71 lines
2.0 KiB
Elixir
71 lines
2.0 KiB
Elixir
defmodule Frenzy.Network do
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require Logger
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@http_redirect_codes [301, 302]
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@spec http_get(String.t()) :: {:ok, Mojito.Response.t()} | {:error, term()}
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def http_get(url) do
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case Mojito.request(:get, url, [], "", transport_opts: [cacertfile: CAStore.file_path()]) do
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{:ok, %Mojito.Response{status_code: 200} = response} ->
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{:ok, response}
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{:ok, %Mojito.Response{status_code: status_code, headers: headers}}
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when status_code in @http_redirect_codes ->
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headers
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|> Enum.find(fn {name, _value} -> name == "location" end)
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|> case do
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{"location", new_url} ->
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new_url =
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case URI.parse(new_url) do
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%URI{host: nil, path: path} ->
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# relative path
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%URI{URI.parse(url) | path: path} |> URI.to_string()
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uri ->
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uri
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end
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Logger.debug("Got 301 redirect from #{url} to #{new_url}")
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http_get(new_url)
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_ ->
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{:error, "Missing Location header for redirect"}
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end
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{:ok, %Mojito.Response{status_code: 403}} ->
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{:error, "403 Forbidden"}
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{:ok, %Mojito.Response{status_code: 404}} ->
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{:error, "404 Not Found"}
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{:ok, %Mojito.Response{status_code: status_code}} ->
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{:error, "HTTP #{status_code}"}
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{:error, error} ->
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{:error, error}
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end
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end
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@gemini_success_codes 20..29
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@gemini_redirect_codes 30..39
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@spec gemini_request(String.t() | URI.t()) :: {:ok, Gemini.Response.t()} | {:error, term()}
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def gemini_request(uri) do
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case Gemini.request(uri) do
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{:ok, %Gemini.Response{status: code} = response} when code in @gemini_success_codes ->
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{:ok, response}
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{:ok, %Gemini.Response{status: code, meta: new_url}}
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when code in @gemini_redirect_codes ->
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gemini_request(URI.merge(uri, new_url))
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{:ok, %Gemini.Response{status: code}} ->
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{:error, "Unhandled Gemini status code: #{code}"}
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{:error, reason} ->
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{:error, reason}
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end
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end
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end
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