Release v0.18.6

Modify for OpenVMS x86 C++. Make tests on OpenVMS currently not supported due to no cmake support.
Changes tested on OpenVMS clang C++ and Fedora & GCC

.github/workflows/test.yaml

@@ -11,7 +11,7 @@ jobs:
       - name: install libraries
         run: sudo apt-get update && sudo apt-get install -y libbrotli-dev libcurl4-openssl-dev
       - name: build and run tests
-        run: cd test && make -j4
+        run: cd test && make
       - name: run fuzz test target
         run: cd test && make fuzz_test
 
@@ -21,23 +21,45 @@ jobs:
       - name: checkout
         uses: actions/checkout@v4
       - name: build and run tests
-        run: |
-          cd test && make -j2
+        run: cd test && make
+      - name: run fuzz test target
+        run: cd test && make fuzz_test
 
   windows:
     runs-on: windows-latest
     steps:
-    - name: prepare git for checkout on windows
+    - name: Prepare Git for Checkout on Windows
       run: |
         git config --global core.autocrlf false
         git config --global core.eol lf
-    - name: checkout
+    - name: Checkout
       uses: actions/checkout@v4
-    - name: setup msbuild on windows
+    - name: Export GitHub Actions cache environment variables
+      uses: actions/github-script@v7
+      with:
+        script: |
+          core.exportVariable('ACTIONS_CACHE_URL', process.env.ACTIONS_CACHE_URL || '');
+          core.exportVariable('ACTIONS_RUNTIME_TOKEN', process.env.ACTIONS_RUNTIME_TOKEN || '');
+    - name: Setup msbuild on windows
       uses: microsoft/setup-msbuild@v2
-    - name: make-windows
+    - name: Install libraries
       run: |
-        cd test
-        msbuild.exe test.sln /verbosity:minimal /t:Build "/p:Configuration=Release;Platform=x64"
-        x64\Release\test.exe
+        vcpkg install gtest curl zlib brotli
+        choco install openssl
 
+    - name: Configure CMake with SSL
+      run: cmake -B build -S . -DCMAKE_BUILD_TYPE=Release -DCMAKE_TOOLCHAIN_FILE=${{ env.VCPKG_ROOT }}/scripts/buildsystems/vcpkg.cmake -DHTTPLIB_TEST=ON -DHTTPLIB_REQUIRE_OPENSSL=ON -DHTTPLIB_REQUIRE_ZLIB=ON -DHTTPLIB_REQUIRE_BROTLI=ON
+    - name: Build with with SSL
+      run: cmake --build build --config Release
+    - name: Run tests with SSL
+      run: ctest --output-on-failure --test-dir build -C Release
+
+    - name: Configure CMake without SSL
+      run: cmake -B build-no-ssl -S . -DCMAKE_BUILD_TYPE=Release -DCMAKE_TOOLCHAIN_FILE=${{ env.VCPKG_ROOT }}/scripts/buildsystems/vcpkg.cmake -DHTTPLIB_TEST=ON -DHTTPLIB_REQUIRE_OPENSSL=ON -DHTTPLIB_REQUIRE_ZLIB=ON -DHTTPLIB_REQUIRE_BROTLI=ON
+    - name: Build without SSL
+      run: cmake --build build-no-ssl --config Release
+    - name: Run tests without SSL
+      run: ctest --output-on-failure --test-dir build-no-ssl -C Release
+    env:
+      VCPKG_ROOT: "C:/vcpkg"
+      VCPKG_BINARY_SOURCES: "clear;x-gha,readwrite"

README.md

@@ -39,10 +39,10 @@ svr.listen("0.0.0.0", 8080);
 #include "path/to/httplib.h"
 
 // HTTP
-httplib::Client cli("http://cpp-httplib-server.yhirose.repl.co");
+httplib::Client cli("http://yhirose.github.io");
 
 // HTTPS
-httplib::Client cli("https://cpp-httplib-server.yhirose.repl.co");
+httplib::Client cli("https://yhirose.github.io");
 
 auto res = cli.Get("/hi");
 res->status;
@@ -79,7 +79,7 @@ cli.set_ca_cert_path("./ca-bundle.crt");
 cli.enable_server_certificate_verification(false);
 
 // Disable host verification
-cli.enable_server_host_verification(false);
+cli.enable_server_hostname_verification(false);
 ```
 
 > [!NOTE]
@@ -125,6 +125,21 @@ int main(void)
     res.set_content(req.body, "text/plain");
   });
 
+  // If the handler takes time to finish, you can also poll the connection state
+  svr.Get("/task", [&](const Request& req, Response& res) {
+    const char * result = nullptr;
+    process.run(); // for example, starting an external process
+    while (result == nullptr) {
+      sleep(1);
+      if (req.is_connection_closed()) {
+        process.kill(); // kill the process
+        return;
+      }
+      result = process.stdout(); // != nullptr if the process finishes
+    }
+    res.set_content(result, "text/plain");
+  });
+
   svr.Get("/stop", [&](const Request& req, Response& res) {
     svr.stop();
   });
@@ -557,18 +572,18 @@ enum Error {
 
 ```c++
 httplib::Headers headers = {
-  { "Accept-Encoding", "gzip, deflate" }
+  { "Hello", "World!" }
 };
 auto res = cli.Get("/hi", headers);
 ```
 or
 ```c++
-auto res = cli.Get("/hi", {{"Accept-Encoding", "gzip, deflate"}});
+auto res = cli.Get("/hi", {{"Hello", "World!"}});
 ```
 or
 ```c++
 cli.set_default_headers({
-  { "Accept-Encoding", "gzip, deflate" }
+  { "Hello", "World!" }
 });
 auto res = cli.Get("/hi");
 ```
@@ -823,6 +838,21 @@ The server can apply compression to the following MIME type contents:
 Brotli compression is available with `CPPHTTPLIB_BROTLI_SUPPORT`. Necessary libraries should be linked.
 Please see https://github.com/google/brotli for more detail.
 
+### Default `Accept-Encoding` value
+
+The default `Acdcept-Encoding` value contains all possible compression types. So, the following two examples are same.
+
+```c++
+res = cli.Get("/resource/foo");
+res = cli.Get("/resource/foo", {{"Accept-Encoding", "gzip, deflate, br"}});
+```
+
+If we don't want a response without compression, we have to set `Accept-Encoding` to an empty string. This behavior is similar to curl.
+
+```c++
+res = cli.Get("/resource/foo", {{"Accept-Encoding", ""}});
+```
+
 ### Compress request body on client
 
 ```c++
@@ -834,8 +864,9 @@ res = cli.Post("/resource/foo", "...", "text/plain");
 
 ```c++
 cli.set_decompress(false);
-res = cli.Get("/resource/foo", {{"Accept-Encoding", "gzip, deflate, br"}});
+res = cli.Get("/resource/foo");
 res->body; // Compressed data
+
 ```
 
