Created
November 1, 2013 19:28
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Rack middleware for returning pretty JSON when `pretty` parameter is present and it's not `"false"`.
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| module Rack | |
| # Prettify JSON responses on demand. | |
| # | |
| # | |
| # | |
| # Builder Usage: | |
| # use Rack::PrettyJSON | |
| # | |
| class PrettyJSON | |
| include Rack::Utils | |
| def initialize(app) | |
| @app = app | |
| end | |
| def call(env) | |
| status, headers, response = @app.call(env) | |
| headers = HeaderHash.new(headers) | |
| request = Rack::Request.new(env) | |
| if is_json?(headers) && should_prettify?(request) | |
| response = prettify(response) | |
| # Set new Content-Length, if it was set before we mutated the response body | |
| if headers["Content-Length"] | |
| length = response.to_ary.inject(0) { |len, part| len + bytesize(part) } | |
| headers["Content-Length"] = length.to_s | |
| end | |
| end | |
| [status, headers, response] | |
| end | |
| private | |
| def is_json?(headers) | |
| headers.key?("Content-Type") && headers["Content-Type"].include?("application/json") | |
| end | |
| def should_prettify?(request) | |
| request.params.has_key?("pretty") && !(request.params["pretty"] == "false") | |
| end | |
| def prettify(response) | |
| body = response.inject("") { |body, part| body << part.to_s } | |
| [JSON.pretty_generate(JSON.parse(body))] | |
| end | |
| end | |
| end |
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