C#使用phantomjs，爬取AJAX加载完成之后的页面

1、开发思路：入参根据apiSetting配置文件，分配静态文件存储地址，可实现不同站点的静态页生成功能。静态页生成功能使用无头浏览器生成，生成之后的字符串进行正则替换为固定地址，实现本地正常访问。

2、已发现问题：如果js在载入页面时进行某些重写dom操作，已用正则替换掉的动态路径代码，会被覆盖，导致本地访问无效。 这一点只能是站点开发那边重新对页面进行优化，从而避免这种情况。 但是这仅影响本地情况，如果静态页面部署到服务器，使用相对路径其实也不会影响。

using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;
using System.Text.RegularExpressions;
using System.Web;
using System.Web.Mvc;

namespace QuartZNetService.Controllers
{
    public class BuildStaticController : Controller
    {
        /// <summary>
        /// 配置地址
        /// </summary>
        public static string jsonUrl = AppDomain.CurrentDomain.BaseDirectory + "apiSetting.json";

        /// <summary>
        /// 网站配置类
        /// </summary>
        public class HttpConfig
        {
            /// <summary>
            /// 网站cookie信息
            /// </summary>
            public string Cookie { get; set; }

            /// <summary>
            /// 页面Referer信息
            /// </summary>
            public string Referer { get; set; }

            /// <summary>
            /// 默认(text/html)
            /// </summary>
            public string ContentType { get; set; }

            public string Accept { get; set; }

            public string AcceptEncoding { get; set; }

            /// <summary>
            /// 超时时间(毫秒)默认100000
            /// </summary>
            public int Timeout { get; set; }

            public string UserAgent { get; set; }

            /// <summary>
            /// POST请求时，数据是否进行gzip压缩
            /// </summary>
            public bool GZipCompress { get; set; }

            public bool KeepAlive { get; set; }

            public string CharacterSet { get; set; }

            public HttpConfig()
            {
                this.Timeout = ;
                this.ContentType = "text/html; charset=" + Encoding.UTF8.WebName;

                this.UserAgent = "Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/60.0.3112.113 Safari/537.36";
                this.Accept = "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8";
                this.AcceptEncoding = "gzip,deflate";
                this.GZipCompress = false;
                this.KeepAlive = true;
                this.CharacterSet = "UTF-8";
            }
        }

        /// <summary>
        /// 利用phantomjs 爬取AJAX加载完成之后的页面
        /// JS脚本刷新时间间隔为3秒，防止页面AJAX请求时间过长导致数据无法获取
        /// </summary>
        /// <param name="url"></param>
        /// <param name="sitId">站点ID 用于配置站点盘符位置</param>
        /// <param name="type">存储文件夹 可为空</param>
        /// <param name="config"></param>
        /// <param name="interval"></param>
        /// <returns></returns>
        public JsonResult Do(string url, string sitId, string typeId, string fileName, HttpConfig config, int interval = )
        {
            try
            {
                var readjson = Readjson(sitId, typeId);
                JObject jo = (JObject)JsonConvert.DeserializeObject(readjson.ToString());
                var sitUrl = jo["url"].ToString();
                var folder = jo["folder"].ToString();

                string path = System.AppDomain.CurrentDomain.BaseDirectory.ToString();
                ProcessStartInfo start = new ProcessStartInfo(path + @"webTools\phantomjs.exe");//设置运行的命令行文件问ping.exe文件，这个文件系统会自己找到
                start.WorkingDirectory = path + @"webTools\";

                //设置命令参数
                string commond = string.Format("{0} {1} {2} {3} {4} {5}", path + @"webTools\codes.js", url, interval, config.UserAgent, config.Accept, config.Referer);
                start.Arguments = commond;
                StringBuilder sb = new StringBuilder();
                start.CreateNoWindow = true;//不显示dos命令行窗口
                start.RedirectStandardOutput = true;//
                start.RedirectStandardInput = true;//
                start.UseShellExecute = false;//是否指定操作系统外壳进程启动程序
                Process p = Process.Start(start);
                StreamReader reader = new StreamReader(p.StandardOutput.BaseStream,Encoding.UTF8);//截取输出流    

