Properly report errors when setting the URI fails

src/rsfilesink.rs

@@ -62,24 +62,24 @@ impl FileSink {
 }
 
 impl Sink for FileSink {
-    fn set_uri(&self, uri: Option<Url>) -> bool {
+    fn set_uri(&self, uri: Option<Url>) -> Result<(), (UriError, String)> {
         let location = &mut self.settings.lock().unwrap().location;
 
         match uri {
             None => {
                 *location = None;
-                true
+                Ok(())
             }
             Some(ref uri) => {
                 match uri.to_file_path().ok() {
                     Some(p) => {
                         *location = Some(p);
-                        true
+                        Ok(())
                     }
                     None => {
                         *location = None;
-                        println_err!("Unsupported file URI '{}'", uri.as_str());
-                        false
+                        Err((UriError::UnsupportedProtocol,
+                             format!("Unsupported file URI '{}'", uri.as_str())))
                     }
                 }
             }

src/rsfilesrc.rs

@@ -63,24 +63,24 @@ impl FileSrc {
 }
 
 impl Source for FileSrc {
-    fn set_uri(&self, uri: Option<Url>) -> bool {
+    fn set_uri(&self, uri: Option<Url>) -> Result<(), (UriError, String)> {
         let location = &mut self.settings.lock().unwrap().location;
 
         match uri {
             None => {
                 *location = None;
-                true
+                Ok(())
             }
             Some(ref uri) => {
                 match uri.to_file_path().ok() {
                     Some(p) => {
                         *location = Some(p);
-                        true
+                        Ok(())
                     }
                     None => {
                         *location = None;
-                        println_err!("Unsupported file URI '{}'", uri.as_str());
-                        false
+                        Err((UriError::UnsupportedProtocol,
+                             format!("Unsupported file URI '{}'", uri.as_str())))
                     }
                 }
             }

src/rshttpsrc.rs

@@ -141,22 +141,22 @@ impl HttpSrc {
 }
 
 impl Source for HttpSrc {
-    fn set_uri(&self, uri: Option<Url>) -> bool {
+    fn set_uri(&self, uri: Option<Url>) -> Result<(), (UriError, String)> {
         let url = &mut self.settings.lock().unwrap().url;
 
         match uri {
             None => {
                 *url = None;
-                true
+                Ok(())
             }
             Some(uri) => {
                 if uri.scheme() == "http" || uri.scheme() == "https" {
                     *url = Some(uri);
-                    true
+                    Ok(())
                 } else {
                     *url = None;
-                    println_err!("Unsupported URI '{}'", uri.as_str());
-                    false
+                    Err((UriError::UnsupportedProtocol,
+                         format!("Unsupported URI '{}'", uri.as_str())))
                 }
             }
         }

src/rssink.c

@@ -38,7 +38,7 @@ static GHashTable *sinks;
 extern gboolean sinks_register (void *plugin);
 extern void *sink_new (GstRsSink * sink, void *create_instance);
 extern GstFlowReturn sink_render (void *rssink, void *data, size_t data_len);
-extern gboolean sink_set_uri (void *rssink, const char *uri);
+extern gboolean sink_set_uri (void *rssink, const char *uri, GError ** err);
 extern char *sink_get_uri (void *rssink);
 extern gboolean sink_start (void *rssink);
 extern gboolean sink_stop (void *rssink);
@@ -140,7 +140,7 @@ gst_rs_sink_set_property (GObject * object, guint prop_id,
 
   switch (prop_id) {
     case PROP_URI:
-      sink_set_uri (sink->instance, g_value_get_string (value));
+      sink_set_uri (sink->instance, g_value_get_string (value), NULL);
       break;
     default:
       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
@@ -229,11 +229,8 @@ gst_rs_sink_uri_set_uri (GstURIHandler * handler, const gchar * uri,
 {
   GstRsSink *sink = GST_RS_SINK (handler);
 
