first init

This commit is contained in:
Thomas Peterson 2026-05-18 15:24:46 +02:00
commit 6c29ab88e8
9 changed files with 1407 additions and 0 deletions

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[package]
name = "mini-inventory"
version = "0.1.0"
edition = "2024"
[dependencies]
anyhow = "1.0"
axum = "0.8"
serde = { version = "1.0", features = ["derive"] }
serde_json = "1.0"
tokio = { version = "1.0", features = ["fs", "macros", "net", "rt-multi-thread"] }
toml = "0.9"

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README.md Normal file
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# Mini Inventory
Kleine Rust-Webanwendung fuer eine Windows-Domaene. Der Server liest JSON-Dateien aus einem lokalen Ordner, zeigt Computer und installierte Software an und kann Wake-on-LAN-Pakete senden.
## Ordnerstruktur
```text
D:\Inventory\
├─ mini-inventory.exe
├─ config.toml
└─ clients\
├─ PC-001.json
├─ PC-002.json
└─ PC-003.json
```
## Konfiguration
```toml
bind_address = "0.0.0.0:8080"
clients_dir = "clients"
wol_broadcast = "255.255.255.255:9"
```
`clients_dir` ist relativ zum Arbeitsverzeichnis der EXE, wenn kein absoluter Pfad angegeben wird.
## Start
```powershell
.\mini-inventory.exe
```
Danach ist die Weboberflaeche unter `http://server-name:8080` erreichbar.
## Windows-Build
Auf einem Windows-Rechner mit Rust:
```powershell
cargo build --release
```
Die Binary liegt danach unter:
```text
target\release\mini-inventory.exe
```
## Client-JSON
Die Dateien muessen die Feldnamen im PowerShell-/Windows-Stil enthalten:
```json
{
"ComputerName": "PC-001",
"User": "FIRMA\\max.mustermann",
"IPAddress": "192.168.178.51",
"MacAddress": "00-11-22-33-44-55",
"LastSeen": "2026-05-18 10:15:00",
"Software": [
{
"Name": "JTL-Wawi",
"Version": "2.0.3"
}
]
}
```

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param(
[string]$ServerUrl = "http://192.168.178.24:8080"
)
$ComputerName = $env:COMPUTERNAME
$User = [System.Security.Principal.WindowsIdentity]::GetCurrent().Name
$IPAddress = (Get-NetIPAddress -AddressFamily IPv4 -InterfaceAlias "Ethernet*", "Wi-Fi*" | Select-Object -First 1).IPAddress
$MacAddress = (Get-NetAdapter | Where-Object { $_.Status -eq 'Up' } | Select-Object -First 1).MacAddress
$LastSeen = Get-Date -Format "yyyy-MM-dd HH:mm:ss"
# Get installed software from registry (32 and 64 bit)
$Software = @()
$RegistryPaths = @(
"HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\*",
"HKLM:\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Uninstall\*",
"HKCU:\Software\Microsoft\Windows\CurrentVersion\Uninstall\*"
)
foreach ($Path in $RegistryPaths) {
Get-ItemProperty $Path -ErrorAction SilentlyContinue | Where-Object { $_.DisplayName -ne $null } | ForEach-Object {
$Software += @{
Name = $_.DisplayName
Version = $_.DisplayVersion
}
}
}
# Unique list and sort
$Software = $Software | Sort-Object Name -Unique
$Inventory = @{
ComputerName = $ComputerName
User = $User
IPAddress = $IPAddress
MacAddress = $MacAddress
LastSeen = $LastSeen
Software = $Software
}
$Json = $Inventory | ConvertTo-Json -Depth 10
try {
Invoke-RestMethod -Uri "$ServerUrl/inventory" -Method Post -Body $Json -ContentType "application/json"
Write-Host "Inventory sent successfully to $ServerUrl"
} catch {
Write-Error "Failed to send inventory: $_"
}

58
agent.wxs Normal file
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<?xml version="1.0" encoding="UTF-8"?>
