1 files changed, 793 insertions, 360 deletions

diff --git a/externals/httplib/httplib.h b/externals/httplib/httplib.h
index 002b874b9..ad4ce279e 100644
--- a/externals/httplib/httplib.h
+++ b/externals/httplib/httplib.h
@@ -114,13 +114,14 @@ using socket_t = SOCKET;
 
 #include <arpa/inet.h>
 #include <cstring>
+#include <ifaddrs.h>
 #include <netdb.h>
 #include <netinet/in.h>
 #ifdef CPPHTTPLIB_USE_POLL
 #include <poll.h>
 #endif
-#include <pthread.h>
 #include <csignal>
+#include <pthread.h>
 #include <sys/select.h>
 #include <sys/socket.h>
 #include <unistd.h>
@@ -129,8 +130,9 @@ using socket_t = int;
 #define INVALID_SOCKET (-1)
 #endif //_WIN32
 
-#include <cassert>
+#include <array>
 #include <atomic>
+#include <cassert>
 #include <condition_variable>
 #include <errno.h>
 #include <fcntl.h>
@@ -145,13 +147,16 @@ using socket_t = int;
 #include <string>
 #include <sys/stat.h>
 #include <thread>
-#include <array>
 
 #ifdef CPPHTTPLIB_OPENSSL_SUPPORT
 #include <openssl/err.h>
+#include <openssl/md5.h>
 #include <openssl/ssl.h>
 #include <openssl/x509v3.h>
 
+#include <iomanip>
+#include <sstream>
+
 // #if OPENSSL_VERSION_NUMBER < 0x1010100fL
 // #error Sorry, OpenSSL versions prior to 1.1.1 are not supported
 // #endif
@@ -196,27 +201,17 @@ using DataSink = std::function<void(const char *data, size_t data_len)>;
 
 using Done = std::function<void()>;
 
-using ContentProvider = std::function<void(size_t offset, size_t length, DataSink sink)>;
-
-using ContentProviderWithCloser = std::function<void(size_t offset, size_t length, DataSink sink, Done done)>;
-
-using ContentReceiver = std::function<bool(const char *data, size_t data_length)>;
+using ContentProvider =
+    std::function<void(size_t offset, size_t length, DataSink sink)>;
 
-using ContentReader = std::function<bool(ContentReceiver receiver)>;
+using ContentProviderWithCloser =
+    std::function<void(size_t offset, size_t length, DataSink sink, Done done)>;
 
 using Progress = std::function<bool(uint64_t current, uint64_t total)>;
 
 struct Response;
 using ResponseHandler = std::function<bool(const Response &response)>;
 
-struct MultipartFile {
-  std::string filename;
-  std::string content_type;
-  size_t offset = 0;
-  size_t length = 0;
-};
-using MultipartFiles = std::multimap<std::string, MultipartFile>;
-
 struct MultipartFormData {
   std::string name;
   std::string content;
@@ -224,6 +219,33 @@ struct MultipartFormData {
   std::string content_type;
 };
 using MultipartFormDataItems = std::vector<MultipartFormData>;
+using MultipartFormDataMap = std::multimap<std::string, MultipartFormData>;
+
+using ContentReceiver =
+    std::function<bool(const char *data, size_t data_length)>;
+
+using MultipartContentHeader =
+    std::function<bool(const MultipartFormData &file)>;
+
+class ContentReader {
+public:
+  using Reader = std::function<bool(ContentReceiver receiver)>;
+  using MultipartReader = std::function<bool(MultipartContentHeader header,
+                                             ContentReceiver receiver)>;
+
+  ContentReader(Reader reader, MultipartReader muitlpart_reader)
+      : reader_(reader), muitlpart_reader_(muitlpart_reader) {}
+
+  bool operator()(MultipartContentHeader header,
+                  ContentReceiver receiver) const {
+    return muitlpart_reader_(header, receiver);
+  }
+
+  bool operator()(ContentReceiver receiver) const { return reader_(receiver); }
+
+  Reader reader_;
+  MultipartReader muitlpart_reader_;
+};
 
 using Range = std::pair<ssize_t, ssize_t>;
 using Ranges = std::vector<Range>;
@@ -238,7 +260,7 @@ struct Request {
   std::string version;
   std::string target;
   Params params;
-  MultipartFiles files;
+  MultipartFormDataMap files;
   Ranges ranges;
   Match matches;
 
@@ -262,8 +284,10 @@ struct Request {
   std::string get_param_value(const char *key, size_t id = 0) const;
   size_t get_param_value_count(const char *key) const;
 
+  bool is_multipart_form_data() const;
+
   bool has_file(const char *key) const;
-  MultipartFile get_file_value(const char *key) const;
+  MultipartFormData get_file_value(const char *key) const;
 
   // private members...
   size_t content_length;
@@ -394,7 +418,7 @@ public:
     cond_.notify_all();
 
     // Join...
-    for (auto& t : threads_) {
+    for (auto &t : threads_) {
       t.join();
     }
   }
@@ -475,20 +499,17 @@ public:
   NoThread() {}
   virtual ~NoThread() {}
 
-  virtual void enqueue(std::function<void()> fn) override {
-    fn();
-  }
+  virtual void enqueue(std::function<void()> fn) override { fn(); }
 
-  virtual void shutdown() override {
-  }
+  virtual void shutdown() override {}
 };
 #endif
 
 class Server {
 public:
   using Handler = std::function<void(const Request &, Response &)>;
-  using HandlerWithContentReader = std::function<void(const Request &, Response &,
-                             const ContentReader &content_reader)>;
+  using HandlerWithContentReader = std::function<void(
+      const Request &, Response &, const ContentReader &content_reader)>;
   using Logger = std::function<void(const Request &, const Response &)>;
 
   Server();
@@ -507,7 +528,7 @@ public:
   Server &Delete(const char *pattern, Handler handler);
   Server &Options(const char *pattern, Handler handler);
 
-  bool set_base_dir(const char *path);
+  bool set_base_dir(const char *dir, const char *mount_point = nullptr);
   void set_file_request_handler(Handler handler);
 
   void set_error_handler(Handler handler);
@@ -531,7 +552,7 @@ public:
 protected:
   bool process_request(Stream &strm, bool last_connection,
                        bool &connection_close,
-                       const std::function<void(Request &)>& setup_request);
+                       const std::function<void(Request &)> &setup_request);
 
   size_t keep_alive_max_count_;
   time_t read_timeout_sec_;
@@ -540,7 +561,8 @@ protected:
 
 private:
   using Handlers = std::vector<std::pair<std::regex, Handler>>;
-  using HandersForContentReader = std::vector<std::pair<std::regex, HandlerWithContentReader>>;
+  using HandersForContentReader =
+      std::vector<std::pair<std::regex, HandlerWithContentReader>>;
 
   socket_t create_server_socket(const char *host, int port,
                                 int socket_flags) const;
@@ -562,23 +584,28 @@ private:
                                    const std::string &content_type);
   bool read_content(Stream &strm, bool last_connection, Request &req,
                     Response &res);
-  bool read_content_with_content_receiver(Stream &strm, bool last_connection,
-                                          Request &req, Response &res,
-                                          ContentReceiver reveiver);
+  bool read_content_with_content_receiver(
+      Stream &strm, bool last_connection, Request &req, Response &res,
+      ContentReceiver receiver, MultipartContentHeader multipart_header,
+      ContentReceiver multipart_receiver);
+  bool read_content_core(Stream &strm, bool last_connection, Request &req,
+                         Response &res, ContentReceiver receiver,
+                         MultipartContentHeader mulitpart_header,
+                         ContentReceiver multipart_receiver);
 
   virtual bool process_and_close_socket(socket_t sock);
 
