Add multipart/form-data tests.

test/http.cpp

@@ -464,6 +464,67 @@ TEST(Http, gzip_bomb_with_limit) {
   ASSERT_TRUE(ok);
 }
 
+TEST(Http, partial_form_data) {
+  td::ChainBufferWriter input_writer;
+  auto input = input_writer.extract_reader();
+
+  td::HttpReader reader;
+  reader.init(&input, 0, 0);
+
+  auto query =
+      make_http_query("------abcd\r\nCo", "Content-Type: multipart/form-data; boundary=----abcd", false, false);
+  input_writer.append(query);
+  input.sync_with_writer();
+
+  td::HttpQuery q;
+  auto r_state = reader.read_next(&q);
+  ASSERT_TRUE(r_state.is_error());
+  ASSERT_EQ(400, r_state.error().code());
+}
+
+TEST(Http, form_data) {
+  td::ChainBufferWriter input_writer;
+  auto input = input_writer.extract_reader();
+
+  td::HttpReader reader;
+  reader.init(&input, 0, 1);
+
+  auto query = make_http_query(
+      "------abcd\r\n"
+      "Content-Disposition: form-data; name=\"text\"\r\n"
+      "\r\n"
+      "some text\r\n"
+      "------abcd\r\n"
+      "Content-Disposition: form-data; name=\"text2\"\r\n"
+      "\r\n"
+      "some text\r\n"
+      "more text\r\n"
+      "------abcd\r\n"
+      "Content-Disposition: form-data; name=\"file\"; filename=\"file.txt\"\r\n"
+      "Content-Type: text/plain\r\n"
+      "\r\n"
+      "File content\r\n"
+      "------abcd--",
+      "Content-Type: multipart/form-data; boundary=----abcd", false, false);
+  input_writer.append(query);
+  input.sync_with_writer();
+
+  td::HttpQuery q;
+  auto r_state = reader.read_next(&q);
+  ASSERT_TRUE(r_state.is_ok());
+  ASSERT_EQ(2u, q.args_.size());
+  ASSERT_EQ("text", q.args_[0].first);
+  ASSERT_EQ("some text", q.args_[0].second);
+  ASSERT_EQ("text2", q.args_[1].first);
+  ASSERT_EQ("some text\r\nmore text", q.args_[1].second);
+  ASSERT_EQ(1u, q.files_.size());
+  ASSERT_EQ("file.txt", q.files_[0].name);
+  ASSERT_EQ("file", q.files_[0].field_name);
+  ASSERT_EQ("text/plain", q.files_[0].content_type);
+  ASSERT_EQ(12, q.files_[0].size);
+  ASSERT_TRUE(!q.files_[0].temp_file_name.empty());
+}
+
 #if TD_DARWIN_WATCH_OS
 struct Baton {
   std::mutex mutex;