Module: Roda::RodaPlugins::Base::RequestMethods
- Defined in:
- lib/roda.rb
Overview
Instance methods for RodaRequest, mostly related to handling routing for the request.
Constant Summary collapse
- PATH_INFO =
"PATH_INFO".freeze
- SCRIPT_NAME =
"SCRIPT_NAME".freeze
- REQUEST_METHOD =
"REQUEST_METHOD".freeze
- EMPTY_STRING =
"".freeze
- SLASH =
"/".freeze
- COLON =
":".freeze
- SEGMENT =
"([^\\/]+)".freeze
- TERM_INSPECT =
"TERM".freeze
- GET_REQUEST_METHOD =
'GET'.freeze
- SESSION_KEY =
'rack.session'.freeze
- TERM =
Object.new
Instance Attribute Summary collapse
-
#captures ⇒ Object
readonly
The current captures for the request.
-
#remaining_path ⇒ Object
readonly
The current path to match requests against.
-
#scope ⇒ Object
readonly
The Roda instance related to this request object.
Instance Method Summary collapse
-
#block_result(result) ⇒ Object
Handle match block return values.
-
#get(*args, &block) ⇒ Object
Match GET requests.
-
#halt(res = response.finish) ⇒ Object
Immediately stop execution of the route block and return the given rack response array of status, headers, and body.
-
#initialize(scope, env) ⇒ Object
Store the roda instance and environment.
-
#inspect ⇒ Object
Show information about current request, including request class, request method and full path.
-
#is(*args, &block) ⇒ Object
Does a terminal match on the current path, matching only if the arguments have fully matched the path.
-
#is_get? ⇒ Boolean
Optimized method for whether this request is a
GET
request. -
#matched_path ⇒ Object
The already matched part of the path, including the original SCRIPT_NAME.
-
#on(*args, &block) ⇒ Object
Does a match on the path, matching only if the arguments have matched the path.
-
#path ⇒ Object
This an an optimized version of Rack::Request#path.
-
#post(*args, &block) ⇒ Object
Match POST requests.
-
#real_remaining_path ⇒ Object
An alias of remaining_path.
-
#redirect(path = default_redirect_path, status = default_redirect_status) ⇒ Object
Immediately redirect to the path using the status code.
-
#response ⇒ Object
The response related to the current request.
-
#roda_class ⇒ Object
Return the Roda class related to this request.
-
#root(&block) ⇒ Object
Routing matches that only matches
GET
requests where the current path is/
. -
#run(app) ⇒ Object
Call the given rack app with the environment and return the response from the rack app as the response for this request.
-
#session ⇒ Object
The session for the current request.
Instance Attribute Details
#captures ⇒ Object (readonly)
The current captures for the request. This gets modified as routing occurs.
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# File 'lib/roda.rb', line 361 def captures @captures end |
#remaining_path ⇒ Object (readonly)
The current path to match requests against.
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# File 'lib/roda.rb', line 528 def remaining_path @remaining_path end |
#scope ⇒ Object (readonly)
The Roda instance related to this request object. Useful if routing methods need access to the scope of the Roda route block.
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# File 'lib/roda.rb', line 365 def scope @scope end |
Instance Method Details
#block_result(result) ⇒ Object
Handle match block return values. By default, if a string is given and the response is empty, use the string as the response body.
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# File 'lib/roda.rb', line 377 def block_result(result) res = response if res.empty? && (body = block_result_body(result)) res.write(body) end end |
#get(*args, &block) ⇒ Object
Match GET requests. If no arguments are provided, matches all GET requests, otherwise, matches only GET requests where the arguments given fully consume the path.
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# File 'lib/roda.rb', line 387 def get(*args, &block) _verb(args, &block) if is_get? end |
#halt(res = response.finish) ⇒ Object
Immediately stop execution of the route block and return the given rack response array of status, headers, and body. If no argument is given, uses the current response.
r.halt [200, {'Content-Type'=>'text/html'}, ['Hello World!']]
response.status = 200
response['Content-Type'] = 'text/html'
response.write 'Hello World!'
r.halt
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# File 'lib/roda.rb', line 401 def halt(res=response.finish) throw :halt, res end |
#initialize(scope, env) ⇒ Object
Store the roda instance and environment.
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# File 'lib/roda.rb', line 368 def initialize(scope, env) @scope = scope @captures = [] @remaining_path = _remaining_path(env) super(env) end |
#inspect ⇒ Object
Show information about current request, including request class, request method and full path.
r.inspect
# => '#<Roda::RodaRequest GET /foo/bar>'
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# File 'lib/roda.rb', line 410 def inspect "#<#{self.class.inspect} #{@env[REQUEST_METHOD]} #{path}>" end |
#is(*args, &block) ⇒ Object
Does a terminal match on the current path, matching only if the arguments have fully matched the path. If it matches, the match block is executed, and when the match block returns, the rack response is returned.
r.remaining_path
# => "/foo/bar"
r.is 'foo' do
# does not match, as path isn't fully matched (/bar remaining)
end
r.is 'foo/bar' do
# matches as path is empty after matching
end
If no arguments are given, matches if the path is already fully matched.
r.on 'foo/bar' do
r.is do
# matches as path is already empty
end
end
Note that this matches only if the path after matching the arguments is empty, not if it still contains a trailing slash:
r.remaining_path
# => "/foo/bar/"
r.is 'foo/bar' do
# does not match, as path isn't fully matched (/ remaining)
end
r.is 'foo/bar/' do
# matches as path is empty after matching
end
r.on 'foo/bar' do
r.is "" do
# matches as path is empty after matching
end
end
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# File 'lib/roda.rb', line 457 def is(*args, &block) if args.empty? if empty_path? always(&block) end else args << TERM if_match(args, &block) end end |
#is_get? ⇒ Boolean
Optimized method for whether this request is a GET
request. Similar to the default Rack::Request get? method, but can be overridden without changing rack’s behavior.
