feat: Alpha version. (#2)

第一个可用的版本，大概。

cf-worker/src/index.js

@@ -0,0 +1,105 @@
+// 改成你自己的 Github 用户名，注意是登录 Github 的那个用户名.
+const githubUserName = "LamGC";
+// 改成你 Fork 后的仓库名，记得要开启 Github Pages 功能.
+const githubInstSshProjectName = "quickly-conf-sshd";
+// 如果可以，建议在此设置备用的 SSH 公钥, 以防 Github 无法使用.
+const backupSshKeys = ``;
+// Worker 的访问地址, 如果不填的话默认为请求的地址, 填了就会用这里的地址(要去 Worker 的触发器那绑定, 否则无效).
+const defaultBaseUrl = "";
+// Cron 表达式, 默认 1 天执行一次更新.
+const cronExpression = "0 0 * * *";
+
+// 下面的东西一般不用改.
+const baseRepoPageUrl = `https://${githubUserName.toLowerCase()}.github.io/${githubInstSshProjectName}/`;
+const installScriptUrl = `${baseRepoPageUrl}/conf-sshd.sh`;
+// 如果出现 Github 无法使用的情况, 可以修改 sshKeyUrl 来变更位置.
+// 也可以添加额外的 SSH 公钥地址(比如 KeyBase).
+const sshKeyUrls = [
+  `https://github.com/${githubUserName}.keys`
+];
+
+// 下面是脚本的占位符.
+const SCRIPT_PH_SSH_KEY_URL = "{{ SSH_KEY_URL }}"
+const SCRIPT_PH_SCRIPT_URL = "{{ SCRIPT_URL }}"
+const SCRIPT_PH_DEFAULT_CRON = "{{ DEFAULT_CRON }}"
+
+
+async function sendScriptContent(baseUrl) {
+  let scriptResp = await fetch(new Request(installScriptUrl));
+  if (scriptResp.ok) {
+    let scriptContent = await scriptResp.text();
+
+    scriptContent = scriptContent.replace(SCRIPT_PH_SSH_KEY_URL, `${baseUrl}/ssh.keys`)
+                  .replace(SCRIPT_PH_SCRIPT_URL, `${baseUrl}/script.sh`)
+                  .replace(SCRIPT_PH_DEFAULT_CRON, cronExpression)
+
+    return new Response(scriptContent, {
+      headers: {
+        "content-type": "text/plain; charset=utf-8"
+      }
+    });
+  } else {
+    return new Response("Failed to get install script.", {
+      status: 500,
+      statusText: "Failed to get install script",
+      headers: {
+        "content-type": "text/plain; charset=utf-8"
+      }
+    });
+  }
+}
+
+export default {
+  async fetch(request, env) {
+    const { pathname, host } = new URL(request.url);
+    const baseUrl = defaultBaseUrl || `https://${host}`;
+    if (pathname === "/ssh.keys") {
+      for (let url of sshKeyUrls) {
+        let response = await fetch(new Request(url));
+        if (response.ok) {
+          let keys = await response.text()
+          return new Response(keys, {
+            headers: {
+              "content-type": "text/plain; charset=utf-8"
+            }
+          });
+        }
+      }
+      if (backupSshKeys.length > 0) {
+        return new Response(backupSshKeys, {
+          headers: {
+            "content-type": "text/plain; charset=utf-8"
+          }
+        });
+      } else {
+        return new Response("Failed to get keys.", {
+          status: 500,
+          statusText: "Failed to get keys",
+          headers: {
+            "content-type": "text/plain; charset=utf-8"
+          }
+        });
+      }
+    } else if (pathname === "/") {
+      const userAgent = request.headers.get("User-Agent");
+      if (userAgent != null && userAgent.match(/curl|libcurl/) !== null) {
+        return await sendScriptContent(baseUrl);
+      } else {
+        return new Response("", {
+          status: 301,
+          statusText: "Redirect",
+          headers: {
+            "Location": baseRepoPageUrl
+          }
+        });
+      }
+    } else if (pathname === "/script.sh") {
+      return await sendScriptContent(baseUrl);
+    } else {
+      return new Response("Not found.", {
+        status: 404,
+        statusText: "Not Found"
+      })
+    }
+  }
+}

cf-worker/wrangler.toml

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+name = "quickly-conf-ssh-worker"
+main = "src/index.js"
+compatibility_date = "2023-01-26"