feat: (better) http validation

webserv/client/Client.cpp

@@ -81,8 +81,7 @@ void Client::request()
     buffer[bytesRead] = '\0'; // NOLINT(cppcoreguidelines-pro-bounds-constant-array-index)
     httpRequest_->receiveData(static_cast<const char *>(buffer), static_cast<size_t>(bytesRead));
 
-    if (httpRequest_->getState() == HttpRequest::State::Complete
-        || httpRequest_->getState() == HttpRequest::State::ParseError)
+    if (httpRequest_->getState() == HttpRequest::State::Complete)
     {
         Log::info("Received request: " + httpRequest_->getHttpVersion() + " " + httpRequest_->getMethod() + " "
                   + httpRequest_->getTarget() + " ");

webserv/http/HttpRequest.cpp

@@ -34,10 +34,16 @@ void HttpRequest::setState(State state)
 {
     if (state == State::Complete)
     {
+        if (! headers_.getHost().has_value())
+        {
+            client_->getHttpResponse().setError(Http::StatusCode::BAD_REQUEST);
+            state_ = State::ParseError;
+            return;
+        }
         ServerConfig *serverConfig = getServerConfig();
         if (serverConfig == nullptr)
         {
-            Log::error("No matching server config found for host");
+            client_->getHttpResponse().setError(Http::StatusCode::NOT_FOUND);
             state_ = State::ParseError;
             return;
         }
@@ -135,6 +141,7 @@ bool HttpRequest::parseBufferforRequestLine()
     if (parts.size() != 3)
     {
         Log::warning("Invalid request line: " + requestLine_);
+        client_->getHttpResponse().setError(Http::StatusCode::BAD_REQUEST);
         state_ = State::ParseError; // Mark as complete to avoid further processing
         return true;
     }
@@ -194,6 +201,7 @@ bool HttpRequest::parseBufferforChunkedBody()
         catch (const std::exception &e)
         {
             Log::warning("Invalid chunk size: " + chunkSizeStr + " - " + e.what());
+            client_->getHttpResponse().setError(400);
             setState(State::ParseError);
             return false;
         }

webserv/http/HttpRequest.hpp

@@ -1,5 +1,6 @@
 #pragma once
 
+#include "webserv/http/HttpResponse.hpp"
 #include <webserv/config/ServerConfig.hpp>
 #include <webserv/http/HttpHeaders.hpp> // for HttpHeaders
 

webserv/http/HttpResponse.cpp

@@ -13,16 +13,31 @@ void HttpResponse::addHeader(const std::string &key, const std::string &value)
 
 void HttpResponse::appendBody(const std::vector<uint8_t> &data)
 {
+    if (complete_)
+    {
+        Log::warning("Attempt to set body on a completed HttpResponse");
+        return;
+    }
     body_.insert(body_.end(), data.begin(), data.end());
 }
 
 void HttpResponse::appendBody(const std::string &body)
 {
+    if (complete_)
+    {
+        Log::warning("Attempt to set body on a completed HttpResponse");
+        return;
+    }
     body_.insert(body_.end(), body.begin(), body.end());
 }
 
 void HttpResponse::setBody(const std::vector<uint8_t> &data) // TODO: validate headers
 {
+    if (complete_)
+    {
+        Log::warning("Attempt to set body on a completed HttpResponse");
+        return;
+    }
     body_ = data;
     setComplete();
 }
@@ -43,6 +58,12 @@ void HttpResponse::setComplete()
     complete_ = true;
 }
 
+void HttpResponse::setError(uint16_t statusCode)
+{
+    statusCode_ = statusCode;
+    complete_ = true;
+}
+
 bool HttpResponse::isComplete() const noexcept
 {
     return complete_;

webserv/http/HttpResponse.hpp

@@ -31,6 +31,7 @@ class HttpResponse
     void setBody(const std::string &body);
 
     void setComplete();
+    void setError(uint16_t statusCode);
 
     void setStatus(uint16_t statusCode);
 

webserv/http/RequestValidator.cpp

@@ -1,8 +1,9 @@
+#include "webserv/log/Log.hpp"
+#include <webserv/config/AConfig.hpp>
 #include <webserv/http/RequestValidator.hpp>
 
-#include <webserv/config/AConfig.hpp>
-
 #include <cstddef>
+#include <optional>
 #include <string>
 #include <vector>
 
@@ -20,9 +21,43 @@ std::optional<RequestValidator::ValidationError> RequestValidator::validate() co
     {
         return error;
     }
+    if (auto error = validateHttpVersion())
+    {
+        return error;
+    }
+    if (auto error = validateHostHeader())
+    {
+        return error;
+    }
     return std::nullopt; // No validation errors
 }
 
+std::optional<RequestValidator::ValidationError> RequestValidator::validateHostHeader() const
+{
+    if (!request->getHeaders().has("Host"))
+    {
+        return ValidationError{400, "Bad Request: Missing Host header"};
+    }
+    std::string hostHeader = request->getHeaders().get("Host");
+    // Basic validation: check if host header is not empty
+    if (hostHeader.empty())
+    {
+        return ValidationError{400, "Bad Request: Empty Host header"};
+    }
+    Log::debug("Host header validated: " + hostHeader);
+    return std::nullopt;
+}
+
+std::optional<RequestValidator::ValidationError> RequestValidator::validateHttpVersion() const
+{
+    std::string httpVersion = request->getHttpVersion();
+    if (httpVersion != "HTTP/1.1" && httpVersion != "HTTP/1.0")
+    {
+        return ValidationError{505, "HTTP Version Not Supported"};
+    }
+    return std::nullopt;
+}
+
 std::optional<RequestValidator::ValidationError> RequestValidator::validateContentLength() const
 {
     size_t bodySize = request->getBody().size();
@@ -48,6 +83,10 @@ std::optional<RequestValidator::ValidationError> RequestValidator::validateMetho
     auto allowedMethodsOpt = config->get<std::vector<std::string>>("allowed_methods");
     std::vector<std::string> allowedMethods;
 
+    if (request->getMethod().empty())
+    {
+        return ValidationError{400, "Bad Request: Empty HTTP Method"};
+    }
     if (allowedMethodsOpt.has_value())
     {
         allowedMethods = std::move(*allowedMethodsOpt);

webserv/http/RequestValidator.hpp

@@ -39,4 +39,6 @@ class RequestValidator
 
     [[nodiscard]] std::optional<ValidationError> validateContentLength() const;
     [[nodiscard]] std::optional<ValidationError> validateMethod() const;
+    [[nodiscard]] std::optional<ValidationError> validateHttpVersion() const;
+    [[nodiscard]] std::optional<ValidationError> validateHostHeader() const;
 };

webserv/router/Router.cpp

@@ -45,13 +45,8 @@ std::unique_ptr<AHandler> Router::handleRequest()
     Log::trace(LOCATION);
 
     HttpRequest &request = client_->getHttpRequest();
-    if (request.getState() == HttpRequest::State::ParseError)
-    {
-        Log::error("Router::handleRequest() called with incomplete request");
-
-        return nullptr;
-    }
     HttpResponse &response = client_->getHttpResponse();
+    
     const AConfig *config = request.getUri().getConfig();
 
     auto validator = std::make_unique<RequestValidator>(config, &request);