【LINE Bot】 bluemixとFaceAPIを使った年齢性別推定Bot ref: http://qiita.com/shuheilocale@github/items/da6ecdeced3c00acc6f8

file0.php

// 画像データを取得する
function api_get_message_content_request($message_id) {
    $url = "https://trialbot-api.line.me/v1/bot/message/{$message_id}/content";
    $headers = array(
        "X-Line-ChannelID: {$GLOBALS['CHANNEL_ID']}",
        "X-Line-ChannelSecret: {$GLOBALS['CHANNEL_SECRET']}",
        "X-Line-Trusted-User-With-ACL: {$GLOBALS['MID']}"
    );
    $curl = curl_init($url);
    curl_setopt($curl, CURLOPT_HTTPHEADER, $headers);
    curl_setopt($curl, CURLOPT_HEADER, true);
    curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
    $response = curl_exec($curl);

    $header_size = curl_getinfo($curl, CURLINFO_HEADER_SIZE); 
    $header = substr($response, 0, $header_size);

    $body = substr($response, $header_size);
    error_log("res header::".$header);
    error_log("res body::".$body);
    return array( "header"=>$header, "body"=>$body);
}

file1.php

// （メンバ関数）バイナリデータから顔認証を行う
public function analyze_from_binary($img_binary) {

        $headers = array(
            "Content-Type" => "application/octet-stream"
        );


        $request = new Http_Request2("https://api.projectoxford.ai/face/v0/detections");
        $request->setConfig(array(
            "ssl_verify_peer" => false,
        ));
        $request->setMethod(HTTP_Request2::METHOD_POST);
        $request->setHeader($headers);

        $url = $request->getUrl();
        $url->setQueryVariables($this->query_params);
        if( empty($img_binary)){
            return false;
        }
        $request->setBody($img_binary);
        try
        {
            $response = $request->send();
            $status = $response->getStatus();
            $body_json = json_decode($response->getBody());

            error_log( "resp status::".$response->getStatus() );
            error_log( "resp body::".$response->getBody() );

            if($status != 200){
                if( $status == 400 || $status == 408 || $status == 415 ){
                    return array (
                        "result" => false,
                        "code" => $body_json->{"code"},
                        "message" => $body_json->{"message"}
                    ) ;
                }
                else if( $status == 401 || $status == 403 || $status == 429 ){ 
                    return array (
                        "result" => false,
                        "code" => $body_json->{"statusCode"},
                        "message" => $body_json->{"message"}
                    ) ;                     
                }else{
                    return array (
                        "result" => false,
                        "code" => "unknown",
                        "message" => "unknown error"
                    ) ;
                }
            }

            return array (
                    "result" => true,
                    "faces" => $body_json
            ) ;
        }
        catch (HttpException $ex)
        {
            throw $ex;
        }
    }