   std::atomic<bool> is_running_;
   std::atomic<socket_t> svr_sock_;
-  std::string base_dir_;
+  std::vector<std::pair<std::string, std::string>> base_dirs_;
   Handler file_request_handler_;
   Handlers get_handlers_;
   Handlers post_handlers_;
-  HandersForContentReader post_handlers_for_content_reader;
+  HandersForContentReader post_handlers_for_content_reader_;
   Handlers put_handlers_;
-  HandersForContentReader put_handlers_for_content_reader;
+  HandersForContentReader put_handlers_for_content_reader_;
   Handlers patch_handlers_;
-  HandersForContentReader patch_handlers_for_content_reader;
+  HandersForContentReader patch_handlers_for_content_reader_;
   Handlers delete_handlers_;
   Handlers options_handlers_;
   Handler error_handler_;
@@ -629,78 +656,63 @@ public:
   std::shared_ptr<Response> Head(const char *path, const Headers &headers);
 
   std::shared_ptr<Response> Post(const char *path, const std::string &body,
-                                 const char *content_type,
-                                 bool compress = false);
+                                 const char *content_type);
 
   std::shared_ptr<Response> Post(const char *path, const Headers &headers,
                                  const std::string &body,
-                                 const char *content_type,
-                                 bool compress = false);
+                                 const char *content_type);
 
   std::shared_ptr<Response> Post(const char *path, size_t content_length,
                                  ContentProvider content_provider,
-                                 const char *content_type,
-                                 bool compress = false);
+                                 const char *content_type);
 
   std::shared_ptr<Response> Post(const char *path, const Headers &headers,
                                  size_t content_length,
                                  ContentProvider content_provider,
-                                 const char *content_type,
-                                 bool compress = false);
+                                 const char *content_type);
 
-  std::shared_ptr<Response> Post(const char *path, const Params &params,
-                                 bool compress = false);
+  std::shared_ptr<Response> Post(const char *path, const Params &params);
 
   std::shared_ptr<Response> Post(const char *path, const Headers &headers,
-                                 const Params &params, bool compress = false);
+                                 const Params &params);
 
   std::shared_ptr<Response> Post(const char *path,
-                                 const MultipartFormDataItems &items,
-                                 bool compress = false);
+                                 const MultipartFormDataItems &items);
 
   std::shared_ptr<Response> Post(const char *path, const Headers &headers,
-                                 const MultipartFormDataItems &items,
-                                 bool compress = false);
+                                 const MultipartFormDataItems &items);
 
   std::shared_ptr<Response> Put(const char *path, const std::string &body,
-                                const char *content_type,
-                                bool compress = false);
+                                const char *content_type);
 
   std::shared_ptr<Response> Put(const char *path, const Headers &headers,
                                 const std::string &body,
-                                const char *content_type,
-                                bool compress = false);
+                                const char *content_type);
 
   std::shared_ptr<Response> Put(const char *path, size_t content_length,
                                 ContentProvider content_provider,
-                                const char *content_type,
-                                bool compress = false);
+                                const char *content_type);
 
   std::shared_ptr<Response> Put(const char *path, const Headers &headers,
                                 size_t content_length,
                                 ContentProvider content_provider,
-                                const char *content_type,
-                                bool compress = false);
+                                const char *content_type);
 
   std::shared_ptr<Response> Patch(const char *path, const std::string &body,
-                                  const char *content_type,
-                                  bool compress = false);
+                                  const char *content_type);
 
   std::shared_ptr<Response> Patch(const char *path, const Headers &headers,
                                   const std::string &body,
-                                  const char *content_type,
-                                  bool compress = false);
+                                  const char *content_type);
 
   std::shared_ptr<Response> Patch(const char *path, size_t content_length,
                                   ContentProvider content_provider,
-                                  const char *content_type,
-                                  bool compress = false);
+                                  const char *content_type);
 
   std::shared_ptr<Response> Patch(const char *path, const Headers &headers,
                                   size_t content_length,
                                   ContentProvider content_provider,
-                                  const char *content_type,
-                                  bool compress = false);
+                                  const char *content_type);
 
   std::shared_ptr<Response> Delete(const char *path);
 
@@ -723,9 +735,16 @@ public:
             std::vector<Response> &responses);
 
   void set_keep_alive_max_count(size_t count);
+
   void set_read_timeout(time_t sec, time_t usec);
 
-  void follow_location(bool on);
+  void set_auth(const char *username, const char *password);
+
+  void set_follow_location(bool on);
+
+  void set_compress(bool on);
+
+  void set_interface(const char *intf);
 
 protected:
   bool process_request(Stream &strm, const Request &req, Response &res,
@@ -738,20 +757,22 @@ protected:
   size_t keep_alive_max_count_;
   time_t read_timeout_sec_;
   time_t read_timeout_usec_;
-  size_t follow_location_;
+  bool follow_location_;
+  std::string username_;
+  std::string password_;
+  bool compress_;
+  std::string interface_;
 
 private:
   socket_t create_client_socket() const;
   bool read_response_line(Stream &strm, Response &res);
-  void write_request(Stream &strm, const Request &req, bool last_connection);
+  bool write_request(Stream &strm, const Request &req, bool last_connection);
   bool redirect(const Request &req, Response &res);
 
-  std::shared_ptr<Response>
-  send_with_content_provider(const char *method, const char *path,
-                             const Headers &headers, const std::string &body,
-                             size_t content_length,
-                             ContentProvider content_provider,
-                             const char *content_type, bool compress);
+  std::shared_ptr<Response> send_with_content_provider(
+      const char *method, const char *path, const Headers &headers,
+      const std::string &body, size_t content_length,
+      ContentProvider content_provider, const char *content_type);
 
   virtual bool process_and_close_socket(
       socket_t sock, size_t request_count,
@@ -870,6 +891,8 @@ private:
 };
 #endif
 
+// ----------------------------------------------------------------------------
+
 /*
  * Implementation
  */
@@ -1037,7 +1060,7 @@ inline void read_file(const std::string &path, std::string &out) {
 
 inline std::string file_extension(const std::string &path) {
   std::smatch m;
-  auto re = std::regex("\\.([a-zA-Z0-9]+)$");
+  static auto re = std::regex("\\.([a-zA-Z0-9]+)$");
   if (std::regex_search(path, m, re)) { return m[1].str(); }
   return std::string();
 }
@@ -1081,6 +1104,11 @@ public:
     }
   }
 
+  bool end_with_crlf() const {
+    auto end = ptr() + size();
+    return size() >= 2 && end[-2] == '\r' && end[-1] == '\n';
+  }
+
   bool getline() {
     fixed_buffer_used_size_ = 0;
     glowable_buffer_.clear();
@@ -1191,7 +1219,8 @@ inline bool wait_until_socket_is_ready(socket_t sock, time_t sec, time_t usec) {
       (FD_ISSET(sock, &fdsr) || FD_ISSET(sock, &fdsw))) {
     int error = 0;
     socklen_t len = sizeof(error);
-    return getsockopt(sock, SOL_SOCKET, SO_ERROR, reinterpret_cast<char*>(&error), &len) >= 0 &&
+    return getsockopt(sock, SOL_SOCKET, SO_ERROR,
+                      reinterpret_cast<char *>(&error), &len) >= 0 &&
            !error;
   }
   return false;
@@ -1323,6 +1352,78 @@ inline bool is_connection_error() {
 #endif
 }
 
