一、解析快手无水印视频链接原理
共分三个步骤:
1.通过视频分享获得视频地址短链接;如:
https://www.kuaishou.com/f/X7tIV0jIivYUyTk
2.通过TNetHTTPClient重定向获得视频地址长链接;如:
https://www.kuaishou.com/short-video/3xvx3jg7ffi3xrs?authorId=3xcjmgxvqvwr65y&streamSource=profile&area=profilexxnull
3.通过地址长链接得到视频ID;如:
本视频的ID为:3xvx3jg7ffi3xrs
4.通过TNetHTTPClient发送一个包含视频ID的post请求。请求成功服务器返回(response)一个包含无水印视频地址,封面,标题等信息的JSON数据;
5.解析response的JSON数据,得到无水印视频地址,就可以下载了。
二、解析无水印视频代码
介绍了原理,废话不多说,直接上代码:
unit uKuaishou;
interface
uses
windows,classes,System.Net.URLClient, System.Net.HttpClient, System.Net.HttpClientComponent,
System.SysUtils,strutils,System.RegularExpressions,system.JSON;
const
wm_user=$0400;
wm_downfile=wm_user+100+1;
//定义UserAgent为计算机操作系统:
USER_AGENT='Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/109.0.0.0 Safari/537.36';
//定义Cookies为你本人的Cookies,可以从浏览器的取得;不懂的+V:byc6352
KUAISHOU_COOKIES='你本人的Cookies';
//这个API_URL为发送post请求的服务器地址:
API_URL='https://video.kuaishou.com/graphql';
//KUAISHOU_ARGS为发送post请求的数据体,其中 photoId为视频唯一ID;
KUAISHOU_ARGS='{"operationName":"visionVideoDetail","variables":{"photoId":"%s","page":"detail","webPageArea":"profilexxnull"},'+
'"query":"query visionVideoDetail($photoId: String, $type: String, $page: String, $webPageArea: String) {visionVideoDetail(photoId: $photoId, type: $type, page: $page, webPageArea: $webPageArea) {photo{id duration timestamp caption coverUrl photoUrl}}}"}';
type
TKuaishou=class(TThread)
private
FId:cardinal; //线程编号;
Furl:string; //视频分享地址(短地址);
FRedirectedUrl:string; //重定向后的地址(长地址);
Fvideourl:string; //解析成功后的视频地址;
FvideoId:string; //视频ID;
Ffilename:string; //保存到本机的视频文件名;
FvideoTitle:string; //视频标题;
FcoverUrl:string; //视频封面地址;
Fmsg:string; //解析成功与否的消息;
class var Fform: HWND; //发送数据到窗体的HWND;
procedure SetId(id:cardinal); //设置线程编号;
class procedure SetForm(const hForm: HWND); static; //设置窗体句柄;
protected
procedure Execute; override;
public
//id:为线程编号;url为视频分享短链接地址;
constructor Create(id:cardinal;url:string);
destructor Destroy;
property id:cardinal read FId write SetId;
property url:string read Furl;
property msg:string read Fmsg;
property filename:string read Ffilename;
property videourl:string read Fvideourl;
property videoTitle:string read FvideoTitle;
property RedirectedUrl:string read FRedirectedUrl;
property videoId:string read FvideoId;
property coverUrl:string read FcoverUrl;
//向服务器发送post请求,返回视频信息的JSON数据;
function getPostResult(data:string):string;
//向服务器发送GET请求,获取重定向长链接地址;
function getRedirectedUrl(url:string):string;
//从长链接解析出视频ID;
function getVideoId(txt:string):string;
//获取无水印视频地址,封面链接,视频标题;
function getVideoUrl():string;
//解析服务器返回的JSON数据
function parseJson(jo:string):string;
class property form: HWND read Fform write SetForm;
end;
implementation
constructor TKuaishou.Create(id:cardinal;url:string);
begin
inherited Create(True);
FId:=id;
Furl:=url;
end;
destructor TKuaishou.Destroy;
begin
inherited Destroy;
end;
//放在线程中执行,不影响主窗体响应;
procedure TKuaishou.Execute;
begin
getVideoUrl();
end;
//获取无水印视频地址,封面链接,视频标题;
function TKuaishou.getVideoUrl():string;
var
args,jo:string;
begin
result:='';
//向服务器发送GET请求,获取重定向长链接地址;
FRedirectedUrl:=getRedirectedUrl(Furl);
if(FRedirectedUrl)='' then exit;
//从长链接解析出视频ID;
FvideoId:=getVideoId(FRedirectedUrl);
if(FvideoId)='' then exit;
//构造post请求的data数据体;
args:=format(KUAISHOU_ARGS,[FvideoId]);
//向服务器发送post请求,获得视频信息的json;
jo:=getPostResult(args);
if(jo)='' then exit;
Fmsg:=jo;
//解析json获取无水印地址;
result:=parseJson(jo);
end;
//解析服务器返回的JSON数据
function TKuaishou.parseJson(jo:string):string;
