187 lines
6.7 KiB
Go
187 lines
6.7 KiB
Go
package display
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import (
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"fmt"
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"html"
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"net"
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"os"
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"sort"
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"strings"
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"time"
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)
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type NetworkInterfaceState struct {
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Name string `json:"name"`
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Index int `json:"index"`
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MTU int `json:"mtu"`
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HardwareAddr string `json:"hardware_addr,omitempty"`
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Flags []string `json:"flags,omitempty"`
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Addresses []string `json:"addresses,omitempty"`
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Up bool `json:"up"`
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Loopback bool `json:"loopback"`
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}
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type NetworkState struct {
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Hostname string `json:"hostname"`
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Interfaces []NetworkInterfaceState `json:"interfaces"`
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ObservedAt time.Time `json:"observed_at"`
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}
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func (s *Service) networkState() NetworkState {
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state := NetworkState{
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Hostname: hostname(),
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Interfaces: make([]NetworkInterfaceState, 0),
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ObservedAt: time.Now().UTC(),
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}
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interfaces, err := net.Interfaces()
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if err != nil {
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return state
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}
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sort.Slice(interfaces, func(i, j int) bool {
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return strings.ToLower(interfaces[i].Name) < strings.ToLower(interfaces[j].Name)
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})
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for _, iface := range interfaces {
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addresses := make([]string, 0)
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if addrs, err := iface.Addrs(); err == nil {
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for _, addr := range addrs {
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addresses = append(addresses, addr.String())
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}
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sort.Strings(addresses)
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}
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state.Interfaces = append(state.Interfaces, NetworkInterfaceState{
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Name: iface.Name,
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Index: iface.Index,
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MTU: iface.MTU,
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HardwareAddr: iface.HardwareAddr.String(),
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Flags: interfaceFlags(iface.Flags),
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Addresses: addresses,
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Up: iface.Flags&net.FlagUp != 0,
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Loopback: iface.Flags&net.FlagLoopback != 0,
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})
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}
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return state
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}
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func (s *Service) renderNetworkPage(state NetworkState) string {
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var builder strings.Builder
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builder.WriteString("<!doctype html><html><head><meta charset=\"utf-8\"><title>core://network</title><style>")
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builder.WriteString("body{font:14px/1.5 ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,\"Segoe UI\",sans-serif;background:#07111f;color:#e2e8f0;margin:0}")
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builder.WriteString("header{padding:20px;border-bottom:1px solid #203047;background:linear-gradient(180deg,#0f172a,#07111f)}")
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builder.WriteString("main{padding:20px;display:grid;gap:16px}section{background:#0b1220;border:1px solid #203047;border-radius:16px;padding:16px}")
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builder.WriteString("ul{list-style:none;padding:0;margin:0;display:grid;gap:12px}.iface{padding:12px;border:1px solid #203047;border-radius:12px;background:#020617}")
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builder.WriteString(".meta{color:#94a3b8}.name{font-weight:700;color:#7dd3fc}code{background:#111827;border-radius:8px;padding:2px 6px}")
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builder.WriteString("</style></head><body><header><strong>core://network</strong><div class=\"meta\">")
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builder.WriteString(html.EscapeString(state.Hostname))
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builder.WriteString(" · ")
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builder.WriteString(html.EscapeString(state.ObservedAt.Format(time.RFC3339)))
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builder.WriteString("</div></header><main><section><ul>")
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if len(state.Interfaces) == 0 {
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builder.WriteString("<li class=\"meta\">No network interfaces were detected.</li>")
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} else {
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for _, iface := range state.Interfaces {
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builder.WriteString("<li class=\"iface\"><div class=\"name\">")
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builder.WriteString(html.EscapeString(iface.Name))
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builder.WriteString("</div><div class=\"meta\">Index ")
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builder.WriteString(fmt.Sprintf("%d", iface.Index))
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builder.WriteString(" · MTU ")
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builder.WriteString(fmt.Sprintf("%d", iface.MTU))
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builder.WriteString(" · ")
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if iface.Up {
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builder.WriteString("up")
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} else {
