Throw in a fun little asciichart display.

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

@@ -9,7 +9,7 @@ import format from "date-fns/format/index.js";
 program
   .option("--min <Number>", "The lowest count to print. Stop at this.", 1)
   .option("--errors", "Show the errors so you can fix them.", false)
-  .requiredOption("--outfile <String>", "Save to file rather than stdout.")
+  .requiredOption("--output <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.")
@@ -276,6 +276,6 @@ const output_json = async (stats, data, domain, min, outfile) => {
 
 const [by_date, stats] = await parse_logs_glob(OPTS.input, OPTS.errors);
 
-output_json(stats, by_date, OPTS.domain, OPTS.min, OPTS.outfile);
+output_json(stats, by_date, OPTS.domain, OPTS.min, OPTS.output);
 
 console.log(stats);

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

@@ -4,11 +4,14 @@ import readline from "readline";
 import { program } from "commander";
 import glob from "fast-glob";
 import format from "date-fns/format/index.js";
+import asciichart from "asciichart";
 
 program
   .option("--min <Number>", "The lowest count to print. Stop at this.", 1)
   .option("--errors", "Show the errors so you can fix them.", false)
   .option("--outfile <String>", "Save to file rather than stdout.")
+  .option("--max-days <int>", "Only display charts for entries with at least this many days.", 10)
+  .option("--height <int>", "Height of the ascii graph.", 5)
   .requiredOption("--input <String>", "Input file glob.")
   .description("Loads the output of a chain parser and produces a report.")
   .version(0.1);
@@ -18,6 +21,10 @@ const OPTS = program.opts();
 OPTS.min = parseInt(OPTS.min);
 assert(!isNaN(OPTS.min), `min must be a number, you have ${OPTS.min}`);
 
+OPTS.height = parseInt(OPTS.height);
+assert(!isNaN(OPTS.height), `height must be a number, you have ${OPTS.height}`);
+
+
 const sort_request_chains = (chains, min) => {
   const converted = [];
 
@@ -36,14 +43,24 @@ const sort_request_chains = (chains, min) => {
 
 const { stats, domain, result, generated_on} = JSON.parse(fs.readFileSync(OPTS.input));
 
-const dates = Object.keys(result).sort();
+const sorted = [];
+const keys = Object.keys(result).sort();
+
+const by_chain = {};
 
-for(let key of dates) {
+for(let key of keys) {
-  console.log(`--- ${key} ---`);
+  const chain = sort_request_chains(result[key], OPTS.min);
 
-  const stats = sort_request_chains(result[key], OPTS.min);
+  for(let [count, urls] of chain) {
+    const series = by_chain[urls] || [];
+    series.push(count);
+    by_chain[urls] = series;
+  }
+}
 
-  for(let [count, chain] of stats) {
+for(let [chain, counts] of Object.entries(by_chain)) {
-    console.log(count, "\t", chain);
+  if(counts.length > OPTS.maxDays) {
+    console.log(chain);
+    console.log(asciichart.plot(counts, {height: OPTS.height}));
   }
 }

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

@@ -9,6 +9,7 @@
       "version": "1.0.0",
       "license": "BSD",
       "dependencies": {
+        "asciichart": "^1.5.25",
         "ava": "^4.3.1",
         "commander": "^9.4.0",
         "date-fns": "^2.29.1",
@@ -159,6 +160,11 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
     },
+    "node_modules/asciichart": {
+      "version": "1.5.25",
+      "resolved": "https://registry.npmjs.org/asciichart/-/asciichart-1.5.25.tgz",
+      "integrity": "sha512-PNxzXIPPOtWq8T7bgzBtk9cI2lgS4SJZthUHEiQ1aoIc3lNzGfUvIvo9LiAnq26TACo9t1/4qP6KTGAUbzX9Xg=="
+    },
     "node_modules/ava": {
       "version": "4.3.1",
       "resolved": "https://registry.npmjs.org/ava/-/ava-4.3.1.tgz",
@@ -1929,6 +1935,11 @@
       "resolved": "https://registry.npmjs.org/arrify/-/arrify-3.0.0.tgz",
       "integrity": "sha512-tLkvA81vQG/XqE2mjDkGQHoOINtMHtysSnemrmoGe6PydDPMRbVugqyk4A6V/WDWEfm3l+0d8anA9r8cv/5Jaw=="
     },
+    "asciichart": {
+      "version": "1.5.25",
+      "resolved": "https://registry.npmjs.org/asciichart/-/asciichart-1.5.25.tgz",
+      "integrity": "sha512-PNxzXIPPOtWq8T7bgzBtk9cI2lgS4SJZthUHEiQ1aoIc3lNzGfUvIvo9LiAnq26TACo9t1/4qP6KTGAUbzX9Xg=="
+    },
     "ava": {
       "version": "4.3.1",
       "resolved": "https://registry.npmjs.org/ava/-/ava-4.3.1.tgz",

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

@@ -10,6 +10,7 @@
   "author": "",
   "license": "BSD",
   "dependencies": {
+    "asciichart": "^1.5.25",
     "ava": "^4.3.1",
     "commander": "^9.4.0",
     "date-fns": "^2.29.1",