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--- couchbase [2015/05/04 18:59] – created skipidar
+++ couchbase [2020/12/27 20:35] (current) – external edit 127.0.0.1
@@ Line 1: / Line 1: @@
+===== CouchBase =====
+==== CouchBase Lite ====
+=== Authentication ===
+== Registration of new users ==
+Creating a User is done via the Admin Port of the REST API: \\
+http://developer.couchbase.com/mobile/develop/guides/sync-gateway/administering-sync-gateway/authorizing-users/index.html
+<code>
+curl -X POST http://localhost:4985/${db}/_user/ -d '{"name":"foo", "password":"bar"}'
+</code>
+== Restrict reading the document ==
+Channels legitimate a user to read documents.
+A user is legitimated to access a channel.
+User's documents are marked by channels.
+== Restrict writing the document to it's owner ==
+This is done inside the **Sync function**, which is defined during the start of the Sync Gateway
+<code>
+# this required the currently logged in user - to be the sam as mentioned in oldDoc's user property
+requireUser(oldDoc.user)
+</code>
+The write restriction may be defined by:
+  * rolename
+  * channel
+  * username
+http://developer.couchbase.com/mobile/develop/guides/sync-gateway/sync-function-api-guide/validation/index.html
+=== Manual Authentication ===
+     * Your app prompts user for credentials
+     * Your app directly contacts your app server with these credentials
+     * Your app server creates a session on the Sync Gateway, which returns a cookie
+     * Your app server returns this cookie to your app
+http://wiki.nginx.org/Modules
+NGinx may be used
+  * to implement a reverse Proxy, to protect the connection with SSL
+  * with embedded PERL
+  * provide the user registration API
+==== CouchBase ====
+The NoSQL Server. Stores data as documents.
+==== Sync Gateway ====
+== Glossary ==
+|DataBase| The database maps to a bucket. A single Sync Gateway may publish buckets as databases. Below the DB **gw** points to the bucket **sync_gateway**|
+|Server| The server is the storage, where the Sync Gateway will put hte data in. It may be a Couchase Server or a Walrus Server (File System DB)          "server":"C:\Couchbase\Walrus\default.walrus"|
+<code>
+{
+   "log": ["CRUD", "CRUD+", "HTTP", "HTTP+", "Access", "Cache", "Changes", "Changes+"],
+   "interface":":4984",
+   "adminInterface":":4985",
+   "facebook":{
+      "register":true
+   },
+   "databases":{
+      "gw":{
+         "server":"http://localhost:8091",
+         "bucket":"sync_gateway",
+         "sync":`function(doc) {
+			if (doc._deleted) {
+				requireUser(oldDoc.writers);
+				return;
+			}
+			if (!doc.title || !doc.creator || !doc.writers) {
+				throw({forbidden: "Missing required properties"});
+			} else if (doc.writers.length == 0) {
+				throw({forbidden: "No writers"});
+			}
+			if (oldDoc == null) {
+				requireUser(doc.creator);
+			} else {
+				requireUser(oldDoc.writers);
+				if (doc.creator != oldDoc.creator) {
+					throw({forbidden: "Can't change creator"});
+				}
+			}
+			// add channel with the username to the doc
+			channel ("channel_" + doc.creator);
+			// add access to the channel username to the user
+			access (doc.creator, [doc.creator, "*"]);
+		 }`,
+		 "users": {
+				"GUEST": {"disabled": true, "admin_channels": ["*"] }
+		  }
+      }
+   },
+  "persona" : {
+     "origin" : "http://example.com/",
+     "register" : true
+  }
+}
+</code>
+== Create user, assign channel==
+User has to have access to it's own channel, in order to have the ability to read docs.
+<sxh powershell>
+# Sync Gateway request:  Create a new user via a direct Sync Gateway request
+$method = "PUT"
+$resource = "http://192.168.191.210:4985/gw/_user/skipxxx"
+$body = "{
+    ""name"":""skipxxx"",
+    ""password"":""pass"",
+    ""admin_channels"":[""channel_skipxxx""],
+    ""admin_roles"":[""editor""],
+    ""disabled"":false
+}"
+echo $body;
+Invoke-RestMethod -Method $method -Uri $resource -Body $body -ContentType 'application/json'
+</sxh>
+== Create a doc  which is assigned to user's channel==
+Assigning is done automatically, by the **sync_funcion**, when a user creates a document. see
+<code>
+// add channel with the username to the doc
+channel ("channel_" + doc.creator);
+</code>
+Alternatively the doc may be added by powershell
+<sxh powershell>
+# create a document by REST API
+$now = $(get-date);
+$resource = "http://192.168.191.210:4985/gw/"
+$method = "POST"
+$body = "{
+    ""type"":""FromConsoleType3"",
+    ""title"":""Document from Console3"",
+    ""checked"":""true"",
+    ""created_at"":""$now"",
+    ""creator"":""skipxxx"",
+    ""writers"":[""skipxxx""]
+}"
+$securepassword = ConvertTo-SecureString "pass" -AsPlainText -Force
+$credentials = New-Object System.Management.Automation.PSCredential("skipxxx", $securepassword)
+Invoke-WebRequest -Uri $resource -Method POST -Credential $credentials -Body $body  -ContentType application/json
+</sxh>
+This is how the document may look like
+<code>
+{
+  "_sync": {
+    "rev": "1-ec4f884fae1ded971b5fbd18f9c07060",
+    "sequence": 7,
+    "history": {
+      "revs": [
+        "1-ec4f884fae1ded971b5fbd18f9c07060"
+      ],
+      "parents": [
+        -1
+      ],
+      "bodies": [
+        ""
+      ],
+      "channels": [
+        [
+          "channel_skipxxx"
+        ]
+      ]
+    },
+    "channels": {
+      "channel_skipxxx": null
+    },
+    "access": {
+      "skipxxx": {
+        "skipxxx": 7
+      }
+    },
+    "time_saved": "2015-06-21T11:55:23.1276655-07:00"
+  },
+  "checked": "true",
+  "created_at": "06/21/2015 20:55:17",
+  "creator": "skipxxx",
+  "title": "Document from Console3",
+  "type": "FromConsoleType3",
+  "writers": [
+    "skipxxx"
+  ]
+}
+</code>
+The channels which this doc is assigned to is listed here:
+<code>
+    "channels": {
+      "channel_skipxxx": null
+    },
+</code>
+== Now the docs may be synced  ==
+The docs may be synced, without setting any channel.
+Then all available docs will be pulled
+<sxh java>
+        pullReplication = database.createPullReplication(syncUrl);
+        pullReplication.setContinuous(true);
+        pushReplication = database.createPushReplication(syncUrl);
+        pushReplication.setContinuous(true);
+        pushReplication.start();
+        pullReplication.start();
+</sxh>