var
json,j1: TJSONObject;
begin
result:='';
if(pos('errors',jo)>0)then exit;
try
json := TJSONObject.ParseJSONValue(jo) as TJSONObject;
if json = nil then exit;
j1:=json.GetValue('data') as TJSONObject;
j1:=j1.GetValue('visionVideoDetail') as TJSONObject;
j1:=j1.GetValue('photo') as TJSONObject;
FvideoTitle:=j1.GetValue('caption').Value;
FcoverUrl:=j1.GetValue('coverUrl').Value;
FvideoUrl:=j1.GetValue('photoUrl').Value;
result:='#100#'+FvideoUrl+'#'+FcoverUrl+'#'+FvideoTitle;
finally
if json <> nil then json.Free;
end;
end;
//向服务器发送post请求,返回视频信息的JSON数据;
function TKuaishou.getPostResult(data:string):string;
var
client: TNetHTTPClient;
ss,args: TStringStream;
begin
result:='';
try
client := TNetHTTPClient.Create(nil);
SS := TStringStream.Create('', TEncoding.UTF8);
ss.Clear;
args := TStringStream.Create(data, TEncoding.UTF8);
with client do
begin
ConnectionTimeout := 10000; // 10秒
ResponseTimeout := 10000; // 10秒
AcceptCharSet := 'utf-8';
UserAgent := USER_AGENT; //1
client.AllowCookies:=true;
client.HandleRedirects:=true;
Accept:='*/*';
client.ContentType:='application/json'; //2
//这儿写入你电脑的cookies,技术支持:+V:byc6352
client.CustomHeaders['Cookie'] := KUAISHOU_COOKIES;
client.CustomHeaders['Referer'] := Furl;
//发送post请求:
client.Post(API_URL,args,ss);
result:=ss.DataString;
end;
finally
ss.Free;
args.Free;
client.Free;
end;
end;
//向服务器发送GET请求,获取重定向长链接地址;
function TKuaishou.getRedirectedUrl(url:string):string;
var
client: TNetHTTPClient;
ss: TStringStream;
s,id:string;
AResponse:IHTTPResponse;
i:integer;
begin
try
client := TNetHTTPClient.Create(nil);
SS := TStringStream.Create('', TEncoding.UTF8);
ss.Clear;
with client do
begin
ConnectionTimeout := 2000; // 2秒
ResponseTimeout := 2000; // 2秒
AcceptCharSet := 'utf-8';
UserAgent := USER_AGENT;
client.AllowCookies:=true;
client.HandleRedirects:=false; //这儿一定要设置不允许重定向;
Accept:='*/*';
try
AResponse:=Get(url, ss);
s:=AResponse.HeaderValue['Location']; //重定向地址在Location头中;
if(s='')then exit;
result:=s;
except
on E: Exception do
Log(e.Message);
end;
end;
finally
ss.Free;
client.Free;
end;
end;
//从长地址获取视频ID;
function TKuaishou.getVideoId(txt:string):string;
var
m:TMatch;
i:integer;
begin
result:='';
if(length(txt)<15)then exit;
result:=midstr(txt,14,15);
end;
//------------------------------------------属性方法-------------------------------------
procedure TKuaishou.SetId(Id:cardinal);
begin
FId:=Id;
end;
class procedure TKuaishou.SetForm(const hForm: HWND);
begin
Fform:=hForm;
end;
end.
以上类TKuaishou可以直接使用;
三、解析类使用方法:
procedure TfMain.btnParseClick(Sender: TObject);
var
kuaishou:TKuaishou;
url,result:string;
begin
url:=trim(edtUrl.Text);
kuaishou:=TKuaishou.Create(1,url);
//为了演示简单,这儿没有使用线程解析。
result:=kuaishou.getVideoUrl();
if(result='')then
begin
memo1.Text:=kuaishou.msg;
edit3.Text:='';
showmessage('解析失败!');
exit;
end;
//视频连接
edit1.Text:=kuaishou.videourl;
//封面链接
edit2.Text:=kuaishou.coverurl;
edit3.Text:=result;
memo1.Text:=kuaishou.msg;
end;
四、解析程序
1、解析后无水印视频链接地址
https://txmov2.a.kwimgs.com/upic/2023/01/30/05/BMjAyMzAxMzAwNTAwNDZfMjQ2NzExNzg0N185NDk2MTQ0MDk0NF8wXzM=_b_B8055d1d7054f2de85f9bc56e6f73e335.mp4?pkey=AAXY4734ntsAaSz82LuzbXlFNObOF_zOPnH7puUnD1DaNrANsUUAjmGa6Yxz7jAnAszT2e4PdnlBWHxl2dwkhMMGOIZ9qkKliU3yDy_BXQZmJbdV2d6F7_9sEiwpTA9U8gk&tag=1-1675240486-unknown-0-tfsgzikc3z-de39f632a2a7c7cf&clientCacheKey=3xvx3jg7ffi3xrs_b.mp4&di=6a385727&bp=10004&tt=b&ss=vp
2、程序界面:
3、程序下载:
http://helpnow.top/ks
4、另外推荐一款(tubeget高清视频下载器),支持全球1000多个视频站点:
http://helpnow.top/tubeget/