initial commit

src/error.rs

@@ -0,0 +1,67 @@
+use failure::{Context, Fail, Backtrace, Error};
+use std::fmt;
+
+#[derive(Debug)]
+pub struct ScraperError {
+    inner: Context<ScraperErrorKind>,
+}
+
+#[derive(Copy, Clone, Eq, PartialEq, Debug, Fail)]
+pub enum ScraperErrorKind {
+    #[fail(display = "libXml Error")]
+    Xml,
+    #[fail(display = "No content found")]
+    Scrape,
+    #[fail(display = "Url Error")]
+    Url,
+    #[fail(display = "Http request failed")]
+    Http,
+    #[fail(display = "Config Error")]
+    Config,
+    #[fail(display = "IO Error")]
+    IO,
+    #[fail(display = "Content-type suggest no html")]
+    ContentType,
+    #[fail(display = "Unknown Error")]
+    Unknown,
+}
+
+impl Fail for ScraperError {
+    fn cause(&self) -> Option<&Fail> {
+        self.inner.cause()
+    }
+
+    fn backtrace(&self) -> Option<&Backtrace> {
+        self.inner.backtrace()
+    }
+}
+
+impl fmt::Display for ScraperError {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        fmt::Display::fmt(&self.inner, f)
+    }
+}
+
+impl ScraperError {
+    pub fn kind(&self) -> ScraperErrorKind {
+        *self.inner.get_context()
+    }
+}
+
+impl From<ScraperErrorKind> for ScraperError {
+    fn from(kind: ScraperErrorKind) -> ScraperError {
+        ScraperError { inner: Context::new(kind) }
+    }
+}
+
+impl From<Context<ScraperErrorKind>> for ScraperError {
+    fn from(inner: Context<ScraperErrorKind>) -> ScraperError {
+        ScraperError { inner: inner }
+    }
+}
+
+impl From<Error> for ScraperError {
+    fn from(_: Error) -> ScraperError {
+        ScraperError { inner: Context::new(ScraperErrorKind::Unknown) }
+    }
+}