reguire gnupg1 on f>=31; sense the system to use gpg1 when installed

[nodemanager.git] / curlwrapper.py

diff --git a/curlwrapper.py b/curlwrapper.py
index 97a35a3..a877b07 100644 (file)
--- a/curlwrapper.py
+++ b/curlwrapper.py
@@ -1,18 +1,50 @@
+# Note
+# in spring 2010, an attempt was made to use pycurl instead of forking curl
+# it turned out, however, that after around 10 cycles of the nodemanager,
+# attempts to call GetSlivers were failing with a curl error 60
+# we are thus reverting to the version from tag curlwrapper.py-NodeManager-2.0-8
+# the (broken) pycurl version can be found in tags 2.0-9 and 2.0-10
+
 from subprocess import PIPE, Popen
+from select import select
+import xmlrpc.client
+import signal
+import os
+
+import logger
 
+verbose=False
+#verbose=True
 
-class CurlException(Exception): pass
+class Sopen(Popen):
+    def kill(self, signal = signal.SIGTERM):
+        os.kill(self.pid, signal)
 
-def retrieve(url, cacert=None, postdata=None, timeout=300):
-    options = ('/usr/bin/curl',)
-    if cacert: options += ('--cacert', cacert)
-    if postdata: options += ('--data', '@-')
-    if timeout: options += ('--max-time', str(timeout))
-    p = Popen(options + (url,), stdin=PIPE, stdout=PIPE, stderr=PIPE)
+def retrieve(url, cacert=None, postdata=None, timeout=90):
+#    command = ('/usr/bin/curl', '--fail', '--silent')
+    command = ('/usr/bin/curl', '--fail', )
+    if cacert: command += ('--cacert', cacert)
+    if postdata: command += ('--data', '@-')
+    if timeout: 
+        command += ('--max-time', str(timeout))
+        command += ('--connect-timeout', str(timeout))
+    command += (url, )
+    if verbose:
+        print('Invoking ', command)
+        if postdata: print('with postdata=', postdata)
+    p = Sopen(command , stdin=PIPE, stdout=PIPE, stderr=PIPE, close_fds=True)
     if postdata: p.stdin.write(postdata)
     p.stdin.close()
+    sout, sin, serr = select([p.stdout, p.stderr], [], [], timeout)
+    if len(sout) == 0 and len(sin) == 0 and len(serr) == 0: 
+        logger.verbose("curlwrapper: timed out after %s" % timeout)
+        p.kill(signal.SIGKILL) 
     data = p.stdout.read()
     err = p.stderr.read()
     rc = p.wait()
-    if rc != 0: raise CurlException(err)
-    else: return data
+    if rc != 0: 
+        # when this triggers, the error sometimes doesn't get printed
+        logger.log ("curlwrapper: retrieve, got stderr <%s>"%err)
+        raise xmlrpc.client.ProtocolError(url, rc, err, postdata)
+    else: 
+        return data