<Wix xmlns="http://schemas.microsoft.com/wix/2006/wi" xmlns:util="http://schemas.microsoft.com/wix/UtilExtension" xmlns:sched="http://schemas.microsoft.com/wix/SchedExtension">
<Product Id="*" Name="PC Inventory Agent" Language="1031" Version="1.0.0.0" Manufacturer="PC Inventory" UpgradeCode="7e3b8a1c-8b2d-4f1e-9c3a-5d6e7f8a9b0c">
<Package InstallerVersion="200" Compressed="yes" InstallScope="perMachine" />
<MajorUpgrade DowngradeErrorMessage="Eine neuere Version von [ProductName] ist bereits installiert." />
<MediaTemplate EmbedCab="yes" />
<Property Id="SERVERURL" Value="http://localhost:8080" />
<Feature Id="ProductFeature" Title="PC Inventory Agent" Level="1">
<ComponentGroupRef Id="ProductComponents" />
<ComponentRef Id="ScheduledTaskComponent" />
</Feature>
<Directory Id="TARGETDIR" Name="SourceDir">
<Directory Id="ProgramFilesFolder">
<Directory Id="INSTALLFOLDER" Name="PCInventoryAgent" />
</Directory>
</Directory>
<ComponentGroup Id="ProductComponents" Directory="INSTALLFOLDER">
<Component Id="AgentScript" Guid="a1b2c3d4-e5f6-4a5b-bc6d-7e8f9a0b1c2d">
<File Id="AgentPs1" Source="agent.ps1" KeyPath="yes" />
</Component>
</ComponentGroup>
<DirectoryRef Id="TARGETDIR">
<Component Id="ScheduledTaskComponent" Guid="f1e2d3c4-b5a6-4987-8765-43210fedcba9">
<util:ServiceConfig
ServiceName="PCInventoryAgentTask"
FirstFailureActionType="restart"
SecondFailureActionType="restart"
ThirdFailureActionType="runCommand" />
<!-- We use a custom action to create the scheduled task because WiX 3 doesn't have a native element for Task Scheduler 2.0 -->
<CustomAction Id="CreateScheduledTask"
Directory="INSTALLFOLDER"
ExeCommand='schtasks /Create /TN "PCInventoryAgent" /SC HOURLY /ST 00:00 /TR "powershell.exe -ExecutionPolicy Bypass -File \"[INSTALLFOLDER]agent.ps1\" -ServerUrl \"[SERVERURL]\"" /RU "System" /F'
Return="check"
Execute="deferred"
Impersonate="no" />
<CustomAction Id="RemoveScheduledTask"
Directory="INSTALLFOLDER"
ExeCommand='schtasks /Delete /TN "PCInventoryAgent" /F'
Return="ignore"
Execute="deferred"
Impersonate="no" />
<InstallExecuteSequence>
<Custom Action="CreateScheduledTask" Before="InstallFinalize">NOT Removed</Custom>
<Custom Action="RemoveScheduledTask" Before="RemoveFiles">Removed</Custom>
</InstallExecuteSequence>
</Component>
</DirectoryRef>
</Product>
</Wix>

17
clients/PC-001.json Normal file
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{
"ComputerName": "PC-001",
"User": "FIRMA\\max.mustermann",
"IPAddress": "192.168.178.51",
"MacAddress": "00-11-22-33-44-55",
"LastSeen": "2026-05-18 10:15:00",
"Software": [
{
"Name": "JTL-Wawi",
"Version": "2.0.3"
},
{
"Name": "Slack",
"Version": "4.44.60"
}
]
}

3
config.toml Normal file
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bind_address = "0.0.0.0:8080"
clients_dir = "clients"
wol_broadcast = "255.255.255.255:9"

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src/main.rs Normal file
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use std::{
net::SocketAddr,
path::{Path, PathBuf},
sync::Arc,
};
use anyhow::{Context, Result, bail};
use axum::{
Form, Router,
extract::State,
http::StatusCode,
response::{Html, IntoResponse},
routing::{get, post},
};
use serde::{Deserialize, Serialize};
use tokio::{fs, net::UdpSocket};
#[derive(Clone, Debug, Deserialize)]
struct Config {
#[serde(default = "default_bind_address")]
bind_address: SocketAddr,
#[serde(default = "default_clients_dir")]
clients_dir: PathBuf,
#[serde(default = "default_wol_broadcast")]