 Use `poll` instead of `select`
@@ -900,9 +931,6 @@ From Docker Hub
 
 ```bash
 > docker run --rm -it -p 8080:80 -v ./docker/html:/html yhirose4dockerhub/cpp-httplib-server
-...
-
-> docker run --init --rm -it -p 8080:80 -v ./docker/html:/html cpp-httplib-server
 Serving HTTP on 0.0.0.0 port 80 ...
 192.168.65.1 - - [31/Aug/2024:21:33:56 +0000] "GET / HTTP/1.1" 200 599 "-" "curl/8.7.1"
 192.168.65.1 - - [31/Aug/2024:21:34:26 +0000] "GET / HTTP/1.1" 200 599 "-" "Mozilla/5.0 ..."
@@ -940,7 +968,7 @@ Include `httplib.h` before `Windows.h` or include `Windows.h` by defining `WIN32
 License
 -------
 
-MIT license (© 2024 Yuji Hirose)
+MIT license (© 2025 Yuji Hirose)
 
 Special Thanks To
 -----------------

benchmark/cpp-httplib-base/httplib.h

@@ -1,7 +1,7 @@
 //
 //  httplib.h
 //
-//  Copyright (c) 2024 Yuji Hirose. All rights reserved.
+//  Copyright (c) 2025 Yuji Hirose. All rights reserved.
 //  MIT License
 //
 

docker/main.cc

@@ -1,7 +1,7 @@
 //
 //  main.cc
 //
-//  Copyright (c) 2024 Yuji Hirose. All rights reserved.
+//  Copyright (c) 2025 Yuji Hirose. All rights reserved.
 //  MIT License
 //
 

example/Makefile

@@ -18,7 +18,7 @@ ZLIB_SUPPORT = -DCPPHTTPLIB_ZLIB_SUPPORT -lz
 BROTLI_DIR = $(PREFIX)/opt/brotli
 BROTLI_SUPPORT = -DCPPHTTPLIB_BROTLI_SUPPORT -I$(BROTLI_DIR)/include -L$(BROTLI_DIR)/lib -lbrotlicommon -lbrotlienc -lbrotlidec
 
-all: server client hello simplecli simplesvr upload redirect ssesvr ssecli benchmark issue
+all: server client hello simplecli simplesvr upload redirect ssesvr ssecli benchmark one_time_request server_and_client
 
 server : server.cc ../httplib.h Makefile
 	$(CXX) -o server $(CXXFLAGS) server.cc $(OPENSSL_SUPPORT) $(ZLIB_SUPPORT) $(BROTLI_SUPPORT)

example/client.vcxproj

@@ -22,34 +22,34 @@
     <ProjectGuid>{6DB1FC63-B153-4279-92B7-D8A11AF285D6}</ProjectGuid>
     <Keyword>Win32Proj</Keyword>
     <RootNamespace>client</RootNamespace>
-    <WindowsTargetPlatformVersion>10.0.15063.0</WindowsTargetPlatformVersion>
+    <WindowsTargetPlatformVersion>10.0</WindowsTargetPlatformVersion>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
     <CharacterSet>Unicode</CharacterSet>
-    <PlatformToolset>v141</PlatformToolset>
+    <PlatformToolset>v143</PlatformToolset>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
     <CharacterSet>Unicode</CharacterSet>
-    <PlatformToolset>v141</PlatformToolset>
+    <PlatformToolset>v143</PlatformToolset>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
-    <PlatformToolset>v141</PlatformToolset>
+    <PlatformToolset>v143</PlatformToolset>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
-    <PlatformToolset>v141</PlatformToolset>
+    <PlatformToolset>v143</PlatformToolset>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">

example/server.vcxproj

@@ -18,38 +18,41 @@
       <Platform>x64</Platform>
     </ProjectConfiguration>
   </ItemGroup>
+  <ItemGroup>
+    <ClCompile Include="simplesvr.cc" />
+  </ItemGroup>
   <PropertyGroup Label="Globals">
     <ProjectGuid>{864CD288-050A-4C8B-9BEF-3048BD876C5B}</ProjectGuid>
     <Keyword>Win32Proj</Keyword>
     <RootNamespace>sample</RootNamespace>
-    <WindowsTargetPlatformVersion>10.0.15063.0</WindowsTargetPlatformVersion>
+    <WindowsTargetPlatformVersion>10.0</WindowsTargetPlatformVersion>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
     <CharacterSet>Unicode</CharacterSet>
-    <PlatformToolset>v141</PlatformToolset>
+    <PlatformToolset>v143</PlatformToolset>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
     <CharacterSet>Unicode</CharacterSet>
-    <PlatformToolset>v141</PlatformToolset>
+    <PlatformToolset>v143</PlatformToolset>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
-    <PlatformToolset>v141</PlatformToolset>
+    <PlatformToolset>v143</PlatformToolset>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
-    <PlatformToolset>v141</PlatformToolset>
+    <PlatformToolset>v143</PlatformToolset>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
@@ -151,9 +154,6 @@
       <AdditionalDependencies>Ws2_32.lib;%(AdditionalDependencies)</AdditionalDependencies>
     </Link>
   </ItemDefinitionGroup>
-  <ItemGroup>
-    <ClCompile Include="server.cc" />
-  </ItemGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
   <ImportGroup Label="ExtensionTargets">
   </ImportGroup>

example/server_and_client.cc

@@ -1,7 +1,7 @@
 //
 //  server_and_client.cc
 //
-//  Copyright (c) 2024 Yuji Hirose. All rights reserved.
+//  Copyright (c) 2025 Yuji Hirose. All rights reserved.
 //  MIT License
 //
 

httplib.h

@@ -1,14 +1,14 @@
 //
 //  httplib.h
 //
-//  Copyright (c) 2024 Yuji Hirose. All rights reserved.
+//  Copyright (c) 2025 Yuji Hirose. All rights reserved.
 //  MIT License
 //
 
 #ifndef CPPHTTPLIB_HTTPLIB_H
 #define CPPHTTPLIB_HTTPLIB_H
 
-#define CPPHTTPLIB_VERSION "0.18.1"
+#define CPPHTTPLIB_VERSION "0.18.6"
 
 /*
  * Configuration
@@ -218,7 +218,9 @@ using socket_t = SOCKET;
 #include <csignal>
 #include <pthread.h>
 #include <sys/mman.h>
+#ifndef __VMS
 #include <sys/select.h>
+#endif
 #include <sys/socket.h>
 #include <sys/un.h>
 #include <unistd.h>
@@ -612,6 +614,7 @@ using Ranges = std::vector<Range>;
 struct Request {
   std::string method;
   std::string path;
+  Params params;
   Headers headers;
   std::string body;
 
@@ -623,11 +626,11 @@ struct Request {
   // for server
   std::string version;
   std::string target;
-  Params params;
   MultipartFormDataMap files;
   Ranges ranges;
   Match matches;
   std::unordered_map<std::string, std::string> path_params;
+  std::function<bool()> is_connection_closed = []() { return true; };
 
   // for client
   ResponseHandler response_handler;
@@ -1582,6 +1585,9 @@ private:
   bool send_(Request &req, Response &res, Error &error);
   Result send_(Request &&req);
 
+#ifdef CPPHTTPLIB_OPENSSL_SUPPORT
+  bool is_ssl_peer_could_be_closed(SSL *ssl) const;
+#endif
   socket_t create_client_socket(Error &error) const;
   bool read_response_line(Stream &strm, const Request &req,
                           Response &res) const;
@@ -2009,18 +2015,34 @@ inline void duration_to_sec_and_usec(const T &duration, U callback) {
   callback(static_cast<time_t>(sec), static_cast<time_t>(usec));
 }
 
+inline bool is_numeric(const std::string &str) {
+  return !str.empty() && std::all_of(str.begin(), str.end(), ::isdigit);
+}
+
 inline uint64_t get_header_value_u64(const Headers &headers,
                                      const std::string &key, uint64_t def,
-                                     size_t id) {
+                                     size_t id, bool &is_invalid_value) {
+  is_invalid_value = false;
