一、c# WebView2簡介
? 1.一開始使用WebBrowser，因為WebBrowser控件使用的是ie內(nèi)核，經(jīng)過修改注冊表切換為Edge內(nèi)核后，
發(fā)現(xiàn)Edge內(nèi)核版本較低，加載一些視頻網(wǎng)站提示“瀏覽器版本過低“，”視頻無法加載“。
2.WebBrowser內(nèi)核版本與WebView2比較
WebBrowser內(nèi)核版本：
內(nèi)核版本 (Version) Edge 18.9200 兼容 WebKit 537.36 ?Chrome 70?
UserAgent: Mozilla/5.0 (Windows NT 6.2; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.102 Safari/537.36 Edge/18.9200
當(dāng)前Edge內(nèi)核版本：
內(nèi)核版本 (Version)?? ?WebKit 537.36 ?Chrome 111.0.0.0
UserAgent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/111.0.0.0 Safari/537.36 Edg/111.0.1661.54
WebView2內(nèi)核版本：
內(nèi)核版本 (Version)?? ?WebKit 537.36 ?Chrome 111.0.0.0
UserAgent:Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/111.0.0.0 Safari/537.36 Edg/111.0.1661.51
可見，WebView2內(nèi)核版本跟Edge一樣，能順利打開視頻網(wǎng)站。WebBrowser內(nèi)核版本過低。
WebView2加載視頻網(wǎng)站
3.WebView2概述
? Microsoft Edge WebView2 控件允許在本機應(yīng)用中嵌入 web 技術(shù)(HTML、CSS 以及 JavaScript)。 WebView2 控件使用 Microsoft Edge 作為繪制引擎，以在本機應(yīng)用中顯示 web 內(nèi)容。
雖說無法跨平臺，但是在windows應(yīng)用下做為原瀏覽器控件替代品還是不錯的。
4.安裝webview2
? ?打開NuGet，搜索WebView2，安裝之后，可以看到左側(cè)就有了webview2控件，可以直接拖到窗體內(nèi)。
二、問題分析
1、關(guān)于登陸會話的問題
網(wǎng)頁端必須打開小紅書網(wǎng)站。小紅書打開后，在瀏覽器Cookie里，有一個字段：
web_session=040069b3b3f6625dade26f8d1d364b44f72186
這是記錄登陸會話信息的。請求時headers中需要x-s、x-t，cookie中需要有web_session。
經(jīng)測試，這個web_session會在瀏覽器保存一段時間，具體多久還有待驗證（B站也有個類似的session，是一個月）。其它字段無關(guān)緊要。
不使用WebView2打開網(wǎng)站的話，需要到網(wǎng)站申請web_session，這里WebView2已經(jīng)替我們弄好了。
通過c# WebView2獲取cookie信息的方法：
private Dictionary<string, string> mCookies = new Dictionary<string, string>();//保存Cookie到字典中
/// <summary>
/// WebView2異步獲取cookie
/// </summary>
/// <param name="url">與cookie關(guān)聯(lián)的域名</param>
private async void getCookie(string url)
{
List<CoreWebView2Cookie> cookieList = await webView.CoreWebView2.CookieManager.GetCookiesAsync(url);
mCookies.Clear();
for (int i = 0; i < cookieList.Count; ++i)
{
CoreWebView2Cookie cookie = webView.CoreWebView2.CookieManager.CreateCookieWithSystemNetCookie(cookieList[i].ToSystemNetCookie());
mCookies.Add(cookie.Name, cookie.Value);
}
}
/// <summary>
/// 提取cookie中的一個字段；
/// </summary>
/// <param name="url">域名</param>
/// <param name="key">關(guān)鍵字，如：web_session</param>
/// <param name="t">延時（沒用到）</param>
/// <returns></returns>
public string getCookieEx(string url, string key, int t)
{
getCookie(url);
if (mCookies.ContainsKey(key))
{
string cookies = "";
foreach (var cookie in mCookies)
{
cookies += cookie.Key + "=" + cookie.Value + ";";
}
cookies = key + "=" + mCookies[key];
return cookies;
}
return null;
}2.筆記信息接口
