Initial commit

node_modules/hono/dist/middleware/cors/index.js

@@ -0,0 +1,87 @@
+// src/middleware/cors/index.ts
+var cors = (options) => {
+  const defaults = {
+    origin: "*",
+    allowMethods: ["GET", "HEAD", "PUT", "POST", "DELETE", "PATCH"],
+    allowHeaders: [],
+    exposeHeaders: []
+  };
+  const opts = {
+    ...defaults,
+    ...options
+  };
+  const findAllowOrigin = ((optsOrigin) => {
+    if (typeof optsOrigin === "string") {
+      if (optsOrigin === "*") {
+        return () => optsOrigin;
+      } else {
+        return (origin) => optsOrigin === origin ? origin : null;
+      }
+    } else if (typeof optsOrigin === "function") {
+      return optsOrigin;
+    } else {
+      return (origin) => optsOrigin.includes(origin) ? origin : null;
+    }
+  })(opts.origin);
+  const findAllowMethods = ((optsAllowMethods) => {
+    if (typeof optsAllowMethods === "function") {
+      return optsAllowMethods;
+    } else if (Array.isArray(optsAllowMethods)) {
+      return () => optsAllowMethods;
+    } else {
+      return () => [];
+    }
+  })(opts.allowMethods);
+  return async function cors2(c, next) {
+    function set(key, value) {
+      c.res.headers.set(key, value);
+    }
+    const allowOrigin = await findAllowOrigin(c.req.header("origin") || "", c);
+    if (allowOrigin) {
+      set("Access-Control-Allow-Origin", allowOrigin);
+    }
+    if (opts.credentials) {
+      set("Access-Control-Allow-Credentials", "true");
+    }
+    if (opts.exposeHeaders?.length) {
+      set("Access-Control-Expose-Headers", opts.exposeHeaders.join(","));
+    }
+    if (c.req.method === "OPTIONS") {
+      if (opts.origin !== "*") {
+        set("Vary", "Origin");
+      }
+      if (opts.maxAge != null) {
+        set("Access-Control-Max-Age", opts.maxAge.toString());
+      }
+      const allowMethods = await findAllowMethods(c.req.header("origin") || "", c);
+      if (allowMethods.length) {
+        set("Access-Control-Allow-Methods", allowMethods.join(","));
+      }
+      let headers = opts.allowHeaders;
+      if (!headers?.length) {
+        const requestHeaders = c.req.header("Access-Control-Request-Headers");
+        if (requestHeaders) {
+          headers = requestHeaders.split(/\s*,\s*/);
+        }
+      }
+      if (headers?.length) {
+        set("Access-Control-Allow-Headers", headers.join(","));
+        c.res.headers.append("Vary", "Access-Control-Request-Headers");
+      }
+      c.res.headers.delete("Content-Length");
+      c.res.headers.delete("Content-Type");
+      return new Response(null, {
+        headers: c.res.headers,
+        status: 204,
+        statusText: "No Content"
+      });
+    }
+    await next();
+    if (opts.origin !== "*") {
+      c.header("Vary", "Origin", { append: true });
+    }
+  };
+};
+export {
+  cors
+};