docs: update sink-http README

connectors/sink-http/README.md

@@ -1,34 +1,18 @@
-# HTTP-Sink 
+# HTTP Sink 
 
 ## Overview
 
-An HTTP-Source which transforms HTTP requests to CloudEvents and deliver them to the target URI.
-
+A [Vance Connector][vc] which receives CloudEvents and deliver specific data to the target URL.
 ## User guidelines
 
 ### Connector introduction
 
-This HTTP-Source is a [Vance Connector][vc] which aims to wrap incoming HTTP requests in a way that wrapping all headers and body of the 
-original request into the `data` field of a new CloudEvent.
+The HTTP Sink is a [Vance Connector][vc] which aims to handle incoming CloudEvents in a way that extracts the `data` part of the 
+original event and deliver these extracted `data` to the target URL.
 
-For example, if an original request looks like:
+For example, if the incoming CloudEvent looks like:
 
 ```http
-> POST /payload HTTP/2
-
-> Host: localhost:8080
-> User-Agent: VanceCDK-HttpClient/1.0.0
-> Content-Type: application/json
-> Content-Length: 39
-
-> {
->    "myData" : "simulation event data <1>"
-> }
-```
-
-This POST HTTP request will be transformed into a CloudEvent looks like:
-
-``` json
 {
   "id" : "42d5b039-daef-4071-8584-e61df8fc1354",
   "source" : "vance-http-source",
@@ -37,33 +21,38 @@ This POST HTTP request will be transformed into a CloudEvent looks like:
   "datacontenttype" : "application/json",
   "time" : "2022-05-17T18:44:02.681+08:00",
   "data" : {
-    "headers" : {
-      "user-agent" : "VanceCDK-HttpClient/1.0.0",
-      "content-type" : "application/json",
-      "content-length" : "39",
-      "host" : "localhost:8080"
-    },
-    "body" : {
-      "myData" : "simulation event data <1>"
-    }
+    "myData" : "simulation event data <1>"
   }
 }
 ```
 
-**Users of this connector are supposed to transform any HTTP requests into CloudEvents.**
+The HTTP Sink will POST an HTTP request looks like:
 
-## Specify user configs
+``` json
+> POST /payload HTTP/2
+
+> Host: localhost:8080
+> User-Agent: VanceCDK-HttpClient/1.0.0
+> Content-Type: application/json
+> Content-Length: 39
+
+> {
+>    "myData" : "simulation event data <1>"
+> }
+```
+
+## Vance Connector Configs
 
 Users can specify their configs by either setting environments variables or mount a config.json to
-`/vance/config/config.json` when they run the container.
+`/vance/config/config.json` when they run the connector.
 
-### Set environments variables for HTTP-Source
+### Set environments variables for HTTP Sink
 
 ```
-//use V_TARGET to specify the target URI HTTP-Source will send CloudEvents to
+//use V_TARGET to specify the target URI HTTP Sink will send CloudEvents to
 --env "V_TARGET"="http://localhost:8081"
 
-//use V_PORT to specify the port HTTP-Source is listening on
+//use V_PORT to specify the port HTTP Sink is listening on
 --env "V_PORT"="8080"
 ```
 
@@ -73,8 +62,8 @@ Users can specify their configs by either setting environments variables or moun
 
 ```json
 {
-  //use V_TARGET to specify the target URI HTTP-Source will send CloudEvents to.
-  //use V_PORT to specify the port HTTP-Source is listening on.
+  //use V_TARGET to specify the target URI HTTP Sink will send CloudEvents to.
+  //use V_PORT to specify the port HTTP Sink is listening on.
   //JSON standard does not allow comments. Remember to delete these comments when you copy configs.
   "v_target": "http://localhost:8081",
   "v_port": "8080"
@@ -83,21 +72,25 @@ Users can specify their configs by either setting environments variables or moun
 
 ⚠️ **NOTE: json keys MUST be lowercase** ⚠️
 
-## Run HTTP-Source image
+## HTTP Source Image
+
+> docker.io/vancehub/sink-http
+
+## Local Development
 
-## Local development
+You can run the source codes of the HTTP Source locally as well.
 
 ### Building via Maven
 
 ```shell
-$ cd source-http
+$ cd sink-http
 $ mvn clean package
 ```
 
 ### Running via Maven
 
 ```shell
-$ mvn exec:java -Dexec.mainClass="com.linkall.source.mysql.Entrance"
+$ mvn exec:java -Dexec.mainClass="com.linkall.sink.http.Entrance"
 ```
 
 [vc]: https://github.com/JieDing/vance-docs/blob/main/docs/concept.md