   auto rng = headers.equal_range(key);
   auto it = rng.first;
   std::advance(it, static_cast<ssize_t>(id));
   if (it != rng.second) {
-    return std::strtoull(it->second.data(), nullptr, 10);
+    if (is_numeric(it->second)) {
+      return std::strtoull(it->second.data(), nullptr, 10);
+    } else {
+      is_invalid_value = true;
+    }
   }
   return def;
 }
 
+inline uint64_t get_header_value_u64(const Headers &headers,
+                                     const std::string &key, uint64_t def,
+                                     size_t id) {
+  bool dummy = false;
+  return get_header_value_u64(headers, key, def, id, dummy);
+}
+
 } // namespace detail
 
 inline uint64_t Request::get_header_value_u64(const std::string &key,
@@ -2038,8 +2060,6 @@ inline void default_socket_options(socket_t sock) {
 #ifdef _WIN32
   setsockopt(sock, SOL_SOCKET, SO_REUSEADDR,
              reinterpret_cast<const char *>(&opt), sizeof(opt));
-  setsockopt(sock, SOL_SOCKET, SO_EXCLUSIVEADDRUSE,
-             reinterpret_cast<const char *>(&opt), sizeof(opt));
 #else
 #ifdef SO_REUSEPORT
   setsockopt(sock, SOL_SOCKET, SO_REUSEPORT,
@@ -2258,13 +2278,33 @@ make_basic_authentication_header(const std::string &username,
 
 namespace detail {
 
+#if defined(_WIN32)
+inline std::wstring u8string_to_wstring(const char *s) {
+  std::wstring ws;
+  auto len = static_cast<int>(strlen(s));
+  auto wlen = ::MultiByteToWideChar(CP_UTF8, 0, s, len, nullptr, 0);
+  if (wlen > 0) {
+    ws.resize(wlen);
+    wlen = ::MultiByteToWideChar(
+        CP_UTF8, 0, s, len,
+        const_cast<LPWSTR>(reinterpret_cast<LPCWSTR>(ws.data())), wlen);
+    if (wlen != static_cast<int>(ws.size())) { ws.clear(); }
+  }
+  return ws;
+}
+#endif
+
 struct FileStat {
   FileStat(const std::string &path);
   bool is_file() const;
   bool is_dir() const;
 
 private:
+#if defined(_WIN32)
+  struct _stat st_;
+#else
   struct stat st_;
+#endif
   int ret_ = -1;
 };
 
@@ -2483,6 +2523,60 @@ private:
   bool is_open_empty_file = false;
 };
 
+// NOTE: https://www.rfc-editor.org/rfc/rfc9110#section-5
+namespace fields {
+
+inline bool is_token_char(char c) {
+  return std::isalnum(c) || c == '!' || c == '#' || c == '$' || c == '%' ||
+         c == '&' || c == '\'' || c == '*' || c == '+' || c == '-' ||
+         c == '.' || c == '^' || c == '_' || c == '`' || c == '|' || c == '~';
+}
+
+inline bool is_token(const std::string &s) {
+  if (s.empty()) { return false; }
+  for (auto c : s) {
+    if (!is_token_char(c)) { return false; }
+  }
+  return true;
+}
+
+inline bool is_field_name(const std::string &s) { return is_token(s); }
+
+inline bool is_vchar(char c) { return c >= 33 && c <= 126; }
+
+inline bool is_obs_text(char c) { return 128 <= static_cast<unsigned char>(c); }
+
+inline bool is_field_vchar(char c) { return is_vchar(c) || is_obs_text(c); }
+
+inline bool is_field_content(const std::string &s) {
+  if (s.empty()) { return true; }
+
+  if (s.size() == 1) {
+    return is_field_vchar(s[0]);
+  } else if (s.size() == 2) {
+    return is_field_vchar(s[0]) && is_field_vchar(s[1]);
+  } else {
+    size_t i = 0;
+
+    if (!is_field_vchar(s[i])) { return false; }
+    i++;
+
+    while (i < s.size() - 1) {
+      auto c = s[i++];
+      if (c == ' ' || c == '\t' || is_field_vchar(c)) {
+      } else {
+        return false;
+      }
+    }
+
+    return is_field_vchar(s[i]);
+  }
+}
+
+inline bool is_field_value(const std::string &s) { return is_field_content(s); }
+
+} // namespace fields
+
 } // namespace detail
 
 // ----------------------------------------------------------------------------
@@ -2639,7 +2733,12 @@ inline bool is_valid_path(const std::string &path) {
 }
 
 inline FileStat::FileStat(const std::string &path) {
+#if defined(_WIN32)
+  auto wpath = u8string_to_wstring(path.c_str());
+  ret_ = _wstat(wpath.c_str(), &st_);
+#else
   ret_ = stat(path.c_str(), &st_);
+#endif
 }
 inline bool FileStat::is_file() const {
   return ret_ >= 0 && S_ISREG(st_.st_mode);
@@ -2909,10 +3008,8 @@ inline bool mmap::open(const char *path) {
   close();
 
 #if defined(_WIN32)
-  std::wstring wpath;
-  for (size_t i = 0; i < strlen(path); i++) {
-    wpath += path[i];
-  }
+  auto wpath = u8string_to_wstring(path);
+  if (wpath.empty()) { return false; }
 
 #if _WIN32_WINNT >= _WIN32_WINNT_WIN8
   hFile_ = ::CreateFile2(wpath.c_str(), GENERIC_READ, FILE_SHARE_READ,
@@ -3282,8 +3379,6 @@ inline bool keep_alive(const std::atomic<socket_t> &svr_sock, socket_t sock,
     } else {
       return true; // Ready for read
     }
-
-    std::this_thread::sleep_for(microseconds{interval_usec});
   }
 
   return false;
@@ -4119,22 +4214,21 @@ inline bool parse_header(const char *beg, const char *end, T fn) {
     if (!key_len) { return false; }
 
     auto key = std::string(beg, key_end);
-    auto val = case_ignore::equal(key, "Location")
-                   ? std::string(p, end)
-                   : decode_url(std::string(p, end), false);
+    // auto val = (case_ignore::equal(key, "Location") ||
+    //             case_ignore::equal(key, "Referer"))
+    //                ? std::string(p, end)
+    //                : decode_url(std::string(p, end), false);
+    auto val = std::string(p, end);
 
-    // NOTE: From RFC 9110:
-    // Field values containing CR, LF, or NUL characters are
-    // invalid and dangerous, due to the varying ways that
-    // implementations might parse and interpret those
-    // characters; a recipient of CR, LF, or NUL within a field
-    // value MUST either reject the message or replace each of
-    // those characters with SP before further processing or
-    // forwarding of that message.
-    static const std::string CR_LF_NUL("\r\n\0", 3);
-    if (val.find_first_of(CR_LF_NUL) != std::string::npos) { return false; }
+    if (!detail::fields::is_field_value(val)) { return false; }
+
+    if (case_ignore::equal(key, "Location") ||
+        case_ignore::equal(key, "Referer")) {
+      fn(key, val);
+    } else {
+      fn(key, decode_url(val, false));
+    }
 
-    fn(key, val);
     return true;
   }
 
@@ -4170,7 +4264,7 @@ inline bool read_headers(Stream &strm, Headers &headers) {
     auto end = line_reader.ptr() + line_reader.size() - line_terminator_len;
 
     if (!parse_header(line_reader.ptr(), end,
-                      [&](const std::string &key, std::string &val) {
+                      [&](const std::string &key, const std::string &val) {
                         headers.emplace(key, val);
                       })) {
       return false;
@@ -4362,8 +4456,14 @@ bool read_content(Stream &strm, T &x, size_t payload_max_length, int &status,
         } else if (!has_header(x.headers, "Content-Length")) {
