iOS 用HTTP post上传图片到OSS

唉！都是泪啊 。用惯了AFNetWorking的我这次是被坑了。这次老大非要求使用http自己写上传图片到OSS，搞了两天才搞好，头都大了。应该以后

1. Content-Type: multipart/form-data; boundary=9431149156168

的关于这种的我都会这样写，记录一下。

首先关于post：这儿给个表单，详情点post要求

Post object

请求语法

 
POST / HTTP/1.1 
Host: BucketName.oss-cn-hangzhou.aliyuncs.com
User-Agent: browser_data
Content-Length：ContentLength
Content-Type: multipart/form-data; boundary=9431149156168
--9431149156168
Content-Disposition: form-data; name="key"
key
--9431149156168
Content-Disposition: form-data; name="success_action_redirect"
success_redirect
--9431149156168
Content-Disposition: form-data; name="Content-Disposition"
attachment;filename=oss_download.jpg
--9431149156168
Content-Disposition: form-data; name="x-oss-meta-uuid"
myuuid
--9431149156168
Content-Disposition: form-data; name="x-oss-meta-tag"
mytag
--9431149156168
Content-Disposition: form-data; name="OSSAccessKeyId"
access-key-id
--9431149156168
Content-Disposition: form-data; name="policy"
encoded_policy
--9431149156168
Content-Disposition: form-data; name="Signature"
signature
--9431149156168
Content-Disposition: form-data; name="file"; filename="MyFilename.jpg"
Content-Type: image/jpeg
file_content
--9431149156168
Content-Disposition: form-data; name="submit"
Upload to OSS
--9431149156168--

之前接触这种东西太少了。

转到正题，上代码。

/从后台拿到oss_access_key_id，urlstr，policy，signature
- (void)getAccessTokenFromOSS{
    MySessionManager *manager = [MySessionManager manager];
    NSMutableDictionary *dic = [[NSMutableDictionary alloc]init];
    AppDelegate * appdegate = (AppDelegate *)[UIApplication sharedApplication].delegate;
    [dic setValue:appdegate.access_token        forKey:@"access_token"];
    [dic setValue:@"6000" forKey:@"duration"];
    NSString *url = [NSString stringWithFormat:@"%@/oss_access_token",URL_FACE];
    [manager POST:url parameters:dic success:^(NSURLSessionDataTask * _Nonnull task, id  _Nonnull responseObject) {
        FaceModel *model = [RMMapper objectWithClass:[FaceModel class] fromDictionary:responseObject ];
        [self postOSSImageKeybucketName:model.oss_access_key_id url:model.url policy:model.policy Signature:model.signature];
    } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {
        
    }];
}

#pragma mark--NSURLConnection
- (void)postOSSImageKeybucketName:(NSString *)oss_access_key_id url:(NSString *)urlstr policy:(NSString *)policy Signature:(NSString *)signature{

    if (_currentImg == nil || !_currentImg) {
        return;
    }
    //2. 图片名字
    NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
    NSString * loginMobile = (NSString *) [defaults objectForKey:LOGIN_USERNAME];
    NSString *fileName = [NSString stringWithFormat:@"%@_%@.jpg",loginMobile,[ShareMethod currentTimeStr]];
    //3. 图片二进制文件
    NSData *imagedata = UIImageJPEGRepresentation(_currentImg, 0.00001);
    //4. 发起网络请求
    NSMutableDictionary *dic = [[NSMutableDictionary alloc]init];
    [dic setValue:oss_access_key_id forKey:@"OSSAccessKeyId"];
    [dic setValue:policy            forKey:@"policy"];
    [dic setValue:signature         forKey:@"Signature"];
    [dic setValue:fileName          forKey:@"key"];
    [dic setValue:imagedata         forKey:@"file"];
    [self networkWithURL:urlstr pic:_currentImg parameter:dic fileName:fileName success:^(id obj) {
        NSLog(@"成功");
    } fail:^(NSError *error) {
        NSLog(@"失败");
    }];
}

