diff --git a/CMakeLists.txt b/CMakeLists.txt
index 8bb09a1..755e17a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -53,6 +53,7 @@ target_include_directories(sled PUBLIC src/ 3party/eigen 3party/inja
 target_sources(
   sled
   PRIVATE src/sled/async/async.cc
+          src/sled/config.cc
           src/sled/debugging/demangle.cc
           src/sled/debugging/symbolize.cc
           src/sled/event_bus/event_bus.cc
@@ -194,6 +195,7 @@ if(SLED_BUILD_TESTS)
   sled_add_test(NAME sled_string_view_test SRCS
                 src/sled/nonstd/string_view_test.cc)
   sled_add_test(NAME sled_expected_test SRCS src/sled/nonstd/expected_test.cc)
+  sled_add_test(NAME sled_config_test SRCS src/sled//config_test.cc)
 endif(SLED_BUILD_TESTS)
 
 if(SLED_BUILD_FUZZ)
diff --git a/src/sled/config.cc b/src/sled/config.cc
new file mode 100644
index 0000000..14182e9
--- /dev/null
+++ b/src/sled/config.cc
@@ -0,0 +1,228 @@
+#include "sled/config.h"
+#include "sled/log/log.h"
+#include "sled/strings/utils.h"
+#include <fstream>
+
+namespace sled {
+Config::Config() = default;
+
+Config::Config(sled::string_view name) : Config(name, "") {}
+
+Config::Config(sled::string_view name, sled::string_view path) : config_name_(name)
+{
+    config_paths_.emplace_back(path.to_string());
+}
+
+void
+Config::SetConfigName(sled::string_view name)
+{
+    config_name_ = name.to_string();
+}
+
+void
+Config::AddConfigPath(sled::string_view path)
+{
+    config_paths_.emplace_back(path.to_string());
+}
+
+bool
+Config::ReadInConfig()
+{
+    const static std::vector<std::string> extensions = {".toml"};
+    for (const auto &path : config_paths_) {
+        auto name = path + config_name_;
+        for (const auto &ext : extensions) {
+            const std::ifstream file(name + ext);
+            if (file.good()) {
+                try {
+                    std::stringstream ss;
+                    ss << file.rdbuf();
+
+                    std::istringstream stream_data(ss.str(), std::ios_base::binary | std::ios_base::in);
+                    toml_ = toml::parse(stream_data, "string");
+                    return true;
+                    // goto config_read_success;
+                } catch (...) {
+                    LOGD("Failed to parse config file: {}", name + ext);
+                }
+            }
+        }
+    }
+
+    // config_read_success:
+    //     // pair<key, value>
+    //     for (auto &pair : default_values_) {
+    //         toml::value value;
+    //         if (!GetNode(pair.first, value)) { AddDefaultNode(pair.first, pair.second); }
+    //     }
+
+    return false;
+}
+
+bool
+Config::IsSet(sled::string_view key) const
+{
+    toml::value value;
+    return GetNode(key, value);
+}
+
+bool
+Config::GetBoolOr(sled::string_view key, const bool &def) const
+{
+    toml::value value;
+    try {
+        if (GetNode(key, value) && value.is_boolean()) { return value.as_boolean(); }
+    } catch (...) {}
+    return def;
+}
+
+int
+Config::GetIntOr(sled::string_view key, const int &def) const
+{
+    toml::value value;
+    try {
+        if (GetNode(key, value)) {
+            if (value.is_integer()) {
+                return value.as_integer();
+            } else if (value.is_boolean()) {
+                return value.as_boolean() ? 1 : 0;
+            } else if (value.is_floating()) {
+                return static_cast<int>(value.as_floating());
+            }
+        }
+    } catch (...) {}
+    return def;
+}
+
+double
+Config::GetDoubleOr(sled::string_view key, const double &def) const
+{
+    toml::value value;
+    try {
+        if (GetNode(key, value)) {
+            if (value.is_floating()) {
