youtube: use mpv stream_cb instead of proxy server

1 files changed, 0 insertions, 623 deletions

diff --git a/src/plugins/youtube/YoutubeMediaProxy.cpp b/src/plugins/youtube/YoutubeMediaProxy.cpp
deleted file mode 100644
index e51e3d9..0000000
--- a/src/plugins/youtube/YoutubeMediaProxy.cpp
+++ /dev/null
@@ -1,623 +0,0 @@
-#include "../../../plugins/youtube/YoutubeMediaProxy.hpp"
-#include "../../../include/NetUtils.hpp"
-#include "../../../include/Utils.hpp"
-
-#include <vector>
-#include <stdio.h>
-#include <string.h>
-#include <errno.h>
-#include <signal.h>
-#include <inttypes.h>
-#include <assert.h>
-
-#include <unistd.h>
-#include <sys/socket.h>
-#include <netinet/in.h>
-#include <fcntl.h>
-
-// TODO: What if the client sends a new header without reconnecting? is that even allowed by http standard?
-// TODO: Detect when download has finished (and close connection).
-
-static ssize_t read_eintr(int fd, void *buffer, size_t size) {
-    while(true) {
-        ssize_t bytes_read = read(fd, buffer, size);
-        if(bytes_read == -1) {
-            if(errno != EINTR)
-                return -1;
-        } else {
-            return bytes_read;
-        }
-    }
-}
-
-static ssize_t write_all(int fd, const void *buffer, size_t size) {
-    ssize_t bytes_written = 0;
-    while((size_t)bytes_written < size) {
-        ssize_t written = write(fd, (char*)buffer + bytes_written, size - bytes_written);
-        if(written == -1) {
-            if(errno != EINTR)
-                return -1;
-        } else {
-            bytes_written += written;
-        }
-    }
-    return bytes_written;
-}
-
-static ssize_t write_all_blocking(int fd, const void *buffer, size_t size) {
-    ssize_t bytes_written = 0;
-    while((size_t)bytes_written < size) {
-        ssize_t written = write(fd, (char*)buffer + bytes_written, size - bytes_written);
-        if(written == -1) {
-            if(errno != EINTR && errno != EWOULDBLOCK)
-                return -1;
-        } else {
-            bytes_written += written;
-        }
-    }
-    return bytes_written;
-}
-
-namespace QuickMedia {
-    static const int MAX_BUFFER_SIZE = 65536;
-    static const int64_t RANGE = 5242870;
-    static const char download_error_response_msg[] = 
-        "HTTP/1.1 500 Internal Server Error\r\n"
-        "Content-Length: 0\r\n\r\n";
-    static const char download_finished_response_msg[] = 
-        "HTTP/1.1 200 OK\r\n"
-        "Content-Length: 0\r\n\r\n";
-
-    static bool set_non_blocking(int fd) {
-        const int flags = fcntl(fd, F_GETFL, 0);
-        if(fd == -1 || fcntl(fd, F_SETFL, flags | O_NONBLOCK) == -1)
-            return false;
-        return true;
-    }
-
-    // TODO: Restrict range end to remote file size (content-length which we have saved).