+inline bool bind_ip_address(socket_t sock, const char *host) {
+  struct addrinfo hints;
+  struct addrinfo *result;
+
+  memset(&hints, 0, sizeof(struct addrinfo));
+  hints.ai_family = AF_UNSPEC;
+  hints.ai_socktype = SOCK_STREAM;
+  hints.ai_protocol = 0;
+
+  if (getaddrinfo(host, "0", &hints, &result)) { return false; }
+
+  bool ret = false;
+  for (auto rp = result; rp; rp = rp->ai_next) {
+    const auto &ai = *rp;
+    if (!::bind(sock, ai.ai_addr, static_cast<int>(ai.ai_addrlen))) {
+      ret = true;
+      break;
+    }
+  }
+
+  freeaddrinfo(result);
+  return ret;
+}
+
+inline std::string if2ip(const std::string &ifn) {
+#ifndef _WIN32
+  struct ifaddrs *ifap;
+  getifaddrs(&ifap);
+  for (auto ifa = ifap; ifa; ifa = ifa->ifa_next) {
+    if (ifa->ifa_addr && ifn == ifa->ifa_name) {
+      if (ifa->ifa_addr->sa_family == AF_INET) {
+        auto sa = reinterpret_cast<struct sockaddr_in *>(ifa->ifa_addr);
+        char buf[INET_ADDRSTRLEN];
+        if (inet_ntop(AF_INET, &sa->sin_addr, buf, INET_ADDRSTRLEN)) {
+          freeifaddrs(ifap);
+          return std::string(buf, INET_ADDRSTRLEN);
+        }
+      }
+    }
+  }
+  freeifaddrs(ifap);
+#endif
+  return std::string();
+}
+
+inline socket_t create_client_socket(const char *host, int port,
+                                     time_t timeout_sec,
+                                     const std::string &intf) {
+  return create_socket(
+      host, port, [&](socket_t sock, struct addrinfo &ai) -> bool {
+        if (!intf.empty()) {
+          auto ip = if2ip(intf);
+          if (ip.empty()) { ip = intf; }
+          if (!bind_ip_address(sock, ip.c_str())) { return false; }
+        }
+
+        set_nonblocking(sock, true);
+
+        auto ret = ::connect(sock, ai.ai_addr, static_cast<int>(ai.ai_addrlen));
+        if (ret < 0) {
+          if (is_connection_error() ||
+              !wait_until_socket_is_ready(sock, timeout_sec, 0)) {
+            close_socket(sock);
+            return false;
+          }
+        }
+
+        set_nonblocking(sock, false);
+        return true;
+      });
+}
+
 inline std::string get_remote_addr(socket_t sock) {
   struct sockaddr_storage addr;
   socklen_t len = sizeof(addr);
@@ -1330,8 +1431,8 @@ inline std::string get_remote_addr(socket_t sock) {
   if (!getpeername(sock, reinterpret_cast<struct sockaddr *>(&addr), &len)) {
     std::array<char, NI_MAXHOST> ipstr{};
 
-    if (!getnameinfo(reinterpret_cast<struct sockaddr *>(&addr), len, ipstr.data(), ipstr.size(),
-                     nullptr, 0, NI_NUMERICHOST)) {
+    if (!getnameinfo(reinterpret_cast<struct sockaddr *>(&addr), len,
+                     ipstr.data(), ipstr.size(), nullptr, 0, NI_NUMERICHOST)) {
       return ipstr.data();
     }
   }
@@ -1380,6 +1481,7 @@ inline const char *status_message(int status) {
   case 303: return "See Other";
   case 304: return "Not Modified";
   case 400: return "Bad Request";
+  case 401: return "Unauthorized";
   case 403: return "Forbidden";
   case 404: return "Not Found";
   case 413: return "Payload Too Large";
@@ -1420,7 +1522,7 @@ inline bool compress(std::string &content) {
   std::array<char, 16384> buff{};
   do {
     strm.avail_out = buff.size();
-    strm.next_out = reinterpret_cast<Bytef*>(buff.data());
+    strm.next_out = reinterpret_cast<Bytef *>(buff.data());
     ret = deflate(&strm, Z_FINISH);
     assert(ret != Z_STREAM_ERROR);
     compressed.append(buff.data(), buff.size() - strm.avail_out);
@@ -1462,7 +1564,7 @@ public:
     std::array<char, 16384> buff{};
     do {
       strm.avail_out = buff.size();
-      strm.next_out = reinterpret_cast<Bytef*>(buff.data());
+      strm.next_out = reinterpret_cast<Bytef *>(buff.data());
 
       ret = inflate(&strm, Z_NO_FLUSH);
       assert(ret != Z_STREAM_ERROR);
@@ -1472,7 +1574,9 @@ public:
       case Z_MEM_ERROR: inflateEnd(&strm); return false;
       }
 
-      if (!callback(buff.data(), buff.size() - strm.avail_out)) { return false; }
+      if (!callback(buff.data(), buff.size() - strm.avail_out)) {
+        return false;
+      }
     } while (strm.avail_out == 0);
 
     return ret == Z_OK || ret == Z_STREAM_END;
@@ -1506,18 +1610,35 @@ inline uint64_t get_header_value_uint64(const Headers &headers, const char *key,
 }
 
 inline bool read_headers(Stream &strm, Headers &headers) {
-  static std::regex re(R"((.+?):\s*(.+?)\s*\r\n)");
-
   const auto bufsiz = 2048;
   char buf[bufsiz];
-
   stream_line_reader line_reader(strm, buf, bufsiz);
 
   for (;;) {
     if (!line_reader.getline()) { return false; }
-    if (!strcmp(line_reader.ptr(), "\r\n")) { break; }
+
+    // Check if the line ends with CRLF.
+    if (line_reader.end_with_crlf()) {
+      // Blank line indicates end of headers.
+      if (line_reader.size() == 2) { break; }
+    } else {
+      continue; // Skip invalid line.
+    }
+
+    // Skip trailing spaces and tabs.
+    auto end = line_reader.ptr() + line_reader.size() - 2;
+    while (line_reader.ptr() < end && (end[-1] == ' ' || end[-1] == '\t')) {
+      end--;
+    }
+
+    // Horizontal tab and ' ' are considered whitespace and are ignored when on
+    // the left or right side of the header value:
+    //  - https://stackoverflow.com/questions/50179659/
+    //  - https://www.w3.org/Protocols/rfc2616/rfc2616-sec4.html
+    static const std::regex re(R"((.+?):[\t ]*(.+))");
+
     std::cmatch m;
-    if (std::regex_match(line_reader.ptr(), m, re)) {
+    if (std::regex_match(line_reader.ptr(), end, m, re)) {
       auto key = std::string(m[1]);
       auto val = std::string(m[2]);
       headers.emplace(key, val);
@@ -1844,113 +1965,206 @@ inline bool parse_multipart_boundary(const std::string &content_type,
   return true;
 }
 
-inline bool parse_multipart_formdata(const std::string &boundary,
-                                     const std::string &body,
-                                     MultipartFiles &files) {
-  static std::string dash = "--";
-  static std::string crlf = "\r\n";
-
-  static std::regex re_content_type("Content-Type: (.*?)$",
-                                    std::regex_constants::icase);
-
-  static std::regex re_content_disposition(
-      "Content-Disposition: form-data; name=\"(.*?)\"(?:; filename=\"(.*?)\")?",
-      std::regex_constants::icase);
-
-  auto dash_boundary = dash + boundary;
-
-  auto pos = body.find(dash_boundary);
-  if (pos != 0) { return false; }
-
-  pos += dash_boundary.size();
+inline bool parse_range_header(const std::string &s, Ranges &ranges) {
+  static auto re_first_range = std::regex(R"(bytes=(\d*-\d*(?:,\s*\d*-\d*)*))");
+  std::smatch m;
+  if (std::regex_match(s, m, re_first_range)) {
+    auto pos = m.position(1);
+    auto len = m.length(1);
+    bool all_valid_ranges = true;
+    detail::split(
+        &s[pos], &s[pos + len], ',', [&](const char *b, const char *e) {
+          if (!all_valid_ranges) return;
+          static auto re_another_range = std::regex(R"(\s*(\d*)-(\d*))");
+          std::cmatch m;
+          if (std::regex_match(b, e, m, re_another_range)) {
+            ssize_t first = -1;
+            if (!m.str(1).empty()) {
+              first = static_cast<ssize_t>(std::stoll(m.str(1)));
+            }
 
-  auto next_pos = body.find(crlf, pos);
-  if (next_pos == std::string::npos) { return false; }
+            ssize_t last = -1;
+            if (!m.str(2).empty()) {
+              last = static_cast<ssize_t>(std::stoll(m.str(2)));
+            }
 
-  pos = next_pos + crlf.size();
+            if (first != -1 && last != -1 && first > last) {
+              all_valid_ranges = false;
+              return;
+            }
+            ranges.emplace_back(std::make_pair(first, last));
+          }
+        });
+    return all_valid_ranges;
+  }
+  return false;
+}
 
-  while (pos < body.size()) {
-    next_pos = body.find(crlf, pos);
-    if (next_pos == std::string::npos) { return false; }
+class MultipartFormDataParser {
+public:
+  MultipartFormDataParser() {}
 
-    std::string name;
-    MultipartFile file;
+  void set_boundary(const std::string &boundary) { boundary_ = boundary; }
 
-    auto header = body.substr(pos, (next_pos - pos));
+  bool is_valid() const { return is_valid_; }
 
-    while (pos != next_pos) {
-      std::smatch m;
-      if (std::regex_match(header, m, re_content_type)) {
-        file.content_type = m[1];
-      } else if (std::regex_match(header, m, re_content_disposition)) {
-        name = m[1];
-        file.filename = m[2];
+  template <typename T, typename U>
+  bool parse(const char *buf, size_t n, T content_callback, U header_callback) {
+    static const std::regex re_content_type(R"(^Content-Type:\s*(.*?)\s*$)",
+                                            std::regex_constants::icase);
+
+    static const std::regex re_content_disposition(
+        "^Content-Disposition:\\s*form-data;\\s*name=\"(.*?)\"(?:;\\s*filename="
+        "\"(.*?)\")?\\s*$",
+        std::regex_constants::icase);
+
+    buf_.append(buf, n); // TODO: performance improvement
+
+    while (!buf_.empty()) {
+      switch (state_) {
+      case 0: { // Initial boundary
+        auto pattern = dash_ + boundary_ + crlf_;
+        if (pattern.size() > buf_.size()) { return true; }
+        auto pos = buf_.find(pattern);
+        if (pos != 0) {
+          is_done_ = true;
+          return false;
+        }
+        buf_.erase(0, pattern.size());
+        off_ += pattern.size();
+        state_ = 1;
+        break;
       }
+      case 1: { // New entry
+        clear_file_info();
+        state_ = 2;
+        break;
+      }
+      case 2: { // Headers
+        auto pos = buf_.find(crlf_);
+        while (pos != std::string::npos) {
+          // Empty line
+          if (pos == 0) {
+            if (!header_callback(file_)) {
+              is_valid_ = false;
+              is_done_ = false;
+              return false;
+            }
+            buf_.erase(0, crlf_.size());
+            off_ += crlf_.size();
+            state_ = 3;
+            break;
+          }
 
-      pos = next_pos + crlf.size();
-
-      next_pos = body.find(crlf, pos);
-      if (next_pos == std::string::npos) { return false; }
-
-      header = body.substr(pos, (next_pos - pos));
-    }
-
-    pos = next_pos + crlf.size();
-
-    next_pos = body.find(crlf + dash_boundary, pos);
+          auto header = buf_.substr(0, pos);
+          {
+            std::smatch m;
+            if (std::regex_match(header, m, re_content_type)) {
+              file_.content_type = m[1];
+            } else if (std::regex_match(header, m, re_content_disposition)) {
+              file_.name = m[1];
+              file_.filename = m[2];
+            }
+          }
 
-    if (next_pos == std::string::npos) { return false; }
+          buf_.erase(0, pos + crlf_.size());
+          off_ += pos + crlf_.size();
+          pos = buf_.find(crlf_);
+        }
+        break;
+      }
+      case 3: { // Body
+        {
+          auto pattern = crlf_ + dash_;
+          auto pos = buf_.find(pattern);
+          if (pos == std::string::npos) { pos = buf_.size(); }
+          if (!content_callback(buf_.data(), pos)) {
+            is_valid_ = false;
+            is_done_ = false;
+            return false;
+          }
 
-    file.offset = pos;
-    file.length = next_pos - pos;
+          off_ += pos;
+          buf_.erase(0, pos);
+        }
 
-    pos = next_pos + crlf.size() + dash_boundary.size();
+        {
+          auto pattern = crlf_ + dash_ + boundary_;
+          if (pattern.size() > buf_.size()) { return true; }
+
+          auto pos = buf_.find(pattern);
+          if (pos != std::string::npos) {
+            if (!content_callback(buf_.data(), pos)) {
+              is_valid_ = false;
+              is_done_ = false;
+              return false;
+            }
 
-    next_pos = body.find(crlf, pos);
-    if (next_pos == std::string::npos) { return false; }
+            off_ += pos + pattern.size();
+            buf_.erase(0, pos + pattern.size());
+            state_ = 4;
+          } else {
+            if (!content_callback(buf_.data(), pattern.size())) {
+              is_valid_ = false;
+              is_done_ = false;
+              return false;
+            }
 
-    files.emplace(name, file);
+            off_ += pattern.size();
+            buf_.erase(0, pattern.size());
+          }
+        }
+        break;
+      }
+      case 4: { // Boundary
+        if (crlf_.size() > buf_.size()) { return true; }
+        if (buf_.find(crlf_) == 0) {
+          buf_.erase(0, crlf_.size());
+          off_ += crlf_.size();
+          state_ = 1;
+        } else {
+          auto pattern = dash_ + crlf_;
+          if (pattern.size() > buf_.size()) { return true; }
+          if (buf_.find(pattern) == 0) {
+            buf_.erase(0, pattern.size());
+            off_ += pattern.size();
+            is_valid_ = true;
+            state_ = 5;
+          } else {
+            is_done_ = true;
+            return true;
+          }
+        }
+        break;
+      }
+      case 5: { // Done
+        is_valid_ = false;
+        return false;
+      }
+      }
+    }
 
-    pos = next_pos + crlf.size();
+    return true;
   }
 
-  return true;
-}
-
-inline bool parse_range_header(const std::string &s, Ranges &ranges) {
-  try {
-    static auto re_first_range =
-        std::regex(R"(bytes=(\d*-\d*(?:,\s*\d*-\d*)*))");
-    std::smatch m;
-    if (std::regex_match(s, m, re_first_range)) {
-      auto pos = m.position(1);
-      auto len = m.length(1);
-      detail::split(
-          &s[pos], &s[pos + len], ',', [&](const char *b, const char *e) {
-            static auto re_another_range = std::regex(R"(\s*(\d*)-(\d*))");
-            std::cmatch m;
-            if (std::regex_match(b, e, m, re_another_range)) {
-              ssize_t first = -1;
-              if (!m.str(1).empty()) {
-                first = static_cast<ssize_t>(std::stoll(m.str(1)));
-              }
+private:
+  void clear_file_info() {
+    file_.name.clear();
+    file_.filename.clear();
+    file_.content_type.clear();
+  }
 
-              ssize_t last = -1;
-              if (!m.str(2).empty()) {
-                last = static_cast<ssize_t>(std::stoll(m.str(2)));
-              }
+  const std::string dash_ = "--";
+  const std::string crlf_ = "\r\n";
+  std::string boundary_;
 
-              if (first != -1 && last != -1 && first > last) {
-                throw std::runtime_error("invalid range error");
-              }
-              ranges.emplace_back(std::make_pair(first, last));
-            }
-          });
-      return true;
-    }
-    return false;
-  } catch (...) { return false; }
-}
+  std::string buf_;
+  size_t state_ = 0;
+  size_t is_valid_ = false;
+  size_t is_done_ = false;
+  size_t off_ = 0;
+  MultipartFormData file_;
+};
 
 inline std::string to_lower(const char *beg, const char *end) {
   std::string out;
@@ -2102,6 +2316,52 @@ get_range_offset_and_length(const Request &req, const Response &res,
   return std::make_pair(r.first, r.second - r.first + 1);
 }
 