           ret = read_content_without_length(strm, out);
         } else {
-          auto len = get_header_value_u64(x.headers, "Content-Length", 0, 0);
-          if (len > payload_max_length) {
+          auto is_invalid_value = false;
+          auto len = get_header_value_u64(
+              x.headers, "Content-Length",
+              (std::numeric_limits<uint64_t>::max)(), 0, is_invalid_value);
+
+          if (is_invalid_value) {
+            ret = false;
+          } else if (len > payload_max_length) {
             exceed_payload_max_length = true;
             skip_content_with_length(strm, len);
             ret = false;
@@ -5132,7 +5232,18 @@ inline bool range_error(Request &req, Response &res) {
         last_pos = contant_len - 1;
       }
 
-      if (last_pos == -1) { last_pos = contant_len - 1; }
+      // NOTE: RFC-9110 '14.1.2. Byte Ranges':
+      // A client can limit the number of bytes requested without knowing the
+      // size of the selected representation. If the last-pos value is absent,
+      // or if the value is greater than or equal to the current length of the
+      // representation data, the byte range is interpreted as the remainder of
+      // the representation (i.e., the server replaces the value of last-pos
+      // with a value that is one less than the current length of the selected
+      // representation).
+      // https://www.rfc-editor.org/rfc/rfc9110.html#section-14.1.2-6
+      if (last_pos == -1 || last_pos >= contant_len) {
+        last_pos = contant_len - 1;
+      }
 
       // Range must be within content length
       if (!(0 <= first_pos && first_pos <= last_pos &&
@@ -5664,7 +5775,8 @@ inline size_t Request::get_header_value_count(const std::string &key) const {
 
 inline void Request::set_header(const std::string &key,
                                 const std::string &val) {
-  if (!detail::has_crlf(key) && !detail::has_crlf(val)) {
+  if (detail::fields::is_field_name(key) &&
+      detail::fields::is_field_value(val)) {
     headers.emplace(key, val);
   }
 }
@@ -5730,13 +5842,14 @@ inline size_t Response::get_header_value_count(const std::string &key) const {
 
 inline void Response::set_header(const std::string &key,
                                  const std::string &val) {
-  if (!detail::has_crlf(key) && !detail::has_crlf(val)) {
+  if (detail::fields::is_field_name(key) &&
+      detail::fields::is_field_value(val)) {
     headers.emplace(key, val);
   }
 }
 
 inline void Response::set_redirect(const std::string &url, int stat) {
-  if (!detail::has_crlf(url)) {
+  if (detail::fields::is_field_value(url)) {
     set_header("Location", url);
     if (300 <= stat && stat < 400) {
       this->status = stat;
@@ -7106,6 +7219,11 @@ Server::process_request(Stream &strm, const std::string &remote_addr,
     }
   }
 
+  // Setup `is_connection_closed` method
+  req.is_connection_closed = [&]() {
+    return !detail::is_socket_alive(strm.socket());
+  };
+
   // Routing
   auto routed = false;
 #ifdef CPPHTTPLIB_NO_EXCEPTIONS
@@ -7148,14 +7266,6 @@ Server::process_request(Stream &strm, const std::string &remote_addr,
                                       : StatusCode::PartialContent_206;
     }
 
-    if (detail::range_error(req, res)) {
-      res.body.clear();
-      res.content_length_ = 0;
-      res.content_provider_ = nullptr;
-      res.status = StatusCode::RangeNotSatisfiable_416;
-      return write_response(strm, close_connection, req, res);
-    }
-
     // Serve file content by using a content provider
     if (!res.file_content_path_.empty()) {
       const auto &path = res.file_content_path_;
@@ -7182,6 +7292,14 @@ Server::process_request(Stream &strm, const std::string &remote_addr,
           });
     }
 
+    if (detail::range_error(req, res)) {
+      res.body.clear();
+      res.content_length_ = 0;
+      res.content_provider_ = nullptr;
+      res.status = StatusCode::RangeNotSatisfiable_416;
+      return write_response(strm, close_connection, req, res);
+    }
+
     return write_response_with_content(strm, close_connection, req, res);
   } else {
     if (res.status == -1) { res.status = StatusCode::NotFound_404; }
@@ -7392,6 +7510,18 @@ inline bool ClientImpl::send(Request &req, Response &res, Error &error) {
   return ret;
 }
 
+#ifdef CPPHTTPLIB_OPENSSL_SUPPORT
+inline bool ClientImpl::is_ssl_peer_could_be_closed(SSL *ssl) const {
+  detail::set_nonblocking(socket_.sock, true);
+  auto se = detail::scope_exit(
+      [&]() { detail::set_nonblocking(socket_.sock, false); });
+
+  char buf[1];
+  return !SSL_peek(ssl, buf, 1) &&
+         SSL_get_error(ssl, 0) == SSL_ERROR_ZERO_RETURN;
+}
+#endif
+
 inline bool ClientImpl::send_(Request &req, Response &res, Error &error) {
   {
     std::lock_guard<std::mutex> guard(socket_mutex_);
@@ -7403,6 +7533,13 @@ inline bool ClientImpl::send_(Request &req, Response &res, Error &error) {
     auto is_alive = false;
     if (socket_.is_open()) {
       is_alive = detail::is_socket_alive(socket_.sock);
+
+#ifdef CPPHTTPLIB_OPENSSL_SUPPORT
+      if (is_alive && is_ssl()) {
+        if (is_ssl_peer_could_be_closed(socket_.ssl)) { is_alive = false; }
+      }
+#endif
+
       if (!is_alive) {
         // Attempt to avoid sigpipe by shutting down nongracefully if it seems
         // like the other side has already closed the connection Also, there
@@ -7679,12 +7816,26 @@ inline bool ClientImpl::write_request(Stream &strm, Request &req,
 
   if (!req.has_header("Accept")) { req.set_header("Accept", "*/*"); }
 
-#ifndef CPPHTTPLIB_NO_DEFAULT_USER_AGENT
-  if (!req.has_header("User-Agent")) {
-    auto agent = std::string("cpp-httplib/") + CPPHTTPLIB_VERSION;
-    req.set_header("User-Agent", agent);
-  }
+  if (!req.content_receiver) {
+    if (!req.has_header("Accept-Encoding")) {
+      std::string accept_encoding;
+#ifdef CPPHTTPLIB_BROTLI_SUPPORT
+      accept_encoding = "br";
 #endif
+#ifdef CPPHTTPLIB_ZLIB_SUPPORT
+      if (!accept_encoding.empty()) { accept_encoding += ", "; }
+      accept_encoding += "gzip, deflate";
+#endif
+      req.set_header("Accept-Encoding", accept_encoding);
+    }
+
+#ifndef CPPHTTPLIB_NO_DEFAULT_USER_AGENT
+    if (!req.has_header("User-Agent")) {
+      auto agent = std::string("cpp-httplib/") + CPPHTTPLIB_VERSION;
+      req.set_header("User-Agent", agent);
+    }
+#endif
+  };
 
   if (req.body.empty()) {
     if (req.content_provider_) {
@@ -7744,7 +7895,13 @@ inline bool ClientImpl::write_request(Stream &strm, Request &req,
   {
     detail::BufferStream bstrm;
 
-    const auto &path = url_encode_ ? detail::encode_url(req.path) : req.path;
+    const auto &path_with_query =
