merg3

esphome/components/web_server_idf/__init__.py

@@ -1,5 +1,7 @@
-from esphome.components.esp32 import add_idf_sdkconfig_option
+from esphome.components.esp32 import add_idf_component, add_idf_sdkconfig_option
 import esphome.config_validation as cv
+from esphome.const import CONF_OTA
+from esphome.core import CORE
 
 CODEOWNERS = ["@dentra"]
 
@@ -12,3 +14,9 @@ CONFIG_SCHEMA = cv.All(
 async def to_code(config):
     # Increase the maximum supported size of headers section in HTTP request packet to be processed by the server
     add_idf_sdkconfig_option("CONFIG_HTTPD_MAX_REQ_HDR_LEN", 1024)
+
+    # Check if web_server component has OTA enabled
+    web_server_config = CORE.config.get("web_server", {})
+    if web_server_config.get(CONF_OTA, True):  # OTA is enabled by default
+        # Add multipart parser component for OTA support
+        add_idf_component(name="zorxx/multipart-parser", ref="1.0.1")

esphome/components/web_server_idf/multipart_parser.cpp

@@ -1,253 +0,0 @@
-#ifdef USE_ESP_IDF
-#ifdef USE_WEBSERVER_OTA
-#include "multipart_parser.h"
-#include "multipart_parser_utils.h"
-#include "esphome/core/log.h"
-
-namespace esphome {
-namespace web_server_idf {
-
-static const char *const TAG = "multipart_parser";
-
-// Constants for multipart parsing
-static constexpr size_t CRLF_LENGTH = 2;
-static constexpr size_t MIN_BOUNDARY_BUFFER = 4;  // Extra bytes to keep for split boundary detection
-static constexpr const char *CRLF_STR = "\r\n";
-
-bool MultipartParser::parse(const uint8_t *data, size_t len) {
-  // Append new data to buffer
-  if (data && len > 0) {
-    buffer_.insert(buffer_.end(), data, data + len);
-  }
-
-  // Limit iterations to prevent infinite loops
-  static constexpr size_t MAX_ITERATIONS = 10;
-  size_t iterations = 0;
-
-  bool made_progress = true;
-  while (made_progress && state_ != DONE && state_ != ERROR && !buffer_.empty() && iterations < MAX_ITERATIONS) {
-    made_progress = false;
-    iterations++;
-
-    switch (state_) {
-      case BOUNDARY_SEARCH:
-        if (find_boundary()) {
-          state_ = HEADERS;
-          made_progress = true;
-        }
-        break;
-
-      case HEADERS:
-        if (parse_headers()) {
-          state_ = CONTENT;
-          made_progress = true;
-        }
-        break;
-
-      case CONTENT:
-        if (extract_content()) {
-          // Content is ready, return to caller
-          return true;
-        }
-        // If we're waiting for more data in CONTENT state, exit the loop
-        return false;
-
-      default:
-        ESP_LOGE(TAG, "Invalid parser state: %d", state_);
-        state_ = ERROR;
-        break;
-    }
-  }
-
-  if (iterations >= MAX_ITERATIONS) {
-    ESP_LOGW(TAG, "Parser reached maximum iterations, possible malformed data");
-  }
-
-  return part_ready_;
-}
-
-bool MultipartParser::get_current_part(Part &part) const {
-  if (!part_ready_ || content_length_ == 0) {
-    return false;
-  }
-
-  part.name = current_name_;
-  part.filename = current_filename_;
-  part.content_type = current_content_type_;
-  part.data = buffer_.data();
-  part.length = content_length_;
-
-  return true;
-}
-
-void MultipartParser::consume_part() {
-  if (!part_ready_) {
-    return;
-  }
-
-  // Remove consumed data from buffer
-  if (content_length_ < buffer_.size()) {
-    buffer_.erase(buffer_.begin(), buffer_.begin() + content_length_);
-  } else {
-    buffer_.clear();
-  }
-
-  // Reset for next part
-  part_ready_ = false;
-  content_length_ = 0;
-  current_name_.clear();
-  current_filename_.clear();
-  current_content_type_.clear();
-
-  // Look for next boundary
-  state_ = BOUNDARY_SEARCH;
-}
-
-void MultipartParser::reset() {
-  buffer_.clear();
-  state_ = BOUNDARY_SEARCH;
-  part_ready_ = false;
-  content_length_ = 0;
-  current_name_.clear();
-  current_filename_.clear();
-  current_content_type_.clear();
-}
-
-bool MultipartParser::find_boundary() {
-  // Look for boundary in buffer
-  size_t boundary_pos = find_pattern(reinterpret_cast<const uint8_t *>(boundary_.c_str()), boundary_.length());
-
-  if (boundary_pos == std::string::npos) {
-    // Keep some data for next iteration to handle split boundaries
