通过ftp发送字符串：出错 [英] Sending string via ftp : getting error

问题描述

我尝试使用下面的代码通过ftp发送一个字符串，但是我收到一个错误：

  { 
 
 //其他行代码..... 
 //将购物车的内容转换为属性列表
 [Cart serializeCart]; 
 
 //现在需要将propertyList传输到web服务器
 //第一步是从文档文件夹获取序列化的属性列表
 NSString * pathToSerializedCart = [rootPath stringByAppendingPathComponent：@ serializedCart.plist]; 
 
 NSString * shoppingCartString;如果（！[fileManager fileExistsAtPath：pathToSerializedCart]）
 {
 NSLog（@ERROR：\\\
Couldnt在文档文件夹中查找序列化购物车。）; 
 
。 
} 
 else 
 {
 NSData * serializedData = [NSData dataWithContentsOfFile：pathToSerializedCart]; 
 shoppingCartString = [[NSString alloc] initWithData：serializedData encoding：NSUTF8StringEncoding]; 
} 
 
 NSLog（@％@，shoppingCartString）; 
 //现在将购物车转换为字符串。它准备运输
 NSURL * url = [NSURL URLWithString：@ftp：// username：[e-mail]/folder/serializedCart.xml]; 
 
OOL OK = [shoppingCartString writeToURL：url atomically：NO encoding：NSUTF8StringEncoding error：& error]; 
 if（！OK）{
 NSLog（@错误写入文件％@，错误=％@，url，[error localizedFailureReason]）; 
} 
  

我得到了下面的代码输出：

 写入文件的错误ftp：//用户名：[e-mail]/folder/serializedCart.xml，error =（null）
  

其中一个变量： _domain 最后一行的时候，我在调试期间将鼠标悬停在它上面说 NSCocoaErrorDomain

我不确定如何调试。
有人可以提供任何建议吗？

解决方案

writeToURL：.. 方法不支持 FTP 协议。您将不得不使用其他机制将字符串内容写入ftp服务器。您可以查看诸如 ios-ftp-server 来处理这种上传。您还可以查看 示例代码 来自Apple。

I'm trying to send a string via ftp using the code below but I'm getting an error:

{

    //miscellaneous lines of code.....
    //Convert contents of shopping cart into a property list
    [Cart serializeCart];

    //now need to transport the propertyList to the webserver
    //first step is get the serialized propertylist from the documents folder
    NSString *pathToSerializedCart = [rootPath stringByAppendingPathComponent:@"serializedCart.plist"];

    NSString *shoppingCartString;

   if (![fileManager fileExistsAtPath:pathToSerializedCart])
   {
       NSLog(@"ERROR:\nCouldnt find serialized cart in documents folder.");
   }
   else 
   {
       NSData *serializedData = [NSData            dataWithContentsOfFile:pathToSerializedCart];
       shoppingCartString = [[NSString alloc] initWithData:serializedData encoding:NSUTF8StringEncoding];
   }

   NSLog(@"%@", shoppingCartString);
   //Now that the cart is converted into a string. it is ready for transport
   NSURL *url = [NSURL URLWithString:@"ftp://username:[e-mail]/folder/serializedCart.xml"];

   BOOL OK =[shoppingCartString writeToURL:url atomically:NO encoding:NSUTF8StringEncoding error:&error];   
   if(!OK) {
       NSLog(@"Error writing to file %@ , error = %@", url, [error localizedFailureReason]);
   }

I'm getting the following console output for this code:

Error writing to file ftp://username:[e-mail]/folder/serializedCart.xml , error = (null)

One of the variables: _domain in this error object in the last line when, I mouse over it during debugging says NSCocoaErrorDomain

I'm not sure how to debug this. Could someone give any suggestions?

解决方案

The writeToURL:.. methods don't support the FTP protocol. You'll have to use other mechanisms to write the string content onto an ftp server. You can look at tools such as ios-ftp-server to handle such uploads. You can also look at this sample code from Apple.

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