Support include empty config file.

trunk/configure

@@ -434,7 +434,7 @@ fi
 if [[ $SRS_UTEST == YES ]]; then
     MODULE_FILES=("srs_utest" "srs_utest_amf0" "srs_utest_kernel" "srs_utest_core"
         "srs_utest_config" "srs_utest_rtmp" "srs_utest_http" "srs_utest_avc" "srs_utest_reload"
-        "srs_utest_mp4" "srs_utest_service" "srs_utest_app" "srs_utest_rtc"
+        "srs_utest_mp4" "srs_utest_service" "srs_utest_app" "srs_utest_rtc" "srs_utest_config2"
         "srs_utest_protocol" "srs_utest_protocol2" "srs_utest_kernel2")
     if [[ $SRS_SRT == YES ]]; then
         MODULE_FILES+=("srs_utest_srt")

trunk/src/app/srs_app_config.cpp

@@ -123,6 +123,8 @@ namespace srs_internal
 
         // read all.
         int filesize = (int)reader.filesize();
+        // Ignore if empty file.
+        if (filesize <= 0) return err;
 
         // create buffer
         srs_freepa(start);
@@ -1068,6 +1070,9 @@ SrsJsonAny* SrsConfDirective::dumps_arg0_to_boolean()
 srs_error_t SrsConfDirective::parse_conf(SrsConfigBuffer* buffer, SrsDirectiveContext ctx, SrsConfig* conf)
 {
     srs_error_t err = srs_success;
+
+    // Ignore empty config file.
+    if (buffer->empty()) return err;
 
     while (true) {
         std::vector<string> args;

trunk/src/utest/srs_utest_config.cpp

@@ -85,11 +85,14 @@ srs_error_t MockSrsConfig::build_buffer(std::string src, srs_internal::SrsConfig
 {
     srs_error_t err = srs_success;
 
-    string content = included_files[src];
-    if(content.empty()) {
+    // No file, error.
+    if(included_files.find(src) == included_files.end()) {
         return srs_error_new(ERROR_SYSTEM_CONFIG_INVALID, "file %s: no found", src.c_str());
     }
 
+    string content = included_files[src];
+
+    // Empty file, ok.
     *pbuffer = new MockSrsConfigBuffer(content);
 
     return err;

trunk/src/utest/srs_utest_config2.cpp

@@ -0,0 +1,47 @@
+//
+// Copyright (c) 2013-2023 The SRS Authors
+//
+// SPDX-License-Identifier: MIT or MulanPSL-2.0
+//
+#include <srs_utest_config2.hpp>
+
+#include <srs_kernel_error.hpp>
+#include <srs_kernel_file.hpp>
+#include <srs_utest_kernel.hpp>
+
+VOID TEST(ConfigMainTest, CheckIncludeEmptyConfig)
+{
+    srs_error_t err;
+
+    if (true) {
+        string filepath = _srs_tmp_file_prefix + "utest-main.conf";
+        MockFileRemover _mfr(filepath);
+
+        string included = _srs_tmp_file_prefix + "utest-included-empty.conf";
+        MockFileRemover _mfr2(included);
+
+        if (true) {
+            SrsFileWriter fw;
+            fw.open(included);
+        }
+
+        if (true) {
+            SrsFileWriter fw;
+            fw.open(filepath);
+            string content = _MIN_OK_CONF "include " + included + ";";
+            fw.write((void*)content.data(), (int)content.length(), NULL);
+        }
+
+        SrsConfig conf;
+        HELPER_ASSERT_SUCCESS(conf.parse_file(filepath.c_str()));
+        EXPECT_EQ(1, (int)conf.get_listens().size());
+    }
+
+    if (true) {
+        MockSrsConfig conf;
+        conf.mock_include("test.conf", "");
+        HELPER_ASSERT_SUCCESS(conf.parse(_MIN_OK_CONF "include test.conf;"));
+        EXPECT_EQ(1, (int)conf.get_listens().size());
+    }
+}
+

trunk/src/utest/srs_utest_config2.hpp

@@ -0,0 +1,16 @@
+//
+// Copyright (c) 2013-2023 The SRS Authors
+//
+// SPDX-License-Identifier: MIT or MulanPSL-2.0
+//
+
+#ifndef SRS_UTEST_CONFIG2_HPP
+#define SRS_UTEST_CONFIG2_HPP
+
+/*
+#include <srs_utest_config2.hpp>
+*/
+#include <srs_utest_config.hpp>
+
+#endif
+