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import type { APIRoute } from 'astro';
export const prerender = false;
interface CloudflareEnv {
BASE_URL: string;
AUTH_USER: string;
AUTH_PASS: string;
BUCKET_NAME: string;
SCHEDULED?: boolean;
[key: string]: any;
}
class GeshemUpdate {
private bucket: R2Bucket;
private env: CloudflareEnv;
constructor(bucket: R2Bucket, env: CloudflareEnv) {
this.bucket = bucket;
this.env = env;
}
private async authenticate(request: Request): Promise<Request> {
const headers = new Headers(request.headers);
const credentials = btoa(`${this.env.AUTH_USER}:${this.env.AUTH_PASS}`);
headers.set('Authorization', `Basic ${credentials}`);
return new Request(request.url, {
method: request.method,
headers,
body: request.body
});
}
private async getLatestImages(): Promise<string[]> {
const authenticatedRequest = await this.authenticate(new Request(this.env.BASE_URL));
const response = await fetch(authenticatedRequest);
const html = await response.text();
const regex = /radar280comp_\d+\.png/g;
const matches = html.match(regex) || [];
const uniqueImages = [...new Set(matches)];
return uniqueImages.sort().slice(-10);
}
private async getLatestBucketKeys(): Promise<string[]> {
const yesterday = new Date();
yesterday.setDate(yesterday.getDate() - 1);
const yesterdayStr = yesterday.toISOString().slice(0, 10).replace(/-/g, '');
try {
const objects = await this.bucket.list({
prefix: 'imgs/',
startAfter: `imgs/${yesterdayStr}`
});
return objects.objects.map(obj => obj.key);
} catch (error) {
console.error('Error listing bucket objects:', error);
return [];
}
}
private async fetchMissingImages(): Promise<boolean> {
const images = await this.getLatestImages();
const s3Images = await this.getLatestBucketKeys();
let updated = false;
for (const img of images) {
const key = this.keyFromFilename(img);
if (!s3Images.includes(key)) {
await this.fetchImage(img, key);
updated = true;
}
}
return updated;
}
private async fetchImage(imgName: string, key: string): Promise<void> {
console.log(`Downloading ${imgName} from web server`);
const imageUrl = `${this.env.BASE_URL}/${imgName}`;
const authenticatedRequest = await this.authenticate(new Request(imageUrl));
const response = await fetch(authenticatedRequest);
if (!response.ok) {
throw new Error(`Failed to fetch image: ${response.statusText}`);
}
const imageData = await response.arrayBuffer();
console.log(`Uploading to ${key}`);
await this.bucket.put(key, imageData, {
httpMetadata: {
contentType: 'image/png',
cacheControl: 'public, max-age=31536000'
}
});
}
private keyFromFilename(filename: string): string {
const [name, dateStr] = filename.split('.')[0].split('_');
const res = 280;
// Parse date: YYYYMMDDHHMM
const year = dateStr.slice(0, 4);
const month = dateStr.slice(4, 6);
const day = dateStr.slice(6, 8);
const hour = dateStr.slice(8, 10);
const minute = dateStr.slice(10, 12);
const d = `${year}${month}${day}`;
const t = `${hour}${minute}`;
return `imgs/${d}/${t}/${res}.png`;
}
async run(): Promise<string> {
try {
const updated = await this.fetchMissingImages();
return `Updated: ${updated}`;
} catch (error) {
console.error('Error in GeshemUpdate.run():', error);
throw error;
}
}
}
export const GET: APIRoute = async ({ locals, request }) => {
// This endpoint should only be accessible via Cloudflare Cron
const cron = request.headers.get('CF-Cron');
if (!cron) {
return new Response('Unauthorized', { status: 401 });
}
try {
const env = (locals as any).runtime?.env as unknown as CloudflareEnv;
if (!env?.BASE_URL || !env?.AUTH_USER || !env?.AUTH_PASS) {
return new Response('Missing environment variables', { status: 500 });
}
// Get R2 bucket (this would be configured in your Cloudflare Workers environment)
const bucket = env.BUCKET_NAME ? env[env.BUCKET_NAME] as R2Bucket : null;
if (!bucket) {
return new Response('R2 bucket not configured', { status: 500 });
}
const updater = new GeshemUpdate(bucket, env);
const result = await updater.run();
return new Response(JSON.stringify({
message: `SUCCESS: ${result}`,
timestamp: new Date().toISOString()
}), {
status: 200,
headers: {
'Content-Type': 'application/json'
}
});
} catch (error) {
console.error('Error in update handler:', error);
return new Response(JSON.stringify({
message: 'ERROR',
error: error instanceof Error ? error.message : 'Unknown error'
}), {
status: 500,
headers: {
'Content-Type': 'application/json'
}
});
}
};
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