mirror of
https://gitlab.com/pulsechaincom/prysm-pulse.git
synced 2025-01-16 14:58:46 +00:00
121 lines
3.5 KiB
Go
121 lines
3.5 KiB
Go
package blockchain
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import (
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"bytes"
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"encoding/hex"
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"fmt"
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"net/http"
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"sort"
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"strconv"
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"github.com/emicklei/dot"
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"github.com/prysmaticlabs/prysm/shared/bytesutil"
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"github.com/sirupsen/logrus"
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)
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const latestSlotCount = 10
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// HeadsHandler is a handler to serve /heads page in metrics.
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func (s *Service) HeadsHandler(w http.ResponseWriter, _ *http.Request) {
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buf := new(bytes.Buffer)
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if _, err := fmt.Fprintf(w, "\n %s\t%s\t", "Head slot", "Head root"); err != nil {
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logrus.WithError(err).Error("Failed to render chain heads page")
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return
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}
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if _, err := fmt.Fprintf(w, "\n %s\t%s\t", "---------", "---------"); err != nil {
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logrus.WithError(err).Error("Failed to render chain heads page")
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return
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}
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slots := s.latestHeadSlots()
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for _, slot := range slots {
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r := hex.EncodeToString(bytesutil.Trunc(s.canonicalRoots[uint64(slot)]))
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if _, err := fmt.Fprintf(w, "\n %d\t\t%s\t", slot, r); err != nil {
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logrus.WithError(err).Error("Failed to render chain heads page")
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return
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}
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}
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w.WriteHeader(http.StatusOK)
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if _, err := w.Write(buf.Bytes()); err != nil {
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log.WithError(err).Error("Failed to render chain heads page")
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}
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}
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const template = `<html>
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<head>
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<script src="//cdnjs.cloudflare.com/ajax/libs/viz.js/2.1.2/viz.js"></script>
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<script src="//cdnjs.cloudflare.com/ajax/libs/viz.js/2.1.2/full.render.js"></script>
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<body>
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<script type="application/javascript">
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var graph = ` + "`%s`;" + `
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var viz = new Viz();
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viz.renderSVGElement(graph) // reading the graph.
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.then(function(element) {
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document.body.appendChild(element); // appends to document.
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})
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.catch(error => {
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// Create a new Viz instance (@see Caveats page for more info)
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viz = new Viz();
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// Possibly display the error
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console.error(error);
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});
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</script>
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</head>
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</body>
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</html>`
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// TreeHandler is a handler to serve /tree page in metrics.
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func (s *Service) TreeHandler(w http.ResponseWriter, _ *http.Request) {
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nodes := s.forkChoiceStore.Nodes()
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graph := dot.NewGraph(dot.Directed)
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graph.Attr("rankdir", "RL")
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graph.Attr("labeljust", "l")
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dotNodes := make([]*dot.Node, len(nodes))
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for i := len(nodes) - 1; i >= 0; i-- {
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// Construct label for each node.
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slot := strconv.Itoa(int(nodes[i].Slot))
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weight := strconv.Itoa(int(nodes[i].Weight / 10e9))
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bestDescendent := strconv.Itoa(int(nodes[i].BestDescendent))
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index := strconv.Itoa(int(i))
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label := "slot: " + slot + "\n index: " + index + "\n bestDescendent: " + bestDescendent + "\n weight: " + weight
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var dotN dot.Node
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if nodes[i].Parent != ^uint64(0) {
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dotN = graph.Node(index).Box().Attr("label", label)
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}
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dotNodes[i] = &dotN
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}
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for i := len(nodes) - 1; i >= 0; i-- {
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if nodes[i].Parent != ^uint64(0) && nodes[i].Parent < uint64(len(dotNodes)) {
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graph.Edge(*dotNodes[i], *dotNodes[nodes[i].Parent])
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}
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}
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w.WriteHeader(http.StatusOK)
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w.Header().Set("Content-Type", "text/html")
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if _, err := fmt.Fprintf(w, template, graph.String()); err != nil {
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log.WithError(err).Error("Failed to render p2p info page")
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}
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}
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// This returns the latest head slots in a slice and up to latestSlotCount
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func (s *Service) latestHeadSlots() []int {
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slots := make([]int, 0, len(s.canonicalRoots))
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for k := range s.canonicalRoots {
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slots = append(slots, int(k))
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}
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sort.Ints(slots)
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if (len(slots)) > latestSlotCount {
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return slots[len(slots)-latestSlotCount:]
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}
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return slots
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}
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