wol_broadcast: SocketAddr,
}
#[derive(Clone)]
struct AppState {
config: Config,
}
#[derive(Clone, Debug, Deserialize, Serialize)]
#[serde(rename_all = "PascalCase")]
struct ClientInventory {
computer_name: String,
user: Option<String>,
#[serde(rename = "IPAddress")]
ip_address: Option<String>,
mac_address: Option<String>,
last_seen: Option<String>,
#[serde(default)]
software: Vec<SoftwareEntry>,
}
#[derive(Clone, Debug, Deserialize, Serialize)]
#[serde(rename_all = "PascalCase")]
struct SoftwareEntry {
name: String,
version: Option<String>,
}
#[derive(Debug)]
struct InventoryLoadError {
path: PathBuf,
message: String,
}
#[derive(Debug, Deserialize)]
struct WakeForm {
computer_name: String,
}
#[tokio::main]
async fn main() -> Result<()> {
let config = load_config("config.toml").await?;
let bind_address = config.bind_address;
// Ensure clients directory exists
if !config.clients_dir.exists() {
fs::create_dir_all(&config.clients_dir).await?;
println!("Created clients directory: {}", config.clients_dir.display());
}
let state = Arc::new(AppState { config });
let app = Router::new()
.route("/", get(index))
.route("/wake", post(wake))
.route("/inventory", post(receive_inventory))
.route("/styles.css", get(styles))
.with_state(state);
println!("mini-inventory listening on http://{bind_address}");
let listener = tokio::net::TcpListener::bind(bind_address)
.await
.with_context(|| format!("failed to bind to {bind_address}"))?;
axum::serve(listener, app).await?;
Ok(())
}
async fn load_config(path: impl AsRef<Path>) -> Result<Config> {
let path = path.as_ref();
let content = fs::read_to_string(path)
.await
.with_context(|| format!("failed to read {}", path.display()))?;
toml::from_str(&content).with_context(|| format!("failed to parse {}", path.display()))
}
async fn index(State(state): State<Arc<AppState>>) -> impl IntoResponse {
match render_inventory_page(&state.config, None).await {
Ok(html) => Html(html).into_response(),
Err(error) => (
StatusCode::INTERNAL_SERVER_ERROR,
Html(render_error_page(
"Inventar konnte nicht geladen werden",
&error.to_string(),
)),
)
.into_response(),
}
}
async fn wake(State(state): State<Arc<AppState>>, Form(form): Form<WakeForm>) -> impl IntoResponse {
let inventories = match load_inventories(&state.config.clients_dir).await {
Ok((inventories, _errors)) => inventories,
Err(error) => {
return (
StatusCode::INTERNAL_SERVER_ERROR,
Html(render_error_page(
"Wake-on-LAN konnte nicht vorbereitet werden",
&error.to_string(),
)),
)
.into_response();
}
};
let result = inventories
.iter()
.find(|client| client.computer_name == form.computer_name)
.and_then(|client| client.mac_address.as_deref().map(|mac| (client, mac)));
let message = match result {
Some((client, mac)) => match send_wake_on_lan(mac, state.config.wol_broadcast).await {
Ok(()) => format!(
"Wake-on-LAN-Paket fuer {} wurde gesendet.",
client.computer_name
),
Err(error) => format!(
"Wake-on-LAN fuer {} fehlgeschlagen: {error}",
client.computer_name
),
},
None => format!(
"Kein Computer mit MAC-Adresse fuer {} gefunden.",
form.computer_name
),
};
match render_inventory_page(&state.config, Some(&message)).await {
Ok(html) => Html(html).into_response(),
Err(error) => (
StatusCode::INTERNAL_SERVER_ERROR,
Html(render_error_page(
"Inventar konnte nicht geladen werden",
&error.to_string(),
)),
)
.into_response(),
}
}
async fn receive_inventory(
State(state): State<Arc<AppState>>,
