feat: akamai driver cache setting on zero TTL

- When a caching ttl of zero is set, we do not cache anything on the
  edge server. We instead set ttl cache type to be `no-store` where a
  response is never cached, and if any prior policy has allowed objects
  to be cached, this setting will evict the corresponding cache entry.

Change-Id: I8b8da3202285f5ae94a960d5bf878cf267cbbea6

poppy/provider/akamai/services.py

@@ -609,13 +609,23 @@ class ServiceController(base.ServiceBase):
                             # we found an existing matching rule.
                             # add the cache behavior to it
                             found_match = True
-                            rule['behaviors'].append({
+                            if caching_rule.ttl == 0:
-                                'name': 'caching',
+                                # NOTE(TheSriram): if ttl is set zero,
-                                'type': 'fixed',
+                                # we directly serve content from origin and do
-                                # assuming the input number to caching rule
+                                # not cache the content on edge server.
-                                # ttl is in second
+                                rule['behaviors'].append({
-                                'value': '%ss' % caching_rule.ttl
+                                    'name': 'caching',
-                            })
+                                    'type': 'no-store',
+                                    'value': '%ss' % caching_rule.ttl
+                                })
+                            else:
+                                rule['behaviors'].append({
+                                    'name': 'caching',
+                                    'type': 'fixed',
+                                    # assuming the input number to caching rule
+                                    # ttl is in second
+                                    'value': '%ss' % caching_rule.ttl
+                                })
 
                 # if there is no matches entry yet for this rule
                 if not found_match:
@@ -632,13 +642,23 @@ class ServiceController(base.ServiceBase):
                     }
 
                     rule_dict_template['matches'].append(match_rule)
-                    rule_dict_template['behaviors'].append({
+                    if caching_rule.ttl == 0:
-                        'name': 'caching',
+                        # NOTE(TheSriram): if ttl is set zero,
-                        'type': 'fixed',
+                        # we directly serve content from origin and do
-                        # assuming the input number to caching rule
+                        # not cache the content on edge server.
-                        # ttl is in second
+                        rule_dict_template['behaviors'].append({
-                        'value': '%ss' % caching_rule.ttl
+                            'name': 'caching',
-                    })
+                            'type': 'no-store',
+                            'value': '%ss' % caching_rule.ttl
+                        })
+                    else:
+                        rule_dict_template['behaviors'].append({
+                            'name': 'caching',
+                            'type': 'fixed',
+                            # assuming the input number to caching rule
+                            # ttl is in second
+                            'value': '%ss' % caching_rule.ttl
+                        })
                     rules_list.append(rule_dict_template)
             # end loop - caching_rule.rules
         # end loop - caching_rules

tests/api/services/data_create_service.json

@@ -138,6 +138,45 @@
                           "rules": [{"name" : "Rule 1",
                                      "request_url" : "/images/test.jpg"}]}]
     },
+    "multiple_origin_path_multiple_caching_types": {
+        "name": "my_service_name",
+        "domain_list": [{"domain": "mywebsite.com", "protocol": "http"}],
+        "origin_list": [{
+                         "origin": "mywebsite1.com",
+                         "port": 80,
+                         "ssl": false,
+                         "rules":[
+                              {
+                                "name": "default rule",
+                                "request_url": "/*"
+                              }
+                             ],
+                             "hostheadertype": "custom",
+                             "hostheadervalue": "www.customweb.com"
+                         },
+                         {
+                            "origin": "mywebsite2.com",
+                             "port": 80,
+                             "ssl": false,
+                             "rules":[
+                              {
+                                "name": "images rules",
+                                "request_url": "/images/test.jpg"
+                              }
+                             ],
+                             "hostheadertype": "custom",
+                             "hostheadervalue": "www.customweb.com"
+                        }
+                        ],
+        "caching_list": [{"name": "default",
+                          "ttl": 1200,
+                          "rules": [{"name" : "Rule 1",
+                                     "request_url" : "/images/test.jpg"}]},
+                         {"name": "no-store",
+                          "ttl": 0,
+                          "rules": [{"name" : "Rule 2",
+                                     "request_url" : "/news/latestnews.html"}]}]
+    },
     "log_delivery_enabled": {
         "name": "my_service_name",
         "domain_list": [{"domain": "mywebsite.com", "protocol": "http"},

tests/api/services/data_patch_service.json

@@ -166,6 +166,11 @@
          "path": "/caching/0",
          "value": {"name": "cache_name", "ttl": 111, "rules": [{"name" : "index","request_url" : "new_path"}]}}
     ],
+   "replace_caching_with_zero_ttl": [
+        {"op": "replace",
+         "path": "/caching/0",
+         "value": {"name": "dynamic_cache", "ttl": 0, "rules": [{"name" : "dynamic","request_url" : "/latest_news/*"}]}}
+    ],
    "remove_caching": [
         {"op": "remove",
          "path": "/caching/0"}
@@ -181,6 +186,12 @@
          "value": {"name": "cache_name2", "ttl": 121,
                    "rules": [{"name" : "index2",
                               "request_url" : "/index2.htm"}]}
+               },
+        {"op": "add",
+         "path": "/caching/-",
+         "value": {"name": "cache_name3", "ttl": 0,
+                   "rules": [{"name" : "index3",
+                              "request_url" : "/index3.htm"}]}
                }
     ],
    "add_restrictions": [

tests/api/utils/schema/services.py

@@ -53,7 +53,7 @@ origin = {
 cache = {'type': 'object',
          'properties': {
              'name': {'type': 'string'},
-             'ttl': {'type': 'number', 'minimum': 1, 'maximum': 3600},
+             'ttl': {'type': 'number', 'minimum': 0, 'maximum': 3600},
              'rules': {'type': 'array'}},
          'required': ['name', 'ttl'],
          'additionalProperties': False}

tests/unit/provider/akamai/data_service.json

@@ -90,7 +90,19 @@
                   "request_url": "/*.gif"
                 }       
              ]
-		    }
+            },
+            {"name": "zero-cache", "ttl": 0 },
+            {"name": "dynamic-content",
+             "ttl": 0,
+             "rules": [
+                { "name": "dynamic-jpeg-rules",
+                  "request_url": "/*.jpeg"
+                },
+                { "name": "dynamic-gif-rules",
+                  "request_url": "/*.gif"
+                }
+             ]
+            }
         ],
         "flavor_id" : "standard"
     },