//图片以及其他信息上传
- (void)networkWithURL:(NSString *)url pic:(UIImage *)image parameter:(NSDictionary *)paraDic fileName:(NSString *)fileName success:(void (^)(id obj))success fail:(void (^)(NSError *error))fail {
    //分界线的标识符
    NSString *TWITTERFON_FORM_BOUNDARY = @"9431149156168";
    //根据url初始化request
    NSMutableURLRequest * request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:url]
                                                            cachePolicy:NSURLRequestReloadIgnoringLocalCacheData
                                                        timeoutInterval:10];
    //分界线 --AaB03x
    NSString *MPboundary=[[NSString alloc]initWithFormat:@"--%@",TWITTERFON_FORM_BOUNDARY];
    //结束符 AaB03x--
    NSString *endMPboundary=[[NSString alloc]initWithFormat:@"%@--",MPboundary];
    //得到图片的data
    NSData *imagedata = UIImageJPEGRepresentation(image, 0.00001);
    //http body的字符串
    NSMutableString *body=[[NSMutableString alloc]init];
    //参数的集合的所有key的集合
    NSArray *keys= [paraDic allKeys];
    //遍历keys
    for(int i=0;i<[keys count];i++)
    {
        //得到当前key
        NSString *key=[keys objectAtIndex:i];
        //如果key不是pic，说明value是字符类型，比如name：Boris
        if (![key isEqualToString:@"file"]) {
            //添加分界线，换行
            [body appendFormat:@"%@\r\n",MPboundary];
            //添加字段名称，换2行
            [body appendFormat:@"Content-Disposition: form-data; name=\"%@\"\r\n\r\n",key];
            //添加字段的值
            [body appendFormat:@"%@\r\n",[paraDic objectForKey:key]];
        }
        
    }
    ////添加分界线，换行
    [body appendFormat:@"%@\r\n",MPboundary];
    //声明pic字段，文件名为boris.png
    [body appendFormat:@"%@", [NSString stringWithFormat:@"Content-Disposition: form-data; name=\"file\"; filename=\"%@.jpg\"\r\n",fileName]];
    //声明上传文件的格式
    [body appendFormat:@"Content-Type: image/jpeg\r\n\r\n"];
    
    //声明结束符：--AaB03x--
    NSString *end=[[NSString alloc]initWithFormat:@"\r\n%@",endMPboundary];
    //声明myRequestData，用来放入http body
    NSMutableData *myRequestData=[NSMutableData data];
    //将body字符串转化为UTF8格式的二进制
    [myRequestData appendData:[body dataUsingEncoding:NSUTF8StringEncoding]];
    //将image的data加入
    [myRequestData appendData:imagedata];
    //加入结束符--AaB03x--
    [myRequestData appendData:[end dataUsingEncoding:NSUTF8StringEncoding]];
    
    //设置HTTPHeader中Content-Type的值
    NSString *content = [[NSString alloc]initWithFormat:@"multipart/form-data; boundary=%@",TWITTERFON_FORM_BOUNDARY];
    //设置HTTPHeader
    [request setValue:content forHTTPHeaderField:@"Content-Type"];
    //设置Content-Length
    [request setValue:[NSString stringWithFormat:@"%d", (int)[myRequestData length]] forHTTPHeaderField:@"Content-Length"];
    //设置http body
    [request setHTTPBody:myRequestData];
    //http method
    [request setHTTPMethod:@"POST"];
    //连接(NSURLSession)
    NSURLSession *session=[NSURLSession sharedSession];
    NSURLSessionDataTask *dataTask=[session dataTaskWithRequest:request completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {
        if (error) {
            NSLog(@"error:%@",error);
            NSLog(@"body%@",response);
            NSLog(@"response:%@",response);
            
        } else {
            NSLog(@"response:%@",response);
        }
        NSString *str = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
        NSLog(@"body:%@", str);
        
    }];
    [dataTask resume];
    
}

欢迎有好方法的朋友补上代码，真的不容易啊，折腾！！

附上参考链接：http://www.superqq.com/blog/2014/12/11/nsmutableurlrequesthe-nsurlconnectionyong-postfang-shi-shang-chuan-zhao-pian/