Question

第一次使用POST

POST信息无法从iPhone进入PhP脚本。我在任何地方都没有错误。 var_dump（$ _ POST）显示为空。登录失败返回。任何想法在哪里看，或者我在这里有一个明显的问题：

     NSURL *url = [NSURL URLWithString:link];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];

NSString *requestBodyString = [NSString stringWithFormat:@"txtuid=%@&txtpwd=%@", userName , password];
NSData *requestBody = [NSData dataWithBytes:[requestBodyString UTF8String]length:[requestBodyString length]];

[request setHTTPMethod:@"POST"];
[request setHTTPBody:requestBody];
[request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"content-type"]; // added from first suggestion

connection = [[NSURLConnection alloc] initWithRequest:request delegate:self startImmediately:YES];

在尝试了六种不同的方式之后，我从previous post获得了修改后的版本。

又一次尝试得到了同样的结果。

NSData *data = [[NSString stringWithFormat: @"txtuid=%@&txtpwd=%@", userName , password] dataUsingEncoding:NSUTF8StringEncoding];

// set up request
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
[request setURL:[NSURL URLWithString:link]];
[request setHTTPMethod:@"POST"];
NSString *boundary = [NSString stringWithString:@"--------------------------------------------------"];
NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@", boundary];
[request addValue:contentType forHTTPHeaderField:@"Content-Type"];

// body
NSMutableData *body = [NSMutableData data];
[body appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithString:@"Content-Type: text/plain\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];  
[body appendData:[NSData dataWithData:data]];
[body appendData:[[NSString stringWithFormat:@"\r\n--%@--\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];  

[request setHTTPBody:body];
connection = [[NSURLConnection alloc] initWithRequest:request delegate:self startImmediately:YES];

Answer 1

有关如何使用POST上传图片的信息，请参阅my answer here。它发布到PHP文件中的表单。发布数据而不上传图像的概念相同，但这是如何使用Objective-C发布到PHP脚本的工作示例。

Answer 2

尽量不要明确设置content-type。避免使用以下行：

[request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"content-type"];

如果您使用的是iPhone模拟器，我强烈建议您使用PROXY进行HTTP调试。 mitmproxy太棒了。并且非常容易在 Mac OS X 上进行设置。

Answer 3

使用以下代码。确保帖子字符串的收据是一个密钥，并将在服务器中使用。客户端代码

 NSString *receipt1 = @"username";

    NSString *post =[NSString stringWithFormat:@"receipt=%@",receipt1];
   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://localhost:8888/validateaction.php"]];
    [request setHTTPMethod:@"POST"];
    [request setValue:postLength forHTTPHeaderField:@"Content-Length"];
    [request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];
    [request setHTTPBody:postData];

    NSHTTPURLResponse* urlResponse = nil;
    NSError *error = [[NSError alloc] init];
    NSData *responseData = [NSURLConnection sendSynchronousRequest:request returningResponse:&urlResponse error:&error];
    NSString *result = [[NSString alloc] initWithData:responseData encoding:NSUTF8StringEncoding];
    NSLog(@"Response Code: %d", [urlResponse statusCode]);

    if ([urlResponse statusCode] >= 200 && [urlResponse statusCode] < 300)
    {
        NSLog(@"Response: %@", result);
    }

}

服务器端php脚本。

validation.php

<?php
 if(_POST)
    {
        if($_POST['receipt'] == 'username')
        {
            echo "post successfull";
         $receipt   = $_POST['key1'];
         echo $receipt;
        }
        else
    {
        echo "not post";
    }
?>

从iPhone到PhP的POST不起作用

3 个答案: