| 1 | ;;+----------------------------------------------------------------------------- |
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| 2 | ;;+ Isidorus |
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| 3 | ;;+ (c) 2008-2009 Marc Kuester, Christoph Ludwig, Lukas Giessmann |
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| 4 | ;;+ |
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| 5 | ;;+ Isidorus is freely distributable under the LGPL license. |
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| 6 | ;;+ You can find a detailed description in trunk/docs/LGPL-LICENSE.txt. |
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| 7 | ;;+----------------------------------------------------------------------------- |
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| 8 | |
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| 9 | |
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| 10 | (in-package :rest-interface) |
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| 11 | |
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| 12 | (defparameter *json-get-prefix* "/json/get/(.+)$") ;the prefix to get a fragment by the psi -> localhost:8000/json/get/<fragment-psi> |
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| 13 | (defparameter *get-rdf-prefix* "/json/get/rdf/(.+)$") ;the prefix to get a fragment by the psi -> localhost:8000/json/rdf/get/<fragment-psi> |
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| 14 | (defparameter *json-commit-url* "/json/commit/?$") ;the url to commit a json fragment by "put" or "post" |
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| 15 | (defparameter *json-get-all-psis* "/json/psis/?$") ;the url to get all topic psis of isidorus -> localhost:8000/json/psis |
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| 16 | (defparameter *json-get-summary-url* "/json/summary/?$") ;the url to get a summary of all topic stored in isidorus; you have to set the GET-parameter "start" for the start index of all topics within elephant and the GET-paramter "end" for the last index of the topic sequence -> http://localhost:8000/json/summary/?start=12&end=13 |
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| 17 | (defparameter *json-get-all-type-psis* "/json/tmcl/types/?$") ;returns a list of all psis that can be a type |
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| 18 | (defparameter *json-get-all-instance-psis* "/json/tmcl/instances/?$") ;returns a list of all psis that belongs to a valid topic-instance |
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| 19 | (defparameter *json-get-topic-stub-prefix* "/json/topicstubs/(.+)$") ;the json prefix for getting some topic stub information of a topic |
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| 20 | (defparameter *json-get-type-tmcl-url* "/json/tmcl/type/?$") ;the json url for getting some tmcl information of a topic treated as a type |
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| 21 | (defparameter *json-get-instance-tmcl-url* "/json/tmcl/instance/?$") ;the json url for getting some tmcl information of a topic treated as an instance |
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| 22 | (defparameter *json-get-overview* "/json/tmcl/overview/?$") ; returns a json-object representing a tree view |
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| 23 | (defparameter *ajax-user-interface-url* "/isidorus") ;the url to the user interface; |
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| 24 | (defparameter *ajax-user-interface-css-prefix* "/css") ;the url to the css files of the user interface |
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| 25 | (defparameter *ajax-user-interface-css-directory-path* "ajax/css") ;the directory contains the css files |
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| 26 | (defparameter *ajax-user-interface-file-path* "ajax/isidorus.html") ;the file path to the HTML file implements the user interface |
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| 27 | (defparameter *ajax-javascript-directory-path* "ajax/javascripts") ;the directory which contains all necessary javascript files |
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| 28 | (defparameter *ajax-javascript-url-prefix* "/javascripts") ; the url prefix of all javascript files |
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| 29 | |
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| 30 | (defun set-up-json-interface (&key (json-get-prefix *json-get-prefix*) |
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| 31 | (get-rdf-prefix *get-rdf-prefix*) |
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| 32 | (json-get-all-psis *json-get-all-psis*) |
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| 33 | (json-commit-url *json-commit-url*) |
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| 34 | (json-get-summary-url *json-get-summary-url*) |
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| 35 | (json-get-all-type-psis *json-get-all-type-psis*) |
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| 36 | (json-get-all-instance-psis *json-get-all-instance-psis*) |
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| 37 | (json-get-topic-stub-prefix *json-get-topic-stub-prefix*) |
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| 38 | (json-get-type-tmcl-url *json-get-type-tmcl-url*) |
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| 39 | (json-get-instance-tmcl-url *json-get-instance-tmcl-url*) |
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| 40 | (json-get-overview *json-get-overview*) |
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| 41 | (ajax-user-interface-url *ajax-user-interface-url*) |
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| 42 | (ajax-user-interface-file-path *ajax-user-interface-file-path*) |
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| 43 | (ajax-user-interface-css-prefix *ajax-user-interface-css-prefix*) |
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| 44 | (ajax-user-interface-css-directory-path *ajax-user-interface-css-directory-path*) |
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| 45 | (ajax-javascripts-directory-path *ajax-javascript-directory-path*) |
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| 46 | (ajax-javascripts-url-prefix *ajax-javascript-url-prefix*)) |
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| 47 | "registers the json im/exporter to the passed base-url in hunchentoot's dispatch-table |
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| 48 | and also registers a file-hanlder to the html-user-interface" |
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| 49 | |
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| 50 | ;; registers the http-code 500 for an internal server error to the standard |
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| 51 | ;; return codes. so there won't be attached a hunchentoot default message, |