-    // TODO: Check if custom youtube redirect code is needed
-    bool YoutubeMediaProxy::start_download(const std::string &media_url, ReadProgram &read_program, int64_t range_start, int64_t end_range, bool include_header) {
-        std::string r = std::to_string(range_start) + "-" + std::to_string(end_range);
-
-        std::string url = media_url;;
-        std::vector<const char*> args = { "curl",
-            "-H", "Accept-Language: en-US,en;q=0.5", "-H", "Connection: keep-alive",
-            "--no-buffer",
-            "-H", "user-agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/81.0.4044.138 Safari/537.36",
-            "-g", "-s", "-L", "-f", "-r", r.c_str() };
-
-        if(include_header)
-            args.push_back("-i");
-
-        //fprintf(stderr, "url: %s\n", url.c_str());
-
-        args.insert(args.end(), { "--", url.c_str(), nullptr });
-
-        if(exec_program_pipe(args.data(), &read_program) != 0)
-            return false;
-
-        if(!set_non_blocking(read_program.read_fd)) {
-            perror("start_download: failed to set curl pipe non blocking mode");
-            close(read_program.read_fd);
-            kill(read_program.pid, SIGTERM);
-            read_program.read_fd = -1;
-            read_program.pid = -1;
-            return false;
-        }
-
-        return true;
-    }
-
-    YoutubeStaticMediaProxy::YoutubeStaticMediaProxy() {
-
-    }
-
-    YoutubeStaticMediaProxy::~YoutubeStaticMediaProxy() {
-        stop();
-    }
-
-    bool YoutubeStaticMediaProxy::start(const std::string &youtube_media_url, int64_t content_length) {
-        if(socket_fd != -1)
-            return false;
-
-        socket_fd = socket(AF_INET, SOCK_STREAM, 0);
-        if(socket_fd == -1) {
-            perror("YoutubeStaticMediaProxy::start: socket failed");
-            return false;
-        }
-
-        socklen_t response_sock_addr_len;
-        struct sockaddr_in server_addr;
-        memset(&server_addr, 0, sizeof(server_addr));
-        server_addr.sin_family = AF_INET;
-        server_addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
-        server_addr.sin_port = htons(0);
-
-        next_range_length = RANGE;
-
-        if(bind(socket_fd, (struct sockaddr*)&server_addr, sizeof(server_addr)) == -1) {
-            perror("YoutubeStaticMediaProxy::start: bind failed");
-            goto err;
-        }
-
-        if(listen(socket_fd, 2) == -1) {
-            perror("YoutubeStaticMediaProxy::start: listen failed");
-            goto err;
-        }
-
-        if(!set_non_blocking(socket_fd)) {
-            perror("YoutubeStaticMediaProxy::start: failed to set socket non blocking mode");
-            goto err;
-        }
-
-        struct sockaddr_in response_sock_addr;
-        response_sock_addr_len = sizeof(response_sock_addr);
-        if(getsockname(socket_fd, (struct sockaddr*)&response_sock_addr, &response_sock_addr_len) == -1) {
-            perror("YoutubeStaticMediaProxy::start: getsockname failed");
-            goto err;
-        }
-
-        port = ntohs(response_sock_addr.sin_port);
-        this->youtube_media_url = youtube_media_url;
-        this->content_length = content_length;
-        return true;
-
-        err:
-        if(downloader_read_program.read_fd != -1)
-            close(downloader_read_program.read_fd);
-        if(downloader_read_program.pid != -1)
-            kill(downloader_read_program.pid, SIGTERM);
-        close(socket_fd);
-        socket_fd = -1;
-        return false;
-    }
-
-    void YoutubeStaticMediaProxy::stop() {
-        if(downloader_read_program.read_fd != -1) {
-            close(downloader_read_program.read_fd);
-            downloader_read_program.read_fd = -1;
-        }
-
-        if(downloader_read_program.pid != -1) {
-            kill(downloader_read_program.pid, SIGTERM);
-            wait_program(downloader_read_program.pid);
-            downloader_read_program.pid = -1;
-        }
-
-        if(client_fd != -1) {
-            close(client_fd);
-            client_fd = -1;
-        }
-
-        if(socket_fd != -1) {
-            close(socket_fd);
-            socket_fd = -1;
-        }
-
-        clear_download_state();
-        client_request_buffer.clear();
-        client_request_finished = false;
-    }
-
-    YoutubeStaticMediaProxy::Error YoutubeStaticMediaProxy::update() {
-        if(socket_fd == -1)
-            return Error::OK;
-
-        if(client_fd == -1) {
-            client_fd = accept_client();
