mirror of https://gitee.com/bigwinds/arangodb
592 lines
19 KiB
JavaScript
592 lines
19 KiB
JavaScript
////////////////////////////////////////////////////////////////////////////////
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/// @brief JavaScript actions modules
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///
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/// @file
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///
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/// DISCLAIMER
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///
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/// Copyright 2012 triagens GmbH, Cologne, Germany
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///
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/// Licensed under the Apache License, Version 2.0 (the "License");
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/// you may not use this file except in compliance with the License.
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/// You may obtain a copy of the License at
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///
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/// http://www.apache.org/licenses/LICENSE-2.0
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///
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/// Unless required by applicable law or agreed to in writing, software
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/// distributed under the License is distributed on an "AS IS" BASIS,
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/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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/// See the License for the specific language governing permissions and
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/// limitations under the License.
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///
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/// Copyright holder is triAGENS GmbH, Cologne, Germany
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///
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/// @author Dr. Frank Celler
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/// @author Copyright 2012, triAGENS GmbH, Cologne, Germany
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////////////////////////////////////////////////////////////////////////////////
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var internal = require("internal");
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var console = require("console");
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// -----------------------------------------------------------------------------
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// --SECTION-- public functions
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// -----------------------------------------------------------------------------
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////////////////////////////////////////////////////////////////////////////////
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/// @addtogroup ArangoActions
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/// @{
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////////////////////////////////////////////////////////////////////////////////
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////////////////////////////////////////////////////////////////////////////////
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/// @brief returns a result of a query as documents
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///
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/// @FUN{actions.defineHttp(@FA{options})}
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///
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/// Defines a new action. The @FA{options} are as follows:
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///
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/// @FA{options.url}
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///
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/// The URL, which can be used to access the action. This path might contain
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/// slashes. Note that this action will also be called, if a url is given such that
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/// @FA{options.url} is a prefix of the given url and no longer definition
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/// matches.
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///
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/// @FA{options.prefix}
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///
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/// If @LIT{false}, then only use the action for excat matches. The default is
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/// @LIT{true}.
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///
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/// @FA{options.context}
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///
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/// The context to which this actions belongs. Possible values are "admin",
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/// "monitoring", "api", and "user". All contexts apart from "user" are reserved
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/// for system actions and are database independent. All actions except "user"
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/// and "api" are executed in a different worker queue than the normal queue for
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/// clients. The "api" actions are used by the client api to communicate with
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/// the ArangoDB server. Both the "api" and "user" actions are using the same
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/// worker queue.
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///
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/// It is possible to specify a list of contexts, in case an actions belongs to
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/// more than one context.
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///
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/// Note that the url for "user" actions is automatically prefixed
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/// with @LIT{_action}. This applies to all specified contexts. For example, if
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/// the context contains "admin" and "user" and the url is @LIT{hallo}, then the
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/// action is accessible under @LIT{/_action/hallo} - even for the admin context.
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///
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/// @FA{options.callback}(@FA{request}, @FA{response})
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///
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/// The request argument contains a description of the request. A request
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/// parameter @LIT{foo} is accessible as @LIT{request.parametrs.foo}. A request
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/// header @LIT{bar} is accessible as @LIT{request.headers.bar}. Assume that
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/// the action is defined for the url @LIT{/foo/bar} and the request url is
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/// @LIT{/foo/bar/hugo/egon}. Then the suffix parts @LIT{[ "hugon"\, "egon" ]}
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/// are availible in @LIT{request.suffix}.
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///
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/// The callback must define fill the @FA{response}.
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///
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/// - @LIT{@FA{response}.responseCode}: the response code
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/// - @LIT{@FA{response}.contentType}: the content type of the response
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/// - @LIT{@FA{response}.body}: the body of the response
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///
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/// You can use the functions @FN{ResultOk} and @FN{ResultError} to easily
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/// generate a response.
