YYViewController.m #import "YYViewController.h" #define YYEncode(str) [str dataUsingEncoding:NSUTF8StringEncoding] @interface YYViewController () @end

@implementation YYViewController - (void)viewDidLoad {     [super viewDidLoad];     // Do any additional setup after loading the view, typically from a nib. } - (void)upload:(NSString *)name filename:(NSString *)filename mimeType:(NSString *)mimeType data:(NSData *)data parmas:(NSDictionary *)params {     // 文件上传     NSURL *url = [NSURL URLWithString:@"http://192.168.1.200:8080/YYServer/upload"];     NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];     request.HTTPMethod = @"POST";         // 设置请求体     NSMutableData *body = [NSMutableData data];         /***************文件参数***************/     // 参数开始的标志     [body appendData:YYEncode(@"--YY\r\n")];     // name : 指定参数名(必须跟服务器端保持一致)     // filename : 文件名     NSString *disposition = [NSString stringWithFormat:@"Content-Disposition: form-data; name=\"%@\"; filename=\"%@\"\r\n", name, filename];     [body appendData:YYEncode(disposition)];     NSString *type = [NSString stringWithFormat:@"Content-Type: %@\r\n", mimeType];     [body appendData:YYEncode(type)];         [body appendData:YYEncode(@"\r\n")];     [body appendData:data];     [body appendData:YYEncode(@"\r\n")];         /***************普通参数***************/     [params enumerateKeysAndObjectsUsingBlock:^(id key, id obj, BOOL *stop) {         // 参数开始的标志         [body appendData:YYEncode(@"--YY\r\n")];         NSString *disposition = [NSString stringWithFormat:@"Content-Disposition: form-data; name=\"%@\"\r\n", key];         [body appendData:YYEncode(disposition)];         [body appendData:YYEncode(@"\r\n")];         [body appendData:YYEncode(obj)];         [body appendData:YYEncode(@"\r\n")];     }];         /***************参数结束***************/     // YY--\r\n     [body appendData:YYEncode(@"--YY--\r\n")];     request.HTTPBody = body;         // 设置请求头     // 请求体的长度     [request setValue:[NSString stringWithFormat:@"%zd", body.length] forHTTPHeaderField:@"Content-Length"];     // 声明这个POST请求是个文件上传     [request setValue:@"multipart/form-data; boundary=YY" forHTTPHeaderField:@"Content-Type"];         // 发送请求     [NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue mainQueue] completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError) {         if (data) {             NSDictionary *dict = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableLeaves error:nil];             NSLog(@"%@", dict);         } else {             NSLog(@"上传失败");         }     }]; } - (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {     // Socket 实现断点上传         //apache-tomcat-6.0.41/conf/web.xml 查找 文件的 mimeType //    UIImage *image = [UIImage imageNamed:@"test"]; //    NSData *filedata = UIImagePNGRepresentation(image); //    [self upload:@"file" filename:@"test.png" mimeType:@"image/png" data:filedata parmas:@{@"username" : @"123"}];         // 给本地文件发送一个请求     NSURL *fileurl = [[NSBundle mainBundle] URLForResource:@"itcast.txt" withExtension:nil];     NSURLRequest *request = [NSURLRequest requestWithURL:fileurl];     NSURLResponse *repsonse = nil;     NSData *data = [NSURLConnection sendSynchronousRequest:request returningResponse:&repsonse error:nil];         // 得到mimeType     NSLog(@"%@", repsonse.MIMEType);     [self upload:@"file" filename:@"itcast.txt" mimeType:repsonse.MIMEType data:data parmas:@{                                                                                               @"username" : @"999",                                                                                               @"type" : @"XML"}]; } @end

#import "YYViewController.h" #import "YYFileMultiDownloader.h" @interface YYViewController () @property (nonatomic, strong) YYFileMultiDownloader *fileMultiDownloader; @end

@implementation YYViewController -  (YYFileMultiDownloader *)fileMultiDownloader {     if (!_fileMultiDownloader) {         _fileMultiDownloader = [[YYFileMultiDownloader alloc] init];         // 需要下载的文件远程URL         _fileMultiDownloader.url = @"http://192.168.1.200:8080/MJServer/resources/jre.zip";         // 文件保存到什么地方         NSString *caches = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) lastObject];         NSString *filepath = [caches stringByAppendingPathComponent:@"jre.zip"];         _fileMultiDownloader.destPath = filepath;     }     return _fileMultiDownloader; } - (void)viewDidLoad {     [super viewDidLoad];     } - (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {     [self.fileMultiDownloader start]; } @end

YYFileDownloader.h文件 #import <Foundation/Foundation.h> @interface YYFileDownloader : NSObject {     BOOL _downloading; } /**  * 所需要下载文件的远程URL(连接服务器的路径)  */ @property (nonatomic, copy) NSString *url; /**  * 文件的存储路径(文件下载到什么地方)  */ @property (nonatomic, copy) NSString *destPath; /**  * 是否正在下载(有没有在下载, 只有下载器内部才知道)  */ @property (nonatomic, readonly, getter = isDownloading) BOOL downloading; /**  * 用来监听下载进度  */ @property (nonatomic, copy) void (^progressHandler)(double progress); /**  * 开始(恢复)下载  */ - (void)start; /**  * 暂停下载  */ - (void)pause; @end