axum::Json(inventory): axum::Json<ClientInventory>,
) -> impl IntoResponse {
let file_name = format!("{}.json", inventory.computer_name);
let path = state.config.clients_dir.join(file_name);
match serde_json::to_string_pretty(&inventory) {
Ok(json) => match fs::write(&path, json).await {
Ok(()) => StatusCode::OK,
Err(error) => {
eprintln!("Failed to write inventory to {}: {}", path.display(), error);
StatusCode::INTERNAL_SERVER_ERROR
}
},
Err(error) => {
eprintln!("Failed to serialize inventory: {}", error);
StatusCode::INTERNAL_SERVER_ERROR
}
}
}
async fn styles() -> impl IntoResponse {
(
[("content-type", "text/css; charset=utf-8")],
r#"
:root {
color-scheme: light;
font-family: "Segoe UI", Arial, sans-serif;
background: #f5f7fa;
color: #1c2530;
}
* {
box-sizing: border-box;
}
body {
margin: 0;
}
header {
background: #182535;
color: #fff;
padding: 24px clamp(16px, 4vw, 48px);
}
header h1 {
margin: 0;
font-size: clamp(1.5rem, 3vw, 2.1rem);
letter-spacing: 0;
}
header p {
margin: 8px 0 0;
color: #c8d3df;
}
main {
width: min(1180px, calc(100% - 32px));
margin: 24px auto 48px;
}
.flash {
border-left: 4px solid #1f7a4d;
background: #eaf6ef;
padding: 12px 14px;
margin-bottom: 16px;
}
.error-list {
border-left: 4px solid #b42318;
background: #fff1f0;
padding: 12px 14px;
margin-bottom: 16px;
}
.summary {
display: flex;
gap: 12px;
flex-wrap: wrap;
margin-bottom: 16px;
}
.summary div {
background: #fff;
border: 1px solid #d8e0e8;
border-radius: 8px;
padding: 12px 14px;
min-width: 160px;
}
.summary strong {
display: block;
font-size: 1.4rem;
}
.client {
background: #fff;
border: 1px solid #d8e0e8;
border-radius: 8px;
margin-bottom: 14px;
overflow: hidden;
}
.client-head {
display: grid;
grid-template-columns: minmax(160px, 1fr) repeat(4, minmax(130px, auto)) auto;
gap: 12px;
align-items: center;
padding: 14px;
border-bottom: 1px solid #e5ebf1;
}
.computer {
font-weight: 700;
font-size: 1.05rem;
}
.label {
display: block;
color: #607084;
font-size: .78rem;
margin-bottom: 2px;
}
.value {
word-break: break-word;
}
button {
border: 0;
border-radius: 6px;
background: #0f6cbd;
color: #fff;
cursor: pointer;
font: inherit;
font-weight: 600;
padding: 10px 12px;
white-space: nowrap;
}
button:disabled {
background: #98a6b3;
cursor: not-allowed;
}
.software {
padding: 0 14px 14px;
}
.software h2 {
font-size: .95rem;
margin: 14px 0 8px;
}
table {
border-collapse: collapse;
width: 100%;
}
th,
td {
border-top: 1px solid #e5ebf1;
padding: 8px;
text-align: left;
}
th {
color: #607084;
font-weight: 600;
}
.empty {
color: #607084;
background: #fff;
border: 1px solid #d8e0e8;
border-radius: 8px;
padding: 24px;
}
@media (max-width: 900px) {
.client-head {
grid-template-columns: 1fr;
}
button {
width: 100%;
}
}
"#,
)
}
async fn render_inventory_page(config: &Config, flash: Option<&str>) -> Result<String> {
let (inventories, errors) = load_inventories(&config.clients_dir).await?;
let total_software: usize = inventories.iter().map(|client| client.software.len()).sum();
let mut html = String::new();
html.push_str("<!doctype html><html lang=\"de\"><head><meta charset=\"utf-8\">");
html.push_str("<meta name=\"viewport\" content=\"width=device-width, initial-scale=1\">");
html.push_str("<title>Mini Inventory</title><link rel=\"stylesheet\" href=\"/styles.css\">");
html.push_str("</head><body><header><h1>Mini Inventory</h1>");
html.push_str("<p>Windows-Clients, installierte Software und Wake-on-LAN</p>");
