上传大文件 NSInputStream

/** *  @method + (NSString *)uploadVideoFilePath:(NSString *)filePath withFileName:(NSString *)fileName withFileExt:(NSString *)fileExt withErrorCode:(NSInteger *)errorCode * *  @abstract 上传文件 * *  @param fileData   文件数据 *  @param errorCode  [out]错误代码 * *  @return 如果上传成功则返回资源路径 */+ (NSString *)uploadVideoFilePath:(NSString *)filePath                     withFileName:(NSString *)fileName                      withFileExt:(NSString *)fileExt                    withErrorCode:(NSInteger *)errorCode{    NSMutableString * uploadFileURL = [[NSMutableString alloc] initWithCapacity:20];    [uploadFileURL appendFormat:@"http://%@/upload_file",UPLOAD_HOST];    [uploadFileURL appendFormat:@"?%@",[self getURLSuffixWithURL]];    //创建Request对象    NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];    [request setURL:[NSURL URLWithString:uploadFileURL]];    [request setHTTPMethod:@"POST"];    NSMutableData *body = [NSMutableData data];    //设置表单项分隔符    NSString *boundary = @"---------------------------20140601chrrsmusic1703";    //设置内容类型    NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@",boundary];    [request addValue:contentType forHTTPHeaderField: @"Content-Type"];    //写入图片的内容    NSString * fileFullName = [NSString stringWithFormat:@"%@.%@",fileName,fileExt];    [body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];    [body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"%@\"; filename=\"%@\"\r\n",fileName,fileFullName] dataUsingEncoding:NSUTF8StringEncoding]];    NSString * contentTypeStr = [NSString stringWithFormat:@"Content-Type: video/%@\r\n\r\n",fileExt];    [body appendData:[contentTypeStr dataUsingEncoding:NSUTF8StringEncoding]];    //    NSString * appendDataStr = [[NSString alloc] initWithData:body encoding:NSUTF8StringEncoding]];    //    DELOG(@"appendDataStr: \r\n%@",appendDataStr);    // 视频数据    NSInputStream * fileStream = [[NSInputStream alloc] initWithFileAtPath:filePath];    [fileStream open];    NSInteger maxLength = 128;    uint8_t readBuffer [maxLength];    BOOL endOfStreamReached = NO;    while (! endOfStreamReached)    {        NSInteger bytesRead = [fileStream read:readBuffer maxLength:maxLength];        if (bytesRead == 0)        {//文件读取到最后            endOfStreamReached = YES;        }else if (bytesRead == -1)        {//文件读取错误            endOfStreamReached = YES;        }else        {            [body appendBytes:readBuffer length:bytesRead];        }    }    [fileStream close];    [body appendData:[[NSString stringWithFormat:@"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];    //写入尾部内容    [body appendData:[[NSString stringWithFormat:@"--%@--\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];    [request setHTTPBody:body];    NSHTTPURLResponse *urlResponese = nil;    NSError *error = [[NSError alloc]init];    NSData* resultData = [NSURLConnection sendSynchronousRequest:request returningResponse:&urlResponese error:&error];    if (!resultData) {        *errorCode = -1;        return nil;    }    NSDictionary *jsonData = [NSJSONSerialization JSONObjectWithData:resultData options:NSJSONReadingMutableLeaves error:nil];    NSInteger statusCode = [[NSString ensureStringFor:[jsonData objectForKey:@"state"]] integerValue];    *errorCode = statusCode;    if (statusCode == 402) {        // 发出需要登录的通知        dispatch_async(dispatch_get_main_queue(), ^{            [[NSNotificationCenter defaultCenter] postNotificationName:NOTIFICATION_NEED_LOGINTOKEN                                                                object:nil];        });    }    if (statusCode != 0) {        *errorCode = statusCode;        return nil;    }else{        NSDictionary * data = [jsonData objectForKey:@"data"];        if (![data isKindOfClass:[NSDictionary class]]) {            return nil;        }else{            NSString * fileURL = [NSString ensureStringFor:[data objectForKey:@"uri"]];            return fileURL;        }    }}