+        req.params.empty() ? req.path
+                           : append_query_params(req.path, req.params);
+
+    const auto &path =
+        url_encode_ ? detail::encode_url(path_with_query) : path_with_query;
+
     detail::write_request_line(bstrm, req.method, path);
 
     header_writer_(bstrm, req.headers);
@@ -7885,9 +8042,7 @@ inline bool ClientImpl::process_request(Stream &strm, Request &req,
   if (is_ssl()) {
     auto is_proxy_enabled = !proxy_host_.empty() && proxy_port_ != -1;
     if (!is_proxy_enabled) {
-      char buf[1];
-      if (SSL_peek(socket_.ssl, buf, 1) == 0 &&
-          SSL_get_error(socket_.ssl, 0) == SSL_ERROR_ZERO_RETURN) {
+      if (is_ssl_peer_could_be_closed(socket_.ssl)) {
         error = Error::SSLPeerCouldBeClosed_;
         return false;
       }
@@ -7905,7 +8060,9 @@ inline bool ClientImpl::process_request(Stream &strm, Request &req,
   // Body
   if ((res.status != StatusCode::NoContent_204) && req.method != "HEAD" &&
       req.method != "CONNECT") {
-    auto redirect = 300 < res.status && res.status < 400 && follow_location_;
+    auto redirect = 300 < res.status && res.status < 400 &&
+                    res.status != StatusCode::NotModified_304 &&
+                    follow_location_;
 
     if (req.response_handler && !redirect) {
       if (!req.response_handler(res)) {
@@ -7926,9 +8083,7 @@ inline bool ClientImpl::process_request(Stream &strm, Request &req,
             : static_cast<ContentReceiverWithProgress>(
                   [&](const char *buf, size_t n, uint64_t /*off*/,
                       uint64_t /*len*/) {
-                    if (res.body.size() + n > res.body.max_size()) {
-                      return false;
-                    }
+                    assert(res.body.size() + n <= res.body.max_size());
                     res.body.append(buf, n);
                     return true;
                   });
@@ -7942,18 +8097,23 @@ inline bool ClientImpl::process_request(Stream &strm, Request &req,
 
     if (res.has_header("Content-Length")) {
       if (!req.content_receiver) {
-        auto len = std::min<size_t>(res.get_header_value_u64("Content-Length"),
-                                    res.body.max_size());
-        if (len > 0) { res.body.reserve(len); }
+        auto len = res.get_header_value_u64("Content-Length");
+        if (len > res.body.max_size()) {
+          error = Error::Read;
+          return false;
+        }
+        res.body.reserve(static_cast<size_t>(len));
       }
     }
 
-    int dummy_status;
-    if (!detail::read_content(strm, res, (std::numeric_limits<size_t>::max)(),
-                              dummy_status, std::move(progress), std::move(out),
-                              decompress_)) {
-      if (error != Error::Canceled) { error = Error::Read; }
-      return false;
+    if (res.status != StatusCode::NotModified_304) {
+      int dummy_status;
+      if (!detail::read_content(strm, res, (std::numeric_limits<size_t>::max)(),
+                                dummy_status, std::move(progress),
+                                std::move(out), decompress_)) {
+        if (error != Error::Canceled) { error = Error::Read; }
+        return false;
+      }
     }
   }
 
@@ -8842,6 +9002,7 @@ inline void ssl_delete(std::mutex &ctx_mutex, SSL *ssl, socket_t sock,
   // best-efforts.
   if (shutdown_gracefully) {
 #ifdef _WIN32
+    (void)(sock);
     SSL_shutdown(ssl);
 #else
     timeval tv;

test/test.cc

@@ -1,3 +1,4 @@
+// NOTE: This file should be saved as UTF-8 w/ BOM
 #include <httplib.h>
 #include <signal.h>
 
@@ -241,7 +242,7 @@ TEST(DecodeURLTest, PercentCharacter) {
       detail::decode_url(
           R"(descrip=Gastos%20%C3%A1%C3%A9%C3%AD%C3%B3%C3%BA%C3%B1%C3%91%206)",
           false),
-      R"(descrip=Gastos áéíóúñÑ 6)");
+      u8"descrip=Gastos áéíóúñÑ 6");
 }
 
 TEST(DecodeURLTest, PercentCharacterNUL) {
@@ -267,9 +268,9 @@ TEST(EncodeQueryParamTest, ParseReservedCharactersTest) {
 }
 
 TEST(EncodeQueryParamTest, TestUTF8Characters) {
-  string chineseCharacters = "中国語";
-  string russianCharacters = "дом";
-  string brazilianCharacters = "óculos";
+  string chineseCharacters = u8"中国語";
+  string russianCharacters = u8"дом";
+  string brazilianCharacters = u8"óculos";
 
   EXPECT_EQ(detail::encode_query_param(chineseCharacters),
             "%E4%B8%AD%E5%9B%BD%E8%AA%9E");
@@ -510,6 +511,15 @@ TEST(GetHeaderValueTest, RegularValueInt) {
   EXPECT_EQ(100ull, val);
 }
 
+TEST(GetHeaderValueTest, RegularInvalidValueInt) {
+  Headers headers = {{"Content-Length", "x"}};
+  auto is_invalid_value = false;
+  auto val = detail::get_header_value_u64(headers, "Content-Length", 0, 0,
+                                          is_invalid_value);
+  EXPECT_EQ(0ull, val);
+  EXPECT_TRUE(is_invalid_value);
+}
+
 TEST(GetHeaderValueTest, Range) {
   {
     Headers headers = {make_range_header({{1, -1}})};
@@ -1853,6 +1863,32 @@ TEST(PathUrlEncodeTest, PathUrlEncode) {
   }
 }
 
+TEST(PathUrlEncodeTest, IncludePercentEncodingLF) {
+  Server svr;
+
+  svr.Get("/", [](const Request &req, Response &) {
+    EXPECT_EQ("\x0A", req.get_param_value("something"));
+  });
+
+  auto thread = std::thread([&]() { svr.listen(HOST, PORT); });
+  auto se = detail::scope_exit([&] {
+    svr.stop();
+    thread.join();
+    ASSERT_FALSE(svr.is_running());
+  });
+
+  svr.wait_until_ready();
+
+  {
+    Client cli(HOST, PORT);
+    cli.set_url_encode(false);
+
+    auto res = cli.Get("/?something=%0A");
+    ASSERT_TRUE(res);
+    EXPECT_EQ(StatusCode::OK_200, res->status);
+  }
+}
+
 TEST(BindServerTest, DISABLED_BindDualStack) {
   Server svr;
 
@@ -2003,7 +2039,7 @@ TEST(ErrorHandlerTest, ContentLength) {
   {
     Client cli(HOST, PORT);
 
-    auto res = cli.Get("/hi");
+    auto res = cli.Get("/hi", {{"Accept-Encoding", ""}});
     ASSERT_TRUE(res);
     EXPECT_EQ(StatusCode::OK_200, res->status);
     EXPECT_EQ("text/html", res->get_header_value("Content-Type"));
@@ -2013,7 +2049,46 @@ TEST(ErrorHandlerTest, ContentLength) {
 }
 
 #ifndef CPPHTTPLIB_NO_EXCEPTIONS
-TEST(ExceptionHandlerTest, ContentLength) {
+TEST(ExceptionTest, WithoutExceptionHandler) {
+  Server svr;
+
+  svr.Get("/exception", [&](const Request & /*req*/, Response & /*res*/) {
+    throw std::runtime_error("exception...");
+  });
+
+  svr.Get("/unknown", [&](const Request & /*req*/, Response & /*res*/) {
+    throw std::runtime_error("exception\r\n...");
+  });
+
+  auto listen_thread = std::thread([&svr]() { svr.listen("localhost", PORT); });
+  auto se = detail::scope_exit([&] {
+    svr.stop();
+    listen_thread.join();
+    ASSERT_FALSE(svr.is_running());
+  });
+