+                return value.as_floating();
+            } else if (value.is_integer()) {
+                return static_cast<double>(value.as_integer());
+            }
+        }
+    } catch (...) {}
+    return def;
+}
+
+std::string
+Config::GetStringOr(sled::string_view key, sled::string_view def) const
+{
+    toml::value value;
+    try {
+        if (GetNode(key, value) && value.is_string()) { return value.as_string(); }
+    } catch (...) {}
+    return def.to_string();
+}
+
+void
+Config::SetDefault(sled::string_view key, const bool &value)
+{
+    default_values_.insert({key.to_string(), value});
+}
+
+void
+Config::SetDefault(sled::string_view key, const char *value)
+{
+    SetDefault(key, std::string(value));
+}
+
+void
+Config::SetDefault(sled::string_view key, const std::string &value)
+{
+    default_values_.insert({key.to_string(), value});
+}
+
+void
+Config::SetDefault(sled::string_view key, sled::string_view value)
+{
+    SetDefault(key, std::string(value));
+}
+
+void
+Config::SetDefault(sled::string_view key, const int &value)
+{
+    default_values_.insert({key.to_string(), value});
+}
+
+void
+Config::SetDefault(sled::string_view key, const double &value)
+{
+    default_values_.insert({key.to_string(), value});
+}
+
+bool
+Config::GetNode(sled::string_view key, toml::value &value) const
+{
+    auto keys = StrSplit(key.to_string(), ".");
+    auto cur  = toml_;
+    for (const auto &k : keys) {
+        try {
+            auto next = toml::find(cur, k);
+            cur       = next;
+        } catch (...) {
+            if (GetDefaultNode(key, value)) { return true; }
+            return false;
+        }
+    }
+    value = cur;
+    return true;
+}
+
+bool
+Config::AddDefaultNode(sled::string_view key, ValueType value)
+{
+    auto keys = StrSplit(key.to_string(), ".");
+    if (keys.size() == 1) {
+        auto first_key = keys[0];
+        switch (value.index()) {
+        case 0:
+            toml_[first_key] = sled::get<bool>(value);
+            break;
+        case 1:
+            toml_[first_key] = sled::get<std::string>(value);
+            break;
+        case 2:
+            toml_[first_key] = sled::get<int>(value);
+            break;
+        case 3:
+            toml_[first_key] = sled::get<double>(value);
+            break;
+        default:
+            return false;
+        }
+        return true;
+    }
+    return false;
+}
+
+bool
+Config::GetDefaultNode(sled::string_view key, toml::value &value) const
+{
+    auto iter = default_values_.find(key.to_string());
+    if (iter == default_values_.end()) { return false; }
+    auto &default_value = iter->second;
+    switch (default_value.index()) {
+    case 0:
+        value = sled::get<bool>(default_value);
+        break;
+    case 1:
+        value = sled::get<std::string>(default_value);
+        break;
+    case 2:
+        value = sled::get<int>(default_value);
+        break;
+    case 3:
+        value = sled::get<double>(default_value);
+        break;
+    default:
+        return false;
+    }
+    return true;
+}
+}// namespace sled
diff --git a/src/sled/config.h b/src/sled/config.h
new file mode 100644
index 0000000..ad5c469
--- /dev/null
+++ b/src/sled/config.h
@@ -0,0 +1,49 @@
+#ifndef SLED_CONFIG_H
+#define SLED_CONFIG_H
+
+#include "sled/nonstd/string_view.h"
+#include "sled/variant.h"
+#include "toml.hpp"
+
+namespace sled {
+class Config {
+public:
+    using ValueType = sled::variant<bool, std::string, int, double>;
+    Config();
+    Config(sled::string_view name);
+    Config(sled::string_view name, sled::string_view path);