目前筆記信息接口： /api/sns/web/v1/feed
請求時headers中需要x-s、x-t，cookie中需要有web_session。
3.X-S
定位方法很多，可以全局搜 "X-s" 。往上找可以發(fā)現(xiàn)該段為 sign 方法，function sign(e, t) {}
全部復(fù)制到本地，然后根據(jù)報錯把缺的方法和環(huán)境補一下，比如a0_0x4dee00、a0_0x5c27、a0_0x543e等方法，
然后把常用的navigator、location、document、window加上就好了。
該過程中根據(jù)具體錯誤再調(diào)試分析， 比如sign方法的 case "6"，修改為var vr = window 、在case "7"中可以手動修改為 dr = ur['sNYMU']
這里已經(jīng)拿到了function sign(e, t) {}的JavaScript版，需要的+v:byc6352
三.解析原理及流程
? 1、獲取小紅書筆記分享鏈接
Meta發(fā)布了一篇小紅書筆記，快來看吧！ ?? 95mtho0hHhZLd1q ?? http://xhslink.com/AKXMyp，復(fù)制本條信息，打開【小紅書】App查看精彩內(nèi)容！
? 2、執(zhí)行url重定向得到帶來note_id的新鏈接
https://www.xiaohongshu.com/discovery/item/6430e99c00000000140259d3?app_platform=android&app_version=7.83.0&share_from_user_hidden=true&type=video&xhsshare=CopyLink&appuid=640d1628000000001400dc4d&apptime=1682740972
? 3、解析出note_id
note_id=6430e99c00000000140259d3
? 4、調(diào)用JavaScript function sign(e, t) 簽名得到X-s，X-t
X-t: 1682742221056
X-s: Ogsb02Zv0gUJO2w6OB4UOjTl1g9CsBT+Oj9W0gsK1g13
? 5、發(fā)送post請求：
? ?(1)數(shù)據(jù)：
var args = '{\"source_note_id\":\"' + note_id + '\"}';
? (2)請求頭(不會的+v:byc6352):
//JavaScript代碼：
var headers = 'X-t: ' + o['X-t'] + '\r\nX-s: ' + o['X-s'] + '\r\nContent-Type: application/json;charset=UTF-8\r\nReferer: https://www.xiaohongshu.com/\r\nCookie: ' + cookie;?
? (3)服務(wù)器接口：
//JavaScript代碼：
var api_url = 'https://edith.xiaohongshu.com/api/sns/web/v1/feed';
? (4)發(fā)送post：
//JavaScript代碼：
var data = winning.getPostResult(api_url, args, headers);
? (5)得到筆記信息數(shù)據(jù)(json)：
{"msg":"成功","data":{"cursor_score":"","items":[{"id":"6430e99c00000000140259d3","model_type":"note","note_card":{"at_user_list":[],"last_update_time":1680927132000,"title":"幻晝#治愈系風(fēng)景","desc":"","user":{"user_id":"62c7b52a000000000303fdb4","nickname":"Meta","avatar":"https://sns-avatar-qc.xhscdn.com/avatar/62c7de8013ab526ecfbf1777.jpg"},"interact_info":{"share_count":"1","followed":false,"liked":false,"liked_count":"3","collected":false,"collected_count":"2","comment_count":"0"},"image_list":[{"file_id":"4e8ce0b1-ba6f-83bf-646b-bf8fea89341f","height":1280,"width":720,"url":"https://sns-img-hw.xhscdn.com/4e8ce0b1-ba6f-83bf-646b-bf8fea89341f","trace_id":"217/0/01e430e94079052e00100001875f0f3462_0.jpg"}],"tag_list":[],"time":1680927132000,"ip_location":"云南","note_id":"6430e99c00000000140259d3","share_info":{"un_share":false},"type":"video","video":{"media":{"video_id":136287668638655138,"video":{"drm_type":0,"stream_types":[259],"biz_name":110,"biz_id":"280402856711969235","duration":257,"md5":"5bb4036b378ab014d2114784bc147f10","hdr_type":0},"stream