+inline bool expect_content(const Request &req) {
+  if (req.method == "POST" || req.method == "PUT" || req.method == "PATCH" ||
+      req.method == "PRI") {
+    return true;
+  }
+  // TODO: check if Content-Length is set
+  return false;
+}
+
+#ifdef CPPHTTPLIB_OPENSSL_SUPPORT
+template <typename CTX, typename Init, typename Update, typename Final>
+inline std::string message_digest(const std::string &s, Init init,
+                                  Update update, Final final,
+                                  size_t digest_length) {
+  using namespace std;
+
+  std::vector<unsigned char> md(digest_length, 0);
+  CTX ctx;
+  init(&ctx);
+  update(&ctx, s.data(), s.size());
+  final(md.data(), &ctx);
+
+  stringstream ss;
+  for (auto c : md) {
+    ss << setfill('0') << setw(2) << hex << (unsigned int)c;
+  }
+  return ss.str();
+}
+
+inline std::string MD5(const std::string &s) {
+  using namespace detail;
+  return message_digest<MD5_CTX>(s, MD5_Init, MD5_Update, MD5_Final,
+                                 MD5_DIGEST_LENGTH);
+}
+
+inline std::string SHA_256(const std::string &s) {
+  return message_digest<SHA256_CTX>(s, SHA256_Init, SHA256_Update, SHA256_Final,
+                                    SHA256_DIGEST_LENGTH);
+}
+
+inline std::string SHA_512(const std::string &s) {
+  return message_digest<SHA512_CTX>(s, SHA512_Init, SHA512_Update, SHA512_Final,
+                                    SHA512_DIGEST_LENGTH);
+}
+#endif
+
 #ifdef _WIN32
 class WSInit {
 public:
@@ -2139,6 +2399,96 @@ make_basic_authentication_header(const std::string &username,
   return std::make_pair("Authorization", field);
 }
 
+#ifdef CPPHTTPLIB_OPENSSL_SUPPORT
+inline std::pair<std::string, std::string> make_digest_authentication_header(
+    const Request &req, const std::map<std::string, std::string> &auth,
+    size_t cnonce_count, const std::string &cnonce, const std::string &username,
+    const std::string &password) {
+  using namespace std;
+
+  string nc;
+  {
+    stringstream ss;
+    ss << setfill('0') << setw(8) << hex << cnonce_count;
+    nc = ss.str();
+  }
+
+  auto qop = auth.at("qop");
+  if (qop.find("auth-int") != std::string::npos) {
+    qop = "auth-int";
+  } else {
+    qop = "auth";
+  }
+
+  string response;
+  {
+    auto algo = auth.at("algorithm");
+
+    auto H = algo == "SHA-256"
+                 ? detail::SHA_256
+                 : algo == "SHA-512" ? detail::SHA_512 : detail::MD5;
+
+    auto A1 = username + ":" + auth.at("realm") + ":" + password;
+
+    auto A2 = req.method + ":" + req.path;
+    if (qop == "auth-int") { A2 += ":" + H(req.body); }
+
+    response = H(H(A1) + ":" + auth.at("nonce") + ":" + nc + ":" + cnonce +
+                 ":" + qop + ":" + H(A2));
+  }
+
+  auto field = "Digest username=\"hello\", realm=\"" + auth.at("realm") +
+               "\", nonce=\"" + auth.at("nonce") + "\", uri=\"" + req.path +
+               "\", algorithm=" + auth.at("algorithm") + ", qop=" + qop +
+               ", nc=\"" + nc + "\", cnonce=\"" + cnonce + "\", response=\"" +
+               response + "\"";
+
+  return make_pair("Authorization", field);
+}
+#endif
+
+inline int
+parse_www_authenticate(const httplib::Response &res,
+                       std::map<std::string, std::string> &digest_auth) {
+  if (res.has_header("WWW-Authenticate")) {
+    static auto re = std::regex(R"~((?:(?:,\s*)?(.+?)=(?:"(.*?)"|([^,]*))))~");
+    auto s = res.get_header_value("WWW-Authenticate");
+    auto pos = s.find(' ');
+    if (pos != std::string::npos) {
+      auto type = s.substr(0, pos);
+      if (type == "Basic") {
+        return 1;
+      } else if (type == "Digest") {
+        s = s.substr(pos + 1);
+        auto beg = std::sregex_iterator(s.begin(), s.end(), re);
+        for (auto i = beg; i != std::sregex_iterator(); ++i) {
+          auto m = *i;
+          auto key = s.substr(m.position(1), m.length(1));
+          auto val = m.length(2) > 0 ? s.substr(m.position(2), m.length(2))
+                                     : s.substr(m.position(3), m.length(3));
+          digest_auth[key] = val;
+        }
+        return 2;
+      }
+    }
+  }
+  return 0;
+}
+
+// https://stackoverflow.com/questions/440133/how-do-i-create-a-random-alpha-numeric-string-in-c/440240#answer-440240
+inline std::string random_string(size_t length) {
+  auto randchar = []() -> char {
+    const char charset[] = "0123456789"
+                           "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+                           "abcdefghijklmnopqrstuvwxyz";
+    const size_t max_index = (sizeof(charset) - 1);
+    return charset[rand() % max_index];
+  };
+  std::string str(length, 0);
+  std::generate_n(str.begin(), length, randchar);
+  return str;
+}
+
 // Request implementation
 inline bool Request::has_header(const char *key) const {
   return detail::has_header(headers, key);
@@ -2177,14 +2527,19 @@ inline size_t Request::get_param_value_count(const char *key) const {
   return std::distance(r.first, r.second);
 }
 
+inline bool Request::is_multipart_form_data() const {
+  const auto &content_type = get_header_value("Content-Type");
+  return !content_type.find("multipart/form-data");
+}
+
 inline bool Request::has_file(const char *key) const {
   return files.find(key) != files.end();
 }
 
-inline MultipartFile Request::get_file_value(const char *key) const {
+inline MultipartFormData Request::get_file_value(const char *key) const {
   auto it = files.find(key);
   if (it != files.end()) { return it->second; }
-  return MultipartFile();
+  return MultipartFormData();
 }
 
 // Response implementation
@@ -2369,7 +2724,7 @@ inline Server &Server::Post(const char *pattern, Handler handler) {
 
 inline Server &Server::Post(const char *pattern,
                             HandlerWithContentReader handler) {
-  post_handlers_for_content_reader.push_back(
+  post_handlers_for_content_reader_.push_back(
       std::make_pair(std::regex(pattern), handler));
   return *this;
 }
@@ -2381,7 +2736,7 @@ inline Server &Server::Put(const char *pattern, Handler handler) {
 
 inline Server &Server::Put(const char *pattern,
                            HandlerWithContentReader handler) {
-  put_handlers_for_content_reader.push_back(
+  put_handlers_for_content_reader_.push_back(
       std::make_pair(std::regex(pattern), handler));
   return *this;
 }
@@ -2393,7 +2748,7 @@ inline Server &Server::Patch(const char *pattern, Handler handler) {
 
 inline Server &Server::Patch(const char *pattern,
                              HandlerWithContentReader handler) {
-  patch_handlers_for_content_reader.push_back(
+  patch_handlers_for_content_reader_.push_back(
       std::make_pair(std::regex(pattern), handler));
   return *this;
 }
@@ -2408,10 +2763,13 @@ inline Server &Server::Options(const char *pattern, Handler handler) {
   return *this;
 }
 
-inline bool Server::set_base_dir(const char *path) {
-  if (detail::is_dir(path)) {
-    base_dir_ = path;
-    return true;
+inline bool Server::set_base_dir(const char *dir, const char *mount_point) {
+  if (detail::is_dir(dir)) {
+    std::string mnt = mount_point ? mount_point : "/";
+    if (!mnt.empty() && mnt[0] == '/') {
+      base_dirs_.emplace_back(mnt, dir);
+      return true;
+    }
   }
   return false;
 }
@@ -2465,7 +2823,7 @@ inline void Server::stop() {
 }
 
 inline bool Server::parse_request_line(const char *s, Request &req) {
-  static std::regex re(
+  const static std::regex re(
       "(GET|HEAD|POST|PUT|DELETE|CONNECT|OPTIONS|TRACE|PATCH|PRI) "
       "(([^?]+)(?:\\?(.*?))?) (HTTP/1\\.[01])\r\n");
 