-    if (buffer_.size() > boundary_.length() + MIN_BOUNDARY_BUFFER) {
-      buffer_.erase(buffer_.begin(), buffer_.end() - boundary_.length() - MIN_BOUNDARY_BUFFER);
-    }
-    return false;
-  }
-
-  // Remove everything up to and including the boundary
-  buffer_.erase(buffer_.begin(), buffer_.begin() + boundary_pos + boundary_.length());
-
-  // Skip CRLF after boundary
-  if (buffer_.size() >= CRLF_LENGTH && buffer_[0] == '\r' && buffer_[1] == '\n') {
-    buffer_.erase(buffer_.begin(), buffer_.begin() + CRLF_LENGTH);
-  }
-
-  // Check if this is the end boundary
-  if (buffer_.size() >= CRLF_LENGTH && buffer_[0] == '-' && buffer_[1] == '-') {
-    state_ = DONE;
-    return false;
-  }
-
-  return true;
-}
-
-bool MultipartParser::parse_headers() {
-  // Limit header lines to prevent DOS attacks
-  static constexpr size_t MAX_HEADER_LINES = 50;
-  size_t header_count = 0;
-
-  while (header_count < MAX_HEADER_LINES) {
-    std::string line = read_line();
-    if (line.empty()) {
-      // Check if we have enough data for a line
-      auto crlf_pos = find_pattern(reinterpret_cast<const uint8_t *>(CRLF_STR), CRLF_LENGTH);
-      if (crlf_pos == std::string::npos) {
-        return false;  // Need more data
-      }
-      // Empty line means headers are done
-      buffer_.erase(buffer_.begin(), buffer_.begin() + CRLF_LENGTH);
-      return true;
-    }
-
-    process_header_line(line);
-    header_count++;
-  }
-
-  ESP_LOGW(TAG, "Too many headers in multipart data");
-  state_ = ERROR;
-  return false;
-}
-
-void MultipartParser::process_header_line(const std::string &line) {
-  if (str_startswith_case_insensitive(line, "content-disposition:")) {
-    // Extract name and filename parameters
-    current_name_ = extract_header_param(line, "name");
-    current_filename_ = extract_header_param(line, "filename");
-  } else if (str_startswith_case_insensitive(line, "content-type:")) {
-    current_content_type_ = extract_header_value(line);
-  }
-  // RFC 7578: Ignore any other Content-* headers
-}
-
-bool MultipartParser::extract_content() {
-  // Look for next boundary
-  std::string search_boundary = CRLF_STR + boundary_;
-  size_t boundary_pos =
-      find_pattern(reinterpret_cast<const uint8_t *>(search_boundary.c_str()), search_boundary.length());
-
-  if (boundary_pos != std::string::npos) {
-    // Found complete part
-    content_length_ = boundary_pos;
-    part_ready_ = true;
-    return true;
-  }
-
-  // No boundary found yet, but we might have partial content
-  // Keep enough bytes to ensure we don't split a boundary
-  size_t safe_length = buffer_.size();
-  if (safe_length > search_boundary.length() + MIN_BOUNDARY_BUFFER) {
-    safe_length -= search_boundary.length() + MIN_BOUNDARY_BUFFER;
-    if (safe_length > 0) {
-      content_length_ = safe_length;
-      // We have partial content but not complete yet
-      return false;
-    }
-  }
-
-  return false;
-}
-
-std::string MultipartParser::read_line() {
-  // Limit line length to prevent excessive memory usage
-  static constexpr size_t MAX_LINE_LENGTH = 4096;
-
-  auto crlf_pos = find_pattern(reinterpret_cast<const uint8_t *>(CRLF_STR), CRLF_LENGTH);
-  if (crlf_pos == std::string::npos) {
-    // If we have too much data without CRLF, it's likely malformed
-    if (buffer_.size() > MAX_LINE_LENGTH) {
-      ESP_LOGW(TAG, "Header line too long, truncating");
-      state_ = ERROR;
-    }
-    return "";
-  }
-
-  if (crlf_pos > MAX_LINE_LENGTH) {
-    ESP_LOGW(TAG, "Header line exceeds maximum length");
-    state_ = ERROR;
-    return "";
-  }
-
-  std::string line(buffer_.begin(), buffer_.begin() + crlf_pos);
-  buffer_.erase(buffer_.begin(), buffer_.begin() + crlf_pos + CRLF_LENGTH);
-  return line;
-}
-
-size_t MultipartParser::find_pattern(const uint8_t *pattern, size_t pattern_len, size_t start) const {
-  if (buffer_.size() < pattern_len + start) {
-    return std::string::npos;
-  }
-
-  for (size_t i = start; i <= buffer_.size() - pattern_len; ++i) {
-    if (memcmp(buffer_.data() + i, pattern, pattern_len) == 0) {
-      return i;
-    }
-  }
-
-  return std::string::npos;
-}
-
-}  // namespace web_server_idf
-}  // namespace esphome
-#endif  // USE_WEBSERVER_OTA
-#endif  // USE_ESP_IDF

