Add test for issue #2444

A WWW-Authenticate header must be present in the 401 response to make clients
know that they can authenticate, and how.

src/httpserver.h

@@ -56,11 +56,14 @@ class HTTPRequest
 {
 private:
     struct evhttp_request* req;
+
+    // For test access
+protected:
     bool replySent;
 
 public:
     HTTPRequest(struct evhttp_request* req);
-    ~HTTPRequest();
+    virtual ~HTTPRequest();
 
     enum RequestMethod {
         UNKNOWN,
@@ -76,17 +79,17 @@ public:
 
     /** Get CService (address:ip) for the origin of the http request.
      */
-    CService GetPeer();
+    virtual CService GetPeer();
 
     /** Get request method.
      */
-    RequestMethod GetRequestMethod();
+    virtual RequestMethod GetRequestMethod();
 
     /**
      * Get the request header specified by hdr, or an empty string.
      * Return an pair (isPresent,string).
      */
-    std::pair<bool, std::string> GetHeader(const std::string& hdr);
+    virtual std::pair<bool, std::string> GetHeader(const std::string& hdr);
 
     /**
      * Read request body.
@@ -101,7 +104,7 @@ public:
      *
      * @note call this before calling WriteErrorReply or Reply.
      */
-    void WriteHeader(const std::string& hdr, const std::string& value);
+    virtual void WriteHeader(const std::string& hdr, const std::string& value);
 
     /**
      * Write HTTP reply.
@@ -111,7 +114,7 @@ public:
      * @note Can be called only once. As this will give the request back to the
      * main thread, do not call any other HTTPRequest methods after calling this.
      */
-    void WriteReply(int nStatus, const std::string& strReply = "");
+    virtual void WriteReply(int nStatus, const std::string& strReply = "");
 };
 
 /** Event handler closure.