我已经在轨道中实现了回形针,正如各种教程所推荐的那样.在尝试上传照片时,我始终如一地获得以下内容:
AWS::S3::NoConnectionEstablished
usr/local/lib/ruby/gems/1.8/gems/aws-s3-0.6.2/lib/aws/s3/connection.rb:213:in `connection'
/usr/local/lib/ruby/gems/1.8/gems/aws-s3-0.6.2/lib/aws/s3/base.rb:69:in `request'
/usr/local/lib/ruby/gems/1.8/gems/aws-s3-0.6.2/lib/aws/s3/base.rb:88:in `put'
/usr/local/lib/ruby/gems/1.8/gems/aws-s3-0.6.2/lib/aws/s3/object.rb:241:in `store'
/Users/joshcutler/code/NiteMob/vendor/plugins/paperclip/lib/paperclip/storage.rb:195:in `flush_writes'
/Users/joshcutler/code/NiteMob/vendor/plugins/paperclip/lib/paperclip/storage.rb:192:in `each'
/Users/joshcutler/code/NiteMob/vendor/plugins/paperclip/lib/paperclip/storage.rb:192:in `flush_writes'
/Users/joshcutler/code/NiteMob/vendor/plugins/paperclip/lib/paperclip/attachment.rb:142:in `save'
/Users/joshcutler/code/NiteMob/vendor/plugins/paperclip/lib/paperclip.rb:331:in `send'
/Users/joshcutler/code/NiteMob/vendor/plugins/paperclip/lib/paperclip.rb:331:in `save_attached_files'
/Users/joshcutler/code/NiteMob/vendor/plugins/paperclip/lib/paperclip.rb:324:in `each_attachment'
/Users/joshcutler/code/NiteMob/vendor/plugins/paperclip/lib/paperclip.rb:323:in `each'
/Users/joshcutler/code/NiteMob/vendor/plugins/paperclip/lib/paperclip.rb:323:in `each_attachment'
/Users/joshcutler/code/NiteMob/vendor/plugins/paperclip/lib/paperclip.rb:330:in `save_attached_files'
/Users/joshcutler/.gem/ruby/1.8/gems/activesupport-2.3.2/lib/active_support/callbacks.rb:178:in `send'
/Users/joshcutler/.gem/ruby/1.8/gems/activesupport-2.3.2/lib/active_support/callbacks.rb:178:in `evaluate_method'
/Users/joshcutler/.gem/ruby/1.8/gems/activesupport-2.3.2/lib/active_support/callbacks.rb:166:in `call'
/Users/joshcutler/.gem/ruby/1.8/gems/activesupport-2.3.2/lib/active_support/callbacks.rb:93:in `run'
/Users/joshcutler/.gem/ruby/1.8/gems/activesupport-2.3.2/lib/active_support/callbacks.rb:92:in `each'
/Users/joshcutler/.gem/ruby/1.8/gems/activesupport-2.3.2/lib/active_support/callbacks.rb:92:in `send'
/Users/joshcutler/.gem/ruby/1.8/gems/activesupport-2.3.2/lib/active_support/callbacks.rb:92:in `run'
/Users/joshcutler/.gem/ruby/1.8/gems/activesupport-2.3.2/lib/active_support/callbacks.rb:276:in `run_callbacks'
/Users/joshcutler/.gem/ruby/1.8/gems/activerecord-2.3.2/lib/active_record/callbacks.rb:344:in `callback'
/Users/joshcutler/.gem/ruby/1.8/gems/activerecord-2.3.2/lib/active_record/callbacks.rb:251:in `create_or_update'
/Users/joshcutler/.gem/ruby/1.8/gems/activerecord-2.3.2/lib/active_record/base.rb:2539:in `save_without_validation'
/Users/joshcutler/.gem/ruby/1.8/gems/activerecord-2.3.2/lib/active_record/validations.rb:1009:in `save_without_dirty'
/Users/joshcutler/.gem/ruby/1.8/gems/activerecord-2.3.2/lib/active_record/dirty.rb:79:in `save_without_transactions'
/Users/joshcutler/.gem/ruby/1.8/gems/activerecord-2.3.2/lib/active_record/transactions.rb:229:in `send'
/Users/joshcutler/.gem/ruby/1.8/gems/activerecord-2.3.2/lib/active_record/transactions.rb:229:in `with_transaction_returning_status'
/Users/joshcutler/.gem/ruby/1.8/gems/activerecord-2.3.2/lib/active_record/connection_adapters/abstract/database_statements.rb:136:in `transaction'
/Users/joshcutler/.gem/ruby/1.8/gems/activerecord-2.3.2/lib/active_record/transactions.rb:182:in `transaction'
/Users/joshcutler/.gem/ruby/1.8/gems/activerecord-2.3.2/lib/active_record/transactions.rb:228:in `with_transaction_returning_status'
/Users/joshcutler/.gem/ruby/1.8/gems/activerecord-2.3.2/lib/active_record/transactions.rb:196:in `save'
/Users/joshcutler/.gem/ruby/1.8/gems/activerecord-2.3.2/lib/active_record/transactions.rb:208:in `rollback_active_record_state!'