":{"h265":[],"av1":[],"h264":[{"audio_duration":250729,"master_url":"http://sns-video-hw.xhscdn.com/stream/110/259/01e430e99c7922a201037003875f169774_259.mp4","vmaf":-1,"stream_desc":"WM_X264_MP4","duration":256800,"size":68608344,"fps":30,"psnr":0,"ssim":0,"quality_type":"HD","height":1280,"avg_bitrate":2137331,"default_stream":0,"width":720,"video_duration":256800,"audio_bitrate":64035,"audio_channels":2,"backup_urls":["http://sns-video-bd.xhscdn.com/stream/110/259/01e430e99c7922a201037003875f169774_259.mp4","http://sns-video-qc.xhscdn.com/stream/110/259/01e430e99c7922a201037003875f169774_259.mp4?sign=6c5ffdf48d9c842405bb3e3a5fa361e7&t=644e8f54","http://sns-video-al.xhscdn.com/stream/110/259/01e430e99c7922a201037003875f169774_259.mp4"],"stream_type":259,"format":"mp4","volume":0,"video_codec":"h264","hdr_type":0,"rotate":0,"video_bitrate":2068304,"audio_codec":"aac","weight":62}]}},"image":{"thumbnail_fileid":"110/0/01e430e99c7922a200100001875f111ff3_0.webp"},"capa":{"duration":256},"consumer":{"origin_video_key":"spectrum/1000g2f02adqphsqh20005om7mkl0vvdklvh95l8"}}}}],"current_time":1682743347282},"code":0,"success":true}
? 6、解析筆記信息數(shù)據(jù)(json):
? 如果data.items[i].note_card.type='video' 說明該筆記為視頻內(nèi)容；
? 如果data.items[i].note_card.type='normal' 說明該筆記為圖文內(nèi)容；
? 7、一張圖看懂無水印視頻、無水印封面所在位置：
? PHOTO_HOST='https://sns-img-hw.xhscdn.com/'; ?//無水印封面服務(wù)器
? VIDEO_HOST='http://sns-video-bd.xhscdn.com/'; ?//無水印視頻服務(wù)器
?
四、WebView2中C#和JavaScript代碼互操作
?1.需要創(chuàng)建一個ScriptHost對象，并注冊到WebView2中：
/// <summary>
/// 網(wǎng)頁調(diào)用C#方法
/// </summary>
[ClassInterface(ClassInterfaceType.AutoDual)]
[ComVisible(true)]
public class ScriptHost2.在WebView2初始化完成事件中注冊ScriptHost對象
/// <summary>
/// CoreWebView2初始化完成
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void webView_CoreWebView2InitializationCompleted(object sender, CoreWebView2InitializationCompletedEventArgs e)
{
//注冊winning，winasync腳本c#互操作
webView.CoreWebView2.AddHostObjectToScript("scriptHost", scriptHost);
//注冊全局變量winning 同步操作；winasync:異步操作；
webView.CoreWebView2.AddScriptToExecuteOnDocumentCreatedAsync("var winasync= window.chrome.webview.hostObjects.scriptHost;");
webView.CoreWebView2.AddScriptToExecuteOnDocumentCreatedAsync("var winning= window.chrome.webview.hostObjects.sync.scriptHost;");
}3.ScriptHost中暴露的公共方法，都可以在前端JavaScript中調(diào)用。
/// <summary>
/// 日志記錄（JavaScript前端調(diào)用
/// </summary>
/// <param name="message">JavaScript前端信息</param>
public void log(string message)
{
Log.i(message);//記錄到文本文件中
//MessageBox.Show(message);
}
..............................................
