[Libguestfs] [PATCH] v2v: -o rhv-upload: Fix request headers in pread

[Nir Soffer]

headers was initialized with a set literal {"key", "value"} instead of
dict literal {"key": "value"}.

Calling pread() will fail with:

    AttributeError: 'set' object has no attribute 'items'

I did not test the changed code, but it was not tested before, so it is
unlikely to be worse.

Detected by pylint.
---
 v2v/rhv-upload-plugin.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/v2v/rhv-upload-plugin.py b/v2v/rhv-upload-plugin.py
index 3272c3ce3..e651bc686 100644
--- a/v2v/rhv-upload-plugin.py
+++ b/v2v/rhv-upload-plugin.py
@@ -321,41 +321,41 @@ def request_failed(h, r, msg):
         body = "(Unable to read response body: %s)" % e
 
     # Log the full error if we're verbose.
     debug("unexpected response from imageio server:")
     debug(msg)
     debug("%d: %s" % (status, reason))
     debug(body)
 
     # Only a short error is included in the exception.
     raise RuntimeError("%s: %d %s: %r" % (msg, status, reason, body[:200]))
 
 # For documentation see:
 # https://github.com/oVirt/ovirt-imageio/blob/master/docs/random-io.md
 # For examples of working code to read/write from the server, see:
 # https://github.com/oVirt/ovirt-imageio/blob/master/daemon/test/server_test.py
 
 def pread(h, count, offset):
     http = h['http']
     transfer = h['transfer']
 
-    headers = {"Range", "bytes=%d-%d" % (offset, offset+count-1)}
+    headers = {"Range": "bytes=%d-%d" % (offset, offset+count-1)}
     if h['needs_auth']:
         headers["Authorization"] = transfer.signed_ticket
 
     http.request("GET", h['path'], headers=headers)
 
     r = http.getresponse()
     # 206 = HTTP Partial Content.
     if r.status != 206:
         request_failed(h, r,
                        "could not read sector offset %d size %d" %
                        (offset, count))
 
     return r.read()
 
 def pwrite(h, buf, offset):
     http = h['http']
     transfer = h['transfer']
 
     count = len(buf)
     h['highestwrite'] = max(h['highestwrite'], offset+count)
-- 
2.17.2