+    Config(const Config &lhs)                = delete;
+    Config(Config &&rhs) noexcept            = delete;
+    Config &operator=(const Config &lhs)     = delete;
+    Config &operator=(Config &&rhs) noexcept = delete;
+
+    void SetConfigName(sled::string_view name);
+    void AddConfigPath(sled::string_view path);
+
+    bool ReadInConfig();
+
+    bool IsSet(sled::string_view key) const;
+    bool GetBoolOr(sled::string_view key, const bool &def = false) const;
+    int GetIntOr(sled::string_view key, const int &def = 0) const;
+    double GetDoubleOr(sled::string_view key, const double &def = 0.0) const;
+    std::string GetStringOr(sled::string_view key, const sled::string_view def = "") const;
+
+    void SetDefault(sled::string_view key, const bool &value);
+    void SetDefault(sled::string_view key, const char *value);
+    void SetDefault(sled::string_view key, const std::string &value);
+    void SetDefault(sled::string_view key, sled::string_view value);
+    void SetDefault(sled::string_view key, const int &value);
+    void SetDefault(sled::string_view key, const double &value);
+
+private:
+    bool GetNode(sled::string_view key, toml::value &value) const;
+    bool AddDefaultNode(sled::string_view, ValueType value);
+    bool GetDefaultNode(sled::string_view key, toml::value &value) const;
+
+    std::unordered_map<std::string, ValueType> default_values_;
+    std::vector<std::string> config_paths_;
+    std::string config_name_;
+    toml::value toml_;
+};
+}// namespace sled
+#endif// SLED_CONFIG_H
diff --git a/src/sled/config_test.cc b/src/sled/config_test.cc
new file mode 100644
index 0000000..8500e6f
--- /dev/null
+++ b/src/sled/config_test.cc
@@ -0,0 +1,33 @@
+#include <sled/config.h>
+#include <sled/strings/utils.h>
+
+static std::string test_config_name = "config_test";
+static std::string test_config_path = sled::StripSuffix(__FILE__, "config_test.cc").to_string();
+
+TEST_SUITE("Config")
+{
+    TEST_CASE("config")
+    {
+        sled::Config config;
+        config.SetConfigName(test_config_name);
+        config.AddConfigPath(test_config_path);
+        config.SetDefault("top-string", "no effect");
+        config.SetDefault("top-kk", "kk");
+        CHECK(config.ReadInConfig());
+
+        CHECK(config.IsSet("top-string"));
+        CHECK_EQ(config.GetStringOr("top-string"), "bob");
+
+        CHECK(config.IsSet("top-kk"));
+        CHECK_EQ(config.GetStringOr("top-kk"), "kk");
+
+        CHECK(config.IsSet("top-int"));
+        CHECK(config.IsSet("top-bool"));
+        CHECK_EQ(config.GetIntOr("top-int"), 10);
+        CHECK_EQ(config.GetBoolOr("top-bool"), true);
+        CHECK_EQ(config.GetIntOr("top-bool"), 1);
+
+        CHECK(config.IsSet("top-table.key1"));
+        CHECK_EQ(config.GetStringOr("top-table.key1"), "value1");
+    }
+}
diff --git a/src/sled/config_test.toml b/src/sled/config_test.toml
new file mode 100644
index 0000000..5a0fae4
--- /dev/null
+++ b/src/sled/config_test.toml
@@ -0,0 +1,24 @@
+top-string = "bob"
+top-int = 10
+top-bool = true
+top-array = [ "item1", "item2", "item3" ]
+nested-array = [
+    [ "nested-item1-subitem1", "nested-item1-subitem2"],
+    [ "nested-item2-subitem1", "nested-item2-subitem2"]
+]
+
+[top-table]
+key1 = "value1"
+key2 = "value2"
+key3 = "value3"
+
+# Nested table
+[nested-table.key1]
+
+key1-subkey1 = "value1-1"
+key1-subkey2 = "value1-2"
+
+[nested-table.key2]
+
+key2-subkey1 = "value2-1"
+key2-subkey2 = "value2-2"
diff --git a/src/sled/sled.h b/src/sled/sled.h
index 99bd0ae..9ea95d1 100644
--- a/src/sled/sled.h
+++ b/src/sled/sled.h
@@ -10,6 +10,7 @@
 #include "sled/nonstd/string_view.h"
 #include "toml.hpp"
 
