tytd-cli-cpp/main.cpp

/*
    A Command Line YouTube Downloader in C++
    Copyright (C) 2024 Mike Nolan

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <https://www.gnu.org/licenses/>.

*/
#include <jansson.h>
#include <string>
#include <curl/curl.h>
#include <regex>
#include <iostream>
#include <filesystem>
#include <unistd.h>

const char* license = "                    GNU GENERAL PUBLIC LICENSE\n"
"                       Version 3, 29 June 2007\n"
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"patent against the party.\n"
"\n"
"  If you convey a covered work, knowingly relying on a patent license,\n"
"and the Corresponding Source of the work is not available for anyone\n"
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"available, or (2) arrange to deprive yourself of the benefit of the\n"
"patent license for this particular work, or (3) arrange, in a manner\n"
"consistent with the requirements of this License, to extend the patent\n"
"license to downstream recipients.  \"Knowingly relying\" means you have\n"
"actual knowledge that, but for the patent license, your conveying the\n"
"covered work in a country, or your recipient's use of the covered work\n"
"in a country, would infringe one or more identifiable patents in that\n"
"country that you have reason to believe are valid.\n"
"\n"
"  If, pursuant to or in connection with a single transaction or\n"
"arrangement, you convey, or propagate by procuring conveyance of, a\n"
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"or convey a specific copy of the covered work, then the patent license\n"
"you grant is automatically extended to all recipients of the covered\n"
"work and works based on it.\n"
"\n"
"  A patent license is \"discriminatory\" if it does not include within\n"
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"conditioned on the non-exercise of one or more of the rights that are\n"
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"work if you are a party to an arrangement with a third party that is\n"
"in the business of distributing software, under which you make payment\n"
"to the third party based on the extent of your activity of conveying\n"
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"patent license (a) in connection with copies of the covered work\n"
"conveyed by you (or copies made from those copies), or (b) primarily\n"
"for and in connection with specific products or compilations that\n"
"contain the covered work, unless you entered into that arrangement,\n"
"or that patent license was granted, prior to 28 March 2007.\n"
"\n"
"  Nothing in this License shall be construed as excluding or limiting\n"
"any implied license or other defenses to infringement that may\n"
"otherwise be available to you under applicable patent law.\n"
"\n"
"  12. No Surrender of Others' Freedom.\n"
"\n"
"  If conditions are imposed on you (whether by court order, agreement or\n"
"otherwise) that contradict the conditions of this License, they do not\n"
"excuse you from the conditions of this License.  If you cannot convey a\n"
"covered work so as to satisfy simultaneously your obligations under this\n"
"License and any other pertinent obligations, then as a consequence you may\n"
"not convey it at all.  For example, if you agree to terms that obligate you\n"
"to collect a royalty for further conveying from those to whom you convey\n"
"the Program, the only way you could satisfy both those terms and this\n"
"License would be to refrain entirely from conveying the Program.\n"
"\n"
"  13. Use with the GNU Affero General Public License.\n"
"\n"
"  Notwithstanding any other provision of this License, you have\n"
"permission to link or combine any covered work with a work licensed\n"
"under version 3 of the GNU Affero General Public License into a single\n"
"combined work, and to convey the resulting work.  The terms of this\n"
"License will continue to apply to the part which is the covered work,\n"
"but the special requirements of the GNU Affero General Public License,\n"
"section 13, concerning interaction through a network will apply to the\n"
"combination as such.\n"
"\n"
"  14. Revised Versions of this License.\n"
"\n"
"  The Free Software Foundation may publish revised and/or new versions of\n"
"the GNU General Public License from time to time.  Such new versions will\n"
"be similar in spirit to the present version, but may differ in detail to\n"
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"\n"
"  Each version is given a distinguishing version number.  If the\n"
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"Public License \"or any later version\" applies to it, you have the\n"
"option of following the terms and conditions either of that numbered\n"
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"\n"
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"versions of the GNU General Public License can be used, that proxy's\n"
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"to choose that version for the Program.\n"
"\n"
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"\n"
"  15. Disclaimer of Warranty.\n"
"\n"
"  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY\n"
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"  17. Interpretation of Sections 15 and 16.\n"
"\n"
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"reviewing courts shall apply local law that most closely approximates\n"
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"Program, unless a warranty or assumption of liability accompanies a\n"
"copy of the Program in return for a fee.\n"
"\n"
"                     END OF TERMS AND CONDITIONS\n";
using namespace std;
class VideoId {
    private:
        std::string id;
        bool hasId=false;
        bool IsValid(std::string id)
        {
            if(id.size() != 11) return false;