esphome/components/web_server_idf/multipart_parser.h

@@ -1,75 +0,0 @@
-#pragma once
-#ifdef USE_ESP_IDF
-#ifdef USE_WEBSERVER_OTA
-
-#include <string>
-#include <vector>
-#include <cstring>
-
-namespace esphome {
-namespace web_server_idf {
-
-// Multipart form data parser for ESP-IDF
-// Implements RFC 7578 compliant multipart/form-data parsing
-class MultipartParser {
- public:
-  static constexpr const char *MULTIPART_BOUNDARY_PREFIX = "--";
-
-  enum State : uint8_t { BOUNDARY_SEARCH, HEADERS, CONTENT, DONE, ERROR };
-
-  struct Part {
-    std::string name;
-    std::string filename;
-    std::string content_type;
-    const uint8_t *data;
-    size_t length;
-  };
-
-  explicit MultipartParser(const std::string &boundary)
-      : boundary_(MULTIPART_BOUNDARY_PREFIX + boundary),
-        state_(BOUNDARY_SEARCH),
-        content_length_(0),
-        part_ready_(false) {}
-
-  // Process incoming data chunk
-  // Returns true if a complete part is available
-  bool parse(const uint8_t *data, size_t len);
-
-  // Get the current part if available
-  bool get_current_part(Part &part) const;
-
-  // Consume the current part and move to next
-  void consume_part();
-
-  State get_state() const { return state_; }
-  bool is_done() const { return state_ == DONE; }
-  bool has_error() const { return state_ == ERROR; }
-
-  // Reset parser for reuse
-  void reset();
-
- private:
-  bool find_boundary();
-  bool parse_headers();
-  void process_header_line(const std::string &line);
-  bool extract_content();
-
-  std::string read_line();
-  size_t find_pattern(const uint8_t *pattern, size_t pattern_len, size_t start = 0) const;
-
-  std::string boundary_;
-  State state_;
-  std::vector<uint8_t> buffer_;
-
-  // Current part info
-  std::string current_name_;
-  std::string current_filename_;
-  std::string current_content_type_;
-  size_t content_length_{0};
-  bool part_ready_{false};
-};
-
-}  // namespace web_server_idf
-}  // namespace esphome
-#endif  // USE_WEBSERVER_OTA
-#endif  // USE_ESP_IDF

