Wiki source code of ERRest In Depth
Last modified by Pascal Robert on 2012/06/10 16:01
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author | version | line-number | content |
---|---|---|---|
1 | General architecture | ||
2 | Same Origin policy | ||
3 | Transactions | ||
4 | HTML vs other formats | ||
5 | Response representation | ||
6 | Missing route | ||
7 | Missing object | ||
8 | POJO objects | ||
9 | Headers | ||
10 | Caching | ||
11 | Adding new format | ||
12 | Security | ||
13 | strictMode | ||
14 | Workflow | ||
15 | Query arguments and RXRestFetchSpecification | ||
16 | ERXRestNameRegistry | ||
17 | MapClassDescription / NSDictionaryClassDescription | ||
18 | |||
19 | Calling an action goes like this: | ||
20 | |||
21 | {{code}} | ||
22 | |||
23 | Application.dispatchRequest -> | ||
24 | ERXRouteRequestHandler.handleRequest -> | ||
25 | ERXRouteRequestHandler._handleRequest -> | ||
26 | RestEntitiesController(ERXRouteController).performActionNamed(String actionName, false throwExceptions) -> | ||
27 | RestEntitiesController(ERXRouteController).performRouteActionNamed -> RestEntitiesController(ERXRouteController).performActionWithArguments(Method, Object...) -> | ||
28 | Method.invoke -> ... | ||
29 | RestEntitiesController.indexAction() | ||
30 | |||
31 | {{/code}} | ||
32 | |||
33 | performActionNamed: | ||
34 | |||
35 | {{code}} | ||
36 | |||
37 | if (transactionAdaptor.transactionsEnabled() && !transactionAdaptor.isExecutingTransaction(context(), request())) { | ||
38 | if (!transactionAdaptor.willHandleRequest(context(), request())) { | ||
39 | if (transactionAdaptor.didHandleRequest(context(), request())) { | ||
40 | results = stringResponse("Transaction request enqueued."); | ||
41 | } else { | ||
42 | results = stringResponse("Transaction executed."); | ||
43 | } | ||
44 | } | ||
45 | } | ||
46 | |||
47 | if (results == null) { | ||
48 | checkAccess(); | ||
49 | } | ||
50 | |||
51 | if (results == null && isAutomaticHtmlRoutingEnabled() && format() == ERXRestFormat.html()) { | ||
52 | results = performHtmlActionNamed(actionName); | ||
53 | } | ||
54 | |||
55 | if (results == null) { | ||
56 | results = performRouteActionNamed(actionName); | ||
57 | } | ||
58 | |||
59 | if (results == null) { | ||
60 | results = response(null, ERXKeyFilter.filterWithAttributes()); | ||
61 | } | ||
62 | else if (results instanceof IERXRouteComponent) { | ||
63 | _takeRouteParametersFromRequest(results); | ||
64 | } | ||
65 | |||
66 | {{/code}} | ||
67 | |||
68 | ERXRouteController.checkAccess() | ||
69 | |||
70 | Will do nothing by default. Override it to check for security. | ||
71 | |||
72 | {{code}} | ||
73 | |||
74 | protected void checkAccess() throws SecurityException { | ||
75 | } | ||
76 | |||
77 | {{/code}} | ||
78 | |||
79 | ERXRouteController.performHtmlActionNamed | ||
80 | |||
81 | {{code}} | ||
82 | protected WOActionResults performHtmlActionNamed(String actionName) throws Exception { | ||
83 | WOActionResults results = null; | ||
84 | |||
85 | String pageName = pageNameForAction(actionName); | ||
86 | if (_NSUtilities.classWithName(pageName) != null) { | ||
87 | try { | ||
88 | results = pageWithName(pageName); | ||
89 | if (!(results instanceof IERXRouteComponent)) { | ||
90 | log.error(pageName + " does not implement IERXRouteComponent, so it will be ignored."); | ||
91 | results = null; | ||
92 | } | ||
93 | } | ||
94 | catch (WOPageNotFoundException e) { | ||
95 | log.info(pageName + " does not exist, falling back to route controller."); | ||
96 | results = null; | ||
97 | } | ||
98 | } | ||
99 | else { | ||
100 | log.info(pageName + " does not exist, falling back to route controller."); | ||
101 | } | ||
102 | |||
103 | if (results == null && shouldFailOnMissingHtmlPage()) { | ||
104 | results = performUnknownAction(actionName); | ||
105 | } | ||
106 | |||
107 | return results; | ||
108 | } | ||
109 | {{/code}} | ||
110 | |||
111 | {{code}} | ||