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| 52 | ;; this is necessary to be able to send error messages in an individual way/syntax |
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| 53 | ;; e.g. a json error-message. |
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| 54 | (push hunchentoot:+http-internal-server-error+ hunchentoot:*approved-return-codes*) |
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| 55 | ;; === html and css files ==================================================== |
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| 56 | (push |
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| 57 | (create-static-file-dispatcher-and-handler ajax-user-interface-url ajax-user-interface-file-path "text/html") |
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| 58 | hunchentoot:*dispatch-table*) |
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| 59 | |
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| 60 | (dolist (script-path-and-url (make-file-path-and-url ajax-user-interface-css-directory-path ajax-user-interface-css-prefix)) |
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| 61 | (let ((script-path (getf script-path-and-url :path)) |
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| 62 | (script-url (getf script-path-and-url :url))) |
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| 63 | (push |
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| 64 | (create-static-file-dispatcher-and-handler script-url script-path) |
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| 65 | hunchentoot:*dispatch-table*))) |
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| 66 | |
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| 67 | |
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| 68 | ;; === ajax frameworks and javascript files ================================== |
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| 69 | (dolist (script-path-and-url (make-file-path-and-url ajax-javascripts-directory-path ajax-javascripts-url-prefix)) |
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| 70 | (let ((script-path (getf script-path-and-url :path)) |
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| 71 | (script-url (getf script-path-and-url :url))) |
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| 72 | (push |
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| 73 | (create-static-file-dispatcher-and-handler script-url script-path) |
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| 74 | hunchentoot:*dispatch-table*))) |
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| 75 | |
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| 76 | |
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| 77 | ;; === rest interface ======================================================== |
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| 78 | (push |
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| 79 | (create-regex-dispatcher json-get-all-psis #'return-all-topic-psis) |
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| 80 | hunchentoot:*dispatch-table*) |
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| 81 | (push |
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| 82 | (create-regex-dispatcher json-get-prefix #'return-json-fragment) |
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| 83 | hunchentoot:*dispatch-table*) |
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| 84 | (push |
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| 85 | (create-regex-dispatcher get-rdf-prefix #'return-json-rdf-fragment) |
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| 86 | hunchentoot:*dispatch-table*) |
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| 87 | (push |
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| 88 | (create-regex-dispatcher json-get-topic-stub-prefix #'return-topic-stub-of-psi) |
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| 89 | hunchentoot:*dispatch-table*) |
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| 90 | (push |
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| 91 | (create-regex-dispatcher json-get-all-type-psis #'return-all-tmcl-types) |
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| 92 | hunchentoot:*dispatch-table*) |
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| 93 | (push |
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| 94 | (create-regex-dispatcher json-get-all-instance-psis #'return-all-tmcl-instances) |
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| 95 | hunchentoot:*dispatch-table*) |
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| 96 | (push |
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| 97 | (create-regex-dispatcher json-get-type-tmcl-url #'(lambda(&optional param) |
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| 98 | (declare (ignorable param)) |
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| 99 | (return-tmcl-info-of-psis 'json-tmcl::type))) |
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| 100 | hunchentoot:*dispatch-table*) |
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| 101 | (push |
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| 102 | (create-regex-dispatcher json-get-instance-tmcl-url #'(lambda(&optional param) |
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| 103 | (declare (ignorable param)) |
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| 104 | (return-tmcl-info-of-psis 'json-tmcl::instance))) |
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| 105 | hunchentoot:*dispatch-table*) |
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| 106 | (push |
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| 107 | (create-regex-dispatcher json-get-overview #'return-overview) |
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| 108 | hunchentoot:*dispatch-table*) |
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| 109 | (push |
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| 110 | (create-regex-dispatcher json-commit-url #'json-commit) |
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| 111 | hunchentoot:*dispatch-table*) |
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| 112 | (push |
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| 113 | (create-regex-dispatcher json-get-summary-url #'return-topic-summaries) |
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| 114 | hunchentoot:*dispatch-table*)) |
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| 115 | |
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| 116 | ;; ============================================================================= |
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| 117 | ;; --- some handlers for the json-rest-interface ------------------------------- |
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| 118 | ;; ============================================================================= |