esphome/components/web_server_idf/multipart_reader.cpp

@@ -0,0 +1,193 @@
+#ifdef USE_ESP_IDF
+#ifdef USE_WEBSERVER_OTA
+#include "multipart_reader.h"
+#include "esphome/core/log.h"
+#include <cstring>
+#include <cctype>
+
+namespace esphome {
+namespace web_server_idf {
+
+static const char *const TAG = "multipart_reader";
+
+MultipartReader::MultipartReader(const std::string &boundary) {
+  // Initialize settings with callbacks
+  memset(&settings_, 0, sizeof(settings_));
+  settings_.on_header_field = on_header_field;
+  settings_.on_header_value = on_header_value;
+  settings_.on_part_data_begin = on_part_data_begin;
+  settings_.on_part_data = on_part_data;
+  settings_.on_part_data_end = on_part_data_end;
+  settings_.on_headers_complete = on_headers_complete;
+
+  // Create parser with boundary
+  parser_ = multipart_parser_init(boundary.c_str(), &settings_);
+  if (parser_) {
+    multipart_parser_set_data(parser_, this);
+  }
+}
+
+MultipartReader::~MultipartReader() {
+  if (parser_) {
+    multipart_parser_free(parser_);
+  }
+}
+
+size_t MultipartReader::parse(const char *data, size_t len) {
+  if (!parser_) {
+    return 0;
+  }
+  return multipart_parser_execute(parser_, data, len);
+}
+
+int MultipartReader::on_header_field(multipart_parser *parser, const char *at, size_t length) {
+  MultipartReader *reader = static_cast<MultipartReader *>(multipart_parser_get_data(parser));
+
+  // If we were processing a value, save it
+  if (!reader->current_header_value_.empty()) {
+    // Process the previous header
+    std::string field_lower = reader->current_header_field_;
+    std::transform(field_lower.begin(), field_lower.end(), field_lower.begin(), ::tolower);
+
+    if (field_lower == "content-disposition") {
+      // Parse name and filename from Content-Disposition
+      size_t name_pos = reader->current_header_value_.find("name=");
+      if (name_pos != std::string::npos) {
+        name_pos += 5;
+        size_t end_pos;
+        if (reader->current_header_value_[name_pos] == '"') {
+          name_pos++;
+          end_pos = reader->current_header_value_.find('"', name_pos);
+        } else {
+          end_pos = reader->current_header_value_.find_first_of("; \r\n", name_pos);
+        }
+        if (end_pos != std::string::npos) {
+          reader->current_part_.name = reader->current_header_value_.substr(name_pos, end_pos - name_pos);
+        }
+      }
+
+      size_t filename_pos = reader->current_header_value_.find("filename=");
+      if (filename_pos != std::string::npos) {
+        filename_pos += 9;
+        size_t end_pos;
+        if (reader->current_header_value_[filename_pos] == '"') {
+          filename_pos++;
+          end_pos = reader->current_header_value_.find('"', filename_pos);
+        } else {
+          end_pos = reader->current_header_value_.find_first_of("; \r\n", filename_pos);
+        }
+        if (end_pos != std::string::npos) {
+          reader->current_part_.filename = reader->current_header_value_.substr(filename_pos, end_pos - filename_pos);
+        }
+      }
+    } else if (field_lower == "content-type") {
+      reader->current_part_.content_type = reader->current_header_value_;
+    }
+
+    reader->current_header_value_.clear();
+  }
+
+  // Start new header field
+  reader->current_header_field_.assign(at, length);
+  reader->in_headers_ = true;
+
+  return 0;
+}
+
+int MultipartReader::on_header_value(multipart_parser *parser, const char *at, size_t length) {