winning.log(data);//JavaScript端調(diào)用(同步調(diào)用)；五、下載封面及視頻
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net.Configuration;
using System.Text;
using System.Threading.Tasks;
namespace XhsVideo
{
/// <summary>
/// 下載視頻
/// </summary>
internal class VideoDown
{
public int id { get; set; }
public VideoInfo video { get; set; }
public string savedir { get; set; }
public string msg { get; set; }
public bool success { get; set; }
public string headers { get; set; }
public VideoDown(int id,VideoInfo video,string savdir,string headers=null) {
this.id = id;
this.video = video;
this.savedir = savdir;
if (System.IO.Directory.Exists(savdir)) System.IO.Directory.CreateDirectory(savdir);
this.headers = headers;
}
public void process()
{
string filename = MakeValidFileName( video.title,""); //去除文件名中的非法字符
string videoname = savedir + "\\" + filename + ".mp4";
string covername = savedir + "\\" + filename + ".webp";
if (System.IO.File.Exists(covername)) System.IO.File.Delete(covername);
if (System.IO.File.Exists(videoname)) System.IO.File.Delete(videoname);
Log.i(videoname);
Log.i(covername);
//NetHelper.downloadfileAsync(video.videoUrl, videoname);
NetHelper.downloadfileAsync(video.coverUrl, covername);
NetHelper.DownloadFileAsync(video.videoUrl, videoname, showProgress);//顯示下載視頻的進度
}
/**
* @param text: 原始串
* @param replacement: 要替換的字符串
*/
public static string MakeValidFileName(string text, string replacement = "_")
{
StringBuilder str = new StringBuilder();
var invalidFileNameChars = System.IO.Path.GetInvalidFileNameChars();
foreach (var c in text)
{
if (invalidFileNameChars.Contains(c))
{
str.Append(replacement ?? "");
}
else
{
str.Append(c);
}
}
return str.ToString();
}
/// <summary>
/// 下載視頻的進度回調(diào)函數(shù)
/// </summary>
/// <param name="msg">下載進度信息</param>
public void showProgress(string msg)
{
this.msg = msg;
Log.i(msg);
fMainForm.GetFMainForm().syncContext.Send(fMainForm.GetFMainForm().SetTextSafePost, this);//Post 將信息發(fā)送到窗體顯示
}
}
/// <summary>
/// 視頻信息類，由：標(biāo)題，封面地址，視頻地址組成。
/// </summary>
public class VideoInfo
{
public string title { get; set; }
public string coverUrl { get; set; }
public string videoUrl { get; set; }
public VideoInfo(string title,string coverUrl,string videoUrl)
{
this.title = title;
this.coverUrl = coverUrl;
this.videoUrl = videoUrl;
}
}
}六、日志記錄
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace XhsVideo
{
/// <summary>
/// 日志記錄 到文本文件
/// </summary>
internal class Log
{
private static Log log;
private static string logName;
private Log(string filename) {
logName = filename;
}
public static Log GetLog(string filename)
{
if (log == null) { log = new Log(filename); }
return log;
}
public static Log GetLog()
{
return log;
}
public static void i(string msg)
{
string now = DateTime.Now.ToString();
string[] text = new string[2];
text[0] = now;
text[1] = msg;
try
{
using (StreamWriter sw = new StreamWriter(logName,true,Encoding.UTF8))
{
foreach (string s in text)
{
sw.WriteLine(s);
}
sw.Close();
}
}
catch (Exception e)
{
//Console.WriteLine("Exception: " + e.Message);
}
finally
{
//Console.WriteLine("Executing finally block.");
}
}
}
}七、網(wǎng)絡(luò)訪問組件
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net.Http.Headers;
using System.Net.Http;
using System.Text;
using System.Threading.Tasks;
using System.Net;
using System.IO;
using System.Windows.Forms;
namespace XhsVideo
{
/// <summary>
/// 網(wǎng)絡(luò)訪問組件
/// </summary>
internal class NetHelper
{
#region 文件下載
/// <summary>
/// 下載文件
/// </summary>
/// <param name="url">文件下載地址</param>
/// <param name="savePath">本地保存路徑+名稱</param>
/// <param name="downloadCallBack">下載回調(diào)（總長度,已下載,進度）</param>
/// <returns></returns>
/// <exception cref="Exception"></exception>
public static async Task DownloadFileAsync(string url, string savePath, Action<string> downloadCallBack = null)
{
try
{
downloadCallBack?.Invoke($"文件【{url}】開始下載！");