112 | protected String pageNameForAction(String actionName) { | ||
113 | return entityName() + ERXStringUtilities.capitalize(actionName) + "Page"; | ||
114 | } | ||
115 | {{/code}} | ||
116 | |||
117 | {{code}} | ||
118 | |||
119 | protected boolean shouldFailOnMissingHtmlPage() { | ||
120 | return false; | ||
121 | } | ||
122 | |||
123 | {{/code}} | ||
124 | |||
125 | ERXRestUtils | ||
126 | |||
127 | request -> route | ||
128 | |||
129 | {{code}} | ||
130 | |||
131 | /** | ||
132 | * A NameFormat that behaves like Rails -- plural entities, plural routes, lowercase underscore names | ||
133 | * (names_like_this). | ||
134 | */ | ||
135 | public static NameFormat RAILS = new NameFormat(true, true, NameFormat.Case.LowercaseUnderscore); | ||
136 | |||
137 | /** | ||
138 | * A NameFormat that behaves like WO -- singular entities, singular routes, camel names (NamesLikeThis). | ||
139 | */ | ||
140 | public static NameFormat WO = new NameFormat(false, false, NameFormat.Case.CamelCase); | ||
141 | |||
142 | /** | ||
143 | * A NameFormat that behaves like WO -- singular entities, singular routes, lowercase camel names (namesLikeThis). | ||
144 | */ | ||
145 | public static NameFormat WO_LOWER = new NameFormat(false, false, NameFormat.Case.LowerCamelCase); | ||
146 | |||
147 | {{/code}} | ||
148 | |||
149 | * ERXRestContext | ||
150 | ** contains the editing context and an userInfo dictionnary | ||
151 | ** will be populated with er.rest.dateFormat, er.rest.timestampFormatter and er.rest.timestampFormat (read only for non-HTML responses) | ||
152 | *** want to change the time format for a specific controller? | ||
153 | ** {{code}} | ||
154 | protected ERXRestContext createRestContext() { | ||
155 | ERXRestContext restContext = new ERXRestContext(editingContext()); | ||
156 | restContext.setUserInfoForKey("yyyy-MM-dd", "er.rest.dateFormat"); | ||
157 | restContext.setUserInfoForKey("yyyy-MM-dd", "er.rest.timestampFormat"); | ||
158 | return restContext; | ||
159 | } | ||
160 | {{/code}}you just need to override createRestContext() in your controller if you want to add other stuff to the context (a user, etc.) | ||
161 | * Properties | ||
162 | ** ERXRest.idKey (ERXRestFormatDelegate) | ||
163 | *** (default "id") Override this property if you want to use a different key for the 'id' attribute~*~* ERXRest.typeKey | ||
164 | ** ERXRest.nilKey (ERXRestFormatDelegate) | ||
165 | ** ERXRest.writeNilKey (ERXRestFormatDelegate) | ||
166 | ** ERXRest.pluralEntityNames (ERXRestFormatDelegate) | ||
167 | ** ERXRest.writeTypeKey (ERXRestFormatDelegate) | ||
168 | ** ERXRest.suppressTypeAttributesForSimpleTypes (ERXXmlRestWriter) | ||
169 | *** (default "false") If set to true, primitive types, like type = "datetime", won't be added to the output | ||
170 | ** ERXRest.strictMode | ||
171 | *** In ERXMissingRouteController: (default "true") If set to true, status code in the response will be 405 Not Allowed, if set to false, status code will be 404 Not Found | ||
172 | *** In ERXRouteController: (default "true") If set to true, status code in the response will be 405 Not Allowed, if set to false, status code will be 404 Not Found | ||
173 | *** ERXRouteResults: (default "true") If set to true, creating a ressource will return status code 201 Created, if set to false, will return 200 OK | ||
174 | ** ERXRest.pluralEntityNames (ERXRouteRequestHandler) | ||
175 | ** ERXRest.routeCase (ERXRouteRequestHandler) | ||
176 | ** ERXRest.lowercaseEntityNames (ERXRouteRequestHandler) | ||
177 | ** ERXRest.parseUnknownExtensions (ERXRouteRequestHandler) | ||
178 | *** (default "true") If set to "false", will return a 404 status code if the format doesn't exist | ||
179 | ** ERXRest.missingControllerName (ERXRouteRequestHandler) | ||
180 | *** (default "ERXMissingRouteController") Allow you to specify which controller to use when a route doesn't exist | ||
181 | ** er.rest.rfcDateFormat | ||