+  MultipartReader *reader = static_cast<MultipartReader *>(multipart_parser_get_data(parser));
+  reader->current_header_value_.append(at, length);
+  return 0;
+}
+
+int MultipartReader::on_headers_complete(multipart_parser *parser) {
+  MultipartReader *reader = static_cast<MultipartReader *>(multipart_parser_get_data(parser));
+
+  // Process last header if any
+  if (!reader->current_header_value_.empty()) {
+    std::string field_lower = reader->current_header_field_;
+    std::transform(field_lower.begin(), field_lower.end(), field_lower.begin(), ::tolower);
+
+    if (field_lower == "content-disposition") {
+      // Parse name and filename from Content-Disposition
+      size_t name_pos = reader->current_header_value_.find("name=");
+      if (name_pos != std::string::npos) {
+        name_pos += 5;
+        size_t end_pos;
+        if (reader->current_header_value_[name_pos] == '"') {
+          name_pos++;
+          end_pos = reader->current_header_value_.find('"', name_pos);
+        } else {
+          end_pos = reader->current_header_value_.find_first_of("; \r\n", name_pos);
+        }
+        if (end_pos != std::string::npos) {
+          reader->current_part_.name = reader->current_header_value_.substr(name_pos, end_pos - name_pos);
+        }
+      }
+
+      size_t filename_pos = reader->current_header_value_.find("filename=");
+      if (filename_pos != std::string::npos) {
+        filename_pos += 9;
+        size_t end_pos;
+        if (reader->current_header_value_[filename_pos] == '"') {
+          filename_pos++;
+          end_pos = reader->current_header_value_.find('"', filename_pos);
+        } else {
+          end_pos = reader->current_header_value_.find_first_of("; \r\n", filename_pos);
+        }
+        if (end_pos != std::string::npos) {
+          reader->current_part_.filename = reader->current_header_value_.substr(filename_pos, end_pos - filename_pos);
+        }
+      }
+    } else if (field_lower == "content-type") {
+      reader->current_part_.content_type = reader->current_header_value_;
+    }
+  }
+
+  reader->in_headers_ = false;
+  reader->current_header_field_.clear();
+  reader->current_header_value_.clear();
+
+  ESP_LOGD(TAG, "Part headers complete: name='%s', filename='%s', content_type='%s'",
+           reader->current_part_.name.c_str(), reader->current_part_.filename.c_str(),
+           reader->current_part_.content_type.c_str());
+
+  return 0;
+}
+
+int MultipartReader::on_part_data_begin(multipart_parser *parser) {
+  MultipartReader *reader = static_cast<MultipartReader *>(multipart_parser_get_data(parser));
+  ESP_LOGD(TAG, "Part data begin");
+  return 0;
+}
+
+int MultipartReader::on_part_data(multipart_parser *parser, const char *at, size_t length) {
+  MultipartReader *reader = static_cast<MultipartReader *>(multipart_parser_get_data(parser));
+
+  // Only process file uploads
+  if (reader->has_file() && reader->data_callback_) {
+    reader->data_callback_(reinterpret_cast<const uint8_t *>(at), length);
+  }
+
+  return 0;
+}
+
+int MultipartReader::on_part_data_end(multipart_parser *parser) {
+  MultipartReader *reader = static_cast<MultipartReader *>(multipart_parser_get_data(parser));
+
+  ESP_LOGD(TAG, "Part data end");
+
+  if (reader->part_complete_callback_) {
+    reader->part_complete_callback_();
+  }
+
+  // Clear part info for next part
+  reader->current_part_ = Part{};
+
+  return 0;
+}
+
+}  // namespace web_server_idf
+}  // namespace esphome
+#endif  // USE_WEBSERVER_OTA
+#endif  // USE_ESP_IDF