#import "YYFileDownloader.h" @implementation YYFileDownloader @end

#import "YYFileDownloader.h" @interface YYFileSingleDownloader : YYFileDownloader /**  *  开始的位置  */ @property (nonatomic, assign) long long begin; /**  *  结束的位置  */ @property (nonatomic, assign) long long end; @end

#import "YYFileSingleDownloader.h" @interface YYFileSingleDownloader() <NSURLConnectionDataDelegate> /**  * 连接对象  */ @property (nonatomic, strong) NSURLConnection *conn; /**  *  写数据的文件句柄  */ @property (nonatomic, strong) NSFileHandle *writeHandle; /**  *  当前已下载数据的长度  */ @property (nonatomic, assign) long long currentLength; @end

@implementation YYFileSingleDownloader - (NSFileHandle *)writeHandle {     if (!_writeHandle) {         _writeHandle = [NSFileHandle fileHandleForWritingAtPath:self.destPath];     }     return _writeHandle; } /**  * 开始(恢复)下载  */ - (void)start {     NSURL *url = [NSURL URLWithString:self.url];     // 默认就是GET请求     NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];     // 设置请求头信息     NSString *value = [NSString stringWithFormat:@"bytes=%lld-%lld", self.begin + self.currentLength, self.end];     [request setValue:value forHTTPHeaderField:@"Range"];     self.conn = [NSURLConnection connectionWithRequest:request delegate:self];         _downloading = YES; } /**  * 暂停下载  */ - (void)pause {     [self.conn cancel];     self.conn = nil;         _downloading = NO; } #pragma mark - NSURLConnectionDataDelegate 代理方法 /**  *  1. 当接受到服务器的响应(连通了服务器)就会调用  */ - (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response {     } /**  *  2. 当接受到服务器的数据就会调用(可能会被调用多次, 每次调用只会传递部分数据)  */ - (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {     // 移动到文件的尾部     [self.writeHandle seekToFileOffset:self.begin + self.currentLength];     // 从当前移动的位置(文件尾部)开始写入数据     [self.writeHandle writeData:data];         // 累加长度     self.currentLength += data.length;         // 打印下载进度     double progress = (double)self.currentLength / (self.end - self.begin);     if (self.progressHandler) {         self.progressHandler(progress);     } } /**  *  3. 当服务器的数据接受完毕后就会调用  */ - (void)connectionDidFinishLoading:(NSURLConnection *)connection {     // 清空属性值     self.currentLength = 0;         // 关闭连接(不再输入数据到文件中)     [self.writeHandle closeFile];     self.writeHandle = nil; } /**  *  请求错误(失败)的时候调用(请求超时\断网\没有网, 一般指客户端错误)  */ - (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error {     } @end

#import "YYFileDownloader.h" @interface YYFileMultiDownloader : YYFileDownloader   @end

#import "YYFileMultiDownloader.h" #import "YYFileSingleDownloader.h" #define YYMaxDownloadCount 4 @interface YYFileMultiDownloader() @property (nonatomic, strong) NSMutableArray *singleDownloaders; @property (nonatomic, assign) long long totalLength; @end

@implementation YYFileMultiDownloader - (void)getFilesize {     NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:self.url]];     request.HTTPMethod = @"HEAD";         NSURLResponse *response = nil; #warning 这里要用异步请求     [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:nil];     self.totalLength = response.expectedContentLength; } - (NSMutableArray *)singleDownloaders {     if (!_singleDownloaders) {         _singleDownloaders = [NSMutableArray array];                 // 获得文件大小         [self getFilesize];                 // 每条路径的下载量         long long size = 0;         if (self.totalLength % YYMaxDownloadCount == 0) {             size = self.totalLength / YYMaxDownloadCount;         } else {             size = self.totalLength / YYMaxDownloadCount + 1;         }                 // 创建N个下载器         for (int i = 0; i<YYMaxDownloadCount; i++) {             YYFileSingleDownloader *singleDownloader = [[YYFileSingleDownloader alloc] init];             singleDownloader.url = self.url;             singleDownloader.destPath = self.destPath;             singleDownloader.begin = i * size;             singleDownloader.end = singleDownloader.begin + size - 1;             singleDownloader.progressHandler = ^(double progress){                 NSLog(@"%d --- %f", i, progress);             };             [_singleDownloaders addObject:singleDownloader];         }                 // 创建一个跟服务器文件等大小的临时文件         [[NSFileManager defaultManager] createFileAtPath:self.destPath contents:nil attributes:nil];                 // 让self.destPath文件的长度是self.totalLengt         NSFileHandle *handle = [NSFileHandle fileHandleForWritingAtPath:self.destPath];         [handle truncateFileAtOffset:self.totalLength];     }     return _singleDownloaders; } /**  * 开始(恢复)下载  */ - (void)start {     [self.singleDownloaders makeObjectsPerformSelector:@selector(start)];         _downloading = YES; } /**  * 暂停下载  */ - (void)pause {     [self.singleDownloaders makeObjectsPerformSelector:@selector(pause)];     _downloading = NO; } @end