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Ampera 2023-03-07 19:24:15 -05:00
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## Ignore Visual Studio temporary files, build results, and
## files generated by popular Visual Studio add-ons.
##
## Get latest from https://github.com/github/gitignore/blob/main/VisualStudio.gitignore
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# in these scripts will be unencrypted
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##
## Visual studio for Mac
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# Windows shortcuts
*.lnk

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{
"version": "0.2.0",
"configurations": [
{
"name": ".NET Core Launch (console)",
"type": "coreclr",
"request": "launch",
"preLaunchTask": "build",
"program": "${workspaceFolder}/OpenWiki.Utils.MwCfPurge/bin/Debug/net6.0/OpenWiki.Utils.MwCfPurge.dll",
"args": [],
"cwd": "${workspaceFolder}",
"console": "externalTerminal",
"stopAtEntry": false
},
{
"name": ".NET Core Attach",
"type": "coreclr",
"request": "attach"
}
]
}

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{
"version": "2.0.0",
"tasks": [
{
"label": "build",
"command": "dotnet",
"type": "process",
"args": [
"build",
"${workspaceFolder}/OpenWiki.Utils.MwCfPurge/OpenWiki.Utils.MwCfPurge.csproj",
"/property:GenerateFullPaths=true",
"/consoleloggerparameters:NoSummary"
],
"problemMatcher": "$msCompile"
},
]
}

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<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<OutputType>Exe</OutputType>
<TargetFramework>net6.0</TargetFramework>
</PropertyGroup>
</Project>

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using System;
using System.Collections.Generic;
using System.Net;
using System.IO;
using System.Text.Json;
namespace OpenWiki.Utils.MwCfPurge{
public static class Program{
public static int Main(string[] args){
if(args.Length > 0){
SettingsFile = args[0];
SettingsDir = null;
}
if(!CheckCreateSettings()){
return 1;
}
Settings settings = Settings.Load(SettingsFile);
PurgeLoop.Settings = settings;
HttpListener listener = new HttpListener();
listener.Prefixes.Add($"http://*:{settings.Port}/");
listener.Start();
PurgeLoop.EnableLoop();
while(true){
HttpListenerContext ctx = listener.GetContext();
if(ctx.Request.HttpMethod == "PURGE"){
lock(PurgeLoop.Queue){
string url = ctx.Request.RawUrl;
//A hack, since mediawiki sends URLs according to wgInternalServer, not the actual server.
url = url.Replace("http://", "");
url = "https://" + url;
PurgeLoop.Queue.Add(url);
#if DEBUG
Console.WriteLine($"PURGE {url}");
#endif
}
}else{
Console.WriteLine($"Warning: received unexpected request of type {ctx.Request.HttpMethod}");
}
ctx.Response.StatusCode = 200; //OK
ctx.Response.OutputStream.Close();
}
}
public static string SettingsDir = Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData) + "/mwcfpurge";
public static string SettingsFile = SettingsDir + "/settings.json";
public static bool CheckCreateSettings(){
if(SettingsDir != null && !Directory.Exists(SettingsDir)){
try{
Directory.CreateDirectory(SettingsDir);
}catch(Exception ex){
Console.WriteLine($"Exception thrown when creating SettingsDir {SettingsDir}:\n{ex.Message}\n");
return false;
}
}
if(!File.Exists(SettingsFile)){
try{
new Settings().Write(SettingsFile);
}catch(Exception ex){
Console.WriteLine($"Exception thrown when creating SettingsFile {SettingsFile}:\n{ex.Message}\n");
return false;
}
}
return true;
}
}
public class Settings{
public Dictionary<string, string> ZoneUrlMap {get; set;} = new Dictionary<string, string>();
public string Token {get; set;} = "";
public ushort Port {get; set;} = 5000;
public void Write(string file){
using(Stream stream = File.Open(file, FileMode.Create)){
JsonSerializer.Serialize(stream, this, new JsonSerializerOptions{WriteIndented = true});
}
}
public static Settings Load(string file){
using(FileStream stream = File.OpenRead(file)){
return JsonSerializer.Deserialize<Settings>(stream);
}
}
}
}

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using System;
using System.Timers;
using System.Collections.Generic;
using System.Threading.Tasks;
using System.Net.Http;
using System.Text.Json;
using System.Linq;
namespace OpenWiki.Utils.MwCfPurge{
public static class PurgeLoop{
public static List<string> Queue = new List<string>();
public static Timer LoopTimer;
public static int Interval = 15000;
public static int MaxPerInterval = 200;
public static Settings Settings;
public static void EnableLoop(){
LoopTimer = new Timer();
LoopTimer.Interval = Interval;
LoopTimer.Elapsed += Loop;
LoopTimer.AutoReset = true;
LoopTimer.Enabled = true;
}
public static async void Loop(object sender, ElapsedEventArgs args){
List<string> payload = new List<string>();
lock(Queue){
if(Queue.Count <= MaxPerInterval){
payload = new List<string>(Queue);
Queue.Clear();
}else{
payload.AddRange(payload.GetRange(0, MaxPerInterval));
Queue.RemoveRange(0, MaxPerInterval);
}
}
foreach(KeyValuePair<string, string> zone in Settings.ZoneUrlMap){
//Get all the URLs for which this zone matches
List<string> zonePayload = payload.Where(p => new Uri(p).DnsSafeHost.Contains(zone.Key)).ToList();
if(zonePayload.Count < 1) continue;
try{
#if DEBUG
Console.WriteLine($"Purging:");
zonePayload.ForEach(zp => Console.WriteLine(zp));
#endif
HttpClient client = GetDynamicClient();
PayloadModel model = new PayloadModel(zonePayload);
var response = await client.PostAsync($"https://api.cloudflare.com/client/v4/zones/{zone.Value}/purge_cache", new StringContent(JsonSerializer.Serialize(model)));
if(response.StatusCode != System.Net.HttpStatusCode.OK) throw new Exception($"Threw response code of {response.StatusCode}");
}catch(Exception ex){
Console.WriteLine("Exception thrown when posting queue:\n" + ex.Message + "\n");
}
}
}
public static DateTimeOffset ClientAge = DateTimeOffset.MinValue;
public static TimeSpan MaxAge = TimeSpan.FromMinutes(30);
private static HttpClient HttpClient = null;
public static HttpClient GetDynamicClient(){
if(DateTimeOffset.Now.Subtract(ClientAge) > MaxAge || HttpClient == null){
HttpClient = new HttpClient();
HttpClient.DefaultRequestHeaders.Add("Authorization", $"Bearer {Settings.Token}");
}
return HttpClient;
}
}
public class PayloadModel{
public List<String> files {get; set;}
public PayloadModel(List<String> _files){
files = _files;
}
}
}