            for(auto c : id)
            {
                if(c == '-') continue;
                if(c == '_') continue;
                if(c >= 'A' && c <= 'Z') continue;
                if(c >= 'a' && c <= 'z') continue;
                if(c >= '0' && c <= '9') continue;
                return false;
            }
            return true;
        }
    public:
        VideoId(std::string url)
        {
            if(IsValid(url)) 
            {
                hasId=true;
                id = url;
                return;
            }
            regex reg("youtube\\..+?/watch.*?v=(.*?)(?:&|/|$)");
            smatch m; 
            regex_search(url,m,reg);
            if(m.size() == 2)
            {
                
                std::string s = m[1].str();
                
                if(IsValid(s)) {
                    id = s;
                    hasId=true;
                    return;
                }
            }
            reg = regex("youtu\\.be/(.*?)(?:\\?|&|/|$)");
            regex_search(url,m,reg);
            if(m.size() == 2)
            {
                
                std::string s = m[1].str();
                
                if(IsValid(s)) {
                    id = s;
                    hasId=true;
                    return;
                }
            }
            reg = regex("youtube\\..+?/embed/(.*?)(?:\\?|&|/|$)");
            regex_search(url,m,reg);
            if(m.size() == 2)
            {
                
                std::string s = m[1].str();
                
                if(IsValid(s)) {
                    id = s;
                    hasId=true;
                    return;
                }
            }
             reg = regex("youtube\\..+?/shorts/(.*?)(?:\\?|&|/|$)");
            regex_search(url,m,reg);
            if(m.size() == 2)
            {
                
                std::string s = m[1].str();
                
                if(IsValid(s)) {
                    id = s;
                    hasId=true;
                    return;
                }
            }
             reg = regex("youtube\\..+?/live/(.*?)(?:\\?|&|/|$)");
            regex_search(url,m,reg);
            if(m.size() == 2)
            {
                
                std::string s = m[1].str();
                
                if(IsValid(s)) {
                    id = s;
                    hasId=true;
                    return;
                }
            }
        }
        std::string Value()
        {
            return id;
        }
        bool HasValue()
        {
            return hasId;
        }
};
class MyData {
    public:
    std::string s;
    size_t offset=0;
};
static size_t read_info_json(char *data, size_t size, size_t nmemb, void *clientp)
{
  size_t realsize = size * nmemb;
  MyData* str = static_cast<MyData*>(clientp);
  
  if(str->s.size() - str->offset < realsize)
    realsize = str->s.size() - str->offset;
  memcpy(data,str->s.data() + str->offset,realsize);
 //fwrite(str->s.data() + str->offset,1,realsize,stderr);
  str->offset += realsize;
  return realsize;
}
static size_t write_info_json(char *data, size_t size, size_t nmemb, void *clientp)
{
  size_t realsize = size * nmemb;
  std::string* str = static_cast<std::string*>(clientp);
  str->append(data,realsize);
  return realsize;
}
json_t* download_info(VideoId& id)
{
    CURL* curl = curl_easy_init();
    struct curl_slist *headers = curl_slist_append(NULL, "Content-Type: application/json");
    curl_slist_append(headers, "User-Agent: com.google.android.youtube/17.36.4 (Linux; U; Android 12; GB) gzip");
    //curl_slist_append(headers,"User-Agent: Google-Ads-Creatives-Assistant");
    curl_slist_append(headers,"SOCS: CAISEwgDEgk2NzM5OTg2ODUaAmVuIAEaBgiA6p23Bg");
    //std::string json= "{\"videoId\":\"" + id.Value() +"\",\"context\":{\"client\":{\"clientName\":\"ANDROID_TESTSUITE\",\"clientVersion\": \"1.9\",\"androidSdkVersion\":30, \"hl\":\"en\",\"gl\":\"US\",\"utcOffsetMinutes\":0}}}";
    std::string json= "{\"videoId\":\"" + id.Value() +"\",\"context\":{\"client\":{\"clientName\":\"GOOGLE_ASSISTANT\",\"clientVersion\": \"0.1\", \"hl\":\"en\",\"gl\":\"US\",\"utcOffsetMinutes\":0}}}";
    //I replaced ANDROID_TESTSUITE with GOOGLE_ASSISTANT and it worked wow
   