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| 119 | (defun return-all-tmcl-types(&optional param) |
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| 120 | "Returns all topic-psi that are valid types -> so they have to be valid to the |
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| 121 | topictype-constraint (if it exists) and the can't be abstract." |
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| 122 | (declare (ignorable param)) |
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| 123 | (handler-case (let ((topic-types |
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| 124 | (with-reader-lock |
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| 125 | (json-tmcl::return-all-tmcl-types :revision 0)))) |
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| 126 | (setf (hunchentoot:content-type*) "application/json") ;RFC 4627 |
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| 127 | (json:encode-json-to-string |
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| 128 | (map 'list #'(lambda(y) |
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| 129 | (map 'list #'uri y)) |
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| 130 | (map 'list #'psis topic-types)))) |
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| 131 | (condition (err) (progn |
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| 132 | (setf (hunchentoot:return-code*) hunchentoot:+http-internal-server-error+) |
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| 133 | (setf (hunchentoot:content-type*) "text") |
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| 134 | (format nil "Condition: \"~a\"" err))))) |
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| 135 | |
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| 136 | |
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| 137 | (defun return-all-tmcl-instances(&optional param) |
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| 138 | "Returns all topic-psis that are valid instances of any topic type. |
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| 139 | The validity is only oriented on the typing of topics, e.g. |
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| 140 | type-instance or supertype-subtype." |
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| 141 | (declare (ignorable param)) |
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| 142 | (handler-case (let ((topic-instances |
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| 143 | (with-reader-lock |
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| 144 | (json-tmcl::return-all-tmcl-instances :revision 0)))) |
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| 145 | (setf (hunchentoot:content-type*) "application/json") ;RFC 4627 |
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| 146 | (json:encode-json-to-string |
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| 147 | (map 'list #'(lambda(y) |
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| 148 | (map 'list #'uri y)) |
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| 149 | (map 'list #'psis topic-instances)))) |
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| 150 | (condition (err) (progn |
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| 151 | (setf (hunchentoot:return-code*) hunchentoot:+http-internal-server-error+) |
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| 152 | (setf (hunchentoot:content-type*) "text") |
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| 153 | (format nil "Condition: \"~a\"" err))))) |
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| 154 | |
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| 155 | |
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| 156 | (defun return-topic-stub-of-psi(&optional psi) |
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| 157 | "Returns a json string of a topic depending on the |
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| 158 | passed psi as a topic-stub-construct." |
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| 159 | (assert psi) |
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| 160 | (let ((topic (d:get-item-by-psi psi))) |
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| 161 | (if topic |
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| 162 | (let ((topic-json |
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| 163 | (handler-case |
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| 164 | (with-reader-lock |
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| 165 | (json-exporter::to-json-topicStub-string topic :revision 0)) |
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| 166 | (condition (err) (progn |
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| 167 | (setf (hunchentoot:return-code*) hunchentoot:+http-internal-server-error+) |
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| 168 | (setf (hunchentoot:content-type*) "text") |
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| 169 | (format nil "Condition: \"~a\"" err)))))) |
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| 170 | (setf (hunchentoot:content-type*) "application/json") ;RFC 4627 |
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| 171 | topic-json) |
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| 172 | (progn |
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| 173 | (setf (hunchentoot:return-code*) hunchentoot:+http-not-found+) |
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| 174 | (setf (hunchentoot:content-type*) "text") |
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| 175 | (format nil "Condition: Topic \"~a\" not found" psi))))) |
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| 176 | |
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| 177 | |
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| 178 | (defun return-tmcl-info-of-psis(treat-as) |
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| 179 | "Returns a json string which represents the defined tmcl-constraints of the |
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| 180 | topic and the associations where this topic can be a player." |
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| 181 | (let ((http-method (hunchentoot:request-method*))) |
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| 182 | (if (or (eq http-method :POST) |
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| 183 | (eq http-method :PUT)) |
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| 184 | (let ((external-format |
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| 185 | (flexi-streams:make-external-format :UTF-8 :eol-style :LF))) |
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| 186 | (let ((json-data |
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| 187 | (hunchentoot:raw-post-data :external-format external-format |
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| 188 | :force-text t))) |
