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function httpRequestGET($url){
  $url2 = parse_url($url);
  $url2["path"] = ($url2["path"] == "" ? "/" : $url2["path"]);
  $url2["port"] = ($url2["port"] == "" ? 80 : $url2["port"]);
  $host_ip = @gethostbyname($url2["host"]);
  $fsock_timeout=20;
  if(($fsock = fsockopen($host_ip, 80, $errno, $errstr, $fsock_timeout)) < 0){
    return false;
  }
  
  $request =  $url2["path"] . ($url2["query"] != "" ? "?" . $url2["query"] : "") . ($url2["fragment"] != "" ? "#" . $url2["fragment"] : "");
  $in  = "GET " . $request . " HTTP/1.0\r\n";
  $in .= "Accept: */*\r\n";
  $in .= "User-Agent: Payb-Agent\r\n";
  $in .= "Host: " . $url2["host"] . "\r\n";
  $in .= "Connection: Close\r\n\r\n";
  if(!@fwrite($fsock, $in, strlen($in))){
    fclose($fsock);
    return false;
  }
  unset($in);
  
  $out = "";
  while($buff = @fgets($fsock, 2048)){
    $out .= $buff;
  }
  fclose($fsock);
  $pos = strpos($out, "\r\n\r\n");
  $head = substr($out, 0, $pos);    //http head
  $status = substr($head, 0, strpos($head, "\r\n"));    //http status line
  $body = substr($out, $pos + 4, strlen($out) - ($pos + 4));//page body
  if(preg_match("/^HTTP\/\d\.\d\s([\d]+)\s.*$/", $status, $matches)){
    if(intval($matches[1]) / 100 == 2){
      return $body;  
    }else{
      return false;
    }
  }else{
    return false;
  }
}
function httpRequestPOST($url,$post_data){
  $url2 = parse_url($url);
  $url2["path"] = ($url2["path"] == "" ? "/" : $url2["path"]);
  $url2["port"] = ($url2["port"] == "" ? 80 : $url2["port"]);
  $host_ip = @gethostbyname($url2["host"]);
  $fsock_timeout=20;//秒
  if(($fsock = fsockopen($host_ip, 80, $errno, $errstr, $fsock_timeout)) < 0){
    return false;
  }
  
  $request =  $url2["path"] . ($url2["query"] != "" ? "?" . $url2["query"] : "") . ($url2["fragment"] != "" ? "#" . $url2["fragment"] : "");
  
  $needChar = false;
  
  foreach($post_data as $key => $val)  {
    
    $post_data2 .= ($needChar ? "&" : "") . urlencode($key) . "=" . urlencode($val);
    $needChar = true;
  }
  $in  = "POST " . $request . " HTTP/1.0\r\n";
  $in .= "Accept: */*\r\n";
  $in .= "Host: " . $url2["host"] . "\r\n";
  $in .= "User-Agent: Lowell-Agent\r\n";
  $in .= "Content-type: application/x-www-form-urlencoded\r\n";
  $in .= "Content-Length: " . strlen($post_data2) . "\r\n";
  $in .= "Connection: Close\r\n\r\n";
  $in .= $post_data2 . "\r\n\r\n";
  
  unset($post_data2);
  if(!@fwrite($fsock, $in, strlen($in))){
    fclose($fsock);
    return false;
  }
  unset($in);
  
  $out = "";
  while($buff = fgets($fsock, 2048)){
    $out .= $buff;
  }
  
  fclose($fsock);
  $pos = strpos($out, "\r\n\r\n");
  $head = substr($out, 0, $pos);    //http head
  $status = substr($head, 0, strpos($head, "\r\n"));    //http status line
  $body = substr($out, $pos + 4, strlen($out) - ($pos + 4));//page body
  if(preg_match("/^HTTP\/\d\.\d\s([\d]+)\s.*$/", $status, $matches)){
    if(intval($matches[1]) / 100 == 2){
      return $body;
    }else{
      return false;
    }
  }else{
    return false;
  }
}

$post_data = array("name"=>"xd","sex"=>"man");
httpRequestPOST("http://localhost/post.php",$post_data);