-  if (!sink_set_uri (sink->instance, uri)) {
-    g_set_error (err, GST_URI_ERROR, GST_URI_ERROR_BAD_URI,
-        "Can't handle URI '%s'", uri);
+  if (!sink_set_uri (sink->instance, uri, err))
     return FALSE;
-  }
 
   return TRUE;
 }

src/rssink.rs

@@ -21,7 +21,6 @@ use std::os::raw::c_void;
 use std::ffi::{CStr, CString};
 use std::slice;
 use std::ptr;
-use std::io::Write;
 
 use url::Url;
 
@@ -40,7 +39,7 @@ impl SinkController {
 
 pub trait Sink: Sync + Send {
     // Called from any thread at any time
-    fn set_uri(&self, uri: Option<Url>) -> bool;
+    fn set_uri(&self, uri: Option<Url>) -> Result<(), (UriError, String)>;
     fn get_uri(&self) -> Option<Url>;
 
     // Called from the streaming thread only
@@ -62,19 +61,37 @@ pub unsafe extern "C" fn sink_drop(ptr: *mut Box<Sink>) {
 }
 
 #[no_mangle]
-pub unsafe extern "C" fn sink_set_uri(ptr: *mut Box<Sink>, uri_ptr: *const c_char) -> GBoolean {
+pub unsafe extern "C" fn sink_set_uri(ptr: *mut Box<Sink>,
+                                      uri_ptr: *const c_char,
+                                      cerr: *mut c_void)
+                                      -> GBoolean {
     let sink: &mut Box<Sink> = &mut *ptr;
 
     if uri_ptr.is_null() {
-        GBoolean::from_bool(sink.set_uri(None))
+        if let Err((code, msg)) = sink.set_uri(None) {
+            code.into_gerror(cerr, Some(&msg));
+            GBoolean::False
+        } else {
+            GBoolean::True
+        }
     } else {
         let uri_str = CStr::from_ptr(uri_ptr).to_str().unwrap();
 
         match Url::parse(uri_str) {
-            Ok(uri) => GBoolean::from_bool(sink.set_uri(Some(uri))),
+            Ok(uri) => {
+                if let Err((code, msg)) = sink.set_uri(Some(uri)) {
+                    code.into_gerror(cerr, Some(&msg));
+                    GBoolean::False
+                } else {
+                    GBoolean::True
+                }
+            }
             Err(err) => {
-                sink.set_uri(None);
-                println_err!("Failed to parse URI '{}': {}", uri_str, err);
+                let _ = sink.set_uri(None);
+                UriError::BadUri.into_gerror(cerr,
+                                             Some(&format!("Failed to parse URI '{}': {}",
+                                                           uri_str,
+                                                           err)));
                 GBoolean::False
             }
         }

src/rssource.c

@@ -39,7 +39,7 @@ extern void source_drop (void *rssource);
 extern GstFlowReturn source_fill (void *rssource,
     uint64_t offset, void *data, size_t * data_len);
 extern gboolean source_do_seek (void *rssource, uint64_t start, uint64_t stop);
-extern gboolean source_set_uri (void *rssource, const char *uri);
+extern gboolean source_set_uri (void *rssource, const char *uri, GError ** err);
 extern char *source_get_uri (void *rssource);
 extern uint64_t source_get_size (void *rssource);
 extern gboolean source_is_seekable (void *rssource);
@@ -149,7 +149,7 @@ gst_rs_src_set_property (GObject * object, guint prop_id,
 
   switch (prop_id) {
     case PROP_URI:
-      source_set_uri (src->instance, g_value_get_string (value));
+      source_set_uri (src->instance, g_value_get_string (value), NULL);
       break;
     default:
       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
@@ -274,11 +274,8 @@ gst_rs_src_uri_set_uri (GstURIHandler * handler, const gchar * uri,
 {
   GstRsSrc *src = GST_RS_SRC (handler);
 