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| 189 | (handler-case |
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| 190 | (let ((psis |
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| 191 | (json:decode-json-from-string json-data))) |
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| 192 | (let ((tmcl |
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| 193 | (with-reader-lock |
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| 194 | (json-tmcl:get-constraints-of-fragment |
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| 195 | psis :treat-as treat-as :revision 0)))) |
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| 196 | (if tmcl |
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| 197 | (progn |
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| 198 | (setf (hunchentoot:content-type*) |
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| 199 | "application/json") ;RFC 4627 |
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| 200 | tmcl) |
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| 201 | (progn |
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| 202 | (setf (hunchentoot:return-code*) |
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| 203 | hunchentoot:+http-not-found+) |
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| 204 | (setf (hunchentoot:content-type*) "text") |
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| 205 | (format nil "Topic \"~a\" not found." psis))))) |
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| 206 | (condition (err) |
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| 207 | (progn |
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| 208 | (setf (hunchentoot:return-code*) |
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| 209 | hunchentoot:+http-internal-server-error+) |
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| 210 | (setf (hunchentoot:content-type*) "text") |
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| 211 | (format nil "Condition: \"~a\"" err)))))) |
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| 212 | (setf (hunchentoot:return-code*) hunchentoot:+http-bad-request+)))) |
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| 213 | |
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| 214 | |
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| 215 | (defun return-all-topic-psis (&optional param) |
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| 216 | "return all psis currently existing in isidorus as a list of list. every topic is a list |
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| 217 | of psis and the entire list contains a list of topics" |
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| 218 | (declare (ignorable param)) |
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| 219 | (let ((http-method (hunchentoot:request-method*))) |
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| 220 | (if (eq http-method :GET) |
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| 221 | (progn |
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| 222 | (setf (hunchentoot:content-type*) "application/json") ;RFC 4627 |
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| 223 | (handler-case (with-reader-lock |
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| 224 | (get-all-topic-psis :revision 0)) |
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| 225 | (condition (err) (progn |
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| 226 | (setf (hunchentoot:return-code*) hunchentoot:+http-internal-server-error+) |
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| 227 | (setf (hunchentoot:content-type*) "text") |
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| 228 | (format nil "Condition: \"~a\"" err))))) |
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| 229 | (setf (hunchentoot:return-code*) hunchentoot:+http-bad-request+)))) |
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| 230 | |
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| 231 | |
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| 232 | (defun return-json-fragment(&optional psi) |
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| 233 | "returns the json-fragmen belonging to the psi passed by the parameter psi" |
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| 234 | (assert psi) |
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| 235 | (let ((http-method (hunchentoot:request-method*))) |
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| 236 | (if (eq http-method :GET) |
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| 237 | (let ((identifier (string-replace psi "%23" "#"))) |
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| 238 | (setf (hunchentoot:content-type*) "application/json") ;RFC 4627 |
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| 239 | (let ((fragment |
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| 240 | (with-reader-lock |
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| 241 | (get-latest-fragment-of-topic identifier)))) |
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| 242 | (if fragment |
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| 243 | (handler-case (with-reader-lock |
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| 244 | (to-json-string fragment :revision 0)) |
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| 245 | (condition (err) |
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| 246 | (progn |
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| 247 | (setf (hunchentoot:return-code*) hunchentoot:+http-internal-server-error+) |
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| 248 | (setf (hunchentoot:content-type*) "text") |
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| 249 | (format nil "Condition: \"~a\"" err)))) |
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| 250 | (progn |
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| 251 | (setf (hunchentoot:return-code*) hunchentoot:+http-not-found+) |
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| 252 | (setf (hunchentoot:content-type*) "text") |
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| 253 | (format nil "Topic \"~a\" not found" psi))))) |
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| 254 | (setf (hunchentoot:return-code*) hunchentoot:+http-bad-request+)))) |
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| 255 | |
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| 256 | |
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| 257 | (defun return-json-rdf-fragment(&optional psi) |
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| 258 | "returns the json-fragmen belonging to the psi passed by the parameter psi" |
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| 259 | (assert psi) |
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| 260 | (let ((http-method (hunchentoot:request-method*))) |