HttpResponseMessage response = null;
using (HttpClient client = new HttpClient())
response = await client.GetAsync(url);
if (response == null)
{
downloadCallBack?.Invoke("文件獲取失敗");
return;
}
var total = response.Content.Headers.ContentLength ?? 0;
var stream = await response.Content.ReadAsStreamAsync();
var file = new FileInfo(savePath);
using (var fileStream = file.Create())
using (stream)
{
if (downloadCallBack == null)
{
await stream.CopyToAsync(fileStream);
downloadCallBack?.Invoke($"文件【{url}】下載完成！");
}
else
{
byte[] buffer = new byte[1024];
long readLength = 0;
int length;
double temp = 0;
string msg = "";
while ((length = await stream.ReadAsync(buffer, 0, buffer.Length)) != 0)
{
// 寫入到文件
fileStream.Write(buffer, 0, length);
//更新進度
readLength += length;
double progress = Math.Round((double)readLength / total * 100, 2, MidpointRounding.AwayFromZero);//.ToZero
if ((progress % 1) == 0 && (progress % 1) != temp)
{
msg = $"總大?。骸緖total}】，已下載：【{readLength}】,進度：【{progress}】";
downloadCallBack?.Invoke(msg);
}
temp = progress % 1;
//下載完畢立刻關(guān)閉釋放文件流
if (total == readLength && progress == 100)
{
fileStream.Close();
fileStream.Dispose();
msg = $"總大小：【{total}】，已下載：【{readLength}】,進度：【{progress}】下載完成。";
downloadCallBack?.Invoke(msg);
}
}
}
}
}
catch (Exception ex)
{
downloadCallBack?.Invoke($"下載文件失敗：{ex.Message}!");
}
}
#endregion
/// <summary>
/// 異步下載文件
/// </summary>
/// <param name="url"></param>
/// <param name="filename"></param>
public static async void downloadfileAsync(string url,string filename)
{
using (var web = new WebClient())
{
await web.DownloadFileTaskAsync(url, filename);
}
}
/// <summary>
/// 地址重定向
/// </summary>
/// <param name="url">原地址</param>
/// <param name="domain">域名</param>
/// <param name="ua">userAgent</param>
/// <returns>重定向后的地址</returns>
public static string getRedirectedUrl(string url, string domain, string ua)
{
var str = getRedirectedUrl_T(url);
return str.Result;
}
/// <summary>
/// 異步地址重定向
/// </summary>
/// <param name="url"></param>
/// <returns></returns>
private static async Task<string> getRedirectedUrl_T(string url)
{
try
{
var handler = new HttpClientHandler()
{
AllowAutoRedirect = false
};
var client = new HttpClient(handler);
var response = await client.GetAsync(url).ConfigureAwait(continueOnCapturedContext: false);
int statuscode = (int)response.StatusCode;
if (statuscode == 307)
{
string location = response.Headers.Location.ToString();
return location;
}
if (statuscode == 302)
{
string location = response.Headers.Location.ToString();
return location;
}
else
{
return "";
}
}
catch (Exception e)
{
System.Diagnostics.Debug.WriteLine("getRedirectedUrl_T：" + e.ToString());
return "";
}
}
//---------------------------------------------------------------post---------------------------------------------------------------------
/// <summary>
/// Post訪問
/// </summary>
/// <param name="url">訪問地址</param>
/// <param name="args">數(shù)據(jù)</param>
/// <param name="headers">HTTP頭</param>
/// <returns>返回服務(wù)器JSON數(shù)據(jù)</returns>
public static string getPostResult(string url, string args, string headers)
{
var str = getPostResult_T(url, args, headers);
return str.Result;
}
/// <summary>
/// 異步post調(diào)用
/// </summary>
/// <param name="url"></param>
/// <param name="args"></param>
/// <param name="headers"></param>
/// <returns></returns>
private static async Task<string> getPostResult_T(string url, string args, string headers)
{
try
{
var handler = new HttpClientHandler() { UseCookies = false };
var client = new HttpClient(handler);// { BaseAddress = baseAddress };
client.Timeout = TimeSpan.FromSeconds(20);
var message = new HttpRequestMessage(HttpMethod.Post, url);
message.Content = new StringContent(args);
message.Content.Headers.ContentType = new MediaTypeHeaderValue("application/json");
//message.Headers;
Dictionary<string, string> dictionary = ParseToDictionary(headers);
foreach (var pair in dictionary)
