Further interface prototyping

2 files changed, 82 insertions, 0 deletions

diff --git a/brep/module b/brep/module
new file mode 100644
index 0000000..6687a31
--- /dev/null
+++ b/brep/module
@@ -0,0 +1,43 @@
+// file      : brep/module -*- C++ -*-
+// copyright : Copyright (c) 2014-2015 Code Synthesis Tools CC
+// license   : MIT; see accompanying LICENSE file
+
+#ifndef BREP_MODULE
+#define BREP_MODULE
+
+namespace brep
+{
+  // This exception is used to signal that the request is invalid
+  // (4XX codes) rather than that it could not be processed (5XX).
+  // By default 422 is returned, which means the request was
+  // semantically invalid.
+  //
+  struct invalid_request
+  {
+    web::status_code status {422};
+    std::string description;
+
+    //@@ Maybe optional "try again" link?
+    //
+  };
+
+  // Adaptation of the web::module to our needs.
+  //
+  class module: public web::module
+  {
+  public:
+    virtual void
+    handle (request&, response&) = 0;
+
+    // Implementation details.
+    //
+  protected:
+    virtual void
+    handle (request&, response&, log&);
+
+  protected:
+    log* log_;
+  };
+}
+
+#endif // BREP_MODULE
diff --git a/brep/module.cxx b/brep/module.cxx
new file mode 100644
index 0000000..1837ccd
--- /dev/null
+++ b/brep/module.cxx
@@ -0,0 +1,39 @@
+// file      : brep/module.cxx -*- C++ -*-
+// copyright : Copyright (c) 2014-2015 Code Synthesis Tools CC
+// license   : MIT; see accompanying LICENSE file
+
+#include <brep/module>
+
+using namespace std;
+
+namespace brep
+{
+  void module::
+  handle (request& rq, response& rs, log& l)
+  {
+    log_ = &l;
+
+    try
+    {
+      handle (rq, rs);
+    }
+    catch (const invalid_request& e)
+    {
+      // @@ Format as HTML in proper style.
+      //
+      rs.content (e.status, "text/html;charset=utf-8") << e.description;
+    }
+    catch (const exception& e)
+    {
+      // @@ Exception: log e.what () & 505.
+      //
+      rs.status (505);
+    }
+    catch (...)
+    {
+      // @@ Unknown exception: log & 505.
+      //
+      rs.status (505);
+    }
+  }
+}