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///
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/// @FA{options.parameters}
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///
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/// Normally the parameters are passed to the callback as strings. You can
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/// use the @FA{options}, to force a converstion of the parameter to
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///
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/// - @c "collection"
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/// - @c "collection-identifier"
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/// - @c "collection-name"
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/// - @c "number"
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/// - @c "string"
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////////////////////////////////////////////////////////////////////////////////
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function DefineHttp (options) {
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var url = options.url;
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var contexts = options.context;
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var callback = options.callback;
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var parameters = options.parameters;
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var prefix = true;
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var userContext = false;
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if (! contexts) {
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contexts = "user";
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}
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if (typeof contexts === "string") {
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if (contexts === "user") {
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userContext = true;
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}
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contexts = [ contexts ];
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}
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else {
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for (var i = 0; i < contexts.length && ! userContext; ++i) {
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if (context === "user") {
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userContext = true;
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}
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}
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}
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if (userContext) {
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url = "_action/" + url;
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}
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if (typeof callback !== "function") {
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console.error("callback for '%s' must be a function, got '%s'", url + (typeof callback));
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return;
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}
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if (options.hasOwnProperty("prefix")) {
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prefix = options.prefix;
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}
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var parameter = { parameters : parameters, prefix : prefix };
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// console.debug("callback: %s", callback);
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for (var i = 0; i < contexts.length; ++i) {
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var context = contexts[i];
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var use = (internal.allowedActionContexts[context] === true)
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if (use) {
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try {
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internal.defineAction(url, callback, parameter);
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console.debug("defining action '%s' in context '%s' using queue '%s'", url, context, SYS_ACTION_QUEUE);
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}
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catch (err) {
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console.error("action '%s' encountered error: %s", url, err);
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}
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}
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else {
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console.debug("ignoring '%s' for context '%s' in queue '%s'", url, context, SYS_ACTION_QUEUE);
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}
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}
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief get an error message string for an error code
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///
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/// @FUN{actions.getErrorMessage(@FA{code})}
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///
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/// Returns the error message for an error code.
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////////////////////////////////////////////////////////////////////////////////
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function GetErrorMessage (code) {
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for (var key in internal.errors) {
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if (internal.errors.hasOwnProperty(key)) {
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if (internal.errors[key].code === code) {
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return internal.errors[key].message;
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}
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}
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}
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return "";
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief extracts the body as json
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////////////////////////////////////////////////////////////////////////////////
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function GetJsonBody (req, res, code) {
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var body;
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try {
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body = JSON.parse(req.requestBody || "{}") || {};
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}
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catch (err) {
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ResultBad(req, res, exports.ERROR_HTTP_CORRUPTED_JSON, err);
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return undefined;
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}
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if (! body || ! (body instanceof Object)) {
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if (code === undefined) {
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code = exports.ERROR_HTTP_CORRUPTED_JSON;
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}
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ResultBad(req, res, code, err);
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return undefined;
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}
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return body;
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief generates an error
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///
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/// @FUN{actions.resultError(@FA{req}, @FA{res}, @FA{code}, @FA{errorNum}, @FA{errorMessage}, @FA{headers}, @FA{keyvals})}
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///
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/// The functions generates an error response. The response body is an array
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/// with an attribute @LIT{errorMessage} containing the error message
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/// @FA{errorMessage}, @LIT{error} containing @LIT{true}, @LIT{code} containing
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/// @FA{code}, @LIT{errorNum} containing @FA{errorNum}, and @LIT{errorMessage}
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/// containing the error message @FA{errorMessage}. @FA{keyvals} are mixed
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/// into the result.
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////////////////////////////////////////////////////////////////////////////////
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function ResultError (req, res, httpReturnCode, errorNum, errorMessage, headers, keyvals) {
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res.responseCode = httpReturnCode;
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res.contentType = "application/json";
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if (typeof errorNum === "string") {
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keyvals = headers;
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headers = errorMessage;
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errorMessage = errorNum;
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errorNum = httpReturnCode;
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}
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var result = {};
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if (keyvals !== undefined) {
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for (var i in keyvals) {
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if (keyvals.hasOwnProperty(i)) {
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result[i] = keyvals[i];
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}
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}
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}
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result["error"] = true;
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result["code"] = httpReturnCode;
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result["errorNum"] = errorNum;
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result["errorMessage"] = errorMessage;
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res.body = JSON.stringify(result);
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if (headers !== undefined) {
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res.headers = headers;
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}
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @}
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////////////////////////////////////////////////////////////////////////////////
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// -----------------------------------------------------------------------------
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// --SECTION-- standard HTTP responses
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// -----------------------------------------------------------------------------
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////////////////////////////////////////////////////////////////////////////////
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/// @addtogroup ArangoActions
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/// @{
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////////////////////////////////////////////////////////////////////////////////
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////////////////////////////////////////////////////////////////////////////////
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/// @brief returns a result
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///
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/// @FUN{actions.resultOk(@FA{req}, @FA{res}, @FA{code}, @FA{result}, @FA{headers}})}
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///
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/// The functions defines a response. @FA{code} is the status code to
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/// return. @FA{result} is the result object, which will be returned as JSON
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/// object in the body. @LIT{headers} is an array of headers to returned.
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/// The function adds the attribute @LIT{error} with value @LIT{false}
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/// and @LIT{code} with value @FA{code} to the @FA{result}.
