PHP脚本从iPad接收文件的问题

Question

我正在尝试编写一个PHP脚本，该脚本应该接收iPad决定上传的任何文件。然后应将它们保存在正确的文件夹中。但是，每次iPad尝试上传时，都会显示“上传文件时出错”

这是服务器上的代码

<?php

$target_path = "/Library/WebServer/Documents/uploads/";

echo "Target path is: ";
echo $target_path;
echo "\n";

echo "File name is: ";
echo basename($_FILES['userfile']['name']);
echo "\n";

$target_path = $target_path . $_FILES['userfile']['name'];

if (is_uploaded_file($_FILES['userfile']['tmp_name'])) {
    echo "File uploaded OK.";
} else {
    echo "Problem with file upload.";
}

if (move_uploaded_file($_FILES['userfile']['tmp_name'], $target_path)) {
    echo "The file " . basename($_FILES['userfile']['name']) . "has been uploaded";
}
else
{
    echo "Error uploading file. Please try again."; 
}

?>

<?php $target_path = "/Library/WebServer/Documents/uploads/"; echo "Target path is: "; echo $target_path; echo "\n"; echo "File name is: "; echo basename($_FILES['userfile']['name']); echo "\n"; $target_path = $target_path . $_FILES['userfile']['name']; if (is_uploaded_file($_FILES['userfile']['tmp_name'])) { echo "File uploaded OK."; } else { echo "Problem with file upload."; } if (move_uploaded_file($_FILES['userfile']['tmp_name'], $target_path)) { echo "The file " . basename($_FILES['userfile']['name']) . "has been uploaded"; } else { echo "Error uploading file. Please try again."; } ?>

以下是iPad上的代码：

    int length = [postBody length];
NSString* length_str  = [NSString stringWithFormat: @"%d", length];
NSMutableURLRequest *request;
NSData *postData = [postBody dataUsingEncoding:NSASCIIStringEncoding];
NSError* err = nil;
NSURLResponse *response = nil;
NSHTTPURLResponse *httpResponse;
NSData *dataReply;
id stringReply;
urlStr2 = [urlStr mutableCopy];
//[urlStr2 appendString:@"data.txt"];
NSLog(urlStr2);

request = [NSMutableURLRequest requestWithURL: [NSURL URLWithString:urlStr2]];

[request setHTTPMethod: @"POST"];
[request setHTTPBody:postData];
[request setValue:@"text/plain" forHTTPHeaderField:@"Accept"];
[request setValue:@"text/plain" forHTTPHeaderField:@"Content-Type"];
[request setValue:@"Checklist" forHTTPHeaderField:@"User-Agent"];
[request setValue:length_str forHTTPHeaderField:@"Content-Length"];


dataReply = [NSURLConnection sendSynchronousRequest:request
                                  returningResponse:&response error:&err];

if (err)
{
    NSLog(@"There was an error connecting to server.");
}

stringReply = (NSString *)[[NSString alloc] initWithData:dataReply encoding:NSUTF8StringEncoding];

// Some debug code here
httpResponse = (NSHTTPURLResponse *)response;
int statusCode = 0;
if (httpResponse != nil) {
    NSLog(@"HTTP Response Headers %@", [httpResponse allHeaderFields]);
    statusCode = [httpResponse statusCode];
    NSLog(@"HTTP status code: %d", statusCode);
} else {
    NSLog(@"HTTP response is nil.");
}
// End of debug code

[pool release];