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| 261 | (if (eq http-method :GET) |
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| 262 | (let ((identifier (string-replace psi "%23" "#"))) |
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| 263 | (setf (hunchentoot:content-type*) "application/json") ;RFC 4627 |
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| 264 | (let ((fragment |
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| 265 | (with-reader-lock |
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| 266 | (get-latest-fragment-of-topic identifier)))) |
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| 267 | (if fragment |
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| 268 | (handler-case (with-reader-lock |
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| 269 | (rdf-exporter:to-rdf-string fragment)) |
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| 270 | (condition (err) |
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| 271 | (progn |
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| 272 | (setf (hunchentoot:return-code*) hunchentoot:+http-internal-server-error+) |
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| 273 | (setf (hunchentoot:content-type*) "text") |
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| 274 | (format nil "Condition: \"~a\"" err)))) |
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| 275 | (progn |
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| 276 | (setf (hunchentoot:return-code*) hunchentoot:+http-not-found+) |
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| 277 | (setf (hunchentoot:content-type*) "text") |
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| 278 | (format nil "Topic \"~a\" not found" psi))))) |
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| 279 | (setf (hunchentoot:return-code*) hunchentoot:+http-bad-request+)))) |
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| 280 | |
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| 281 | |
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| 282 | (defun json-commit(&optional param) |
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| 283 | "calls the json-to-elem method for a json-fragment and imports it to elephant" |
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| 284 | (declare (ignorable param)) ;param is currently not used |
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| 285 | (let ((http-method (hunchentoot:request-method*))) |
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| 286 | (if (or (eq http-method :PUT) |
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| 287 | (eq http-method :POST)) |
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| 288 | (let ((external-format (flexi-streams:make-external-format :UTF-8 :eol-style :LF))) |
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| 289 | (let ((json-data (hunchentoot:raw-post-data :external-format external-format :force-text t))) |
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| 290 | (handler-case (with-writer-lock |
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| 291 | (json-importer:json-to-elem json-data)) |
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| 292 | (condition (err) |
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| 293 | (progn |
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| 294 | (setf (hunchentoot:return-code*) hunchentoot:+http-internal-server-error+) |
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| 295 | (setf (hunchentoot:content-type*) "text") |
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| 296 | (format nil "Condition: \"~a\"" err)))))) |
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| 297 | (setf (hunchentoot:return-code*) hunchentoot:+http-bad-request+)))) |
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| 298 | |
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| 299 | |
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| 300 | (defun return-topic-summaries(&optional param) |
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| 301 | "returns a summary of the requested topics" |
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| 302 | (declare (ignorable param)) |
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| 303 | (let ((start-idx |
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| 304 | (handler-case (parse-integer (hunchentoot:get-parameter "start")) |
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| 305 | (condition () 0))) |
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| 306 | (end-idx |
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| 307 | (handler-case (parse-integer (hunchentoot:get-parameter "end")) |
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| 308 | (condition () nil)))) |
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| 309 | (handler-case (with-reader-lock |
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| 310 | (let ((topics |
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| 311 | (elephant:get-instances-by-class 'd:TopicC))) |
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| 312 | (let ((end |
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| 313 | (cond |
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| 314 | ((not end-idx) |
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| 315 | (length topics)) |
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| 316 | ((> end-idx (length topics)) |
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| 317 | (length topics)) |
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| 318 | ((< end-idx 0) |
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| 319 | 0) |
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| 320 | (t |
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| 321 | end-idx)))) |
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| 322 | (let ((start |
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| 323 | (cond |
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| 324 | ((> start-idx (length topics)) |
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| 325 | end) |
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| 326 | ((< start-idx 0) |
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| 327 | 0) |
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| 328 | (t |
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| 329 | start-idx)))) |
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| 330 | (let ((topics-in-range |
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| 331 | (if (<= start end) |
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| 332 | (subseq topics start end) |
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| 333 | (reverse (subseq topics end start))))) |
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| 334 | (setf (hunchentoot:content-type*) "application/json") ;RFC 4627 |
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| 335 | (json-exporter:make-topic-summary topics-in-range)))))) |
