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cdesc-CGI.yaml
12.56
KB
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cookie-c.yaml
229
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env_table-i.yaml
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error-c.yaml
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escape-c.yaml
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escapeElement-c.yaml
1.08
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escapeHTML-c.yaml
460
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header-c.yaml
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header-i.yaml
4.86
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message-c.yaml
287
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new-c.yaml
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out-i.yaml
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parse-c.yaml
520
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pretty-c.yaml
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print-c.yaml
262
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print-i.yaml
395
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read_from_cmdline-i.yaml
276
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rfc1123_date-c.yaml
240
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stdinput-i.yaml
168
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stdoutput-i.yaml
170
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tag-c.yaml
355
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unescape-c.yaml
227
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unescapeElement-c.yaml
782
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unescapeHTML-c.yaml
462
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Code Editor : cdesc-CGI.yaml
--- !ruby/object:RI::ClassDescription attributes: - !ruby/object:RI::Attribute comment: name: cookie rw: R - !ruby/object:RI::Attribute comment: name: inputs rw: R class_methods: - !ruby/object:RI::MethodSummary name: cookie - !ruby/object:RI::MethodSummary name: error - !ruby/object:RI::MethodSummary name: escape - !ruby/object:RI::MethodSummary name: escape - !ruby/object:RI::MethodSummary name: escapeElement - !ruby/object:RI::MethodSummary name: escapeHTML - !ruby/object:RI::MethodSummary name: escapeHTML - !ruby/object:RI::MethodSummary name: header - !ruby/object:RI::MethodSummary name: message - !ruby/object:RI::MethodSummary name: new - !ruby/object:RI::MethodSummary name: new - !ruby/object:RI::MethodSummary name: parse - !ruby/object:RI::MethodSummary name: pretty - !ruby/object:RI::MethodSummary name: print - !ruby/object:RI::MethodSummary name: rfc1123_date - !ruby/object:RI::MethodSummary name: rfc1123_date - !ruby/object:RI::MethodSummary name: tag - !ruby/object:RI::MethodSummary name: unescape - !ruby/object:RI::MethodSummary name: unescape - !ruby/object:RI::MethodSummary name: unescapeElement - !ruby/object:RI::MethodSummary name: unescapeHTML comment: - !ruby/struct:SM::Flow::P body: CGI class. See documentation for the file cgi.rb for an overview of the CGI protocol. - !ruby/struct:SM::Flow::H level: 2 text: Introduction - !ruby/struct:SM::Flow::P body: CGI is a large class, providing several categories of methods, many of which are mixed in from other modules. Some of the documentation is in this class, some in the modules CGI::QueryExtension and CGI::HtmlExtension. See CGI::Cookie for specific information on handling cookies, and cgi/session.rb (CGI::Session) for information on sessions. - !ruby/struct:SM::Flow::P body: For queries, CGI provides methods to get at environmental variables, parameters, cookies, and multipart request data. For responses, CGI provides methods for writing output and generating HTML. - !ruby/struct:SM::Flow::P body: Read on for more details. Examples are provided at the bottom. - !ruby/struct:SM::Flow::H level: 2 text: Queries - !ruby/struct:SM::Flow::P body: The CGI class dynamically mixes in parameter and cookie-parsing functionality, environmental variable access, and support for parsing multipart requests (including uploaded files) from the CGI::QueryExtension module. - !ruby/struct:SM::Flow::H level: 3 text: Environmental Variables - !ruby/struct:SM::Flow::P body: "The standard CGI environmental variables are available as read-only attributes of a CGI object. The following is a list of these variables:" - !ruby/struct:SM::Flow::VERB body: " AUTH_TYPE HTTP_HOST