nginx 当从http切换到https时,Express res.write()无法正常工作

00jrzges  于 12个月前  发布在  Nginx
关注(0)|答案(1)|浏览(129)

我正在使用express.write()方法来流式传输通过递归脚本收集的链接。它在本地和没有SSL的nginx服务器上工作正常。然而,当我添加SSL响应时,不会流式传输,而是在脚本完成时返回。下面是控制器

const getLinks = async (req, response) => {
  response.flush = () => {};
  if (!req.query.siteUrl) {
    return res.json({ error: "Site url not provided" });
  }

  response.writeHead(206, {
    "Content-Type": "text/plain; charset=utf-8",
    "Transfer-Encoding": "chunked",
    "X-Content-Type-Options": "nosniff",
  });

  const crawl = async (url) => {
    totalUrlsVisited++;
    // console.log(`Crawling: ${url}`);
    const links = await getAllWebsiteLinks(url, internalUrls);
    if (links.length) {
      for (const link of links) {
        if (totalUrlsVisited < 30) await crawl(link);
      }
    }
  };

  const isValid = (url) => {
    if (url.includes("@")) return false;
    if (url.includes("mailto")) return false;
    const parsedUrl = urlparse.parse(url);
    const result = Boolean(parsedUrl.hostname) && Boolean(parsedUrl.protocol);

    return result;
  };

  const getAllWebsiteLinks = async (url, internalUrls) => {
    const urls = [];
    let res;
    try {
      res = await axios.get(url, { timeout: "10000" });
    } catch (error) {
      console.log(error.message, url);
      return [];
    }
    const $ = cheerio.load(res.data);
    const allATags = $("a").toArray();

    for (const element of allATags) {
      const $element = $(element);
      let href = $element.attr("href");
      if (!href || href === "") continue;
      const absoluteUrl = new URL(href, url).toString();
      const parsedUrl = urlparse.parse(absoluteUrl);
      const sanitizedUrl = `${parsedUrl.protocol}//${parsedUrl.hostname}${
        parsedUrl.pathname ? parsedUrl.pathname : ""
      }`;
      if (internalUrls.includes(sanitizedUrl)) continue;
      if (parsedUrl.hostname !== domainName) continue;
      if (!isValid(sanitizedUrl)) continue;
      internalUrls.push(sanitizedUrl);
      urls.push(sanitizedUrl);
      urlsBatch.push(sanitizedUrl);
      if (urlsBatch.length === 5) {
        await response.write(JSON.stringify(urlsBatch));

        console.log(urlsBatch);
        urlsBatch = [];
      }
    }

    return urls;
  };

  const internalUrls = [];
  let totalUrlsVisited = 0;
  let urlsBatch = [];
  const url = req.query.siteUrl;
  const domainName = urlparse.parse(url).hostname;

  await crawl(url, internalUrls, totalUrlsVisited);
  console.log(internalUrls.length, totalUrlsVisited);
  response.end();
};

字符串
在客户端上,我阅读的响应如下:

try {
      setFetchingMore(true);
      const { auth } = await chrome.storage.local.get("auth");
      const response = await fetch(
        `http://localhost:8000/api/chat/get_links/?siteUrl=${window.location.origin}`,
        {
          signal: controller.signal,
          headers: {
            Accept: "text/event-stream",
            Authorization: auth.id_token,
          },
        }
      );

      if (!response.ok) {
        throw Error(response.statusText);
      }

      for (const reader = response.body.getReader(); ; ) {
        const { value, done } = await reader.read();

        if (done) {
          setFetchingMore(false);
          break;
        }

        const chunk = new TextDecoder().decode(value);
        console.log(chunk);
        // console.log(JSON.parse(chunk));
        // setLinks((curr) => [...curr, ...JSON.parse(chunk)]);
      }
    } catch (error) {
      console.log(error);
    }


下面是我的nginx配置

server {
    if ($host = api.domain.com) {
        return 301 https://$host$request_uri;
    } # managed by Certbot

                listen 80;
                server_name api.domain.com;
    return 404; # managed by Certbot

    }
}

a8jjtwal

a8jjtwal1#

在nginx配置中关闭代理缓冲可以解决这个问题
第一个月

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