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var inherits = require('inherits'); inherits(PouchError, Error); function PouchError(opts) { Error.call(opts.reason); this.status = opts.status; this.name = opts.error; this.message = opts.reason; this.error = true; } PouchError.prototype.toString = function () { return JSON.stringify({ status: this.status, name: this.name, message: this.message }); }; exports.UNAUTHORIZED = new PouchError({ status: 401, error: 'unauthorized', reason: "Name or password is incorrect." }); exports.MISSING_BULK_DOCS = new PouchError({ status: 400, error: 'bad_request', reason: "Missing JSON list of 'docs'" }); exports.MISSING_DOC = new PouchError({ status: 404, error: 'not_found', reason: 'missing' }); exports.REV_CONFLICT = new PouchError({ status: 409, error: 'conflict', reason: 'Document update conflict' }); exports.INVALID_ID = new PouchError({ status: 400, error: 'invalid_id', reason: '_id field must contain a string' }); exports.MISSING_ID = new PouchError({ status: 412, error: 'missing_id', reason: '_id is required for puts' }); exports.RESERVED_ID = new PouchError({ status: 400, error: 'bad_request', reason: 'Only reserved document ids may start with underscore.' }); exports.NOT_OPEN = new PouchError({ status: 412, error: 'precondition_failed', reason: 'Database not open' }); exports.UNKNOWN_ERROR = new PouchError({ status: 500, error: 'unknown_error', reason: 'Database encountered an unknown error' }); exports.BAD_ARG = new PouchError({ status: 500, error: 'badarg', reason: 'Some query argument is invalid' }); exports.INVALID_REQUEST = new PouchError({ status: 400, error: 'invalid_request', reason: 'Request was invalid' }); exports.QUERY_PARSE_ERROR = new PouchError({ status: 400, error: 'query_parse_error', reason: 'Some query parameter is invalid' }); exports.DOC_VALIDATION = new PouchError({ status: 500, error: 'doc_validation', reason: 'Bad special document member' }); exports.BAD_REQUEST = new PouchError({ status: 400, error: 'bad_request', reason: 'Something wrong with the request' }); exports.NOT_AN_OBJECT = new PouchError({ status: 400, error: 'bad_request', reason: 'Document must be a JSON object' }); exports.DB_MISSING = new PouchError({ status: 404, error: 'not_found', reason: 'Database not found' }); exports.IDB_ERROR = new PouchError({ status: 500, error: 'indexed_db_went_bad', reason: 'unknown' }); exports.WSQ_ERROR = new PouchError({ status: 500, error: 'web_sql_went_bad', reason: 'unknown' }); exports.LDB_ERROR = new PouchError({ status: 500, error: 'levelDB_went_went_bad', reason: 'unknown' }); exports.FORBIDDEN = new PouchError({ status: 403, error: 'forbidden', reason: 'Forbidden by design doc validate_doc_update function' }); exports.INVALID_REV = new PouchError({ status: 400, error: 'bad_request', reason: 'Invalid rev format' }); exports.FILE_EXISTS = new PouchError({ status: 412, error: 'file_exists', reason: 'The database could not be created, the file already exists.' }); exports.MISSING_STUB = new PouchError({ status: 412, error: 'missing_stub' }); exports.error = function (error, reason, name) { function CustomPouchError(reason) { // inherit error properties from our parent error manually // so as to allow proper JSON parsing. /* jshint ignore:start */ for (var p in error) { if (typeof error[p] !== 'function') { this[p] = error[p]; } } /* jshint ignore:end */ if (name !== undefined) { this.name = name; } if (reason !== undefined) { this.reason = reason; } } CustomPouchError.prototype = PouchError.prototype; return new CustomPouchError(reason); }; // Find one of the errors defined above based on the value // of the specified property. // If reason is provided prefer the error matching that reason. // This is for differentiating between errors with the same name and status, // eg, bad_request. exports.getErrorTypeByProp = function (prop, value, reason) { var errors = exports; var keys = Object.keys(errors).filter(function (key) { var error = errors[key]; return typeof error !== 'function' && error[prop] === value; }); var key = reason && keys.filter(function (key) { var error = errors[key]; return error.message === reason; })[0] || keys[0]; return (key) ? errors[key] : null; }; exports.generateErrorFromResponse = function (res) { var error, errName, errType, errMsg, errReason; var errors = exports; errName = (res.error === true && typeof res.name === 'string') ? res.name : res.error; errReason = res.reason; errType = errors.getErrorTypeByProp('name', errName, errReason); if (res.missing || errReason === 'missing' || errReason === 'deleted' || errName === 'not_found') { errType = errors.MISSING_DOC; } else if (errName === 'doc_validation') { // doc validation needs special treatment since // res.reason depends on the validation error. // see utils.js errType = errors.DOC_VALIDATION; errMsg = errReason; } else if (errName === 'bad_request' && errType.message !== errReason) { // if bad_request error already found based on reason don't override. errType = errors.BAD_REQUEST; } // fallback to error by statys or unknown error. if (!errType) { errType = errors.getErrorTypeByProp('status', res.status, errReason) || errors.UNKNOWN_ERROR; } error = errors.error(errType, errReason, errName); // Keep custom message. if (errMsg) { error.message = errMsg; } // Keep helpful response data in our error messages. if (res.id) { error.id = res.id; } if (res.status) { error.status = res.status; } if (res.missing) { error.missing = res.missing; } return error; }; |