-            if(client_fd == -1)
-                return Error::OK;
-        } else {
-            const int new_client_fd = accept_client();
-            if(new_client_fd != -1) {
-                on_client_disconnect();
-                client_fd = new_client_fd;
-            }
-        }
-
-        Error err = read_client_data();
-        if(err != Error::OK || !client_request_finished)
-            return err;
-        if(downloader_read_program.pid == -1)
-            return Error::ERROR;
-        return handle_download();
-    }
-
-    bool YoutubeStaticMediaProxy::get_address(std::string &address) {
-        if(socket_fd == -1)
-            return false;
-
-        address = "http://127.0.0.1:" + std::to_string(port);
-        return true;
-    }
-
-    void YoutubeStaticMediaProxy::on_client_disconnect() {
-        client_request_buffer.clear();
-        client_request_finished = false;
-        download_started = false;
-
-        if(client_fd != -1) {
-            close(client_fd);
-            client_fd = -1;
-        }
-
-        if(downloader_read_program.pid != -1)
-            kill(downloader_read_program.pid, SIGTERM);
-
-        update_download_program_status(true);
-    }
-
-    // Returns 0 if start range is not found
-    static int64_t header_extract_start_range(const std::string &header) {
-        std::string range = header_extract_value(header, "range");
-        if(range.empty())
-            return 0;
-
-        int64_t start_range = 0;
-        if(sscanf(range.c_str(), " bytes=%" PRId64, &start_range) != 1)
-            return 0;
-
-        return start_range;
-    }
-
-    static int64_t header_extract_content_length(const std::string &header) {
-        std::string content_length_str = header_extract_value(header, "content-length");
-        if(content_length_str.empty())
-            return 0;
-
-        errno = 0;
-        char *endptr;
-        int64_t content_length = strtoll(content_length_str.c_str(), &endptr, 10);
-        if(endptr == content_length_str.c_str() || errno != 0)
-            return 0;
-
-        return content_length;
-    }
-
-    // TODO: What about hls (live streams)? need to test with that. There may not be a need to use YoutubeMediaProxy for that case (in that case document it).
-    YoutubeStaticMediaProxy::Error YoutubeStaticMediaProxy::read_client_data() {
-        if(client_request_finished)
-            return Error::OK;
-
-        char read_buffer[4096];
-        const ssize_t num_bytes_read = read_eintr(client_fd, read_buffer, sizeof(read_buffer));
-        if(num_bytes_read == -1) {
-            const int err = errno;
-            if(err == EAGAIN || err == EWOULDBLOCK) {
-                return Error::OK;
-            } else if(err == EPIPE || err == ECONNRESET) {
-                //fprintf(stderr, "YoutubeStaticMediaProxy::read_client_data: client disconnected\n");
-                on_client_disconnect();
-                return Error::ERROR;
-            } else {
-                perror("YoutubeStaticMediaProxy::read_client_data: read failed");
-                return Error::ERROR;
-            }
-        } else if(num_bytes_read == 0) {
-            //fprintf(stderr, "YoutubeStaticMediaProxy::read_client_data: client disconnected\n");
-            on_client_disconnect();
-            return Error::ERROR;
-        }
-
-        client_request_buffer.append(read_buffer, num_bytes_read);
-        const size_t header_end = client_request_buffer.find("\r\n\r\n");
-        if(header_end != std::string::npos) {
-            client_request_buffer.erase(header_end + 4);
-            client_request_finished = true;
-            download_started = false;
-            download_read_buffer_offset = 0;
-
-            const int64_t new_start_range = header_extract_start_range(client_request_buffer);
-            if(downloader_read_program.pid != -1) {
-                kill(downloader_read_program.pid, SIGTERM);
-                wait_program(downloader_read_program.pid);
-                downloader_read_program.pid = -1;
-            }
-            clear_download_state();
-            return update_download_program_status(false, new_start_range, true);
-        } else {
-            if(client_request_buffer.size() > MAX_BUFFER_SIZE) {
-                client_request_finished = true;
-                fprintf(stderr, "YoutubeStaticMediaProxy::read_client_data: buffer is full (malicious client?)\n");
-                return Error::ERROR;