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| 336 | (condition (err) (progn |
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| 337 | (setf (hunchentoot:return-code*) hunchentoot:+http-internal-server-error+) |
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| 338 | (setf (hunchentoot:content-type*) "text") |
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| 339 | (format nil "Condition: \"~a\"" err)))))) |
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| 340 | |
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| 341 | |
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| 342 | (defun return-overview (&optional param) |
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| 343 | "Returns a json-object representing a topic map overview as a tree(s)" |
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| 344 | (declare (ignorable param)) |
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| 345 | (with-reader-lock |
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| 346 | (handler-case |
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| 347 | (let ((json-string |
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| 348 | (json-tmcl::tree-view-to-json-string |
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| 349 | (json-tmcl::make-tree-view :revision 0)))) |
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| 350 | (setf (hunchentoot:content-type*) "application/json") ;RFC 4627 |
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| 351 | json-string) |
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| 352 | (Condition (err) |
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| 353 | (progn |
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| 354 | (setf (hunchentoot:return-code*) hunchentoot:+http-internal-server-error+) |
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| 355 | (setf (hunchentoot:content-type*) "text") |
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| 356 | (format nil "Condition: \"~a\"" err)))))) |
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| 357 | |
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| 358 | |
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| 359 | ;; ============================================================================= |
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| 360 | ;; --- some helper functions --------------------------------------------------- |
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| 361 | ;; ============================================================================= |
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| 362 | (defun make-file-path-and-url (path-to-files-directory url-prefix) |
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| 363 | "returns a list of lists which contains an absolute file path and a file-url |
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| 364 | concatenated of the url-prefix and the relative path of all all files in the |
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| 365 | passed directory and its subdirectories" |
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| 366 | (let ((start-position-of-relative-path |
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| 367 | (- (length (write-to-string (com.gigamonkeys.pathnames:file-exists-p |
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| 368 | path-to-files-directory))) 2))) |
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| 369 | (let ((files-and-urls nil)) |
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| 370 | (com.gigamonkeys.pathnames:walk-directory |
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| 371 | path-to-files-directory |
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| 372 | #'(lambda(current-path) |
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| 373 | (let ((current-path-string |
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| 374 | (write-to-string current-path))) |
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| 375 | (let ((last-position-of-current-path |
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| 376 | (- (length current-path-string) 1))) |
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| 377 | (let ((current-url |
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| 378 | (concatenate |
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| 379 | 'string url-prefix |
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| 380 | (subseq current-path-string start-position-of-relative-path |
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| 381 | last-position-of-current-path)))) |
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| 382 | (push (list :path current-path :url current-url) files-and-urls)))))) |
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| 383 | files-and-urls))) |
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| 384 | |
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| 385 | |
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| 386 | (defun string-replace (str search-str replace-str) |
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| 387 | "replaces all sub-strings in str of the form search-str with |
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| 388 | the string replace-str and returns the new generated string" |
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| 389 | (if (= (length search-str) 0) |
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| 390 | str |
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| 391 | (progn |
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| 392 | (let ((ret-str "") |
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| 393 | (idx 0)) |
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| 394 | (loop |
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| 395 | (if (string= str search-str |
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| 396 | :start1 idx |
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| 397 | :end1 (min (length str) |
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| 398 | (+ idx (length search-str)))) |
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| 399 | (progn |
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| 400 | (setf ret-str (concatenate 'string ret-str replace-str)) |
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| 401 | (incf idx (length search-str))) |
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| 402 | (progn |
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| 403 | (setf ret-str (concatenate 'string ret-str (subseq str idx (1+ idx)))) |
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| 404 | (incf idx))) |
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| 405 | (unless (< idx (length str)) |
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| 406 | (return ret-str))))))) |
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