diff --git a/src/input/AsyncInputStream.cxx b/src/input/AsyncInputStream.cxx
index 599aaf799..f871be26f 100644
--- a/src/input/AsyncInputStream.cxx
+++ b/src/input/AsyncInputStream.cxx
@@ -12,7 +12,7 @@
 
 #include <string.h>
 
-AsyncInputStream::AsyncInputStream(EventLoop &event_loop, const char *_url,
+AsyncInputStream::AsyncInputStream(EventLoop &event_loop, std::string_view _url,
 				   Mutex &_mutex,
 				   size_t _buffer_size,
 				   size_t _resume_at) noexcept
diff --git a/src/input/AsyncInputStream.hxx b/src/input/AsyncInputStream.hxx
index 0a1f342b1..aba4936fc 100644
--- a/src/input/AsyncInputStream.hxx
+++ b/src/input/AsyncInputStream.hxx
@@ -1,8 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
 // Copyright The Music Player Daemon Project
 
-#ifndef MPD_ASYNC_INPUT_STREAM_HXX
-#define MPD_ASYNC_INPUT_STREAM_HXX
+#pragma once
 
 #include "InputStream.hxx"
 #include "event/InjectEvent.hxx"
@@ -54,7 +53,7 @@ protected:
 	std::exception_ptr postponed_exception;
 
 public:
-	AsyncInputStream(EventLoop &event_loop, const char *_url,
+	AsyncInputStream(EventLoop &event_loop, std::string_view _url,
 			 Mutex &_mutex,
 			 size_t _buffer_size,
 			 size_t _resume_at) noexcept;
@@ -155,5 +154,3 @@ private:
 	void DeferredResume() noexcept;
 	void DeferredSeek() noexcept;
 };
-
-#endif
diff --git a/src/input/plugins/CurlInputPlugin.cxx b/src/input/plugins/CurlInputPlugin.cxx
index d8584f896..30e226aee 100644
--- a/src/input/plugins/CurlInputPlugin.cxx
+++ b/src/input/plugins/CurlInputPlugin.cxx
@@ -66,7 +66,7 @@ class CurlInputStream final : public AsyncInputStream, CurlResponseHandler {
 
 public:
 	template<typename I>
-	CurlInputStream(EventLoop &event_loop, const char *_url,
+	CurlInputStream(EventLoop &event_loop, std::string_view _url,
 			const Curl::Headers &headers,
 			I &&_icy,
 			Mutex &_mutex);
@@ -76,7 +76,7 @@ public:
 	CurlInputStream(const CurlInputStream &) = delete;
 	CurlInputStream &operator=(const CurlInputStream &) = delete;
 
-	static InputStreamPtr Open(const char *url,
+	static InputStreamPtr Open(std::string_view url,
 				   const Curl::Headers &headers,
 				   Mutex &mutex);
 
@@ -435,7 +435,7 @@ input_curl_finish() noexcept
 
 template<typename I>
 inline
-CurlInputStream::CurlInputStream(EventLoop &event_loop, const char *_url,
+CurlInputStream::CurlInputStream(EventLoop &event_loop, std::string_view _url,
 				 const Curl::Headers &headers,
 				 I &&_icy,
 				 Mutex &_mutex)
@@ -568,7 +568,7 @@ CurlInputStream::DoSeek(offset_type new_offset)
 }
 
 inline InputStreamPtr
-CurlInputStream::Open(const char *url,
+CurlInputStream::Open(std::string_view url,
 		      const Curl::Headers &headers,
 		      Mutex &mutex)
 {
@@ -588,7 +588,7 @@ CurlInputStream::Open(const char *url,
 }
 
 InputStreamPtr
-OpenCurlInputStream(const char *uri, const Curl::Headers &headers,
+OpenCurlInputStream(std::string_view uri, const Curl::Headers &headers,
 		    Mutex &mutex)
 {
 	return CurlInputStream::Open(uri, headers, mutex);
diff --git a/src/input/plugins/CurlInputPlugin.hxx b/src/input/plugins/CurlInputPlugin.hxx
index d92c17409..c911bc334 100644
--- a/src/input/plugins/CurlInputPlugin.hxx
+++ b/src/input/plugins/CurlInputPlugin.hxx
@@ -1,13 +1,14 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
 // Copyright The Music Player Daemon Project
 
-#ifndef MPD_INPUT_CURL_HXX
-#define MPD_INPUT_CURL_HXX
+#pragma once
 
 #include "lib/curl/Headers.hxx"
 #include "input/Ptr.hxx"
 #include "thread/Mutex.hxx"
 
+#include <string_view>
+
 extern const struct InputPlugin input_plugin_curl;
 
 /**
@@ -18,7 +19,5 @@ extern const struct InputPlugin input_plugin_curl;
  * Throws on error.
  */
 InputStreamPtr
-OpenCurlInputStream(const char *uri, const Curl::Headers &headers,
+OpenCurlInputStream(std::string_view uri, const Curl::Headers &headers,
 		    Mutex &mutex);
-
-#endif
diff --git a/src/input/plugins/NfsInputPlugin.cxx b/src/input/plugins/NfsInputPlugin.cxx
index 7002d7b6f..7ab73dfa1 100644
--- a/src/input/plugins/NfsInputPlugin.cxx
+++ b/src/input/plugins/NfsInputPlugin.cxx
@@ -25,7 +25,7 @@ class NfsInputStream final : NfsFileReader, public AsyncInputStream {
 	bool reconnect_on_resume = false, reconnecting = false;
 
 public:
-	NfsInputStream(const char *_uri, Mutex &_mutex)
+	NfsInputStream(std::string_view _uri, Mutex &_mutex) noexcept
 		:AsyncInputStream(NfsFileReader::GetEventLoop(),
 				  _uri, _mutex,
 				  NFS_MAX_BUFFERED,
diff --git a/src/input/plugins/UringInputPlugin.cxx b/src/input/plugins/UringInputPlugin.cxx
index 6ef9affb0..9e0ecdbad 100644
--- a/src/input/plugins/UringInputPlugin.cxx
+++ b/src/input/plugins/UringInputPlugin.cxx
@@ -45,7 +45,7 @@ class UringInputStream final : public AsyncInputStream, Uring::ReadHandler {
 
 public:
 	UringInputStream(EventLoop &event_loop, Uring::Queue &_uring,
-			 const char *path,
+			 std::string_view path,
 			 UniqueFileDescriptor &&_fd,
 			 offset_type _size, Mutex &_mutex)
 		:AsyncInputStream(event_loop,