@@ -2643,62 +3001,106 @@ Server::write_content_with_provider(Stream &strm, const Request &req,
 
 inline bool Server::read_content(Stream &strm, bool last_connection,
                                  Request &req, Response &res) {
-  if (!detail::read_content(strm, req, payload_max_length_, res.status,
-                            Progress(), [&](const char *buf, size_t n) {
-                              if (req.body.size() + n > req.body.max_size()) {
-                                return false;
-                              }
-                              req.body.append(buf, n);
-                              return true;
-                            })) {
-    return write_response(strm, last_connection, req, res);
-  }
+  MultipartFormDataMap::iterator cur;
+  auto ret = read_content_core(
+      strm, last_connection, req, res,
+      // Regular
+      [&](const char *buf, size_t n) {
+        if (req.body.size() + n > req.body.max_size()) { return false; }
+        req.body.append(buf, n);
+        return true;
+      },
+      // Multipart
+      [&](const MultipartFormData &file) {
+        cur = req.files.emplace(file.name, file);
+        return true;
+      },
+      [&](const char *buf, size_t n) {
+        auto &content = cur->second.content;
+        if (content.size() + n > content.max_size()) { return false; }
+        content.append(buf, n);
+        return true;
+      });
 
   const auto &content_type = req.get_header_value("Content-Type");
-
   if (!content_type.find("application/x-www-form-urlencoded")) {
     detail::parse_query_text(req.body, req.params);
-  } else if (!content_type.find("multipart/form-data")) {
+  }
+
+  return ret;
+}
+
+inline bool Server::read_content_with_content_receiver(
+    Stream &strm, bool last_connection, Request &req, Response &res,
+    ContentReceiver receiver, MultipartContentHeader multipart_header,
+    ContentReceiver multipart_receiver) {
+  return read_content_core(strm, last_connection, req, res, receiver,
+                           multipart_header, multipart_receiver);
+}
+
+inline bool Server::read_content_core(Stream &strm, bool last_connection,
+                                      Request &req, Response &res,
+                                      ContentReceiver receiver,
+                                      MultipartContentHeader mulitpart_header,
+                                      ContentReceiver multipart_receiver) {
+  detail::MultipartFormDataParser multipart_form_data_parser;
+  ContentReceiver out;
+
+  if (req.is_multipart_form_data()) {
+    const auto &content_type = req.get_header_value("Content-Type");
     std::string boundary;
-    if (!detail::parse_multipart_boundary(content_type, boundary) ||
-        !detail::parse_multipart_formdata(boundary, req.body, req.files)) {
+    if (!detail::parse_multipart_boundary(content_type, boundary)) {
       res.status = 400;
       return write_response(strm, last_connection, req, res);
     }
-  }
 
-  return true;
-}
+    multipart_form_data_parser.set_boundary(boundary);
+    out = [&](const char *buf, size_t n) {
+      return multipart_form_data_parser.parse(buf, n, multipart_receiver,
+                                              mulitpart_header);
+    };
+  } else {
+    out = receiver;
+  }
 
-inline bool
-Server::read_content_with_content_receiver(Stream &strm, bool last_connection,
-                                           Request &req, Response &res,
-                                           ContentReceiver receiver) {
-  if (!detail::read_content(
-          strm, req, payload_max_length_, res.status, Progress(),
-          [&](const char *buf, size_t n) { return receiver(buf, n); })) {
+  if (!detail::read_content(strm, req, payload_max_length_, res.status,
+                            Progress(), out)) {
     return write_response(strm, last_connection, req, res);
   }
 
+  if (req.is_multipart_form_data()) {
+    if (!multipart_form_data_parser.is_valid()) {
+      res.status = 400;
+      return write_response(strm, last_connection, req, res);
+    }
+  }
+
   return true;
 }
 
 inline bool Server::handle_file_request(Request &req, Response &res) {
-  if (!base_dir_.empty() && detail::is_valid_path(req.path)) {
-    std::string path = base_dir_ + req.path;
-
-    if (!path.empty() && path.back() == '/') { path += "index.html"; }
-
-    if (detail::is_file(path)) {
-      detail::read_file(path, res.body);
-      auto type = detail::find_content_type(path);
-      if (type) { res.set_header("Content-Type", type); }
-      res.status = 200;
-      if (file_request_handler_) { file_request_handler_(req, res); }
-      return true;
+  for (const auto &kv : base_dirs_) {
+    const auto &mount_point = kv.first;
+    const auto &base_dir = kv.second;
+
+    // Prefix match
+    if (!req.path.find(mount_point)) {
+      std::string sub_path = "/" + req.path.substr(mount_point.size());
+      if (detail::is_valid_path(sub_path)) {
+        auto path = base_dir + sub_path;
+        if (path.back() == '/') { path += "index.html"; }
+
+        if (detail::is_file(path)) {
+          detail::read_file(path, res.body);
+          auto type = detail::find_content_type(path);
+          if (type) { res.set_header("Content-Type", type); }
+          res.status = 200;
+          if (file_request_handler_) { file_request_handler_(req, res); }
+          return true;
+        }
+      }
     }
   }
-
   return false;
 }
 
@@ -2734,7 +3136,8 @@ inline int Server::bind_internal(const char *host, int port, int socket_flags) {
     if (address.ss_family == AF_INET) {
       return ntohs(reinterpret_cast<struct sockaddr_in *>(&address)->sin_port);
     } else if (address.ss_family == AF_INET6) {
-      return ntohs(reinterpret_cast<struct sockaddr_in6 *>(&address)->sin6_port);
+      return ntohs(
+          reinterpret_cast<struct sockaddr_in6 *>(&address)->sin6_port);
     } else {
       return -1;
     }
@@ -2790,39 +3193,44 @@ inline bool Server::listen_internal() {
   return ret;
 }
 
-inline bool Server::routing(Request &req, Response &res, Stream &strm, bool last_connection) {
+inline bool Server::routing(Request &req, Response &res, Stream &strm,
+                            bool last_connection) {
   // File handler
   if (req.method == "GET" && handle_file_request(req, res)) { return true; }
 
-  // Content reader handler
-  if (req.method == "POST" || req.method == "PUT" || req.method == "PATCH") {
-    ContentReader content_reader = [&](ContentReceiver receiver) {
-      return read_content_with_content_receiver(strm, last_connection, req, res, receiver);
-    };
+  if (detail::expect_content(req)) {
+    // Content reader handler
+    {
+      ContentReader reader(
+          [&](ContentReceiver receiver) {
+            return read_content_with_content_receiver(
+                strm, last_connection, req, res, receiver, nullptr, nullptr);
+          },
+          [&](MultipartContentHeader header, ContentReceiver receiver) {
+            return read_content_with_content_receiver(
+                strm, last_connection, req, res, nullptr, header, receiver);
+          });
 
-    if (req.method == "POST") {
-      if (dispatch_request_for_content_reader(req, res, content_reader,
-                                              post_handlers_for_content_reader)) {
-        return true;
-      }
-    } else if (req.method == "PUT") {
-      if (dispatch_request_for_content_reader(req, res, content_reader,
-                                              put_handlers_for_content_reader)) {
-        return true;
-      }
-    } else if (req.method == "PATCH") {
-      if (dispatch_request_for_content_reader(
-              req, res, content_reader, patch_handlers_for_content_reader)) {
-        return true;
+      if (req.method == "POST") {
+        if (dispatch_request_for_content_reader(
+                req, res, reader, post_handlers_for_content_reader_)) {
+          return true;
+        }
+      } else if (req.method == "PUT") {
+        if (dispatch_request_for_content_reader(
+                req, res, reader, put_handlers_for_content_reader_)) {
+          return true;
+        }
+      } else if (req.method == "PATCH") {
+        if (dispatch_request_for_content_reader(
+                req, res, reader, patch_handlers_for_content_reader_)) {
+          return true;
+        }
       }
     }
-  }
 
