From 0761329c61e4469894bc24337a13b70981e09705 Mon Sep 17 00:00:00 2001
From: levlam <levlam@telegram.org>
Date: Thu, 29 Feb 2024 19:38:57 +0300
Subject: [PATCH] Remove explicit limit on HTTP chunk size.

---
 tdnet/td/net/HttpChunkedByteFlow.cpp | 8 ++------
 tdnet/td/net/HttpChunkedByteFlow.h   | 1 -
 2 files changed, 2 insertions(+), 7 deletions(-)

diff --git a/tdnet/td/net/HttpChunkedByteFlow.cpp b/tdnet/td/net/HttpChunkedByteFlow.cpp
index cc8e533c3..38510a875 100644
--- a/tdnet/td/net/HttpChunkedByteFlow.cpp
+++ b/tdnet/td/net/HttpChunkedByteFlow.cpp
@@ -19,7 +19,7 @@ bool HttpChunkedByteFlow::loop() {
   do {
     if (state_ == State::ReadChunkLength) {
       bool ok = find_boundary(input_->clone(), "\r\n", len_);
-      if (len_ > 10) {
+      if (len_ > 8) {
         finish(Status::Error(PSLICE() << "Too long length in chunked "
                                       << input_->cut_head(len_).move_as_buffer_slice().as_slice()));
         return false;
@@ -31,17 +31,13 @@ bool HttpChunkedByteFlow::loop() {
       auto s_len = input_->cut_head(len_).move_as_buffer_slice();
       input_->advance(2);
       len_ = hex_to_integer<size_t>(s_len.as_slice());
-      if (len_ > MAX_CHUNK_SIZE) {
-        finish(Status::Error(PSLICE() << "Invalid chunk size " << tag("size", len_)));
-        return false;
-      }
       save_len_ = len_;
       state_ = State::ReadChunkContent;
     }
 
     auto size = input_->size();
     auto ready = min(len_, size);
-    auto need_size = min(MIN_UPDATE_SIZE, len_ + 2);
+    auto need_size = min(MIN_UPDATE_SIZE, len_) + 2;
     if (size < need_size) {
       set_need_size(need_size);
       break;
diff --git a/tdnet/td/net/HttpChunkedByteFlow.h b/tdnet/td/net/HttpChunkedByteFlow.h
index db68ea68f..1f6a3e354 100644
--- a/tdnet/td/net/HttpChunkedByteFlow.h
+++ b/tdnet/td/net/HttpChunkedByteFlow.h
@@ -17,7 +17,6 @@ class HttpChunkedByteFlow final : public ByteFlowBase {
   bool loop() final;
 
  private:
-  static constexpr size_t MAX_CHUNK_SIZE = 15 << 20;                      // some reasonable limit
   static constexpr size_t MAX_SIZE = std::numeric_limits<uint32>::max();  // some reasonable limit
   static constexpr size_t MIN_UPDATE_SIZE = 1 << 14;
   enum class State { ReadChunkLength, ReadChunkContent, OK };