esphome/components/web_server_idf/multipart_reader.h

@@ -0,0 +1,65 @@
+#pragma once
+#ifdef USE_ESP_IDF
+#ifdef USE_WEBSERVER_OTA
+
+#include <esp_http_server.h>
+#include <multipart_parser.h>
+#include <string>
+#include <functional>
+
+namespace esphome {
+namespace web_server_idf {
+
+// Wrapper around zorxx/multipart-parser for ESP-IDF OTA uploads
+class MultipartReader {
+ public:
+  struct Part {
+    std::string name;
+    std::string filename;
+    std::string content_type;
+  };
+
+  using DataCallback = std::function<void(const uint8_t *data, size_t len)>;
+  using PartCompleteCallback = std::function<void()>;
+
+  explicit MultipartReader(const std::string &boundary);
+  ~MultipartReader();
+
+  // Set callbacks for handling data
+  void set_data_callback(DataCallback callback) { data_callback_ = callback; }
+  void set_part_complete_callback(PartCompleteCallback callback) { part_complete_callback_ = callback; }
+
+  // Parse incoming data
+  size_t parse(const char *data, size_t len);
+
+  // Get current part info
+  const Part &get_current_part() const { return current_part_; }
+
+  // Check if we found a file upload
+  bool has_file() const { return !current_part_.filename.empty(); }
+
+ private:
+  static int on_header_field(multipart_parser *parser, const char *at, size_t length);
+  static int on_header_value(multipart_parser *parser, const char *at, size_t length);
+  static int on_part_data_begin(multipart_parser *parser);
+  static int on_part_data(multipart_parser *parser, const char *at, size_t length);
+  static int on_part_data_end(multipart_parser *parser);
+  static int on_headers_complete(multipart_parser *parser);
+
+  multipart_parser *parser_{nullptr};
+  multipart_parser_settings settings_{};
+
+  Part current_part_;
+  std::string current_header_field_;
+  std::string current_header_value_;
+
+  DataCallback data_callback_;
+  PartCompleteCallback part_complete_callback_;
+
+  bool in_headers_{false};
+};
+
+}  // namespace web_server_idf
+}  // namespace esphome
+#endif  // USE_WEBSERVER_OTA
+#endif  // USE_ESP_IDF

esphome/components/web_server_idf/web_server_idf.cpp

@@ -9,8 +9,7 @@
 
 #include "utils.h"
 #ifdef USE_WEBSERVER_OTA
-#include "multipart_parser.h"
-#include "multipart_parser_utils.h"
+#include "multipart_reader.h"
 #endif
 
 #include "web_server_idf.h"
@@ -79,16 +78,30 @@ esp_err_t AsyncWebServer::request_post_handler(httpd_req_t *r) {
 
 #ifdef USE_WEBSERVER_OTA
   // Check if this is a multipart form data request (for OTA updates)
-  const char *boundary_start = nullptr;
-  size_t boundary_len = 0;
   bool is_multipart = false;
+  std::string boundary;
 
   if (content_type.has_value()) {
-    const char *ct = content_type.value().c_str();
-    is_multipart = parse_multipart_boundary(ct, &boundary_start, &boundary_len);
+    const std::string &ct = content_type.value();
+    size_t boundary_pos = ct.find("boundary=");
+    if (boundary_pos != std::string::npos) {
+      boundary_pos += 9;  // Skip "boundary="
+      size_t boundary_end = ct.find_first_of(" ;\r\n", boundary_pos);
+      if (boundary_end == std::string::npos) {
+        boundary_end = ct.length();
+      }
+      if (ct[boundary_pos] == '"' && boundary_end > boundary_pos + 1 && ct[boundary_end - 1] == '"') {
+        // Quoted boundary
+        boundary = ct.substr(boundary_pos + 1, boundary_end - boundary_pos - 2);
+      } else {
+        // Unquoted boundary
+        boundary = ct.substr(boundary_pos, boundary_end - boundary_pos);
+      }
+      is_multipart = ct.find("multipart/form-data") != std::string::npos && !boundary.empty();
+    }
 
