Actually now it removes the list version and only doing sets, then it can glob many files to produce results.

02-filter-a-log-file/chains_parser.js

@@ -3,6 +3,23 @@ import assert from "assert";
 import UAParser from "ua-parser-js";
 import readline from "readline";
 import { program } from "commander";
+import glob from "fast-glob";
+
+
+program
+  .option("--min <Number>", "The lowest count to print. Stop at this.", 1)
+  .option("--errors", "Show the erorrs so you can fix them.", false)
+  .option("--format <string>", "Output format, text or json. Ignores min for raw output.", "json")
+  .option("--outfile <string>", "Save to file rather than stdout.")
+  .requiredOption("--domain <String>", "Domain for the log. Gets removed as a refer.")
+  .requiredOption("--input <String>", "Input file glob.")
+  .description("Processes different web server logs to determine request chain frequency.")
+  .version(0.1);
+
+program.parse();
+const OPTS = program.opts();
+OPTS.min = parseInt(OPTS.min);
+
 
 class Parser {
   constructor() {
@@ -139,7 +156,7 @@ class Parser {
   }
 }
 
-const parse_logs = async (file_name, errors) => {
+const parse_log_file = async (results, stats, file_name, errors) => {
   const read_stream = fs.createReadStream(file_name);
 
   const rl = readline.createInterface({
@@ -149,19 +166,8 @@ const parse_logs = async (file_name, errors) => {
 
   const parser = new Parser();
 
-  const stats = {
-    lines: 0,
-    chains: 0,
-    excluded: 0,
-    errors: 0,
-    roots: 0,
-    firsts: 0
-  };
-
   const skip = /(authcheck|.*\.svg|.*\.webmanifest|.*\.js|.*\.css|.*php|socket\.io|\.env|.*\.png|.*\.txt|.*\.woff|.*\.jpg|.*\.mp4|.*\.torrent|\-|.*\.ico|\/api\/.*\?.*|.*\.html|.*\.map|.*.php)/
 
-  const by_ip = {};
-
   for await (let line of rl) {
     try {
       stats.lines += 1;
@@ -173,40 +179,43 @@ const parse_logs = async (file_name, errors) => {
       if(data.url.match(skip)) continue;
 
       // store or update the chain in the by_ip chain
-      const ip_chain = by_ip[data.ip] || [];
+      const ip_chain = results[data.ip] || [];
 
       ip_chain.push(data);
 
-      by_ip[data.ip] = ip_chain;
+      results[data.ip] = ip_chain;
     } catch(error) {
       if(errors) console.error(error);
 
       stats.errors += 1;
     }
   }
-
-  return [by_ip, stats];
 }
 
-const chain_to_set = (requests) => {
-  const path = new Set();
+const parse_logs_glob = async (file_glob, errors) => {
+  const file_list = glob.sync(file_glob);
+  const results = {};
+  const stats = {
+    lines: 0,
+    chains: 0,
+    excluded: 0,
+    errors: 0,
+    roots: 0,
+    firsts: 0
+  };
 
-  for(let r of requests) {
-    path.add(r.url);
+  for(let file_name of file_list) {
+    await parse_log_file(results, stats, file_name, errors);
   }
 
-  return path.values();
+  return [results, stats];
 }
 
-const chain_to_list = (requests) => {
-  const path = [];
-  let seen;
+const chain_to_set = (requests) => {
+  const path = new Set();
 
   for(let r of requests) {
-    if(r.url != seen) {
-      path.push(r.url);
-      seen = r.url;
-    }
+    path.add(r.url);
   }
 
   return path.values();
@@ -221,11 +230,11 @@ const construct_url_set = (domain, ref, full_chain) => {
   }
 }
 
-const construct_request_chains = (by_ip, domain, as_set) => {
+const construct_request_chains = (by_ip, domain) => {
   let ip_chains = {};
 
   for(let [ip, requests] of Object.entries(by_ip)) {
-    const chain = as_set ? chain_to_set(requests) : chain_to_list(requests);
+    const chain = chain_to_set(requests);
 
     // record the initial refer to track entry to the site
     const ref = requests[0].refer;
@@ -294,33 +303,14 @@ const write_results = async (stats, chains, format, outfile) => {
   fs.closeSync(fd);
 }
 
-program
-  .option("--no-set", "Use a Set instead of a list for chains.")
-  .option("--min <Number>", "The lowest count to print. Stop at this.", 1)
-  .option("--errors", "Show the erorrs so you can fix them.", false)
-  .option("--format <string>", "Output format, text or json. Ignores min for raw output.", "json")
-  .option("--outfile <string>", "Save to file rather than stdout.")
-  .requiredOption("--domain <String>", "Domain for the log. Gets removed as a refer.")
-  .requiredOption("--input <String>", "Input file.")
-  .description("Processes different web server logs to determine request chain frequency.")
-  .version(0.1);
-
-program.parse();
-const OPTS = program.opts();
-OPTS.min = parseInt(OPTS.min);
 
 assert(!isNaN(OPTS.min), `min must be a number, you have ${OPTS.min}`);
 
-try {
-  const [by_ip, stats] = await parse_logs(OPTS.input, OPTS.errors);
-  const chains = construct_request_chains(by_ip, OPTS.domain, OPTS.set);
+const [by_ip, stats] = await parse_logs_glob(OPTS.input, OPTS.errors);
+const chains = construct_request_chains(by_ip, OPTS.domain);
 
 if(OPTS.outfile) {
   write_results(stats, chains, OPTS.format, OPTS.outfile);
 } else {
   output_results(stats, chains, OPTS.format, OPTS.outfile);
 }
-} catch(error) {
-  console.error(error.message);
-  process.exit(1);
-}

02-filter-a-log-file/package-lock.json

@@ -12,6 +12,7 @@
         "ava": "^4.3.1",
         "commander": "^9.4.0",
         "date-fns": "^2.29.1",
+        "fast-glob": "^3.2.11",
         "ua-parser-js": "^1.0.2"
       }
     },

02-filter-a-log-file/package.json

@@ -13,6 +13,7 @@
     "ava": "^4.3.1",
     "commander": "^9.4.0",
     "date-fns": "^2.29.1",
+    "fast-glob": "^3.2.11",
     "ua-parser-js": "^1.0.2"
   }
 }