-  // Read content into `req.body`
-  if (req.method == "POST" || req.method == "PUT" || req.method == "PATCH" || req.method == "PRI") {
-    if (!read_content(strm, last_connection, req, res)) {
-      return false;
-    }
+    // Read content into `req.body`
+    if (!read_content(strm, last_connection, req, res)) { return false; }
   }
 
   // Regular handler
@@ -2877,7 +3285,7 @@ Server::dispatch_request_for_content_reader(Request &req, Response &res,
 inline bool
 Server::process_request(Stream &strm, bool last_connection,
                         bool &connection_close,
-                        const std::function<void(Request &)>& setup_request) {
+                        const std::function<void(Request &)> &setup_request) {
   std::array<char, 2048> buf{};
 
   detail::stream_line_reader line_reader(strm, buf.data(), buf.size());
@@ -2953,29 +3361,15 @@ inline Client::Client(const char *host, int port, time_t timeout_sec)
       keep_alive_max_count_(CPPHTTPLIB_KEEPALIVE_MAX_COUNT),
       read_timeout_sec_(CPPHTTPLIB_READ_TIMEOUT_SECOND),
       read_timeout_usec_(CPPHTTPLIB_READ_TIMEOUT_USECOND),
-      follow_location_(false) {}
+      follow_location_(false), compress_(false) {}
 
 inline Client::~Client() {}
 
 inline bool Client::is_valid() const { return true; }
 
 inline socket_t Client::create_client_socket() const {
-  return detail::create_socket(
-      host_.c_str(), port_, [=](socket_t sock, struct addrinfo &ai) -> bool {
-        detail::set_nonblocking(sock, true);
-
-        auto ret = connect(sock, ai.ai_addr, static_cast<int>(ai.ai_addrlen));
-        if (ret < 0) {
-          if (detail::is_connection_error() ||
-              !detail::wait_until_socket_is_ready(sock, timeout_sec_, 0)) {
-            detail::close_socket(sock);
-            return false;
-          }
-        }
-
-        detail::set_nonblocking(sock, false);
-        return true;
-      });
+  return detail::create_client_socket(host_.c_str(), port_, timeout_sec_,
+                                      interface_);
 }
 
 inline bool Client::read_response_line(Stream &strm, Response &res) {
@@ -3012,6 +3406,43 @@ inline bool Client::send(const Request &req, Response &res) {
     ret = redirect(req, res);
   }
 
+  if (ret && !username_.empty() && !password_.empty() && res.status == 401) {
+    int type;
+    std::map<std::string, std::string> digest_auth;
+
+    if ((type = parse_www_authenticate(res, digest_auth)) > 0) {
+      std::pair<std::string, std::string> header;
+
+      if (type == 1) {
+        header = make_basic_authentication_header(username_, password_);
+      } else if (type == 2) {
+#ifdef CPPHTTPLIB_OPENSSL_SUPPORT
+        size_t cnonce_count = 1;
+        auto cnonce = random_string(10);
+
+        header = make_digest_authentication_header(
+            req, digest_auth, cnonce_count, cnonce, username_, password_);
+#endif
+      }
+
+      Request new_req;
+      new_req.method = req.method;
+      new_req.path = req.path;
+      new_req.headers = req.headers;
+      new_req.body = req.body;
+      new_req.response_handler = req.response_handler;
+      new_req.content_receiver = req.content_receiver;
+      new_req.progress = req.progress;
+
+      new_req.headers.insert(header);
+
+      Response new_res;
+      auto ret = send(new_req, new_res);
+      if (ret) { res = new_res; }
+      return ret;
+    }
+  }
+
   return ret;
 }
 
@@ -3056,46 +3487,51 @@ inline bool Client::redirect(const Request &req, Response &res) {
   auto location = res.get_header_value("location");
   if (location.empty()) { return false; }
 
-  std::regex re(
+  const static std::regex re(
       R"(^(?:([^:/?#]+):)?(?://([^/?#]*))?([^?#]*(?:\?[^#]*)?)(?:#.*)?)");
 
+  std::smatch m;
+  if (!regex_match(location, m, re)) { return false; }
+
+  auto next_scheme = m[1].str();
+  auto next_host = m[2].str();
+  auto next_path = m[3].str();
+  if (next_host.empty()) { next_host = host_; }
+  if (next_path.empty()) { next_path = "/"; }
+
   auto scheme = is_ssl() ? "https" : "http";
 
-  std::smatch m;
-  if (regex_match(location, m, re)) {
-    auto next_scheme = m[1].str();
-    auto next_host = m[2].str();
-    auto next_path = m[3].str();
-    if (next_host.empty()) { next_host = host_; }
-    if (next_path.empty()) { next_path = "/"; }
-
-    if (next_scheme == scheme && next_host == host_) {
-      return detail::redirect(*this, req, res, next_path);
-    } else {
-      if (next_scheme == "https") {
+  if (next_scheme == scheme && next_host == host_) {
+    return detail::redirect(*this, req, res, next_path);
+  } else {
+    if (next_scheme == "https") {
 #ifdef CPPHTTPLIB_OPENSSL_SUPPORT
-        SSLClient cli(next_host.c_str());
-        cli.follow_location(true);
-        return detail::redirect(cli, req, res, next_path);
+      SSLClient cli(next_host.c_str());
+      cli.set_follow_location(true);
+      return detail::redirect(cli, req, res, next_path);
 #else
-        return false;
+      return false;
 #endif
-      } else {
-        Client cli(next_host.c_str());
-        cli.follow_location(true);
-        return detail::redirect(cli, req, res, next_path);
-      }
+    } else {
+      Client cli(next_host.c_str());
+      cli.set_follow_location(true);
+      return detail::redirect(cli, req, res, next_path);
     }
   }
-  return false;
 }
 
-inline void Client::write_request(Stream &strm, const Request &req,
+inline bool Client::write_request(Stream &strm, const Request &req,
                                   bool last_connection) {
   BufferStream bstrm;
 
   // Request line
-  auto path = detail::encode_url(req.path);
+  const static std::regex re(
+      R"(^([^:/?#]+://[^/?#]*)?([^?#]*(?:\?[^#]*)?(?:#.*)?))");
+
+  std::smatch m;
+  if (!regex_match(req.path, m, re)) { return false; }
+
+  auto path = m[1].str() + detail::encode_url(m[2].str());
 
   bstrm.write_format("%s %s HTTP/1.1\r\n", req.method.c_str(), path.c_str());
 
@@ -3165,16 +3601,14 @@ inline void Client::write_request(Stream &strm, const Request &req,
   } else {
     strm.write(req.body);
   }
+
+  return true;
 }
 
 inline std::shared_ptr<Response> Client::send_with_content_provider(
     const char *method, const char *path, const Headers &headers,
     const std::string &body, size_t content_length,
-    ContentProvider content_provider, const char *content_type, bool compress) {
-#ifndef CPPHTTPLIB_ZLIB_SUPPORT
-  (void)compress;
-#endif
-
+    ContentProvider content_provider, const char *content_type) {
   Request req;
   req.method = method;
   req.headers = headers;
@@ -3183,7 +3617,7 @@ inline std::shared_ptr<Response> Client::send_with_content_provider(
   req.headers.emplace("Content-Type", content_type);
 
 #ifdef CPPHTTPLIB_ZLIB_SUPPORT
-  if (compress) {
+  if (compress_) {
     if (content_provider) {
       size_t offset = 0;
       while (offset < content_length) {
@@ -3219,7 +3653,7 @@ inline bool Client::process_request(Stream &strm, const Request &req,
                                     Response &res, bool last_connection,
                                     bool &connection_close) {
   // Send request
-  write_request(strm, req, last_connection);
+  if (!write_request(strm, req, last_connection)) { return false; }
 