+  svr.wait_until_ready();
+
+  Client cli("localhost", PORT);
+
+  {
+    auto res = cli.Get("/exception");
+    ASSERT_TRUE(res);
+    EXPECT_EQ(StatusCode::InternalServerError_500, res->status);
+    ASSERT_TRUE(res->has_header("EXCEPTION_WHAT"));
+    EXPECT_EQ("exception...", res->get_header_value("EXCEPTION_WHAT"));
+  }
+
+  {
+    auto res = cli.Get("/unknown");
+    ASSERT_TRUE(res);
+    EXPECT_EQ(StatusCode::InternalServerError_500, res->status);
+    ASSERT_TRUE(res->has_header("EXCEPTION_WHAT"));
+    EXPECT_EQ("exception\\r\\n...", res->get_header_value("EXCEPTION_WHAT"));
+  }
+}
+
+TEST(ExceptionTest, WithExceptionHandler) {
   Server svr;
 
   svr.set_exception_handler([](const Request & /*req*/, Response &res,
@@ -2021,7 +2096,9 @@ TEST(ExceptionHandlerTest, ContentLength) {
     EXPECT_FALSE(ep == nullptr);
     try {
       std::rethrow_exception(ep);
-    } catch (std::exception &e) { EXPECT_EQ("abc", std::string(e.what())); }
+    } catch (std::exception &e) {
+      EXPECT_EQ("abc", std::string(e.what()));
+    } catch (...) {}
     res.status = StatusCode::InternalServerError_500;
     res.set_content("abcdefghijklmnopqrstuvwxyz",
                     "text/html"); // <= Content-Length still 13 at this point
@@ -2045,7 +2122,7 @@ TEST(ExceptionHandlerTest, ContentLength) {
     Client cli(HOST, PORT);
 
     for (size_t j = 0; j < 100; j++) {
-      auto res = cli.Get("/hi");
+      auto res = cli.Get("/hi", {{"Accept-Encoding", ""}});
       ASSERT_TRUE(res);
       EXPECT_EQ(StatusCode::InternalServerError_500, res->status);
       EXPECT_EQ("text/html", res->get_header_value("Content-Type"));
@@ -2056,7 +2133,7 @@ TEST(ExceptionHandlerTest, ContentLength) {
     cli.set_keep_alive(true);
 
     for (size_t j = 0; j < 100; j++) {
-      auto res = cli.Get("/hi");
+      auto res = cli.Get("/hi", {{"Accept-Encoding", ""}});
       ASSERT_TRUE(res);
       EXPECT_EQ(StatusCode::InternalServerError_500, res->status);
       EXPECT_EQ("text/html", res->get_header_value("Content-Type"));
@@ -2065,6 +2142,66 @@ TEST(ExceptionHandlerTest, ContentLength) {
     }
   }
 }
+
+TEST(ExceptionTest, AndErrorHandler) {
+  Server svr;
+
+  svr.set_error_handler([](const Request & /*req*/, Response &res) {
+    if (res.body.empty()) { res.set_content("NOT_FOUND", "text/html"); }
+  });
+
+  svr.set_exception_handler(
+      [](const Request & /*req*/, Response &res, std::exception_ptr ep) {
+        EXPECT_FALSE(ep == nullptr);
+        try {
+          std::rethrow_exception(ep);
+        } catch (std::exception &e) {
+          res.set_content(e.what(), "text/html");
+        } catch (...) {}
+        res.status = StatusCode::InternalServerError_500;
+      });
+
+  svr.Get("/exception", [](const Request & /*req*/, Response & /*res*/) {
+    throw std::runtime_error("EXCEPTION");
+  });
+
+  svr.Get("/error", [](const Request & /*req*/, Response &res) {
+    res.set_content("ERROR", "text/html");
+    res.status = StatusCode::InternalServerError_500;
+  });
+
+  auto thread = std::thread([&]() { svr.listen(HOST, PORT); });
+  auto se = detail::scope_exit([&] {
+    svr.stop();
+    thread.join();
+    ASSERT_FALSE(svr.is_running());
+  });
+
+  svr.wait_until_ready();
+
+  Client cli(HOST, PORT);
+
+  {
+    auto res = cli.Get("/exception");
+    ASSERT_TRUE(res);
+    EXPECT_EQ("text/html", res->get_header_value("Content-Type"));
+    EXPECT_EQ("EXCEPTION", res->body);
+  }
+
+  {
+    auto res = cli.Get("/error");
+    ASSERT_TRUE(res);
+    EXPECT_EQ(StatusCode::InternalServerError_500, res->status);
+    EXPECT_EQ("ERROR", res->body);
+  }
+
+  {
+    auto res = cli.Get("/invalid");
+    ASSERT_TRUE(res);
+    EXPECT_EQ(StatusCode::NotFound_404, res->status);
+    EXPECT_EQ("NOT_FOUND", res->body);
+  }
+}
 #endif
 
 TEST(NoContentTest, ContentLength) {
@@ -2934,6 +3071,16 @@ TEST_F(ServerTest, GetFileContent) {
   EXPECT_EQ("test.html", res->body);
 }
 
+TEST_F(ServerTest, GetFileContentWithRange) {
+  auto res = cli_.Get("/file_content", {{make_range_header({{1, 3}})}});
+  ASSERT_TRUE(res);
+  EXPECT_EQ(StatusCode::PartialContent_206, res->status);
+  EXPECT_EQ("text/html", res->get_header_value("Content-Type"));
+  EXPECT_EQ("bytes 1-3/9", res->get_header_value("Content-Range"));
+  EXPECT_EQ(3, std::stoi(res->get_header_value("Content-Length")));
+  EXPECT_EQ("est", res->body);
+}
+
 TEST_F(ServerTest, GetFileContentWithContentType) {
   auto res = cli_.Get("/file_content_with_content_type");
   ASSERT_TRUE(res);
@@ -3692,16 +3839,21 @@ TEST_F(ServerTest, GetStreamedWithRangeError) {
 TEST_F(ServerTest, GetRangeWithMaxLongLength) {
   auto res = cli_.Get(
       "/with-range",
-      {{"Range",
-        "bytes=0-" + std::to_string(std::numeric_limits<long>::max())}});
-  EXPECT_EQ(StatusCode::RangeNotSatisfiable_416, res->status);
-  EXPECT_EQ("0", res->get_header_value("Content-Length"));
-  EXPECT_EQ(false, res->has_header("Content-Range"));
-  EXPECT_EQ(0U, res->body.size());
+      {{"Range", "bytes=0-" + std::to_string(std::numeric_limits<long>::max())},
+       {"Accept-Encoding", ""}});
+  ASSERT_TRUE(res);
+  EXPECT_EQ(StatusCode::PartialContent_206, res->status);
+  EXPECT_EQ("7", res->get_header_value("Content-Length"));
+  EXPECT_EQ(true, res->has_header("Content-Range"));
+  EXPECT_EQ("bytes 0-6/7", res->get_header_value("Content-Range"));
+  EXPECT_EQ(std::string("abcdefg"), res->body);
 }
 
 TEST_F(ServerTest, GetRangeWithZeroToInfinite) {
-  auto res = cli_.Get("/with-range", {{"Range", "bytes=0-"}});
+  auto res = cli_.Get("/with-range", {
+                                         {"Range", "bytes=0-"},
+                                         {"Accept-Encoding", ""},
+                                     });
   ASSERT_TRUE(res);
   EXPECT_EQ(StatusCode::PartialContent_206, res->status);
   EXPECT_EQ("7", res->get_header_value("Content-Length"));
@@ -3797,7 +3949,10 @@ TEST_F(ServerTest, ClientStop) {
 }
 
 TEST_F(ServerTest, GetWithRange1) {
-  auto res = cli_.Get("/with-range", {{make_range_header({{3, 5}})}});
+  auto res = cli_.Get("/with-range", {
+                                         make_range_header({{3, 5}}),
+                                         {"Accept-Encoding", ""},
+                                     });
   ASSERT_TRUE(res);
   EXPECT_EQ(StatusCode::PartialContent_206, res->status);
   EXPECT_EQ("3", res->get_header_value("Content-Length"));
@@ -3807,7 +3962,10 @@ TEST_F(ServerTest, GetWithRange1) {
 }
 
 TEST_F(ServerTest, GetWithRange2) {
-  auto res = cli_.Get("/with-range", {{make_range_header({{1, -1}})}});
+  auto res = cli_.Get("/with-range", {
+                                         make_range_header({{1, -1}}),
