動態提交使用jQuery 完成ajax 文件下載----后端php

1、js代碼

// Ajax 文件下載

//當不用傳參時，可以將data去掉

jQuery.download = function(url, data, method){ // 獲得url和data
    if( url && data ){
        // data 是 string 或者 array/object
        data = typeof data == 'string' ? data : jQuery.param(data); // 把參數組裝成 form的 input
        var inputs = '';
        jQuery.each(data.split('&'), function(){
            var pair = this.split('=');
            inputs+='<input type="hidden" name="'+ pair[0] +'" value="'+ pair[1] +'" />';
        }); // request發送請求
        jQuery('<form action="'+ url +'" method="'+ (method||'post') +'">'+inputs+'</form>').appendTo('body').submit().remove();
    };
};

 

調用實例：

$.download('ExcelDownload.do','find=commoncode','post' );

 

2、php代碼

/**
 * 下載文件
 * @param string $file
 *               被下載文件的路徑
 * @param string $name
 *               用戶看到的文件名
 */
public function download(){
    $file = "D:\\cloudwafSites.txt";
    $name = 'test';
    $fileName = $name ? $name : pathinfo($file,PATHINFO_FILENAME);
    $filePath = realpath($file);

    $fp = fopen($filePath,'rb');

    if(!$filePath || !$fp){
        header('HTTP/1.1 404 Not Found');
        echo "Error: 404 Not Found.(server file path error)";
        exit;
    }

    $fileName = $fileName .'.'. pathinfo($filePath,PATHINFO_EXTENSION);
    $encoded_filename = urlencode($fileName);
    $encoded_filename = str_replace("+", "%20", $encoded_filename);

    header('HTTP/1.1 200 OK');
    header( "Pragma: public" );
    header( "Expires: 0" );
    header("Content-type: application/octet-stream");
    header("Content-Length: ".filesize($filePath));
    header("Accept-Ranges: bytes");
    header("Accept-Length: ".filesize($filePath));

    $ua = $_SERVER["HTTP_USER_AGENT"];
    if (preg_match("/MSIE/", $ua)) {
        header('Content-Disposition: attachment; filename="' . $encoded_filename . '"');
    } else if (preg_match("/Firefox/", $ua)) {
        header('Content-Disposition: attachment; filename*="utf8\'\'' . $fileName . '"');
    } else {
        header('Content-Disposition: attachment; filename="' . $fileName . '"');
    }

    //ob_end_clean(); //<--有些情況可能需要調用此函數
    // 輸出文件內容
    fpassthru($fp);
    exit;
}