从 iPhone 同步服务器上的数据时出现超时问题

Posted 2023-03-04

【中文标题】从 iPhone 同步服务器上的数据时出现超时问题

【英文标题】：Having time out problem at time sync the data on the server from iPhone

【发布时间】：2011-09-07 11:01:04

【问题描述】：

我正在尝试将数据从 iPhone 同步到服务器，但没有得到它。在过去的四天里，我曾经这样做过，但现在没有任何成功。它显示

** 连接失败！错误 - 请求超时。 http://192.168.0.68:91/JMAPI?RequestType=User&Command=NEW ** -[NSConcreteMutableData release]：消息发送到 deallocated 实例 0x165590a0

我的服务器是在 C# 的帮助下创建的 我有这样的本地服务器链接http://192.168.0.68:91/JMAPI 为了发布我这样编码的数据

    -(void)sendRequest

    

        NSDate* date = [NSDate date];
        //Create the dateformatter object
        NSDateFormatter* formatter = [[[NSDateFormatter alloc] init] autorelease];
        //Set the required date format
        [formatter setDateFormat:@"yyyy-MM-dd HH:MM:SS"];
        //Get the string date
        NSString* str = [formatter stringFromDate:date];

        NSString *post = [NSString stringWithFormat:@"Token=%@&JourneyID=%@&JourneyName=%@&Locationname=%@&StartDate=%@&Distance=%@&ShareType=%@&LastSyncDate=%@",tokenapi,Journey_ID,Journey_Name,Location_Name,Start_Date,Dist,Share_type,str];
        NSLog(@"%@",post);
        NSData *postData = [post dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES]; 
        NSString *postLength = [NSString stringWithFormat:@"%d", [postData length]]; 
        NSLog(@"%@",postLength);
        NSMutableURLRequest *request = [[[NSMutableURLRequest alloc] init]autorelease]; 
        [request setURL:[NSURL URLWithString:@"http://192.168.0.68:91/JMAPI?RequestType=User&Command=NEW"]]; 
        [request setHTTPMethod:@"POST"]; 
        [request setValue:postLength forHTTPHeaderField:@"Content-Length"]; 
        [request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"]; 
        [request setHTTPBody:postData];

        NSURLConnection *theConnection = [[NSURLConnection alloc] initWithRequest:request delegate:self];

        if (theConnection) 
            webData = [[NSMutableData data] retain];
            NSLog(@"%@",webData);

        

    
/// this for checking is that Sync is work or not 

-(void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response 
   
    [webData setLength: 0]; 
 

-(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data 
         
    [webData appendData:data]; 

 

-(void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error 
     
    [connection release];  
    [webData release]; 
    NSLog(@"Connection failed! Error - %@ %@",
          [error localizedDescription],
          [[error userInfo] objectForKey:NSURLErrorFailingURLStringErrorKey]);
***//ABove line i am getting error that Connection failed! Error - The request timed out.
    http://192.168.0.68:91/JMAPI?RequestType=User&Command=NEW*** 

 

-(void)connectionDidFinishLoading:(NSURLConnection *)connection 
      
    NSString *loginStatus = [[NSString alloc] initWithBytes: [webData mutableBytes] length:[webData length] encoding:NSUTF8StringEncoding]; 
    NSLog(@"%@",loginStatus);  
    [loginStatus release];           
    [connection release];  
    [webData release]; 
 


And i am getting this data from sqlitedatabase and from here i am calling the -(void)sendRequest Which is containing   posting method . For code like this 

    -(void)information
    
        NSString *filePath = [self getWritableDBPath];

        sqlite3 *database;
        if(sqlite3_open([filePath UTF8String], &database) == SQLITE_OK)
        
            NSString *qu = @"Select  JourneyID,JourneyName,Locationname,StartDate,Distance,ShareType FROM UserJourney where SyncStatus ='1'";
            sqlite3_stmt *compiledStatement;
            if(sqlite3_prepare_v2(database, [qu UTF8String], -1, &compiledStatement, NULL) == SQLITE_OK) 
            



                while(sqlite3_step(compiledStatement) == SQLITE_ROW ) 
                

                    char *firstColumn = (char *)sqlite3_column_text(compiledStatement, 0);
                    Journey_ID= [[NSString alloc]initWithUTF8String:firstColumn];
                    NSLog(@"%@",Journey_ID);
                    char * scondColumn = (char *)sqlite3_column_text(compiledStatement, 1);
                    Journey_Name = [[NSString alloc]initWithUTF8String:scondColumn];
                    NSLog(@"%@",Journey_Name);
                    char *thridColumn = (char *)sqlite3_column_text(compiledStatement, 2);
                    Location_Name =[[NSString alloc]initWithUTF8String:thridColumn];
                    NSLog(@"%@",Location_Name);
                    char *fuothColumn = (char *)sqlite3_column_text(compiledStatement, 3);
                    Start_Date = [[NSString alloc]initWithUTF8String:fuothColumn];
                    NSLog(@"%@",Start_Date);
                    Dist = [NSNumber numberWithFloat:(float)sqlite3_column_double(compiledStatement, 4)];
                    NSLog(@"%f",Dist);
                    Share_type = [NSNumber numberWithInt:(int)sqlite3_column_int(compiledStatement, 5)];
                    NSLog(@"%f",Share_type);
                    NSLog(@"%@,%@,%@,%@,%@",Journey_ID,Journey_Name,Location_Name,Start_Date,Dist,Share_type);

    [self sendRequest];***// this is place from where I call the posting method(sendRequest)***

    
        
        sqlite3_finalize(compiledStatement);
    
    sqlite3_close(database);

希望尽快得到帮助 谢谢

【问题讨论】：

打开 NSZombie 并通过 Instruments 进行测试。它将帮助您找到双重释放的对象。

从浏览器检查 URL 192.168.0.68:91/JMAPI?RequestType=User&Command=NEW 是否正常工作或超时。

【参考方案1】：

这里有两个问题。

(1) 超时 - 看起来你没有连接到 192.168.9.68:91 的任何东西 - @Mahesh 的评论是正确的；在模拟器浏览器的 Safari 中检查它，以检查您是否可以连接到该机器。

(2) 这个比较严重。

您正在为 sqlite 结果集中的每一行调用[self sendRequest]。但是，您所有的请求都共享同一个 webData 对象:(

您需要创建一个包含sendRequest 和webData 的单独类，并为您要发送的每个请求创建一个实例。

【讨论】：

我如何发送每个数据的请求。它会使我的程序变慢吗。如果让洞数据从同一页面发送到服务器会有什么不同

(1) 让每个数据都有自己的'webData'对象，否则发送的每一位数据的响应将相互覆盖。 (2) 否 - NSURLConnection 足够聪明，不会建立太多连接，并且大部分时间都花在等待服务器响应的后台线程中。 (3) 您可以一次性发送所有数据 - 这样会更快（需要建立的连接更少）并且可以修复您的“webData”错误 - 但是，在服务器上要做的工作更多。