+#include "sled/config.h"
 // experimental
 #include "sled/experimental/design_patterns/dispatcher.h"
 
diff --git a/src/sled/strings/utils.cc b/src/sled/strings/utils.cc
index dd40eca..9193af1 100644
--- a/src/sled/strings/utils.cc
+++ b/src/sled/strings/utils.cc
@@ -17,7 +17,7 @@ ToUpper(char c)
 }
 
 std::string
-ToLower(const std::string &str)
+ToLower(sled::string_view str)
 {
     std::stringstream ss;
     for (auto &ch : str) { ss << ToLower(ch); }
@@ -25,7 +25,7 @@ ToLower(const std::string &str)
 }
 
 std::string
-ToUpper(const std::string &str)
+ToUpper(sled::string_view str)
 {
     std::stringstream ss;
     for (auto &ch : str) { ss << ToUpper(ch); }
@@ -102,28 +102,75 @@ TrimRight(const std::string &str, const std::string &chars)
     return end == std::string::npos ? "" : str.substr(0, end + 1);
 }
 
+// bool
+// EndsWith(const std::string &str, const std::string &suffix)
+// {
+//     return str.size() >= suffix.size() && str.compare(str.size() - suffix.size(), suffix.size(), suffix) == 0;
+// }
+//
+// bool
+// StartsWith(const std::string &str, const std::string &prefix)
+// {
+//     return str.size() >= prefix.size() && str.compare(0, prefix.size(), prefix) == 0;
+// }
 bool
-EndsWith(const std::string &str, const std::string &suffix)
-{
-    return str.size() >= suffix.size() && str.compare(str.size() - suffix.size(), suffix.size(), suffix) == 0;
-}
-
-bool
-StartsWith(const std::string &str, const std::string &prefix)
+StartsWith(sled::string_view str, sled::string_view prefix)
 {
     return str.size() >= prefix.size() && str.compare(0, prefix.size(), prefix) == 0;
 }
 
 bool
-EndsWithIgnoreCase(const std::string &str, const std::string &suffix)
+EndsWith(sled::string_view str, sled::string_view suffix)
 {
-    return EndsWith(ToLower(str), ToLower(suffix));
+    return str.size() >= suffix.size() && str.compare(str.size() - suffix.size(), suffix.size(), suffix) == 0;
+}
+
+// bool
+// EndsWithIgnoreCase(const std::string &str, const std::string &suffix)
+// {
+//     return EndsWith(ToLower(str), ToLower(suffix));
+// }
+//
+// bool
+// StartsWithIgnoreCase(const std::string &str, const std::string &prefix)
+// {
+//     return StartsWith(ToLower(str), ToLower(prefix));
+// }
+
+bool
+EndsWithIgnoreCase(sled::string_view str, sled::string_view suffix)
+{
+    if (str.size() < suffix.size()) { return false; }
+
+    auto str_iter    = str.rbegin();
+    auto suffix_iter = suffix.rbegin();
+
+    for (; suffix_iter != suffix.rend(); ++str_iter, ++suffix_iter) {
+        if (ToLower(*str_iter) != ToLower(*suffix_iter)) { return false; }
+    }
+    return true;
 }
 
 bool
-StartsWithIgnoreCase(const std::string &str, const std::string &prefix)
+StartsWithIgnoreCase(sled::string_view str, sled::string_view prefix)
 {
-    return StartsWith(ToLower(str), ToLower(prefix));
+    if (str.size() < prefix.size()) { return false; }
+    auto str_iter    = str.begin();
+    auto prefix_iter = prefix.begin();
+    for (; prefix_iter != prefix.end(); ++str_iter, ++prefix_iter) {
+        if (ToLower(*str_iter) != ToLower(*prefix_iter)) { return false; }
+    }
+    return true;
+}
+
+bool
+EqualsIgnoreCase(sled::string_view lhs, sled::string_view rhs)
+{
+    if (lhs.size() != rhs.size()) { return false; }
+    for (size_t i = 0; i < lhs.size(); ++i) {
+        if (ToLower(lhs[i]) != ToLower(rhs[i])) { return false; }
+    }
+    return true;
 }
 