-            }
-        }
-        return Error::OK;
-    }
-
-    void YoutubeStaticMediaProxy::clear_download_state() {
-        download_header.clear();
-        download_header_finished = false;
-        download_header_sent = false;
-        download_header_remaining_sent = false;
-        download_header_written_offset = 0;
-        download_read_buffer_offset = 0;
-        next_range_length = RANGE;
-        end_of_file = false;
-    }
-
-    YoutubeStaticMediaProxy::Error YoutubeStaticMediaProxy::update_download_program_status(bool client_disconnected, int64_t new_range_start, bool restart_download) {
-        int program_status = 0;
-        if(downloader_read_program.pid != -1) {
-            if(client_disconnected) {
-                wait_program(downloader_read_program.pid);
-            } else {
-                if(wait_program_non_blocking(downloader_read_program.pid, &program_status) == 0 && program_status == 0)
-                    return Error::OK;
-            }
-            downloader_read_program.pid = -1;
-        }
-        
-        if(downloader_read_program.read_fd != -1) {
-            close(downloader_read_program.read_fd);
-            downloader_read_program.read_fd = -1;
-        }
-
-        if(program_status != 0) {
-            //fprintf(stderr, "YoutubeStaticMediaProxy::update_download_program_status: download failed, exit status: %d\n", program_status);
-            if(client_fd != -1) {
-                write_all_blocking(client_fd, download_finished_response_msg, sizeof(download_finished_response_msg) - 1);
-                close(client_fd);
-                client_fd = -1;
-                client_request_buffer.clear();
-                client_request_finished = false;
-            }
-            return Error::ERROR;
-        }
-
-        if(client_disconnected) {
-            current_download_range = 0;
-        } else {
-            current_download_range += next_range_length;
-        }
-
-        if(new_range_start != -1) {
-            download_range_start = new_range_start;
-            current_download_range = download_range_start;
-        }
-
-        if(new_range_start == -1) {
-            download_header_finished = true;
-            download_header_sent = true;
-            download_header_remaining_sent = true;
-        } else {
-            clear_download_state();
-        }
-
-        if(client_disconnected) {
-            clear_download_state();
-            return Error::ERROR;
-        }
-
-        if(!restart_download)
-            return Error::OK;
-
-        if(new_range_start == -1) {
-            download_header_finished = true;
-            download_header_sent = true;
-            download_header_remaining_sent = true;
-        }
-
-        int64_t end_range = current_download_range + RANGE;
-        if(end_range > content_length) {
-            end_range = content_length;
-            end_of_file = true;
-        }
-
-        const bool start_download_success = start_download(youtube_media_url, downloader_read_program, current_download_range, end_range, new_range_start != -1);
-        if(!start_download_success) {
-            fprintf(stderr, "YoutubeStaticMediaProxy::update_download_program_status: failed to start download\n");
-            if(client_fd != -1) {
-                write_all_blocking(client_fd, download_error_response_msg, sizeof(download_error_response_msg) - 1);
-                close(client_fd);
-                client_fd = -1;
-                client_request_buffer.clear();
-                client_request_finished = false;
-            }
-
-            clear_download_state();
-            return Error::ERROR;
-        }
-
-        return Error::OK;
-    }
-
-    static void header_replace_content_length(std::string &header, size_t header_size, int64_t new_content_length) {
-        if(new_content_length < 0)
-            new_content_length = 0;
-
-        const char *content_length_p = strcasestr(header.c_str(), "content-length:");
-        if(!content_length_p)
-            return;
-
-        const size_t content_length_start = (content_length_p + 15) - header.c_str();
-        if(content_length_start >= header_size)
-            return;
-        const size_t line_end = header.find("\r\n", content_length_start);
-        header.replace(content_length_start, line_end - content_length_start, std::to_string(new_content_length));
-    }
-
-    YoutubeStaticMediaProxy::Error YoutubeStaticMediaProxy::continue_send(const char *buffer_start, size_t total_bytes_to_write, int &buffer_offset) {
-        int num_bytes_to_write = total_bytes_to_write - buffer_offset;
-        //assert(num_bytes_to_write >= 0);
-        if(num_bytes_to_write < 0) num_bytes_to_write = 0;
-        if(num_bytes_to_write == 0) {
-            buffer_offset = 0;
-            return Error::OK;
-        }
-
-        const ssize_t num_bytes_written = write_all(client_fd, buffer_start + buffer_offset, num_bytes_to_write);
-        if(num_bytes_written == -1) {
-            const int err = errno;
-            if(err == EAGAIN || err == EWOULDBLOCK) {
-                return Error::OK;
-            } else if(err == EPIPE || err == ECONNRESET) {
-                //fprintf(stderr, "YoutubeStaticMediaProxy::continue_send: client disconnected\n");
-                on_client_disconnect();
-                return Error::ERROR;
-            } else {
-                perror("YoutubeStaticMediaProxy::continue_send: write failed");
-                return Error::ERROR;
-            }
-        } else if(num_bytes_written == 0) {
-            //fprintf(stderr, "YoutubeStaticMediaProxy::continue_send: client disconnected\n");
-            on_client_disconnect();
-            return Error::ERROR;
-        } else if(num_bytes_written != num_bytes_to_write) {
-            buffer_offset += num_bytes_written;
-        } else {
-            buffer_offset = 0;
-        }
-        return Error::OK;
-    }
-
-    static bool http_is_redirect(const char *header, size_t size) {
-        const void *end_of_first_line_p = memmem(header, size, "\r\n", 2);
-        if(!end_of_first_line_p)
-            return false;
-        return memmem(header, (const char*)end_of_first_line_p - header, " 30", 3) != nullptr;
-    }
-
-    static size_t find_start_of_first_non_redirect_header(const char *headers, size_t size, size_t &header_end) {
-        const char *start = headers;
-        while(size > 0) {
-            const void *end_of_header = memmem(headers, size, "\r\n\r\n", 4);
-            if(!end_of_header)
-                return std::string::npos;
-
-            const size_t offset_to_end_of_headers = ((const char*)end_of_header + 4) - headers;
-            if(!http_is_redirect(headers, offset_to_end_of_headers)) {
-                header_end = (headers - start) + offset_to_end_of_headers;
-                return headers - start;
-            }
-
-            headers += offset_to_end_of_headers;
-            size -= offset_to_end_of_headers;
-        }
-        return std::string::npos;
-    }
-
-    YoutubeStaticMediaProxy::Error YoutubeStaticMediaProxy::handle_download() {
-        // TODO: Maybe read even if write is being slow and failing?
-        if(download_read_buffer_offset == 0) {
-            downloader_num_read_bytes = read_eintr(downloader_read_program.read_fd, download_read_buffer, sizeof(download_read_buffer));
-            if(downloader_num_read_bytes == -1) {
-                const int err = errno;
-                if(err == EAGAIN || err == EWOULDBLOCK) {
-                    return Error::OK;
-                } else {
-                    perror("YoutubeStaticMediaProxy::handle_download: curl read failed");
-                    return Error::ERROR;
-                }
-            } else if(downloader_num_read_bytes == 0) {
-                if(end_of_file) {
-                    if(client_fd != -1) {
-                        write_all_blocking(client_fd, download_finished_response_msg, sizeof(download_finished_response_msg) - 1);
-                        close(client_fd);
-                        client_fd = -1;
-                        client_request_buffer.clear();
-                        client_request_finished = false;
-                    }
-                    return Error::OK;
-                }
-
-                Error err = update_download_program_status(false, -1, true);
-                if(err != Error::OK)
-                    return err;
-            } else {
-                if(!download_started) {
-                    total_downloaded_bytes = 0;
-                    download_started = true;
-                    download_start_time = get_boottime_milliseconds();
-                }
-                total_downloaded_bytes += downloader_num_read_bytes;
-            }
-        }
-
-        // TODO: Remove this code and instead create the header ourselves and send it to the client. Then pipe the curl output directly to the client input.
-        if(!download_header_finished) {
-            download_header.append(download_read_buffer, downloader_num_read_bytes);
-            size_t header_end = std::string::npos;
-            const size_t offset_to_start_of_header = find_start_of_first_non_redirect_header(download_header.c_str(), download_header.size(), header_end);
-            if(header_end != std::string::npos) {
-                download_header.erase(0, offset_to_start_of_header);
-                header_end -= offset_to_start_of_header;
-
-                download_header_finished = true;
-                download_header_sent = false;
-                download_header_remaining_sent = false;
-                download_header_written_offset = 0;
-                download_header_offset_to_end_of_header = header_end;
-                download_read_buffer_offset = -1;
-
-                next_range_length = header_extract_content_length(download_header.substr(0, header_end));
-                header_replace_content_length(download_header, header_end, content_length - download_range_start);
-            } else {
-                if(download_header.size() > MAX_BUFFER_SIZE) {
-                    fprintf(stderr, "YoutubeStaticMediaProxy::handle_download: buffer is full (malicious server?)\n");
-                    if(downloader_read_program.pid != -1) {
-                        kill(downloader_read_program.pid, SIGTERM);
-                        wait_program(downloader_read_program.pid);
-                        downloader_read_program.pid = -1;
-                    }
-                    clear_download_state();
-                    update_download_program_status(false, 0, false);
-                    return Error::ERROR;
-                }
-            }
-        }
-
-        if(download_header_finished && !download_header_sent) {
-            Error err = continue_send(download_header.data(), download_header_offset_to_end_of_header, download_header_written_offset);
-            if(err != Error::OK)
-                return err;
-
-            if(download_header_written_offset == 0) {
-                download_header_sent = true;
-                download_header_written_offset = download_header_offset_to_end_of_header;
-            }
-        }
-
-        if(download_header_finished && !download_header_remaining_sent) {
-            Error err = continue_send(download_header.data(), download_header.size(), download_header_written_offset);
-            if(err != Error::OK)
-                return err;
-
-            if(download_header_written_offset == 0) {
-                download_header_remaining_sent = true;
-                download_read_buffer_offset = 0;
-                return Error::OK;
-            }
-        }
-
-        if(download_header_remaining_sent)
-            return continue_send(download_read_buffer, downloader_num_read_bytes, download_read_buffer_offset);
-
-        return Error::OK;
-    }
-
-    int YoutubeStaticMediaProxy::accept_client() {
-        struct sockaddr_in client_addr;
-        socklen_t client_addr_len = sizeof(client_addr);
-        int new_client_fd = accept(socket_fd, (struct sockaddr*)&client_addr, &client_addr_len);
-        if(new_client_fd == -1) {
-            const int err = errno;
-            if(err == EAGAIN || err == EWOULDBLOCK) {
-                return -1;
-            } else {
-                perror("YoutubeStaticMediaProxy::accept_client accept failed");
-                return -1;
-            }
-        }
-
-        if(!set_non_blocking(new_client_fd)) {
-            perror("YoutubeStaticMediaProxy::accept_client: failed to set client socket non blocking mode");
-            close(new_client_fd);
-            return -1;
-        }
-
-        //fprintf(stderr, "YoutubeStaticMediaProxy::accept_client: client connected!\n");
-        return new_client_fd;
-    }
-}