:kTimeOut];

    request.HTTPMethod = @"PUT";

    NSURLSessionConfiguration *config = [NSURLSessionConfiguration defaultSessionConfiguration];

    //NSURLSessionDownloadDelegate

    NSURLSession *session = [NSURLSession sessionWithConfiguration:config delegate:self delegateQueue:[[NSOperationQueue alloc] init]];

    //定义下载操作

    NSURLSessionUploadTask *uploadTask = [session uploadTaskWithRequest:request fromData:data];

    [uploadTask resume];

}

#pragma mark - 上传代理

#pragma mark - 上传进度

-(void)URLSession:(NSURLSession *)session task:(NSURLSessionTask *)task didSendBodyData:(int64_t)bytesSent totalBytesSent:(int64_t)totalBytesSent totalBytesExpectedToSend:(int64_t)totalBytesExpectedToSend{

    if (_uploadProgressBlock) {

        CGFloat progress = (CGFloat) totalBytesSent / totalBytesExpectedToSend;

        _uploadProgressBlock(progress);

    }

}

#pragma mark - 上传完成

-(void)URLSession:(NSURLSession *)session task:(NSURLSessionTask *)task didCompleteWithError:(NSError *)error{

    if (_uploadCompletionBlock) {

        _uploadCompletionBlock(error);

        _uploadProgressBlock = nil;

        _uploadCompletionBlock = nil;

    }

}

#pragma mark - 下载

-(void)downLoadFromURL:(NSURL *)url

         progressBlock:(HttpToolProgressBlock)progressBlock

            completion:(HttpToolCompletionBlock)completionBlock{

    NSAssert(url != nil, @"下载URL不能传空");

    _downloadURL = url;

    _dowloadProgressBlock = progressBlock;

    _downladCompletionBlock = completionBlock;

    NSURLRequest *request = [NSURLRequest requestWithURL:url cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:kTimeOut];

    //session 大多数使用单例即可

    NSURLResponse *response = nil;

    //发达同步请求

    [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:nil];

    //NSLog(@"%lld",response.expectedContentLength);

    if (response.expectedContentLength <= ) {

        if (_downladCompletionBlock) {

            NSError *error =[NSError errorWithDomain:@"文件不存在" code: userInfo:nil];

            _downladCompletionBlock(error);

            //清除block

            _downladCompletionBlock = nil;

            _dowloadProgressBlock = nil;

        }

        return;

    }

    NSURLSessionConfiguration *config = [NSURLSessionConfiguration defaultSessionConfiguration];

    //NSURLSessionDownloadDelegate

    NSURLSession *session = [NSURLSession sessionWithConfiguration:config delegate:self delegateQueue:[[NSOperationQueue alloc] init]];

    //定义下载操作

    NSURLSessionDownloadTask *downloadTask = [session downloadTaskWithRequest:request];

    [downloadTask resume];

}

#pragma mark -NSURLSessionDownloadDelegate

#pragma mark 下载完成

-(void)URLSession:(NSURLSession *)session downloadTask:(NSURLSessionDownloadTask *)downloadTask didFinishDownloadingToURL:(NSURL *)location{

    //图片保存在沙盒的Doucument下

    NSString *fileSavePath = [self fileSavePath:[_downloadURL lastPathComponent]];

    //文件管理

    NSFileManager *fileManager = [NSFileManager defaultManager];

    [fileManager copyItemAtURL:location toURL:[NSURL fileURLWithPath:fileSavePath] error:nil];

    if (_downladCompletionBlock) {

        //通知下载成功，没有没有错误

        _downladCompletionBlock(nil);

        //清空block

        _downladCompletionBlock = nil;

        _dowloadProgressBlock = nil;

    }

}

#pragma mark 下载进度

-(void)URLSession:(NSURLSession *)session downloadTask:(NSURLSessionDownloadTask *)downloadTask didWriteData:(int64_t)bytesWritten totalBytesWritten:(int64_t)totalBytesWritten totalBytesExpectedToWrite:(int64_t)totalBytesExpectedToWrite{

    if (_dowloadProgressBlock) {

        //已写数据字节数除以总字节数就是下载进度

        CGFloat progress = (CGFloat)totalBytesWritten / totalBytesExpectedToWrite;

        _dowloadProgressBlock(progress);

    }

}

-(void)URLSession:(NSURLSession *)session downloadTask:(NSURLSessionDownloadTask *)downloadTask didResumeAtOffset:(int64_t)fileOffset expectedTotalBytes:(int64_t)expectedTotalBytes{

}

#pragma mark -传一个文件名，返回一个在沙盒Document下的文件路径

-(NSString *)fileSavePath:(NSString *)fileName{

    NSString *document = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)[];

    //图片保存在沙盒的Doucument下

    return [document stringByAppendingPathComponent:fileName];

}

@end