40 lines
1.1 KiB
Markdown
40 lines
1.1 KiB
Markdown
# HTTP Request / Response Lifecycle
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Accessing the HTTP request/response environment (query params, body, content_type, headers, status_code) is super easy. You can use the environment returned from the block:
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```ruby
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# Matches /hello/kemal
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get "/hello/:name" do |env|
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name = env.params["name"]
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"Hello back to #{name}"
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end
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# Matches /resize?width=200&height=200
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get "/resize" do |env|
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width = env.params["width"]
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height = env.params["height"]
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end
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# Easily access JSON payload from the params.
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# The request content type needs to be application/json
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# The payload
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# {"name": "Serdar", "likes": ["Ruby", "Crystal"]}
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post "/json_params" do |env|
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name = env.params["name"] as String
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likes = env.params["likes"] as Array
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"#{name} likes #{likes.each.join(',')}"
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end
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# Set the content as application/json and return JSON
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get "/user.json" do |env|
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kemal = {name: "Kemal", language: "Crystal"}
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env.content_type = "application/json"
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kemal.to_json
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end
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# Add headers to your response
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get "/headers" do |env|
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env.add_header "Accept-Language", "tr"
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env.add_header "Authorization", "Token 12345"
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end
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