{
if (pair.Key.Equals("content-type")) continue;
if (pair.Key.Equals("Content-Type")) continue;
message.Headers.Add(pair.Key, pair.Value);
}
var result = await client.SendAsync(message).ConfigureAwait(continueOnCapturedContext: false);
result.EnsureSuccessStatusCode();
return await result.Content.ReadAsStringAsync();
}
catch (Exception e)
{
//EventLog.GetEventLogs(e.ToString);
System.Diagnostics.Debug.WriteLine("getPostResultEx_T：" + e.ToString());
///console.write(e.ToString());
return "";
}
}
/// <summary>
/// 字符串解析為字典數(shù)據(jù)
/// </summary>
/// <param name="str">以回車換行符分割的字符串</param>
/// <returns>字典數(shù)據(jù)</returns>
private static Dictionary<string, string> ParseToDictionary(string str)
{
Dictionary<string, string> result = new Dictionary<string, string>();
string str1 = str;
int i = str1.IndexOf("\r\n");
int j = 0;
while (i > 0)
{
string str2 = str1.Substring(0, i);
j = str2.IndexOf(":");
if (j > 0)
{
string str21 = str2.Substring(0, j);
string str22 = str2.Substring(j + 1);
result.Add(str21, str22);
}
str1 = str1.Substring(i + 2);
i = str1.IndexOf("\r\n");
}
j = str1.IndexOf(":");
if (j > 0)
{
string str21 = str1.Substring(0, j);
string str22 = str1.Substring(j + 1);
result.Add(str21, str22);
}
return result;
}
//-------------------------------------------------------------------GET -------------------------------------------------------------------
/// <summary>
/// 獲取服務(wù)器端的HTML代碼
/// </summary>
/// <param name="url"></param>
/// <returns></returns>
public static string getHtmlCode(string url)
{
var str = getHtmlCode_T(url);
return str.Result;
}
/// <summary>
/// 異步獲取服務(wù)器端的HTML代碼
/// </summary>
/// <param name="url"></param>
/// <returns></returns>
public static async Task<string> getHtmlCode_T(string url)
{
try
{
var http = new HttpClient();
http.Timeout = TimeSpan.FromSeconds(10);
var result = await http.GetStringAsync(url).ConfigureAwait(continueOnCapturedContext: false);
return result;
}
catch (Exception e)
{
//EventLog.GetEventLogs(e.ToString);
System.Diagnostics.Debug.WriteLine("錯誤信息在這兒：" + e.ToString());
///console.write(e.ToString());
Log.i(e.ToString());
return "";
}
}
}
}
八、ScriptHost與JavaScript交互(主要流程）：
using Microsoft.Web.WebView2.Core;
using Microsoft.Web.WebView2.WinForms;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using static System.Windows.Forms.VisualStyles.VisualStyleElement;
using System.Threading;
using System.Security.Policy;
using System.Net.Http;
using System.Net.Http.Headers;
namespace XhsVideo
{
/// <summary>
/// 網(wǎng)頁調(diào)用C#方法
/// </summary>
[ClassInterface(ClassInterfaceType.AutoDual)]
[ComVisible(true)]
public class ScriptHost
{
private WebView2 webView;
private Dictionary<string, string> mCookies = new Dictionary<string, string>();//保存Cookie到字典中
private string mUrl;
public static ScriptHost scriptHost = null;
private ScriptHost(WebView2 webView)
{
scriptHost = this;
this.webView = webView;
//注冊事件偵聽，加載頁面完成時，獲取cookie；
this.webView.NavigationCompleted += new System.EventHandler<Microsoft.Web.WebView2.Core.CoreWebView2NavigationCompletedEventArgs>(this.webView_NavigationCompleted);
//webView初始化完成后注冊與JavaScript交互
this.webView.CoreWebView2InitializationCompleted += new System.EventHandler<Microsoft.Web.WebView2.Core.CoreWebView2InitializationCompletedEventArgs>(this.webView_CoreWebView2InitializationCompleted);
}
public static ScriptHost GetScriptHost(WebView2 webView)
{
if (scriptHost == null) scriptHost = new ScriptHost(webView);
return scriptHost;
}
/// <summary>
/// 日志記錄（JavaScript前端調(diào)用
/// </summary>
/// <param name="message">JavaScript前端信息</param>
public void log(string message)
{
Log.i(message);//記錄到文本文件中
//MessageBox.Show(message);
}
/// <summary>
/// 提取cookie中的一個字段；
/// </summary>
/// <param name="url">域名</param>
/// <param name="key">關(guān)鍵字，如：web_session</param>
/// <param name="t">延時（沒用到）</param>
/// <returns></returns>