html.push_str("</header><main>");
if let Some(message) = flash {
html.push_str("<div class=\"flash\">");
html.push_str(&escape_html(message));
html.push_str("</div>");
}
if !errors.is_empty() {
html.push_str("<div class=\"error-list\"><strong>Einige Dateien konnten nicht gelesen werden.</strong><ul>");
for error in &errors {
html.push_str("<li>");
html.push_str(&escape_html(&format!(
"{}: {}",
error.path.display(),
error.message
)));
html.push_str("</li>");
}
html.push_str("</ul></div>");
}
html.push_str("<section class=\"summary\">");
html.push_str(&format!(
"<div><span class=\"label\">Computer</span><strong>{}</strong></div>",
inventories.len()
));
html.push_str(&format!(
"<div><span class=\"label\">Software-Eintraege</span><strong>{total_software}</strong></div>"
));
html.push_str(&format!(
"<div><span class=\"label\">Ordner</span><strong>{}</strong></div>",
escape_html(&config.clients_dir.display().to_string())
));
html.push_str("</section>");
if inventories.is_empty() {
html.push_str("<section class=\"empty\">Keine Client-Inventare gefunden.</section>");
}
for client in inventories {
html.push_str("<article class=\"client\"><div class=\"client-head\">");
html.push_str("<div><span class=\"label\">Computer</span><span class=\"computer\">");
html.push_str(&escape_html(&client.computer_name));
html.push_str("</span></div>");
append_meta(&mut html, "Benutzer", client.user.as_deref());
append_meta(&mut html, "IP-Adresse", client.ip_address.as_deref());
append_meta(&mut html, "MAC-Adresse", client.mac_address.as_deref());
append_meta(&mut html, "Zuletzt gesehen", client.last_seen.as_deref());
html.push_str("<form method=\"post\" action=\"/wake\">");
html.push_str("<input type=\"hidden\" name=\"computer_name\" value=\"");
html.push_str(&escape_html(&client.computer_name));
html.push_str("\">");
if client
.mac_address
.as_deref()
.unwrap_or("")
.trim()
.is_empty()
{
html.push_str("<button type=\"submit\" disabled>Wake-on-LAN</button>");
} else {
html.push_str("<button type=\"submit\">Wake-on-LAN</button>");
}
html.push_str("</form></div><div class=\"software\"><h2>Installierte Software</h2>");
if client.software.is_empty() {
html.push_str("<p class=\"value\">Keine Software gemeldet.</p>");
} else {
html.push_str("<table><thead><tr><th>Name</th><th>Version</th></tr></thead><tbody>");
for software in client.software {
html.push_str("<tr><td>");
html.push_str(&escape_html(&software.name));
html.push_str("</td><td>");
html.push_str(&escape_html(software.version.as_deref().unwrap_or("-")));
html.push_str("</td></tr>");
}
html.push_str("</tbody></table>");
}
html.push_str("</div></article>");
}
html.push_str("</main></body></html>");
Ok(html)
}
async fn load_inventories(
clients_dir: &Path,
) -> Result<(Vec<ClientInventory>, Vec<InventoryLoadError>)> {
let mut inventories = Vec::new();
let mut errors = Vec::new();
let mut entries = fs::read_dir(clients_dir)
.await
.with_context(|| format!("failed to read clients directory {}", clients_dir.display()))?;
while let Some(entry) = entries.next_entry().await? {
let path = entry.path();
if !path
.extension()
.and_then(|extension| extension.to_str())
.is_some_and(|extension| extension.eq_ignore_ascii_case("json"))
{
continue;
}
match load_inventory(&path).await {
Ok(inventory) => inventories.push(inventory),
Err(error) => errors.push(InventoryLoadError {
path,
message: error.to_string(),
}),
}
}
inventories.sort_by_key(|client| client.computer_name.to_ascii_lowercase());