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////////////////////////////////////////////////////////////////////////////////
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function ResultOk (req, res, httpReturnCode, result, headers) {
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res.responseCode = httpReturnCode;
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res.contentType = "application/json";
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// add some default attributes to result
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if (result === undefined) {
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result = {};
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}
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result.error = false;
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result.code = httpReturnCode;
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res.body = JSON.stringify(result);
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if (headers !== undefined) {
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res.headers = headers;
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}
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief generates an error for a bad request
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///
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/// @FUN{actions.resultBad(@FA{req}, @FA{res}, @FA{error-code}, @FA{msg}, @FA{headers})}
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///
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/// The functions generates an error response.
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////////////////////////////////////////////////////////////////////////////////
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function ResultBad (req, res, code, msg, headers) {
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if (msg === undefined || msg === null) {
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msg = GetErrorMessage(code);
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}
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else {
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msg = "" + msg;
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}
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ResultError(req, res, exports.HTTP_BAD, code, msg, headers);
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief generates an error for not found
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///
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/// @FUN{actions.resultNotFound(@FA{req}, @FA{res}, @FA{msg}, @FA{headers})}
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///
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/// The functions generates an error response.
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////////////////////////////////////////////////////////////////////////////////
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function ResultNotFound (req, res, msg, headers) {
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ResultError(req, res, exports.HTTP_NOT_FOUND, exports.ERROR_HTTP_NOT_FOUND, "" + msg, headers);
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief generates an error for unsupported methods
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///
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/// @FUN{actions.resultUnsupported(@FA{req}, @FA{res}, @FA{headers})}
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///
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/// The functions generates an error response.
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////////////////////////////////////////////////////////////////////////////////
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function ResultUnsupported (req, res, headers) {
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ResultError(req, res,
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exports.HTTP_METHOD_NOT_ALLOWED, exports.ERROR_HTTP_METHOD_NOT_ALLOWED,
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"Unsupported method",
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headers);
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @}
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////////////////////////////////////////////////////////////////////////////////
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// -----------------------------------------------------------------------------
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// --SECTION-- ArangoDB specific responses
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// -----------------------------------------------------------------------------
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////////////////////////////////////////////////////////////////////////////////
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/// @addtogroup ArangoActions
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/// @{
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////////////////////////////////////////////////////////////////////////////////
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////////////////////////////////////////////////////////////////////////////////
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/// @brief returns a result set from a cursor
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////////////////////////////////////////////////////////////////////////////////
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function ResultCursor (req, res, cursor, code, options) {
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var rows;
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var count;
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var hasCount;
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var hasNext;
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var cursorId;
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if (Array.isArray(cursor)) {
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// performance optimisation: if the value passed in is an array, we can
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// use it as it is
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hasCount = ((options && options.countRequested) ? true : false);
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count = cursor.length;
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rows = cursor;
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hasNext = false;
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cursorId = null;
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}
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else {
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// cursor is assumed to be an ArangoCursor
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hasCount = cursor.hasCount();
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count = cursor.count();
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rows = cursor.getRows();
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// must come after getRows()
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hasNext = cursor.hasNext();
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cursorId = null;
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if (hasNext) {
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cursor.persist();
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cursorId = cursor.id();
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}
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else {
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cursor.dispose();
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}
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}
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var result = {
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"result" : rows,
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"hasMore" : hasNext
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};
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if (cursorId) {
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result["id"] = cursorId;
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}
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if (hasCount) {
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result["count"] = count;
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}
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if (code === undefined) {
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code = exports.HTTP_CREATED;
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}
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ResultOk(req, res, code, result);
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief generates an error for unknown collection
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///
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/// @FUN{actions.collectionNotFound(@FA{req}, @FA{res}, @FA{collection}, @FA{headers})}
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///
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/// The functions generates an error response.
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////////////////////////////////////////////////////////////////////////////////
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function CollectionNotFound (req, res, collection, headers) {
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if (collection === undefined) {
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ResultError(req, res,
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exports.HTTP_BAD, exports.ERROR_HTTP_BAD_PARAMETER,
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"expecting a collection name or identifier",
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headers);
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}
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else {
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ResultError(req, res,
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exports.HTTP_NOT_FOUND, exports.ERROR_ARANGO_COLLECTION_NOT_FOUND,
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"unknown collection '" + collection + "'", headers);
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}
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief generates an error for unknown index
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///
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/// @FUN{actions.collectionNotFound(@FA{req}, @FA{res}, @FA{collection}, @FA{index}, @FA{headers})}
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///
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/// The functions generates an error response.
