Changeset c259a77

Timestamp:

Jun 3, 2014 4:29:31 PM (10 years ago)

Author:

Ted Faber <faber@…>

Branches:

master

Children:

0b217d1

Parents:

ba07149

Message:

Service info in xml files.

Location:

fedd

Files:

• fedd_create.py (modified) (5 diffs)
• fedd_ns2topdl.py (modified) (4 diffs)
• federation/client_lib.py (modified) (2 diffs)

fedd/fedd_create.py

@@ -17 +17 @@
 from federation.client_lib import client_opts, exit_with_fault, RPCException, \
         wrangle_standard_options, do_rpc, get_experiment_names, save_certfile,\
-        get_abac_certs, log_authentication
+        get_abac_certs, log_authentication, parse_service,\
+        service_dict_to_line, ns_service_re, extract_services_from_xml
 from federation.util import abac_split_cert, abac_context_to_creds
 
@@ -58 +59 @@
         self.set_defaults(delegate=True)
 
-def parse_service(svc):
-    """
-    Pasre a service entry into a hash representing a service entry in a
-    message.  The format is:
-        svc_name:exporter(s):importer(s):attr=val,attr=val
-    The svc_name is teh service name, exporter is the exporting testbeds
-    (comma-separated) importer is the importing testbeds (if any) and the rest
-    are attr=val pairs that will become attributes of the service.  These
-    include parameters and other such stuff.
-    """
-
-    terms = svc.split(':')
-    svcd = { }
-    if len(terms) < 2 or len(terms[0]) == 0 or len(terms[1]) == 0:
-        sys.exit("Bad service description '%s': Not enough terms" % svc)
-    
-    svcd['name'] = terms[0]
-    svcd['export'] = terms[1].split(",")
-    if len(terms) > 2 and len(terms[2]) > 0:
-        svcd['import'] = terms[2].split(",")
-    if len(terms) > 3 and len(terms[3]) > 0:
-        svcd['fedAttr'] = [ ]
-        for t in terms[3].split(";"):
-            i = t.find("=")
-            if i != -1 :
-                svcd['fedAttr'].append(
-                        {'attribute': t[0:i], 'value': t[i+1:]})
-            else:
-                sys.exit("Bad service attribute '%s': no equals sign" % t)
-    return svcd
-
 def project_export_service(master, project):
     """
@@ -156 +126 @@
 
 # Main line
-service_re = re.compile('^\\s*#\\s*SERVICE:\\s*([\\S]+)')
 parser = fedd_create_opts()
 (opts, args) = parser.parse_args()
@@ -173 +142 @@
     try:
         top = topdl.topology_from_xml(filename=opts.file, top='experiment')
+        # Pull any service descriptions from the file as well
+        svcs = extract_services_from_xml(filename=opts.file)
     except EnvironmentError:
         # Can't read the file, fail now
@@ -186 +157 @@
             # Parse all the strings that we can pull out of the file using the
             # service_re.
-            svcs.extend([parse_service(service_re.match(l).group(1)) \
-                    for l in lines if service_re.match(l)])
+            svcs.extend([parse_service(ns_service_re.match(l).group(1)) \
+                    for l in lines if ns_service_re.match(l)])
         except EnvironmentError:
             sys.exit("Cannot read description file (%s)" %opts.file)

fedd/fedd_ns2topdl.py

@@ -8 +8 @@
 from federation.remote_service import service_caller
 from federation.client_lib import client_opts, exit_with_fault, RPCException, \
-        wrangle_standard_options, do_rpc, get_experiment_names, save_certfile
+        wrangle_standard_options, do_rpc, get_experiment_names, save_certfile,\
+        ns_service_re
 
 class ns_topdl_opts(client_opts):
@@ -26 +27 @@
 except RuntimeError, e:
     sys.exit("%s" %e)
-
+svcs = []
+contents = ''
 if opts.file:
     try:
-        contents = "".join([l for l in open(opts.file, "r")])
+        for l in open(opts.file, 'r'):
+            contents += l
+            if  ns_service_re.match(l):
+                svcs.append('SERVICE: %s' % ns_service_re.match(l).group(1))
     except EnvironmentError, e:
         sys.exit("Can't read %s: %s" % (opts.file, e))
@@ -62 +67 @@
     sys.exit("Bad response. %s" % e.message)
 
