Make badmultipart an IOError.

[wrw.git] / wrw / form.py

diff --git a/wrw/form.py b/wrw/form.py
index 7f4930d..d39d4dd 100644 (file)
--- a/wrw/form.py
+++ b/wrw/form.py
@@ -7,13 +7,16 @@ def formparse(req):
     buf = {}
     buf.update(urllib.parse.parse_qsl(req.query))
     if req.ihead.get("Content-Type") == "application/x-www-form-urlencoded":
-        rbody = req.input.read(2 ** 20)
+        try:
+            rbody = req.input.read(2 ** 20)
+        except IOError as exc:
+            return exc
         if len(rbody) >= 2 ** 20:
-            raise ValueError("x-www-form-urlencoded data is absurdly long")
+            return ValueError("x-www-form-urlencoded data is absurdly long")
         buf.update(urllib.parse.parse_qsl(rbody.decode("latin1")))
     return buf
 
-class badmultipart(Exception):
+class badmultipart(IOError):
     pass
 
 class formpart(object):
@@ -81,7 +84,9 @@ class formpart(object):
                 return ret
 
     def close(self):
-        self.fillbuf(-1)
+        while True:
+            if self.read(8192) == b"":
+                break
 
     def __enter__(self):
         return self
@@ -159,5 +164,10 @@ class multipart(object):
         self.lastpart.parsehead(self.headcs)
         return self.lastpart
 
-def formdata(req):
-    return req.item(formparse)
+def formdata(req, onerror=Exception):
+    data = req.item(formparse)
+    if isinstance(data, Exception):
+        if onerror is Exception:
+            raise data
+        return onerror
+    return data