Question

我是亚马逊s3的新手，我正在尝试使用预先签名的url上传图像到我的s3存储桶。它显示我访问被拒绝。我的网址格式是

https://bucketname.s3.amazonaws.com/imagename.jpeg&AWSAccessKeyId=XXXX&Expires=XXXX&Signature=XXXX

我在互联网上搜索并发现签名网址不需要上传存储桶策略，因此我没有创建任何存储桶策略。

我在python中编写了一段代码：

   class PreSignImage(Resource):

    results = fields.DictField(attribute='aws_string')
    class Meta:
        object_class=FeedObject
        allowed_methods = ['get']
        always_return_data = True
        authentication = Authentication()
        serializer = Serializer(formats=['json'])
        authorization = Authorization()
        include_resource_uri=False
        resource_name = 'upload_image'
        always_return_data = True
    def get_object_list(self, bundle):
        results = list()
        file_name=bundle.request.GET['file_name']
        file_type=bundle.request.GET['file_type']

        s3=boto3.client('s3',aws_access_key_id=settings.AWS_ACCESS_KEY,aws_secret_access_key=settings.AWS_SECRET_KEY)
        presigned_post = s3.generate_presigned_post(Bucket = settings.S3_BUCKET,
                                                    Key = file_name,
                                                    Fields = {"acl": "public-read", "Content-Type": file_type},
                                                    Conditions = [
                                                                    {"acl": "public-read"},
                                                                    {"Content-Type": file_type}
                                                                ],
                                                    ExpiresIn = 36000
                                                    )
        screenobj = FeedObject()
        screenobj.aws_string=presigned_post
        results.append(screenobj)
        #data=json.dumps({'data': presigned_post,'url': 'https://%s.s3.amazonaws.com/%s' % (settings.S3_BUCKET, file_name)})
        #response=HttpResponse(content=data,status=200,content_type="application/json;")
        #response['Content-Length']=len(data)
        return results

尝试从ios应用上传图片：

-(void) uploadImage:(UIImage *)image atUrl:(NSString *)url withMimeType:(NSString *)mimeType {
    NSData *imageData = UIImageJPEGRepresentation(image, 0.1);
    NSURL *requestURL = [NSURL URLWithString:url];
    AFHTTPSessionManager *client = [[AFHTTPSessionManager alloc] initWithBaseURL:requestURL];
    client.requestSerializer=[AFJSONResponseSerializer serializer];
    NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
    [request setHTTPMethod:@"PUT"];
    [request setValue:mimeType forHTTPHeaderField:@"Content-Type"];
    [request setHTTPBody:imageData];
    [request setValue:[NSString stringWithFormat:@"%lu", (unsigned long)[imageData length]] forHTTPHeaderField:@"Content-Length"];
    [request setValue:@"public-read" forHTTPHeaderField:@"x-amz-acl"];
    [request setURL:requestURL];

    NSURLSessionDataTask *task = [client dataTaskWithRequest:request completionHandler:^(NSURLResponse *response, id responseObject, NSError *error) {
        if (error) {
            NSLog(@"Error: %@", error);
        } else {
            NSLog(@"%@ %@", response, responseObject);
        }
    }];
    [task resume];
}

过去2天仍然无法将图像上传到我的存储桶中。请帮忙

预签名网址的s3存储桶策略

0 个答案: