feat: resolve HTTP video URLs with bundled yt-dlp

Sources/Core/network_policy.hpp

@@ -6,9 +6,7 @@
 #include <arpa/inet.h>
 
 namespace playback {
-inline bool validNetworkURL(const char *text) {
-    if (!text) return false;
-    const std::string_view url(text);
+inline bool validNetworkURL(std::string_view url) {
     if (url.size() > 65536) return false;
     const std::size_t start = url.starts_with("https://") ? 8 : url.starts_with("http://") ? 7 : 0;
     if (!start) return false;
@@ -52,6 +50,9 @@ inline bool validNetworkURL(const char *text) {
     }
     return port.empty() || number > 0;
 }
+inline bool validNetworkURL(const char *text) {
+    return text && validNetworkURL(std::string_view(text));
+}
 inline bool validHeaders(const char *text) {
     if (!text) return true;
     const std::string_view headers(text);

Sources/Core/player.h

@@ -58,8 +58,8 @@ typedef struct PlayerNetworkSource {
     const char *audio_headers;
     double duration;
     bool is_live;
-    // Canonical YouTube webpage or stable miruro:<base64url media_id>:<positive episode>
-    // identity, never an extracted stream/CDN URL.
+    // Original HTTP(S) video URL (canonical for YouTube), or stable
+    // miruro:<base64url media_id>:<positive episode> identity, never an extracted CDN URL.
     // NULL/empty means no reporting for this source.
     const char *media_url;
     // Initial restored position, applied before publishing ready state. Zero

Sources/Core/progress_reporter.cpp

@@ -1,4 +1,5 @@
 #include "progress_reporter.hpp"
+#include "network_policy.hpp"
 #include <cerrno>
 #include <charconv>
 #include <chrono>
@@ -87,13 +88,7 @@ void ProgressReporter::resume() {
 }
 
 bool ProgressReporter::validMediaURL(std::string_view url) noexcept {
-    constexpr std::string_view prefix = "https://www.youtube.com/watch?v=";
-    if (url.size() != prefix.size() + 11 || url.substr(0, prefix.size()) != prefix) return false;
-    for (char character : url.substr(prefix.size())) {
-        if (!((character >= 'a' && character <= 'z') || (character >= 'A' && character <= 'Z') ||
-              (character >= '0' && character <= '9') || character == '_' || character == '-')) return false;
-    }
-    return true;
+    return validNetworkURL(url);
 }
 
 bool ProgressReporter::validMediaIdentity(std::string_view identity) noexcept {
@@ -203,7 +198,10 @@ bool ProgressReporter::emit(const char *event) noexcept {
             record += "},\"position_seconds\":";
         } else {
             record += "\",\"media_url\":\"";
-            record += mediaURL;
+            for (char character : mediaURL) {
+                if (character == '"' || character == '\\') record += '\\';
+                record += character;
+            }
             record += "\",\"position_seconds\":";
         }
         appendNumber(record, snapshot.position);