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builder.WriteString("down")
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}
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if iface.Loopback {
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builder.WriteString(" · loopback")
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}
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builder.WriteString("</div>")
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if len(iface.Addresses) > 0 {
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builder.WriteString("<pre>")
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builder.WriteString(html.EscapeString(strings.Join(iface.Addresses, "\n")))
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builder.WriteString("</pre>")
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}
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builder.WriteString("</li>")
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}
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}
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builder.WriteString("</ul></section></main></body></html>")
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return builder.String()
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}
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func (s *Service) renderNetworkInterfacePage(state NetworkState, iface NetworkInterfaceState) string {
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var builder strings.Builder
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builder.WriteString("<!doctype html><html><head><meta charset=\"utf-8\"><title>core://network/")
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builder.WriteString(html.EscapeString(iface.Name))
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builder.WriteString("</title><style>")
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builder.WriteString("body{font:14px/1.5 ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,\"Segoe UI\",sans-serif;background:#07111f;color:#e2e8f0;margin:0}")
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builder.WriteString("header{padding:20px;border-bottom:1px solid #203047;background:linear-gradient(180deg,#0f172a,#07111f)}")
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builder.WriteString("main{padding:20px;display:grid;gap:16px}section{background:#0b1220;border:1px solid #203047;border-radius:16px;padding:16px}")
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builder.WriteString("pre{margin:0;white-space:pre-wrap;word-break:break-word}code{background:#111827;border-radius:8px;padding:2px 6px}")
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builder.WriteString(".meta{color:#94a3b8}.name{font-weight:700;color:#7dd3fc}")
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builder.WriteString("</style></head><body><header><strong>core://network/")
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builder.WriteString(html.EscapeString(iface.Name))
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builder.WriteString("</strong><div class=\"meta\">")
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builder.WriteString(html.EscapeString(state.Hostname))
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builder.WriteString("</div></header><main><section><div class=\"name\">")
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builder.WriteString(html.EscapeString(iface.Name))
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builder.WriteString("</div><div class=\"meta\">Index ")
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builder.WriteString(fmt.Sprintf("%d", iface.Index))
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builder.WriteString(" · MTU ")
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builder.WriteString(fmt.Sprintf("%d", iface.MTU))
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builder.WriteString(" · ")
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if iface.Up {
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builder.WriteString("up")
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} else {
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builder.WriteString("down")
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}
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if iface.Loopback {
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builder.WriteString(" · loopback")
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}
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builder.WriteString("</div><pre>")
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builder.WriteString(html.EscapeString(strings.Join(iface.Addresses, "\n")))
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builder.WriteString("</pre><div class=\"meta\">Flags: ")
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if len(iface.Flags) == 0 {
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builder.WriteString("none")
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} else {
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builder.WriteString(html.EscapeString(strings.Join(iface.Flags, ", ")))
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}
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builder.WriteString("</div></section></main></body></html>")
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return builder.String()
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}
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func interfaceFlags(flags net.Flags) []string {
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values := make([]string, 0, 4)
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if flags&net.FlagUp != 0 {
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values = append(values, "up")
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}
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if flags&net.FlagBroadcast != 0 {
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values = append(values, "broadcast")
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}
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if flags&net.FlagLoopback != 0 {
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values = append(values, "loopback")
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}
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if flags&net.FlagPointToPoint != 0 {
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values = append(values, "point-to-point")
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}
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if flags&net.FlagMulticast != 0 {
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values = append(values, "multicast")
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}
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if flags&net.FlagRunning != 0 {
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values = append(values, "running")
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}
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return values
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}
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func hostname() string {
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name, err := os.Hostname()
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if err != nil || strings.TrimSpace(name) == "" {
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return "localhost"
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}
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return name
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}
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