/Users/joshcutler/.gem/ruby/1.8/gems/activerecord-2.3.2/lib/active_record/transactions.rb:196:in `save'
/Users/joshcutler/.gem/ruby/1.8/gems/activerecord-2.3.2/lib/active_record/base.rb:2628:in `update_attributes'
这是我的模型声明:
attr_accessor :image_file_name
has_attached_file :image,
:styles …我有两个IList<ICat>,我正在尝试创建一个方法,它需要IList<ICat>一些工作.我试图传递一个IList<PussyCat>或IList<OtherCat>两个,PussyCat并且OtherCat实现,我遇到了问题ICat.
我试过了:
List<PussyCat> cats = ...
DoWork((IList<ICat>)cats);
只是
DoWork(cats);
但是没有编译.有任何想法吗？
我有一个程序,需要在给定的时间间隔内查询数据库,并通过它调用的记录执行一些操作,然后再次更新表.
我正在使用ExecutorService来运行线程,但是我想知道,如果每个线程都有自己的连接(因为它需要更新数据库),或者我可以使用我用来查询初始结果的相同连接吗？
可以连接池工作,我在Oracle 9i上.
以下代码将检索在PHP中使用CURL而不是https检索的URL的正文内容.任何人都可以告诉我如何编辑代码,因为我需要返回的数据不仅仅是标题.
从我在这里做的测试是结果.你可以看到它有内容长度,我只是不知道如何访问它.
谢谢Stephen
错误:0
string(1457)"HTTP/1.1 200 OK日期:星期六,2009年8月1日06:32:11 GMT服务器:Apache/1.3.41(达尔文)PHP/5.2.4 mod_ssl/2.8.31 OpenSSL/0.9.7l缓存 - 控制:max-age = 60到期:周六,2009年8月1日06:33:11 GMT最后修改日期:2006年11月23日星期四17:44:53 GMT ETag:"97d620-44b-4565de15"接受范围:字节内容-Length:1099连接:关闭内容类型:text/html"
<?php
$curl_handle=curl_init();
$username = "";
$password = "";
$fullurl = "http://www.queensberry.com";
$ch = curl_init();
curl_setopt($ch, CURLOPT_HEADER, 1);
curl_setopt($ch, CURLOPT_VERBOSE, 1);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);
curl_setopt($ch, CURLOPT_FAILONERROR, 0);
curl_setopt($ch, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
curl_setopt($ch, CURLOPT_USERPWD, "$username:$password");
curl_setopt($ch, CURLOPT_URL, $fullurl);
$returned = curl_exec($ch);
curl_close ($ch);
var_dump($returned);
?>
我创建了一个Web服务,从客户端调用该服务将数据存储到数据库中.这些数据每隔200毫秒从单个用户发送一次,每次发送数据时,数据库连接都会打开和关闭,我认为这对性能不利.
通过以下方式调用REST.StoreAcceleration()方法和SQLWorks.StoreAcceleration()来存储数据:
public Response StoreAcceleration(string strSessionString, string strMeasurementTime, string strAccelerationX, string strAccelerationY, string strAccelerationZ)
{
SQLWorks sqlWorks = new SQLWorks();
Response response = new Response();
try
{
string strTime = strMeasurementTime.Replace("_", " ");
DateTime measurementTime = DateTime.ParseExact(strTime, "yyyy-MM-dd HH:mm:ss:fff", null);
double accelerationX = Convert.ToDouble(strAccelerationX.Replace(".", ","));
double accelerationY = Convert.ToDouble(strAccelerationY.Replace(".", ","));
double accelerationZ = Convert.ToDouble(strAccelerationZ.Replace(".", ","));
sqlWorks.StoreAcceleration(strSessionString, measurementTime, accelerationX, accelerationY, accelerationZ);
response.Successful = true;
response.Comment = "Stored!";
}
catch(Exception ex)
{
string sDummy = ex.ToString();
response.Comment = "an error occured!";
response.Successful …我有一个带有几列的GridView,我不想将其导出为PDF(通过iTextSharp).
在导出数据之前,如何隐藏我不想导出的列？
我听说可以使用Mandlebrot集的图形来加密数据,并且这种加密算法是量子安全的(与许多常用算法不同,不能用量子计算机来破解).我在Google上查看了更多信息,但我只看到了一些针对更多非技术受众的文章.有没有人有这方面的资料,我可以用它来了解这个有趣的主题？
我一直在阅读Moq的源代码,我遇到了以下单元测试:
Assert.Throws<ArgumentOutOfRangeException>(() => Times.AtLeast(0));
而对于我的生活,我不记得究竟是什么()=>.我认为它与匿名方法或lambda有关.而且我确定我知道它的作用,我现在还记不清了......
有人能给我一个快速回答一个漂亮的noobish问题吗？
经过十年的桌面应用程序开发,我正在进入Web开发领域.我正在尽可能快地学习高级概念,其中一个是MVC.我注意到像javascript,css和html这样的东西不属于M,V或者C.我没有在任何地方明确地读过它,但是我理解MVC模式只用于组织网站服务器端的代码和数据？如果这是一个奇怪的问题我很抱歉,请记住我是个菜鸟!:)
在此先感谢您的帮助!