Php 使用Google API和cURL发出批处理请求-不断收到400个错误请求-以下是我的代码：

有点不对劲。我一直收到400个错误请求，但似乎无法收到任何其他错误消息。代码如下：

$locations = array("LAX", "LGW");
$dateOut = '2015-04-25';
$dateIn = '2015-04-29';
$passengers = 1;
$destinations = array("NYC","LAX","CHI","WAS","LAS","SFO","MIA","BOS","DEN","AUS");

$apiQueries = array();
foreach ($destinations as $destination) {
    foreach ($locations as $origin) {
        $data = array("request" => array(
            "passengers" => array(
            "adultCount" => $passengers
        ),
        "slice" => array(
            array(
                "origin" => $origin,
                "destination" => $destination,
                "date" => $dateOut
            ),
            array(
                "origin" => $destination,
                "destination" => $origin,
                "date" => $dateIn
            )
        ),
        "solutions" => "10"
        ));

        $apiQueries[] = json_encode($data);
    }
}

$batch = '';
$boundary = '--batch_xyzabc';
$i = 0;
foreach ($apiQueries as $data) {
    $batch .= "\n" . $boundary . "\nContent-Type: application/http\n\nGET /qpxExpress/v1/trips/search?key=my-unique-key" . " \n" . $data . "\n";
    $i ++ ;
    if ($i > 48){
        // we need to split the batch by packs of <50. Close this one and create the next one
        $batch .= "\n" . $boundary . "\n";
        $batches[] = $batch;
        $batch = '' ;
        $i=0;
    }
}

// close the current batch pack
if ($i > 0) $batches[] = $batch . "\n" . $boundary . "\n";

for ($i = 0 ; $i < count($batches) ; $i++) {
    $session = curl_init('https://www.googleapis.com/batch');
    curl_setopt($session, CURLOPT_POST, true);
    curl_setopt($session, CURLOPT_HTTPHEADER, array('Host: www.googleapis.com', 'Content-Type: multipart/mixed; boundary=' . $boundary, 'Content-Length: ' . strlen( $batches[$i])));
    curl_setopt($session, CURLOPT_POSTFIELDS, $batches[$i]);
    curl_setopt($session, CURLOPT_HEADER, true);
    curl_setopt($session, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($session, CURLOPT_VERBOSE, true);
    curl_setopt($session, CURLINFO_HEADER_OUT, true);
    curl_setopt($session, CURLOPT_SSL_VERIFYPEER, false);

    $resp = curl_exec($session);


    echo $resp;exit; // Shows 400 Bad Request message


    $api_response_info = curl_getinfo($session);
    $pack_of_answers = substr($resp, $api_response_info['header_size']);
    curl_close($session);
}

$locations=数组（“LAX”、“LGW”）；
$dateOut='2015-04-25'；
$dateIn='2015-04-29'；
$乘客=1；
$destinations=数组（“纽约”、“洛杉矶”、“芝加哥”、“华盛顿”、“洛杉矶”、“旧金山”、“迈阿密”、“波士顿”、“丹麦”、“澳大利亚”）；
$apiQueries=array（）；
foreach（$destinations作为$destination）{
foreach（$origin作为$locations）{
$data=数组（“请求”=>数组(
“乘客”=>数组(
“成人计数”=>$乘客
),
“切片”=>数组(
排列(
“origin”=>$origin，
“目的地”=>$destination，
“日期”=>$dateOut
),
排列(
“来源”=>$destination，
“目的地”=>$origin，
“日期”=>$dateIn
)
),
“解决方案”=>“10”
));
$apiQueries[]=json_encode（$data）；
}
}
$batch=''；
$boundary='--batch_xyzabc'；
$i=0；
foreach（$API查询为$data）{
$batch.=“\n.$boundary.\n内容类型：application/http\n\nGET/qpxExpress/v1/trips/search？key=我的唯一密钥”。\n.$data.\n”；
$i++；
如果（$i>48）{
//我们需要将该批按0）$batches[]=$batch.\n“$boundary.\n”的包进行拆分；
对于（$i=0；$i

在PHP中调用Google API（无论是否在应用程序引擎上）的最佳方法是使用