#import "XNUploadFile.h" 
 
#define kTimeOut 5.0f 
 
@implementation XNUploadFile 
/** 分隔字符串 */ 
static NSString *boundaryStr = @"--"; 
/** 本次上傳標(biāo)示字符串 */ 
static NSString *randomIDStr; 
/** 上傳(php)腳本中，接收文件字段 */ 
static NSString *uploadID; 
 
- (instancetype)init 
{ 
 self = [super init]; 
 if (self) { 
 /** 本次上傳標(biāo)示字符串 */ 
 randomIDStr = @"itcastupload"; 
 /** 上傳(php)腳本中，接收文件字段 */ 
 // 可以咨詢公司的網(wǎng)站開(kāi)發(fā)程序員 
 // 或者用FireBug自己跟蹤調(diào)試 
 uploadID = @"uploadFile"; 
 } 
 return self; 
} 
 
#pragma mark - 成員方法. 用NSURLSession來(lái)完成上傳 
- (void)uploadFile:(NSString *)path fileName:(NSString *)fileName completion:(void (^)(NSString *string))completion 
{ 
 // 1. url 提示：真正負(fù)責(zé)文件上傳的是php文件，而不是html文件 
 NSURL *url = [NSURL URLWithString:@"http://localhost/new/post/upload.php"]; 
 
 // 2. request 
 NSURLRequest *request = [self requestForUploadURL:url uploadFileName:fileName localFilePath:path]; 
 
 // 3. session（回話） 
 // 全局網(wǎng)絡(luò)回話，為了方便程序員使用網(wǎng)絡(luò)服務(wù) 
 NSURLSession *session = [NSURLSession sharedSession]; 
 
 // 4. 數(shù)據(jù)任務(wù)-> 任務(wù)都是由回話發(fā)起的 
 /** URLSession的任務(wù)，默認(rèn)都是在其他線程工作的，默認(rèn)都是異步的 */ 
 [[session dataTaskWithRequest:request completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) { 
  
 id result = [NSJSONSerialization JSONObjectWithData:data options:0 error:NULL]; 
  
 NSLog(@"%@ %@", result, [NSThread currentThread]); 
  
 dispatch_async(dispatch_get_main_queue(), ^{ 
  if (completion) { 
  completion(@"下載完成"); 
  } 
 }); 
 }] resume]; 
 
 // NSURLSessionDataTask *task = [session dataTaskWithRequest:request completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) { 
 // 
 // id result = [NSJSONSerialization JSONObjectWithData:data options:0 error:NULL]; 
 // 
 // NSLog(@"%@ %@", result, [NSThread currentThread]); 
 // 
 // dispatch_async(dispatch_get_main_queue(), ^{ 
 //  if (completion) { 
 //  completion(@"下載完成"); 
 //  } 
 // }); 
 // }]; 
 // 
 // // 5. 啟動(dòng)任務(wù) 
 // [task resume]; 
} 
 
#pragma mark - 私有方法 ： 拼字符串 
/** 拼接頂部字符串 */ 
- (NSString *)topStringWithMimeType:(NSString *)mimeType uploadFile:(NSString *)uploadFile 
{ 
 NSMutableString *strM = [NSMutableString string]; 
 
 [strM appendFormat:@"%@%@\n", boundaryStr, randomIDStr]; 
 [strM appendFormat:@"Content-Disposition: form-data; name=\"%@\"; filename=\"%@\"\n", uploadID, uploadFile]; 
 [strM appendFormat:@"Content-Type: %@\n\n", mimeType]; 
 
 NSLog(@"頂部字符串：%@", strM); 
 return [strM copy]; 
} 
 
/** 拼接底部字符串 */ 
- (NSString *)bottomString 
{ 
 NSMutableString *strM = [NSMutableString string]; 
 
 [strM appendFormat:@"%@%@\n", boundaryStr, randomIDStr]; 
 [strM appendString:@"Content-Disposition: form-data; name=\"submit\"\n\n"]; 
 [strM appendString:@"Submit\n"]; 
 [strM appendFormat:@"%@%@--\n", boundaryStr, randomIDStr]; 
 
 NSLog(@"底部字符串：%@", strM); 
 return [strM copy]; 
} 
 
/** 指定全路徑文件的mimeType */ 
- (NSString *)mimeTypeWithFilePath:(NSString *)filePath 
{ 
 // 1. 判斷文件是否存在 
 if (![[NSFileManager defaultManager] fileExistsAtPath:filePath]) { 
 return nil; 
 } 
 