+if len(svcs) > 0 :
+    comments = '<!--\n%s\n-->' % '\n'.join(svcs)
+else:
+    comments = ''
+
 if opts.outfile:
     try:
         f = open(opts.outfile, "w")
+        print >>f, comments
         print >>f, topdl.topology_to_xml(top, top="experiment")
         f.close()
@@ -70 +81 @@
         sys.exit("Can't write to %s: %s" % (opts.outfile, e))
 else:
+    print comments
     print topdl.topology_to_xml(top, top="experiment")
 proof = proof.from_dict(resp_dict.get('proof', {}))

fedd/federation/client_lib.py

@@ -4 +4 @@
 import pwd
 import os
+import re
 import os.path
+import xml.parsers.expat
 
 from string import join
 from datetime import datetime
-
 
 from deter import fedid
@@ -137 +138 @@
     return rv
 
+ns_service_re = re.compile('^\\s*#\\s*SERVICE:\\s*([\\S]+)')
+xml_service_re = re.compile('SERVICE:\\s*([\\S]+)\\s*$')
+
+def parse_service(svc):
+    """
+    Pasre a service entry into a hash representing a service entry in a
+    message.  The format is:
+        svc_name:exporter(s):importer(s):attr=val,attr=val
+    The svc_name is the service name, exporter is the exporting testbeds
+    (comma-separated) importer is the importing testbeds (if any) and the rest
+    are attr=val pairs that will become attributes of the service.  These
+    include parameters and other such stuff.
+    """
+
+    terms = svc.split(':')
+    svcd = { }
+    if len(terms) < 2 or len(terms[0]) == 0 or len(terms[1]) == 0:
+        sys.exit("Bad service description '%s': Not enough terms" % svc)
+
+    svcd['name'] = terms[0]
+    svcd['export'] = terms[1].split(",")
+    if len(terms) > 2 and len(terms[2]) > 0:
+        svcd['import'] = terms[2].split(",")
+    if len(terms) > 3 and len(terms[3]) > 0:
+        svcd['fedAttr'] = [ ]
+        for t in terms[3].split(";"):
+            i = t.find("=")
+            if i != -1 :
+                svcd['fedAttr'].append(
+                        {'attribute': t[0:i], 'value': t[i+1:]})
+            else:
+                sys.exit("Bad service attribute '%s': no equals sign" % t)
+    return svcd
+
+def service_dict_to_line(d):
+    """
+    Convert a dict containing a service description into a colon separated
+    service description suitable for inclusion in a file or command line.
+    """
+
+    return 'SERVICE: %s' % (
+            ':'.join([
+                d.get('name', ''),
+                ','.join(d.get('export','')),
+                ','.join(d.get('import','')),
+                ','.join([
+                    '='.join((dd.get('attribute', ''), dd.get('value',''))) \
+                        for dd in d.get('fedAttr', [])
+                ])
+            ]))
+
+def extract_services_from_xml(string=None, file=None, filename=None):
+    class parser:
+        def __init__(self):
+            self.svcs = []
+        def comment_handler(self, data):
+            for l in data.split('\n'):
+                if xml_service_re.match(l):
+                    self.svcs.append(
+                            parse_service(xml_service_re.match(l).group(1)))
+
+    p = parser()
+    xp = xml.parsers.expat.ParserCreate()
+
+    xp.CommentHandler = p.comment_handler
+
+    num_set = len([ x for x in (string, filename, file)\
+            if x is not None ])
+
+    if num_set != 1:
+        raise RuntimeError("Exactly one one of file, filename and string " + \
+                "must be set")
+    elif filename:
+        f = open(filename, "r")
+        xp.ParseFile(f)
+        f.close()
+    elif file:
+        xp.ParseFile(file)
+    elif string:
+        xp.Parse(string, True)
+
+    return p.svcs
+
 def wrangle_standard_options(opts):
     """