+                                         {"Accept-Encoding", ""},
+                                     });
   ASSERT_TRUE(res);
   EXPECT_EQ(StatusCode::PartialContent_206, res->status);
   EXPECT_EQ("6", res->get_header_value("Content-Length"));
@@ -3817,7 +3975,10 @@ TEST_F(ServerTest, GetWithRange2) {
 }
 
 TEST_F(ServerTest, GetWithRange3) {
-  auto res = cli_.Get("/with-range", {{make_range_header({{0, 0}})}});
+  auto res = cli_.Get("/with-range", {
+                                         make_range_header({{0, 0}}),
+                                         {"Accept-Encoding", ""},
+                                     });
   ASSERT_TRUE(res);
   EXPECT_EQ(StatusCode::PartialContent_206, res->status);
   EXPECT_EQ("1", res->get_header_value("Content-Length"));
@@ -3827,7 +3988,10 @@ TEST_F(ServerTest, GetWithRange3) {
 }
 
 TEST_F(ServerTest, GetWithRange4) {
-  auto res = cli_.Get("/with-range", {{make_range_header({{-1, 2}})}});
+  auto res = cli_.Get("/with-range", {
+                                         make_range_header({{-1, 2}}),
+                                         {"Accept-Encoding", ""},
+                                     });
   ASSERT_TRUE(res);
   EXPECT_EQ(StatusCode::PartialContent_206, res->status);
   EXPECT_EQ("2", res->get_header_value("Content-Length"));
@@ -4141,7 +4305,10 @@ TEST_F(ServerTest, PutLargeFileWithGzip2) {
   ASSERT_TRUE(res);
   EXPECT_EQ(StatusCode::OK_200, res->status);
   EXPECT_EQ(LARGE_DATA, res->body);
-  EXPECT_EQ(101942u, res.get_request_header_value_u64("Content-Length"));
+  // The compressed size should be less than a 10th of the original. May vary
+  // depending on the zlib library.
+  EXPECT_LT(res.get_request_header_value_u64("Content-Length"),
+            static_cast<uint64_t>(10 * 1024 * 1024));
   EXPECT_EQ("gzip", res.get_request_header_value("Content-Encoding"));
 }
 
@@ -4572,7 +4739,9 @@ TEST_F(ServerTest, Gzip) {
 }
 
 TEST_F(ServerTest, GzipWithoutAcceptEncoding) {
-  auto res = cli_.Get("/compress");
+  Headers headers;
+  headers.emplace("Accept-Encoding", "");
+  auto res = cli_.Get("/compress", headers);
 
   ASSERT_TRUE(res);
   EXPECT_TRUE(res->get_header_value("Content-Encoding").empty());
@@ -4621,12 +4790,16 @@ TEST_F(ServerTest, GzipWithoutDecompressing) {
 }
 
 TEST_F(ServerTest, GzipWithContentReceiverWithoutAcceptEncoding) {
+  Headers headers;
+  headers.emplace("Accept-Encoding", "");
+
   std::string body;
-  auto res = cli_.Get("/compress", [&](const char *data, uint64_t data_length) {
-    EXPECT_EQ(100U, data_length);
-    body.append(data, data_length);
-    return true;
-  });
+  auto res = cli_.Get("/compress", headers,
+                      [&](const char *data, uint64_t data_length) {
+                        EXPECT_EQ(100U, data_length);
+                        body.append(data, data_length);
+                        return true;
+                      });
 
   ASSERT_TRUE(res);
   EXPECT_TRUE(res->get_header_value("Content-Encoding").empty());
@@ -4763,8 +4936,10 @@ TEST(ServerRequestParsingTest, TrimWhitespaceFromHeaderValues) {
                           "Connection: close\r\n"
                           "\r\n";
 
-  ASSERT_TRUE(send_request(5, req));
-  EXPECT_EQ(header_value, "\v bar \x1B");
+  std::string res;
+  ASSERT_TRUE(send_request(5, req, &res));
+  EXPECT_EQ(header_value, "");
+  EXPECT_EQ("HTTP/1.1 400 Bad Request", res.substr(0, 24));
 }
 
 // Sends a raw request and verifies that there isn't a crash or exception.
@@ -4922,6 +5097,14 @@ TEST(ServerRequestParsingTest, InvalidFieldValueContains_CR_LF_NUL) {
   EXPECT_EQ("HTTP/1.1 400 Bad Request", out.substr(0, 24));
 }
 
+TEST(ServerRequestParsingTest, InvalidFieldValueContains_LF) {
+  std::string out;
+  std::string request(
+      "GET /header_field_value_check HTTP/1.1\r\nTest: [\n\n\n]\r\n\r\n", 55);
+  test_raw_request(request, &out);
+  EXPECT_EQ("HTTP/1.1 400 Bad Request", out.substr(0, 24));
+}
+
 TEST(ServerRequestParsingTest, EmptyFieldValue) {
   std::string out;
 
@@ -5170,18 +5353,9 @@ TEST(MountTest, Redicect) {
   EXPECT_EQ(StatusCode::OK_200, res->status);
 }
 
-#ifndef CPPHTTPLIB_NO_EXCEPTIONS
-TEST(ExceptionTest, ThrowExceptionInHandler) {
+TEST(MountTest, MultibytesPathName) {
   Server svr;
 
-  svr.Get("/exception", [&](const Request & /*req*/, Response & /*res*/) {
-    throw std::runtime_error("exception...");
-  });
-
-  svr.Get("/unknown", [&](const Request & /*req*/, Response & /*res*/) {
-    throw std::runtime_error("exception\r\n...");
-  });
-
   auto listen_thread = std::thread([&svr]() { svr.listen("localhost", PORT); });
   auto se = detail::scope_exit([&] {
     svr.stop();
@@ -5189,27 +5363,16 @@ TEST(ExceptionTest, ThrowExceptionInHandler) {
     ASSERT_FALSE(svr.is_running());
   });
 
+  svr.set_mount_point("/", "./www");
   svr.wait_until_ready();
 
   Client cli("localhost", PORT);
 
-  {
-    auto res = cli.Get("/exception");
-    ASSERT_TRUE(res);
-    EXPECT_EQ(StatusCode::InternalServerError_500, res->status);
-    ASSERT_TRUE(res->has_header("EXCEPTION_WHAT"));
-    EXPECT_EQ("exception...", res->get_header_value("EXCEPTION_WHAT"));
-  }
-
-  {
-    auto res = cli.Get("/unknown");
-    ASSERT_TRUE(res);
-    EXPECT_EQ(StatusCode::InternalServerError_500, res->status);
-    ASSERT_TRUE(res->has_header("EXCEPTION_WHAT"));
-    EXPECT_EQ("exception\\r\\n...", res->get_header_value("EXCEPTION_WHAT"));
-  }
+  auto res = cli.Get(u8"/日本語Dir/日本語File.txt");
+  ASSERT_TRUE(res);
+  EXPECT_EQ(StatusCode::OK_200, res->status);
+  EXPECT_EQ(u8"日本語コンテンツ", res->body);
 }
-#endif
 
 TEST(KeepAliveTest, ReadTimeout) {
   Server svr;
@@ -5506,6 +5669,7 @@ TEST(LongPollingTest, ClientCloseDetection) {
           auto count = 10;
           while (count > 0 && sink.is_writable()) {
             this_thread::sleep_for(chrono::milliseconds(10));
+            count--;
           }
           EXPECT_FALSE(sink.is_writable()); // the socket is closed
           return true;
@@ -6025,6 +6189,18 @@ TEST(SSLClientTest, WildcardHostNameMatch_Online) {
   ASSERT_EQ(StatusCode::OK_200, res->status);
 }
 
+TEST(SSLClientTest, Issue2004) {
+  Client client("https://google.com");
+  client.set_follow_location(true);
+
+  auto res = client.Get("/");
+  ASSERT_TRUE(res);
+  ASSERT_EQ(StatusCode::OK_200, res->status);
+
+  auto body = res->body;
+  EXPECT_EQ(body.substr(0, 15), "<!doctype html>");
+}
+
 #if 0
 TEST(SSLClientTest, SetInterfaceWithINET6) {
   auto cli = std::make_shared<httplib::Client>("https://httpbin.org");
@@ -6436,6 +6612,40 @@ TEST(SendAPI, SimpleInterface_Online) {
   EXPECT_EQ(StatusCode::MovedPermanently_301, res->status);
 }
 