    
    ///youtubei/v1/player?key=AIzaSyA8eiZmM1FaDVjRy-df2KTyQ_vz_yYM39w
    std::string outJson={};
    curl_easy_setopt(curl,CURLOPT_HTTPHEADER,headers);
   // curl_easy_setopt(curl,CURLOPT_HTTPPOST,json.c_str());
   curl_easy_setopt(curl, CURLOPT_POST, 1L);
    curl_easy_setopt(curl,CURLOPT_READFUNCTION,read_info_json);
    
    MyData data;
    data.s = json;
    curl_easy_setopt(curl,CURLOPT_INFILESIZE,(long)json.size());
    curl_easy_setopt(curl,CURLOPT_READDATA,static_cast<void*>(&data));
    curl_easy_setopt(curl,CURLOPT_WRITEFUNCTION,write_info_json);
    curl_easy_setopt(curl,CURLOPT_WRITEDATA,static_cast<void*>(&outJson));
    curl_easy_setopt(curl,CURLOPT_HTTP_VERSION,CURL_HTTP_VERSION_1_1);
    curl_easy_setopt(curl,CURLOPT_URL,"https://www.youtube.com/youtubei/v1/player?key=AIzaSyA8eiZmM1FaDVjRy-df2KTyQ_vz_yYM39w");
   CURLcode c= curl_easy_perform(curl);
    
    if(c != CURLcode::CURLE_OK)
    printf("%s\n",curl_easy_strerror(c));
    else
    {
        long http_code = 0;
        curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &http_code);

        if(http_code != 200)
        printf("INFO STATUS_CODE: %i\n",(int)http_code);
        
    }
    curl_easy_cleanup(curl);
    
    return json_loads(outJson.c_str(),0,NULL);

}
 bool Invalid(char c)
        {
            //just do windows because it is the strictist when it comes to windows, mac and linux
            if(c >= 0 && c < 32) return true;
            if(c == 127) return true;
            if(c == '\\') return true;
            if(c == '*') return true;
            if(c == '/') return true;
            if(c == '|') return true;
            if(c == ':') return true;
            if(c == '<') return true;
            if(c == '>') return true;
            if(c == '\"') return true;
            if(c == '?') return true;
            return false;
        }
void safe_title(std::string& s,const char* str, size_t len)
{
    for(size_t i=0;i<len;i++)
    {
        if(Invalid(str[i])) continue;
        s.push_back(str[i]);
    }
    
}
void download_file(const char* url, std::filesystem::path& file,bool progress=false)
{
    CURL* curl = curl_easy_init();
    struct curl_slist *headers=curl_slist_append(NULL, "User-Agent: com.google.android.youtube/17.36.4 (Linux; U; Android 12; GB) gzip");
    curl_slist_append(headers,"SOCS: CAISEwgDEgk2NzM5OTg2ODUaAmVuIAEaBgiA6p23Bg");
   
    curl_easy_setopt(curl,CURLOPT_URL,url);
    FILE* f = fopen(file.c_str(),"wb");
    curl_easy_setopt(curl,CURLOPT_WRITEDATA, f);
    curl_easy_setopt(curl,CURLOPT_HTTPHEADER,headers);
    curl_easy_setopt(curl,CURLOPT_NOPROGRESS,progress ? 0L : 1L);
    curl_easy_setopt(curl,CURLOPT_FOLLOWLOCATION,1L);
   CURLcode c= curl_easy_perform(curl);
    if(c != CURLcode::CURLE_OK)
    printf("%s\n",curl_easy_strerror(c));
    else
    {
        long http_code = 0;
        curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &http_code);

        if(http_code != 200)
        printf("STATUS_CODE: %i\n",(int)http_code);
        