 bool
diff --git a/src/sled/strings/utils.h b/src/sled/strings/utils.h
index 5383c84..9736661 100644
--- a/src/sled/strings/utils.h
+++ b/src/sled/strings/utils.h
@@ -1,6 +1,7 @@
 #pragma once
 #ifndef SLED_STRINGS_UTILS_H
 #define SLED_STRINGS_UTILS_H
+#include "sled/nonstd/string_view.h"
 #include <string>
 #include <vector>
 
@@ -8,21 +9,41 @@ namespace sled {
 
 char ToLower(char c);
 char ToUpper(char c);
-std::string ToLower(const std::string &str);
-std::string ToUpper(const std::string &str);
+// std::string ToLower(const std::string &str);
+// std::string ToUpper(const std::string &str);
+std::string ToLower(sled::string_view str);
+std::string ToUpper(sled::string_view str);
 std::string ToHex(const std::string &str);
 std::string StrJoin(const std::vector<std::string> &strings, const std::string &delim, bool skip_empty = false);
 std::vector<std::string> StrSplit(const std::string &str, const std::string &delim, bool skip_empty = false);
 std::string Trim(const std::string &str, const std::string &chars = " \t\n\r");
 std::string TrimLeft(const std::string &str, const std::string &chars = " \t\n\r");
 std::string TrimRight(const std::string &str, const std::string &chars = " \t\n\r");
-bool EndsWith(const std::string &str, const std::string &suffix);
-bool StartsWith(const std::string &str, const std::string &prefix);
+// bool StartsWith(const std::string &str, const std::string &prefix);
+// bool EndsWith(const std::string &str, const std::string &suffix);
+bool StartsWith(sled::string_view str, sled::string_view prefix);
+bool EndsWith(sled::string_view str, sled::string_view suffix);
 
-bool EndsWithIgnoreCase(const std::string &str, const std::string &suffix);
-bool StartsWithIgnoreCase(const std::string &str, const std::string &prefix);
+// bool EndsWithIgnoreCase(const std::string &str, const std::string &suffix);
+// bool StartsWithIgnoreCase(const std::string &str, const std::string &prefix);
+bool EndsWithIgnoreCase(sled::string_view str, sled::string_view suffix);
+bool StartsWithIgnoreCase(sled::string_view str, sled::string_view prefix);
 
-bool EqualsIgnoreCase(const std::string &lhs, const std::string &rhs);
+// bool EqualsIgnoreCase(const std::string &lhs, const std::string &rhs);
+bool EqualsIgnoreCase(sled::string_view lhs, sled::string_view rhs);
 
+inline sled::string_view
+StripPrefix(sled::string_view str, sled::string_view prefix)
+{
+    if (sled::StartsWith(str, prefix)) str.remove_prefix(prefix.size());
+    return str;
+}
+
+inline sled::string_view
+StripSuffix(sled::string_view str, sled::string_view suffix)
+{
+    if (sled::EndsWith(str, suffix)) str.remove_suffix(suffix.size());
+    return str;
+}
 }// namespace sled
 #endif//   SLED_STRINGS_UTILS_H
diff --git a/src/sled/uri.cc b/src/sled/uri.cc
index 1b2876f..30ba8b0 100644
--- a/src/sled/uri.cc
+++ b/src/sled/uri.cc
@@ -33,7 +33,7 @@ URI::ParseURI(const std::string &uri_str)
     if (!std::regex_match(uri_str, match, uri_regex)) {
         return sled::MakeStatusOr<URI>(sled::StatusCode::kInvalidArgument, "Invalid URI format");
     }
-    uri.set_scheme(sled::ToLower(match[2]));
+    uri.set_scheme(sled::ToLower(match[2].str()));
 
     int counter = 0;
     // for (auto res : match) { LOGD("match", "{}:{}", counter++, res); }