From 559bccccd40d028e412d9f11709ded0250ba6dcd Mon Sep 17 00:00:00 2001
From: Linus Nordberg <linus@nordberg.se>
Date: Tue, 24 May 2022 23:33:38 +0200
Subject: implement primary and secondary role, for replication

---
 internal/node/primary/endpoint_external.go | 147 +++++++++++++++++++++++++++++
 1 file changed, 147 insertions(+)
 create mode 100644 internal/node/primary/endpoint_external.go

(limited to 'internal/node/primary/endpoint_external.go')

diff --git a/internal/node/primary/endpoint_external.go b/internal/node/primary/endpoint_external.go
new file mode 100644
index 0000000..42e8fcb
--- /dev/null
+++ b/internal/node/primary/endpoint_external.go
@@ -0,0 +1,147 @@
+package primary
+
+// This file implements external HTTP handler callbacks for primary nodes.
+
+import (
+	"context"
+	"fmt"
+	"net/http"
+
+	"git.sigsum.org/log-go/internal/node/handler"
+	"git.sigsum.org/log-go/internal/requests"
+	"git.sigsum.org/sigsum-go/pkg/log"
+)
+
+func addLeaf(ctx context.Context, c handler.Config, w http.ResponseWriter, r *http.Request) (int, error) {
+	p := c.(Primary)
+	log.Debug("handling add-leaf request")
+	req, err := requests.LeafRequestFromHTTP(r, p.Config.ShardStart, ctx, p.DNS)
+	if err != nil {
+		return http.StatusBadRequest, err
+	}
+
+	sth := p.Stateman.ToCosignTreeHead()
+	sequenced, err := p.TrillianClient.AddLeaf(ctx, req, sth.TreeSize)
+	if err != nil {
+		return http.StatusInternalServerError, err
+	}
+	if sequenced {
+		return http.StatusOK, nil
+	} else {
+		return http.StatusAccepted, nil
+	}
+}
+
+func addCosignature(ctx context.Context, c handler.Config, w http.ResponseWriter, r *http.Request) (int, error) {
+	p := c.(Primary)
+	log.Debug("handling add-cosignature request")
+	req, err := requests.CosignatureRequestFromHTTP(r, p.Witnesses)
+	if err != nil {
+		return http.StatusBadRequest, err
+	}
+	vk := p.Witnesses[req.KeyHash]
+	if err := p.Stateman.AddCosignature(ctx, &vk, &req.Cosignature); err != nil {
+		return http.StatusBadRequest, err
+	}
+	return http.StatusOK, nil
+}
+
+func getTreeHeadToCosign(ctx context.Context, c handler.Config, w http.ResponseWriter, _ *http.Request) (int, error) {
+	p := c.(Primary)
+	log.Debug("handling get-tree-head-to-cosign request")
+	sth := p.Stateman.ToCosignTreeHead()
+	if err := sth.ToASCII(w); err != nil {
+		return http.StatusInternalServerError, err
+	}
+	return http.StatusOK, nil
+}
+
+func getTreeHeadCosigned(ctx context.Context, c handler.Config, w http.ResponseWriter, _ *http.Request) (int, error) {
+	p := c.(Primary)
+	log.Debug("handling get-tree-head-cosigned request")
+	cth, err := p.Stateman.CosignedTreeHead(ctx)
+	if err != nil {
+		return http.StatusInternalServerError, err
+	}
+	if err := cth.ToASCII(w); err != nil {
+		return http.StatusInternalServerError, err
+	}
+	return http.StatusOK, nil
+}
+
+func getConsistencyProof(ctx context.Context, c handler.Config, w http.ResponseWriter, r *http.Request) (int, error) {
+	p := c.(Primary)
+	log.Debug("handling get-consistency-proof request")
+	req, err := requests.ConsistencyProofRequestFromHTTP(r)
+	if err != nil {
+		return http.StatusBadRequest, err
+	}
+
+	curTree := p.Stateman.ToCosignTreeHead()
+	if req.NewSize > curTree.TreeHead.TreeSize {
+		return http.StatusBadRequest, fmt.Errorf("new_size outside of current tree")
+	}
+
+	proof, err := p.TrillianClient.GetConsistencyProof(ctx, req)
+	if err != nil {
+		return http.StatusInternalServerError, err
+	}
+	if err := proof.ToASCII(w); err != nil {
+		return http.StatusInternalServerError, err
+	}
+	return http.StatusOK, nil
+}
+
+func getInclusionProof(ctx context.Context, c handler.Config, w http.ResponseWriter, r *http.Request) (int, error) {
+	p := c.(Primary)
+	log.Debug("handling get-inclusion-proof request")
+	req, err := requests.InclusionProofRequestFromHTTP(r)
+	if err != nil {
+		return http.StatusBadRequest, err
+	}
+
+	curTree := p.Stateman.ToCosignTreeHead()
+	if req.TreeSize > curTree.TreeHead.TreeSize {
+		return http.StatusBadRequest, fmt.Errorf("tree_size outside of current tree")
+	}
+
+	proof, err := p.TrillianClient.GetInclusionProof(ctx, req)
+	if err != nil {
+		return http.StatusInternalServerError, err
+	}
+	if err := proof.ToASCII(w); err != nil {
+		return http.StatusInternalServerError, err
+	}
+	return http.StatusOK, nil
+}
+
+func getLeavesGeneral(ctx context.Context, c handler.Config, w http.ResponseWriter, r *http.Request, doLimitToCurrentTree bool) (int, error) {
+	p := c.(Primary)
+	log.Debug("handling get-leaves request")
+	req, err := requests.LeavesRequestFromHTTP(r, uint64(p.MaxRange))
+	if err != nil {
+		return http.StatusBadRequest, err
+	}
+
+	if doLimitToCurrentTree {
+		curTree := p.Stateman.ToCosignTreeHead()
+		if req.EndSize >= curTree.TreeHead.TreeSize {
+			return http.StatusBadRequest, fmt.Errorf("end_size outside of current tree")
+		}
+	}
+
+	leaves, err := p.TrillianClient.GetLeaves(ctx, req)
+	if err != nil {
+		return http.StatusInternalServerError, err
+	}
+	for _, leaf := range *leaves {
+		if err := leaf.ToASCII(w); err != nil {
+			return http.StatusInternalServerError, err
+		}
+	}
+	return http.StatusOK, nil
+}
+
+func getLeavesExternal(ctx context.Context, c handler.Config, w http.ResponseWriter, r *http.Request) (int, error) {
+	return getLeavesGeneral(ctx, c, w, r, true)
+}
-- 
cgit v1.2.3