REMOTE_IDENT\n CONTENT_LENGTH HTTP_NEGOTIATE REMOTE_USER\n CONTENT_TYPE HTTP_PRAGMA REQUEST_METHOD\n GATEWAY_INTERFACE HTTP_REFERER SCRIPT_NAME\n HTTP_ACCEPT HTTP_USER_AGENT SERVER_NAME\n HTTP_ACCEPT_CHARSET PATH_INFO SERVER_PORT\n HTTP_ACCEPT_ENCODING PATH_TRANSLATED SERVER_PROTOCOL\n HTTP_ACCEPT_LANGUAGE QUERY_STRING SERVER_SOFTWARE\n HTTP_CACHE_CONTROL REMOTE_ADDR\n HTTP_FROM REMOTE_HOST\n" - !ruby/struct:SM::Flow::P body: For each of these variables, there is a corresponding attribute with the same name, except all lower case and without a preceding HTTP_. <tt>content_length</tt> and <tt>server_port</tt> are integers; the rest are strings. - !ruby/struct:SM::Flow::H level: 3 text: Parameters - !ruby/struct:SM::Flow::P body: "The method #params() returns a hash of all parameters in the request as name/value-list pairs, where the value-list is an Array of one or more values. The CGI object itself also behaves as a hash of parameter names to values, but only returns a single value (as a String) for each parameter name." - !ruby/struct:SM::Flow::P body: "For instance, suppose the request contains the parameter "favourite_colours" with the multiple values "blue" and "green". The following behaviour would occur:" - !ruby/struct:SM::Flow::VERB body: " cgi.params["favourite_colours"] # => ["blue", "green"]\n cgi["favourite_colours"] # => "blue"\n" - !ruby/struct:SM::Flow::P body: "If a parameter does not exist, the former method will return an empty array, the latter an empty string. The simplest way to test for existence of a parameter is by the #has_key? method." - !ruby/struct:SM::Flow::H level: 3 text: Cookies - !ruby/struct:SM::Flow::P body: "HTTP Cookies are automatically parsed from the request. They are available from the #cookies() accessor, which returns a hash from cookie name to CGI::Cookie object." - !ruby/struct:SM::Flow::H level: 3 text: Multipart requests - !ruby/struct:SM::Flow::P body: "If a request's method is POST and its content type is multipart/form-data, then it may contain uploaded files. These are stored by the QueryExtension module in the parameters of the request. The parameter name is the name attribute of the file input field, as usual. However, the value is not a string, but an IO object, either an IOString for small files, or a Tempfile for larger ones. This object also has the additional singleton methods:" - !ruby/object:SM::Flow::LIST contents: - !ruby/struct:SM::Flow::LI label: "#local_path():" body: the path of the uploaded file on the local filesystem - !ruby/struct:SM::Flow::LI label: "#original_filename():" body: the name of the file on the client computer - !ruby/struct:SM::Flow::LI label: "#content_type():" body: the content type of the file type: :NOTE - !ruby/struct:SM::Flow::H level: 2 text: Responses - !ruby/struct:SM::Flow::P body: The CGI class provides methods for sending header and content output to the HTTP client, and mixes in methods for programmatic HTML generation from CGI::HtmlExtension and CGI::TagMaker modules. The precise version of HTML to use for HTML generation is specified at object creation time. - !ruby/struct:SM::Flow::H level: 3 text: Writing output - !ruby/struct:SM::Flow::P body: "The simplest way to send output to the HTTP client is using the #out() method. This takes the HTTP headers as a hash parameter, and the body content via a block. The headers can be generated as a string using the #header() method. The output stream can be written directly to using the #print() method." - !ruby/struct:SM::Flow::H level: 3 text: Generating HTML - !ruby/struct:SM::Flow::P body: Each HTML element has a corresponding method for generating that element as a String. The name of this method is the same as that of the element, all lowercase. The attributes of the element are passed in as a hash, and the body as a no-argument block that evaluates to a String. The HTML generation module knows which elements are always empty, and silently drops any passed-in body. It also knows which elements require matching closing tags and which don't. However, it does not know what attributes are legal for which elements. - !ruby/struct:SM::Flow::P body: There are also some additional HTML generation methods mixed in from the CGI::HtmlExtension module. These include individual methods for the different types of form inputs, and methods for elements that commonly take particular attributes where the attributes can be directly specified as arguments, rather than via a hash. - !ruby/struct:SM::Flow::H level: 2 text: Examples of use - !ruby/struct:SM::Flow::H level: 3 text: Get form values - !ruby/struct:SM::Flow::VERB body: " require "cgi"\n cgi = CGI.new\n value = cgi['field_name'] # <== value string for 'field_name'\n # if not 'field_name' included, then return "".