POST /post.php HTTP/1.0
Accept: */*
Host: localhost
User-Agent: Lowell-Agent
Content-type: application/x-www-form-urlencoded
Content-Length: 15
Connection: Close
name=xd&sex=man

POST/?username=111&password=222HTTP/1.1
Host:127.0.0.1:8000
User-Agent:Mozilla/5.0(Windows;U;WindowsNT5.2;zh-CN;rv:1.9.0.1)Gecko/2008070208Firefox/3.0.1
Accept:text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language:zh-cn,zh;q=0.5
Accept-Encoding:gzip,deflate
Accept-Charset:gb2312,utf-8;q=0.7,*;q=0.7
Keep-Alive:300
Connection:keep-alive
Referer:http://127.0.0.1:8000/?username=111&password=222
Content-Type:application/x-www-form-urlencoded
Content-Length:25
username=111&password=222

GET/?username=111&password=222HTTP/1.1
Host:127.0.0.1:8000
User-Agent:Mozilla/5.0(Windows;U;WindowsNT5.2;zh-CN;rv:1.9.0.1)Gecko/2008070208Firefox/3.0.1
Accept:text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language:zh-cn,zh;q=0.5
Accept-Encoding:gzip,deflate
Accept-Charset:gb2312,utf-8;q=0.7,*;q=0.7
Keep-Alive:300
Connection:keep-alive
Referer:http://127.0.0.1:8000/?username=1&password=2

POST/?username=111&password=222HTTP/1.1
Host:127.0.0.1:8000
User-Agent:Mozilla/5.0(Windows;U;WindowsNT5.2;zh-CN;rv:1.9.0.1)Gecko/2008070208Firefox/3.0.1
Accept:text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language:zh-cn,zh;q=0.5
Accept-Encoding:gzip,deflate
Accept-Charset:gb2312,utf-8;q=0.7,*;q=0.7
Keep-Alive:300
Connection:keep-alive
Referer:http://127.0.0.1:8000/?username=111&password=222
Content-Type:multipart/form-data;boundary=---------------------------23757983230932
Content-Length:1704
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Content-Disposition:form-data;name="phototitle"
12
-----------------------------23757983230932
Content-Disposition:form-data;name="photo";filename="技术考核题.txt"
Content-Type:text/plain
技术考核
本次是个编程题，题目选Java/语言进行回答。
问题描述：
假设你的爱好是集邮。目前总共有N种不同的邮票，编号为从0到N-1.每种邮票的价钱被定义在数组int[]prices中(序号从0开始，数组的第i个元素表示第i种邮票的价格)。
你的目标是收集尽可能多种的邮票。你当前拥有的邮票存储在int[]have这个数组中。初始时，你没有钱，但是你可以卖掉已有邮票来买不同的邮票。返回你能收集到的不同种邮票的最大数量。
定义：
class:PostmarksCollection
method:numberOfDistinctPostmarks
Parameters:int[],int[]
Returns:int
Methodsignature:publicintnumberOfDistinctPostmarks(int[]prices,int[]have)
//为了进行测试，必须保证是public
约束：
1）N从1到50
2）prices中的元素数量刚好是N个元素
3）prices中的元素的值，从1到1,000,000
4）have中的元素数量是0个到N个
5）have中的每个元素是不同的
6）have中的每个元素的值是从0到N-1.
例如：
1）
{13,10,14,20}
{3,0,2,1}
Returns:4
你已经拥有所有种类的邮票。
2）
{7,5,9,7}
{}
Returns:0
你开始没有任何邮票，所以你也不能组任何事情。
3）
{4,13,9,1,5}
{1,3,2}
Returns:4
卖掉邮票2，买入邮票0和4,(邮票2的价钱是9，邮票0的价钱是4，邮票4的价钱是5，卖掉2刚好买入0和4）
4）
{16,32,13,2,17,10,8,8,20,17}
{7,0,4,1,6,8}
Returns:8
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使用Java请在此处答题（请使用JDK5.0编译，编译不能通过者不计算分数）
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