init(app): Setup client package for web api specific logic

2026-08-02 17:31:41 +00:00 · 2026-07-02 17:33:29 -04:00
parent f56116a26b
commit bcfeea93c9
27 changed files with 3104 additions and 0 deletions
@@ -0,0 +1,64 @@
+import { execFile } from "node:child_process";
+import { mkdtemp, readFile, rm, writeFile } from "node:fs/promises";
+import { tmpdir } from "node:os";
+import { join } from "node:path";
+import { promisify } from "node:util";
+import type { Plugin } from "vite";
+
+const run = promisify(execFile);
+
+/**
+ * Dev-only PDF compiler. Uses the same local TeX Live toolchain as the
+ * repository Makefile, so dev output is byte-identical to `make`.
+ * In production the client falls back to the Worker's /api/pdf route.
+ */
+export function latexDev(): Plugin {
+  return {
+    name: "latex-dev-compiler",
+    apply: "serve",
+    configureServer(server) {
+      server.middlewares.use("/local/compile", (req, res) => {
+        if (req.method !== "POST") {
+          res.statusCode = 405;
+          res.end();
+          return;
+        }
+        const chunks: Buffer[] = [];
+        req.on("data", (c: Buffer) => chunks.push(c));
+        req.on("end", () => {
+          void (async () => {
+            let dir: string | undefined;
+            try {
+              const { latex } = JSON.parse(Buffer.concat(chunks).toString("utf8")) as {
+                latex: string;
+              };
+              dir = await mkdtemp(join(tmpdir(), "cvtex-"));
+              await writeFile(join(dir, "main.tex"), latex, "utf8");
+              await run("pdflatex", ["-interaction=nonstopmode", "-halt-on-error", "main.tex"], {
+                cwd: dir,
+                timeout: 30_000,
+              });
+              const pdf = await readFile(join(dir, "main.pdf"));
+              res.setHeader("Content-Type", "application/pdf");
+              res.end(pdf);
+            } catch (err) {
+              let log = err instanceof Error ? err.message : String(err);
+              if (dir) {
+                try {
+                  log = (await readFile(join(dir, "main.log"), "utf8")).slice(-4000);
+                } catch {
+                  /* no log written */
+                }
+              }
+              res.statusCode = 422;
+              res.setHeader("Content-Type", "application/json");
+              res.end(JSON.stringify({ error: "pdflatex failed", log }));
+            } finally {
+              if (dir) void rm(dir, { recursive: true, force: true });
+            }
+          })();
+        });
+      });
+    },
+  };
+}