From 5ba3cec231989ba1deb5926f8fdcd8caec169821 Mon Sep 17 00:00:00 2001
From: Rasmus Dahlberg <rasmus.dahlberg@kau.se>
Date: Thu, 5 Nov 2020 18:17:23 +0100
Subject: added client-side get-entries

---
 client/client.go           | 20 ++++++++++++++--
 client/get-entries/main.go | 60 ++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 78 insertions(+), 2 deletions(-)
 create mode 100644 client/get-entries/main.go

diff --git a/client/client.go b/client/client.go
index 5f24fdc..43386b0 100644
--- a/client/client.go
+++ b/client/client.go
@@ -193,8 +193,24 @@ func (c *Client) GetProofByHash(ctx context.Context, treeSize uint64, rootHash,
 	return item, nil
 }
 
-func (c *Client) GetEntries(ctx context.Context, start, end uint64) (*stfe.StItem, error) {
-	return nil, fmt.Errorf("TODO: Client.GetEntries()")
+func (c *Client) GetEntries(ctx context.Context, start, end uint64) ([]*stfe.GetEntryResponse, error) {
+	req, err := http.NewRequest("GET", c.protocol()+c.Log.BaseUrl+"/get-entries", nil)
+	if err != nil {
+		return nil, fmt.Errorf("failed creating http request: %v", err)
+	}
+	req.Header.Set("Content-Type", "application/json")
+	q := req.URL.Query()
+	q.Add("start", fmt.Sprintf("%d", start))
+	q.Add("end", fmt.Sprintf("%d", end))
+	req.URL.RawQuery = q.Encode()
+	glog.V(2).Infof("created http request: %s %s", req.Method, req.URL)
+
+	var rsp []*stfe.GetEntryResponse
+	if err := c.doRequest(ctx, req, &rsp); err != nil {
+		return nil, err
+	}
+	// TODO: verify signature over leaf data
+	return rsp, nil
 }
 
 // GetAnchors fetches the log's trust anchors.  Safe to use without a client
diff --git a/client/get-entries/main.go b/client/get-entries/main.go
new file mode 100644
index 0000000..6a45707
--- /dev/null
+++ b/client/get-entries/main.go
@@ -0,0 +1,60 @@
+package main
+
+import (
+	"context"
+	"flag"
+	"fmt"
+
+	"net/http"
+
+	"github.com/golang/glog"
+	"github.com/system-transparency/stfe"
+	"github.com/system-transparency/stfe/client"
+)
+
+var (
+	operators = flag.String("operators", "../../descriptor/stfe.json", "path to json-encoded list of log operators")
+	logId     = flag.String("log_id", "B9oCJk4XIOMXba8dBM5yUj+NLtqTE6xHwbvR9dYkHPM=", "base64-encoded log identifier")
+	start     = flag.Uint64("start", 50, "inclusive start index to download")
+	end       = flag.Uint64("end", 60, "inclusive stop index to download")
+)
+
+func main() {
+	flag.Parse()
+
+	client, err := client.NewClientFromPath(*logId, "", "", *operators, &http.Client{}, true)
+	if err != nil {
+		glog.Fatal(err)
+	}
+
+	items := make([]*stfe.StItem, 0, *end-*start+1)
+	i := *start
+	for len(items) != cap(items) {
+		rsps, err := client.GetEntries(context.Background(), i, *end)
+		if err != nil {
+			glog.Fatal(err)
+		}
+
+		for _, rsp := range rsps {
+			var item stfe.StItem
+			if err := item.Unmarshal(rsp.Leaf); err != nil {
+				glog.Fatalf("bad StItem: unmarshal failed: %v", err)
+			} else if item.Format != stfe.StFormatChecksumV1 {
+				glog.Fatalf("bad StFormat: %v", item.Format)
+			}
+			items = append(items, &item)
+		}
+		i += uint64(len(rsps))
+	}
+
+	for i, item := range items {
+		glog.V(2).Infof("Index(%d): %s", *start+uint64(i), item)
+		str, err := item.MarshalB64()
+		if err != nil {
+			glog.Fatalf("bad StItem: marshal failed: %v", err)
+		}
+		fmt.Printf("Index(%d): %s\n", *start+uint64(i), str)
+	}
+
+	glog.Flush()
+}
-- 
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