这是我的第一个问题:)
我真的需要一些服务器和 PHP 方面的帮助。这是问题:
我有一个 NSMutableURLRequest 与这样的 php 文件交互:
NSInteger userID = 4;
NSString * logInString = [NSString stringWithFormat:@"id=%i&mode=HARD", userID];
NSData * logInData = [logInString dataUsingEncoding:NSUTF8StringEncoding allowLossyConversion:YES];
NSString *postLength = [NSString stringWithFormat:@"%d", [logInData length]];
NSMutableURLRequest * logInRequest = [[NSMutableURLRequest alloc] initWithURL:[NSURL URLWithString:@"http://myurl.lol/login.php"]];
[logInRequest setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];
[logInRequest setValue:postLength forHTTPHeaderField:@"Content-Length"];
[logInRequest setHTTPMethod:@"POST"];
[logInRequest setHTTPBody:logInData];
[NSURLConnection sendAsynchronousRequest:logInRequest queue:[[NSOperationQueue alloc] init] completionHandler:^(NSURLResponse *response, NSData *data, NSError *error) {
if ([data length] >0 && error == nil) {
NSString * responseString = [NSString stringWithUTF8String:data.bytes];
NSLog(@"%@", responseString);
[self performSelectorOnMainThread:@selector(responseWasReceived:) withObject:responseString waitUntilDone:YES];
}
else if ([data length] == 0 && error == nil) {
[self performSelectorOnMainThread:@selector(didNotReceivedResponse) withObject:nil waitUntilDone:YES];
}
else if (error != nil) {
[self performSelectorOnMainThread:@selector(errorDidOccurred) withObject:nil waitUntilDone:YES];
NSLog(@"Error = %@", error);
}
}];
我的 PHP 是这样的:
include("database.php");
if ($_REQUEST['mode'] == 'HARD') {
$query = mysql_query('SELECT COUNT(*) as total FROM users WHERE id = "' . $_REQUEST['id'] . '"');
$fetch_username = mysql_fetch_object($query);
$usernames_coincidences = $fetch_username -> total;
if ($usernames_coincidences == 1) {
exit("ACCESS GRANTED");
} else {
exit("USER DOES NOT EXIST");
}
}
我应该收到“ACCESS GRANTED”字符串,有时它会发生,但有时我会收到错误的响应,如“ACCESS GRANTED¿”或“ACCESS GRANTEDOL”。
有什么问题?您认为我应该在方法中使用同步请求并使用 performSelector:inBackground: 执行它吗?
最佳答案
您正在尝试使用不一定以 NULL 结尾的原始数据构造 responseString
。
取而代之的是:
[NSString stringWithUTF8String:data.bytes];
改用这个:
[[NSString alloc] initWithBytes:data.bytes length:data.length encoding:NSUTF8StringEncoding];
请注意,我没有考虑您是否使用 ARC。您的原始调用产生了一个自动释放的值;我的没有;确保不会漏水。
关于php - 如何在不收到错误响应的情况下与 ObjectiveC 中的服务器进行交互?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/13997455/