-    if (!is_multipart && !is_form_urlencoded(ct)) {
-      ESP_LOGW(TAG, "Unsupported content type for POST: %s", ct);
+    if (!is_multipart && ct.find("application/x-www-form-urlencoded") == std::string::npos) {
+      ESP_LOGW(TAG, "Unsupported content type for POST: %s", ct.c_str());
       // fallback to get handler to support backward compatibility
       return AsyncWebServer::request_handler(r);
     }
@@ -109,7 +122,7 @@ esp_err_t AsyncWebServer::request_post_handler(httpd_req_t *r) {
 
 #ifdef USE_WEBSERVER_OTA
   // Handle multipart form data
-  if (is_multipart && boundary_start && boundary_len > 0) {
+  if (is_multipart && !boundary.empty()) {
     // Create request object
     AsyncWebServerRequest req(r);
     auto *server = static_cast<AsyncWebServer *>(r->user_ctx);
@@ -128,18 +141,36 @@ esp_err_t AsyncWebServer::request_post_handler(httpd_req_t *r) {
       return ESP_OK;
     }
 
-    // Handle multipart upload - create boundary string only when needed
-    std::string boundary(boundary_start, boundary_len);
-    MultipartParser parser(boundary);
+    // Handle multipart upload using the multipart-parser library
+    MultipartReader reader(boundary);
     static constexpr size_t CHUNK_SIZE = 1024;
-    uint8_t *chunk_buf = new uint8_t[CHUNK_SIZE];
+    char *chunk_buf = new char[CHUNK_SIZE];
     size_t total_len = r->content_len;
     size_t remaining = total_len;
-    bool first_part = true;
+    std::string current_filename;
+    bool upload_started = false;
+
+    // Set up callbacks for the multipart reader
+    reader.set_data_callback([&](const uint8_t *data, size_t len) {
+      if (!current_filename.empty()) {
+        found_handler->handleUpload(&req, current_filename, upload_started ? 1 : 0, const_cast<uint8_t *>(data), len,
+                                    false);
+        upload_started = true;
+      }
+    });
+
+    reader.set_part_complete_callback([&]() {
+      if (!current_filename.empty() && upload_started) {
+        // Signal end of this part
+        found_handler->handleUpload(&req, current_filename, 2, nullptr, 0, false);
+        current_filename.clear();
+        upload_started = false;
+      }
+    });
 
     while (remaining > 0) {
       size_t to_read = std::min(remaining, CHUNK_SIZE);
-      int recv_len = httpd_req_recv(r, reinterpret_cast<char *>(chunk_buf), to_read);
+      int recv_len = httpd_req_recv(r, chunk_buf, to_read);
 
       if (recv_len <= 0) {
         delete[] chunk_buf;
@@ -152,23 +183,25 @@ esp_err_t AsyncWebServer::request_post_handler(httpd_req_t *r) {
       }
 
       // Parse multipart data
-      if (parser.parse(chunk_buf, recv_len)) {
-        MultipartParser::Part part;
-        if (parser.get_current_part(part) && !part.filename.empty()) {
-          // This is a file upload
-          found_handler->handleUpload(&req, part.filename, first_part ? 0 : 1, const_cast<uint8_t *>(part.data),
-                                      part.length, false);
-          first_part = false;
-          parser.consume_part();
+      size_t parsed = reader.parse(chunk_buf, recv_len);
+      if (parsed != recv_len) {
+        ESP_LOGW(TAG, "Multipart parser error at byte %zu", total_len - remaining + parsed);
+        delete[] chunk_buf;
+        httpd_resp_send_err(r, HTTPD_400_BAD_REQUEST, nullptr);
+        return ESP_FAIL;
       }
+
+      // Check if we found a new file part
+      if (reader.has_file() && current_filename.empty()) {
+        current_filename = reader.get_current_part().filename;
       }
 
       remaining -= recv_len;
     }
 
-    // Final call to handler
-    if (!first_part) {
-      found_handler->handleUpload(&req, "", 2, nullptr, 0, true);
+    // Final cleanup - send final signal if upload was in progress
+    if (!current_filename.empty() && upload_started) {
+      found_handler->handleUpload(&req, current_filename, 2, nullptr, 0, true);
     }
 
     delete[] chunk_buf;