182 | ** er.rest.dateFormat | ||
183 | ** er.rest.dateFormat.primary | ||
184 | ** er.rest.dateFormat.secondary | ||
185 | ** er.rest.dateFormatter | ||
186 | ** er.rest.timestampFormat | ||
187 | ** er.rest.timestampFormat.primary | ||
188 | ** er.rest.timestampFormat.secondary | ||
189 | ** er.rest.timestampFormatter | ||
190 | ** er.rest.rfcDateFormat | ||
191 | ** er.rest.jodaTime | ||
192 | ** ERXRest.transactionsEnabled (default 'false') ERXRestTransactionRequestAdaptor | ||
193 | ** ERXRest.maxEventsPerTransaction (default '50') ERXRestTransactionRequestAdaptor | ||
194 | ** ERXRest.accessControlAllowRequestHeaders (ERXRouteController) | ||
195 | ** ERXRest.accessControlAllowRequestMethods (ERXRouteController) | ||
196 | ** ERXRest.defaultFormat (ERXRouteController) | ||
197 | *** (default "xml") Allow you to set the default format for all of your REST controllers | ||
198 | ** ERXRest.allowWindowNameCrossDomainTransport (ERXRouteController) | ||
199 | ** ERXRest.accessControlMaxAge (ERXRouteController) | ||
200 | *** (default 1728000) This header indicates how long the results of a preflight request can be cached. For an example of a preflight request, see the above examples. | ||
201 | ** ERXRest.accessControlAllowOrigin (ERXRouteController) | ||
202 | *** Set the value to '*' to enable all origins. See [[https:~~/~~/developer.mozilla.org/En/HTTP_access_control#Access-Control-Allow-Origin>>url:https://developer.mozilla.org/En/HTTP_access_control#Access-Control-Allow-Origin||shape="rect"]] | ||
203 | * JSON Schema | ||
204 | ** | ||
205 | |||
206 | {{code}} | ||
207 | |||
208 | /something?schema=true | ||
209 | |||
210 | public WOActionResults indexAction() { | ||
211 | if (isSchemaRequest()) { | ||
212 | return schemaResponse(showFilter()); | ||
213 | } | ||
214 | protected boolean isSchemaRequest() { | ||
215 | return request().stringFormValueForKey("schema") != null; | ||
216 | } | ||
217 | |||
218 | {{/code}} | ||
219 | |||
220 | Application(ERXApplication).dispatchRequest(WORequest) line: 2051 | ||
221 | ERXRouteRequestHandler(WOActionRequestHandler)._handleRequest(WORequest) line: 221 | ||
222 | ERXRouteRequestHandler.getRequestHandlerPathForRequest(WORequest) line: 782 | ||
223 | |||
224 | ERXRouteRequestHandler(WOActionRequestHandler)._handleRequest(WORequest) line: 259 | ||
225 | PagesController(ERXRouteController).performActionNamed(String) line: 1328 | ||
226 | PagesController(ERXRouteController).performActionNamed(String, boolean) line: 1385 | ||
227 | PagesController(ERXRouteController).performRouteActionNamed(String) line: 1510 | ||
228 | PagesController(ERXRouteController).performActionWithArguments(Method, Object...) line: 1559 | ||
229 | ... | ||
230 | PagesController.mainPageAction() line: 20 | ||
231 | |||
232 | == ERXRouteRequestHandler == | ||
233 | |||
234 | |((( | ||
235 | **Properties** | ||
236 | ))) | ||
237 | |((( | ||
238 | ERXRest.missingControllerName | ||
239 | )))|((( | ||
240 | (default "ERXMissingRouteController") | ||
241 | |||
242 | ))) | ||
243 | |((( | ||
244 | ERXRest.parseUnknownExtensions | ||
245 | )))|((( | ||
246 | ERXRest.parseUnknownExtensions | ||
247 | |||
248 | ))) | ||
249 | |((( | ||
250 | ERXRest.pluralEntityNames | ||
251 | )))|((( | ||
252 | ERXRest.pluralEntityNames | ||
253 | |||
254 | ))) | ||
255 | |((( | ||
256 | ERXRest.routeCase | ||
257 | )))|((( | ||
258 | ERXRest.routeCase | ||
259 | |||
260 | ))) | ||
261 | |((( | ||
262 | ERXRest.lowercaseEntityNames | ||
263 | )))|((( | ||
264 | ERXRest.lowercaseEntityNames | ||
265 | ))) | ||
266 | |||
267 | ERXMissingRouteController is the controller that is used when no route can be found. It's "missing" action is loaded. | ||
268 | |||
269 | |((( | ||
270 | **Properties** | ||
271 | ))) | ||
272 | |((( | ||
273 | ERXRest.strictMode | ||
274 | )))|((( | ||
275 | ERXRest.strictMode | ||
276 | |||
277 | ))) | ||
278 | |||
279 | ERXRouteController |