iPhone用NSURLConnection发送POST

Question

我在使用NSURLConnection将POST数据发送到PHP脚本时遇到了一些问题.这是我的代码:

    const char *bytes = [[NSString stringWithFormat:@"<?xml version=\"1.0\"?>\n<mydata>%@</mydata>", data] UTF8String];

    NSURL *url = [NSURL URLWithString:@"http://myurl.com/script.php"];
    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];

    [request setHTTPMethod:@"POST"];
    [request setHTTPBody:[NSData dataWithBytes:bytes length:strlen(bytes)]];

    NSURLResponse *response;
    NSError *err;
    NSData *responseData = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&err];
    NSLog(@"responseData: %@", responseData);

而我的script.php就像这样简单:

<?php
    echo $_POST['mydata'];
?>

这在过去对我NSLog(@"responseData: %@", responseData);有用,但由于某种原因,我从现在得到的输出只是"<>"而不是"theData".

可能在某处有些蹩脚的错误,但我似乎无法找到它？有任何想法吗？

Answer 1

你的数据有误.如果您希望在PHP的$ _POST数组中找到数据,它应该如下所示:

const char *bytes = "mydata=Hello%20World";

如果要发送XML数据,则需要设置不同的HTTP内容类型.你可能会设置

application/xml; charset=utf-8

如果未设置HTTP内容类型,则为默认类型

application/x-www-form-urlencoded

将会被使用.此类型要求POST数据具有与GET请求中相同的格式.

但是,如果您设置不同的HTTP内容类型(如application/xml),则此数据不会添加到PHP中的$ _POST数组中.您必须从输入流中读取原始数据.

试试这个:

NSString * str = [NSString stringWithFormat:@"<?xml version=\"1.0\"?>\n<mydata>%@</mydata>", data];
[request setHTTPMethod:@"POST"];
[request setValue:@"application/xml; charset=utf-8" forHTTPHeaderField:@"Content-Type"];
[request setHTTPBody:[str dataUsingEncoding:NSUTF8StringEncoding]];

并在服务器上尝试以下PHP:

$handle = fopen("php://input", "rb");
$http_raw_post_data = '';
while (!feof($handle)) {
    $http_raw_post_data .= fread($handle, 8192);
}
fclose($handle);

请注意,这仅适用于POST的HTTP标头不是application/x-www-form-urlencoded.如果它是application/x-www-form-urlencoded,则PHP本身会读取所有后期数据,对其进行解码(将其拆分为键/值对),最后将其添加到$ _POST数组中.

Answer 2

啊耶...干杯 但是responseData输出就像"<48656c6c 6f326f72 6c64>",你不用%@打印NSData吗？ - per_pilot 2010年1月15日13:57

那是因为你显示"字节"值,你应该将它传递给NSString以查看真实的消息

NSString *string = [[NSString alloc] initWithData:responseData encoding:NSASCIIStringEncoding];
NSLog(@"responseData: %@", string);

Answer 3

NSString *post =[NSString stringWithFormat:@"usertype(%@),loginname(%@),password(%@)",txtuser.text,txtusername.text,txtpassword.text];
NSData *postData = [post dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES];
NSString *postLength = [NSString stringWithFormat:@"%d", [postData length]];

NSMutableURLRequest *request = [[[NSMutableURLRequest alloc] init] autorelease];
[request setURL:[NSURL URLWithString:@"http://www.dacinci.com/app/tes2/login_verify.php"]];
[request setHTTPMethod:@"POST"];
[request setValue:postLength forHTTPHeaderField:@"Content-Length"];
[request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];
[request setHTTPBody:postData];

NSError *error;
NSURLResponse *response;
NSData *urlData=[NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];
NSString *str=[[NSString alloc]initWithData:urlData encoding:NSUTF8StringEncoding];