 // 2. 使用HTTP HEAD方法獲取上傳文件信息 
 NSURL *url = [NSURL fileURLWithPath:filePath]; 
 NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url]; 
 
 // 3. 調(diào)用同步方法獲取文件的MimeType 
 NSURLResponse *response = nil; 
 [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:NULL]; 
 
 return response.MIMEType; 
} 
 
/** 上傳文件網(wǎng)絡(luò)請(qǐng)求 */ 
- (NSURLRequest *)requestForUploadURL:(NSURL *)url uploadFileName:(NSString *)fileName localFilePath:(NSString *)filePath 
{ 
 // 0. 獲取上傳文件的mimeType 
 NSString *mimeType = [self mimeTypeWithFilePath:filePath]; 
 if (!mimeType) return nil; 
 
 // 1. 拼接要上傳的數(shù)據(jù)體 
 NSMutableData *dataM = [NSMutableData data]; 
 [dataM appendData:[[self topStringWithMimeType:mimeType uploadFile:fileName] dataUsingEncoding:NSUTF8StringEncoding]]; 
 // 拼接上傳文件本身的二進(jìn)制數(shù)據(jù) 
 [dataM appendData:[NSData dataWithContentsOfFile:filePath]]; 
 [dataM appendData:[[self bottomString] dataUsingEncoding:NSUTF8StringEncoding]]; 
 
 // 2. 設(shè)置請(qǐng)求 
 NSMutableURLRequest *requestM = [NSMutableURLRequest requestWithURL:url cachePolicy:0 timeoutInterval:kTimeOut]; 
 // 1> 設(shè)定HTTP請(qǐng)求方式 
 requestM.HTTPMethod = @"POST"; 
 // 2> 設(shè)置數(shù)據(jù)體 
 requestM.HTTPBody = dataM; 
 // 3> 指定Content-Type 
 NSString *typeStr = [NSString stringWithFormat:@"multipart/form-data; boundary=%@", randomIDStr]; 
 [requestM setValue:typeStr forHTTPHeaderField:@"Content-Type"]; 
 // 4> 指定數(shù)據(jù)長(zhǎng)度 
 NSString *lengthStr = [NSString stringWithFormat:@"%@", @([dataM length])]; 
 [requestM setValue:lengthStr forHTTPHeaderField:@"Content-Length"]; 
 
 return [requestM copy]; 
} 

- (void)putFile 
{ 
 // 1. url 最后一個(gè)是要上傳的文件名 
 NSURL *url = [NSURL URLWithString:@"http://localhost/uploads/abcd"]; //abcd為文件名 
 
 // 2. request 
 NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url]; 
 request.HTTPMethod = @"PUT"; 
// request.HTTPMethod = @"DELETE"; 
 
 // 設(shè)置用戶授權(quán) 
 // BASE64編碼：一種對(duì)字符串和二進(jìn)制數(shù)據(jù)進(jìn)行編碼的一種“最常用的網(wǎng)絡(luò)編碼方式”，此編碼可以將二進(jìn)制數(shù)據(jù)轉(zhuǎn)換成字符串！ 
 // 是很多加密算法的底層算法 
 // BASE64支持反編碼，是一種雙向的編碼方案 
 NSString *authStr = @"admin:123"; 
 NSString *authBase64 = [NSString stringWithFormat:@"Basic %@", [self base64Encode:authStr]]; 
 [request setValue:authBase64 forHTTPHeaderField:@"Authorization"]; 
 
 // 3. URLSession 
 NSURLSession *session = [NSURLSession sharedSession]; 
 
 // 4. 由session發(fā)起任務(wù) 
 NSURL *localURL = [[NSBundle mainBundle] URLForResource:@"001.png" withExtension:nil]; 
 [[session uploadTaskWithRequest:request fromFile:localURL completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) { 
  
 NSString *result = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding]; 
  
 NSLog(@"sesult---> %@ %@", result, [NSThread currentThread]); 
 }] resume]; 
} 
 
- (NSString *)base64Encode:(NSString *)str 
{ 
 // 1. 將字符串轉(zhuǎn)換成二進(jìn)制數(shù)據(jù) 
 NSData *data = [str dataUsingEncoding:NSUTF8StringEncoding]; 
 
 // 2. 對(duì)二進(jìn)制數(shù)據(jù)進(jìn)行base64編碼 
 NSString *result = [data base64EncodedStringWithOptions:0]; 
 
 NSLog(@"base464--> %@", result); 
 
 return result; 
}