-  if (!source_set_uri (src->instance, uri)) {
-    g_set_error (err, GST_URI_ERROR, GST_URI_ERROR_BAD_URI,
-        "Can't handle URI '%s'", uri);
+  if (!source_set_uri (src->instance, uri, err))
     return FALSE;
-  }
 
   return TRUE;
 }

src/rssource.rs

@@ -20,7 +20,6 @@ use std::os::raw::c_void;
 use std::ffi::{CStr, CString};
 use std::slice;
 use std::ptr;
-use std::io::Write;
 
 use url::Url;
 
@@ -39,7 +38,7 @@ impl SourceController {
 
 pub trait Source: Sync + Send {
     // Called from any thread at any time
-    fn set_uri(&self, uri: Option<Url>) -> bool;
+    fn set_uri(&self, uri: Option<Url>) -> Result<(), (UriError, String)>;
     fn get_uri(&self) -> Option<Url>;
 
     // Called from any thread between start/stop
@@ -66,19 +65,37 @@ pub unsafe extern "C" fn source_drop(ptr: *mut Box<Source>) {
 }
 
 #[no_mangle]
-pub unsafe extern "C" fn source_set_uri(ptr: *mut Box<Source>, uri_ptr: *const c_char) -> GBoolean {
+pub unsafe extern "C" fn source_set_uri(ptr: *mut Box<Source>,
+                                        uri_ptr: *const c_char,
+                                        cerr: *mut c_void)
+                                        -> GBoolean {
     let source: &mut Box<Source> = &mut *ptr;
 
     if uri_ptr.is_null() {
-        GBoolean::from_bool(source.set_uri(None))
+        if let Err((code, msg)) = source.set_uri(None) {
+            code.into_gerror(cerr, Some(&msg));
+            GBoolean::False
+        } else {
+            GBoolean::True
+        }
     } else {
         let uri_str = CStr::from_ptr(uri_ptr).to_str().unwrap();
 
         match Url::parse(uri_str) {
-            Ok(uri) => GBoolean::from_bool(source.set_uri(Some(uri))),
+            Ok(uri) => {
+                if let Err((code, msg)) = source.set_uri(Some(uri)) {
+                    code.into_gerror(cerr, Some(&msg));
+                    GBoolean::False
+                } else {
+                    GBoolean::True
+                }
+            }
             Err(err) => {
-                source.set_uri(None);
-                println_err!("Failed to parse URI '{}': {}", uri_str, err);
+                let _ = source.set_uri(None);
+                UriError::BadUri.into_gerror(cerr,
+                                             Some(&format!("Failed to parse URI '{}': {}",
+                                                           uri_str,
+                                                           err)));
                 GBoolean::False
             }
         }

src/utils.rs

@@ -17,7 +17,9 @@
 //
 //
 use libc::c_char;
+use std::os::raw::c_void;
 use std::ffi::CString;
+use std::ptr;
 
 #[macro_export]
 macro_rules! println_err(
@@ -54,3 +56,27 @@ impl GBoolean {
 pub unsafe extern "C" fn cstring_drop(ptr: *mut c_char) {
     CString::from_raw(ptr);
 }
+
+#[repr(C)]
+pub enum UriError {
+    UnsupportedProtocol = 0,
+    BadUri,
+    BadState,
+    BadReference,
+}
+
+extern "C" {
+    fn g_set_error_literal(err: *mut c_void, domain: u32, code: i32, message: *const c_char);
+    fn gst_uri_error_quark() -> u32;
+}
+
+impl UriError {
+    pub unsafe fn into_gerror(self, err: *mut c_void, message: Option<&String>) {
+        if let Some(msg) = message {
+            let cmsg = CString::new(msg.as_str()).unwrap();
+            g_set_error_literal(err, gst_uri_error_quark(), self as i32, cmsg.as_ptr());
+        } else {
+            g_set_error_literal(err, gst_uri_error_quark(), self as i32, ptr::null());
+        }
+    }
+}