    }
    curl_easy_cleanup(curl);
    auto len=ftell(f);
    fclose(f);
    if(len == 0)
        unlink(file.c_str());
}
void download_video(VideoId& id)
{
    auto res=download_info(id);
    auto id2= id.Value();
    auto details = json_object_get(res,"videoDetails");
    if(details != nullptr && json_is_object(details))
    {
        auto videoTitle = json_object_get(details,"title");
        if(videoTitle != nullptr && json_is_string(videoTitle))
        {
            std::string title={};
            safe_title(title,json_string_value(videoTitle),json_string_length(videoTitle));
            title.push_back('-');
             title.append(id.Value());
           
            std::string fname = title;
             fname.append(".mp4");
            
            auto sd = json_object_get(res,"streamingData");
            if(sd == nullptr || !json_is_object(sd))
            {
                std::cout << "ERR: streamingData does not exist" << std::endl;
                goto end;
            }
            auto formats = json_object_get(sd,"formats");
            if(formats == nullptr || !json_is_array(formats))
            {
                std::cout << "ERR: formats does not exist" << std::endl;
                goto end;
            }
            auto fmt = json_array_get(formats,0);
            if(fmt == nullptr || !json_is_object(fmt))
            {
                std::cout << "ERR: formats[0] does not exist" << std::endl;
                goto end;
            }
            auto url = json_object_get(fmt,"url");
            if(url == nullptr || !json_is_string(url))
            {
                std::cout << "ERR: video url does not exist" << std::endl;
                goto end;
            }
            const char* _url=json_string_value(url);
            std::filesystem::path fname2 = fname;
            std::cout << "Downloading: " << title << std::endl;
            download_file(_url,fname2,true);
            std::filesystem::path data_dir = title + "_data";
            std::filesystem::create_directory(data_dir);
            auto meta=data_dir / "metadata.json";
            
            
            json_dump_file(details,meta.c_str(),JSON_INDENT(4));

            json_t* thumbnail = json_object_get(details,"thumbnail");
            if(thumbnail == nullptr || !json_is_object(thumbnail))
             {
                std::cout << "ERR: thumbnail does not exist" << std::endl;
                goto end;
            }
            json_t* thumbnails = json_object_get(thumbnail,"thumbnails");
            if(thumbnails == nullptr || !json_is_array(thumbnails))
            {
                std::cout << "ERR: thumbnails does not exist" << std::endl;
                goto end;
            }
            size_t index;
            json_t* value;
            json_array_foreach(thumbnails,index,value)
            {
                json_t* thumbUrl = json_object_get(value,"url");
                if(thumbUrl == nullptr || !json_is_string(thumbUrl)) 
                {
                    std::cout << "ERR: thumbnail url does not exist" << std::endl;
                    continue;
                } 
                json_t* thubWid = json_object_get(value,"width");
                if(thubWid == nullptr || !json_is_integer(thubWid))  {
                    std::cout << "ERR: thumbnail width does not exist" << std::endl;
                    continue;
                } 
                json_t* thubHei = json_object_get(value,"height");
                if(thubHei == nullptr || !json_is_integer(thubHei))  {
                    std::cout << "ERR: thumbnail height does not exist" << std::endl;
                    continue;
                } 

                auto w=json_integer_value(thubWid);
                auto h=json_integer_value(thubHei);
                auto u=json_string_value(thumbUrl);
                std::string thumbName = std::to_string(w) +"x"+ std::to_string(h) + ".jpg";
                std::filesystem::path thumbPath = data_dir / thumbName;
                download_file(u,thumbPath);
            }
        }
        else  {
                    std::cout << "ERR: video title does not exist" << std::endl;
                    
                } 
    }
    else
    {
         
                    std::cout << "ERR: videoDetails does not exist" << std::endl;
                
    }
    end:
        json_decref(res);
}

int main(int argc,char** argv)
{   
    curl_global_init(CURL_GLOBAL_ALL);
    if(argc == 1)
    {
        printf("USAGE: %s <YouTube Video Urls or Ids...>\nLICENSED UNDER GPLv3, type --license or goto <https://www.gnu.org/licenses/gpl-3.0.html> for more info\nUses some code from https://github.com/Tyrrrz/YoutubeExplode which whom I don't agree with\n",argv[0]);
    }
    if(argc == 2 && strcmp(argv[1],"--license") == 0)
    {
        printf("%s\n",license);
        return 0;
    }
    for(int i = 1;i<argc;i++)
    {
        VideoId id(argv[i]);
        if(id.HasValue())
        {
            download_video(id);
        }
    }
    curl_global_cleanup();
}