头文件—————————————————————————————
@interface JRUploadRequest : NSMutableURLRequest
//初始化方法
+ (JRUploadRequest *)uploadRequestWithPath:(NSString *)path;
- (JRUploadRequest *)initWithPath:(NSString *)path;
//开始上传
- (void)upload;
//存到服务器中的文件名
@property (nonatomic, strong) NSString * fileName;
//资源地址(绝对路径)
@property (nonatomic, strong) NSString * sourcePath;
//资源二进制数据
@property (nonatomic, strong) NSData * sourceData;
@end
实现文件————————————————————————————
@interface JRUploadRequest ()
@end
)步骤:1、定义requset 2、定义请求类型 3、定义请求题 4、定义请求头
@implementation JRUploadRequest
//两个初始化方法
+ (JRUploadRequest *)uploadRequestWithPath:(NSString *)path
{
return [[self alloc] initWithPath:path];
}
- (JRUploadRequest *)initWithPath:(NSString *)path
{
if (self = [super init])
{
//设置self
NSURL * url=[NSURL URLWithString:path];
self.URL = url;
self.HTTPMethod = @"POST";
}
return self;
}
//开始上传
- (void)upload
{
//1.定义data
NSMutableData * body=[NSMutableData data];
//2.请求题
//1>拼接开始标志(服务器遇到这个标记就开始解析)("JR"要和请求头中的数据一致)
[body appendData:JREncode(@"--JR\r\n")];
//2>设置服务器接受参数和文件名称(
NSString * filename = [NSString stringWithFormat:@"Content-Disposition: form-data;name=\"file\";filename=\"%@\" \r\n", self.fileName];
[body appendData:JREncode(filename)];
//3>拼接上传的文件类型
NSString * mimeType= [self getMimeType: self.sourcePath];
NSLog(@"======%@",mimeType);
NSString * contentType=[NSString stringWithFormat:@"Content-Type: %@\r\n",mimeType];
[body appendData:JREncode(contentType)];
//4>拼接换行
[body appendData:JREncode(@"\r\n")];
//5>拼接数据
[body appendData:self.sourceData];
//6>拼接换行
[body appendData:JREncode(@"\r\n")];
//7>拼接结束标志
[body appendData:JREncode(@"--JR--\r\n")];
//8>设置请求体
self.HTTPBody=body;
//3.请求头
//1> 设置文件的长度
[self setValue:[NSString stringWithFormat:@"%ld",body.length] forHTTPHeaderField:@"Content-Length"];
//2> 设置类型和开始标志
[self setValue:@"multipart/form-data; boundary=JR" forHTTPHeaderField:@"Content-Type"];
//上传
[NSURLConnection sendAsynchronousRequest:self queue:[NSOperationQueue mainQueue] completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError) {
NSString * str=[[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
NSLog(@"========%@",str);
}];
}
#pragma mark - 获取mimeType
- (NSString * ) getMimeType:(NSString *) path{
//获取本地的URL
NSURL * url=[NSURL fileURLWithPath:path];//不要使用URLWithString这个方法
NSURLRequest * request=[NSURLRequest requestWithURL:url];
NSURLResponse * response=nil;
//不能使用异步方法,因为如果是异步的,返回的字符串是空
[NSURLConnection sendSynchronousRequest:request returningResponse:&response error:nil];
return response.MIMEType;
}
@end