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client/lua: wrap tags with error handler

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This commit is contained in:
Ben Klein 2021-07-11 15:06:40 -04:00
parent 372b40a6b5
commit 6e07c61d3f
1 changed files with 76 additions and 69 deletions
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17
client/metatags.lua
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@ -41,6 +41,7 @@ end
add_meta_tag("og:site_name", server_info.config.name) add_meta_tag("og:site_name", server_info.config.name)
add_meta_tag("og:url", ngx.var.external_host_url .. ngx.var.request_uri_path) add_meta_tag("og:url", ngx.var.external_host_url .. ngx.var.request_uri_path)
local function generate_meta_tags ()
if ngx.var.request_uri_path:match('^/$') then -- Site root if ngx.var.request_uri_path:match('^/$') then -- Site root
add_meta_tag("og:type", "website") add_meta_tag("og:type", "website")
add_meta_tag("og:title", server_info.config.name) add_meta_tag("og:title", server_info.config.name)
@ -73,17 +74,17 @@ elseif ngx.var.request_uri_path:match('^/post/([0-9]+)/?$') then -- Post metadat
add_meta_tag("twitter:title", server_info.config.name .. " - Post " .. post_info.id) add_meta_tag("twitter:title", server_info.config.name .. " - Post " .. post_info.id)
add_meta_tag("article:published_time", post_info.creationTime) add_meta_tag("article:published_time", post_info.creationTime)
local og_media_prefix local og_media_prefix
if post_info.type == "image" then if post_info.type == "video" then
og_media_prefix = "og:image"
add_meta_tag("twitter:card", "summary_large_image")
add_meta_tag("twitter:image", ngx.var.external_host_url .. '/' .. post_info.contentUrl)
elseif post_info.type == "video" then
og_media_prefix = "og:video" og_media_prefix = "og:video"
add_meta_tag("twitter:card", "player") add_meta_tag("twitter:card", "player")
add_meta_tag("twitter:player:width", post_info.canvasWidth) add_meta_tag("twitter:player:width", post_info.canvasWidth)
add_meta_tag("twitter:player:height", post_info.canvasHeight) add_meta_tag("twitter:player:height", post_info.canvasHeight)
-- some sites don't preview video, so at least provide a thumbnail -- some sites don't preview video, so at least provide a thumbnail
add_meta_tag("og:image", ngx.var.external_host_url .. '/' .. post_info.thumbnailUrl) add_meta_tag("og:image", ngx.var.external_host_url .. '/' .. post_info.thumbnailUrl)
else
og_media_prefix = "og:image"
add_meta_tag("twitter:card", "summary_large_image")
add_meta_tag("twitter:image", ngx.var.external_host_url .. '/' .. post_info.contentUrl)
end end
add_meta_tag(og_media_prefix..":url", ngx.var.external_host_url .. '/' .. post_info.contentUrl) add_meta_tag(og_media_prefix..":url", ngx.var.external_host_url .. '/' .. post_info.contentUrl)
add_meta_tag(og_media_prefix..":width", post_info.canvasWidth) add_meta_tag(og_media_prefix..":width", post_info.canvasWidth)
@ -115,6 +116,12 @@ elseif ngx.var.request_uri_path:match('^/user/([^/]+)/?$') then -- User metadata
-- no permission to view user data -- no permission to view user data
end end
end end
end
local status, err = pcall(generate_meta_tags)
if not status then
ngx.log(ngx.STDERR, "Failed to generate meta tags: "..tostring(err))
end
-- Once tags have been generated, write them and then finish the response -- Once tags have been generated, write them and then finish the response
ngx.print(additional_tags) ngx.print(additional_tags)