Handle Z_BUF_ERROR as a non-fatal error while incrementally decompressing

net/spdy/spdy_framer.cc

Index: net/spdy/spdy_framer.cc
===================================================================
--- net/spdy/spdy_framer.cc	(revision 117344)
+++ net/spdy/spdy_framer.cc	(working copy)
@@ -1526,7 +1526,7 @@
     decomp->next_out = reinterpret_cast<Bytef*>(buffer);
     decomp->avail_out = arraysize(buffer);
     int rv = DecompressHeaderBlockInZStream(decomp);
-    if (rv != Z_OK) {
+    if (rv != Z_OK && rv != Z_BUF_ERROR) {

[wtc, 2012/01/12 23:49:38]

Z_BUF_ERROR means "no progress is possible".  With that
knowledge, we may be able to do something simpler.

[ramant (doing other things), 2012/01/13 00:14:58]

Wan-Teh and I had stepped through the code and we are satisfied with the fix. It
exits the function because decomp->avail_in is zero.

Will discuss with server group if we could rearrange this code so that it is
more readable.

Done.

       set_error(SPDY_DECOMPRESS_FAILURE);
       DLOG(WARNING) << "inflate failure: " << rv;
       processed_successfully = false;