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////////////////////////////////////////////////////////////////////////////////
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function IndexNotFound (req, res, collection, index, headers) {
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if (collection === undefined) {
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ResultError(req, res,
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exports.HTTP_BAD, exports.ERROR_HTTP_BAD_PARAMETER,
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"expecting a collection name or identifier",
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headers);
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}
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else if (index === undefined) {
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ResultError(req, res,
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exports.HTTP_BAD, exports.ERROR_HTTP_BAD_PARAMETER,
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"expecting an index identifier",
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headers);
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}
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else {
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ResultError(req, res,
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exports.HTTP_NOT_FOUND, exports.ERROR_ARANGO_INDEX_NOT_FOUND,
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"unknown index '" + index + "'", headers);
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}
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief generates an error for an exception
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///
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/// @FUN{actions.resultException(@FA{req}, @FA{res}, @FA{err}, @FA{headers})}
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///
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/// The functions generates an error response.
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////////////////////////////////////////////////////////////////////////////////
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function ResultException (req, res, err, headers) {
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if (err instanceof ArangoError) {
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var num = err.errorNum;
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var msg = err.errorMessage;
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var code = exports.HTTP_BAD;
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switch (num) {
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case exports.ERROR_INTERNAL: code = exports.HTTP_SERVER_ERROR; break;
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}
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ResultError(req, res, code, num, msg, headers);
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}
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else {
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ResultError(req, res,
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exports.HTTP_SERVER_ERROR, exports.ERROR_HTTP_SERVER_ERROR,
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"" + err,
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headers);
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}
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @}
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////////////////////////////////////////////////////////////////////////////////
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// -----------------------------------------------------------------------------
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// --SECTION-- MODULE EXPORTS
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// -----------------------------------------------------------------------------
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////////////////////////////////////////////////////////////////////////////////
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/// @addtogroup ArangoActions
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/// @{
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////////////////////////////////////////////////////////////////////////////////
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// public functions
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exports.defineHttp = DefineHttp;
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exports.getErrorMessage = GetErrorMessage;
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exports.getJsonBody = GetJsonBody;
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// standard HTTP responses
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exports.resultBad = ResultBad;
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exports.resultNotFound = ResultNotFound;
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exports.resultOk = ResultOk;
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exports.resultUnsupported = ResultUnsupported;
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exports.resultError = ResultError;
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// ArangoDB specific responses
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exports.resultCursor = ResultCursor;
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exports.collectionNotFound = CollectionNotFound;
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exports.indexNotFound = IndexNotFound;
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exports.resultException = ResultException;
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// some useful constants
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exports.COLLECTION = "collection";
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exports.COLLECTION_IDENTIFIER = "collection-identifier";
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exports.COLLECTION_NAME = "collection-name";
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exports.NUMBER = "number";
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exports.DELETE = "DELETE";
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exports.GET = "GET";
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exports.HEAD = "HEAD";
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exports.POST = "POST";
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exports.PUT = "PUT";
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// HTTP 2xx
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exports.HTTP_OK = 200;
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exports.HTTP_CREATED = 201;
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exports.HTTP_ACCEPTED = 202;
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exports.HTTP_PARTIAL = 203;
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exports.HTTP_NO_CONTENT = 204;
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// HTTP 3xx
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exports.HTTP_MOVED_PERMANENTLY = 301;
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exports.HTTP_FOUND = 302;
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exports.HTTP_SEE_OTHER = 303;
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exports.HTTP_NOT_MODIFIED = 304;
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exports.HTTP_TEMPORARY_REDIRECT = 307;
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// HTTP 4xx
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exports.HTTP_BAD = 400;
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exports.HTTP_UNAUTHORIZED = 401;
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exports.HTTP_PAYMENT = 402;
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exports.HTTP_FORBIDDEN = 403;
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exports.HTTP_NOT_FOUND = 404;
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exports.HTTP_METHOD_NOT_ALLOWED = 405;
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exports.HTTP_CONFLICT = 409;
|
|
exports.HTTP_PRECONDITION_FAILED = 412;
|
|
exports.HTTP_UNPROCESSABLE_ENTIT = 422;
|
|
|
|
// HTTP 5xx
|
|
exports.HTTP_SERVER_ERROR = 500;
|
|
exports.HTTP_NOT_IMPLEMENTED = 501;
|
|
exports.HTTP_BAD_GATEWAY = 502;
|
|
exports.HTTP_SERVICE_UNAVAILABLE = 503;
|
|
|
|
// copy error codes
|
|
for (var name in internal.errors) {
|
|
if (internal.errors.hasOwnProperty(name)) {
|
|
exports[name] = internal.errors[name].code;
|
|
}
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @}
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
// Local Variables:
|
|
// mode: outline-minor
|
|
// outline-regexp: "^\\(/// @brief\\|/// @addtogroup\\|// --SECTION--\\|/// @page\\|/// @}\\)"
|
|
// End:
|