   // Receive response and headers
   if (!read_response_line(strm, res) ||
@@ -3332,7 +3766,8 @@ inline std::shared_ptr<Response> Client::Get(const char *path,
                                              ResponseHandler response_handler,
                                              ContentReceiver content_receiver) {
   Progress dummy;
-  return Get(path, headers, std::move(response_handler), content_receiver, dummy);
+  return Get(path, headers, std::move(response_handler), content_receiver,
+             dummy);
 }
 
 inline std::shared_ptr<Response> Client::Get(const char *path,
@@ -3370,45 +3805,40 @@ inline std::shared_ptr<Response> Client::Head(const char *path,
 
 inline std::shared_ptr<Response> Client::Post(const char *path,
                                               const std::string &body,
-                                              const char *content_type,
-                                              bool compress) {
-  return Post(path, Headers(), body, content_type, compress);
+                                              const char *content_type) {
+  return Post(path, Headers(), body, content_type);
 }
 
-inline std::shared_ptr<Response>
-Client::Post(const char *path, const Headers &headers, const std::string &body,
-             const char *content_type, bool compress) {
+inline std::shared_ptr<Response> Client::Post(const char *path,
+                                              const Headers &headers,
+                                              const std::string &body,
+                                              const char *content_type) {
   return send_with_content_provider("POST", path, headers, body, 0, nullptr,
-                                    content_type, compress);
+                                    content_type);
 }
 
-inline std::shared_ptr<Response>
-Client::Post(const char *path, const Params &params, bool compress) {
-  return Post(path, Headers(), params, compress);
+inline std::shared_ptr<Response> Client::Post(const char *path,
+                                              const Params &params) {
+  return Post(path, Headers(), params);
 }
 
 inline std::shared_ptr<Response> Client::Post(const char *path,
                                               size_t content_length,
                                               ContentProvider content_provider,
-                                              const char *content_type,
-                                              bool compress) {
-  return Post(path, Headers(), content_length, content_provider, content_type,
-              compress);
+                                              const char *content_type) {
+  return Post(path, Headers(), content_length, content_provider, content_type);
 }
 
 inline std::shared_ptr<Response>
 Client::Post(const char *path, const Headers &headers, size_t content_length,
-             ContentProvider content_provider, const char *content_type,
-             bool compress) {
+             ContentProvider content_provider, const char *content_type) {
   return send_with_content_provider("POST", path, headers, std::string(),
                                     content_length, content_provider,
-                                    content_type, compress);
+                                    content_type);
 }
 
-inline std::shared_ptr<Response> Client::Post(const char *path,
-                                              const Headers &headers,
-                                              const Params &params,
-                                              bool compress) {
+inline std::shared_ptr<Response>
+Client::Post(const char *path, const Headers &headers, const Params &params) {
   std::string query;
   for (auto it = params.begin(); it != params.end(); ++it) {
     if (it != params.begin()) { query += "&"; }
@@ -3417,19 +3847,17 @@ inline std::shared_ptr<Response> Client::Post(const char *path,
     query += detail::encode_url(it->second);
   }
 
-  return Post(path, headers, query, "application/x-www-form-urlencoded",
-              compress);
+  return Post(path, headers, query, "application/x-www-form-urlencoded");
 }
 
 inline std::shared_ptr<Response>
-Client::Post(const char *path, const MultipartFormDataItems &items,
-             bool compress) {
-  return Post(path, Headers(), items, compress);
+Client::Post(const char *path, const MultipartFormDataItems &items) {
+  return Post(path, Headers(), items);
 }
 
 inline std::shared_ptr<Response>
 Client::Post(const char *path, const Headers &headers,
-             const MultipartFormDataItems &items, bool compress) {
+             const MultipartFormDataItems &items) {
   auto boundary = detail::make_multipart_data_boundary();
 
   std::string body;
@@ -3451,71 +3879,65 @@ Client::Post(const char *path, const Headers &headers,
   body += "--" + boundary + "--\r\n";
 
   std::string content_type = "multipart/form-data; boundary=" + boundary;
-  return Post(path, headers, body, content_type.c_str(), compress);
+  return Post(path, headers, body, content_type.c_str());
 }
 
 inline std::shared_ptr<Response> Client::Put(const char *path,
                                              const std::string &body,
-                                             const char *content_type,
-                                             bool compress) {
-  return Put(path, Headers(), body, content_type, compress);
+                                             const char *content_type) {
+  return Put(path, Headers(), body, content_type);
 }
 
-inline std::shared_ptr<Response>
-Client::Put(const char *path, const Headers &headers, const std::string &body,
-            const char *content_type, bool compress) {
+inline std::shared_ptr<Response> Client::Put(const char *path,
+                                             const Headers &headers,
+                                             const std::string &body,
+                                             const char *content_type) {
   return send_with_content_provider("PUT", path, headers, body, 0, nullptr,
-                                    content_type, compress);
+                                    content_type);
 }
 
 inline std::shared_ptr<Response> Client::Put(const char *path,
                                              size_t content_length,
                                              ContentProvider content_provider,
-                                             const char *content_type,
-                                             bool compress) {
-  return Put(path, Headers(), content_length, content_provider, content_type,
-             compress);
+                                             const char *content_type) {
+  return Put(path, Headers(), content_length, content_provider, content_type);
 }
 
 inline std::shared_ptr<Response>
 Client::Put(const char *path, const Headers &headers, size_t content_length,
-            ContentProvider content_provider, const char *content_type,
-            bool compress) {
+            ContentProvider content_provider, const char *content_type) {
   return send_with_content_provider("PUT", path, headers, std::string(),
                                     content_length, content_provider,
-                                    content_type, compress);
+                                    content_type);
 }
 
 inline std::shared_ptr<Response> Client::Patch(const char *path,
                                                const std::string &body,
-                                               const char *content_type,
-                                               bool compress) {
-  return Patch(path, Headers(), body, content_type, compress);
+                                               const char *content_type) {
+  return Patch(path, Headers(), body, content_type);
 }
 
-inline std::shared_ptr<Response>
-Client::Patch(const char *path, const Headers &headers, const std::string &body,
-              const char *content_type, bool compress) {
+inline std::shared_ptr<Response> Client::Patch(const char *path,
+                                               const Headers &headers,
+                                               const std::string &body,
+                                               const char *content_type) {
   return send_with_content_provider("PATCH", path, headers, body, 0, nullptr,
-                                    content_type, compress);
+                                    content_type);
 }
 
 inline std::shared_ptr<Response> Client::Patch(const char *path,
                                                size_t content_length,
                                                ContentProvider content_provider,
-                                               const char *content_type,
-                                               bool compress) {
-  return Patch(path, Headers(), content_length, content_provider, content_type,
-               compress);
+                                               const char *content_type) {
+  return Patch(path, Headers(), content_length, content_provider, content_type);
 }
 
 inline std::shared_ptr<Response>
 Client::Patch(const char *path, const Headers &headers, size_t content_length,
-              ContentProvider content_provider, const char *content_type,
-              bool compress) {
+              ContentProvider content_provider, const char *content_type) {
   return send_with_content_provider("PATCH", path, headers, std::string(),
                                     content_length, content_provider,
-                                    content_type, compress);
+                                    content_type);
 }
 
 inline std::shared_ptr<Response> Client::Delete(const char *path) {
@@ -3575,7 +3997,16 @@ inline void Client::set_read_timeout(time_t sec, time_t usec) {
   read_timeout_usec_ = usec;
 }
 
-inline void Client::follow_location(bool on) { follow_location_ = on; }
+inline void Client::set_auth(const char *username, const char *password) {
+  username_ = username;
+  password_ = password;
+}
+
+inline void Client::set_follow_location(bool on) { follow_location_ = on; }
+
+inline void Client::set_compress(bool on) { compress_ = on; }
+
+inline void Client::set_interface(const char *intf) { interface_ = intf; }
 
 /*
  * SSL Implementation
@@ -4021,6 +4452,8 @@ inline bool SSLClient::check_host_name(const char *pattern,
 }
 #endif
 
+// ----------------------------------------------------------------------------
+
 } // namespace httplib
 
 #endif // CPPHTTPLIB_HTTPLIB_H