Fix for SF bug 988120 via patch 1061941.

If read() returned less than the number of bytes request, the full amount was subtracted from length instead of the actually read amount.

Lib/httplib.py

@@ -457,10 +457,11 @@ def read(self, amt=None):
 
         if amt is None:
             # unbounded read
-            if self.will_close:
+            if self.length is None:
                 s = self.fp.read()
             else:
                 s = self._safe_read(self.length)
+                self.length = 0
             self.close()        # we read everything
             return s
 
@@ -468,12 +469,13 @@ def read(self, amt=None):
             if amt > self.length:
                 # clip the read to the "end of response"
                 amt = self.length
-            self.length -= amt
 
         # we do not use _safe_read() here because this may be a .will_close
         # connection, and the user is reading more bytes than will be provided
         # (for example, reading in 1k chunks)
         s = self.fp.read(amt)
+        if self.length is not None:
+            self.length -= len(s)
 
         return s