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service.prerender.io giving 503 service unavailable

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Assessment

Difficulty
3/5
Estimated time
1-2 days
Newbie friendliness
25/100
Issue type
Bug
Clarity
Needs clarification
Activity status
Stale
Tech stack
apache
Domain
devops

Research direction

Start with the posted .htaccess and reproduce the failure using curl with the twitterbot user agent. Inspect the rewrite, proxy, and request-header conditions involved in forwarding to service.prerender.io; done means the request no longer returns a 503 response.

Written by the indexing model from the issue text.

Description

I've been testing prerender from curl and other social media platforms. Curl gives a 503 error. This is my .htaccess

<IfModule mod_headers.c>
    RequestHeader set X-Prerender-Token "MY_TOKEN"
    RequestHeader set X-Prerender-Version "prerender-apache@2.0.0"
</IfModule>

<IfModule mod_rewrite.c>
        RewriteEngine On

        # -- REDIRECTION to https (optional):
        # If you need this, uncomment the next two commands
        # RewriteCond %{HTTPS} !on
        # RewriteRule (.*) https://%{HTTP_HOST}%{REQUEST_URI}
        # --

        <IfModule mod_proxy_http.c>
        RewriteCond %{HTTP_USER_AGENT} googlebot|bingbot|yandex|baiduspider|facebookexternalhit|twitterbot|rogerbot|linkedinbot|embedly|quora\ link\$
        RewriteCond %{QUERY_STRING} _escaped_fragment_
        RewriteCond %{REQUEST_URI} ^(?!.*?(\.js|\.woff2|\.json|\.css|\.xml|\.less|\.png|\.jpg|\.jpeg|\.gif|\.pdf|\.doc|\.txt|\.ico|\.rss|\.zip|\.mp3$

        RewriteRule ^(index\.html|index\.php)?(.*) https://service.prerender.io/https://mydomain.co/$2 [P,END]
        </IfModule>


        RewriteCond %{DOCUMENT_ROOT}%{REQUEST_URI} -f [OR]
        RewriteCond %{DOCUMENT_ROOT}%{REQUEST_URI} -d

        RewriteRule ^.*$ - [NC,L]
        RewriteRule ^(.*) index.html [NC,L]
</IfModule>

Executing curl -A "twitterbot" https://mydomain.com gives me the next response:

<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
<html><head>
<title>503 Service Unavailable</title>
</head><body>
<h1>Service Unavailable</h1>
<p>The server is temporarily unable to service your
request due to maintenance downtime or capacity
problems. Please try again later.</p>
</body></html>
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First steps

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  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

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