public string getCookieEx(string url, string key, int t)
{
getCookie(url);
if (mCookies.ContainsKey(key))
{
string cookies = "";
foreach (var cookie in mCookies)
{
cookies += cookie.Key + "=" + cookie.Value + ";";
}
cookies = key + "=" + mCookies[key];
//cookies = "web_session=040069b3b3f6625dade26f8d1d364b44f72186";
return cookies;
}
return null;
}
/// <summary>
/// WebView2異步獲取cookie
/// </summary>
/// <param name="url">與cookie關(guān)聯(lián)的域名</param>
private async void getCookie(string url)
{
List<CoreWebView2Cookie> cookieList = await webView.CoreWebView2.CookieManager.GetCookiesAsync(url);
mCookies.Clear();
for (int i = 0; i < cookieList.Count; ++i)
{
CoreWebView2Cookie cookie = webView.CoreWebView2.CookieManager.CreateCookieWithSystemNetCookie(cookieList[i].ToSystemNetCookie());
mCookies.Add(cookie.Name, cookie.Value);
}
}
/// <summary>
/// 解析并下載由JavaScript返回的信息
/// </summary>
/// <param name="text"></param>
public void getJsResult(string text)
{
Log.i(text);
string temp = text;
string[] ss = text.Split(',');
string title = "";
string coverUrl = "";
string videoUrl = "";
string origin_video_key = "";
string trace_id = "";
int id = 0;
foreach (string s in ss)
{
string[] dd = s.Split('=');
if (dd.Length == 2)
{
if (dd[0].Equals("title")) title = dd[1];
if (dd[0].Equals("cover_url")) coverUrl = dd[1];
if (dd[0].Equals("video_url")) videoUrl = dd[1];
if (dd[0].Equals("origin_video_key")) origin_video_key = dd[1];
if (dd[0].Equals("trace_id")) trace_id = dd[1];
if (dd[0].Equals("id")) id = int.Parse(dd[1]);
}
}
videoUrl = "http://sns-video-hw.xhscdn.com/" + origin_video_key;//無水印視頻
coverUrl = "https://sns-img-qc.xhscdn.com/" + trace_id;//無水印封面
VideoInfo video = new VideoInfo(title, coverUrl, videoUrl);//創(chuàng)建視頻信息對象
VideoDown videodown=new VideoDown(id, video, Config.savedir);//創(chuàng)建視頻下載對象
videodown.process();//執(zhí)行下載
}
//---------------------------------------------------------socket--------------------------------------------------------------------------------
/// <summary>
/// 重定向鏈接，該方法由JavaScript調(diào)用；
/// </summary>
/// <param name="url"></param>
/// <param name="domain"></param>
/// <param name="ua"></param>
/// <returns></returns>
public string getRedirectedUrl(string url, string domain, string ua)
{
return NetHelper.getRedirectedUrl(url, domain, ua);
}
/// <summary>
/// 提交post請求，該方法由JavaScript調(diào)用；
/// </summary>
/// <param name="url"></param>
/// <param name="args"></param>
/// <param name="headers"></param>
/// <returns></returns>
public string getPostResultEx(string url, string args, string headers)
{
return NetHelper.getPostResult(url, args, headers);
}
//-----------------------------------------------------------事件---------------------------------------------------------------------------
/// <summary>
/// 加載完頁面時，獲取cookie
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void webView_NavigationCompleted(object sender, CoreWebView2NavigationCompletedEventArgs e)
{
string url = webView.Source.Host.ToString();
url = "https://" + url;
getCookie(url);
}
/// <summary>
/// CoreWebView2初始化完成
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void webView_CoreWebView2InitializationCompleted(object sender, CoreWebView2InitializationCompletedEventArgs e)
{
//注冊winning，winasync腳本c#互操作
webView.CoreWebView2.AddHostObjectToScript("scriptHost", scriptHost);
//注冊全局變量winning 同步操作；winasync:異步操作；
webView.CoreWebView2.AddScriptToExecuteOnDocumentCreatedAsync("var winasync= window.chrome.webview.hostObjects.scriptHost;");
webView.CoreWebView2.AddScriptToExecuteOnDocumentCreatedAsync("var winning= window.chrome.webview.hostObjects.sync.scriptHost;");
}
}
}因為涉及的技術(shù)知識點太多了，后續(xù)繼續(xù)完善下載無水印圖文。文章來源：http://www.zghlxwxcb.cn/news/detail-447281.html
? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?(未完待續(xù)）文章來源地址http://www.zghlxwxcb.cn/news/detail-447281.html
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