\n fields = cgi.keys # <== array of field names\n\n # returns true if form has 'field_name'\n cgi.has_key?('field_name')\n cgi.has_key?('field_name')\n cgi.include?('field_name')\n" - !ruby/struct:SM::Flow::P body: CAUTION! cgi['field_name'] returned an Array with the old cgi.rb(included in ruby 1.6) - !ruby/struct:SM::Flow::H level: 3 text: Get form values as hash - !ruby/struct:SM::Flow::VERB body: " require "cgi"\n cgi = CGI.new\n params = cgi.params\n" - !ruby/struct:SM::Flow::P body: cgi.params is a hash. - !ruby/struct:SM::Flow::VERB body: " cgi.params['new_field_name'] = ["value"] # add new param\n cgi.params['field_name'] = ["new_value"] # change value\n cgi.params.delete('field_name') # delete param\n cgi.params.clear # delete all params\n" - !ruby/struct:SM::Flow::H level: 3 text: Save form values to file - !ruby/struct:SM::Flow::VERB body: " require "pstore"\n db = PStore.new("query.db")\n db.transaction do\n db["params"] = cgi.params\n end\n" - !ruby/struct:SM::Flow::H level: 3 text: Restore form values from file - !ruby/struct:SM::Flow::VERB body: " require "pstore"\n db = PStore.new("query.db")\n db.transaction do\n cgi.params = db["params"]\n end\n" - !ruby/struct:SM::Flow::H level: 3 text: Get multipart form values - !ruby/struct:SM::Flow::VERB body: " require "cgi"\n cgi = CGI.new\n value = cgi['field_name'] # <== value string for 'field_name'\n value.read # <== body of value\n value.local_path # <== path to local file of value\n value.original_filename # <== original filename of value\n value.content_type # <== content_type of value\n" - !ruby/struct:SM::Flow::P body: and value has StringIO or Tempfile class methods. - !ruby/struct:SM::Flow::H level: 3 text: Get cookie values - !ruby/struct:SM::Flow::VERB body: " require "cgi"\n cgi = CGI.new\n values = cgi.cookies['name'] # <== array of 'name'\n # if not 'name' included, then return [].\n names = cgi.cookies.keys # <== array of cookie names\n" - !ruby/struct:SM::Flow::P body: and cgi.cookies is a hash. - !ruby/struct:SM::Flow::H level: 3 text: Get cookie objects - !ruby/struct:SM::Flow::VERB body: " require "cgi"\n cgi = CGI.new\n for name, cookie in cgi.cookies\n cookie.expires = Time.now + 30\n end\n cgi.out("cookie" => cgi.cookies) {"string"}\n\n cgi.cookies # { "name1" => cookie1, "name2" => cookie2, ... }\n\n require "cgi"\n cgi = CGI.new\n cgi.cookies['name'].expires = Time.now + 30\n cgi.out("cookie" => cgi.cookies['name']) {"string"}\n" - !ruby/struct:SM::Flow::H level: 3 text: Print http header and html string to $DEFAULT_OUTPUT ($>) - !ruby/struct:SM::Flow::VERB body: " require "cgi"\n cgi = CGI.new("html3") # add HTML generation methods\n cgi.out() do\n cgi.html() do\n cgi.head{ cgi.title{"TITLE"} } +\n cgi.body() do\n cgi.form() do\n cgi.textarea("get_text") +\n cgi.br +\n cgi.submit\n end +\n cgi.pre() do\n CGI::escapeHTML(\n "params: " + cgi.params.inspect + "\\n" +\n "cookies: " + cgi.cookies.inspect + "\\n" +\n ENV.collect() do |key, value|\n key + " --> " + value + "\\n"\n end.join("")\n )\n end\n end\n end\n end\n\n # add HTML generation methods\n CGI.new("html3") # html3.2\n CGI.new("html4") # html4.01 (Strict)\n CGI.new("html4Tr") # html4.01 Transitional\n CGI.new("html4Fr") # html4.01 Frameset\n" constants: - !ruby/object:RI::Constant comment: name: CR value: "\"\\015\"" - !ruby/object:RI::Constant comment: name: LF value: "\"\\012\"" - !ruby/object:RI::Constant comment: name: EOL value: CR + LF - !ruby/object:RI::Constant comment: name: RFC822_DAYS value: "%w[ Sun Mon Tue Wed Thu Fri Sat ]" - !ruby/object:RI::Constant comment: name: RFC822_MONTHS value: "%w[ Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec ]" full_name: CGI includes: [] instance_methods: - !ruby/object:RI::MethodSummary name: env_table - !ruby/object:RI::MethodSummary name: header - !ruby/object:RI::MethodSummary name: out - !ruby/object:RI::MethodSummary name: print - !ruby/object:RI::MethodSummary name: read_from_cmdline - !ruby/object:RI::MethodSummary name: stdinput - !ruby/object:RI::MethodSummary name: stdoutput name: CGI superclass: Object
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