                //正则匹配完整外链js
                Regex myreg = new Regex("(http|https)://(?<domain>[^(:|/]*)");
                Match myMatch = myreg.Match(url);
                var reader_txt = reader.ReadToEnd();
                StringBuilder reader_write = new StringBuilder(reader_txt);
                Regex regex = new Regex("<script[^>]*?src=\"([^>]*?)\"[^>]*?>", RegexOptions.IgnoreCase);//正则匹配外链html代码
                MatchCollection userMatchColl = regex.Matches(reader_txt);

                //自定义替换区域 bg
                if (userMatchColl.Count > )
                {
                    foreach (Match matchItem in userMatchColl)
                    {
                        if (reader_write.ToString().IndexOf(matchItem.Value) >  && matchItem.Value.IndexOf("xxx.cn") == -)
                        {
                            reader_write.Insert(
                                (reader_write.ToString().IndexOf(matchItem.Value) + matchItem.Value.IndexOf("src=\"") + ("src=\"").Length),
                                "https://www.xxx.cn"
                                );
                        }
                    }
                }
                reader_write.Replace("src=\"//", "src=\"https://");//增加https
                reader_write.Replace("href=\"//", "href=\"https://");//增加https
                reader_write.Replace("\"//images", "\"https://images");//增加https
                //自定义替换区域 end

                StreamWriter write = new StreamWriter(sitUrl + folder + "//" + fileName, false, Encoding.UTF8);//写入文件
                write.Write(reader_write);
                write.Flush();
                write.Close();
                p.WaitForExit();//等待程序执行完退出进程
                p.Close();//关闭进程
                reader.Close();//关闭流
                return Json(true, JsonRequestBehavior.AllowGet);
            }
            catch (Exception ex)
            {
                return Json(ex.Message, JsonRequestBehavior.AllowGet);
            }
        }

        /// <summary>
        /// 读取配置文件
        /// </summary>
        /// <param name="sitId"></param>
        /// <param name="typeId"></param>
        /// <returns></returns>
        public static string Readjson(string sitId, string typeId)
        {
            string url = "";
            string folder = "";
            using (System.IO.StreamReader file = System.IO.File.OpenText(jsonUrl))
            {
                using (JsonTextReader reader = new JsonTextReader(file))
                {
                    JObject JObject = (JObject)JToken.ReadFrom(reader);
                    //取站点路径
                    var sit = JObject["sit"];
                    foreach (JObject item in sit)
                    {
                        if (item["sitId"].ToString() == sitId)
                        {
                            url = item["sitUrl"].ToString();
                        }
                    }
                    //取文件夹名称 可为空
                    var type = JObject["type"];
                    foreach (JObject item in type)
                    {
                        if (item["typeId"].ToString() == typeId)
                        {
                            folder = item["folder"].ToString();
                        }
                    }
                }
            }
            return JsonConvert.SerializeObject(new
            {
                url = url,
                folder = folder
            });
        }
    }
}

codes.js 配置

var page = require('webpage').create(), system = require('system');
var url = system.args[];
var interval = system.args[];
var settings = {
    timeout: interval,
    encoding: "UTF-8",
    operation: "GET",
    headers: {
        "User-Agent": system.args[],
        "Accept": system.args[],
        "Accept-Language": "zh-CN,en;q=0.7,en-US;q=0.3",
        "Connection": "keep-alive",
        "Upgrade-Insecure-Requests": ,
        "Connection": "keep-alive",
        "Pragma": "no-cache",
        "Cache-Control": "no-cache",
        "Referer": system.args[]
    }
}
page.settings = settings;
page.open(url, function (status) {
    phantom.outputEncoding = "UTF-8";
    if (status !== 'success') {
        console.log('Unable to post!');
        phantom.exit();
    } else {
        setTimeout(function () {
            console.log(page.content);
            phantom.exit();
        }, interval);
    }
});

apiSetting.json 配置

{
    "sit": [
        {
            "sitId": "",
            "sitUrl": "D://"
        },
        {
            "sitId": "",
            "sitUrl": "D://"
        }
    ],
    "type": [
    {
        "typeId": "",
        "folder": "zmPC"
    },
    {
        "typeId": "",
        "folder": "zmCP"
    }
]
}