diff --git a/td/mtproto/AuthData.h b/td/mtproto/AuthData.h
index 7293ffd1c..6e6af1fb6 100644
--- a/td/mtproto/AuthData.h
+++ b/td/mtproto/AuthData.h
@@ -148,7 +148,7 @@ class AuthData {
     tmp_auth_key_.set_auth_flag(true);
   }
 
-  Slice header() {
+  Slice get_header() {
     if (use_pfs()) {
       return tmp_auth_key_.need_header() ? Slice(header_) : Slice();
     } else {
diff --git a/td/mtproto/SessionConnection.cpp b/td/mtproto/SessionConnection.cpp
index 4b78d783f..ac4798048 100644
--- a/td/mtproto/SessionConnection.cpp
+++ b/td/mtproto/SessionConnection.cpp
@@ -869,9 +869,9 @@ void SessionConnection::flush_packet() {
   {
     uint64 parent_message_id = 0;
     auto storer = PacketStorer<CryptoImpl>(
-        queries, auth_data_->header(), std::move(to_ack), ping_id, ping_disconnect_delay() + 2, max_delay, max_after,
-        max_wait, future_salt_n, to_get_state_info, to_resend_answer, to_cancel_answer, auth_data_, &container_id,
-        &get_state_info_id, &resend_answer_id, &ping_message_id, &parent_message_id);
+        queries, auth_data_->get_header(), std::move(to_ack), ping_id, ping_disconnect_delay() + 2, max_delay,
+        max_after, max_wait, future_salt_n, to_get_state_info, to_resend_answer, to_cancel_answer, auth_data_,
+        &container_id, &get_state_info_id, &resend_answer_id, &ping_message_id, &parent_message_id);
 
     auto quick_ack_token = use_quick_ack ? parent_message_id : 0;
     send_crypto(storer, quick_ack_token);
diff --git a/td/telegram/cli.cpp b/td/telegram/cli.cpp
index 3cd908f37..8f7aa4e4e 100644
--- a/td/telegram/cli.cpp
+++ b/td/telegram/cli.cpp
@@ -1092,11 +1092,11 @@ class CliClient final : public Actor {
         LOG(ERROR) << status.error();
         return;
       }
-      string bot_id = query.arg("bot_id").str();
-      string scope = query.arg("scope").str();
-      string public_key = query.arg("public_key").str();
-      string payload = query.arg("payload").str();
-      LOG(ERROR) << query.arg("callback_url");
+      string bot_id = query.get_arg("bot_id").str();
+      string scope = query.get_arg("scope").str();
+      string public_key = query.get_arg("public_key").str();
+      string payload = query.get_arg("payload").str();
+      LOG(ERROR) << query.get_arg("callback_url");
       send_request(make_tl_object<td_api::getPassportAuthorizationForm>(to_integer<int32>(bot_id), scope, public_key,
                                                                         payload, password));
     } else if (op == "spaf") {
diff --git a/tdnet/td/net/HttpQuery.cpp b/tdnet/td/net/HttpQuery.cpp
index 9f557abe1..9a34b66b4 100644
--- a/tdnet/td/net/HttpQuery.cpp
+++ b/tdnet/td/net/HttpQuery.cpp
@@ -12,28 +12,29 @@
 
 namespace td {
 
-Slice HttpQuery::header(Slice key) const {
+Slice HttpQuery::get_header(Slice key) const {
   auto it = std::find_if(headers_.begin(), headers_.end(),
                          [&key](const std::pair<MutableSlice, MutableSlice> &s) { return s.first == key; });
   return it == headers_.end() ? Slice() : it->second;
 }
 
-MutableSlice HttpQuery::arg(Slice key) const {
+MutableSlice HttpQuery::get_arg(Slice key) const {
   auto it = std::find_if(args_.begin(), args_.end(),
                          [&key](const std::pair<MutableSlice, MutableSlice> &s) { return s.first == key; });
   return it == args_.end() ? MutableSlice() : it->second;
 }
 
-std::vector<std::pair<string, string>> HttpQuery::string_args() const {
+std::vector<std::pair<string, string>> HttpQuery::get_args() const {
   std::vector<std::pair<string, string>> res;
+  res.reserve(args_.size());
   for (auto &it : args_) {
-    res.push_back(std::make_pair(it.first.str(), it.second.str()));
+    res.emplace_back(it.first.str(), it.second.str());
   }
   return res;
 }
 
 int HttpQuery::get_retry_after() const {
-  auto value = header("retry-after");
+  auto value = get_header("retry-after");
   if (value.empty()) {
     return 0;
   }
diff --git a/tdnet/td/net/HttpQuery.h b/tdnet/td/net/HttpQuery.h
index bb304556d..1bbf100f1 100644
--- a/tdnet/td/net/HttpQuery.h
+++ b/tdnet/td/net/HttpQuery.h
@@ -33,11 +33,11 @@ class HttpQuery {
   std::vector<HttpFile> files_;
   MutableSlice content_;
 
-  Slice header(Slice key) const;
+  Slice get_header(Slice key) const;
 
-  MutableSlice arg(Slice key) const;
+  MutableSlice get_arg(Slice key) const;
 
-  std::vector<std::pair<string, string>> string_args() const;
+  std::vector<std::pair<string, string>> get_args() const;
 
   int get_retry_after() const;
 };
diff --git a/tdnet/td/net/Wget.cpp b/tdnet/td/net/Wget.cpp
index b30128be3..29c6a2e70 100644
--- a/tdnet/td/net/Wget.cpp
+++ b/tdnet/td/net/Wget.cpp
@@ -52,16 +52,23 @@ Status Wget::try_init() {
   HttpHeaderCreator hc;
   hc.init_get(url.query_);
   bool was_host = false;
+  bool was_accept_encoding = false;
   for (auto &header : headers_) {
-    if (header.first == "Host") {  // TODO: lowercase
+    auto header_lower = to_lower(header.first);
+    if (header_lower == "host") {
       was_host = true;
     }
+    if (header_lower == "accept-encoding") {
+      was_accept_encoding = true;
+    }
     hc.add_header(header.first, header.second);
   }
   if (!was_host) {
     hc.add_header("Host", url.host_);
   }
-  hc.add_header("Accept-Encoding", "gzip, deflate");
+  if (!was_accept_encoding) {
+    hc.add_header("Accept-Encoding", "gzip, deflate");
+  }
 
   send_closure(connection_, &HttpOutboundConnection::write_next, BufferSlice(hc.finish().ok()));
   send_closure(connection_, &HttpOutboundConnection::write_ok);
@@ -89,7 +96,7 @@ void Wget::on_ok(HttpQueryPtr http_query_ptr) {
   CHECK(promise_);
   if (http_query_ptr->code_ == 302 && ttl_ > 0) {
     LOG(DEBUG) << *http_query_ptr;
-    input_url_ = http_query_ptr->header("location").str();
+    input_url_ = http_query_ptr->get_header("location").str();
     LOG(DEBUG) << input_url_;
     ttl_--;
     connection_.reset();
@@ -98,7 +105,7 @@ void Wget::on_ok(HttpQueryPtr http_query_ptr) {
     promise_.set_value(std::move(http_query_ptr));
     stop();
   } else {
-    on_error(Status::Error(PSLICE() << "http error: " << http_query_ptr->code_));
+    on_error(Status::Error(PSLICE() << "HTTP error: " << http_query_ptr->code_));
   }
 }