Grab downloader

vendor/github.com/cavaliercoder/grab/example_request_test.go

@@ -0,0 +1,52 @@
+package grab
+
+import (
+	"context"
+	"crypto/sha256"
+	"encoding/hex"
+	"fmt"
+	"time"
+)
+
+func ExampleRequest_WithContext() {
+	// create context with a 100ms timeout
+	ctx, cancel := context.WithTimeout(context.Background(), 100*time.Millisecond)
+	defer cancel()
+
+	// create download request with context
+	req, err := NewRequest("", "http://example.com/example.zip")
+	if err != nil {
+		panic(err)
+	}
+	req = req.WithContext(ctx)
+
+	// send download request
+	resp := DefaultClient.Do(req)
+	if err := resp.Err(); err != nil {
+		fmt.Println("error: request cancelled")
+	}
+
+	// Output:
+	// error: request cancelled
+}
+
+func ExampleRequest_SetChecksum() {
+	// create download request
+	req, err := NewRequest("", "http://example.com/example.zip")
+	if err != nil {
+		panic(err)
+	}
+
+	// set request checksum
+	sum, err := hex.DecodeString("33daf4c03f86120fdfdc66bddf6bfff4661c7ca11c5da473e537f4d69b470e57")
+	if err != nil {
+		panic(err)
+	}
+	req.SetChecksum(sha256.New(), sum, true)
+
+	// download and validate file
+	resp := DefaultClient.Do(req)
+	if err := resp.Err(); err != nil {
+		panic(err)
+	}
+}