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# File 'lib/roda.rb', line 471 def is_get? @env[REQUEST_METHOD] == GET_REQUEST_METHOD end |
#matched_path ⇒ Object
The already matched part of the path, including the original SCRIPT_NAME.
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# File 'lib/roda.rb', line 511 def matched_path e = @env e[SCRIPT_NAME] + e[PATH_INFO].chomp(@remaining_path) end |
#on(*args, &block) ⇒ Object
Does a match on the path, matching only if the arguments have matched the path. Because this doesn’t fully match the path, this is usually used to setup branches of the routing tree, not for final handling of the request.
r.remaining_path
# => "/foo/bar"
r.on 'foo' do
# matches, path is /bar after matching
end
r.on 'bar' do
# does not match
end
Like other routing methods, If it matches, the match block is executed, and when the match block returns, the rack response is returned. However, in general you will call another routing method inside the match block that fully matches the path and does the final handling for the request:
r.on 'foo' do
r.is 'bar' do
# handle /foo/bar request
end
end
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# File 'lib/roda.rb', line 502 def on(*args, &block) if args.empty? always(&block) else if_match(args, &block) end end |
#path ⇒ Object
This an an optimized version of Rack::Request#path.
r.env['SCRIPT_NAME'] = '/foo'
r.env['PATH_INFO'] = '/bar'
r.path
# => '/foo/bar'
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# File 'lib/roda.rb', line 522 def path e = @env "#{e[SCRIPT_NAME]}#{e[PATH_INFO]}" end |
#post(*args, &block) ⇒ Object
Match POST requests. If no arguments are provided, matches all POST requests, otherwise, matches only POST requests where the arguments given fully consume the path.
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# File 'lib/roda.rb', line 539 def post(*args, &block) _verb(args, &block) if post? end |
#real_remaining_path ⇒ Object
An alias of remaining_path. If a plugin changes remaining_path then it should override this method to return the untouched original.
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# File 'lib/roda.rb', line 532 def real_remaining_path remaining_path end |
#redirect(path = default_redirect_path, status = default_redirect_status) ⇒ Object
Immediately redirect to the path using the status code. This ends the processing of the request:
r.redirect '/page1', 301 if r['param'] == 'value1'
r.redirect '/page2' # uses 302 status code
response.status = 404 # not reached
If you do not provide a path, by default it will redirect to the same path if the request is not a GET
request. This is designed to make it easy to use where a POST
request to a URL changes state, GET
returns the current state, and you want to show the current state after changing:
r.is "foo" do
r.get do
# show state
end
r.post do
# change state
r.redirect
end
end
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# File 'lib/roda.rb', line 566 def redirect(path=default_redirect_path, status=default_redirect_status) response.redirect(path, status) throw :halt, response.finish end |
#response ⇒ Object
The response related to the current request. See ResponseMethods for instance methods for the response, but in general the most common usage is to override the response status and headers:
response.status = 200
response['Header-Name'] = 'Header value'
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# File 'lib/roda.rb', line 577 def response @scope.response end |
#roda_class ⇒ Object
Return the Roda class related to this request.
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# File 'lib/roda.rb', line 582 def roda_class self.class.roda_class end |
#root(&block) ⇒ Object
Routing matches that only matches GET
requests where the current path is /
. If it matches, the match block is executed, and when the match block returns, the rack response is returned.
[r.request_method, r.remaining_path]
# => ['GET', '/']
r.root do
# matches
end
This is usuable inside other match blocks:
[r.request_method, r.remaining_path]
# => ['GET', '/foo/']
r.on 'foo' do
r.root do
# matches
end
end
Note that this does not match non-GET
requests:
[r.request_method, r.remaining_path]
# => ['POST', '/']
r.root do
# does not match
end
Use r.post ""
for POST
requests where the current path is /
.
Nor does it match empty paths:
[r.request_method, r.remaining_path]
# => ['GET', '/foo']
r.on 'foo' do
r.root do
# does not match
end
end
Use r.get true
to handle GET
requests where the current path is empty.
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# File 'lib/roda.rb', line 633 def root(&block) if remaining_path == SLASH && is_get? always(&block) end end |
#run(app) ⇒ Object
Call the given rack app with the environment and return the response from the rack app as the response for this request. This ends the processing of the request:
r.run(proc{[403, {}, []]}) unless r['letmein'] == '1'
r.run(proc{[404, {}, []]})
response.status = 404 # not reached
This updates SCRIPT_NAME/PATH_INFO based on the current remaining_path before dispatching to another rack app, so the app still works as a URL mapper.
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# File 'lib/roda.rb', line 650 def run(app) e = @env path = real_remaining_path sn = SCRIPT_NAME pi = PATH_INFO script_name = e[sn] path_info = e[pi] begin e[sn] += path_info.chomp(path) e[pi] = path throw :halt, app.call(e) ensure e[sn] = script_name e[pi] = path_info end end |
#session ⇒ Object
The session for the current request. Raises a RodaError if a session handler has not been loaded.
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# File 'lib/roda.rb', line 669 def session @env[SESSION_KEY] || raise(RodaError, "You're missing a session handler. You can get started by adding use Rack::Session::Cookie") end |