Ok((inventories, errors))
}
async fn load_inventory(path: &Path) -> Result<ClientInventory> {
let content = fs::read_to_string(path)
.await
.with_context(|| format!("failed to read {}", path.display()))?;
serde_json::from_str(&content).with_context(|| format!("failed to parse {}", path.display()))
}
async fn send_wake_on_lan(mac_address: &str, broadcast: SocketAddr) -> Result<()> {
let mac = parse_mac_address(mac_address)?;
let mut packet = [0xff_u8; 102];
for chunk in packet[6..].chunks_exact_mut(6) {
chunk.copy_from_slice(&mac);
}
let socket = UdpSocket::bind("0.0.0.0:0").await?;
socket.set_broadcast(true)?;
socket.send_to(&packet, broadcast).await?;
Ok(())
}
fn parse_mac_address(mac_address: &str) -> Result<[u8; 6]> {
let hex: String = mac_address
.chars()
.filter(|character| character.is_ascii_hexdigit())
.collect();
if hex.len() != 12 {
bail!("ungueltige MAC-Adresse: {mac_address}");
}
let mut bytes = [0_u8; 6];
for (index, byte) in bytes.iter_mut().enumerate() {
let start = index * 2;
*byte = u8::from_str_radix(&hex[start..start + 2], 16)
.with_context(|| format!("ungueltige MAC-Adresse: {mac_address}"))?;
}
Ok(bytes)
}
fn append_meta(html: &mut String, label: &str, value: Option<&str>) {
html.push_str("<div><span class=\"label\">");
html.push_str(&escape_html(label));
html.push_str("</span><span class=\"value\">");
html.push_str(&escape_html(value.unwrap_or("-")));
html.push_str("</span></div>");
}
fn render_error_page(title: &str, message: &str) -> String {
format!(
"<!doctype html><html lang=\"de\"><head><meta charset=\"utf-8\"><title>{}</title><link rel=\"stylesheet\" href=\"/styles.css\"></head><body><main><section class=\"empty\"><h1>{}</h1><p>{}</p></section></main></body></html>",
escape_html(title),
escape_html(title),
escape_html(message)
)
}
fn escape_html(input: &str) -> String {
input
.replace('&', "&amp;")
.replace('<', "&lt;")
.replace('>', "&gt;")
.replace('"', "&quot;")
.replace('\'', "&#39;")
}
fn default_bind_address() -> SocketAddr {
"0.0.0.0:8080".parse().expect("valid default bind address")
}
fn default_clients_dir() -> PathBuf {
PathBuf::from("clients")
}
fn default_wol_broadcast() -> SocketAddr {
"255.255.255.255:9"
.parse()
.expect("valid default broadcast address")
}
#[cfg(test)]
mod tests {
use super::{ClientInventory, parse_mac_address};
#[test]
fn deserializes_client_inventory_powershell_field_names() {
let json = r#"{
"ComputerName": "PC-001",
"User": "FIRMA\\max.mustermann",
"IPAddress": "192.168.178.51",
"MacAddress": "00-11-22-33-44-55",
"LastSeen": "2026-05-18 10:15:00",
"Software": [{"Name": "JTL-Wawi", "Version": "2.0.3"}]
}"#;
let inventory: ClientInventory = serde_json::from_str(json).unwrap();
assert_eq!(inventory.computer_name, "PC-001");
assert_eq!(inventory.ip_address.as_deref(), Some("192.168.178.51"));
assert_eq!(inventory.mac_address.as_deref(), Some("00-11-22-33-44-55"));
assert_eq!(inventory.software[0].name, "JTL-Wawi");
}
#[test]
fn parses_common_mac_address_formats() {
assert_eq!(
parse_mac_address("00-11-22-33-44-55").unwrap(),
[0x00, 0x11, 0x22, 0x33, 0x44, 0x55]
);
assert_eq!(
parse_mac_address("00:11:22:33:44:55").unwrap(),
[0x00, 0x11, 0x22, 0x33, 0x44, 0x55]
);
assert_eq!(
parse_mac_address("001122334455").unwrap(),
[0x00, 0x11, 0x22, 0x33, 0x44, 0x55]
);
}
#[test]
fn rejects_invalid_mac_addresses() {
assert!(parse_mac_address("00-11-22").is_err());
assert!(parse_mac_address("not-a-mac").is_err());
}
}