Support multiple endpoints on MoQServer (#111)

Summary:
Pull Request resolved: #111

Replace the single `endpoint_` string in `MoQServerBase` with an
`unordered_set<string> endpoints_` so multiple paths can be served by one
server instance.

- `getEndpoint()` is replaced by `addEndpoint()` (inserts into the set)
  and `isAcceptedEndpoint(path)` (checks membership).
- The constructor still accepts a single initial endpoint for backward
  compatibility.
- `MoQServer` exposes `addEndpoint()` publicly, forwarding to the base.
- `Handler::onHeadersComplete` now calls `isAcceptedEndpoint()` instead of
  comparing against a single string.

Reviewed By: sharmafb

Differential Revision: D95593896

fbshipit-source-id: dfaf20c77e8b00cad4dcf48d5238ae8dbeacb0dc

Author: afrind

moxygen/MoQServer.cpp

@@ -248,7 +248,7 @@ void MoQServer::Handler::onHeadersComplete(
   HTTPMessage resp;
   resp.setHTTPVersion(1, 1);
 
-  if (req->getPathAsStringPiece() != server_.getEndpoint()) {
+  if (!server_.isAcceptedEndpoint(req->getPathAsStringPiece())) {
     XLOG(DBG0) << req->getPathAsStringPiece();
     req->dumpMessage(0);
     resp.setStatusCode(404);

moxygen/MoQServer.h

@@ -89,6 +89,10 @@ class MoQServer : public MoQServerBase {
       folly::EventBase* evb,
       std::shared_ptr<const fizz::server::FizzServerContext> ctx);
 
+  void addEndpoint(std::string endpoint) {
+    MoQServerBase::addEndpoint(std::move(endpoint));
+  }
+
   void setWtMoqtProtocols(std::vector<std::string> protocols) {
     wtMoqtProtocols_ = std::move(protocols);
   }

moxygen/MoQServerBase.cpp

@@ -10,8 +10,9 @@
 
 namespace moxygen {
 
-MoQServerBase::MoQServerBase(std::string endpoint)
-    : endpoint_(std::move(endpoint)) {}
+MoQServerBase::MoQServerBase(std::string endpoint) {
+  endpoints_.insert(std::move(endpoint));
+}
 
 void MoQServerBase::setMLoggerFactory(std::shared_ptr<MLoggerFactory> factory) {
   mLoggerFactory_ = std::move(factory);

moxygen/MoQServerBase.h

@@ -10,6 +10,7 @@
 #include <moxygen/mlog/MLoggerFactory.h>
 #include <memory>
 #include <string>
+#include <unordered_set>
 
 namespace moxygen {
 
@@ -79,15 +80,18 @@ class MoQServerBase : public MoQSession::ServerSetupCallback {
   // Create a logger from the factory if one is set
   std::shared_ptr<MLogger> createLogger() const;
 
-  [[nodiscard]] const std::string& getEndpoint() const {
-    return endpoint_;
+  void addEndpoint(std::string endpoint) {
+    endpoints_.insert(std::move(endpoint));
+  }
+  bool isAcceptedEndpoint(folly::StringPiece path) const {
+    return endpoints_.count(std::string(path)) > 0;
   }
 
   // AUTHORITY parameter validation methods
   bool isValidAuthorityFormat(const std::string& authority);
   bool isSupportedAuthority(const std::string& authority);
 
-  std::string endpoint_;
+  std::unordered_set<std::string> endpoints_;
   std::shared_ptr<MLoggerFactory> mLoggerFactory_;
 };