+TEST(SendAPI, WithParamsInRequest) {
+  Server svr;
+
+  svr.Get("/", [&](const Request &req, Response & /*res*/) {
+    EXPECT_TRUE(req.has_param("test"));
+    EXPECT_EQ("test_value", req.get_param_value("test"));
+  });
+
+  auto t = std::thread([&]() { svr.listen(HOST, PORT); });
+
+  auto se = detail::scope_exit([&] {
+    svr.stop();
+    t.join();
+    ASSERT_FALSE(svr.is_running());
+  });
+
+  svr.wait_until_ready();
+
+  Client cli(HOST, PORT);
+
+  {
+    Request req;
+    req.method = "GET";
+    req.path = "/";
+    req.params.emplace("test", "test_value");
+    auto res = cli.send(req);
+    ASSERT_TRUE(res);
+  }
+  {
+    auto res = cli.Get("/", {{"test", "test_value"}}, Headers{});
+    ASSERT_TRUE(res);
+  }
+}
+
 TEST(ClientImplMethods, GetSocketTest) {
   httplib::Server svr;
   svr.Get("/", [&](const httplib::Request & /*req*/, httplib::Response &res) {
@@ -7331,9 +7541,9 @@ TEST(MultipartFormDataTest, CloseDelimiterWithoutCRLF) {
              "text2"
              "\r\n------------";
 
-  std::string resonse;
-  ASSERT_TRUE(send_request(1, req, &resonse));
-  ASSERT_EQ("200", resonse.substr(9, 3));
+  std::string response;
+  ASSERT_TRUE(send_request(1, req, &response));
+  ASSERT_EQ("200", response.substr(9, 3));
 }
 
 TEST(MultipartFormDataTest, ContentLength) {
@@ -7378,11 +7588,10 @@ TEST(MultipartFormDataTest, ContentLength) {
              "text2"
              "\r\n------------\r\n";
 
-  std::string resonse;
-  ASSERT_TRUE(send_request(1, req, &resonse));
-  ASSERT_EQ("200", resonse.substr(9, 3));
+  std::string response;
+  ASSERT_TRUE(send_request(1, req, &response));
+  ASSERT_EQ("200", response.substr(9, 3));
 }
-
 #endif
 
 TEST(TaskQueueTest, IncreaseAtomicInteger) {
@@ -7760,6 +7969,114 @@ TEST(DirtyDataRequestTest, HeadFieldValueContains_CR_LF_NUL) {
   cli.Get("/test", {{"Test", "_\n\r_\n\r_"}});
 }
 
+TEST(InvalidHeaderCharsTest, is_field_name) {
+  EXPECT_TRUE(detail::fields::is_field_name("exampleToken"));
+  EXPECT_TRUE(detail::fields::is_field_name("token123"));
+  EXPECT_TRUE(detail::fields::is_field_name("!#$%&'*+-.^_`|~"));
+
+  EXPECT_FALSE(detail::fields::is_field_name("example token"));
+  EXPECT_FALSE(detail::fields::is_field_name(" example_token"));
+  EXPECT_FALSE(detail::fields::is_field_name("example_token "));
+  EXPECT_FALSE(detail::fields::is_field_name("token@123"));
+  EXPECT_FALSE(detail::fields::is_field_name(""));
+  EXPECT_FALSE(detail::fields::is_field_name("example\rtoken"));
+  EXPECT_FALSE(detail::fields::is_field_name("example\ntoken"));
+  EXPECT_FALSE(detail::fields::is_field_name(std::string("\0", 1)));
+  EXPECT_FALSE(detail::fields::is_field_name("example\ttoken"));
+}
+
+TEST(InvalidHeaderCharsTest, is_field_value) {
+  EXPECT_TRUE(detail::fields::is_field_value("exampleToken"));
+  EXPECT_TRUE(detail::fields::is_field_value("token123"));
+  EXPECT_TRUE(detail::fields::is_field_value("!#$%&'*+-.^_`|~"));
+
+  EXPECT_TRUE(detail::fields::is_field_value("example token"));
+  EXPECT_FALSE(detail::fields::is_field_value(" example_token"));
+  EXPECT_FALSE(detail::fields::is_field_value("example_token "));
+  EXPECT_TRUE(detail::fields::is_field_value("token@123"));
+  EXPECT_TRUE(detail::fields::is_field_value(""));
+  EXPECT_FALSE(detail::fields::is_field_value("example\rtoken"));
+  EXPECT_FALSE(detail::fields::is_field_value("example\ntoken"));
+  EXPECT_FALSE(detail::fields::is_field_value(std::string("\0", 1)));
+  EXPECT_TRUE(detail::fields::is_field_value("example\ttoken"));
+
+  EXPECT_TRUE(detail::fields::is_field_value("0"));
+}
+
+TEST(InvalidHeaderCharsTest, OnServer) {
+  Server svr;
+
+  svr.Get("/test_name", [&](const Request &req, Response &res) {
+    std::string header = "Not Set";
+    if (req.has_param("header")) { header = req.get_param_value("header"); }
+
+    res.set_header(header, "value");
+    res.set_content("Page Content Page Content", "text/plain");
+  });
+
+  svr.Get("/test_value", [&](const Request &req, Response &res) {
+    std::string header = "Not Set";
+    if (req.has_param("header")) { header = req.get_param_value("header"); }
+
+    res.set_header("X-Test", header);
+    res.set_content("Page Content Page Content", "text/plain");
+  });
+
+  auto thread = std::thread([&]() { svr.listen(HOST, PORT); });
+
+  auto se = detail::scope_exit([&] {
+    svr.stop();
+    thread.join();
+    ASSERT_FALSE(svr.is_running());
+  });
+
+  svr.wait_until_ready();
+
+  Client cli(HOST, PORT);
+  {
+    auto res = cli.Get(
+        R"(/test_name?header=Value%00%0d%0aHEADER_KEY%3aHEADER_VALUE%0d%0a%0d%0aBODY_BODY_BODY)");
+
+    ASSERT_TRUE(res);
+    EXPECT_EQ("Page Content Page Content", res->body);
+    EXPECT_FALSE(res->has_header("HEADER_KEY"));
+  }
+  {
+    auto res = cli.Get(
+        R"(/test_value?header=Value%00%0d%0aHEADER_KEY%3aHEADER_VALUE%0d%0a%0d%0aBODY_BODY_BODY)");
+
+    ASSERT_TRUE(res);
+    EXPECT_EQ("Page Content Page Content", res->body);
+    EXPECT_FALSE(res->has_header("HEADER_KEY"));
+  }
+}
+
+TEST(InvalidHeaderValueTest, InvalidContentLength) {
+  auto handled = false;
+
+  Server svr;
+  svr.Post("/test", [&](const Request &, Response &) { handled = true; });
+
+  thread t = thread([&] { svr.listen(HOST, PORT); });
+  auto se = detail::scope_exit([&] {
+    svr.stop();
+    t.join();
+    ASSERT_FALSE(svr.is_running());
+    ASSERT_FALSE(handled);
+  });
+
+  svr.wait_until_ready();
+
+  auto req = "POST /test HTTP/1.1\r\n"
+             "Content-Length: x\r\n"
+             "\r\n";
+
+  std::string response;
+  ASSERT_TRUE(send_request(1, req, &response));
+  ASSERT_EQ("HTTP/1.1 400 Bad Request",
+            response.substr(0, response.find("\r\n")));
+}
+
 #ifndef _WIN32
 TEST(Expect100ContinueTest, ServerClosesConnection) {
   static constexpr char reject[] = "Unauthorized";

test/test.vcxproj

@@ -28,26 +28,26 @@
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
-    <PlatformToolset>v142</PlatformToolset>
+    <PlatformToolset>v143</PlatformToolset>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
-    <PlatformToolset>v142</PlatformToolset>
+    <PlatformToolset>v143</PlatformToolset>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
-    <PlatformToolset>v142</PlatformToolset>
+    <PlatformToolset>v143</PlatformToolset>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
-    <PlatformToolset>v142</PlatformToolset>
+    <PlatformToolset>v143</PlatformToolset>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
@@ -177,4 +177,4 @@
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
   <ImportGroup Label="ExtensionTargets">
   </ImportGroup>
-</Project>
+</Project>

test/www/日本語Dir/日本語File.txt

@@ -0,0 +1 @@
+日本語コンテンツ