iPhone开发：使用POST提交表单

Question

我有以下HTML表格：

<form method="post" action="http://shk.ecomd.de/up.php" enctype="multipart/form-data"> 
<input type="hidden" name="id" value="12345" /> 
<input type="file" name="pic" /> 
<input type="submit" /> 
</form> 

而下面的iPhone SDK发布方法：

- (void)sendfile { 
    UIImage *tempImage = [UIImage imageNamed:@"image.jpg"]; 

    NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init]; 
    [request setHTTPMethod:@"POST"]; 
    [request setURL:[NSURL URLWithString:@"http://url..../form.php"]]; 


    NSString *boundary = @"------------0xKhTmLbOuNdArY"; 
    NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@",boundary]; 
    [request addValue:contentType forHTTPHeaderField: @"Content-Type"]; 



    NSMutableData *body = [NSMutableData data]; 
    [body appendData:[[NSString stringWithFormat:@"\r\n%@\r\n",boundary] dataUsingEncoding:NSASCIIStringEncoding]]; 
    [body appendData:[@"Content-Disposition: form-data; name=\"id\"\r\n\r\n" dataUsingEncoding:NSASCIIStringEncoding]]; 
    [body appendData:[@"12345" dataUsingEncoding:NSUTF8StringEncoding]]; 
    [body appendData:[[NSString stringWithFormat:@"\r\n%@\r\n",boundary] dataUsingEncoding:NSASCIIStringEncoding]]; 

    [body appendData:[@"Content-Disposition: form-data; name=\"pic\"; filename=\"photo.png\"\r\n" dataUsingEncoding:NSASCIIStringEncoding]]; 
    [body appendData:[@"Content-Type: application/octet-stream\r\n\r\n" dataUsingEncoding:NSASCIIStringEncoding]]; 
    [body appendData:[NSData dataWithData:UIImageJPEGRepresentation(tempImage, 90)]]; 

    [body appendData:[[NSString stringWithFormat:@"\r\n%@",boundary] dataUsingEncoding:NSASCIIStringEncoding]]; 
    // setting the body of the post to the reqeust 
    [request setHTTPBody:body]; 

    NSError *error; 
    NSURLResponse *response; 
    NSData* result = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error]; 

    NSString* aStr = [[[NSString alloc] initWithData:result encoding:NSASCIIStringEncoding] autorelease]; 

    NSLog(@"Result: %@", aStr); 

    [request release];  
} 

这并不工作，但我不知道为什么。你能帮我么？！！我究竟做错了什么？

Answer 1

下载http://www.charlesproxy.com/

尝试从您的浏览器，并从iPhone模拟器执行相同的POST操作，看到的差异是什么。

Answer 2

您可以设置文件名作为photo.png但使用JPEG数据。可能是这个问题？

Answer 3

<?php 

require_once '__config.php'; 

if ($_FILES) { 
if ($_FILES['pic']['type']=="image/jpeg" && intval($_POST['id'])>0) { 
    copy($_FILES['pic']['tmp_name'],$_SERVER['DOCUMENT_ROOT'].'/u/'.intval($_POST['id']).'.jpg'); 
    $query="update tleistung set bild=1 where id=".intval($_POST['id']); 
    $res=$db->exec($query); 
    die('/u/'.intval($_POST['id']).'.jpg'); 
} 
} 
die("nicht erfolgreich!"); 

?> 

这是PHP代码，我总是得到“nicht erfolgreich！”

和NO：我改变了文件名photo.jpg - 没有改变...

我监视的请求，得到了下面的帖子：

POST /up.php HTTP/1.1 
Host: url... 
User-Agent: iDeXs/0.97 CFNetwork/445.6 Darwin/10.3.0 
Content-Type: multipart/form-data; boundary=------------0xKhTmLbOuNdArY 
Referer: http://url.../up.php 
Content-Length: 380606 
Accept: */* 
Accept-Language: de-de 
Accept-Encoding: gzip, deflate 
Connection: keep-alive 

------------0xKhTmLbOuNdArY 
Content-Disposition: form-data; name="id" 

12345 
------------0xKhTmLbOuNdArY 
Content-Disposition: form-data; name="pic"; filename="photo.jpg" 
Content-Type: image/jpeg 

ˇÿˇ‡ 

Answer 4

它看起来像你的请求缺少终止边界标记。根据RFC 2046，多部分MIME消息的每个部分都需要在边界标记之前。最后一部分需要用最后的边界标记来关闭。最后的边界标记附有“ - ”以表示没有任何部分跟随。试试这个代码：

- (void)sendfile { 
    UIImage *tempImage = [UIImage imageNamed:@"image.jpg"]; 

    NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init]; 
    [request setHTTPMethod:@"POST"]; 
    [request setURL:[NSURL URLWithString:@"http://url..../form.php"]]; 


    NSString *boundary = @"------------0xKhTmLbOuNdArY"; 
    NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@",boundary]; 
    [request addValue:contentType forHTTPHeaderField: @"Content-Type"]; 



    NSMutableData *body = [NSMutableData data]; 
    [body appendData:[[NSString stringWithFormat:@"\r\n%@\r\n",boundary] dataUsingEncoding:NSASCIIStringEncoding]]; 
    [body appendData:[@"Content-Disposition: form-data; name=\"id\"\r\n\r\n" dataUsingEncoding:NSASCIIStringEncoding]]; 
    [body appendData:[@"12345" dataUsingEncoding:NSUTF8StringEncoding]]; 
    [body appendData:[[NSString stringWithFormat:@"\r\n%@\r\n",boundary] dataUsingEncoding:NSASCIIStringEncoding]]; 

    [body appendData:[@"Content-Disposition: form-data; name=\"pic\"; filename=\"photo.png\"\r\n" dataUsingEncoding:NSASCIIStringEncoding]]; 
    [body appendData:[@"Content-Type: application/octet-stream\r\n\r\n" dataUsingEncoding:NSASCIIStringEncoding]]; 
    [body appendData:[NSData dataWithData:UIImageJPEGRepresentation(tempImage, 90)]]; 

    [body appendData:[[NSString stringWithFormat:@"\r\n%@",boundary] dataUsingEncoding:NSASCIIStringEncoding]]; 
    // setting the body of the post to the reqeust 
    [request setHTTPBody:body]; 

    //add terminating boundary marker 
    [body appendData:[[NSString stringWithFormat:@"\r\n%@--",boundary] dataUsingEncoding:NSASCIIStringEncoding]]; 

    NSError *error; 
    NSURLResponse *response; 
    NSData* result = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error]; 

    NSString* aStr = [[[NSString alloc] initWithData:result encoding:NSASCIIStringEncoding] autorelease]; 

    NSLog(@"Result: %@", aStr); 

    [request release];  
}