updated README.md

README.md

@@ -4,4 +4,67 @@ Crawlab Go SDK supports Golang-based spiders integration with Crawlab. It contai
 
 ## Basic Usage
 
+```go
+package main
+
+import (
+	"github.com/crawlab-team/crawlab-go-sdk"
+	"github.com/crawlab-team/crawlab-go-sdk/entity"
+)
+
+func main() {
+    item := entity.Item{}
+    item["url"] = "http://example.com"
+    item["title"] = "hello world"
+    _ = crawlab.SaveItem(item)
+}
+
+```
+
 ## Example Using Colly
+
+```go
+package main
+
+import (
+	"fmt"
+	"github.com/apex/log"
+	"github.com/crawlab-team/crawlab-go-sdk"
+	"github.com/crawlab-team/crawlab-go-sdk/entity"
+	"github.com/gocolly/colly/v2"
+	"runtime/debug"
+)
+
+func main() {
+	startUrl := "https://www.baidu.com/s?wd=crawlab"
+
+	c := colly.NewCollector(
+		colly.AllowedDomains("www.baidu.com"),
+		colly.Async(true),
+		colly.UserAgent("Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/84.0.4147.105 Safari/537.36"),
+	)
+
+	c.OnHTML("#content_left > .c-container", func(e *colly.HTMLElement) {
+		item := entity.Item{}
+		item["title"] = e.ChildText("h3.t > a")
+		item["url"] = e.ChildAttr("h3.t > a", "href")
+		if err := crawlab.SaveItem(item); err != nil {
+			log.Errorf("save item error: " + err.Error())
+			debug.PrintStack()
+			return
+		}
+	})
+
+	c.OnRequest(func(r *colly.Request) {
+		log.Debugf(fmt.Sprintf("Visiting %s", r.URL.String()))
+	})
+
+	if err := c.Visit(startUrl); err != nil {
+		log.Errorf("visit error: " + err.Error())
+		debug.PrintStack()
+		panic(fmt.Sprintf("Unable to visit %s", startUrl))
+	}
+
+	c.Wait()
+}
+```